Peeling bar for peeling polarizing film from panel, peeling apparatus and peeling method using the same

a peeling bar for peeling off the polarizer from the panel, a peeling device, and Using the above peeling method

PEELING BAR FOR PEELING POLARIZING FILM FROM PANEL, PEELING APPARATUS AND PEELING METHOD USING THE SAME

The present invention relates to a technique of peeling a polarizer from a panel, and more particularly to a peeling bar, a peeling device, and a peeling method for preventing cracking of a polarizer when peeling off a polarizer attached to a panel.

Typically, a polarizer is attached to a panel of an image display device and produces polarized light that vibrates in a particular direction and displays the image. Sometimes, there may be bubbles or any other foreign matter between the panel and the polarizer. In this case, the polarizer should be peeled off from the panel by using a peeling device.

However, when the polarizer is peeled off from the panel, the irregular tension applied to the polarizer may cause the polarizer to break. This rupture requires additional manual labor, which is quite cumbersome and also increases the overall time of the peeling process. In addition, when such cracking occurs, the adhesive used for the attachment between the polarizer and the panel often causes an unclean environment.

<p>An object of the present invention is to provide a peeling bar, a peeling device, and a peeling method for stably peeling a polarizer such that a reduced frictional force is applied to the polarizer when the polarizer is peeled off from the panel, and The tension is also uniformly applied to the polarizer by preventing stress concentration at the polarizer during the stripping process.</p>

<p>In order to achieve the foregoing object, according to an embodiment of the present invention, a peeling bar for peeling a polarizer from a panel includes a body part and a front part. The body portion has a top surface and a bottom surface. The front portion protrudes from the body portion and has a lower surface, an upper surface, and a tip. The lower surface extends from the bottom surface of the body portion to form the same surface. The upper surface is inclined downward from the top surface of the body portion. The lower surface and the upper surface are connected to each other by a tip end to form a curved surface.</p><p>According to an embodiment of the present invention, in the peeling bar, the curved surface at the tip end may be a circular form having a predetermined radius.</p><p>According to an embodiment of the present invention, in the peeling bar, the radius of the curved surface at the tip may range from 4 mm to 30 mm.</p><p>According to an embodiment of the present invention, in the peeling bar, the inclined angle at the upper surface of the front portion may range from 20 degrees to 40 degrees.</p><p>According to an embodiment of the invention, in the peeling bar, the front portion can be engineered The engineering plastic is formed, or the surface of the front portion may be coated with fluorine.</p><p>According to an embodiment of the present invention, a peeling device for peeling a polarizer from a panel includes a stage, a clamper, a peeling bar, and a controller. The stage is configured to place a panel to which a polarizer is attached. The holder is configured to grip a portion of the polarizer that is peeled off from the panel. The peeling bar is configured to move over the polarizer to prevent the polarizer from excessively bending when the polarizer is peeled off from the panel. The controller is configured to move at least one of the stage and the holder to peel off the polarizer such that tension is uniformly applied to the polarizer by preventing stress concentration at a peeling position of the polarizer.</p><p>According to an embodiment of the present invention, in the peeling device, the controller may be further configured to rotate at least one of the stage, the peeling bar, and the holder, and thereby the two ends of the polarizer are closely adhered To the peeling bar, the tension is uniformly applied to the polarizer at the peeling position.</p><p>According to an embodiment of the invention, in the stripping device, the stage can be mounted to freely rotate by an external force. Therefore, the stage can be rotated by the tension applied to the peeled polarizer, and thereby, both ends of the peeled polarizer can be tightly adhered to the peeling bar, so that the tension is uniform at the peeling position Applied to the polarizer. In this case, the controller performs control for linearly moving the stage or moving the gripper without performing control for actively rotating the stage.</p><p>According to an embodiment of the present invention, in the peeling device, the controller may be further configured to move at least one of the stage and the holder, and thereby closely adhere the two ends of the peeled polarizer To the peeling bar, the tension is uniformly applied to the polarizer at the peeling position.</p><p>According to an embodiment of the present invention, the peeling device may further include an accelerator spray unit configured to spray a peeling accelerant to the peeling position. The stage may include an accelerator storage configured to prevent leakage of the stripping accelerator.</p><p>In accordance with an embodiment of the present invention, in a stripping device, the stage may include a plurality of flat-type heaters configured to uniformly apply heat to the entire surface of the stage.</p><p>According to an embodiment of the invention, in the stripping device, the height of the stripping bar may be adjustable. Furthermore, the gap between the stripping bar and the panel can be adjustable.</p><p>According to an embodiment of the present invention, in the peeling device, the holder may be configured to adjust a peeling load applied to the polarizer in the peeling process.</p><p>According to an embodiment of the present invention, a peeling method for peeling a polarizer from a panel includes a placing step, a fixing step, and a peeling step. In the placing step, the panel to which the polarizer is attached is placed on the stage. In the fixing step, after the portion of the polarizer is peeled off from the panel, the portion of the peeled polarizer is fixed to the holder, wherein the peeling bar is located at the peeling position, and the peeled polarizer and the front portion of the peeling bar Partial contact. In the peeling step, the polarizer is peeled off by moving at least one of the holder and the stage, wherein the peeled polarizer that is in contact with the front portion of the peeling bar is prevented from being excessively bent.</p><p>According to an embodiment of the present invention, in the peeling method, the peeling step may include rotating at least one of the stage, the peeling bar, and the holder, and thereby the two ends of the polarizer are closely adhered to the peeling bar, The tension is uniformly applied to the polarizer at the peeling position.</p><p>According to an embodiment of the present invention, in the peeling method, the peeling step may include allowing the stage to be rotated by the tension applied to the peeled polarizer when the stage is mounted to be freely rotated by an external force And thereby allowing both ends of the peeled polarizer to adhere tightly to the peeling bar, so that the tension is uniformly applied to the peeled polarizer at the peeling position.</p><p>According to an embodiment of the present invention, in the peeling method, the peeling step may include moving at least one of the stage and the holder, and thereby the two ends of the peeled polarizer are closely adhered to the peeling bar, The tension is uniformly applied to the polarizer at the peeling position.</p><p>According to an embodiment of the present invention, in the peeling method, the peeling step may include spraying the peeling accelerator to the peeling position.</p><p>According to an embodiment of the present invention, in the peeling method, at least one of the fixing step and the peeling step may include heat passing through a plurality of flat type heaters installed to uniformly apply heat to the entire surface of the stage Apply to the panel.</p>

