KR20100078258A - Rubbing device for liquid crystal display device - Google Patents

Rubbing device for liquid crystal display device Download PDF

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Publication number
KR20100078258A
KR20100078258A KR1020080136466A KR20080136466A KR20100078258A KR 20100078258 A KR20100078258 A KR 20100078258A KR 1020080136466 A KR1020080136466 A KR 1020080136466A KR 20080136466 A KR20080136466 A KR 20080136466A KR 20100078258 A KR20100078258 A KR 20100078258A
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KR
South Korea
Prior art keywords
liquid crystal
rubbing
mother substrate
rollers
substrate
Prior art date
Application number
KR1020080136466A
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Korean (ko)
Inventor
김동국
이우근
Original Assignee
엘지디스플레이 주식회사
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Application filed by 엘지디스플레이 주식회사 filed Critical 엘지디스플레이 주식회사
Priority to KR1020080136466A priority Critical patent/KR20100078258A/en
Publication of KR20100078258A publication Critical patent/KR20100078258A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)

Abstract

PURPOSE: A rubbing device for a liquid crystal display device is provided to uniformly form alignment layer to a plurality of liquid crystal panels. CONSTITUTION: In a table(150), a mother substrate(160) including a plurality of liquid crystal panels(100) is settled. At least two or more rubbing rollers(130) is connected to one side of the mother substrate. The rubbing roller classifies the mother substrate into at least two or more areas. The rubbing roller is arranged to longitudinal direction of the mother substrate. A support rod(135) respectively supports the rubbing roller. A driving motor rotates the rubbing rollers.

Description

Rubbing device for liquid crystal display device

The present invention relates to a rubbing device for a liquid crystal display device, and more particularly to a rubbing device for a liquid crystal display device capable of rubbing an alignment layer on a plurality of liquid crystal panels.

Recently, with the rapid development of the information society, the necessity of a flat panel display device having excellent characteristics such as thinness, light weight, and low power consumption has emerged.

Such a flat panel display device can be divided according to whether it emits light by itself or not. A light emitting display device displays an image by emitting light by itself, and displays an image by using an external light source. It is called. The light emitting display includes a plasma display device panel, a field emission display, an electro luminescence display, and the light receiving display includes a liquid crystal display. crystal display device).

Among the liquid crystal display devices, an active matrix liquid crystal display device in which a thin film transistor and pixel electrodes connected to the thin film transistors are arranged in a matrix manner has been attracting the most attention because of its excellent resolution and video performance. The liquid crystal display includes a color filter substrate on which a common electrode is formed, an array substrate on which pixel electrodes are formed, and a liquid crystal layer formed between the two substrates. In such a liquid crystal display, the common electrode and the pixel electrode are caused by an electric field applied up and down. It is excellent in the characteristics, such as transmittance | permeability and aperture ratio, by the method of driving a liquid crystal.

However, the liquid crystal drive due to the electric field up and down has a disadvantage that the viewing angle characteristics are not excellent. Accordingly, a transverse field type liquid crystal display device having excellent viewing angle characteristics has been proposed to overcome the above disadvantage.

The transverse field type liquid crystal display device includes an array substrate having a common electrode and a pixel electrode on the same plane, a color filter substrate facing the array substrate, and a liquid crystal layer formed between the array substrate and the color filter substrate. Such a transverse electric field type liquid crystal display device displays an image by controlling the transmittance of light by moving liquid crystal molecules of the liquid crystal layer by a horizontal electric field generated between the common electrode and the pixel electrode.

In the liquid crystal panel of the liquid crystal display, a process of manufacturing an array substrate in which a common electrode, a pixel electrode, and a thin film transistor, which is a switching element, is formed for each pixel, and a color of red, green, and blue is applied to each pixel in opposition to the array substrate. After the liquid crystal is injected between the process of manufacturing a correspondingly formed color filter substrate and the array substrate and the color filter substrate fabricated through the two processes, a series of processes of bonding are completed.

The liquid crystal panel manufacturing process is called a cell process, and the cell process includes an alignment process for aligning liquid crystals in one direction to an array substrate and a color filter substrate, and a cell 겝 forming process for maintaining a constant gap by bonding two substrates together. It can be roughly divided into a cutting step and a liquid crystal injection fixation.

