lcd panel rubbing cloth supplier

Youngdo Velvet, the pride of Korean Velvet Industry, announced that they succeed in co-developing the velvet fabric for rubbing LCD panel with HYPERPLEX Co, LTD, flexible PCB Manufacturer, for the first time in Korea.

The present invention relates to a rubbing cloth and an LCD (Liquid Crystal Display), and more particularly to a rubbing cloth for aligning a liquid crystal, method of manufacturing the same, apparatus for manufacturing the same and method of manufacturing an LCD using the same.

In general, an LCD apparatus displays image information using electro-optics properties of a liquid crystal. Some LCD apparatus transmits a light when an electric field is not applied to the liquid crystal. But some LCD apparatus intercepts a light when an electric field is not applied to the liquid crystal, and transmits the light when the electric field is applied to the liquid crystal.

Some LCD apparatus intercepts a light when an electric field is not applied to the liquid crystal, and the LCD apparatus transmits the light when the electric field is applied to the liquid crystal.

The alignment film is as a polyimide thin film layer. When rubbing the alignment film against a rubbing cloth toward the uniform direction, an alignment groove is formed on the alignment film. The alignment of the liquid crystal is performed by means of the alignment groove. The rubbing cloth wind around an outer circumference of a rubbing roller, and the alignment groove is formed on the alignment film by rubbing the rubbing roller having the rubbing cloth against the alignment film.

Hereinafter, manufacturing processes of the rubbing cloth will be described with reference to FIGS. 1A to 1F. Here, a term referred to as a “rubbing cloth fabric” indicates a cloth having a length and a width shorter than the length.

Referring to FIG. 1A, the rubbing cloth fabric 100 is manufactured by interweaving a weft 1 with a warp 2, the warp 2 intersecting the weft 1 and having a length longer than that of the weft 1. The rubbing cloth fabric 100 includes a rubbing pile 110 irregularly formed on the rubbing cloth fabric 100 as shown in FIGS. 1B and 1C.

Referring to FIG. 1D, a roller brush 200 for rearranging the rubbing pile 110 is disposed in a direction parallel to a width direction of the rubbing cloth fabric 100. The width direction is the same direction in which the weft 1 is formed on the rubbing cloth fabric 100. When the roller brush 200, which is in contact with the rubbing cloth fabric 100, is transferred, the rubbing pile 110 is realigned in a direction parallel to the warp 2. The realigned rubbing pile has been allowed to have a reference numeral “115”.

As shown in FIG. 1E, the rubbing cloth fabric 100 having the realigned rubbing pile 115 is cut into pieces. A piece of rubbing cloth fabric which is cut from the rubbing cloth fabric 100 is defined as a rubbing cloth 150.

The rubbing cloth 150 is attached onto a rubbing roller 300 which has a length longer than a width of the alignment film. In order to attach the rubbing cloth 150 onto the rubbing roller 300, the rubbing cloth 150 has a length similar to a length of the rubbing roller 300, and has a width similar to a length of the circumference surface of the rubbing roller 300. That is, the warp 2 of the rubbing cloth 150 is aligned along the circumference surface of the rubbing roller 300, the weft 1 is aligned in the length direction of the rubbing roller 300, and the rubbing pile 110 is aligned parallel to the weft 1.

As shown in FIG. 1F, when the rubbing roller 300, on which the rubbing cloth 150 is wound, rotates and simultaneously applies pressure to the alignment film 400, the alignment groove is formed on the alignment film 400.

However, when the alignment groove is formed by means of the conventional rubbing roller 300 to which the rubbing cloth 150 is attached, the liquid crystal cannot be precisely aligned with the alignment groove due to a scratch formed on the alignment film 400. It is difficult to totally control a tension of the rubbing cloth fabric 100 when the rubbing roller 300 is rubbed against the alignment film 400 along the warp 2. When the tension of the rubbing cloth fabric 100 is not precisely controlled, the rubbing pile 110 is irregularly distributed on the rubbing cloth fabric 100. Therefore, the liquid crystal cannot be precisely aligned with the alignment groove.

Also, when the alignment film 500 has a larger size than that of the rubbing cloth 150, as shown as reference numeral 500 in FIG. 1E, it is not possible to form the alignment groove by means of the rubbing cloth fabric 100 having a width shorter than that of the alignment film 500.

In one aspect of the invention, there is provided a rubbing cloth for aligning a liquid crystal, the rubbing cloth being formed by cutting a portion of a rubbing cloth fabric in a length direction of a warp on the rubbing cloth fabric, wherein the rubbing cloth fabric comprising: a warp having a first length; a weft having a second length shorter than the first length and being interweaved with the warp; and a rubbing pile aligned along the length direction of the weft.

In another aspect, there is provided a method for manufacturing a rubbing cloth for aligning liquid crystal, comprising: making a rubbing cloth fabric including a warp having a first length, a weft having a second length shorter than the first length and being interweaved with the warp, and a rubbing pile irregularly formed on the rubbing cloth fabric; aligning the rubbing pile in a length direction of the weft; and cutting the rubbing cloth fabric in a length direction of the warp.

In further aspect, there is provided an apparatus for manufacturing a rubbing cloth, comprising: a rubbing belt installed in a width direction of a rubbing cloth fabric, wherein the rubbing cloth fabric includes a warp having a first length, a weft having a second length shorter than the first length and being interweaved with the warp, and a rubbing pile formed on a surface of the rubbing cloth fabric; a pulley for receiving a rotating force and rotating the rubbing belt in response to the rotating force; and means for supplying the rotating force to the pulley.

In still another aspect, there is provided a method for manufacturing an LCD, comprising: fabricating a TFT substrate having a TFT, a power supply line for supplying a power to the TFT, and a pixel electrode for receiving the power outputted from the TFT; fabricating a color filter substrate having RGB pixels and a common electrode, and being coupled to the TFT substrate; forming a rubbing groove by rubbing a rubbing roller against an alignment film formed on the TFT substrate and the color filter substrate, wherein the rubbing roller is wound with a rubbing cloth formed by cutting a rubbing cloth fabric, and wherein the rubbing cloth fabric has a warp having a first length, a weft having a second length shorter than the first length and being interweaved with the warp, and a rubbing pile aligned along the length direction of the weft; assembling the TFT substrate with the color filter substrate; and interposing a liquid crystal between the TFT substrate and the color filter substrate.

According to the present invention, the rubbing cloth is formed by interweaving the warp with the weft having a length shorter than that of the warp and the rubbing pile is aligned parallel to the warp. Accordingly, it is able to manufacture the rubbing cloth having a various size without a length of the alignment film and increase yield of the rubbing cloth.

