KR100666730B1 - System For Rolling Rubbing Cloth Using Liquid Crystal Device Panel - Google Patents

Abstract

The present invention relates to a rubbing cloth wrapper for a liquid crystal display panel, and more particularly, a rubbing cloth roll for a liquid crystal display panel for uniformly winding and aging a rubbing cloth used in a rubbing process of a substrate for a liquid crystal display panel to a roller. It's about giving up.

LCD, alignment film, rubbing process, rubbing cloth aging, winding machine

Description

System For Rolling Rubbing Cloth Using Liquid Crystal Device Panel}

1 is a plan view of a rubbing cloth winding machine according to the present invention.

2 is a front view of the rubbing cloth winding machine according to the present invention.

Figure 3 is a side view of the rubbing cloth winding machine according to the present invention.

Figure 4 is a block diagram of a control unit of the rubbing cloth winding machine according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10-Roller 20-Loving Cloth

100-Mainframe 110-Linear Guide

120a, 120b, 120c-Position Sensor

200-Loading Unit 210-Fixed Jig

220-Jig Transfer

300-Winding Table 310-Elastic Mat

320-blackout mat

400-Aging table 410-Vacuum inlet

420-glass substrate

500-Drive Unit 510-Drive Frame

520-clamping means 522a, 522b-clamping chuck

524-Pneumatic Cylinder 530-Shanghai Sudan

532-Ball Screw Mechanism 534-Servo Motor

536-Electric belts 540-Rotating means

550-Fixture 560-Position Block

600-Control Unit 610-Control Unit

620-Control Button 630-Storage

The present invention relates to a rubbing cloth wrapper for a liquid crystal display panel, and more particularly, a rubbing cloth roll for a liquid crystal display panel for uniformly winding and aging a rubbing cloth used in a rubbing process of a substrate for a liquid crystal display panel to a roller. It's about giving up.

A typical liquid crystal display panel is formed by sealing an upper substrate and a lower substrate facing each other at predetermined intervals, and injecting liquid crystal between the upper substrate and the lower substrate. The upper substrate has a color filter layer and a transparent electrode layer formed on an upper surface of the glass substrate, and an alignment layer formed thereon. In addition, the lower substrate also has a transparent electrode layer and a thin film transistor formed on the upper surface of the glass substrate, and an alignment layer formed thereon.

In the panel of the liquid crystal display device having the structure as described above, the arrangement of the liquid crystal molecules affected by the electric field is changed according to whether the voltage of the transparent electrode layer is applied, and the external liquid flowing into the panel of the liquid crystal display device is changed according to the change of the arrangement. It is driven by the property that light is blocked or transmitted. The panel of such a liquid crystal display device functions as a display element such as light transmittance, response speed, viewing angle, contrast, etc. according to the arrangement characteristics of the liquid crystal molecules. Therefore, the technique of uniformly controlling the orientation of liquid crystal molecules is very important. However, since the conventional liquid crystal molecules are only locally oriented, an organic polymer film is formed artificially in direct contact with the liquid crystal molecules on the transparent electrodes of the upper substrate and the lower substrate to align the liquid crystal molecules in a specific direction. It is called an alignment film and is usually formed of a polyimide polymer material. In addition, in order to improve the alignment of the liquid crystal molecules, an alignment groove is formed in the alignment layer in a predetermined direction through a rubbing process. The rubbing process refers to a process of forming a culture groove having a uniaxial orientation of a predetermined level or more on the surface of the alignment layer by winding a rubbing cloth made of melting or rayon on a roller and then contacting the roller with the alignment layer.

Uniformity of the alignment grooves formed in the alignment layer is basically affected by the state in which the rubbing cloth is wound on the roller, the grain orientation of the rubbing cloth, and the presence or absence of defects. That is, in order to improve the uniformity of the alignment groove, the rubbing cloth needs to be uniformly adhered to the roller and wound.

