JPH06265915A - Discharge device for filling liquid crystal - Google Patents

Discharge device for filling liquid crystal

Info

Publication number
JPH06265915A
JPH06265915A JP5190293A JP5190293A JPH06265915A JP H06265915 A JPH06265915 A JP H06265915A JP 5190293 A JP5190293 A JP 5190293A JP 5190293 A JP5190293 A JP 5190293A JP H06265915 A JPH06265915 A JP H06265915A
Authority
JP
Japan
Prior art keywords
liquid crystal
filling
syringe
pulse motor
slide block
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
JP5190293A
Other languages
Japanese (ja)
Inventor
Tooru Kitamachi
Hirotada Minafuji
Naoki Nishimoto
Minoru Terada
亨 北町
稔 寺田
裕祥 皆藤
直樹 西本
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 JP5190293A priority Critical patent/JPH06265915A/en
Publication of JPH06265915A publication Critical patent/JPH06265915A/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

PURPOSE:To provide the discharger for filling a liquid crystal which can shorten the time for filling Mg liquid crystal and can improve quality by dropping the liquid crystal in compliance with a target value on one sheet of a substrate as the discharger for filling the liquid crystal for interposing the liquid crystal between two pairs of transparent substrates with electrodes constituting a liquid crystal display element. CONSTITUTION:A piston 12 in a syringe 11 is directly coupled by means of a ball screw 13 and a pulse motor 14 and the required displacement is controlled by the pulse motor 14, by which the liquid crystal 16 is discharged with good accuracy. The replenishment of the liquid crystal 16 into the syringe 11 is executed by replenishing the liquid crystal 16 from a replenishing port 22 through a filling pipe 21 from a hermetic container 19 which is completely hermetically sealed to avoid intrusion of dust, etc., and, therefore, the replenishment is completed in a short time. The productivity is thus improved and the intrusion of the dust, etc., is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal filling device used to fill a liquid crystal substance in a liquid crystal display device used for a thin, lightweight and low power consumption display. The present invention relates to a discharge device.

[0002]

2. Description of the Related Art In recent years, liquid crystal display panels are thin, lightweight, and low power consumption displays such as small display cells such as watches and calculators, large display elements such as personal computers and word processors, and high-definition large cover sheets such as workstations. Widely used as an element.

In general, these liquid crystal display elements are patterned transparent electrodes 1, 1 as shown in FIG.
Two transparent substrates 2 and 2A each having A on each surface and having electrodes are opposed to each other, and a liquid crystal 3 and a spacer for determining the gap are interposed in the gap (hereinafter referred to as a gap) to surround the peripheral portion. It is fixed with a sealant 4 and polarizing plates 5 and 5A are provided on both surfaces thereof.

In order to form such a liquid crystal display element, a conventional liquid crystal filling ejection device has a liquid crystal 3 interposed between two transparent substrates 2 and 2A having electrodes, as shown in FIG. Same as the transparent substrate 2 with an electrode provided with an inlet 4A
A is laminated to form a transparent electrode substrate 6 having a sandwich type structure, and the inside of the vacuum container 7 is returned to the atmosphere while being immersed in the liquid crystal reservoir 8 in the vacuum container 7 as shown in FIG. The liquid crystal 3 was configured to be injected from the injection port 4A.

[0005]

However, in the above-mentioned conventional structure, depressurization and pressurization are performed in order to utilize the capillary phenomenon in a state where the inlet 4A is immersed in the liquid crystal 3 of the liquid crystal reservoir 8 in the vacuum container 7. For this reason, it takes a long time to inject the liquid crystal 3, and in the case of a large-sized panel, it may take 60 minutes or more, resulting in a problem of poor productivity. Further, there is a problem in terms of quality such as dust entering the liquid crystal reservoir 8 and causing a defect.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a liquid crystal filling discharge device which improves productivity and stabilizes quality.

[0007]

In order to solve the above problems, a liquid crystal filling discharge device according to the present invention comprises a syringe having a discharge nozzle at its lower end for discharging a fixed amount of liquid crystal filled therein, and a syringe A slide block whose one end is coupled to the built-in piston, a pulse motor that drives a piston through the slide block by rotating a ball screw that is screwed with a screw portion provided on the slide block, and a terminal portion on the syringe. Is filled with liquid crystal to be filled in a closed container and pressure-fed into the syringe, an inlet for introducing gas into the closed container, and a solenoid valve provided in the middle of the path of the filled pipe. It is configured as follows.

[0008]

With this structure, the liquid crystal filled in the syringe can be discharged accurately and in a short time by driving the piston incorporated in the syringe with the pulse motor through the ball screw. In addition to being possible, it is possible to improve productivity by pumping and filling the liquid crystal from a closed container into the syringe that has discharged the liquid crystal, and also highly reliable in which foreign substances such as dust are not mixed in the liquid crystal. Becomes

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal filling ejection device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front sectional view showing the structure of a liquid crystal filling discharge device according to the embodiment. In FIG. 1, 11 is a syringe in which a liquid crystal 16 is filled, and 15 is a lower end of the syringe 11. A discharge nozzle for discharging the liquid crystal 16, 12 is a piston incorporated in the syringe 11, 20 is a slide block whose one end is connected to the piston 12, and 13 is screwed to a screw portion provided on the slide block 20. The ball screw 14 is a pulse motor in which the ball screw 13 is coupled.

