JPS60238816A - Production of liquid crystal display body - Google Patents

Abstract

PURPOSE:To permit easy adhesion of polarizing plates to a liquid crystal cell for which plastic film substrates formed thereon with many electrodes are used by adhering the polarizing plates to said plastic film substrates then cutting the substrates to individual cells. CONSTITUTION:Common electrodes are formed on the common side substrate consisting of the plastic film and the same number of segment electrodes are formed on the segment side substrate. An orienting agent 7 is coated on both substrates and is subjected to an orientation treatment after calcination. The substrates are then subjected to a treatment to provide conductivity between the upper and lower substrates by screen printing of a sealant 5 and thereafter fine glass fiber powder 6 is sprayed on the surface. The sealant is heated to cure after both substrates are combined. The upper polarizing plate 9 and the lower polarizing plate 10 are adhered to the liquid crystal cells a large number of which are simultaneously assembled. The entire part thereof is then cut and separated to the cell units. A liquid crystal is vacuum-injected into each cell and the injection port is sealed by an adhesive agent. An aluminum reflecting plate is attached to the lower side of the panel.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method of manufacturing a liquid crystal display having polarization ability using a flexible substrate.

<Prior art> In place of a liquid crystal display using a conventional glass substrate,
Attempts have been made to manufacture lightweight, thin, and flexible liquid crystal displays using a thin plastic film of about 800 μm as a substrate material.

A normal twisted nematic type liquid crystal display requires a liquid crystal cell consisting of two substrates sandwiching a liquid crystal layer, and polarizing plates above and below the liquid crystal cell, but it is easier to mount the polarizing plate if it is fixed to the liquid crystal cell. It is easy and is usually attached to the liquid crystal cell using an acrylic adhesive or a silicone adhesive. However, when attaching a polarizing plate to a liquid crystal cell made of a plastic film substrate by this method, the thinner the polarizing plate is used, the more difficult the work becomes, and the attachment sometimes destroys the liquid crystal cell.

Purpose> The present invention solves these drawbacks, and its purpose is to
The object is to facilitate the attachment of a polarizing plate to a liquid crystal cell using a plastic film substrate.

Summary of the Invention The present invention is capable of producing a large number of liquid crystals with polarizing plates by assembling plastic film substrates on which a large number of electrodes are formed, attaching polarizers at the same time, and then cutting them individually. This is a method of manufacturing a display body.

At this time, in order to expose the terminal part of the liquid crystal display, one side of the common electrode board facing the terminal part of the segment electrode board is cut in advance (this process is called the primary cutting process), and the two boards are cut. After assembling and pasting a large number of polarizing plates at the same time, they are individually cut (this cutting process will be referred to as the secondary cutting process). At this time, it is necessary to position the polarizing plates, which have been cut at locations corresponding to the primary cutting locations, so that the -order cutting locations coincide with each other, and then bond them together.

For these cutting methods, a method of cutting with a blade such as a knife, a method of cutting by shearing, a method of cutting with a press, a method of cutting with a laser, etc. can be used.

In addition, the polarizing plate is made by dyeing polyvinyl alcohol with iodine or dichroic dye and coating it with cellulose triacetate or acrylic resin.
A piece of 80 μm thick is used, and this is pasted using an acrylic adhesive or a silicone adhesive. An aluminum reflective plate may be attached to the polarizing plate attached to the common electrode substrate side.

<Example> Next, the present invention will be explained based on examples.

(Example 1) FIG. 1 shows the layout of the electrode pattern of the present invention.

A polyether sulfonate film having a thickness of 100 μm and a size of 20 crn square was used as the plastic film substrate 1, and an indium tin oxide film, which was a transparent conductive film 2, was formed to a thickness of 50 OA by low-temperature sputtering. Next, as shown in FIG. 1, the same number of common electrodes were formed on the common side substrate (α) and the same number of segment electrodes were formed on the segment side substrate by the photoringraph method. Furthermore, the primary cutting location 3 in FIG. 1(b) was cut with a cutting blade. Next, the alignment agent 7 was applied to both substrates, baked, and then rubbed in a predetermined direction with gauze for alignment treatment. Next, an epoxy sealant 5 was screen printed, and after vertical conduction treatment was performed, fine glass fiber powder 6 was sprinkled on the surface, and after the side substrates were assembled, the sealant was heated and cured. As shown in Fig. 2, the upper polarizing plate 8 and the lower polarizing plate 9 cut at the locations corresponding to the primary cutting locations are attached to the liquid crystal cell, which has been assembled in large numbers at the same time. Next, it was cut 4 and separated into individual cells. Liquid crystal was vacuum injected into this, the injection port was sealed with epoxy adhesive, and an aluminum reflector was attached to the bottom of the panel to complete the liquid crystal display.