The rubbing cloth fabric 600 is fabricated by interweaving a weft 1 with a warp 2 having a length longer than that of the weft 1. The rubbing pile 118 having a length shorter than that of the weft 1 is disposed on the rubbing cloth fabric 600. The rubbing pile 118 is aligned at an angle about ±30 degrees with respect to the weft 1. Preferably, the rubbing pile 118 is aligned parallel to the weft 1 of the rubbing pile 118.

Disposing the rubbing pile 118 to have the direction parallel to the weft 1 is for precisely controlling a tension of the rubbing cloth fabric 600. When the rubbing pile 118 is aligned to have a direction parallel to the warp 2 having the length longer than that of the weft 1, the tension of the rubbing cloth fabric 600 cannot be precisely controlled, and the rubbing pile 118 is irregularly aligned, so that rubbing processes are not precisely performed. When the rubbing pile 118 is aligned to have a direction parallel to the weft 1 having the length shorter than that of the warp 2, the tension of the rubbing cloth fabric 600 can be precisely controlled, thereby preventing the rubbing pile 118 from being irregularly aligned.

Hereinafter, a method for manufacturing the rubbing cloth will be described with reference to FIGS. 2A to 2C and rubbing processes performed by the rubbing cloth will be described with reference to FIG. 2D.

Referring to FIG. 2A, the rubbing cloth fabric 600 includes the weft 1 and the warp 2 having the length longer than that of the weft 1. The weft 1 is interweaved with the warp 2 in order to fabricate the rubbing cloth fabric 600. The rubbing pile 110 is irregularly disposed on the rubbing cloth fabric 600.

The direction that the warp 2 is formed on the rubbing cloth fabric 600 is defined as a length direction of the rubbing cloth fabric 600, and a direction that the weft 1 is formed on the rubbing cloth fabric 600 is defined as a width direction of the rubbing cloth fabric 600.

As shown in FIG. 2B, the rubbing pile 110 disposed on the rubbing cloth fabric 600 is realigned by means of a belt shape rubbing apparatus 700. The realigned rubbing pile has been allowed to have a reference numeral “118”.

The rubbing apparatus 700 includes a rubbing belt 710 for realigning the rubbing pile 110, first and second pulleys 720 and 730 for receiving a rotating force and driving the rubbing belt 710, and a motor 740 for supplying the rotating force to the first or second pulley 720 and 730 to rotate the first and the second pulleys 720 and 730. The rubbing pile 118 is aligned at an angle about ±30 degrees with respect to the weft 1 by means of the rubbing belt 710. FIG. 2B shows exemplary rubbing piles aligned at an angle of ±30 degrees with respect to the dotted lines that are parallel to the weft.

As shown in FIG. 2C, the rubbing cloth fabric 600 is cut to fabricate the rubbing cloth 800. Particularly, the rubbing cloth 800 is cut to have a width similar to the length of the circumference of the rubbing roller 300, and to have a length similar to the length of the rubbing roller 300.

Accordingly, it possible to prevent a scratch from being formed on the alignment film 400 due to the rubbing pile 115 irregularly disposed on the rubbing cloth 800 during rubbing process of the alignment film 400.

Also, even though the alignment film 400 has a size larger than the width of the rubbing cloth fabric 600, it is able to obtain the rubbing cloth 800 having a size appropriate to the size of the alignment film 400 by controlling a cutting length in the length direction of the rubbing cloth fabric 600.

The LCD includes a TFT substrate and a color filter substrate. A polyimide thin film layer is formed on the TFT substrate having a TFT, a gate line, a data line and a pixel electrode. A rubbing process is performed on the polyimide thin film layer so as to align the liquid crystal.

The rubbing cloth 800 wound around the rubbing roller 300 is fabricated by interweaving the weft 1 and the warp 2 having the length longer than that of the weft 1, and the rubbing pile 118 parallel to the weft 1 thereon is disposed on the rubbing cloth 800.

The alignment groove is formed on the polyimide thin film layer by rubbing the rubbing pile 118 of the rubbing cloth 800 against the polyimide thin film layer. The alignment groove is formed to have a direction parallel to the aligning direction of the rubbing pile 118, so that the liquid crystal is aligned parallel to the aligning direction of the rubbing pile 118.

The alignment groove is formed on the color filter substrate by the process similar to above process. The alignment groove is tilted by a predetermined angle with respect to the alignment groove formed on the TFT substrate. An LCD panel is manufactured by interposing the liquid crystal between the color filter substrate and the TFT substrate after assembling the color filter substrate with the TFT substrate. The LCD is manufactured by assembling parts such as a lamp, a light guiding plate, a power supply device, etc., with the LCD panel.

According to the present invention, the rubbing cloth is formed by interweaving the warp with the weft having a length shorter than that of the warp, and the rubbing pile is formed on the rubbing cloth and is aligned parallel to the warp.

Accordingly, it is possible to manufacture a various size of rubbing cloth regardless of a length of the alignment film, and to increase yield of the rubbing cloth.

Taipei, May 7, 2008 (CENS)--Tai Yuen Textile Co., Ltd. of Yulon Group, the largest automobile manufacturing conglomerate in Taiwan, recently won an approval from Industrial Development Bureau (IDB) of the Ministry of Economic Affairs to venture into development of rubbing cloths, a indispensable material in liquid crystal display (LCD) rubbing production process.

If Tai Yuen successfully develops and commercializes the rubbing cloth, the market manipulation by few Japanese companies will be broken, helping cut the cost of local thin film transistor-liquid crystal display (TFT-LCD) panel makers.

The rubbing cloth is a key material in the rubbing process for making the polyimide film, formed on the two glass panels, thin, even and finely oriented, to control the angle and direction of rising up of LCD molecules between the glass panels.

In 2007, the global demand for rubbing cloth was about 540,000 square meters, of which Yoshikawa Chemical Co. Ltd. and Sekisui Chemical Co. Ltd. of Japan accounted for 95% and 5%, respectively.

Last year, the production value of Taiwan"s flat panel display (FPD) industry reached NT$1.69 trillion (US$55.41 billion at US$1: NT$30.5), outpacing South Korea for the first time to make the island the largest FPD production nation in the world in terms of both production value and volume.

Tai Yuen applied to IDB for an R&D project, in which the firm would invest NT$50 million (US$1.64 million) plus subsidy from the government to develop rubbing cloths

Statistics compiled by IDB showed that the local market value of FPD materials in 2006 and 2007 were NT$209.6 billion (US$6.87 billion) and 242.8 billion (US$7.96 billion), respectively; and the annual value is expected to jump to NT$320 billion (US$10.49 billion) in 2009. In 2010, IDB said, the local-content rate of the TFT-LCD industry is expected to reach 60% (excluding the glass substrate).

In the present invention, the pile of rubbing cloth material tilts at warp direction to the normal to a surface of cloth.The angle of inclination of this pile is preferably more than 5 ° below 45 ° with respect to the surface normal of cloth, more preferably more than 10 ° below 45 °.

