JPH10170879A - Liquid crystal display panel, and its manufacturing equipment and manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display panel that is stabilized in product quality, and its manufacturing device and manufacturing method, by preventing squeegee material quality and squeegee pressure in a conventional polarizing plate sticking process from giving mechanical damage to the liquid crystal display panel. SOLUTION: This PL(polarizer) mounter 10 consists of a squeegee main body 11, a support lever 12 supported rotatably on a squeegee main body 11, an air cylinder 14 which apples a pressing force to the support lever 12, a compression coil spring 20 arranged between the support lever 12 and an arm 13, a support shaft 15, which rotates the arm 13, a squeegee blade 21 fitted to the arm 13 with a screw 17, and the liquid crystal display panel 1. This squeegee blade 21 is formed of a resin and the compression coil spring 20 makes the squeegee pressure soft to evade mechanical damage to the liquid crystal display panel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel and an apparatus and method for manufacturing the same, and more particularly, to a liquid crystal display panel.
A polarizing plate sticking device (hereinafter, referred to as a polarizing plate sticking device) for sticking a polarizing plate or the like on a substrate.
The present invention relates to a liquid crystal display panel that stabilizes product quality by improving a dust removal process in a “PL (Polarizer) mounter”, and a manufacturing apparatus and a manufacturing method thereof.

[0002]

2. Description of the Related Art A liquid crystal display panel is characterized by its flat structure and low power consumption, and has been put to practical use in electronic equipment with a liquid crystal display panel typified by a liquid crystal projector and a video camera with a liquid crystal monitor, and a television. . FIG. 2 is a diagram showing a basic configuration of a liquid crystal display panel according to the present invention. The liquid crystal display panel 1 in the figure is generally constituted by a counter substrate 2 and a driving substrate 3.

The counter substrate 2 is not shown in the figure, but in the case of a color liquid crystal panel, R, G, and B color filters, a transparent electrode 2A such as ITO (Indium-Tin Oxide) and an alignment film 2B are made of polyimide. And so on.
Scanning lines and signal lines that are insulated from each other are formed on the driving substrate 3, and thin film transistors (not shown) for driving each pixel are formed at intersections thereof, and a transparent electrode 3 </ b> A and an alignment film 3 </ b> B are formed. It is formed similarly. A liquid crystal display panel having such a structure is called an active matrix type. The liquid crystal display panel to which the present invention is applied is not limited to this structure, but is merely an example.

After the opposing substrate 2 and the driving substrate 3 are manufactured in respective manufacturing steps, for example, a sealing material 4 including a spacer (not shown) is applied to the opposing substrate 2 in a screen printing step, and then the UV By curing, the liquid crystal 5 is bonded to each other at a predetermined interval, and the liquid crystal 5 is injected from an injection hole (not shown). Thereafter, the process proceeds to a polarizing plate attaching step, in which a polarizing plate (not shown) is attached to both surfaces of the substrate by a PL mounter described later, and the liquid crystal display panel 1 is completed.

[0005] FIG. 3 illustrates the PL mounter 10 in the apparatus for manufacturing a liquid crystal display panel, and describes a conventional polarizing plate sticking step for a liquid crystal display panel. The PL mounter 10 includes a squeegee main body 11, a support rod 12 rotatably supported by the squeegee main body 11, and an air cylinder 14 for applying a pressing force to the arm 13 via the support rod 12. Arm 1
3 receives the pressing force from the air cylinder 14 and receives the support shaft 15.
To apply a pressing force to the substrate to be processed. A cutter blade 16 is attached to a tip of the arm 13 as a squeegee by a screw 17 or the like.

[0006] The liquid crystal display panel 1 as a substrate to be processed.
Is positioned and fixed on a stage (not shown), and the arm 13 is moved by a driving means (not shown) while applying a pressure of 3 to 4 kg to the cutter blade 16 with the air cylinder 14 and keeping the squeegee angle approximately 30 °. By moving in the direction A, dust on the liquid crystal display panel 1 is removed. After that, a polarizing plate (not shown) cut to each panel size is brought, placed on the liquid crystal display panel 1, and uniformly adhered by a roller or the like.

As shown in FIG. 3, a conventional squeegee cutter blade 16 is used in the conventional polarizing plate sticking process for the liquid crystal display panel 1, and the pressing force of the cutter blade 16 is directly proportional to the dust removing ability. Will do. Therefore, in order to enhance the ability to remove dust on the panel surface, the pressing force from the air cylinder 14 must be increased (see the current 3).
押 4 kg), which may cause mechanical damage to the liquid crystal display panel 1.

