JPH0651256A - Device for discharging liquid crystal - Google Patents

Device for discharging liquid crystal

Info

Publication number
JPH0651256A
JPH0651256A JP20333392A JP20333392A JPH0651256A JP H0651256 A JPH0651256 A JP H0651256A JP 20333392 A JP20333392 A JP 20333392A JP 20333392 A JP20333392 A JP 20333392A JP H0651256 A JPH0651256 A JP H0651256A
Authority
JP
Japan
Prior art keywords
liquid crystal
shaft
sleeve
discharge device
device according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP20333392A
Other languages
Japanese (ja)
Inventor
Teruo Maruyama
Koji Sonoda
Haruo Tada
照雄 丸山
孝司 園田
治夫 夛田
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd, 松下電器産業株式会社 filed Critical Matsushita Electric Ind Co Ltd
Priority to JP20333392A priority Critical patent/JPH0651256A/en
Publication of JPH0651256A publication Critical patent/JPH0651256A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1341Filling or closing of cells
    • G02F2001/13415Drop filling process

Abstract

(57) [Summary] [Object] The present invention relates to a liquid crystal ejecting device for applying liquid crystal to the inner surface of a panel substrate, such as a liquid crystal dropping device used in a liquid crystal injecting process in a liquid crystal display panel assembling process. It is an object of the present invention to provide a liquid crystal ejecting device which ejects a predetermined amount of liquid crystal by the rotation of. [Structure] For example, in FIG. 1, when the shaft is in a stopped state, liquid crystal is not dropped from the tip of the nozzle. Next, when the shaft is rotated via the rotating mechanism, the liquid crystal present in the gap between the shaft and the inner surface of the sleeve is pushed down toward the tip of the nozzle due to the effect of the spiral groove, and the liquid crystal can be dropped. Here, the dropping amount of the liquid crystal can be arbitrarily changed by changing the number of rotations of the shaft or the shape and angle of the groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal discharge device for applying liquid crystal to the inner surface of a substrate in the process of assembling a liquid crystal display panel.

[0002]

2. Description of the Related Art In a liquid crystal manufacturing process for manufacturing a liquid crystal panel, the technique of encapsulating liquid crystal in the gap surface of two substrates to be bonded together is important for controlling the performance of the liquid crystal display panel such as uniformity of image quality. Play a different role.
Therefore, the liquid crystal manufacturing technique requires a method of uniformly filling the liquid crystal in the panel.

A conventional liquid crystal dropping device will be described below as a specific example. FIG. 7 shows a basic configuration of a conventional liquid crystal dropping device. In FIG. 7, 1 is a substrate, 2
Is a liquid crystal, and 3 is a nozzle. 200 is a piston, 201
Is a cylinder, and 202 is a pressurizing mechanism, and the liquid crystal is dropped from the tip of the nozzle by the operation of the pressurizing mechanism.

The operation of the liquid crystal dropping apparatus constructed as above will be described below. First, a dropping device having a nozzle at the tip is placed on the upper surface of the substrate. Liquid crystal is filled in the cylinder. When the tip of the nozzle is at the dropping position, the cylinder is moved by operating the pressurizing mechanism, and the liquid crystal is dropped from the tip of the nozzle. Here, a screw feed mechanism is used as the pressure mechanism. After the dropping, the substrate or the nozzle is moved to the next dropping point by a moving mechanism such as an XY table and the same operation is repeated. In this way, after the liquid crystal is evenly dropped on the substrate, 2
By sticking the substrates together, the separated droplets are connected to each other, and the gap between the substrates is filled with the liquid crystal uniformly.

[0005]

However, in the above-mentioned conventional structure, there is a limit in the resolution of the pressurizing mechanism such as the resolution of the ball screw and the mechanical backlash, and the dropping amount varies, so that accurate flow rate control is possible. It had the problem of difficulty. As a result, problems such as image quality unevenness have occurred.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a liquid crystal dropping device capable of improving ejection accuracy and improving reliability.

[0007]

In order to achieve this object, the liquid crystal dropping apparatus of the present invention has the following constitution.

