JPH06235925A - Manufacture of liquid crystal display element - Google Patents

Manufacture of liquid crystal display element

Info

Publication number
JPH06235925A
JPH06235925A JP2226493A JP2226493A JPH06235925A JP H06235925 A JPH06235925 A JP H06235925A JP 2226493 A JP2226493 A JP 2226493A JP 2226493 A JP2226493 A JP 2226493A JP H06235925 A JPH06235925 A JP H06235925A
Authority
JP
Japan
Prior art keywords
liquid crystal
electrode substrates
crystal display
sealing material
display element
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
JP2226493A
Other languages
Japanese (ja)
Inventor
Katsuya Tamaoki
勝也 玉置
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 JP2226493A priority Critical patent/JPH06235925A/en
Publication of JPH06235925A publication Critical patent/JPH06235925A/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
    • 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) [Abstract] [Purpose] To provide a method for manufacturing a liquid crystal display device, in which liquid crystal is not filled in a long time, liquid crystal is not contaminated or dust is not mixed, and the liquid crystal dropping amount is not required to be accurate. . [Structure] A sealing material 3 provided with a liquid crystal discharge port 5 in advance is disposed on at least one of the opposing electrode substrates 1 and 2,
A required amount of liquid crystal 6 is dropped on the electrode substrate 1, and then 2
The above electrode substrates are stuck together in a vacuum, excess liquid crystal is discharged, and the sealing material 7 is applied. [Effects] With the above configuration, liquid crystal injection and sealing can be performed in a short time, and contamination of liquid crystal and contamination of dust can be eliminated.
Further, the liquid crystal can be easily manufactured without requiring the accuracy of the liquid crystal dropping amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display element used as a thin, lightweight and low power consumption display.

[0002]

2. Description of the Related Art Today, liquid crystal display devices are widely used in various fields as thin, lightweight, and low power consumption displays, and their usage will increase in the future.

Conventionally, the following methods have been proposed as a method for manufacturing the liquid crystal display device.

(A) As shown in FIGS. 3 (a) to 3 (e), two electrode substrates 10 and 11 arranged to face each other are sealed with a sealing material 12.
A method of making a container having a sandwich type cell structure by adhering and fixing using a liquid crystal, and enclosing and sealing the liquid crystal by means of capillary action, pressurization, or vacuum from the liquid crystal injection port 14 provided in advance in the sealing section. . In the figure, 13 is a spacer for keeping the substrate spacing constant, and 16 is a sealing resin.

(B) As shown in FIGS. 4 (a) to 4 (d), a sealing material 19 is arranged on at least one of the two electrode substrates 17 and 18 which face each other, and a liquid crystal 22 is fixed on the electrode substrate 17. A method of dropping a certain amount and bonding the two electrode substrates 17 and 18 in a vacuum.

[0006]

However, in the above method (A), since the end face of the injection port always contacts the liquid crystal, the liquid crystal is contaminated or dust is mixed, which causes quality trouble of the liquid crystal display panel. Become. Further, in this method, it takes a long time to inject the liquid crystal, and it sometimes takes 60 minutes or more for a large-sized liquid crystal display device, for example.
Furthermore, when the electrode substrate is made of a flexible material such as a film, the upper and lower electrode substrates come into contact with each other due to a pressure difference during liquid crystal injection, resulting in poor alignment.

In the method (B), the method disclosed in Japanese Patent Laid-Open No. 62-
Although measures have been taken to overcome the problems of the above method (A) as disclosed in Japanese Patent No. 89025, there is a problem in that display unevenness occurs when the liquid crystal dropping amount accuracy is low. . On the other hand, if the spacer is not fixed to the electrode substrate, the spacer also moves due to the flow of the liquid crystal during dropping / bonding, which causes a problem that the gap becomes nonuniform.

The present invention has been made to solve the above-mentioned problems. It takes no time to fill the liquid crystal, the liquid crystal is not contaminated and dust is not mixed, and the accuracy of the liquid crystal dropping amount is improved. It is an object of the present invention to provide a novel manufacturing method that does not require it.

[0009]

In order to achieve this object, a method of manufacturing a liquid crystal display element according to the present invention is such that a sealing material having a liquid crystal discharge port is provided on at least one of two electrode substrates facing each other. Put more than necessary amount of liquid crystal on the electrode substrate,
After that, the above-mentioned two electrode substrates are bonded together in a vacuum, and excess liquid crystal is discharged. In addition, before dropping the liquid crystal, adhesive spacers (those coated with a thermoplastic resin or a thermosetting resin in advance) are uniformly arranged on the electrode substrate and heated to adhere to the electrode substrate.

[0010]

According to this method, the liquid crystal is placed on the electrode substrate,
After that, by quickly combining the electrode substrates in a vacuum and discharging the excess liquid crystal, the liquid crystal can be injected and sealed in a short time, and the accuracy of the liquid crystal dropping amount is not required, and furthermore, the adhesive spacer should be used. Since it is possible to prevent the spacers from moving due to the flow of the liquid crystal at the time of dropping / bonding, it is possible to easily obtain a uniform cell gap, and its utility value is extremely great.