Many of the alignment processes for forming the liquid crystal panel are as follows.

The alignment process is divided into an alignment layer forming process and a rubbing process, and an alignment layer is formed by coating a polyimide, which is a polymer material, on the array substrate and the color filter substrate in the alignment layer forming process.

The rubbing process is performed by fixing a rotating rubbing roller at a height corresponding to the thickness of the mother substrate on which the plurality of substrates are arranged, and advancing the mother substrate seated on the table in one direction.

On the other hand, as the demand for large area substrates increases, the size of the mother substrate seated on the table is increasing. As the size of the mother substrate increases, a rubbing roller for rubbing a plurality of substrates disposed on the mother substrate also increases in size.

There is a limit to the size of the rubbing roller, and when a plurality of substrates disposed on the mother substrate are rubbed by the rubbing roller, rubbing directionality between the substrate positioned at the center portion of the mother substrate and the substrate positioned at the edge portion thereof. There will be a difference.

That is, when the rubbing roller rubs a plurality of substrates disposed on the mother substrate, vibration is generated at the edge portion of the mother substrate by rotational torque, so that the rubbing direction in the substrate positioned at the edge portion of the mother substrate The rubbing directivity of the substrate located at the center of the mother substrate is lower. The degree of rubbing of the substrates arranged for each region of the mother substrate is changed so that the alignment layer is not uniformly aligned in the entire region.

An object of the present invention is to provide a rubbing device for a liquid crystal display device capable of uniformly forming an alignment layer on a plurality of liquid crystal panels.

A rubbing device of a liquid crystal display according to an exemplary embodiment of the present invention includes a table on which a mother substrate including a plurality of liquid crystal panels on which an alignment layer is formed is seated, and a side surface of the mother substrate, which is divided into at least two regions. At least two rubbing rollers arranged in the longitudinal direction of the mother substrate, a support for supporting each of the at least two rubbing rollers, and a driving motor positioned on the support and rotating the at least two rubbing rollers.

The rubbing device of the liquid crystal display according to the present invention may include at least two rubbing rollers to form an alignment layer on a plurality of liquid crystal panels.

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

1 is a view illustrating a rubbing device of a liquid crystal display according to an exemplary embodiment of the present invention.

As shown in FIG. 1, the rubbing device of the liquid crystal display according to the exemplary embodiment of the present invention includes a table 150 on which the mother substrate 160 including the plurality of liquid crystal panels 100 is mounted, and the table ( It includes a rubbing roller 130 for rubbing the alignment film formed on the plurality of liquid crystal panel 100 included in the mother substrate 160 spaced apart from the mother substrate 160 seated on the 150. The rubbing roller 130 is composed of first to third rubbing rollers (130a ~ 130c).

The first rubbing roller 130a is used to rub an alignment layer formed on the liquid crystal panel 100 disposed on the mother substrate 160, and the second rubbing roller 130b is a central portion of the mother substrate 160. It is used to rub the alignment film formed on the liquid crystal panel 100 disposed on the substrate, and the third rubbing roller 130c is used to rub the alignment film formed on the liquid crystal panel 100 disposed below the mother substrate 160. .

As shown in FIG. 2, the liquid crystal panel 100 is configured in a transverse electric field mode. The array substrate 110 of the liquid crystal panel 100 includes a gate electrode 115, a gate insulating layer 121, and a semiconductor layer 125 formed in the pixel region P corresponding to the gate electrode 115. A thin film transistor TFT formed of source and drain electrodes 133 and 136 spaced apart from each other by a predetermined interval is formed.

In addition, a plurality of pixel electrodes 145 are disposed on the common electrode 120 formed in the horizontal direction on the array substrate 110, and the protection layer 142 formed covering the common electrode 120 and the thin film transistor TFT. ) Are alternately formed with the common electrode 120. The pixel electrode 145 is formed in contact with the drain electrode 136 of the thin film transistor TFT through a contact hole.

A first alignment layer 153 is formed on the pixel electrode 145 and the exposed protective layer 142, and a color filter substrate 161 is disposed on the first alignment layer 153.