That is, according to claim 1, a sleeve for accommodating the shaft, a bearing provided between the shaft and the sleeve, a drive means for relatively rotating the shaft and the sleeve, and a surface of the shaft. Alternatively, a groove is formed on the inner surface of the sleeve, a fluid pressure feed unit is provided between the shaft and the sleeve, and a liquid crystal discharge pump is configured by an inflow hole and a discharge hole for supplying liquid crystal in a fluid state to the fluid pressure feed unit, In order to define the relative position of the liquid crystal discharge pump and the panel substrate, a moving mechanism provided in either the pump or the panel is provided.

According to a second aspect of the present invention, in the liquid crystal discharge device according to the first aspect, the moving mechanism that defines the relative position is an XY stage.

According to a third aspect of the present invention, in the liquid crystal discharge device according to the first aspect, the liquid crystal beads are mixed.

According to a fourth aspect of the present invention, in the liquid crystal discharge device according to the first aspect, the fluid pumping section is provided with a circulation path connecting the inflow side and the outflow side, and means for opening and closing the circulation path is provided. Have a configuration.

According to a fifth aspect of the present invention, in the liquid crystal discharge device according to the first aspect, a plurality of the liquid crystal discharge pumps are combined.

According to a sixth aspect of the present invention, in the liquid crystal discharge device according to the first aspect, while detecting the temperature of the liquid crystal in the flowing state,
It has the structure which controls the rotation speed of the said drive means.

According to a seventh aspect of the present invention, in the liquid crystal discharge device according to the first aspect, a seal means is provided between the bearing and the pumping section to block intrusion of impurities into the liquid crystal.

An eighth aspect of the present invention is the liquid crystal discharge device according to the first aspect, wherein the sealing means is a compressed gas.

[0016]

With this configuration, the relative movement of the shaft and the sleeve due to the rotation gives a circumferential velocity to the transport fluid, whereby the liquid crystal can be stirred and the liquid crystal can be discharged quantitatively and minutely. It is also possible to control the outflow amount from the nozzle to a predetermined amount by changing the rotation speed.

[0017]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a substrate, which is positioned at a position to be ejected by an XY table. 2 is a liquid crystal to be ejected. 3 is a nozzle, and the liquid crystal 2 is from the nozzle.
Is discharged. Reference numeral 4 denotes a shaft, which has a spiral groove 101. Reference numeral 5 is a sleeve, 6 is a motor, which is connected to the other end of the shaft 4, and the shaft 4 rotates via the motor 6. 7 is a liquid crystal, 8 is a liquid crystal container, 9 is a pipe for injecting the liquid crystal into the device, and the liquid crystal 7 is stored in the liquid crystal container 8.
Is injected into the gap between the shaft 4 having the groove 101 and the inner surface of the sleeve 5 through the pipe 9. Where 10, 11
Is a bearing, 12 is a housing, 13 is a packing, and 14 is a cover. Further, 15 and 16 are support bases.

Here, FIG. 2A shows an enlarged view between the shaft and the sleeve, and FIG. 2B is an enlarged view when a groove is formed in the sleeve.

The operation of the liquid crystal discharge device constructed as described above will be described. In FIG. 1, when the shaft does not rotate, liquid crystal is not ejected from the nozzle tip. Next, when the shaft is rotated via the motor, the liquid crystal is sent toward the tip of the nozzle by the fluid pressure feeding section between the shaft and the sleeve, and the liquid crystal is ejected. Here, the discharge amount of the liquid crystal can be arbitrarily changed by changing the rotational speed of the shaft or the shape and angle of the groove.

As described above, according to the present embodiment, the shaft, the sleeve for accommodating the shaft, and the rotation driving mechanism are formed, and the shaft or the sleeve has a groove. By relatively moving the inner surface of the sleeve having the groove, the liquid crystal can be dropped while stirring. Here, the spiral groove for pumping the fluid has a depth of several microns to several tens of microns, and as shown in FIGS. 2 (a) and 2 (b), the spiral groove may be formed on either the shaft or the inner surface of the sleeve. Good.

Here, in order to uniformly apply the liquid crystal to the panel substrate, it is necessary to sequentially change the relative positions of the panel substrate and the liquid crystal discharge pump. In the first embodiment, the liquid crystal is uniformly applied to the panel substrate by sequentially changing the relative positions of the panel substrate and the liquid crystal discharge pump by the XY table.

