KR101048372B1 - Loving cloth and rubbing device using same - Google Patents

Abstract

Disclosed are a rubbing cloth and a rubbing device using the same to remove static electricity generated by friction to prevent pixel defects. Antistatic treatment or files planted on the rubbing cloth fabric formed by weaving the weaving yarn and the warp fabric to prevent the static electricity generated by friction between the pile and the culture membrane by antistatic treatment.

Rubbing cloth, antistatic treatment, static electricity, rubbing device, alignment film

Description

Rubbing cloth and rubbing device using the same {RUBBING FABRIC AND APPARATUS FOR RUBBING USING THE SAME}

1 is a perspective view of a rubbing cloth according to a first embodiment of the present invention.

2 is an enlarged view of a portion A of FIG. 1;

3 is a cross-sectional view taken along the line B-B in FIG. 2.

4 is a cross-sectional view of a rubbing cloth according to a second embodiment of the present invention.

5 is a conceptual diagram of a rubbing device according to the present invention.

FIG. 6 is a longitudinal cross-sectional view of the rubbing roller shown in FIG. 5.

The present invention relates to a rubbing cloth and a rubbing device using the same, and more particularly, to a rubbing cloth and a rubbing device using the same, which prevent a defect from occurring in a pixel of a liquid crystal display due to static electricity generated when the rubbing cloth and the alignment layer are rubbed. It is about.

In general, a liquid crystal display device (LCD) may be defined as a flat panel display device which performs a display with a liquid crystal (LC).                         

In general, the liquid crystal used in the liquid crystal display device has a long rod shape and polarity on both sides. Such liquid crystals have an electrical characteristic that is arranged along an externally applied electric field, similar to a compass. In addition to the electrical properties, the liquid crystal also has an optical characteristic in which light transmittance for transmitting light is changed depending on the arrangement.

In order to perform a display with a liquid crystal having such a characteristic, the liquid crystal is regularly arranged before an electric field is applied. In the liquid crystal display field, this is often referred to as forming a "domain".

There are various methods of forming the domain of the liquid crystal, but the most commonly used method is the rubbing process.

The rubbing process is a process of forming a groove in a specific direction by using a cloth on the surface of the orientation film on which the liquid crystal is disposed. By the rubbing process, an alignment groove having a fine groove shape is formed on the surface of the alignment layer.

The alignment groove is realized by a rubbing fabric attached to the surface of the cylindrical roller.

A rubbing cloth is produced by inserting a pile into a rubbing cloth fabric made by weaving a blade and a line. The pile formed on the rubbing cloth fabric rubs with the surface of the alignment film as the roller rotates. In this process, the pile scratches the surface of the alignment layer, whereby the alignment grooves are formed in the form of long scratches on the surface of the alignment layer.

However, when the alignment grooves are formed in the alignment layer by a rubbing process, static electricity is generated due to the friction between the rubbing cloth, which is a synthetic fiber, and the alignment layer, which is a polyimide thin film, and has a high voltage of several tens of 정전기. Destroy the thin film transistor formed below. As a result, a pixel defect in which an image is not displayed may occur in a pixel connected to the destroyed thin film transistor.

Accordingly, the present invention has been made in view of such a conventional problem, and a first object of the present invention is to provide a rubbing cloth in which an alignment groove is formed in an alignment layer with an antistatic rubbing cloth to prevent pixel defects from occurring due to static electricity. .

A second object of the present invention is to provide a rubbing device using an antistatic treated rubbing cloth to prevent pixel defects from being generated by static electricity.

In order to realize the first object of the present invention, the present invention provides an antistatic treatment of a rubbing cloth fabric interwoven with a string and a string and interwoven with a string and a string, which are planted between the string and the string. Provide a rubbing cloth.

In order to realize the second object of the present invention, the present invention is provided with a base body on which a mother substrate on which an alignment layer is formed is mounted, spaced apart from the base body, and installed to face the mother substrate, and having a cylindrical shape having a first diameter and a first length. It includes a rotating roller, a rubbing cloth fabric attached to the circumferential surface of the roller and interwoven with a string and a string, and a pile planted between the string and a string and protruding toward the mother board, and an antistatic rubbing cloth to remove static electricity. It provides a rubbing device comprising a rubbing roller rotating device for rotating the rubbing roller and the rubbing roller.                     

