KR20090083768A - A remotion device of badness for a rubbing cloth - Google Patents

Abstract

A rubbing cloth fault apparatus for removing the fault of an LCD panel is provided to remove the rubbing cloth automatically by determining the location of the rubbing cloth when the rubbing cloth is sulky. A rubbing roller(20) is driven by a drive motor mounted on the outer side of a support stand. A plurality of cameras is installed for taking a picture of stereoscopic image of the rubbing roller in the front of an image acquisition unit(30). A central controller calculates the interval of the rubbing cloth which is rolled in the rubbing roller and the eccentricity of the rubbing roller by using the stereoscopic image. A removing unit(40) is arranged on the vertical line of the rubbing roller.

Description

A remotion device of badness for A rubbing cloth}

The present invention relates to a rubbing cloth removal device for automatically removing the foreign matter of the rubbing cloth by inspecting the rubbing roller for aligning the alignment film of the liquid crystal display panel. More specifically, the rubbing roller is wound around the rubbing roller by rotating the rubbing roller. Determination of defects or defects by observing the degree of deformation or contamination of the fabric, and when the rubbing cloth strands are rubbing on the rubbing cloth, the position of the rubbing cloth strand can be determined and automatically removed by rubbing roller or rubbing. The present invention relates to a rubbing cloth defect eliminating apparatus capable of preventing a defect of a liquid crystal display panel which may be caused by a defective fabric.

In general, an alignment process is performed to align liquid crystal molecules of a liquid crystal display panel.

As the orientation treatment method, a method of rubbing the surface of an alignment film with a rubbing cloth using a rubbing device configured by winding a rubbing cloth around a rotating rubbing roller is used.

Such a rubbing device is configured to rotate a rubbing roller configured by adhering a rubbing cloth to an outer circumferential surface of a roller made of aluminum or stainless steel so as to rub the surface of the alignment film while the rubbing cloth is in contact with the surface of the alignment film. Accordingly, the liquid crystal molecules are arranged to have uniform characteristics.

The rubbing cloth used in the rubbing device is generally used velvet with a fabric and fibers raised, such rubbing cloth is caused by the lining of the rubbing cloth over a long period of use, or the rubbing cloth is distorted by the elasticity of the rubbing cloth itself or Foreign matter adheres to the rubbing cloth, and the defect of the rubbing cloth causes a scratch on the surface of the liquid crystal display panel oriented by the rubbing cloth, resulting in a defect of the liquid crystal display panel.

In order to solve these drawbacks, the rubbing cloth is inspected from time to time, but the usual rubbing cloth inspection method is only a visual inspection, and thus a fine defect of the rubbing cloth cannot be found, thereby increasing the defective rate of the liquid crystal display panel.

Therefore, in recent years, a device capable of automatically detecting a rubbing cloth has been developed, but this also has a problem in that a person must directly remove the detected rubbing cloth.

Therefore, there is a need for a rubbing cloth removal device capable of automatically detecting a rubbing cloth strand by the fluff of the rubbing cloth and also automatically removing the rubbing cloth strand.

The present invention has been made in view of the above problems, the present invention is supported by a base, a support provided on both ends of the base, a rubbing roller driven by a drive motor mounted to the outside of the support; A horizontal acquisition by a linear motor installed on one side of the base, and an image acquisition unit equipped with a plurality of cameras for capturing a stereoscopic image of the rubbing roller in the front; and using the stereoscopic images captured by the image acquisition unit A central controller for calculating the eccentricity of both sides of the rubbing rollers and the gap between the ends of the rubbing cloth wound around the rubbing rollers in real time, analyzing and outputting the measured values, and storing the calculated measured values in a database; Is installed horizontally movable on the top of the base to remove foreign matter and squeaky strands of rubbing cloth, There is provided a rubbing cloth defect removal apparatus comprising a; are arranged in the vertical line of the roller removal means which is controlled via a central control.

