JPH1114953A - Method of manufacturing multi-touch liquid crystal display panel and multi-touch liquid crystal display panel - Google Patents

Abstract

(57) [Problem] To provide a method of manufacturing a multi-touch liquid crystal display panel having a uniform cell gap and a good yield, and a multi-touch liquid crystal display panel. A first dummy seal (8) for uniforming a cell gap and a sealant (7) for sealing liquid crystal of a liquid crystal display panel are provided on an outer peripheral portion of one glass substrate (3).
Further, a second dummy seal 11 for improving cell gap accuracy is formed between the first dummy seal 8 and the sealant 7. Liquid crystal is dropped on the glass substrate 3. The glass substrate 3 and the other glass substrate 5 are bonded in a vacuum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a method for manufacturing a multi-panel liquid crystal display panel in which a plurality of units are formed in a single panel, and when separated and cut, each unit becomes a liquid crystal display panel in which liquid crystal is sealed. The present invention relates to a liquid crystal display panel.

[0002]

2. Description of the Related Art Today, liquid crystal display panels, which are used for many electric appliances including AV and OA equipments, are further advanced in terms of low voltage driving, low power consumption, thinness and light weight, as compared with conventional display devices. doing.

FIG. 3 is a sectional view of a general liquid crystal display panel. A first transparent electrode portion 2 is provided on one surface of the first glass substrate 3, and a second transparent electrode portion 4 is provided on one surface of the second glass substrate 5. The first glass substrate 3 and the second glass substrate 5 are bonded via a spacer 6 with a sealant 7 so that the first transparent electrode portion 2 and the second transparent electrode portion 4 face each other.

A space between the first glass substrate 3 and the second glass substrate 5 is filled with a liquid crystal 9, and a polarizing plate 10 is attached to both sides of the liquid crystal display panel 1 thus configured. .

In general, when producing the liquid crystal display panel 1 as described above, instead of manufacturing the liquid crystal display panel 1 one by one, a plurality of units are provided in a single panel in order to improve productivity. A method has been adopted in which a plurality of liquid crystal display panels are manufactured at a time by manufacturing and separating and cutting the liquid crystal display panels at once.
Hereinafter, such a panel having a plurality of units is referred to as a "many-chopped liquid crystal display panel".

FIG. 4 shows a conventional multi-touch liquid crystal display panel 1.
It is a top view of 3 and shows the example of 6 attachment. The first transparent electrode unit 2 is provided on one surface of the first glass substrate 3, and the second transparent electrode unit 4 is also provided on one surface of the second glass substrate 5.

On the first glass substrate 3 on which the first transparent electrode portion 2 is provided, a sealing agent 7 for enclosing the liquid crystal 9 in the liquid crystal display panel 1 after separation and cutting is applied to the entire display portion for each unit. It is applied to surround. Further, a first dummy seal 8 for making the cell gap uniform is formed on the outer peripheral portion of the first glass substrate 3.

[0008] A required minimum amount of liquid crystal 9 is dropped onto the first glass substrate 3 thus configured, and the first glass substrate 3 and the second glass substrate 5 are bonded together in a vacuum to form a liquid crystal display panel. 13 is produced. And dashed lines 14 and 15
In the case of the liquid crystal display panel 13 with many nails shown in FIG. 4, six liquid crystal display panels 1 are manufactured by separating and cutting along the line indicated by.

The liquid crystal display panel 1 as described above has AV,
In addition to OA equipment and other appliances, in recent years OA
The demand for the equipment field is increasing, and the size is increasing. Along with this, uniform display quality is required over the entire surface. For example, a liquid crystal display panel, such as an STN type liquid crystal display panel, in which the display quality and the viewing angle are improved by increasing the twist angle of liquid crystal is practical. Has been

[0010]

However, when the twist angle of the liquid crystal is increased, color unevenness (non-uniformity of display) occurs due to polarization characteristics unless the cell gap of the liquid crystal display panel is made uniform. However, there is a problem that display quality is not improved.

The above-mentioned conventional multi-touch liquid crystal display panel 13
In (2), a first dummy seal 8 is formed on the outer peripheral portion of the first glass substrate 3 in order to make the cell gap uniform. The first dummy seal 8 is formed by the difference between the vacuum state inside the liquid crystal display panel 13 and the normal pressure outside.
The cell gap is formed when the first glass substrate 3 and the second glass substrate 5 are bonded to each other.