 Therefore, the rubbing cloth should be rolled up in a uniform state where bubbles are not generated on the bottom surface of the rubbing cloth while forming a constant gap between the two ends. If a rubbing cloth is irregularly wound on the roller or bubbles are formed on the lower surface of the rubbing cloth, it becomes difficult to uniformly form a grain of the rubbing cloth even in the aging process. In addition, the rubbing cloth wears irregularly in the rubbing process, and as a result, the uniformity of the alignment grooves formed in the alignment layer is inferior, and this non-uniform alignment groove serves as a cause of failure of the subsequent process. Therefore, the operation rate of the rubbing device according to the shortening of the life of the rubbing cloth and the resulting productivity decrease.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a rubbing cloth winding machine for a liquid crystal display panel panel by uniformly winding a rubbing cloth used in a rubbing process of a substrate for a liquid crystal display panel to a roller. do.

In order to solve the above problems, the rubbing cloth winding machine of the present invention is installed at one end between the linear guide and the linear guide on both sides of the upper surface, and the linear guide is loaded to the roller to which the rubbing cloth is wound at a predetermined position. A loading unit, spaced apart from the loading unit by a predetermined distance, an winding table on which the rubbing cloth is seated on an elastic mat mounted on an upper surface, an aging table on which a glass substrate is seated, and installed at a predetermined distance apart from the winding cloth table; And a driving unit and a loading unit, which are mounted to the upper portion of the linear guide, and which rotate and contact the glass substrate by winding the rubbing cloth on the roller by clamping the roller loaded on the loading unit to move up and down. And a control unit controlling the aging table and the drive unit. It characterized.

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

1 is a plan view of a rubbing cloth winding machine according to the present invention. Figure 2 shows a front view of the rubbing cloth winding machine according to the present invention. Figure 3 shows a side view of the rubbing cloth winding machine according to the present invention. Figure 4 shows the configuration of the control unit of the rubbing cloth winding machine according to the present invention.

Referring to FIGS. 1 to 3, a rubbing cloth winding machine for a liquid crystal display panel according to the present invention includes a main frame 100, a loading unit 200, a winding table 300, an aging table 400, and a driving unit. 500 and the control unit 600 is formed.

The main frame 100 has a box structure having a flat upper portion, and a pair of linear guides 110 are installed in parallel on both sides of the upper surface at a predetermined distance. The mainframe 100 may be formed in various shapes, but the structure is not limited thereto. In addition, the linear guide 110 may also be formed of a general rail. The loading unit 200, the winding table 300, the aging table 400, and the driving unit 500 are mounted on the main frame 100. In addition, the main frame 100, as shown in Figure 1, the position sensor 120a, 120b at a position away from the loading unit 200 and the winding table 300 and the aging table 400, which is installed on the upper surface , An identification number is indicated by " 120 " The position sensor 120 is installed in the movement path of the drive unit 500 to detect the movement position of the drive unit 500. As the position sensor 120, various sensors such as an optical sensor, a contact sensor, and a limit sensor may be used.

2, the loading unit 200 is composed of a pair of left and right, and a jig for transferring the fixing jig 210 and the respective fixing jig 210 to which the roller 10 is seated therebetween. It is formed including the conveying means 220. The loading unit 200 is installed at one end between the linear guide 110 to load the roller 10 seated on the fixed jig 210 by the jig transfer means 220 at a predetermined position. The fixing jig 210 has an “L” shape and a portion on which the roller 10 is seated is formed to be concave as opposed to the shape of the roller 10, and an end portion of the fixing jig 210 is formed to protrude upward. Will be fixed. The jig transfer means 220 is preferably formed to include a pneumatic cylinder, it is coupled to the lower portion of each fixing jig 210 to transfer the fixing jig 210 in the left and right directions. The jig transfer means 220 is fixed to the main frame 100. The jig transfer means 220 may be formed by a motor, a belt or a gear in addition to the pneumatic cylinder.

3, the winding table 300 is installed to be spaced apart from the loading unit 200 in the other end direction of the main frame 100 by a predetermined interval, and a rubbing cloth 20 is seated on an upper portion thereof. The winding table 300 is preferably formed of a surface plate of a predetermined thickness so that the rubbing cloth 20 seated on the upper side of the winding table 300 is stably supported without being shaken by the roller 10. Of course, the winding table 300 should be formed larger than the rubbing cloth 20 to be wound.