<p>According to the present invention, since the polarizing plate being peeled off is in contact with the front portion of the peeling bar, the friction applied to the polarizing plate can be minimized and thus the polarizing plate can be prevented from being broken. In addition, the radius of the curved surface at the tip end of the front portion and the inclined upper surface of the front portion are designed to minimize the Z-axis component of the shearing force applied to the polarizer to prevent in the peeling process The polarizer broke.</p><p>Further, the present invention rotates at least one of the stage, the peeling bar, and the holder or at least one of the transfer stage and the holder by considering the tension applied to the polarizer in the peeling process, so that The tension can be uniformly applied to the polarizer. Therefore, the two ends of the polarizer are very close to the peeling position in the stripping procedure. The rod is peeled off so that the polarizer can be stably peeled off without cracking.</p>

<p>10 panel</p><p>20 polarizer</p><p>1000 peeling device</p><p>1100stage</p><p>1110flat assembly area</p><p>1120Accelerator storage</p><p>1130, 1130a, 1130b, 1130c, 1130d heater</p><p>1140Overheated sensor</p><p>1150Support shaft</p><p>1160temperature sensor</p><p>1170heater power supply</p><p>1200stage conveyor assembly</p><p>1210, 1220 servo motor</p><p>1230Linear motion guide</p><p>1240Servo Cam Driver</p><p>1250reducing tube</p><p>1260Support board</p><p>1300 peeling assembly</p><p>1310 peeling unit</p><p>1311Mobile components</p><p>1312Base frame</p><p>1313Joining members</p><p>1314 peeling bar/peeling member</p><p>1315Low friction cylinder</p><p>1316Rotating rod</p><p>1317 Height adjustment handle</p><p>1320Accelerator spray unit</p><p>1321Cylinder</p><p>1322Support members</p><p>1323Support rod</p><p>1324Injector</p><p>1330 peeling transfer unit</p><p>1331 Guide rail</p><p>1332Power Provider</p><p>1400Clamp assembly</p><p>1410Fixed shaft</p><p>1420Fixed rod</p><p>1430X-axis transfer unit</p><p>1440Y-axis transfer unit</p><p>1450Z-axis transfer unit</p><p>1460Clamping unit</p><p>1461Fixed components</p><p>1462Clamps</p><p>1463Connected components</p><p>1464Rotary Sensor</p><p>1465Tensure sensor</p><p>1500 controller</p><p>2000 peeling bar</p><p>2100 body part</p><p>2110 top surface</p><p>2120 bottom surface</p><p>2200 front part</p><p>2210lower surface</p><p>2220Upper surface/inclined surface</p><p>2230 tip</p><p>S110, S120, S130, S140, S150 steps</p><p>R Radius</p><p>θTilt angle</p>