According to the rubbing cloth removal device according to the present invention, by rotating the rubbing roller to observe the degree of deformation or contamination of the rubbing cloth wound on the rubbing roller to determine whether or not defective, the lining is generated in the rubbing cloth rubbing cloth strands sprained In this case, it is possible to prevent the defect of the liquid crystal display panel, which may be caused by the failure of the rubbing roller or the rubbing cloth, by determining the position of the rubbing cloth strand and automatically removing it.

Hereinafter, with reference to the accompanying drawings with respect to the rubbing cloth failure removal apparatus according to the present invention will be described in detail.

Figure 1a is a plan view of the rubbing cloth failure removal apparatus according to the present invention, Figure 1b is a block diagram of a rubbing cloth failure removal apparatus according to the present invention, Figure 2 is a plan view removing the backlight in Figure 1, Figure 3a is Figure 2 3B is a plan view illustrating a horizontal movement state of the image acquisition unit in FIG. 3A, and FIG. 3C is a plan view illustrating a horizontal movement state of the removal means in FIG. 3A.

As shown in FIGS. 1A to 3B, the present invention relates to a rubbing cloth defect removing device for automatically removing foreign matters from a rubbing cloth by inspecting a rubbing roller for aligning an alignment layer of a liquid crystal display panel. Rotate the rubbing roller to observe the degree of deformation or contamination of the rubbing cloth wound on the rubbing roller to determine whether it is defective, and if the rubbing cloth is stuck and rubbing cloth strands, the position of the rubbing cloth strand is determined. It relates to a rubbing cloth failure removal apparatus 100 configured to be automatically removed.

The rubbing cloth defect removing apparatus 100 is largely composed of four parts, which includes a rubbing roller 20 and an image acquisition unit 30 which acquires an image of the rubbing cloth 21 wound around the rubbing roller 20. The removal means for removing the central control unit 50 for determining whether the rubbing cloth 21 wound around the rubbing roller 20 on the basis of the acquired image, and the rubbing cloth strand 22 that the rubbing cloth 21 is squeezed out. It consists of 40.

First, the rubbing roller 20 is supported by the support 11 provided at both ends of the base 10, and is driven and rotated by the drive motor 12 mounted on the outside of the support 11.

The image acquisition unit 30 is horizontally moved by a linear motor 31 installed on one side of the base 10, and a plurality of cameras 321, 322, and 323 for capturing a stereoscopic image of the rubbing roller 20 are provided on the front side. It is a mounted configuration.

The image acquisition unit 30 of the feeding plate 32 is horizontally moved by the linear motor 31 and the rubbing cloth 21 wound around the rubbing roller 20 by photographing the center of the rubbing roller 20. The first camera 321 is installed in the horizontal direction on the front of the transfer plate 32 to measure the distance between both ends, and installed on the first camera 321 to irradiate the illumination with the rubbing roller 20. In order to three-dimensionally photograph the first light emitting means 324 and the baffle or foreign matter of the rubbing cloth 21 and the squeezing strands 22 of the rubbing cloth 21 in the horizontal direction, respectively The second camera 322 and the third camera 323 is installed.

Here, at least two first cameras 321 are installed on the horizontal line to simultaneously capture a surface of the rubbing roller 20 in a predetermined range. The first camera 321 mainly photographs the center of the rubbing roller 20, and photographs and measures the distance between both ends of the rubbing cloth 21 wound around the rubbing roller 20, and further, the rubbing cloth 21 of the rubbing cloth 21. The baffle is taken and measured.

The second camera 322 and the third camera 323 of the second camera 322 and the third camera 323 of the second camera 322 is to shoot the outer circumferential surface of the rubbing cloth 21 1 is installed at the lower end of the camera 321, the third camera 323 is installed at the lower end of the second camera 322 so as to photograph the lower portion of the rubbing cloth 21, diagonally toward the rubbing cloth 21 It is a structure installed in the direction.