In the conventional PL mounter 10, since the pressing force of the air cylinder 14 is transmitted to the arm 13 as it is, it is difficult to adjust the pressing force, and the liquid crystal display panel 1 is easily damaged. Such mechanical damage to the liquid crystal display panel 1 not only causes a partial alignment abnormality (domain) in the liquid crystal display panel 1, but also significantly lowers the production efficiency of the liquid crystal display panel 1,
There is a problem that the manufacturing cost is increased.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the problem that the squeegee material and the squeegee pressure in the conventional polarizing plate attaching process cause mechanical damage to the liquid crystal display panel. It is an object of the present invention to provide a liquid crystal display panel and a manufacturing apparatus and a manufacturing method for the liquid crystal display panel, which avoid the problem and stabilize product quality.

[0010]

In order to solve the above-mentioned problems of the present invention, the following means have been taken. That is, the apparatus for manufacturing a liquid crystal display panel according to the present invention is a manufacturing apparatus for a liquid crystal display panel including a polarizing plate sticking means for sticking a polarizing plate on a substrate, wherein the squeegee blade used for dust removal of the polarizing plate sticking means is provided. The material is an aromatic polyamide resin whose tip is machined at an acute angle. As the aromatic polyamide resin, those having conductivity are preferable, and for example, OILES Aramid (trade name) is exemplified. Further, by controlling the pressing force of the squeegee blade by an elastic means provided in conjunction with the squeegee blade, mechanical damage to the liquid crystal display panel is avoided.

The method of manufacturing a liquid crystal display panel according to the present invention is directed to a method of manufacturing a liquid crystal display panel having a polarizing plate sticking step of sticking a polarizing plate on a substrate. The method includes a step of using an aromatic polyamide resin whose part is processed into an acute angle, and an elastic step of softening the pressing force of the squeegee to avoid mechanical damage to the liquid crystal display panel.

According to the liquid crystal display panel and the apparatus and method for manufacturing the same according to the present invention, the material of the squeegee blade used for removing dust from the polarizing plate attaching means is an aromatic polyamide resin having a sharpened end. At the same time, the pressing force of the squeegee blade is controlled by elastic means.
Therefore, a soft squeegee pressure can be applied to the squeegee blade, and the occurrence of defects such as scratches on the panel surface due to the squeegee material and the squeegee pressing force can be suppressed. As a result, the quality of the liquid crystal display panel after assembly can be improved, and the production efficiency of the liquid crystal display panel product can be improved.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

First, the structure of a polarizing plate sticking apparatus for a liquid crystal display panel according to the present invention will be described with reference to FIG. FIG. 1 is a schematic side view showing a configuration of a polarizing plate sticking apparatus for a liquid crystal display panel of the present invention. Note that portions common to those described in the related art are denoted by the same reference numerals.

A PL mounter 10 of the present invention as shown in FIG. 1 includes a squeegee main body 11, a support rod 12 rotatably supported by the squeegee main body 11, an air cylinder 14 for applying a pressing force to the support rod 12, and a main body. As a first feature of the present invention, a compression coil spring 20 as elastic means disposed between the support rod 12 and the arm 13 and a support shaft 1 for rotating the arm 13
5. As a second feature of the present invention, the squeegee blade 21 is attached to the arm 13 by the screw 17, and the liquid crystal display panel 1 as a substrate to be processed is fixed to a stage (not shown). .

The material of the squeegee blade 21 in the PL mounter 10 of the present invention is an aromatic polyamide resin whose tip is sharpened in place of a conventional cutter blade, specifically, Oiles Aramid (Oiles Industries, Ltd.) Product name). This oilless aramid is a molded product of a polyamide resin, and has excellent impact resistance and electrical conductivity. Originally, liquid crystal display panels are sensitive to static electricity, and squeegee materials are limited to conductive substances.
OILES Aramid used in the present invention has high conductivity, and therefore, there is no concern that the liquid crystal display panel 1 may be electrically damaged.

Another important point in selecting a squeegee material is that the squeegee itself does not generate dust. In other words, if the resin molded product is a soft material, the resin may peel off when the polarizing plate is attached to the liquid crystal display panel 1 and be sandwiched between the polarizing plate and the panel surface, resulting in a defective product. If it is too long, the surface of the liquid crystal display panel is mechanically damaged like the above-mentioned cutter blade. In consideration of the above conditions, by selecting a conductive resin material, such as OILES Aramid, as the squeegee material, it is possible to avoid damage to the surface of the liquid crystal display panel 1 and improve the product quality. It becomes possible.

Next, a method for attaching a polarizing plate to the liquid crystal display panel of the present invention configured as described above will be described.