1 is a plan view of an apparatus for peeling a polarizer from a panel in accordance with an embodiment of the present invention.

2 is a plan view illustrating a stage of a peeling device in accordance with an embodiment of the present invention.

3 is a perspective view illustrating a stage conveying assembly in accordance with an embodiment of the present invention.

4 is a perspective view illustrating a peeling assembly of a peeling device in accordance with an embodiment of the present invention.

5 is a perspective view illustrating a peeling unit and an accelerator spray unit of a peeling assembly in accordance with an embodiment of the present invention.

6 is a side view illustrating a peeling unit of a peeling assembly in accordance with an embodiment of the present invention.

Fig. 7 is a graph showing the results of analyzing the stress of the analysis of the peeling surface in accordance with the change in the gap between the peeling bar and the peeling surface under the condition that the peeling load was 9.81 N/mm.

Figure 8 is a perspective view illustrating a peeling bar having a front portion in accordance with an embodiment of the present invention.

9 is a side view illustrating a peeling bar having a front portion in accordance with an embodiment of the present invention.

Figure 10 shows the analytical peeling at a peeling load of 9.81 N/mm. The stress of the surface is a schematic representation of the results of changes in roll diameter.

11 is a perspective view illustrating a clamping assembly of a peeling device in accordance with an embodiment of the present invention.

Figure 12 is a perspective view illustrating a clamping unit of a clamping assembly in accordance with an embodiment of the present invention.

Figure 13 is a schematic diagram showing the results of analyzing the change in maximum stress depending on the peel load.

14(a) and (b) are schematic views illustrating the movement of a stage according to an embodiment of the present invention.

Figure 15 is a conceptual diagram illustrating a peeling method in accordance with an embodiment of the present invention.

(S1) to (S6) of Fig. 16 are conceptual views illustrating the movement of the peeling device that performs the peeling method according to the embodiment of the present invention.

17 is a schematic view illustrating a spraying action of a peeling accelerator in a peeling method according to an embodiment of the present invention.

18 is a flow chart illustrating a method for peeling a polarizer from a panel in accordance with an embodiment of the present invention.

In the following, the invention will be described with reference to the accompanying drawings. However, well-known or widely used techniques, elements, structures, and procedures may not be described or illustrated in detail to avoid obscuring the nature of the invention.

The terms and words used in the following description and claims are not to be construed as a limitation of the invention. Therefore, for having in the field It should be apparent to those skilled in the art that the following description of the various embodiments of the present invention is provided for the purpose of illustration and not limitation of the scope of the invention as defined by the appended claims.

1 is a plan view of an apparatus for peeling a polarizer from a panel according to an embodiment of the present invention, FIG. 2 is a plan view illustrating a stage of a peeling apparatus according to an embodiment of the present invention, and FIG. 3 is a view illustrating the present invention. A perspective view of the stage transport assembly of the embodiment. In addition, FIG. 4 is a perspective view illustrating a peeling assembly of a peeling device according to an embodiment of the present invention, and FIG. 5 is a perspective view illustrating a peeling unit and an accelerator spray unit of the peeling assembly according to an embodiment of the present invention, and 6 is a side view illustrating a peeling unit of a peeling assembly in accordance with an embodiment of the present invention.