However, since only the first dummy seal 8 formed on the outer peripheral portion of the first glass substrate 3 generates a stress difference that suppresses each part of the first glass substrate 3 and the second glass substrate 5, a large number of nails are attached. The liquid crystal display panel 13 has a problem that the entire cell gap becomes non-uniform.

An object of the present invention is to solve the above-mentioned problems and to provide a method of manufacturing a multi-touch liquid crystal display panel having a uniform cell gap and a good yield in a multi-touch liquid crystal display panel. With the goal.

[0014]

The present invention is characterized in that first and second dummy seals are provided. According to the present invention, the cell gap can be made uniform in a multi-touch liquid crystal display panel, a liquid crystal display panel with good display quality can be manufactured, and the yield can be improved.

[0015]

According to a first aspect of the present invention, there is provided a method of manufacturing a multi-panel liquid crystal display panel, wherein a single panel is formed by dropping liquid crystal on one glass substrate and then bonding the other glass substrate. In manufacturing a liquid crystal display panel in which a large number of units are formed by separating and cutting this panel to form a liquid crystal display panel in which liquid crystal is sealed, before the bonding, the glass substrate is used. A first dummy seal for uniforming a cell gap on an outer peripheral portion of the liquid crystal display; a sealant for enclosing liquid crystal of each liquid crystal display panel after the separation and cutting; a first dummy seal and the seal; A second dummy seal for improving cell gap accuracy is formed between the substrate and the agent, and then a single panel having a plurality of units formed by laminating two glass substrates is formed. Characterized in that it formed.

According to this structure, the first dummy seal is provided on the outer peripheral portion of the glass substrate, and the second dummy seal is formed between the first dummy seal and the sealant, thereby making the cell gap uniform. it can. As a result, the occurrence of color unevenness in the liquid crystal display panel is suppressed, and the yield is improved.

According to a second aspect of the present invention, there is provided a liquid crystal display panel in which a plurality of glass substrates are bonded to each other. What is claimed is: 1. A multi-panel liquid crystal display panel comprising a plurality of units forming a display panel, wherein a second gap between the two glass substrates is provided for uniforming a cell gap provided on an outer peripheral portion of the glass substrates. A dummy seal, a sealant provided for each unit, for enclosing liquid crystal of each liquid crystal display panel after separation and cutting, and a cell provided between the first dummy seal and the sealant. A second dummy seal for improving the accuracy of the gap is provided.

According to this configuration, a large number of liquid crystal display panels can be manufactured at a time only by dividing and cutting a large number of liquid crystal display panels, thereby improving the yield. Further, the obtained liquid crystal display panel has a constant cell gap and excellent display quality.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. Note that components having the same functions as those in FIGS. 3 and 4 showing the conventional example are denoted by the same reference numerals. (Embodiment 1) FIGS. 1 and 2 show (Embodiment 1) of the present invention.

FIG. 1 shows a structure substantially similar to that of the conventional multi-touch liquid crystal display panel 13 except that the first dummy seal 8 is provided.
The difference is that a second dummy seal 11 is formed between the second dummy seal 11 and the sealant 7.

As shown in FIG. 1, the second dummy seal 11
Are provided so as to divide between the six units formed on the liquid crystal display panel 13 with a large number of attachments. The liquid crystal display panel 13 thus configured is cut and separated by the lines indicated by broken lines 14 and 15, and six liquid crystal display panels 1 are manufactured.

The liquid crystal display panel 1 manufactured in this (Embodiment 1) and the liquid crystal display panel 1 obtained by separating and cutting the conventional multi-touch liquid crystal display panel 13 shown in FIG. The display quality was compared by color unevenness.

As a guideline of the evaluation, a gap value of six liquid crystal display panels 1 manufactured by each manufacturing method was measured. The measurement of the gap value was performed at the central part to each unit as shown in FIG.

As a result, in the liquid crystal display panel 1 manufactured by the conventional method, a cell gap variation of ± 0.1 to 0.15 μm occurred. In the liquid crystal display panel 1 in the first embodiment, Control of the cell gap within ± 0.1 μm became possible.