A black matrix 163, a color filter layer 165 formed on the black matrix 163, and an overcoat layer 167 formed on the color filter layer 165 are sequentially formed on the color filter substrate 161. . A second alignment layer 170 is formed on the overcoat layer 167.

The array substrate 110 and the color filter substrate 161 are bonded to each other, and a liquid crystal layer 190 is formed between the array substrate 110 and the color filter substrate 161. The A-plate 195 having a phase difference value in a specific range may be disposed on the outer surface of the color filter substrate 161 of the liquid crystal panel 100 thus completed.

The liquid crystal display device having the liquid crystal panel 100 having such a configuration uses the electro-optic effect of the liquid crystal, and the electro-optic effect is determined by the anisotropy of the liquid crystal itself and the arrangement state of the molecules 191 of the liquid crystal. Control of the arrangement of the molecules 191 of the liquid crystal has a great influence on the stabilization of the display quality of the liquid crystal display.

Therefore, a rubbing process is performed to align the liquid crystal molecules 191 more effectively, and the rubbing process is very important in relation to image quality characteristics in the liquid crystal cell process.

As described above, a rubbing device for a liquid crystal display according to the present invention includes a table on which a mother substrate 160 on which a plurality of liquid crystal panels 100 having first and second alignment layers 153 and 170 are formed is disposed. The rubbing process is performed by rubbing the surface of the liquid crystal panel 100 while the first to third rubbing rollers 130a to 130c rotate while the 150 moves in the direction of the arrow.

The table 150 is provided in a plate shape having a substantially rectangular shape, and the liquid crystal panel 100 on which the first and second alignment layers 153 and 170 are formed is mounted on the table 150.

The first and second alignment layers 153 and 170 apply a polyimide or polyamic acid-based material to the array substrate and the color filter substrate 110 and 161 with a slit coater or a printing roller. It is formed in such a way as to.

Each of the first to third rubbing rollers 130a to 130c is provided in the form of a cylinder having a central axis and an outer circumferential surface. Since the first to third rubbing rollers 130a to 130c should rub the liquid crystal panel 100 on which the first and second alignment layers 153 and 170 are formed, the first to third rubbing rollers 130a to 130c are disposed in contact with the upper portion of the liquid crystal panel 100.

A rubbing cloth 140 is wound around the outer circumferential surface of each of the first to third rubbing rollers 130a to 130c to rub the alignment films 153 and 170 of the liquid crystal panel 100 to the alignment films 153 and 170. It forms a pretilt angle. The rubbing cloth 140 is a kind of woven fabric such as velvet or velvety, in which fibers such as rayon or nylon are woven into pile fabrics woven with warp and weft yarns.

At one end of each of the first to third rubbing rollers 130a to 130c, a driving motor (not shown) for rotating the rubbing roller 130 is provided to the first to third rubbing rollers 130a to 130c. Is rotated on the liquid crystal panel 100.

In addition, each of the first to third rubbing rollers 130a to 130c is provided with a support 135 for supporting the first to third rubbing rollers 130a to 130c. The drive motor may be provided on the support 135.

As illustrated in FIG. 3, the mother substrate 160 on which the rubbing is performed by the rotation of the first to third rubbing rollers 130a to 130c may be divided into first to third regions A to C. FIG. . The divided first to third regions A to C may be divided according to positions where the first to third rubbing rollers 130a to 130c are disposed on the mother substrate 160.

Therefore, when two rubbing rollers are disposed on the mother substrate 160, the mother substrate 160 may be divided into two regions by the two rubbing rollers. As a result, the number of rubbing rollers 130 for rubbing the plurality of liquid crystal panels 100 disposed on the mother substrate 160 should be at least two or more.

As the first to third rubbing rollers 130a to 130c rotate in contact with the first to third regions A to C of the mother substrate 160, respectively, the mosquitoes as the table 150 proceeds in one direction. A rubbing process is performed on the plurality of liquid crystal panels 100 included in the plate 160.

The first to third rubbing rollers 130a to 130c rotate with the same rotational torque in the first to third areas A to C, respectively, and thus correspond to the first to third areas A to C. The plurality of liquid crystal panels 100 arranged to be rubbed in the same manner.