As shown in FIG. 1, a peeling device 1000 for peeling a polarizer from a panel includes a stage 1100, a stage transport assembly 1200, a peeling assembly 1300, a clamping assembly 1400, and a controller 1500.

A panel to which a polarizer is attached is mounted on the stage 1100. The stage transport assembly 1200 is located below the stage 1100 and is configured to rotate or transport the stage 1100. The stripping assembly 1300 is configured to strip the polarizer from the panel, allowing for stable peeling without cracking of the polarizer. The clamping assembly 1400 is configured to grip a portion of the stripped polarizer. The controller 1500 controls the stage 1100, the stage transport assembly 1200, the stripping assembly 1300, and the clamping assembly 1400 to strip the polarizer from the panel.

Hereinafter, for the sake of understanding, it is assumed that the side-to-side (horizontal) direction and the up-and-down (vertical) direction in the plan view shown in FIG. 1 are the Y-axis direction or the lengthwise direction and the X-axis direction or the lateral direction, respectively. Widthwise direction. Now, an embodiment according to the present invention will be described in detail. Each component of the stripping device.

As shown in FIG. 2, a stage 1100 in accordance with an embodiment of the present invention includes a flat-type mounting area 1110 and an accelerator reservoir 1120 at an edge of the mounting area 1110. The panel to which the polarizer is attached is mounted on the mounting area 1110. When the polarizer is peeled off from the panel on the mounting area 1110, a peeling accelerator may be sprayed to assist in peeling. The accelerator reservoir 1120 prevents the stripping accelerator from leaking into the stripping device 1000.

Meanwhile, the assembly area 1110 may have a plurality of flat type heaters 1130. These heaters 1130 apply heat to a peeling target (i.e., a panel to which a polarizer is attached) and reduce the adhesive strength of the adhesive. In this embodiment, the fitting area 1110 is uniformly heated via the plurality of heaters 1130, and heat can be uniformly transferred to the peeling target mounted thereon. Therefore, the adhesive can also be uniformly heated, so that any polarizer due to a part of the residual adhesive can be prevented from being broken. Although the heater 1130 is formed of four flat type heaters 1130a, a flat type heater 1130b, a flat type heater 1130c, and a flat type heater 1130d in this embodiment, this case is merely illustrative and is not Recognized as a restriction.

Disposed at each of the flat type heaters 1130 is a superheat sensor 1140 for detecting excessive heat greater than a predetermined temperature, a supporting axis 1150 for supporting the flat type heater 1130, A temperature sensor 1160 for measuring the temperature of the stage 1100, and a heater power supplier 1170 for supplying power to each of the flat type heaters 1130.

The stage transport assembly 1200 is located below the stage 1100 and is configured to The stage 1100 is transported. As shown in FIG. 3, the stage transport assembly 1200 includes a servo motor 1210 and a servo motor 1220, a linear motion guide 1230, a servo cam driver 1240, and a tapering. A reducer 1250, and a supporting plate 1260. Servo motor 1210 and servo motor 1220 provide driving power for rotational or linear motion of stage transport assembly 1200. The linear motion guide 1230 directs the linear motion of the stage transport assembly 1200. The servo cam driver 1240 receives driving power from the servo motor 1210 and the servo motor 1220, and then provides rotational power for rotating the stage 1100. The reducer 1250 can be used for a reliable connection between the servo motor 1210 and the servo motor 1220 and the servo cam drive 1240. The support plate 1260 is coupled to a lower portion of the stage 1100, supports the stage 1100, and delivers rotational power of the servo cam driver 1240 to the stage 1100.

The peeling assembly 1300 is configured to peel the polarizer from the panel, thereby allowing stable peeling without cracking of the polarizer. As shown in FIGS. 4-6, the stripping assembly 1300 includes a stripping unit 1310, an accelerator spray unit 1320, and a peeling transfer unit 1330.