Reference numeral 19 is a closed container provided to replenish the liquid crystal 16 in the syringe 11. The closed container 19 is filled with the liquid crystal 16. Reference numeral 23 is a gas supply pipe for introducing an inert gas such as N 2 gas into the closed container 19 from the outside, 21 is a filling pipe for sending out the liquid crystal 16 filled in the closed container 19, and 17 is this filling. An electromagnetic valve 22 provided in the middle of the path of the pipe 21 is a replenishment port provided in the syringe 11, and the terminal end of the filling pipe 21 is connected to the replenishment port 22.

FIG. 2 is an exploded perspective view showing the structure of a transparent substrate with electrodes for ejecting the liquid crystal 16 using the liquid crystal filling ejection device according to the present invention. In FIG. 2, 2 and 2A are transparent with electrodes. Substrates 4 are sealants.

The operation of the liquid crystal filling ejection device of the present invention thus constructed will be described below.

First, the transparent substrate 2 with an electrode on which the sealant 4 shown in FIG. 2 having no injection port is formed is arranged below the discharge nozzle 15 of the same apparatus shown in FIG.
A control unit (not shown) rotates the pulse motor 14 by a necessary amount in order to discharge the liquid crystal 16 in a fixed amount within a frame surrounded by. As the pulse motor 14 rotates, the ball screw 13 coupled to the pulse motor 14 rotates, and the slide block 20 provided with a screw portion that engages with the ball screw 13 descends (rotates the pulse motor 14 with the rotation of the ball screw 13). It will rise if rotated in the reverse direction).

As the slide block 20 descends, the piston 12 connected to one end of the slide block 20 descends, and the liquid crystal 1 filled in the syringe 11 is moved.
6 is discharged from the discharge nozzle 15 connected to the lower end to fill the transparent electrode 2 with the electrode at a predetermined position.

At this time, since the amount of the liquid crystal 16 to be discharged is correlated with the moving amount of the piston 12, not only the filling amount of the liquid crystal 16 can be easily adjusted by controlling the rotation of the pulse motor 14. The liquid crystal 16 can be filled in an extremely short time.

When the liquid crystal 16 is replenished into the syringe 11, the electromagnetic valve 17 is switched to supply the inert gas such as the N 2 gas 18 from the gas supply pipe 23 under pressure to supply the inside of the closed container 19. The liquid crystal 16 filled in the airtight container 19 is discharged through the filling pipe 21, and the syringe 1 is supplied from the refill port 22 to which the end portion of the filling pipe 21 is connected.
1, the liquid crystal 16 is replenished.

By thus replenishing the liquid crystal 16 in the syringe 11, not only the replenishment of the liquid crystal 16 can be performed in an extremely short time, but also the liquid crystal 16 is sealed in the closed container 19.
Since it is in a state of being confined inside the liquid crystal, it is possible to perform highly reliable liquid crystal filling without mixing impurities such as dust.

[0019]

As described above, in the liquid crystal filling ejection device according to the present invention, it is possible to precisely drop the liquid crystal according to the target value to a predetermined position, and it is possible to greatly shorten the liquid crystal filling time. In addition, the liquid crystal can be replenished into the syringe not only in a short time by providing the replenishing port, but also when the liquid crystal is replenished from the completely sealed container, impurities such as dust are not mixed. It is possible to improve the quality without any improvement, and it is a great contribution to improve the productivity and the quality at the same time.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view showing the configuration of a liquid crystal filling ejection device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of a transparent substrate with electrodes used in the same embodiment.

FIG. 3 is a sectional view showing a configuration of a liquid crystal display element.

FIG. 4 is an exploded perspective view showing a configuration of a transparent substrate with electrodes used in a conventional liquid crystal filling ejection device.

FIG. 5 is a front sectional view showing the structure of a conventional liquid crystal filling ejection device.

[Explanation of symbols]

1 Patterned transparent electrode 1A Patterned transparent electrode 2 Transparent substrate with electrode 2A Transparent substrate with electrode 3 Liquid crystal 4 Sealant 5 Polarizing plate 5A Polarizing plate 11 Syringe 12 Piston 13 Ball screw 14 Pulse motor 15 Discharge nozzle 16 Liquid crystal 17 Solenoid Valve 18 N 2 Gas 19 Closed Container 20 Slide Block 21 Filling Pipe 22 Refilling Port 23 Gas Supply Pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Kitamachi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims]
1. A syringe having a discharge nozzle at a lower end for discharging a fixed amount of liquid crystal filled therein, a slide block having one end coupled to a piston incorporated in the syringe, and a screw provided on the slide block. Pulse motor for driving a piston through the slide block by rotating a ball screw that is screwed together with a portion, and a filling tube for filling the syringe with liquid crystal that is connected to the syringe and has a terminal end portion filled in a hermetically sealed container and pressure-fed. And a liquid crystal filling discharge device comprising an inlet for introducing gas into the closed container and a solenoid valve provided in the middle of the path of the filling pipe.
JP5190293A 1993-03-12 1993-03-12 Discharge device for filling liquid crystal Pending JPH06265915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5190293A JPH06265915A (en) 1993-03-12 1993-03-12 Discharge device for filling liquid crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5190293A JPH06265915A (en) 1993-03-12 1993-03-12 Discharge device for filling liquid crystal

Publications (1)

Publication Number Publication Date
JPH06265915A true JPH06265915A (en) 1994-09-22

Family

ID=12899815

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5190293A Pending JPH06265915A (en) 1993-03-12 1993-03-12 Discharge device for filling liquid crystal

Country Status (1)

Country Link
JP (1) JPH06265915A (en)

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