JPH01265230A - Manufacture of liquid crystal display cell - Google Patents

Abstract

PURPOSE:To prevent inner air bubbles from being formed by injecting liquid crystal from one injection hole or two right and left injection holes which are symmetrical about a center line corresponding to the width of a liquid crystal cell. CONSTITUTION:When the width L of the liquid crystal cell 1 is <=100mm, the liquid crystal is injected from one injection hole 5 of 4mm in width I. When the width L of the liquid crystal cell 11 is >=100mm and <=120mm, the liquid crystal is injected from two right and left injection holes 15 and 16 of 6mm in width I which are symmetrical about the center axis and at a 30mm distance l. Further, when the width L of the liquid crystal cell 21 is >=120mm and <=160mm, the liquid crystal is injected from right and left symmetrical injection holes 25 and 26 which are at a 45mm distance l. Thus, the reference of the injecting method is determined correspondingly to the cell width to prevent inner air bubbles which are generated on the opposite side of the injection holes from being formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a liquid crystal display cell, and more particularly to a method for injecting liquid crystal between electrode substrates.

[Conventional technology]

Recently, liquid crystal display devices are being used in word processors, personal computers, and the like. This type of liquid crystal display device is composed of large liquid crystal display cells.

In the manufacture of large-sized liquid crystal display cells, as shown in FIG.
3, or as shown in FIG. 5, a method of injecting from one injection port 14 provided at the center of one side of the seal pattern 12, etc. have been used.

[Problem to be solved by the invention]

When liquid crystal is injected between electrode substrates, if the liquid crystal display cell is large, deep bubbles are likely to occur. For example, in the method shown in FIG.
A deep bubble shaped like a "," is generated in the partition part 15 of the second part. This is because the liquid crystal flows radially from the inlet 13 at the corner of the cell, as shown. In addition, in the method shown in FIG. 5, since the liquid crystal flows radially from the injection port 14 at the center of the seal pattern 12, "-"-shaped deep bubbles are formed at both corner portions 16 and 17 of the seal pattern facing the injection port 14. occurs. However, in this case, if the size of the deep bubble is slightly smaller than that in the method shown in Figure 4, and if the cell width is below a certain level,
There are no inner bubbles (no bubbles are generated).

The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for manufacturing a liquid crystal display cell that prevents the generation of deep bubbles.

[Means to solve the problem]

In order to achieve the above object, in the method for manufacturing a liquid crystal display cell according to the present invention, standards for the injection method are determined in accordance with the width of the liquid crystal display cell. If the width of the liquid crystal display cell is smaller than a predetermined value, injection is performed from one injection port in the center of the injection port forming edge. When the width of the liquid crystal display cell is larger than a predetermined value, injection is performed from two injection ports located symmetrically from the center.

[Effect]

In the method for manufacturing a liquid crystal display cell according to the present invention, liquid crystal is injected from one or two locations corresponding to the width of the liquid crystal display cell. In this way, by setting the criteria for the injection method in accordance with the width of the cell, the generation of deep bubbles can be prevented.

〔Example〕

FIG. 1 shows an example of the number and position of injection ports determined in accordance with the width of a liquid crystal display cell. fa) has one injection port, and (b) and (C) have two injection ports. In the figure, 1
, 11.21 is a liquid crystal display cell, 2.3°12.13,2
2.23 is the upper and lower electrode substrates, 4° 14.24 is a sealing material, and 5, 15.16, 25° 26 is an injection port.

In the example shown in FIG. 1(a), the width of the liquid crystal display cell 1 is 1
Since the width is less than 0.00 mm, the liquid crystal is injected from one injection port 5 provided at the center of the lower side 4a of the sealing material 4. The width of this injection port 5 is 4 mm.

In the example shown in FIG. 1 (bl), the width of the liquid crystal display cell 110 is 100 mm or more and less than 120 mm.
Liquid crystal is injected from two injection ports 15 and 16 provided on the lower side 14a of the . The width I of this injection port 15.16 is 6
It's a dragon. The two inlets 15 and 16 are connected to the liquid crystal display cell 1.
1, and this axis of symmetry CL
The distance l between the injection port 15 and the injection port 15 and 16 is 30 mm.

In the example shown in FIG. 1 (C1), the width of the liquid crystal display cell 21 is 120 mm or more and less than 160 mm. The injection ports 25 and 26 are formed at positions symmetrical to the central axis of the liquid crystal display cell 21, and are aligned with the axis of symmetry CL.
and the inlet 25.26 is 45 mm. The inlets 25, 26 each have a width I of 6 square l.

As described above, by appropriately determining the number of injection ports and the positions of the injection ports in accordance with the width of the liquid crystal display cell, liquid crystal can be injected without generating deep bubbles. The width is 10 (bm)
When no grooves are formed, even if liquid crystal is injected from a single injection port formed at the center of one side of the sealing material, no deep bubbles are generated because the cells are small. Cell width is 100 dragons or more 16
When the temperature is less than 0, by injecting from two injection ports, the liquid crystal flows evenly as shown in FIG. 2, and no deep bubbles are generated. 2 if the cell width is 10 (bm or more)
The distance from the central axis of the cell to the injection port provided at the location is
It is necessary to change it according to the width of the liquid crystal display cell, and when the cell width is 10 (lss or more and less than 120), the distance l
is 3 (bm), and when the cell width is 12 (in or more and less than 160 yen), the distance β is 45 yen.

Figure 3 shows the width of the cell and the distance M of the injection port from the central axis of the cell.
The relationship between L/21 and L/2 is 1.67~2 and 1.33~ for cell widths of 100 or more and less than 120 and 120 or more and less than 160, respectively.
It is 1.78, which is about the same level. From this, even when the cell width is 160+n or more, the positions of the two injection ports can be determined using the same method.

〔Effect of the invention〕

As explained above, in the present invention, the number of liquid crystal inlets is one or two depending on the width of the liquid crystal display cell,
Further, by setting the two liquid crystal injection ports at predetermined positions, no deep bubbles are generated when liquid crystal is injected, and it is possible to improve the yield in manufacturing liquid crystal display cells.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the structure of a liquid crystal display cell to which the present invention is applied, FIG. 2 is a diagram explaining the present invention in detail, and FIG. 3 is a diagram showing the cell width and injection port position of an embodiment of the present invention. Figures 4 and 5 showing the relationship are diagrams explaining the operation of the conventional example. 1.11.21...Liquid crystal display cell 2.12.22, 3, 13.23... Electrode substrate 4.1
4.24...Sealing material 5.15, 25, 16.26...Inlet patent applicant
Sharp Corporation Representative Patent Attorney Nishi 1) Arata

Claims (1)

[Claims] (1) In a method for manufacturing a liquid crystal display cell in which liquid crystal is injected from an injection port formed at one edge of an electrode substrate, the liquid crystal display cell is symmetrical on or along the center line of the one edge in accordance with the width of the liquid crystal display cell. A method for manufacturing a liquid crystal display cell, comprising injecting liquid crystal from one or two injection ports determined at positions.