The peeling unit 1310 includes a moving member 1311, a base frame 1312, a joint member 1313, a peeling bar 1314, a low-frictional cylinder 1315, and a rotating bar 1316. And a height adjusting handle 1317. The moving member 1311 is an L-shaped member. In this embodiment, two moving members 1311 are used such that their inner side surfaces face each other and their lower surfaces are mounted on a guide rail 1331. Therefore, the moving member 1311 The peeling unit 1310 is allowed to move along the guide rail 1331. The base frame 1312 is installed between the inner side surfaces of the two moving members 1311. The base frame 1312 and the moving member 1311 are connected to each other and supported to each other. The joint member 1313 is formed at one side of the base frame 1312 in the longitudinal direction. The joint member 1313 connects the base frame 1312 and the peeling bar 1314. The peeling bar 1314 extends in the lateral direction and has an inclined upper surface. Both ends of the peeling bar 1314 are connected to the low friction cylinder 1315. In the case where the low friction cylinder 1315 and the joint member 1313 are used, the peeling member 1314 can be rotated to a certain extent with respect to the Z axis. A rotation sensor (not shown) for detecting the rotation of the peeling bar 1314 on the Z-axis of the joint member 1313 may be coupled to the joint member 1313. The rotating bar 1316 is formed to extend in the lateral direction and spaced apart from the peeling bar 1314, in parallel with the peeling bar 1314. Specifically, the rotating rod 1316 is closer to the base frame 1312 than the peeling bar 1314 and is also located above the peeling bar 1314. The rotating rod 1316 is rotatable about the X axis.

The height adjustment handle 1317 adjusts the height of the peeling unit 1310. When the gap between the peeling bar 1314 and the peeling position (i.e., the peeling surface) is small, the polarizer being peeled off causes less severe cracking. The reason is that a small distance from the front portion of the peeling bar 1314 to the peeling surface increases the restoring force of the curved polarizer and thus the stress. This result can be determined from the experimental results shown in Table 1 and Figure 7. Table 1 is a table showing the change in the stress of the peeling surface under the same peeling load depending on the gap between the peeling bar and the peeling surface.

<tables><img id="" he="1401" wi="1763" file="twi586602b_d0001.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

As shown in Table 1 and Figure 7, even if the peel load is constant, the small gap between the peel bar 1314 and the peeling surface can reduce the stress applied to the peeling surface and thus reduce the damage to the polarizer being peeled off. However, since the component for driving the screen protrudes from the panel, the gap between the peeling bar 1314 and the peeling surface may not be infinitely reduced. This embodiment maintains a narrow gap between the peeling bar 1314 and the peeling surface by adjusting the height of the peeling unit 1310 via the height adjusting handle 1317, and can widen the gap as necessary.

The accelerator spray unit 1320 includes a table cylinder 1321, a supporting member 1322, a supporting bar 1323, and a spray 1324. The table cylinder 1321 is coupled to each of the two moving members 1311 in the longitudinal direction. The support member 1322 is combined with the table 1321 in a form extending in the longitudinal direction. Support rod 1323 is coupled to two support members Between 1322. A plurality of injectors 1324 are disposed on the support rods 1323 and spray the stripping accelerator. In this embodiment, the stripping accelerator can be water.

The peeling transfer unit 1330 transfers the peeling unit 1310 in the longitudinal direction (Y-axis direction). To this end, the peeling transfer unit 1330 may have a guide rail 1331 and a power provider 1332. The guide rail 1331 provides guidance for transferring the peeling unit 1310 in the longitudinal direction. The power provider 1332 provides a driving force for transferring the peeling unit 1310. In this embodiment, the power provider 1332 can include a meter box, a decelerator, and a servo motor.

When the polarizer is peeled off from the panel, the peeling bar 1314 of the peeling unit 1310 guides the polarizer to be stably peeled off without cracking. To this end, the peeling bar 1314 moves over the peeling position of the polarizer, so that the polarizer may not be excessively peeled off as the peeling process progresses. The peeled polarizer is in contact with the end part of the peeling bar 1314. At this time, in order to reduce the friction between the polarizer and the peeling bar 1314, the end portion of the peeling bar 1314 takes a curved form. At the same time, the rotating rod 1316 is freely rotated, so that the peeled polarizer can be freely moved.

Now, the detailed configuration of the peeling bar having the front portion in the embodiment of the present invention will be described with reference to additional drawings. Figure 8 is a perspective view illustrating a peeling bar having a front portion in accordance with an embodiment of the present invention. Further, Fig. 9 is a side view illustrating a peeling bar having a front portion according to an embodiment of the present invention.