According to the present invention, when the culture groove is formed on the culture membrane using the antistatic rubbing cloth, the static electricity generated when the rubbing cloth and the culture membrane are rubbed is discharged to the roller through the antistatic rubbing cloth, thereby causing a thin film transistor. Can be prevented from being destroyed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Antistatic treatment embodiments of rubbing cloth

Example 1

1 is a perspective view of a rubbing cloth according to a first embodiment of the present invention.

Referring to FIG. 1, the rubbing cloth 100 is composed of a rubbing cloth fabric 110 and a pile 120.

The rubbing cloth fabric 110 is woven while crossing the string and the blade. In FIG. 1, the string is indicated by reference numeral 111 and the blade is indicated by reference numeral 112. The string 111 and the blade 112 are weave, and the blade has a longer length than the string.

FIG. 2 is an enlarged view of a portion A of FIG. 1.

Referring to FIG. 2, piles 120 are inserted and planted between the rubbing cloth fabric 110 composed of the string 111 and the blade 112. The piles 120 are arranged in a matrix form on the rubbing cloth fabric.

Since the rubbing cloth 100 having such a configuration is a synthetic fiber, static electricity is easily generated by friction. When the culture groove is formed in the culture membrane using the rubbing cloth 100, the thin film transistor of the liquid crystal display device is destroyed and foreign matter is adsorbed on the culture membrane. In order to solve this problem, in this embodiment, the rubbing cloth 100 is antistatically treated so that static electricity generated by friction is not applied to the thin film transistor of the liquid crystal display device. This will be described in more detail as follows.

3 is a cross-sectional view taken along the line B-B in FIG. 2.

As illustrated in FIG. 3, the string 111 and the blade 112 forming the rubbing cloth fabric 110 and the surface of the pile 120 are coated with a thin antistatic film 130 having conductivity.

The antistatic film 130 is formed by dipping the rubbing cloth 100 in a bath in which the antistatic agent is diluted.

Alternatively, the antistatic agent diluted solution may be sprayed onto the rubbing cloth 100 and then dried to form an antistatic film 130 on each of the rubbing cloth fabric 110 and the pile 120.

The antistatic agent forming the antistatic film 130 has both hydrophobicity with a low affinity with water and a high affinity with oil and a high affinity with water in the molecule. The hydrophobic portion adsorbs on the surface of the synthetic fiber to arrange the hydrophilic portion outward, and the hydrophilic portion arranged outside absorbs moisture in the air. Accordingly, due to the moisture absorbed by the hydrophilic portion and the conductivity of the antistatic layer 130 itself, static electricity is prevented from being applied from the rubbing cloth having the low electrical resistance toward the alignment layer having the high electrical resistance. Therefore, the thin film transistor can be prevented from being destroyed by static electricity.                     

When the antistatic agent 130 is sprayed onto the rubbing cloth 100 as in this embodiment, or the antistatic agent is formed by dipping the rubbing cloth 100 in the diluted solution, and forming the antistatic film 130 on the rubbing cloth 100. Static electricity generated due to the friction of the rubbing cloth 100 is removed by the antistatic film 130. In addition, when the anti-static agent is sprayed on the rubbing cloth 100, or when the anti-static treatment of the rubbing cloth 100 by soaking the rubbing cloth 100 in a solution in which the antistatic agent is diluted, charging is also performed in a conventionally used rubbing cloth. Prevention process can be made easy.

[Example 2]

4 is a cross-sectional view of a rubbing cloth according to a second embodiment of the present invention. This embodiment is the same as Example 1 except for the antistatic film formed on the surface of the rubbing cloth. Therefore, the same members are denoted by the same reference numerals as those in the first embodiment, and duplicated descriptions thereof will be omitted.

Referring to FIG. 4, the antistatic agent 140 is mixed when melt spinning the synthetic fibers forming the rubbing cloth 100. The antistatic agent 140 mixed with the synthetic fibers moves to the surface after the manufacturing process to form a very thin electric charge layer.