As described above, in the first embodiment, it is possible to obtain a uniform gap which is more uniform than ever before, and it is possible to significantly improve the display quality. As a result, the yield can be improved, and the cost can be reduced by reducing the work time. (Embodiment 2) Although the gap of the liquid crystal display panel 1 in the above (Embodiment 1) shows sufficient uniformity, in this (Embodiment 2), the gap uniformity is further improved. Therefore, a third dummy seal is added.

The third dummy seal is provided to increase the number of columns for forming a gap, and its arrangement position does not affect the liquid crystal display panel 1.
When a large number of attached liquid crystal display panels 1 are cut, it is desirable to dispose them at the corners where they can be disposed together with the ear glasses. The size and shape are not particularly limited, and can be appropriately selected according to the size of the liquid crystal display panel 1 and the like.

For example, as a method for effectively adding the third dummy seal in FIG. 1 described above, the third dummy seal can be provided at both inner ends of at least one of the first dummy seal 8 and the second dummy seal 11. At this time, the shape of the third dummy seal 12a is most preferably circular.

In addition to the configuration of the first embodiment, a third
By adding the dummy seal 12a, the cell gap measured in the same manner as described above can be controlled within ± 0.05 μm.

Further, a linear third dummy seal 12b may be added to the outer peripheral portion of the first dummy seal 8. With such a configuration, the cell gap can be improved. Note that the third dummy seal 12b is not limited to the outer periphery of the first dummy seal, but may be another blank portion.

That is, by adding not only the second dummy seal 11 but also the third dummy seals 12a and 12b as appropriate, the accuracy of the cell gap can be increased, better display quality can be obtained, and the yield can be further improved. be able to.

In each of the above embodiments, the sealant 7, the first dummy seal 8, the second dummy seal 11, and the third dummy seals 12a and 12b are formed by a printing method, a drawing method, or a combination of these methods. It is common to form.

[0032]

As described above, according to the method of manufacturing a multi-touch liquid crystal display panel of the present invention, before bonding the glass substrates, the first dummy seal is provided on the outer peripheral portion of the glass substrate. By forming the second dummy seal between the seal and the sealant, the cell gap of each liquid crystal display panel after being separated and cut becomes uniform, and the yield is improved.

Further, since the cell gap is uniform, the occurrence of color unevenness is suppressed and the display quality is excellent. Further, in the present invention, by providing a third dummy seal in addition to the above configuration, the cell gap becomes more uniform,
The display quality is improved, and the yield is accordingly improved.

[Brief description of the drawings]

FIG. 1 is a top view of a liquid crystal display panel with a large number of holes in Embodiment 1;

FIG. 2 is a diagram showing a measurement point of a gap in (Embodiment 1);

FIG. 3 is a top view of a conventional liquid crystal display panel having a large number of holes.

FIG. 4 is a side view of a general liquid crystal display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 3 1st glass substrate 5 2nd glass substrate 7 Sealant 8 1st dummy seal 9 Liquid crystal 11 2nd dummy seal 12a, 12b 3rd dummy seal 13 Many liquid crystal display panels

Claims (2)

[Claims] 1. A single panel formed by dropping a liquid crystal on one glass substrate and bonding the other glass substrate to each other, separating and cutting the panel to form a liquid crystal in which liquid crystal is sealed. A first dummy seal for uniforming a cell gap on an outer peripheral portion of the glass substrate before the bonding, when manufacturing a multi-panel liquid crystal display panel in which a plurality of units to be a display panel are formed; A sealant for enclosing the liquid crystal of each liquid crystal display panel after the separation and cutting, and a second dummy seal for improving cell gap accuracy between the first dummy seal and the sealant. And then bonding two glass substrates to form a single panel in which a plurality of units are formed. 2. A large number of units in which a single panel formed by laminating two glass substrates is separated and cut to form a plurality of units each of which becomes a liquid crystal display panel in which liquid crystal is sealed. A liquid crystal display panel, wherein a first dummy seal for uniforming a cell gap provided on an outer peripheral portion of the glass substrate is provided between the two glass substrates, and a first dummy seal is provided for each of the units. A sealant for enclosing the liquid crystal of each liquid crystal display panel after separation and cutting, and a second dummy provided between the first dummy seal and the sealant for improving the accuracy of the cell gap. A large number of liquid crystal display panels with seals.