As shown in Figures 8 and 9, the peel bar 2000 includes a body portion 2100 and a front portion 2200. The body portion 2100 has a top surface 2110 and a bottom surface 2120. The front portion 2200 protrudes from the body portion 2100. The lower surface 2210 of the front portion 2200 extends from the bottom surface 2120 of the body portion 2100 to form the same surface. The upper surface 2220 of the front portion 2200 is from the body portion 2100 The top surface 2110 is inclined downward. The tip end 2230 of the front portion 2200 joins the lower surface 2210 and the upper surface 2220 to form a curved surface. In this embodiment, the curved surface of the tip end 2230 of the front portion 2200 can be in the form of a circle having a predetermined radius (R). Therefore, in the peeling process, the polarizer being peeled remains in contact with the tip end 2230 of the front portion 2200 having the curved surface, so that the frictional force applied to the peeled polarizer can be reduced and thus the polarizer is prevented from being broken.

When the polarizer is peeled off from the panel, in the front portion 2200 in direct contact with the polarizer, the radius (R) of the curved surface at the tip end 2230 and the inclination angle (θ) of the upper surface 2220 have an influence on the crack of the polarizer. The reason is that the polarizer being peeled off moves while remaining in contact with the tip end 2230 of the front portion 2200 and the upper surface 2220. In this embodiment, the rupture of the polarizer is minimized by adjusting the radius (R) of the curved surface at the tip 2230 and the tilt angle (θ) of the upper surface 2220 in the front portion 2200. To this end, the radius (R) of the curved surface at the tip 2230 is formed to range from 4 mm to 30 mm, preferably 5 mm. Further, the inclination angle (θ) of the upper surface 2220 is formed to be in the range of 20 to 40 degrees, preferably 30 degrees. When the front portion 2200 is formed to have the radius (R) of the curved surface at the tip 2230 and the inclination angle (θ) of the upper surface 2220, the crack of the polarizer is minimized in the peeling process.

<tables><img id="" he="1486" wi="1731" file="twi586602b_d0002.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

Table 2 is a table showing changes in the stress of the peeling surface depending on the change in the diameter of the tip end portion. As shown in Table 2 and Figure 10, the tip diameter of the front portion reduces the stress occurring at the peeling surface when the peel load is constant, so that the crack of the polarizer can be minimized in the stripping procedure . The reason for the smaller tip diameter of the front portion to reduce the stress occurring at the peeling surface is that the smaller tip diameter of the front portion promotes deformation of the polarizer even under constant load and thus allows the polarizer to be easily peeled off. The ground is curved; and the smaller tip diameter of the front portion reduces the distance between the tip end of the front portion and the peeling surface, increasing the restoring force of the curved polarizer, and thus causing stress reduction. Thus, as the tip diameter (or radius) of the front portion is reduced, the polarizer can be prevented from being broken during the peeling process. However, the tip portion has a too small tip diameter (such as a peel at 16.35 Newtons/mm) A 5 mm tip diameter under load can cause any damage at the tip of the front portion. Therefore, the tip diameter of the front portion should be reduced within the limit without causing damage at the tip end of the front portion. In this embodiment, it is necessary to make the tip end portion have a diameter of 10 mm (i.e., a radius of 5 mm).

In this embodiment, the body portion 2100 can be formed of a metallic material to maintain rigidity. The front portion 2200 can be formed of an engineering plastic to prevent cracking of the peeled film and also to reduce sliding friction. In another embodiment, the surface of the front portion 2200 can be coated with fluorine to reduce friction.

In another embodiment, a low-frictional pad can be attached to the inclined surface 2220 of the front portion 2200. The low friction pad attached to the inclined surface 2220 is in contact with the polarizer being peeled off. The low friction pad is formed of a material having a low coefficient of friction in order to reduce the friction applied to the polarizer and thus prevent the polarizer from breaking in the peeling process.

Figure 11 is a perspective view illustrating a clamping assembly of a peeling device in accordance with an embodiment of the present invention. Figure 12 is a perspective view illustrating a clamping unit of a clamping assembly in accordance with an embodiment of the present invention. Figure 13 is a schematic diagram showing the results of analyzing the change in maximum stress depending on the peel load. Figure 14 is a schematic diagram illustrating the movement of a stage in accordance with an embodiment of the present invention.