Accordingly, the second and third cameras 322 and 323 may determine the position of the central controller 50 based on a three-dimensional image obtained by stereoscopically photographing the squeezing strands 22 of the rubbing cloth 21. To help.

In addition, the first light emitting means 324 is for irradiating the illumination with the rubbing roller 20 is a structure that is coaxially installed on each of the first camera 321. To this end, the first light emitting means 324 takes the shape of a “ring” body having a space formed in the middle thereof, and when the image is taken, a clearer image can be obtained.

Meanwhile, the central controller 50 calculates in real time the gaps between both ends of the rubbing cloth 21 wound on the rubbing roller 20 using the stereoscopic images captured by the image acquisition unit 30, analyzes them, and outputs them in real time. The measured values are stored in a database (not shown), and control the removal means 40 based on the measured values.

In this case, the stereoscopic images captured by the image acquisition unit 30 may be configured to be monitored by a person through the display 60.

In addition, the database of the central controller 50 inputs a driving time of the image acquisition unit 30, that is, a reference value for adjusting a shooting cycle and distinguishing a normal from a bad, and a program for contrasting the input reference value with the captured image. It is apparent that the present invention includes a program for controlling the removal means 40 to be moved back to the defective point area in the captured image.

And the removal means 40 of the base 10 so as to remove the baffle or foreign matter and rubbing strands 22 of the rubbing cloth 21 obtained through the image acquisition unit 30 It is installed to be movable horizontally on the top, is disposed on the vertical line of the rubbing roller 20 is a structure that is controlled through the central control unit 50.

The removal means 40 is provided on the second linear motor 44 installed on the top of the base 10, the movable plate 45 is horizontally moved, the lifting means installed on the upper portion of the movable plate 45 and It is composed of tongs 41 which are installed at the upper portion of the lifting means.

At this time, the tongs 41 may be driven by pneumatic or motor or hydraulic pressure, the suction hole 411 for sucking the rubbing cloth strands 22 separated from the rubbing cloth 21 in the central portion of the tongs 41. This is a more formed structure. In addition, the tongs 41 has a structure in which a rotating part 43 is further formed at the lower portion thereof so as to be rotated as the strand 22 is bent from the rubbing cloth 21.

Lifting means for elevating the tongs 41 in the above can be used a servo motor, a cylinder 42, a linear, in the present invention is a structure consisting of a cylinder.

On the other hand, the other side of the base 10 is a structure that is further provided with a second light emitting means 70 which is a backlight for irradiating illumination to the rubbing roller 20 along the longitudinal direction. When the bottom image of the rubbing cloth 21 is photographed through the second light emitting means 70, the edge of the rubbing cloth 21 is more prominent, thereby providing a structure that provides a clearer image.

4A is a side view of FIG. 1, and FIG. 4B is an operation diagram illustrating the operation of the first camera in FIG. 4A.

4A and 4, at least two first cameras 321 are installed on a horizontal line while the rubbing rollers 20 are rotated, thereby simultaneously capturing a surface of the rubbing rollers 20 in a predetermined range. Do it. The first camera 321 mainly photographs the center of the rubbing roller 20, and photographs and measures the distance between both ends of the rubbing cloth 21 wound on the rubbing roller 20, and the baffle 23 of the rubbing cloth. ) To measure.

Here, the first camera 321 is configured to determine whether there is a failure when the gap between both ends of the rubbing cloth 21 and the baffle 23 is more than the error range, by using a notification means such as an alarm (not shown). can do.

4C is an operation diagram illustrating the operation of the second camera and the third camera in FIG. 4A.

As shown in FIG. 4C, the second camera 322 is installed at the lower end of the first camera 321 to photograph the outer circumferential surface of the rubbing cloth 21 while the rubbing roller 20 is being rotated. The third camera 323 is installed at the lower end of the second camera 322 so that the lower portion of the rubbing cloth 21 can be photographed, and is installed diagonally toward the rubbing cloth 21.