The liquid crystal panel 100 disposed in the first and third regions A and C, which are edge portions of the mother substrate 160, and the liquid crystal panel disposed in the second region B, which is the center portion of the mother substrate 160, respectively. 100 is rubbed equally. This is because the magnitude of the variation vector of the rotation axis generated in each of the first to third rubbing rollers 130a to 130c is the same in the first to third areas A to C.

Since the number of the first to third rubbing rollers 130a to 130c contacting the plurality of liquid crystal panels 100 included in the mother substrate 160 is three, the length of each of the rubbing rollers 130a to 130c is one. It becomes shorter than the existing rubbing device including a rubbing roller.

The length of the first to third rubbing rollers 130a to 130c is shortened to occur in the first to third rubbing rollers 130a to 130c when the first to third regions A to C are rotated. Vibration is relatively reduced compared to the existing rubbing device.

As the vibrations generated while the first to third rubbing rollers 130a to 130c are reduced, the liquid crystal panel positioned at the edge portions A and C and the center portion B of the mother substrate 160, respectively. Uniaxial rubbing directivity of the alignment films 153 and 170 formed in 100 is the same.

As a result, rubbing proceeds by applying the same size pressure to the entire surface of the plurality of liquid crystal panels 100 disposed on the mother substrate 160, so that the uniaxial rubbing direction of the alignment layers 153 and 170 formed on the liquid crystal panel 100 is improved. Will be the same. Since the plurality of liquid crystal panels 100 disposed on the mother substrate 160 have alignment layers 153 and 170 having the same rubbing direction, defects due to non-uniformity of the rubbing direction may be prevented.

1 is a view showing a rubbing device of a liquid crystal display according to an embodiment of the present invention.

2 is a view showing in detail the liquid crystal panel of FIG.

3 is a plan view illustrating a plurality of liquid crystal panels and rubbing rollers disposed on the mother substrate of FIG. 1.

<Brief description of the main parts of the drawing>

100: liquid crystal panel 110: array substrate

115: gate electrode 120: common electrode

121: gate insulating film 125: semiconductor layer

130: rubbing rollers 130a to 130c: first to third rubbing rollers

133: source electrode 135: support

136: drain electrode 140: rubbing cloth

142: protective layer 145: pixel electrode

150: Table 160: Mosquito Board

153 and 170: first and second alignment layers 161: color filter substrate

153: black matrix 163: black matrix

165: color filter layer 167: overcoat layer

170: second alignment layer 190: liquid crystal layer

191: liquid crystal molecule 195: A-plate

Claims (3)

A table on which a mother substrate including a plurality of liquid crystal panels having an alignment layer formed thereon is seated; At least two rubbing rollers which contact one side of the mother substrate and divide the mother substrate into at least two regions and are arranged in the longitudinal direction of the mother substrate; A support for supporting each of the at least two rubbing rollers; And And a driving motor positioned on the support to rotate the at least two rubbing rollers. According to claim 1, And the at least two rubbing rollers have the same axis of rotation. According to claim 1, And a plurality of substrates on which the alignment layer is formed, having the same uniaxial rubbing direction.
KR1020080136466A 2008-12-30 2008-12-30 Rubbing device for liquid crystal display device KR20100078258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080136466A KR20100078258A (en) 2008-12-30 2008-12-30 Rubbing device for liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080136466A KR20100078258A (en) 2008-12-30 2008-12-30 Rubbing device for liquid crystal display device

Publications (1)

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KR20100078258A true KR20100078258A (en) 2010-07-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105467688A (en) * 2016-01-29 2016-04-06 京东方科技集团股份有限公司 Rubbing alignment device, system and method, display substrate and display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105467688A (en) * 2016-01-29 2016-04-06 京东方科技集团股份有限公司 Rubbing alignment device, system and method, display substrate and display device
WO2017128769A1 (en) * 2016-01-29 2017-08-03 京东方科技集团股份有限公司 Rubbing alignment device, assembly and method therefor, display substrate and display device
CN105467688B (en) * 2016-01-29 2019-09-06 京东方科技集团股份有限公司 Friction orientation device, system and method and display base plate, display device
US10656469B2 (en) 2016-01-29 2020-05-19 Boe Technology Group Co., Ltd. Rubbing alignment device

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