The invention is characterized in,, be preferably shrinkage factor and be and (do ripe for 130～150 ℃) more than 10% or boiling water shrinkage (BWS) is synthon (dacron etc.) more than 8% as the synthon of highly shrinkable.In bottom line, use the advantage of the synthon of highly shrinkable, at first be by the thermal treatment bottom line after the system of knitting shrink can make organize closeer.Make the friction cloth that liquid crystal board is used,, produce the uneven possibility of friction owing to be related, so dense structure is better when between pile and the pile when gapped.Utilize this method, can form the dense tissue of knitting the system limit above loom.

In addition,, utilize thermal treatment that cloth is shunk, can increase the line density of the base fabric tissue of velveting, can reduce the elongation of relative organization"s tilted direction by using the high synthon that shrink in end warp and back weft line one or both.At this moment, the contraction of bottom line is influential to the inclination of pile.

In the cut-out of rubbing cloth material, to become the correct cut-out of desirable angle very important (with reference to No. 3155177 communique of Jap.P.) for warp.When the base fabric of rubbing cloth material is organized as solid color, be not easy correctly to set the cut-out angle of warp.At present, be to be that prerequisite is cut off with the right angle intersection with respect to warp with parallel, to wish crooked manyly yet on existing friction cloth, produce, this may be in every batch of grey cloth, the one of the main reasons of the LCD alignment characteristic changing after the friction.Therefore, the base fabric tissue of friction cloth, it is very important that the effect of employing temperature, humidity all is difficult to the material that is out of shape.In addition, in order easily to carry out the cut-out of correct significant angle, the part of the bottom line by will forming base fabric, the colo(u)r streak different with other bottom lines, put into the base fabric tissue at certain intervals, be to make one of preferred form that the cColor-cycling ground of base fabric tissue changes,, can use the black conductive synthon of rubbing into carbon dust as colo(u)r streak.

Using under the situation of hydrophobic synthetic fibre, can use base fabric and the pile that inweaves in the base fabric constitutes velveting under the fluffing state as rubbing cloth material.Pile is that long fibre or staple fibre are all passable.As the velvet tissue that in rubbing cloth material, uses, be generally the velveting (12: pile, 13: warp, 14: parallel) of fastening line pile shown in Figure 7.In addition, also can use the velveting (12: clipping, 13: warp, 14: parallel) that in pile, uses the V font pile (clipping) shown in Figure 8 of staple fibres such as cotton.In the present invention, in the warp and parallel or of these velveting base fabric tissues, use hydrophobic synthon, can obtain foregoing effect.

Secondly, the situation of melt process cloth end face is described.In this case, preferably will use the fiber of thermoplasticity such as dacron or hot melt property to make in the warp of base fabric tissue and in the parallel one or both.

Figure 12 for the direction of the end warp almost parallel of the velveting of knitting system by the tissue of Fig. 1 on the figure that makes with electron micrograph of cross section under the situation of normal temperature die cutting.Figure 13 is to the cross section under velveting fusion severing (melt process) situation identical with Figure 12, the figure that makes with electron micrograph.Specifically, Figure 12 and Figure 13 are based on after the normal temperature severing of rubbing cloth material of embodiment D1 described later and the electron micrograph of the end face after the fusion severing.

Melt process as the end face of rubbing cloth material has two modes preferably at least.A preferred form is the mode that heat is given the severing sword.Specifically, crush-cutting rubbing cloth material under the state of the temperature of rising severing sword, the end face of the fiber cut off of fusion thus, another preferably mode be to utilize the method for laser radiation.Specifically, utilize laser radiation to improve the temperature of tissue fibers, make fibers melt and severing.In addition, also have at normal temperatures the severing rubbing cloth material after, carry out the method for melt process as aftertreatment heating cutting surface.

The treatment temperature of melt process can suitably determine according to the kind of the bottom line of cloth, end fabric tissue, velvet head line.In the form that severing sword heat gives, in order to make line distortion and to cut off, usually its temperature preferably the fusing point with bottom line be the center in the scope of the low temperature of 50 ℃ high temperature to 20 ℃.In addition, in order to shorten break time, preferably the fusing point with bottom line is the center, in the scope of the low temperature of 15 ℃ high temperature to 10 ℃.In the form of laser radiation,, therefore do not need special design temperature owing to the direct fusion of cloth end face.

Under the situation of melt process cloth end face, as the warp and the parallel of the base fabric of rubbing cloth material, can use dacron, mekralon, polyamide fibre, polyvinyl chloride fibre, poly-inferior vinyl chloride fibers, vinylon fiber, fluorine fiber, aramid fibre etc.Particularly in the bottom, use thermoplasticity or hot melt property fiber to knit under the situation of system, utilize melt process that end face is melted, can reduce coming off of pile bits and bursting forth of warp or parallel.

In the rubbing cloth material (grey cloth) of above-mentioned tissue, utilize thermoplasticity or hot melt property fiber to constitute the base fabric parallel, if when cutting out or cut out after heat melt process end face, then can prevent coming off and bursting forth of pile fully by desirable size.

Velvet cloth compound is become with respect to 0 ° of the one-tenth of warp, and 5 °, 10 °, 15 °, 30 °, 45 cuts into wide 5cm, long 30cm makes test film.Under the situation of the drawing stress that adds 5kg on each test film, from each angle of the warp of each cloth, the elongation under expression standard state and the sucting wet state.Measure according to this, know the elongation dependence and the anisotropy of humidity (particularly to) of base fabric tissue.In table 1, implement A1 and A2 test portion tissue and the cuprammonium rayon of use Fig. 7 velvet organize identical.In addition, the test portion of embodiment A 1 and A2 all uses 84 dtex Triafol Ts in pile, uses the polyester of 110 dtexs in end warp.The length of pile is 1.8mm.In addition, the test portion of embodiment A 1 uses the polyester of 84 dtexs, the test portion of embodiment A 2 to use boiling water shrinkage to be about the high retract line of the polyester of 35% 84 dtexs in the back weft line in bottom line; Be coated with resin overleaf based on acrylic resin.

The test portion of Comparative examples A 1 uses cloth to use the rayon velvet of the cuprammonium rayon of market sale in bottom line as existing liquid crystal friction.

As a result, under standard state, for the elongation of the stress of 5kg/5cm, the angle of warp is 10 ° relatively, and embodiment A 1 and A2 and Comparative examples A 1 do not have big difference.When surpassing 15 °, significant difference obviously appears between embodiment A 1 and Comparative examples A 1 more.Elongation under the sucting wet state, the elongation of the embodiment A 1 of use dacron is lacked than the Comparative examples A 1 of using cuprammonium rayon significantly in bottom line.In all cases, demonstrate the test portion that in parallel, uses the embodiment A 2 of high retract line, than the difficult elongation of the test portion of embodiment A 1.Therefore, as the dimensional stability of rubbing cloth material, in embodiment A 1 and A2 and Comparative examples A 1, be preferably embodiment A 2＞embodiment A 1＞Comparative examples A 1 successively.