An elastic mat 310 is mounted on an upper surface of the winding table 300, and preferably, an electrostatic mat 320 is additionally attached to upper and lower portions of the elastic mat 310. The elastic mat 310 provides a predetermined elastic force when the roller 10 is in contact with the double-sided tape or rubbing cloth 20 seated on the top surface of the winding table 300 to wind the rubbing cloth 20. The roller 10 and the double-sided tape or rubbing cloth 20 is to be completely in close contact. The elastic mat 310 is formed to have a hardness (type A) of 20 to 90, preferably to have a 40 to 80. When the hardness of the elastic mat 310 is greater than or equal to 90, it is difficult for the roller 10 to be completely uniformly adhered to the double-sided tape or the rubbing cloth 20, and thus, bubbles are formed between the roller 10 and the double-sided tape or the rubbing cloth 20. Arises the problem that is generated. In addition, when the hardness of the elastic mat 310 is 20 or less, the rubbing cloth 20 is pressed and stretched by the contact load of the roller 10 and the gap between both ends after the rubbing cloth 20 is wound is not uniform. Occurs. The electrostatic mat 320 is to prevent the static electricity generated in the rubbing cloth (20).

The aging table 400 is installed to be spaced apart from the winding table 300 in the other end direction of the main frame 100 by a predetermined interval, and a plurality of vacuum suction openings 410 are formed on the upper surface of the aging table 300. The glass substrate 420 to be seated on the upper surface of 400 is fixed, and fixed by vacuum suction. A separate vacuum pump (not shown) is connected and driven to the vacuum suction opening 410.

The drive unit 500 is formed with a drive frame 510, the clamping means 520, the shanghai conveying means 530 and the rotating means 540, the linear guide 110 of the main frame 100 It is mounted on the upper part so as to be movable back and forth. In addition, the driving unit 500 may be formed with a fixing means 550 for temporarily fixing the driving unit 500 at a lower position. The driving unit 500 clamps the roller 10 loaded on the loading unit 200 to move along the linear guide 110 and winds the rubbing cloth 20 to the roller 10 to cover the glass. Aging is performed on the substrate 420.

The drive frame 510 is supported on the linear guide 110 so as to be movable and has a pair of vertical shafts 512 formed at a predetermined height and a horizontal shaft 514 horizontally seated on the upper portions of the vertical shafts 512. It is formed to include. The driving frame 510 supports and moves the clamping means 520, the shanghai conveying means 530, and the rotating means 540. The drive frame 510 may be formed in another configuration in addition to the above configuration.

The clamping means 520 includes a pair of clamping chucks 522a and 522b contacting both sides of the roller 10 and a pneumatic cylinder 524 for moving the clamping chuck 522a on one side from side to side. Is formed, it is supported by the shanghai transport means 530 mounted on the drive frame 510 is able to move up and down. The clamping chuck 522a of one side is rotatably coupled to the pneumatic cylinder 524 by a bearing or the like, and the clamping chuck 522b of the other side is coupled to the rotating means 540 and rotated. When the clamping means 520 is moved to the clamping position of the loading unit 200, the clamping chuck 522a of the one side is moved in the direction of the roller 10 by the pneumatic cylinder 524 and the clamping chuck of the other side is moved. The roller 10 is clamped together with 522b. The clamping chucks 522a and 522b have end portions formed in a triangular pyramid shape, and metals having high hardness, such as cemented carbide or special steel, are bonded to the ends to prevent wear due to use, and the roller 10 is easily clamped. do. Accordingly, grooves are formed at both centers of the roller 10 so that the clamping chucks 522a and 522b can easily clamp the roller 10.

The shanghai conveying means 530 is formed including a ball screw mechanism 532, a servo motor 534 and an electric belt 536 and is installed on the drive frame 510, the upper and lower clamping means 520 Will be transferred to. In addition, the shanghai conveying means 530 is preferably formed so that the lowering is controlled discontinuously when the roller 10 is in contact with the glass substrate while rotating. It is preferable that the rubbing cloth 20 is gradually brought into contact with the glass substrate in order to effectively orient the grain of the rubbing cloth 20 in the process of aging the rubbing cloth 20 wound on the roller 10. Because. For example, the Shanghai conveying means 530 controls the rubbing cloth 20 to age by keeping the roller 10 in contact with the rubbing glass substrate 420 by 0.05 mm and maintaining it for about 5 minutes for each step. do.

