JPS59172676A - Plastic cell for liquid crystal display element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cell for sealing liquid crystal used in a liquid crystal display element.
The present invention relates to a method for simultaneously manufacturing an unlimited number of planutic liquid crystal display cells.

BACKGROUND ART Conventionally, liquid crystal display elements have been used in which a liquid crystal is sealed in a cell using a glass substrate coated with a transparent conductive film such as soot oxide or indium oxide. When this element is stored in a stationary case like a pocket calculator, it has the disadvantage that it is easily torn by external force.In addition, when a reflection root is provided on the back of the cell to make it a reflective element, if the base of the back is thick, This results in a so-called double image in which the displayed image is shifted between the display surface and its shadow, resulting in a disadvantage that the display quality is degraded.

In order to improve this drawback, it is necessary to reduce the thickness of the back substrate, but when using a glass substrate, the higher the price and the thinner the substrate, the more easily it breaks and is difficult to handle, which lowers the manufacturing yield.

On the other hand, plastic films with a thickness of about 100 μm are generally commercially available, are cheap and do not easily tear, so plastic substrates are better than glass substrates in terms of display appearance, price, resistance to tearing, thinner elements, and lighter weight. is considered more advantageous.

Conventionally, when manufacturing liquid crystal cells using glass substrates, a method has often been adopted in which multiple cells are simultaneously formed on the same substrate from the viewpoint of mass production. Patterning treatment to form the necessary pattern, alignment film coating to arrange the liquid crystals in a clear manner and obtain a viewing angle in a predetermined direction, alignment treatment such as rubbing the surface with cloth, printing a seal to create a peripheral phase, and the back side. 'Kj 4j
+・'(t;: jHl) Printing of conductive paste etc. to draw out to i6 electrode, alignment process to match the pattern of front side electrode and base electrode ib, , &, gap between front side electrode and mourning m1 electrode 1b'' It is manufactured through a crimping process to compress the material to a predetermined gap.

However, when many of these processes are carried out using plastic nac film, the film is thin and lacks rigidity, and for handling reasons, for example, many processes require vacuum fixation to fix the base plate. This caused problems such as only the vacuum hole was recessed, making it impossible to perform printing or coating processes, and alignment was not possible because it was not flat. In addition, when the film is made into a plate-like material using Nori-Misaki, foaming occurs during heat treatment during the process, and it is difficult to separate the film from the plate-like material after it is made into cells, resulting in stains on the outside of the cell. There were flaws.

As a result of extensive research to solve the above-mentioned problems, the present invention was developed by using a rigid plate-like body and electrically charge-bonding a glass substrate to the plate-like body to integrate the plate-like body and attaching it to the plate. After going through various handling steps to form cells, it can be easily separated and has the advantage of not leaving any traces on the cell surface.

The plate-shaped body of the present invention is used to hold a plastic substrate, and it only needs to be rigid and can be kept flat during handling, and may be made of materials such as glass, metal, or plastic. , the plastic substrate is integrated with the electrically charged nyoυ junction.

After the process is completed, the electricity can be released and the glass substrate can be easily peeled off from the plate.

Next, the present invention will be explained with reference to examples.

FIG. 1 is a sectional view of the band t of the present invention and the mounting used for joining. α) is grounded with a metal plate, (4J is a glass used as a holding plate, and (5) is a glass substrate coated with a 4'a=+ film with a conductive jIA surface. It is facing upward. (8) is a reference bottle, which is used to align the edge of the plate-shaped body and the end face of the plastic substrate, and is integrated with the power visiting body (2) made of neoprene rubber, etc., and is installed at three points. (6) is the electrode used for charging, which can be needle-shaped or wire-shaped. (7) is a DC power supply that applies Akane%7 voltage to (6), and is connected to (6) with a flexible connector. )
Connected to the electrode! Stay at 1. (2) is an electric body that does not fall directly to the ground, and may be made of, for example, neoprene rubber for one or two gourds. (Place the plate-shaped body (1) and the conductive film (5) so that they both touch the reference bottle (8), apply frost and pressure, and move it in the direction of the arrow.) The substrate and the plate-shaped body (4) are electrically attracted to each other at the interface and are joined.

Ru. Even if the entire plate is taken out and pattern printed using acid-resistant resist, coated with photoresist, and roll coated, the glass plate and plastic substrate do not separate, and conventional glass equipment is sufficient. Processing was possible. The glass substrate, which has undergone so-called wet processing such as the etching process to remove the partially transparent film after pattern formation and the process of peeling off the resist, is bonded to the glass again using the above method and coated with an alignment film. and subjected to orientation treatment. As a result, it was possible to handle it in the same way as handling a single sheet of glass. Furthermore, the process progresses, including seal printing to apply peripheral sealing material, transfer printing to print conductive paste to draw the back electrode to the front electrode, alignment processing to match the patterns of the back electrode and front electrode, and the back electrode. A pressure bonding process was carried out to create a predetermined gap between the surface electrodes by using a rigid glass plate. on the other hand,
After the crimping is completed, the plastic cell used for the holding plate can be separated from the plastic cell by peeling it off without leaving any traces on the surface, as the plastic substrate side is flexible. was completed. In addition, the separated crow could be used again as a plate for a new plastic substrate.

In addition, the materials for the plastic snack film of the plastic substrate coated with the transparent box 1 conductive film include polyester,
Polycarbonate, acetyl cell 0-. 1. , ho')
Sulfon, polyether sulfon...Φ...
In addition to the thick materials mentioned above, thick plastic plates such as polyvinyl chloride, Teflon, polyethylene, polypropylene, etc., and metal plates can also be used as holding plates. good.

Also, in the above explanation, the entire process from resist pattern printing to sealing was handled by integrating the holding plate and the plastic substrate, but only some of these processes can be handled using this method. Alternatively, this handling may be carried out up to the step of attaching a polarizing plate filter, a reflecting plate, etc. after sealing.

Although this +tp was not specifically shown in the above explanation, the outer surface of the plastic substrate is pasted with a polarizing plate for printing characters, the inner surface (・5i02.Al
Two layers of electrodes forming an undercoat layer such as 2O3, making the Urasen electrode a reflective electrode, dispersing spacers in the plane, forming a seal part in the plane, type of alignment film or 1 This method can be applied as a method for manufacturing a cell for a liquid-side display element, such as by changing the orientation to form an 11 constant display area, or by mixing a dichroic dye into a liquid dye.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a second embodiment of the present invention. 1...metal plate 2...Dielectric material 3...Reference pin 4...Plate body 5...Plastic substrate coated with transparent leading film 6... Charging electrode 7...DC sink, source

Claims (1)

[Claims] (1)' 4 In a method for manufacturing a cell for a liquid crystal display element, in which plastic substrates coated with a surprising film are stacked together via a sealing material and liquid crystal is inserted, the plastic substrates are formed into a rigid plate-like body. A manufacturing method for plastic liquid crystal display element cells, which is characterized by being integrally bonded and handled by Teito.