Table 2 is the angle of inclination (organizing the angle of vertical direction for base fabric) of the pile that utilizes velvet of the present invention and knit the system of the knitting condition of the velvet that pile that system tissue makes rubbing cloth material tilts and observe on opposite length direction.

After knitting system,, utilize common manufacturing procedures such as removing paste is purified, xeothermic, back side process of resin to carry out finishing, obtain rubbing cloth material velvet cloth 150 ℃ of down setting.

The level of the generation static of comparative evaluation rubbing cloth material of the present invention at first, is under 60% the state, with the alignment film of various friction cloth friction liquid crystal in humidity.At this moment, approach (d among Fig. 5) is 0.5mm, utilizes mensuration with voltage, the static content that produces on roller when estimating friction.

The material of embodiment A 9 is identical with embodiment A 8 in the back side of the test portion of embodiment A 7, and the electroconductive resin back of the body of sneaking into carbon particle (powder) in resin pastes processing.In the test portion of this embodiment A 9, the most pronounced effects of reduction with voltage, like this, static can more promptly be emitted to above-mentioned electroconductive resin, therefore can be from the whole discharge in the back side of rubbing cloth material.In addition, because the base fabric of the test portion of embodiment A 7 organizes length direction to have black muscle to expose, therefore cut off the size that is attached on the roller easily (promptly; Determine cutting direction easily).Use other advantages of dacron and the high retract line of polyester to be in bottom line, utilize the severing of the hot sword (～250 ℃) of base fabric tissue to carry out easily, section is bonding voluntarily not to need aftertreatment.

By in the parallel of base fabric tissue, using high (synthesizing) fiber that shrinks to knit the grey cloth of system, under the state of the distortion of restraining Width (weft direction), carry out dry heat treatment, can reduce the inclination of parallel, below this point of explanation.

The system of knitting test portion to embodiment A 10 and reference example A1 carries out under 150 ℃ 5 minutes heat treated.Embodiment A 10, contraction is limited in 5% with interior state under, handle to have the test portion that 12.3% character of shrinking is arranged under free state on the cloth Width.In reference example A1, produce this contraction hardly.Here, the degree of crook with parallel is following such definition as oblique value Z.That is: with reference to Fig. 6 (a), Fig. 6 (b), the height Y that parallel is entered in the degree of crook up and down of parallel of warp per unit length X is defined as oblique value Z

As described below, under the system of the knitting condition shown in the table 5, make rubbing cloth material of the present invention, measure its pile angle of inclination (organizing the angle of vertical direction for base fabric).

In the rubbing cloth material of the Embodiment B 1～B4 that makes under the above system of knitting condition, measure each pile angle of inclination, the result is as shown in table 5.Only can find out and just can obtain different pile angles of inclination by working hard from these results in the system condition of knitting.About the angle of inclination, measure for the base fabric surface normal for the warp direction inclination angle.Specifically, the principal element at decision angle of inclination is the sendout of end warp and the Tension Difference of warp of the resultant end.The density of the thickness of bottom line, back weft line (because the thickness back weft line density of parallel has the upper limit).By controlling these, the fabric at thus can be usually identical with the system of stably knitting repeatedly pile angle of inclination.

Now utilize the discovery situation of the vertical muscle of method evaluation friction shown in Figure 5, that is: the rubbing cloth material of Embodiment B 1～B4 is wrapped on the friction roller 1 of stainless steel of Φ 50mm with the double-sided adhesive band respectively, on the square glass substrate of 10cm, printing coating polyimide precursor solution.To adhere to 200～300 ℃ down the glass substrates 5 of the polyimide system alignment film made of heating be fixed on the transfer table 6, getting approach d is 0.5mm, moves transfer table 6 with the speed of 30mm/ second in the direction of arrow, rubs.The rotation number of friction roller 1 is 1500rpm.As a result, all rubbing cloth materials all obtain the vertical few even alignment film of muscle.

As described below, as velvet head line, use triacetate or dacron, or use high retract line as the few end warp of sendout, make rubbing cloth material of the present invention, measure its pile angle of inclination.

In Embodiment B 5, the polyester two-wire that uses 56 dtexs is as end warp, is under 100 the situation at the line length of fetching and delivering the few warp of output, and the line length of the warp that sendout is many is 280 to knit system.At this moment tension force, the former is 104～110g, the latter is 65～70g.The triacetate two-wire that uses 84 dtexs is as velvet head line.After knitting system,, purify by removing paste 150 ℃ of down setting, common manufacturing procedure such as xeothermic, back side process of resin carries out finishing, obtains rubbing cloth material (velvet cloth).

In Embodiment B 6, (boiling water shrinkage is 35% to use the high-contraction polyester two-wire of 56 dtexs, JISL-1013) as the few bottom line line of sendout, use the polyester two-wire that shrinks few 56 common dtexs as the many end warps of sendout, be under 100 the situation in the former line sendout, the latter is 120, and the tension force both when knitting system is 100g～110g, much at one.Use the triacetate two-wire of 84 dtexs to be velvet head line.After knitting system, 150 ℃ of following dry heat treatment 5 minutes.When carrying out this thermal treatment, 12% over feed rate(OFR) (overfeed) is arranged on the cloth length direction, after obtaining 2% width on the Width, utilize common manufacturing procedure to carry out finishing and obtain rubbing cloth material.In Embodiment B 6, by being heat-treated, the high polyester two-wire that shrinks shrinks the ratio that changes line length, and make pile have the angle of inclination.

In Embodiment B 7, except the polyester that in pile, uses 84 dtexs, also make rubbing cloth material according to the operation identical with Embodiment B 5.

With regard to the pile of the rubbing cloth material of the Embodiment B 5～B7 of above such making, measure the angle of inclination.Measurement result is as shown in table 6.Can find out from these results, raw material and the natural fiber measured, all it doesn"t matter for synthon, semisynthetic fibre, confirm and can obtain stable inclination this point, in addition, in Embodiment B 6, can obtain making the identical effect of situation of the positive change sendout of cloth contraction with using high-shrinkage fibre.

As described below, be manufactured on the rubbing cloth material of the present invention (velveting) that uses dacron, nylon fiber, mekralon in the bottom line, measure its elongation.These pile fabrics all are the systems of knitting with fabric tissue shown in Figure 7.