Referring to FIG. 1, the ball screw mechanism 532 includes a ball screw rotation shaft 532a, a linear guide 532b, and a linear block 532c, and the two vertical sides of the driving frame 510 (see FIG. 1). 514 respectively. The clamping means 520 is coupled to each of the linear blocks, and the rotating means 540 is mounted to the other linear block. The clamping means 520 and the rotating means 540 may be coupled to the linear block 532c by a separate bracket, or may be coupled to a separate reinforcement frame 538 connecting the respective linear blocks 532c. have. The ball screw mechanism 532 moves the linear block 532c up and down along the linear guide 532b while the ball screw rotation shaft 532a is rotated. The ball screw rotation shaft 532a is connected to the servo motor 534 by the electric belt 536 to receive a rotation force. The servo motor 534 is installed on the horizontal shaft 512 and is connected to the ball screw rotation shaft 532a by the electric belt 536.

The rotating means 540 is composed of a servo motor or an electric motor capable of controlling the rotation speed, and is connected to the other clamping chuck 522b of the clamping means 520 by a belt and a pulley to rotate the clamped roller 10. Let's go. The rotating means 540 may be supported by a separate bracket on the linear block 532c of the ball screw mechanism 532 or by a separate bracket on the clamping means 520.

The fixing means 550 is mounted to the lower portion of the drive unit 500 and temporarily fixes the drive unit 500 at a predetermined position of the main frame 100. When the rubbing cloth 20 wound on the roller 10 rotates in contact with the glass substrate 420 in the aging process of the rubbing cloth, the rubbing cloth 20 and the glass substrate 420 are driven by frictional force. Force to advance in the direction of rotation is generated. The roller 10 is fixed at a predetermined position by the action of the fixing means 550. The fixing means 550 may be used a variety of mechanical elements that can temporarily fix the drive unit 500 to the main frame 100, preferably a pneumatic cylinder is used. The pneumatic cylinder is installed to operate the pneumatic cylinder in the direction of the main frame 100 in the lower portion of the drive unit 500 and the pneumatic cylinder is in contact with the main frame 100 at a constant pressure to secure the drive unit 500. .

The drive unit 500 includes a position block 560 installed at the bottom, and makes contact with the position sensor 120 to recognize the position of the drive unit 500 in the control unit 600. The position block 560 may be formed in various shapes that can recognize a position to a position sensor such as a plate or bar.

The drive unit 500 is moved back and forth by the force of the operator without a separate drive means on the linear guide 110 above the main frame 100. However, when the position sensor 120 of the main frame 100 and the position block 560 of the driving unit 500 coincide with each other in order to easily set a constant work position, the control unit is configured to control the position. However, of course, the front and rear movement of the drive unit 500 can be performed by forming a separate moving means.

Referring to FIG. 4, the control unit 600 includes a control button 625 for controlling the operation of the controller 610, the loading unit 200, the aging table 400, and the driving unit 500. It is formed to include a storage unit 630 for storing various programs and information necessary for control and a transceiver 640 for transmitting and receiving signals. The control unit 610 controls the overall operations of the loading unit 200, the aging table 400, and the driving unit 500 by the signal of the control button 620 according to the operation of the operator. Since the control unit 600 is similar to the control unit 600 used in the general apparatus, a detailed description thereof will be omitted. The control button 620 may be formed integrally with the control unit 600 or may be formed as a separate control panel in a position convenient for the operator to use separately.

The following describes the operation of the rubbing cloth winding machine according to the present invention.

First, the worker seats the roller 10 in which the rubbing cloth 20 is not wound between the fixing jig 210 of the loading unit 200 and presses the control button 620 to fix the jig fixing means of the loading unit 200 ( 220) is activated. The jig fixing means 220 moves the fixing jig 210 so that the roller 10 is loaded at a predetermined position. The worker moves the driving unit 500 to the upper portion of the loading unit 200 by manual. At this time, the position block 560 of the driving unit 500 is matched with the position sensor 120a located on the side of the loading unit 200. Shanghai conveying means 530 of the drive unit 500 is lowered to a certain height by the control button 620 and the control unit 610, the clamping means 520 of the roller 10 by the operation of the pneumatic cylinder It will clamp both sides. The clamping means 520 again rises together with the roller 10 by the operation of the shanghai conveying means 630. The driving unit 500 is again conveyed to the upper portion of the winding table 300 by the worker. In this case, the position block 560 of the driving unit 500 and the position sensor 120b installed on the side of the winding table 300 are made to coincide. As described above, when the position sensor 120b and the position block 120b do not coincide with each other, they are not controlled by the control unit 600.