As shown in Figures 11-14, the clamping assembly 1400 includes a fixing axis 1410, a fixing bar 1420, an X-axis transfer unit 1430, and a Y-axis transfer unit (Y). -axis transfer unit 1440, Z-axis transfer unit 1450 and clamping unit 1460.

The fixing rod 1420 extends in the Y-axis direction. The fixed shaft 1410 supports the fixing rod 1420 such that the fixing rod 1420 is fixed at a predetermined height at both ends thereof.

The clamping unit 1460 is mounted on the X-axis transfer unit 1430, and the X-axis transfer unit 1430 is mounted on the Z-axis transfer unit 1450. Further, the Z-axis transfer unit 1450 is mounted on the Y-axis transfer unit 1440, and the Y-axis transfer unit 1440 is mounted on the fixed bar 1420. The Y-axis transfer unit 1440 transfers the Z-axis transfer unit 1450 in the Y-axis direction, the Z-axis transfer unit 1450 transfers the X-axis transfer unit 1430 in the Z-axis direction, and the X-axis transfer unit 1430 transfers the clamp unit 1460 in the X-axis direction. . Therefore, the X-axis transfer unit 1430, the Y-axis transfer unit 1440, and the Z-axis transfer unit 1450 can transfer the clamping unit 1460 in the X-axis direction, the Y-axis direction, and the Z-axis direction as needed.

The clamping unit 1460 has a fixing member 1461, a holder 1462, an engagement member 1463, a rotation sensor 1464, and a tension sensor 1465. The clamping unit 1460 is fixed to the X-axis transfer unit 1430 via the fixing member 1461. The holder 1462 holds a portion of the peeled polarizer. To this end, the holder 1462 can have a support member and a cylinder. The gripper 1462 can adjust the peeling load applied to the polarizer by adjusting the pressure applied to the cylinder. Table 3 is a table showing the change in maximum stress depending on the peel load. As shown in Table 3 and FIG. 13, when the peeling load is increased, the curvature of the polarizer is reduced at the peeling surface. Therefore, the stress is reduced and the peeling performance is improved. However, if the peeling load exceeds a critical value, maximum stress can be generated at the tip end of the front portion and thereby increase the likelihood that the tip of the front portion will be damaged. Therefore, in order to effectively peel off, it is necessary to increase the peeling load without damaging the tip end portion.

<tables><img id="" he="1340" wi="1367" file="twi586602b_d0003.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

The engaging member 1463 allows the gripper 1462 to rotate in a certain range on the Z-axis using a rotating force output from a servo motor or the like. Although the gripper 1462 is described as rotating on the Z-axis in this embodiment, it is also possible to have any other rotation on the other shaft or shafts.

The rotation sensor 1464 detects the rotation angle of the holder 1462. In this embodiment, the rotation sensor 1464 can be, but is not limited to, a rotary encoder or a potentiometer. The tension sensor 1465 can detect the tension applied to the polarizer. The tension sensor 1465 can be a load cell.

When any tension occurs at the polarizer being peeled off, the gripper 1462 rotates in a certain direction by means of the tension. At this time, information on the tension detected by the rotation sensor 1464 and the tension sensor 1465 and the rotation angle is supplied to the controller 1500. Therefore, the controller 1500 can recognize the tension and the total rotation of the gripper 1462. The corners, and thereby the rotation of at least one of the stage 1100, the holder 1462, and the peeling bar 1314 are controlled to maintain the uniform tension of the polarizer being peeled off. That is, by controlling at least one of the stage 1100, the holder 1462, and the peeling bar 1314, stress concentration does not occur and thus tension can be uniformly applied to the entire polarizer. For this reason, it is possible to allow both ends of the polarizer being peeled off to be very close to the peeling bar. In order to minimize cracking of the polarizer in the stripping process, it is necessary to make both ends of the polarizer very close to the peeling bar at the peeling position. That is, if either end of the polarizer becomes slack or moves when the peeling process is performed, the possibility of cracking increases. In this embodiment, by controlling at least one of the stage 1100, the holder 1462, and the peeling bar 1314 to rotate, the two ends of the polarizer being peeled off can be very close to the peeling bar 1314, and The polarizer can be prevented from cracking during the stripping process.