As described above, according to the present embodiment, the liquid crystal discharge pump and the XY table are constituted, and the liquid crystal coated surface of the liquid crystal discharge pump and the panel substrate is relatively moved by the XY table, so that the liquid crystal is discharged. It can be applied to the panel substrate while stirring.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

The configuration in FIG. 3 is the same as that in FIGS. 1 and 2, and the difference from the configurations in FIGS. 1 and 2 is that the circulation path 1
7 and a valve 18, which is a flow rate opening / closing means, is provided on the sleeve.

The operation of the liquid crystal discharge device configured as described above will be described. First, the shaft is rotated via the rotating mechanism. At this time, if the valve 18 is closed, dripping is performed as in the case of FIGS. 1 and 2. Here, when the valve is opened during the rotation, the liquid crystal in the lower part of the sleeve is circulated to the upper part through the circulation path 17, and therefore the liquid is not discharged. That is, the liquid crystal ejection is controlled by opening and closing the valve.

As described above, according to this embodiment, the shaft, the sleeve for housing the shaft, and the rotation driving mechanism are formed, and the sleeve or the shaft has a groove, and the shaft and the shaft are rotated by the rotation of the shaft. By relatively moving the inner surface having the groove of the sleeve, the liquid crystal can be discharged while stirring, and the discharge can be controlled by turning the valve ON / OFF.

In the second embodiment, the circulation path 17
Although the valve 18 and the valve 18 are provided on the sleeve, the circulation path 17 may be a tube or tube through which liquid crystal flows, and the valve 18 may be a flow rate control device.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings.

The structure in FIG. 4 is the same as that in FIGS. 1 and 2, and the difference from the structures in FIGS. 1 and 2 is that a plurality of the liquid crystal discharge pumps are combined.

As described above, according to this embodiment, the liquid crystal can be applied in a short time by combining a plurality of the liquid crystal discharge pumps. (Embodiment 4) Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings.

The structure in FIG. 5 is the same as that in FIGS. 1 and 2, and the difference from the structures in FIGS. 1 and 2 is that an element for detecting the temperature of the liquid crystal and a rotation speed control means are provided.

The operation of the liquid crystal discharge device configured as described above will be described with reference to FIG.

First, the basic operation of the liquid crystal discharge pump is as follows.
This is similar to the case of the first embodiment. Here, since the viscosity of the liquid crystal changes depending on the temperature, the ejection amount also changes at the same rotation speed. Therefore, it is necessary to eject a certain amount of liquid crystal regardless of the temperature change. That is, the temperature of the liquid crystal present in the fluid pumping section is measured by a temperature detecting element such as a thermocouple. Next, the temperature change information is fed back to the rotation speed control means, and even if the viscosity changes due to the temperature change, the rotation speed is changed to give a constant discharge amount.
Here, FIG. 5B shows a block diagram of the control method.

As described above, according to the present embodiment, by providing the element for detecting the temperature of the liquid crystal and the rotation speed control means, it is possible to perform the constant liquid crystal discharge.

(Embodiment 5) A fifth embodiment of the present invention will be described below with reference to the drawings.

The configuration in FIG. 6 is the same as that in FIGS. 1 and 2, and is different from the configurations in FIGS. 1 and 2 in that a sealing means is provided between the bearing and the pressure-feeding section for blocking the intrusion of impurities into the liquid crystal. That is the point.

The operation of the liquid crystal discharge device configured as described above will be described with reference to FIG. FIG. 6 is an enlarged view of the seal portion in the fifth embodiment.

First, the basic operation of the liquid crystal discharge pump is as follows.
This is similar to the case of the first embodiment. Here, N 2 gas, which is a compressed gas here, is caused to flow between the liquid crystal flowing into the fluid pressure-feeding portion and the bearing as a sealing means to block the intrusion of impurities into the liquid crystal.

As described above, according to the present embodiment, by providing the sealing means between the bearing and the pressure-feeding section for blocking the intrusion of impurities into the liquid crystal, it is possible to discharge the liquid crystal without mixing the impurities.