On the other hand, a plate-shaped double-sided tape is seated on the upper surface of the winding table 300. The double-sided tape has a paper sheet attached to both sides of the tape, and only the upper paper sheet is removed when seated on the winding table 300.

When the shank conveying means 530 descends and the roller 10 contacts the double-sided tape on the upper surface of the winding table 300, the rotating means 540 is driven to rotate the roller 10. At this time, the roller 10 is rolled up by the friction force between the roller 10 and the double-sided tape to wind up the double-sided tape. The worker repeats the above two or more times to ensure that the double-sided tape is in close contact with the roller (10). When the double-sided tape is wound on the surface of the roller 10, the remaining paper sheet of the double-sided tape is removed.

When the roller 10 on which the double-sided tape is rolled up is lifted by the shanghai conveying means 530, a rubbing cloth 20 is seated on the upper surface of the winding table 300, and the rubbing is carried out in the same order as the bonding process of the double-sided tape. The cloth 20 is wound on the roller 10. Since the upper surface of the winding table 300 has a constant elastic force by the elastic mat 310, when the roller 10 is in contact with the rubbing cloth 20, the rubbing cloth 20 is pressed to a predetermined depth so that the roller ( 10) and the rubbing cloth 20 may be in close contact more effectively. However, at this time, the rubbing cloth 20 and the roller 10 are in contact with the appropriate pressure according to the characteristics of the rubbing cloth 20. If the contact with too little pressure the rubbing cloth 20 is not evenly adhered to the roller 10, the rubbing cloth 20 is worn unevenly during the rubbing process, or to form a non-uniform orientation groove. In addition, when contacted with too much pressure, the rubbing cloth 20 is stretched, so that the gap between both ends becomes uneven or overlaps with each other after the rubbing cloth 20 is wound.

When the rubbing cloth 20 is wound on the roller 10, the roller 10 is raised by the shanghai conveying means 530. Again, the driving unit 500 is transferred to a predetermined position of the aging table 400 by the worker. In this case, the position sensor 120c is installed on the side of the aging table 400 so that the driving unit 500 can be moved to a predetermined position. When the driving unit 500 is transferred to a predetermined position, the position of the driving unit 500 is fixed by the fixing means 550 so as not to move.

The roller 10 is rotated at a constant rotational speed by the rotating means 540 and the rubbing cloth 20 wound on the roller 10 in contact with the glass substrate 420 seated on the aging table 400. Will be aged. The roller 10 is lowered to a certain height by the shanghai transport means 530 during the aging process, in which case the fixed height is lowered by a certain step. As described above, the roller 10 is lowered by 0.05 mm over 5 to 7 times, and once lowered, the rubbing cloth 20 is aged while being maintained for about 5 minutes. Thus, rubbing the rubbing cloth and the glass substrate while lowering the roller in multiple stages can prevent excessive rubbing force from being applied to the rubbing cloth from the beginning, and the contact pressure between the rubbing cloth and the glass substrate can be constant to some extent. Therefore, the grain direction of the rubbing cloth can be made uniform in the aging process. On the other hand, according to the control method of the control unit 600 and the characteristics of the rubbing cloth 20, the number of falling steps of the roller and the falling height and holding time in each step may be set differently. These variables are set and stored in the storage unit 630 of the control unit 600 and used by the control unit 610.

When the rubbing cloth 20 of the roller 10 is rubbed for a predetermined time and aging is completed, the roller 10 is lifted by the shanghai conveying means 530, and the operation of the rotating means 540 is stopped and rotated. Will stop. The driving unit 500 is transferred to the upper portion of the loading unit 200 by the operator again. The roller 10 clamped to the clamping means 520 is lowered by the shanghai conveying means 530 and is seated on the fixing jig of the loading unit 200. The roller 10 clamped by the clamping means 520 is seated on the fixing jig 210 of the loading unit 200. The roller 10 on which the rubbing cloth 20 on which the aging is completed is moved is stored in a separate place.