In Embodiment C 1, the twist was 900T.P.M under warp used in the dacron of 56 dtexs at the bottom of the operation.The doubling twisting of last twist 600T.P.M; Use the dacron of 84 dtexs as the back weft line, the density of end warp is 23/cm, and the density of back weft line is 44.5/cm.Use the triacetate processing line of the two-wire of 84 dtexs as velvet head line.Knitting making herbs into wool head length degree is the velveting of 1.8mm, carries out finishing with common job operation, there not being the side coating acrylic resin of pile, obtains rubbing cloth material.

In Embodiment C 2,, use the nylon fiber of 56 dtexs as the back weft line as the doubling twisting of end warp twist 600T.P.M on following twist 900T.P.M in the nylon fiber line at 56 dtexs.End warp density is that 23/cm, back weft line density are 52/cm.Knit making herbs into wool length as velvet head line and be the velveting of 1.8mm, carry out finishing with common job operation, do not having a side of pile cloth, the coating acrylic resin obtains rubbing cloth material.

In Embodiment C 3, warp uses the doubling twisting that descends twist 450T.P.M on the twist 750T.P.M in the line of mekralon 56 dtexs as the back weft line at the bottom of the operation, uses 56 minutes mekralon as the back weft line.End warp density is 23/cm, and the back weft line density is 45/cm.Use the triacetate processing line of 84 dtexs as velvet head line.Knitting making herbs into wool head length degree is the velveting of 1.8mm, carries out finishing with common job operation, and in cloth one side that does not have pile, the coating acrylic resin obtains rubbing cloth material.

In comparative example C1, use the present liquid crystal friction cloth of velveting conduct of the rayon pile of market sale.This kind velveting uses the viscose rayon yarn of 84 dtexs in end warp; In the back weft line, use the cuprammonium rayon of 66 dtexs.

In the rubbing cloth material of above Embodiment C 1～C3 that draws like this and comparative example C1, the pile and the end, dispose through line parallel.Alignment film is being carried out under the situation of friction treatment, prior art is, the sense of rotation of the roller that preferably rubs and the base fabric of rubbing cloth material be 3～45 ° (No. 3209328 communique of Jap.P.) of skew through the suede angulation.

In the rubbing cloth material of Embodiment C 1～C3 and comparative example C1, become the direction of 150 ° of angles to cut off at warp direction with relative warp, obtain wide 5cm, the test film of long 30cm, when cutting off, the cloth of Embodiment C 1～C3 and comparative example C1 cloth relatively can cut off accurately.For each test film, under standard state and sucting wet state, give the drawing stress of 5kg, measure elongation at this moment, by measuring, draw the elongation dependence and the anisotropy of humidity (particularly to) of base fabric tissue.Measurement result is as shown in table 7.

In using the rubbing cloth material of hydrophobic synthetic fibre as the Embodiment C 1～C3 of bottom line, end warp direction and the test film that departs from 15 ° of directions, (AB) is all little for the elongation under standard state and sucting wet state.In addition, the elongation in the sucting wet state increases less in ratio (B/A) is 1.02～1.09 scope.On the other hand, in the rubbing cloth material of use cuprammonium rayon as bottom line of comparative example C1, under the sucting wet state, elongation is easy, and particularly under situation about cutting off on the tilted direction, stress causes elongation easily.

In Embodiment C 4, as twist 900TPM under warp use in the end is in the dacron line of 56 dtexs, the doubling twisting of last twist 600TPM; Use the poly-vinegar fiber of 84 dtexs as end warp.End warp density is 23/cm, and the back weft line density is 45.5/cm.As velvet head line, use the two-wire of No. 60 cotton combing machine lines.Knitting making herbs into wool head length degree is the velveting of 1.8mm, carries out finishing with common job operation, and the resin at the cloth one side coating acrylic acid series that does not have pile obtains rubbing cloth material.

The Thomson sword that utilizes the steel of the Na カ ヤ マ of Co., Ltd. system to make carries out die cutting, and it is that 468mm, Width are the size of 1200mm that the cloth severing of Embodiment C 4 and comparative example C1 is become the cloth length direction.As the processing before the rubbing cloth material appropriateness being attached to the friction roller, can remove lip-deep cotton impurity, other solid shape impurity and check operation at friction cloth.As a result, in embodiment 4, the amount of impurity obviously reduces, and the activity duration is about 1/6 of comparative example C1, and operation is rationalized significantly.

At first make the rubbing cloth material that the fabric tissue by Fig. 1 constitutes.Use the doubling twisting two-wire of the dacron of 56 dtexs as end warp; Use the dacron two-wire of 84 dtexs as the back weft line, use cotton No. 60 two-wire as velvet head line, knitting making herbs into wool head height degree is the velveting of 2.5mm.The density of end warp is every cm35 root, and the density of back weft line is every cm75 root.Obtain the cloth that rubs at the cloth one side coating acrylic resin that does not have pile.Secondly, utilize the S50C steel of the Na カ ヤ マ of Co., Ltd. system to make thickness and be 1mm, the blade tip tapering is 35～40 ° a severing sword, and energising produces heat to well heater, with warp almost parallel ground, end fusion severing rubbing cloth material.This moment, the temperature of blade tip was 265 ± 5 ℃.

At first, make the rubbing cloth material that the fabric tissue by Fig. 7 constitutes.The doubling twisting two-wire of dacron that uses 56 dtexs is as end warp, and the polyester that utilizes 56 dtexs is as the back weft line, and the triacetate two-wire that utilizes 84 dtexs is knitted the throwing pile fabric as velvet head line.The density of end warp is 23/cm, and the density of back weft line is 45/cm.Be coated with acrylic resin in cloth one side that does not have pile, obtain rubbing cloth material, secondly, use the severing sword identical with embodiment D1, produce heat to well heater energising, with end warp almost parallel with depart from the direction of 15 ° of the end warps fusion severing rubbing cloth material, at this moment, the temperature of blade tip end is 245 ± 25 ℃

The rubbing cloth material that making is made of the fabric tissue of Fig. 7.As end warp and back weft line, at nylon fiber (nylon 6) with 56 dtexs (17 threads), end warp uses the twist 900 commentaries on classics/m down, the doubling twisting of the last twist 600 commentaries on classics/m, end warp density is 23/cm, the back weft line density is 47.5/cm, uses the triacetate two-wire of 84 dtexs as velvet head line.Knit the throwing pile fabric, carry out finishing, obtain rubbing cloth material with common job operation.Secondly, uses the severing sword identical with embodiment D1, to well heater energising produce hot, with end warp almost parallel and the direction that departs from 15 ° of end warps on fusion severing rubbing cloth material.At this moment, the temperature of blade tip is 210 ± 5 ℃.