[0041]

As described above, according to the present invention, the sleeve for accommodating the shaft, the bearing provided between the shaft and the sleeve, and the drive means for relatively rotating the shaft and the sleeve are provided. , A groove is formed on the surface of the shaft or the inner surface of the sleeve to provide a fluid pumping section between the shaft and the sleeve, and liquid crystal is discharged from an inflow hole and a discharge hole for supplying liquid crystal in a fluid state to the fluid pumping section. In order to define a relative position between the liquid crystal discharge pump and the panel substrate, which constitutes a pump, it is constituted by a moving mechanism provided on either the pump or the panel, and by rotation, it is connected to the groove portion of the shaft or the sleeve. It is possible to realize an excellent liquid crystal ejecting device capable of ejecting liquid crystal by relatively moving the facing surfaces and ejecting liquid crystal containing fine powder, for example. A.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a liquid crystal discharge device according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a shaft and a sleeve of the liquid crystal discharge device according to the first embodiment of the present invention.

FIG. 3 is an operation explanatory diagram of a liquid crystal discharge device according to a second embodiment of the present invention.

FIG. 4 is a schematic view of a liquid crystal discharge device according to a third embodiment of the present invention.

FIG. 5 is a schematic view of a liquid crystal discharge device according to a fourth embodiment of the present invention.

FIG. 6 is a schematic view of a liquid crystal discharge device according to a fifth embodiment of the present invention.

FIG. 7 is a schematic view of a conventional liquid crystal dropping device.

[Explanation of symbols]

1 Substrate 2 Droplet 3 Nozzle 4 Axis 5 Sleeve 6 Motor 7 Liquid Crystal 8 Liquid Crystal Container 9 Piping 10, 11 Bearing 12 Housing 13 Packing 14 Cover 15, 16 Support 17 Circulation Path 18 ON / OFF Valve 101, 102, 103 Groove 200 Piston 201 Cylinder 202 Pressurizing mechanism 301 XY table 401 Temperature detecting element (thermoelectric body) 402 Rotation speed control means 501 N 2 sealing means 502 N 2 gas supply pipe 503 N 2 gas exhaust pipe

Claims (8)

[Claims]
1. A sleeve for accommodating a shaft, a bearing provided between the shaft and the sleeve, drive means for relatively rotating the shaft and the sleeve, and a surface of the shaft or the sleeve. A groove is formed on the inner surface, a fluid pressure feed unit is provided between the shaft and the sleeve, and a liquid crystal discharge pump is configured by an inflow hole and a discharge hole for supplying liquid crystal in a fluid state to the fluid pressure feed unit. And a liquid crystal discharge device configured by a moving mechanism provided on either the pump or the panel to define the relative position of the panel substrate.
2. The liquid crystal discharge device according to claim 1, wherein the moving mechanism that defines the relative position is an XY stage.
3. The liquid crystal discharge device according to claim 1, wherein the liquid crystal has beads mixed therein.
4. The liquid crystal discharge device according to claim 1, wherein the fluid pumping unit is provided with a circulation path connecting the inflow side and the outflow side, and means for opening and closing the circulation path.
5. The liquid crystal ejecting apparatus according to claim 1, wherein the liquid crystal ejecting pump has a configuration in which a plurality of the liquid crystal ejecting pumps are combined.
6. The liquid crystal ejecting apparatus according to claim 1, wherein the rotation number of the drive means is controlled while detecting the temperature of the liquid crystal in the flowing state.
7. The liquid crystal ejecting apparatus according to claim 1, further comprising a sealing device between the bearing and the pressure feeding unit, the sealing device blocking intrusion of impurities into the liquid crystal.
8. The liquid crystal discharge device according to claim 1, wherein the sealing means is a compressed gas.
JP20333392A 1992-07-30 1992-07-30 Device for discharging liquid crystal Pending JPH0651256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20333392A JPH0651256A (en) 1992-07-30 1992-07-30 Device for discharging liquid crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20333392A JPH0651256A (en) 1992-07-30 1992-07-30 Device for discharging liquid crystal

Publications (1)

Publication Number Publication Date
JPH0651256A true JPH0651256A (en) 1994-02-25

Family

ID=16472280

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JPH0651256A (en)

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