Here, when the second camera 322 photographs the outer circumferential surface of the rubbing cloth 21 and the baffle 23 is generated and the corresponding part protrudes convexly and is above the error range, the second camera 322 determines whether there is a defect and whether or not it is defective by a notification means such as an alarm. Can be configured to be identified.

In addition, at the same time as the second camera 322, the third camera 323 is the position of the central control unit 50 in accordance with the two three-dimensional images obtained by stereoscopically photographing the squeezing strand 22 of the rubbing cloth 21 To judge.

That is, when the squeezing strand 22 of the rubbing cloth 21 is lying down, it is configured to be able to accurately determine the position through the third camera (323).

5A is a side view showing the position of the third camera according to the second embodiment, and FIG. 5B is a side view showing the position of the third camera according to the third embodiment.

First, as shown in FIG. 5A, the third camera 323 according to the second embodiment is embedded in the base 10 so that the lens protrudes from the upper surface of the base 10, which is a vertical line of the rubbing roller 20, and rubbing. The squeezing strand 22 of the gun 21 together with the second camera 322 is a structure capable of obtaining accurate three-dimensional imaging.

And as shown in Figure 5b, the third camera 323 according to the third embodiment is installed on the other side of the upper base 10, it may be installed diagonally toward the rubbing cloth (21).

6A is a conceptual diagram showing a first operating state of the removing means.

First, before describing the operation of the removal means 40, the removal means 40 is first compared with the central control unit 50 according to the acquired image of the second camera 322 and the third camera 323 According to the calculated position value, the removal means 40 must be moved to the corresponding position.

Thereafter, as shown in FIG. 6A, the cylinder 42 rises under the control of the central control unit 50, whereby the tongs 41 are brought close to the pimple strand 22 of the rubbing cloth 21.

The tongs 41 clamp the squeezing strand 22 of the rubbing cloth 21, and when the clamping is completed, the cylinder 42 is lowered to remove the rubbing squeezing strand 22.

The rubbing cloth squeezing strands 22 removed as described above can be completely removed by suctioning the rubbing cloth squeezing strand 22 into the suction hole 411 at the same time the clamp 41 releases the clamping.

6B is a conceptual diagram showing a second operating state of the removing means.

6B illustrates a case where the puffing strand of the rubbing cloth is laid down.

At this time, the tongs 41 are first raised by the raising of the cylinder 42, and before the clamping of the rubbing cloth strand 22 through the tongs 41, the air suction of the suction hole 411 is first generated and laid down. After the rubbing cloth strand 22 is erected, it can be removed through a series of processes such as 6a.

As described above, in the rubbing cloth defect removal apparatus according to the present invention, the removal means is limited to the forceps, but it is a matter of course that a removal means using a laser can be used.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Figure 1a is a plan view of a rubbing cloth failure removal apparatus according to the present invention,

Figure 1b is a block diagram of a rubbing cloth failure removal apparatus according to the present invention,

2 is a plan view from which the backlight is removed from FIG. 1;

Figure 3a is a plan view showing a state in which the rubbing roller is removed in Figure 2,

3B is a plan view illustrating a horizontal movement state of the image acquisition unit in FIG. 3A;

Figure 3c is a plan view showing a horizontal movement state of the removal means in Figure 3a,

4A is a side view of FIG. 1,

4B is an operation diagram showing the operation of the first camera in FIG. 4A;

FIG. 4C is an operation diagram illustrating operations of the second camera and the third camera in FIG. 4A;

5A is a side view showing the position of a third camera according to the second embodiment;

5B is a side view showing the position of the third camera according to the third embodiment;

6A is a conceptual diagram showing a first operating state of the removing means;

6B is a conceptual diagram showing a second operating state of the removing means.