As described above, the present invention is not limited to the specific preferred embodiments described above, and any person having ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Various modifications are possible, of course, and such changes are within the scope of the claims.

According to the rubbing cloth winding machine for a liquid crystal display panel according to the present invention, when the rubbing cloth is wound on a roller, bubbles are not generated on the bottom surface of the rubbing cloth while both ends of the rubbing cloth form a constant gap with each other by the elastic force of the elastic mat. There is an effect of being wound up in one state.

In addition, the present invention can prevent the rubbing cloth from receiving excessive friction force from the beginning by lowering the roller by step in the aging process of the rubbing cloth, rubbing the glass cloth with uniform force to uniform direction of the rubbing cloth grain There is an effect that can be formed.

In addition, according to the present invention, the rubbing cloth is uniformly wound on the surface of the roller and the grain direction of the rubbing cloth is uniformly formed to form a uniform alignment groove in the alignment layer in the rubbing process by the rubbing cloth, and irregular wear of the rubbing cloth. By preventing the effect of improving the operation rate of the rubbing equipment and thereby the productivity is possible.

Claims (12)

A main frame having linear guides formed at both sides of an upper surface thereof; A loading unit installed at one end between the linear guides and loading a roller on which a rubbing cloth is wound at a predetermined position; A winding table which is installed spaced apart from the loading unit by a predetermined interval, and the rubbing cloth is seated on an elastic mat mounted on an upper surface thereof; An aging table spaced apart from the winding table by a predetermined distance and seated on a glass substrate; A driving unit movably mounted on an upper portion of the linear guide and clamping a roller loaded on the loading unit to move up and down to rotate the winding cloth on the roller to rotate and contact the glass substrate; And And a control unit for controlling the loading unit, the aging table, and the driving unit. The method of claim 1; The loading unit is installed in a pair on the left and right fixing jig that the roller is seated therebetween And a jig conveying means for conveying the fixing jig from side to side. delete  The method of claim 1, The elastic mat is a rubbing cloth winding machine, characterized in that the electrostatic mat is further mounted on the top and bottom. The method of claim 4, wherein The elastic mat is a rubbing cloth winding machine, characterized in that the hardness of 20 to 90. The method of claim 1, The aging table is a vacuum suction port is formed in a predetermined position on the upper surface, the rubbing cloth winding machine, characterized in that for fixing the glass substrate seated on the upper surface by vacuum suction. The method of claim 1, The drive unit A drive frame including a horizontal axis connecting the upper and lower vertical shafts which are movably mounted on the linear guide and an upper portion of the vertical axis; Clamping means for clamping the roller by the pneumatic cylinder, comprising a clamping chuck in contact with both sides of the roller and a pneumatic cylinder connected to the clamping chuck on one side to advance the clamping chuck on one side; Mounted to the drive frame, and the shanghai conveying means for supporting the clamping means to transport up and down; And a rotating means supported by the shanghai conveying means and coupled to the clamping chuck of the other side to rotate the clamping chuck and the clamped roller of the other side. The method of claim 7, wherein The drive unit includes a position block installed at the bottom, The frame includes a position sensor which is installed in the movement path of the driving unit at one side of the loading unit and the winding table and the aging table, And the control unit controls the driving unit to be driven when the position block is positioned above the position sensor according to the movement of the driving unit. The method of claim 7, wherein The Shanghai transport means And a rubbing cloth winding machine that is controlled to be discontinuously lowered when the rubbing cloth wound on the roller contacts the glass substrate while the roller is rotated. The method of claim 7, wherein The Shanghai transport means A ball screw mechanism installed on the left and right vertical shafts to which the clamping means are coupled; Servo motor installed on the horizontal axis And a driving belt for connecting the ball screw mechanism and the servomotor. The method of claim 7, wherein The drive unit is And a fixing means mounted to a lower portion to temporarily fix the driving unit to a predetermined position of the main frame. The method of claim 11, The fixing means is a rubbing cloth winding machine characterized in that it comprises a pneumatic cylinder.

Images