[0011]

1 (a) to 1 (e) are conceptual views showing an embodiment of a manufacturing process according to the present invention, and FIG. 2 is a sectional view of an adhesive spacer used in the embodiment. In this embodiment, a silica type spacer is used as the spacer, and an acrylic resin having an adhesion temperature of about 150 ° C. is used as the coating resin.

First, as shown in FIGS. 1 (a) and 1 (b), an electrode substrate made of glass or the like on which a treatment for aligning liquid crystal molecules is completed (a pattern is formed by transparent electrodes, but it is omitted in the drawing). Prepare 1 and 2,
The sealing material 3 is printed on one of the electrode substrates 1 by a screen printing method. Here, the sealing material 3 is provided with a liquid crystal discharge port 5 in advance. Adhesive spacers 4 are uniformly arranged on the other electrode substrate 2. Next, as shown in FIG. 1C, one drop or a few drops of the liquid crystal 6 is dripped at the substantially central portion of the portion surrounded by the sealing material 3 on the one electrode substrate 1. Then, after the excess liquid crystal is discharged from the liquid crystal discharge port 5, a sealing material 7 is applied to seal the liquid crystal.

At this time, the liquid crystal 6 is dropped by using a high-precision micro-dispensing syringe, a pipette, a constant-dispensing pump, or the like.
Add a little more than the amount used. Here, it should be noted that if the dripping place is too close to the sealing material 3, the liquid crystal 6 flows to the sealing portion before the electrode substrates 1 and 2 are bonded together, and when the electrode substrates 1 and 2 are bonded together. That is, the seal part is broken or the liquid crystal 6 overflows to the outside of the seal part. According to the present embodiment, liquid crystal injection and sealing can be performed in a short time,
Moreover, it was confirmed that a uniform cell gap could be easily obtained. Next, FIG. 2 will be described. Reference numeral 8 is a thermoplastic resin or thermosetting resin, and 9 is a spacer body. As shown in (a) and (b) by the heating action, the coated resin is melted or softened, and the effect of adhering and fixing to the electrode substrate can prevent the movement of the spacer due to the flow of liquid crystal.

[0014]

As described above, according to the present invention, by providing the liquid crystal discharge port in the seal portion on the electrode substrate and providing the spacer with adhesiveness, (1) liquid crystal injection / sealing can be performed in a short time. it can. (2) The contamination of liquid crystal and the mixing of dust are eliminated. (3) The liquid crystal can be easily manufactured without requiring the accuracy of the liquid crystal dropping amount. (4) By using an adhesive spacer, it is possible to prevent the movement of the spacer due to the flow of liquid crystal during dropping / bonding, and to obtain an excellent liquid crystal display device manufacturing method that can obtain a uniform cell gap. It can be realized.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a manufacturing process for explaining a manufacturing method of a liquid crystal display element in one embodiment of the present invention.

FIG. 2 is a sectional view of an adhesive spacer coated with a thermoplastic resin or a thermosetting resin in the example.

FIG. 3 is a conceptual diagram showing a manufacturing process for explaining a conventional liquid crystal display device manufacturing method (vacuum injection method).

FIG. 4 is a conceptual diagram showing a manufacturing process for explaining a conventional liquid crystal display device manufacturing method (liquid crystal dropping method).

[Explanation of symbols]

 1, 2 electrode substrate 3 sealing material 4 adhesive spacer 5 liquid crystal discharge port 6 liquid crystal 7 sealing material 8 thermoplastic resin or thermosetting resin 9 spacer body

Claims (2)

[Claims]
1. A sealing material having a liquid crystal discharge port is provided on at least one of two opposing electrode substrates, and a required amount of liquid crystal is dropped onto the electrode substrates, and then the two electrode substrates are vacuumed. A method for manufacturing a liquid crystal display element, which is characterized in that the liquid crystal is pasted and pressed to discharge excess liquid crystal from the liquid crystal discharge port.
2. An adhesive spacer coated with a resin is sprinkled on at least one of two opposing electrode substrates,
2. The method for manufacturing a liquid crystal display element according to claim 1, wherein the liquid crystal is dropped and liquid crystal is dropped and the two electrode substrates are bonded together in a vacuum, after being adhered and fixed to the electrode substrate by heating.
JP2226493A 1993-02-10 1993-02-10 Manufacture of liquid crystal display element Pending JPH06235925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2226493A JPH06235925A (en) 1993-02-10 1993-02-10 Manufacture of liquid crystal display element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2226493A JPH06235925A (en) 1993-02-10 1993-02-10 Manufacture of liquid crystal display element

Publications (1)

Publication Number Publication Date
JPH06235925A true JPH06235925A (en) 1994-08-23

Family

ID=12077916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2226493A Pending JPH06235925A (en) 1993-02-10 1993-02-10 Manufacture of liquid crystal display element

Country Status (1)

Country Link
JP (1) JPH06235925A (en)

Cited By (168)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703485A2 (en) 1994-09-26 1996-03-27 Matsushita Electric Industrial Co., Ltd. Liquid crystal display panel and method and device for manufacturing the same
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