At first, make the rubbing cloth material that the fabric tissue by Fig. 7 constitutes.As end warp and back weft line, use the mekralon of 56 dtexs (24 threads), end warp conduct is the twist 750 commentaries on classics/m down, the doubling twisting of the last twist 450 commentaries on classics/m uses, and end warp density is 23/cm, and the back weft line density is 42/m, use three acetic acid two-wires of 84 dtexs as velvet head line, knit the throwing pile fabric, utilize common job operation to carry out finishing, obtain rubbing cloth material.Secondly, uses the severing sword identical with embodiment D1, to well heater energising produce hot, with end warp almost parallel and the direction that departs from 15 ° of end warps on fusion severing rubbing cloth material.This moment, the temperature of blade tip was 160 ± 5 ℃.

At first, prepare the rubbing cloth material of the cotton of the market sale that the fabric by Fig. 8 constitutes.The end warp of these market sale product, back weft line and velvet head line all are made of No. 40 two-wires of cotton.Pile length is 2.5mm.The back side of this cloth is resinous coat with vinyl acetate.Secondly, prepare the Thomson sword made by the steel of Na カ ヤ マ Co., Ltd. system, with the direction of 15 ° of end warp almost parallel and irrelevance warps on use the die cutting rubbing cloth material.At this moment blade tip temperature is a normal temperature.

Evaluation utilizes the rubbing cloth material end face of velvet cloth friction severing, the situation that visual pile comes off in embodiment D1～D4 and Comparative Example D 1.

In the rubbing cloth material that carries out the disconnected embodiment D1～D4 of fusion, with the fusion severing of warp almost parallel ground, the end with depart from fusion severing on 15 ° of directions of warp,, nearly all cannot see pile and come off owing to the bottom line melting deformation.

Relative therewith, in the rubbing cloth material of the Comparative Example D 1 of carrying out the normal temperature die cutting, because the warp and the parallel of base fabric are not whole fusions, the root of pile utilizes is resin-coatedly knitting fixedly base fabric of the system tissue and the cloth back side, but causing by die cutting on the part of base fabric disorganization, the pile root is fixing insecure, therefore roughly blocking abreast and departing from severing on the direction of 15 ° of end warps with end warp, can see that all pile comes off more, therefore, utilize the rubbing cloth material of Comparative Example D 1, the friction LCD alignment film the time, pile may come off.

Remember when your LCD or OLED display had that brand-new, fresh-out-of-the-box shine, feel and look? You are in the right place if your display is now due for deep cleaning.

A microfiber cloth and distilled water is recommended for cleaning the display glass. Use Qtips and Isopropyl alcohol for cleaning the printed circuit board.

Although distilled water is recommended for wiping the display glass, you can use a cleanser developed explicitly for cleaning displays. However, do not spray it directly onto the display. Spray a tiny amount of the cleaner onto a microfiber cloth first to avoid getting any cleaning solution inside the display.Never spray any liquids directly onto the display.A spray is too hard to control and confine. The fluids can seep into the other display layers or surrounding components and cause irreversible liquid damage.

Only use a microfiber cloth and don"t use chemicals to clean a resistive touchscreen.Disconnect the display from the power supply and remove any screen protectors or liners.

Isopropyl alcohol (IPA) is widely used to clean printed circuit boards (PCBs). Use a Q-tip or soft small bristle brush for scrubbing a PCB, and never use a paintbrush.Gently rub a Q-tip in Isopropyl alcohol.

Cleaning soldering residue on LCD with Isopropyl alcohol and a Q-Tip.Cleaning residue around soldering elements is not necessary if Newhaven Display performed the soldering.

I used yet another clean cloth and that seemed to get rid of everything. Re-assembled the phone and the touch screen works and looks great! But now my home button doesn"t work :(. After re-disassembling I found one of the tiny sensitive little spring contacts for the button had broken off inside the phone. I think the only way to fix it is to solder a pin about 1/16th inch long onto the contact to get it to press against the other contact point on the phone. Otherwise I could tear off the digitizer and glass I just replaced and replace the whole home button assembly...

Don"t make the mistake of thinking that LCD screens work like your nifty new iPad. In general, touching should be off limits because pressing too hard on the screen can actually break or crack pixels. So the first rule to cleaning an LCD screen is don"t do it unless you have to (i.e. unless it"s actually dirty).

Many retailers offer special cleaning solutions for LCD screens, but the truth is that most of these are made up primarily of water. So, if you don"t want to take the time to go buy a cleaner or you want to save the money (maybe to put toward that "What Not to Wear" dress), you can just make your own LCD cleaner by mixing water with some vinegar or isopropyl alcohol -- the solution should be no more than 50/50.

Unless you want to end up with a melted, discolored, hazy or scratched LCD screen, steer clear of all spray cleaners. In particular, don"t use any solvent cleaners that include acetone, ethyl alcohol, ethyl acid, ammonia or methyl chloride. You also want to avoid using any materials that could potentially scratch the screen"s delicate surface. Opt for a soft, clean, cotton cloth instead of wood-based products like paper towels and tissues. Chipman suggests using a microfiber cloth for best results.

If you"re lucky enough to have a service come in and do your cleaning for you, make sure they don"t inadvertently ruin your television or monitor by trying to clean it with something like glass cleaner. You should either take the time to explain -- and maybe even demonstrate -- how you want your LCD screen cleaned or just ask your cleaner to leave this particular job for you.

Keeping your precious rugged LCD monitors or LED screens clean and tidy can be challenging. This is especially true if you happen to have handsy young children who like to touch everything or pets running amuck in your household or even if you happen to work in a particularly messy environment such as a construction site or restaurant. Sometimes, rogue bits of debris can attach themselves to your electronic devices and while this is entirely out of your control for the most part, there are a few effective and harmless cleaning solutions you can put into practice to keep your electronics clean and running smoothly. Continue reading to learn about helpful tips for cleaning your LCD and LED screens without causing internal or external damage.

Before you can get down to the cleaning part, you need to prepare your LCD or LED screen in order to reduce the risk of liquids penetrating the surface and causing internal damage. Keep in mind that modern screens might technically include higher end features than the old school CRT screens from your childhood, but that doesn’t necessarily mean they’re more durable. In fact, modern LCD and LED screens are actually a lot more fragile and easily susceptible to damage if they’re not cared for properly. To prepare the screen for cleaning, make sure you shut down the system entirely, disconnect it from its power source, and then let it cool down for a few minutes. This will reduce the risk of electrocution and it’ll make it easier to clean the screen without resulting in annoying and unattractive streaks.

Occasionally, you’ll have to contend with a tough spot, streak, or fingerprint marking that takes a little extra effort to clean. If this happens, don’t panic and definitely don’t press down harder with a cloth or try to scrape it off with your fingernails or any other tool as this can cause severe damage to the top layer or anti-gloss coating. The best thing to do is use a non-abrasive cleaning solution such as isopropyl alcohol that’s diluted with either pure or distilled water. Spray the solution onto a microfiber cloth and gently wipe down the area in either an up and down or side to side motion. Applying too much pressure to even the most rugged touchscreen can compromise its limited durability.