(Example 2) As in Example 1, a large number of liquid crystal cells were assembled at the same time, and as in Example 1, the upper light body and the aluminum reflector, which had been cut in advance at a location that corresponds to the next cutting location, were After attaching a lower polarizing plate with a plate, the whole was cut into secondary cuts and separated into individual cells.

Liquid crystal was vacuum injected into this, and the injection port was sealed with epoxy adhesive to complete the liquid crystal display.

(Example 3) In the same manner as in Example 1, a large number of upper polarizing plates were attached at the same time as shown in Figure 4 to a large number of liquid crystal cells assembled at the same time, and then a pre-cut lower polarizing plate with aluminum was attached. After pasting, the whole was cut into secondary cells and separated into individual cells. Liquid crystal was vacuum injected into this, and the injection port was sealed with epoxy adhesive to complete the liquid crystal display.

(Example 5) A first substrate (α) and a second substrate ( Regarding b), a continuous pattern of common electrodes and segment electrodes was formed. Furthermore, the primary cut location shown in FIG. 5 was cut with a cutting blade. After assembling this in the same manner, the upper and lower substrates, which had been previously cut at points corresponding to the secondary cutting points, were attached as shown in FIG. 6, and then the whole was subjected to secondary cutting.

Liquid crystal was injected into this, the injection port was sealed, and an aluminum reflector was attached to the bottom of the panel to complete the liquid crystal display.

(Example 6) As shown in FIG. 7, the first substrate (a,) and the second substrate (b
), common electrodes and segment electrodes were formed. Next, after cutting the primary cut points shown in Fig. 7, the parts were assembled in the same manner. Next, the upper and lower substrates, which had been previously cut at locations corresponding to the primary cutting locations, were pasted together as shown in FIG. 8, and the whole was then subjected to secondary cutting.

(Example 7) As shown in Fig. 9, common electrodes and segment electrodes were formed on the first substrate (b) and the second substrate (b).Next, the primary cutting points in Fig. 9 were cut, and the same process was carried out. Next, the upper and lower substrates, which had been cut in advance at locations corresponding to the primary cutting locations, were pasted together as shown in Figure 1fJ, and the whole was then subjected to secondary cutting.

Effect> As described above, according to the present invention, it is easy to attach a polarizing plate to a liquid crystal cell using a plastic film substrate,
It has the advantage of reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 shows the first embodiment of the present invention. Second. 8th. The layout of the electrode pattern in the fourth embodiment is shown. Figure 2 is a cross-sectional view of the first embodiment with a polarizing plate attached, and Figure 8 is a cross-sectional view of the second embodiment.
FIG. 4 shows a sectional view of the third embodiment with a polarizing plate attached thereto, and FIG. 4 shows a sectional view of the third embodiment with a polarizing plate attached. Furthermore, FIG. 5 shows the layout of the electrode pattern in the fifth embodiment, FIG. 4 shows a cross-sectional view of the fifth embodiment with the polarizing plate attached, and FIG. 7 shows the implementation of the method shown in FIG. The layout of the electrode pattern in this example is shown in FIG. 8, and FIG. 8 is a sectional view showing the state in which a polarizing plate is attached in the sixth example. FIG. 9 shows the layout of the electrode pattern in the seventh embodiment. FIG. 1o shows a cross-sectional view of the seventh embodiment with a polarizing plate attached thereto. 1・φ・Film substrate 2...Transparent electrode 3...-Next cutting location 4...Secondary cutting location 5 * * * Sealing agent 6... Gap agent 7... Alignment film 8... Polarizing plate Applicant Epson Corporation Agent Patent Attorney Mogami Mogami Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] A method for manufacturing a liquid crystal display having polarization ability using flexible substrates, which comprises simultaneously assembling a large number of upper and lower substrates, pasting a polarizer on them, and then cutting them individually.