When the rubbing cloth 100 is made by weaving the weft 111, the warp 112, and the pile 120 using the synthetic fiber mixed with the antistatic agent 140, the electric charge layer formed by the antistatic agent 140 is rubbing. The static electricity generated by the friction of the cloth 100 is removed.

[Rubing device]                     

5 is a conceptual diagram of a rubbing device according to the present invention.

Referring to FIG. 5, the rubbing device 500 includes a base body 150, a rubbing roller 200, and a rubbing roller rotating device 300.

The base body 150 includes a substrate 10 having an alignment layer 1 formed thereon, for example, a TFT substrate or a color filter substrate of a liquid crystal display device.

FIG. 6 is a longitudinal cross-sectional view of the rubbing roller shown in FIG. 5.

Referring to FIG. 6, the rubbing roller 200 includes a roller 190 and a rubbing cloth 100.

The roller 190 has a cylindrical shape having a first diameter and a first length and is spaced apart from the base body 150 by a predetermined distance and facing the substrate 10. The roller 190 is formed of a conductive material to discharge static electricity. The rubbing cloth 100 is attached to the surface of the roller 190.

The rubbing cloth 100 is subjected to an antistatic treatment to prevent static electricity generated by friction. That is, by coating a thin antistatic film 140 on the surface of the rubbing cloth 100, the antistatic treatment of the rubbing cloth 100, or the antistatic agent 140 when melt spinning the synthetic fiber to make the rubbing cloth 100 By mixing the rubbing cloth 100 to the antistatic treatment.

The rubbing roller 200 having such a configuration is rotated by the rubbing roller rotating apparatus 300. In one embodiment, the rubbing roller rotating device 300 is a motor for rotating the rubbing roller 200.

Referring to the operation of the rubbing device having such a configuration as follows.                     

First, the substrate 10, which is one of a TFT substrate or a color filter substrate on which an alignment layer is formed, is transported and seated on the base substrate 200.

In a state where the substrate 10 is transferred to the base substrate 100, the rotating rubbing roller 200 is aligned with the substrate 10. As the rotating rubbing roller 200 and the substrate 10 come into close contact with each other, the piles 120 formed on the rubbing cloth 100 attached to the surface of the rubbing roller 200 are strongly rubbed with the alignment film 1 while the alignment film 1 An alignment groove for aligning the liquid crystal is formed on the surface of.

At this time, tens of thousands of GHz of static electricity may be generated between the piles 120 which are synthetic fibers and the culture membrane 1 which is a polyimide membrane. The generated static electricity is discharged through the rollers 190 to which the rubbing cloth 100 is attached after being leaked through the antistatic treatment of the piles 120 and the rubbing cloth fabric 110. Accordingly, the static electricity generated by the friction between the piles 120 and the culture membrane 1 is removed without destroying the thin film transistor formed under the culture membrane 1.

As described in detail above, since the antistatic rubbing cloth removes static electricity generated between the piles and the culture film, it is possible to prevent the occurrence of pixel defects due to static electricity, thereby improving the reliability of the product. It can be effective.

In the detailed description of the present invention described above with reference to a preferred embodiment of the present invention, those skilled in the art or those skilled in the art having ordinary knowledge in the scope of the invention described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (7)

delete delete delete A base body on which a mother substrate on which an alignment layer is formed is mounted; A rubbing cloth spaced apart from the base body and installed to face the mother substrate, the roller rotating in a cylindrical shape having a first diameter and a first length, attached to the circumferential surface of the roller and woven so that the blade line and the line are intersected. A rubbing roller comprising a fabric and a pile planted between the blade and the string and protruding toward the mother substrate and including an antistatic rubbing cloth to remove static electricity; And And a rubbing roller rotating device for rotating the rubbing roller. The rubbing device according to claim 4, wherein the roller is formed of a conductive material to prevent the static electricity. The rubbing device according to claim 4, wherein an antistatic agent film containing an antistatic agent is formed on the surface of the rubbing cloth fabric and the piles. The rubbing device according to claim 4, wherein an antistatic agent is mixed with the synthetic fiber for making the blade, the string and the pile.

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