There are a few types of cleaning cloths you can use to wipe down your rugged LCD monitor either at home or at work. The most recommended one is microfiber cloth for a multitude of reasons. First, microfiber is a state-of-the-art technological development that’s a thin and soft, yet strong enough material to thoroughly clean your electronic devices without risking damaging them in any way. Most of the time, computer and flatscreen TV manufacturers provide microfiber cloths with their products along with a specific set of maintenance and cleaning instructions. Microfiber cloths are immune to collecting or spreading lint across your screen, and because of the intricate way in which the minuscule fibers are intertwined these cloths are able to trap larger quantities of dirt and dust without leaving streaks. You can also use a cotton tea towel, a cotton t-shirt, or cotton handkerchief if you’re in a bind and don’t have microfiber cloths on hand.

This point can’t be emphasized enough. Even though it may seem like common sense that electronic devices shouldn’t come into direct contact with any liquids (especially if they’re still plugged in), not everyone seems to think so and many people have made the mistake of spraying cleaning agents onto their devices. The safer and smarter way to clean any rackmount LCD display is by first wiping it down with a dry cloth and then spraying a small amount of the cleaning solution onto a different cloth and wiping it down gently. After you do this, wipe it down with a clean dry cloth to remove any remaining liquid.

Always avoid using ammonia or rubbing alcohol based cleaners on your touchscreen devices. The devices themselves might be constructed with the capability to withstand most types of damages, but certain features they possess aren’t. Ammonia and rubbing alcohol can irreparably strip away or damage the extremely delicate anti-glare coating on the screen, which will not only negatively alter your viewing experience but also make your device a lot harder to use in strong sunlight.

For extra measure, you can also spray the surface of your screen, computer keyboard, or even the vent on the back of the device with a can of compressed air to blast away any lingering and stubborn debris or dust. If any of it lands on the surface of the device, make sure to gently wipe it away with a clean cloth to prevent it from making its way back into your device. Implementing this cleaning method on a regular basis will ultimately help to guarantee the longevity and functionality of your device.

Nauticomp Inc. is the proud designer, manufacturer and distributor of countless rugged LCD and LED monitors and displays. We’ve been working in the technological industry for more than 20 years and supply a variety of businesses including marine bases, military bases, restaurants, casinos, retail stores, shopping centers, and healthcare facilities with durable and high-quality LED and LCD displays that serve a wide range of purposes. For more information about our company or our products, please feel free to contact us.

Start the remote control cleaning by removing the batteries. As with the TV screen recommendations, you’ll want to avoid spraying directly onto the surface, as this could cause the device to malfunction. Dampen a clean microfiber cloth and rub gently on the top and the underside of the remote control. For hard-to-reach gunk that’s jammed between the buttons, try a cotton swab dipped in a small amount of the cleaning solution. Make sure to let it dry thoroughly before replacing the batteries and using it again.

Williams likes TV cleaning kits for their ease of use. “A TV kit will be your safest option for cleaning a TV,” he says. “These kits will come with everything you need to get your TV looking new, like screen-cleaning solvent and a fast-drying microfiber cloth.” You can find TV cleaning kits and cleaning products designed for flat-screen TVs at electronics stores or on Amazon.

If you can picture the hulking tube TVs (also known as CRTVs) of yore, you may also remember how delightfully easy they were to clean—a few spritzes of window cleaner and some wipes with paper towels and you were good to go—no special microfiber cloth required. But modern TVs with fancier technologies like LCD, OLED, and plasma call for gentler techniques. “Avoid using chemicals like alcohol, ammonia or acetones when cleaning your TV. These cleaners were safe to use for previous generations of TVs with glass panels, but as the hardware changes with time, the cleaning methods do too,” says Williams. Since some multi-purpose and glass cleaners are made with ammonia, skip the Windex.

Modern TVs are often smart TVs but the cleaning tips are the same as the ones for LCD, OLED and plasma TVs. The microfiber cloth is your TV screen’s best friend. “The majority of TVs you purchase today will be smart TVs, and the cleaning process is the same as TVs without smart capabilities,” Williams says.

The present invention relates to a method for fabricating a liquid crystal display (LCD) device. More particularly, the present invention relates to an apparatus and method for rubbing an alignment layer of an LCD device, in which rubbing uniformity of the alignment layer is improved.

Generally, LCD devices are widely used for clocks, calculators, monitors for PCs, notebook computers, TVs, monitors for spacecraft, PDAs, cellular phones, etc. LCD devices are used because of their characteristics and they have the advantages of low voltage driving, low power consumption, full color, thin profile, and lightness in weight.

An LCD panel may include a thin film transistor (TFT) substrate provided with a TFT array, a color filter (CF) substrate provided with a color filter array, and a liquid crystal layer formed between the two substrates. Alignment layers may be respectively provided on each surface of the TFT substrate and the CF substrate to face each other. The alignment layers determine an alignment direction of the liquid crystal layer.

The CF substrate may include a black matrix layer that prevents light from reaching the pixel regions, R/G/B color filter layers corresponding to the respective pixel regions to display various colors, and a common electrode formed on the entire surface including the color filter layers. The common electrode may be formed on the TFT substrate in an in-plan switching (IPS) mode LCD device. An alignment process may then be performed for the alignment layers of the TFT substrate and the CF substrate to arrange liquid crystal molecules.

An example of the alignment process includes a rubbing method in which a surface of an alignment layer is rubbed with a rubbing cloth. The rubbing cloth is adhered to an outer circumference of a roller. If the roller is rotated, the rubbing cloth adhered to the outer circumference of the roller contacts the surface of the alignment layer so that the surface of the alignment layer is rubbed with the rubbing cloth.

If liquid crystal molecules are arranged along a direction of the alignment layer rubbed with the rubbing cloth, it may be possible to obtain uniform display characteristics.

FIGS. 2A to 2C illustrate a related art process for rubbing an alignment layer. FIG. 2A is a perspective view illustrating an apparatus for rubbing an alignment layer, FIG. 2B is a side view illustrating an apparatus for rubbing an alignment layer, and FIG. 2C is a plan view illustrating an apparatus for rubbing an alignment layer.

As shown in FIGS. 2A to 2C, the related art apparatus for rubbing an alignment layer includes a cylindrical rubbing roller 61, a rubbing cloth 62 adhered to an outer circumference of the rubbing roller 61 using a double-sided tape, a rotary shaft 63 connected with both sides of the rubbing roller 61 and rotated along one direction while supporting the rubbing roller 61, and a rotary motor 66 connected with the rotary shaft 63 to rotate the rotary shaft 63.

The rubbing roller 61 connected with the rotary shaft 63 contacts the alignment layer 65 of the substrate 64 loaded on the stage 60 at the bottom, and forms a groove on a surface of the alignment layer 65 while being rotated by the rotary motor 66 in one direction.