<Description of the symbols for the main parts of the drawings>

10: base 11: support 12: drive motor

20: Loving roller 21: Loving cloth 22: Loving cloth squeaking strand

23: baffles

30: image acquisition unit 31: linear motor 32: transfer plate

321: first camera 322: second camera 323: third camera

324: first light emitting means

40: removal means 41: forceps 411: suction hole

42: cylinder 43: rotating portion 44: second linear motor

45: moving plate

50: central control unit

60: display

70: second light emitting means

100: rubbing cloth defect removal device

Claims (9)

In the rubbing cloth removal device for automatically removing the foreign matter of the rubbing cloth by inspecting the rubbing roller for aligning the alignment film of the liquid crystal display panel, With the base 10, A rubbing roller 20 which is supported by supporters 11 provided at both ends of the base 10 and driven by a driving motor 12 mounted on the outside of the supporter 11; The image acquisition unit 30 is horizontally moved by the linear motor 31 installed on one side of the base 10, and a plurality of cameras 321, 322, and 323 are mounted on the front side to take a stereoscopic image of the rubbing roller 20. ; Using the three-dimensional images taken by the image acquisition unit 30 calculates the eccentricity of both sides of the rubbing roller 20 and the gap between both ends of the rubbing cloth 21 wound on the rubbing roller 20 in real time and outputs the same. A central controller 50 for storing the calculated measured values in a database; Is installed horizontally on the upper end of the base 10 so as to remove the foreign matter of the rubbing cloth 21 and the squeezing strands 22 of the rubbing cloth 21 obtained through the image acquisition unit 30, And a removing means (40) disposed on a vertical line of the rubbing roller (20) and controlled by a central control unit (50). The method of claim 1, The image acquisition unit 30 is A transfer plate 32 horizontally moved by the linear motor 31, A first camera 321 installed in the horizontal direction in front of the transfer plate 32 to measure the distance between both ends of the rubbing cloth wound around the rubbing roller by photographing the center of the rubbing roller 20; First light emitting means 324 is installed on the coaxial of the first camera 321 to irradiate the illumination with the rubbing roller 20, Second camera 322 and a plurality of horizontally installed on the front of the transfer plate 32 in order to three-dimensionally photograph the baffle and foreign matter of the rubbing cloth 21 and the squeezing strands 22 of the rubbing cloth 21. Rubbing cloth failure removal device, characterized in that consisting of three cameras (323). The method of claim 2, Among the second camera 322 and the third camera 323, the second camera 322 is installed on the lower end of the first camera 321 so that the outer peripheral surface of the rubbing cloth 21 can be photographed, The third camera 323 is installed on the lower end of the second camera 322 so that the lower portion of the rubbing cloth 21, the rubbing cloth, characterized in that installed in a diagonal direction toward the rubbing cloth 21. Defect Remover. The method of claim 3, wherein The third camera (323) is a rubbing cloth removal device, characterized in that built in the base 10 so that the lens protrudes on the upper surface of the base (10) in the vertical line of the rubbing roller (20). The method of claim 3, wherein The third camera 323 is installed on the other upper side of the base 10 so that the lower portion of the rubbing cloth 21, the rubbing cloth characterized in that it is installed diagonally toward the rubbing cloth 21 Device. The method of claim 1, The removal means 40 is A moving plate 45 installed on a second linear motor 44 installed on an upper end of the base 10 to move horizontally, lifting means installed on an upper portion of the moving plate 45, and an upper portion of the lifting means. Rubbing cloth failure removal device, characterized in that consisting of tongs 41 is installed. The method of claim 6, The rubbing cloth removal device, characterized in that the suction hole (411) for sucking the rubbing cloth strands (22) separated from the rubbing cloth (21) is further formed in the central portion of the tongs (41). The method of claim 7, wherein Rubbing cloth failure removal device, characterized in that the tongs 41 is further formed with a rotating portion 43 in the lower portion to be rotated. The method of claim 1, The other side of the base 10 rubbing cloth failure elimination device is further provided with a second light emitting means 70 that can irradiate the rubbing roller 20 in the longitudinal direction.

Images