After the liquid crystal display panel 1 as a substrate to be processed is fixed on a stage (not shown), a pressing force is applied to the support rod 12 by the air cylinder 14. The pressing force applied to the support rod 12 is not directly transmitted to the arm 13, but the pressing force transmitted through the compression coil spring 20 is transmitted to the arm 13. That is,
The pressing force generated by the air cylinder 14 is reduced by the compression coil spring 20, and a soft squeegee pressure of 1 kg or less can be applied to the squeegee blade 21. While applying the soft squeegee pressure to the squeegee blade 21 and keeping the squeegee angle approximately 30 °, the driving means (not shown) moves the arm 13 in the moving direction A to remove dust on the liquid crystal display panel 1. Thereafter, a polarizing plate (not shown) cut into each panel size is adhered on the liquid crystal display panel 1.

As described above, according to the method of manufacturing a liquid crystal display panel of the present invention, a soft squeegee pressure can be applied to the squeegee blade 21 by the compression coil spring 20. The occurrence of defects such as scratches can be suppressed. Thereby, the production efficiency of the liquid crystal display panel 1 can be improved. In addition, the squeegee blade 21 is changed from the conventional cutter blade to OILES.
By replacing the squeegee blade 21 with aramid, the life of the squeegee blade 21 is extended, and safety and workability when replacing the squeegee blade are improved. Thereby, the liquid crystal display panel 1
Manufacturing cost can be reduced.

Further, in the method of manufacturing a liquid crystal display panel according to the present invention, the squeegee material is changed from metal to resin material and the squeegee pressure is softened. It will also be able to support the newly developed ferroelectric liquid crystal display panel and new type of liquid crystal display panel to be developed in the future.

The present invention is not limited to the above embodiment,
Various embodiments can be employed. For example, in the above-described embodiment, a method of attaching a single polarizing plate to a liquid crystal display panel has been described as an example, but it is of course that the present invention can also be applied to a liquid crystal display panel in an aggregated state. Further, in the above-described embodiment, the polarizing plate attaching step is exemplified, but the present invention is applicable to any substrate on which a seal is attached and dust is removed. Further, it goes without saying that the present invention is not limited to the above-described embodiment, but can be developed in various forms.

[0023]

As described above, according to the liquid crystal display panel and the apparatus and method for manufacturing the same of the present invention, a resin material having conductivity is selected for the squeegee material, and the elasticity for softening the squeegee pressing force is provided. By providing the means, the occurrence of defects such as scratches due to the squeegee material or the squeegee pressure on the surface of the liquid crystal display panel can be suppressed, and the production efficiency of the liquid crystal display panel can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a configuration of a polarizing plate sticking apparatus for a liquid crystal display panel of the present invention.

FIG. 2 is a schematic sectional view showing a basic configuration of a liquid crystal display panel according to the present invention.

FIG. 3 is a schematic side view showing a configuration of a conventional polarizing plate sticking device for a liquid crystal display panel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display panel, 2 ... Counter substrate, 3 ... Drive substrate, 4
... Seal material, 5 ... Liquid crystal, 10 ... PL mounter, 11 ... Squeegee body, 12 ... Support rod, 13 ... Arm, 14 ... Air cylinder, 15 ... Support shaft, 16 ... Cutter blade, 17 ... Screw, 20 ... Compression coil spring , 21 ... Squeegee blade

Claims (7)

[Claims] 1. A manufacturing apparatus for a liquid crystal display panel having a polarizing plate sticking means for sticking a polarizing plate on a substrate, wherein a squeegee blade used for removing dust of the polarizing plate sticking means is formed to have a sharp end. An apparatus for manufacturing a liquid crystal display panel, wherein the pressing force of the squeegee blade is controlled by elastic means to avoid mechanical damage to the liquid crystal display panel. 2. The apparatus for manufacturing a liquid crystal display panel according to claim 1, wherein the aromatic polyamide resin has conductivity. 3. The apparatus according to claim 1, wherein the aromatic polyamide resin is Oiles-aramid. 4. The apparatus according to claim 1, wherein the pressing force of the squeegee blade is set to 1 kg or less. 5. A liquid crystal display panel manufactured by the apparatus for manufacturing a liquid crystal display panel according to claim 1. Description: 6. A method for manufacturing a liquid crystal display panel having a polarizing plate sticking step of sticking a polarizing plate on a substrate, wherein the squeegee in the dust removing step of the polarizing plate sticking step is made conductive and has a sharp tip. Manufacturing a liquid crystal display panel, comprising: a step of using a processed aromatic polyamide resin; and an elasticity step of softening the pressing force of the squeegee to avoid mechanical damage to the liquid crystal display panel. Method. 7. A liquid crystal display panel manufactured by the method for manufacturing a liquid crystal display panel according to claim 6.