That is, the related art rubbing process is performed in such a manner that the rubbing roller 61 wound with the rubbing cloth 62 is rotated to rub the surface of the alignment layer 65 using physical friction.

In order to obtain uniform display characteristics in the LCD device, it is important that the groove is uniformly formed in a wide area. The groove can uniformly be formed by rubbing the surface of the alignment layer with the rubbing cloth at uniform pressure and speed to align a high molecular chain on the surface of the alignment layer in a certain direction.

The aforementioned related art method for rubbing an alignment layer uniformly arranges the liquid crystal molecules by rubbing the alignment layer with the rubbing cloth. The related art method also uniformly displays images on the entire surface of the LCD device by arranging the alignment layer in one direction.

However, with the trend towards larger sized LCD devices, LCD devices having dimensions of 1100 mm or greater have been commercially used. Under these circumstances, the rubbing roller used for the rubbing process is contrived to have a large size.

In this case, as shown in FIG. 3, a middle portion in a longitudinal direction of the rubbing roller 61 is bent by self-load as the rubbing roller 61 of metal material has a longer cylindrical length. Also, the alignment layer 65 formed on the substrate 64 is rubbed by uneven pressure. As a result, display quality is deteriorated over the entire surface of the LCD device.

Furthermore, for the alignment process, the rubbing roller 61 is adhered with the rubbing cloth 62 using a general adhesive. Furthermore, static electricity occurs due to friction between the rubbing cloth 62 and the alignment layer 65. Friction is caused by rotation of the rubbing roller 61. For this reason, dust, dirt in the air, and/or particles generated from the rubbing cloth 62 is adsorbed into the alignment layer 65, thereby causing a pin hole.

Accordingly, the present invention is directed to an apparatus and method for rubbing an alignment layer of an LCD device, which substantially obviates one or more problems due to limitations and disadvantages of the related art.

An advantage of the present invention is to provide an apparatus and method for rubbing an alignment layer of an LCD device, in which the alignment layer is rubbed over an entire surface of a substrate at uniform pressure.

Another advantage of the present invention is to provide an apparatus and method for rubbing an alignment layer of an LCD device, in which dust and/or particle is not adsorbed into the alignment layer during the rubbing process.

To achieve these and other advantages and in accordance with the purpose of the invention, as embodied and broadly described, an apparatus for rubbing an alignment layer of an LCD device includes a rubbing means to rub the alignment layer while the rubbing means is rotated along one direction to contact a surface of the alignment layer formed on a substrate, and a liquid jet to jet liquid when the alignment layer is rubbed by the rubbing means.

In another aspect of the present invention, a method for rubbing an alignment layer of an LCD device includes forming the alignment layer on a substrate, rubbing the alignment layer by rotating a rubbing roller adhered with a rubbing cloth while moving the substrate provided with the alignment layer in one direction, and simultaneously jetting liquid using a liquid jet.

FIGS. 6A and 6B are side views illustrating a rubbing roller in an apparatus for rubbing an alignment layer of an LCD device according to a third exemplary embodiment of the present invention;

FIGS. 7A and 7B are perspective views illustrating a rubbing roller in an apparatus for rubbing an alignment layer of an LCD device according to the third exemplary embodiment of the present invention;

FIG. 9 illustrates a rubbing process performed when a middle portion of a rubbing roller bends when an alignment layer of an LCD according to an exemplary embodiment of the present invention is rubbed.

As shown in FIG. 4, the apparatus for rubbing an alignment layer of an LCD device according to a first exemplary embodiment of the present invention includes a cylindrical rubbing roller 101, a rubbing cloth 102 that may be adhered to an outer circumference of the rubbing roller 101 using a double-sided tape, a rotary shaft 103 connected with both sides of the rubbing roller 101, a rotary motor 104 connected with the rotary shaft 103, and a liquid jet 110. The rotary shaft 103 may rotate along one direction while supporting the rubbing roller 101 and the rotary motor 104 may rotate the rotary shaft 103 along one direction. The liquid jet 110 may jet liquid onto a substrate 100 during rotation of the rubbing roller 101.

Also, the rubbing roller 101 may include an inner cylinder of carbon fiber reinforcing plastic and an outer cylinder of plated stainless steel. A rubbing cloth is adhered to a surface of the plated stainless steel using a conductive adhesive.

The rubbing roller 101 connected with the rotary shaft 103 contacts the alignment layer 120 of the substrate 100 loaded on the stage 200 at the bottom. The rotary shaft 103 is rotated in one direction by the rotary motor 104 to rotate the rubbing roller 101. The rubbing cloth 102 adhered to the rubbing roller 101 forms a groove on a surface of the alignment layer 120.

The rubbing process is performed in such a manner that the rubbing roller 101 wound by the rubbing cloth 102 is rotated to rub the surface of the alignment layer 120 using physical friction.

As described above, the rubbing process is performed in such a manner that a groove is formed on the surface of the alignment layer 120 using the rubbing apparatus while the liquid is being jetted onto the entire surface of the substrate 100 using the liquid jet 110. The middle portion of the rubbing roller 101 is filled with the liquid even if it is bent. Therefore, it is possible to uniformly perform the rubbing process.

In the apparatus for rubbing an alignment of an LCD device according to a first exemplary embodiment of the present invention, the liquid jet 110 jets the liquid onto the substrate 100 provided with the alignment layer 120. In the apparatus for rubbing an alignment of an LCD device according to a second exemplary embodiment of the present invention, the liquid jet 110 jets the liquid onto the rubbing roller 101 adhered with the rubbing cloth 102.

As shown in FIG. 5, the apparatus for rubbing an alignment layer of an LCD device according to a second exemplary embodiment of the present invention includes a cylindrical rubbing roller 101, a rubbing cloth 102 that may be adhered to an outer circumference of the rubbing roller 101 using a double-sided tape, and a liquid jet 110. The liquid jet 110 jets liquid 114 onto the rubbing roller 101.

A method for rubbing an alignment layer using the aforementioned apparatus according to a second exemplary embodiment of the present invention will now be described.

The rubbing roller 101 connected with the rotary shaft 103 contacts the alignment layer 120 of the substrate 100 loaded on the stage 200 at the bottom. The rotary shaft 103 is rotated in one direction by the rotary motor 104 to rotate the rubbing roller 101. The rubbing cloth 102 adhered to the rubbing roller 101 forms a groove on a surface of the alignment layer 120.

The rubbing process is performed in such a manner that the liquid 114 is jetted onto the rubbing roller 101 provided with the rubbing cloth 102 using the liquid jet 110 when the alignment layer 120 is rubbed using the rubbing apparatus according to a second exemplary embodiment of the present invention.

As de