In an embodiment, stage 1100 has various motions. As shown in (a) of FIG. 14, the stage 1100 is linearly movable in the X-axis direction and the Y-axis direction under the control of the stage transport assembly 1200. In an embodiment, the peeling procedure for peeling the polarizer from the panel may be performed via movement of the stage 1100. In addition, the movement of the stage 1100 allows the two ends of the polarizer being peeled off to be very close to the peeling bar 1314.

As shown in (b) of FIG. 14, the stage 1100 is rotatable and linearly movable. Such rotation of the stage 1100 can be performed in two types. In an embodiment, the controller 1500 can actively rotate the stage 1100 by controlling the stage transport assembly 1200. That is, the stage 1100 is attached to the stage transport assembly 1200 via the drive shaft and is rotated by the rotation of the drive shaft. This situation makes it possible to actively control the rotation of the stage 1100 in the stripping procedure so that it can be controlled by the polarizer The tension is adjusted at the two lateral ends. It is therefore possible to make the two lateral ends of the polarizer very close to the peeling bar at the peeling position.

In another embodiment, the stage 1100 is assembled to the stage transport assembly 1200 for free rotation. That is, when any external force is applied to the stage 1100, the stage 1100 is free to rotate. In this case, the external force (i.e., tension) applied to the polarizer is transmitted to the stage 1100, and the free rotation of the stage 1100 allows the tension to be uniformly applied to the entire polarizer. Therefore, the polarizer can be prevented from being broken in the peeling process.

Now, a peeling method according to an embodiment of the present invention will be described. Figure 15 is a conceptual diagram illustrating a peeling method in accordance with an embodiment of the present invention. FIG. 16 is a conceptual diagram illustrating the movement of a peeling device that performs a peeling method according to an embodiment of the present invention. 17 is a schematic view illustrating an ejection action of a peeling accelerator in a peeling method according to an embodiment of the present invention. 18 is a flow chart illustrating a method for peeling a polarizer from a panel in accordance with an embodiment of the present invention.

As shown in FIGS. 15 to 18, according to an embodiment of the peeling method of peeling the polarizer from the panel, the panel 10 to which the polarizer 20 is attached is placed on the stage 1100 (step S110). After the panel 10 is placed on the stage 1100, the stage 1100 is moved to a clamping position. In another embodiment, the holder 1462 can be moved in place of the stage 1100. In yet another embodiment, both stage 1100 and holder 1462 can be moved together.

When the stage 1100 is moved to the nip position, the portion attached to the polarizer 20 of the panel 10 is peeled off and fixed to the holder 1462 of the nip unit (step S120). In order to peel off portions of the polarizer 20, the panel 10 may be heated. At this time, since the stage 1100 can uniformly deliver heat to the entire surface via a plurality of flat type heaters The plate 10 is so that no cracking occurs at the polarizer 20 in the peeling process. In addition, as shown in FIG. 15, when the portion of the peeled polarizer 20 is fixed to the holder 1462, the peeled polarizer 20 remains in contact with the front portion of the peeling bar 1314. That is, the peeled polarizer 20 is fixed to the holder 1462 so as to remain in contact with the front portion of the peeling bar 1314 and the rotating bar 1316. It is therefore possible to prevent the peeled polarizer 20 from being excessively bent and thus preventing the polarizer from being broken in the peeling process.

When the portion of the polarizer 20 is fixed to the holder 1462, a peeling process for the polarizer 20 is performed (step S130). This procedure is accompanied by movement of at least one of the stage 1100 and the holder 1462. In order to peel off the polarizer 20, the panel 10 can be uniformly heated via a plurality of flat type heaters, and thus the polarizer 20 is prevented from being broken during the peeling process. In addition, the cylinder of the holder 1462 can adjust the peeling load applied to the polarizer 20 in the peeling process by adjusting the pressure applied to the cylinder.

When the polarizer 20 is peeled off, at least one of the stage 1100 and the holder 1462 can be moved such that both ends of the polarizer 20 can be very close to the peeling bar 1314 and also allow a uniform force to be applied to the strip. Polarizer 20. That is, one or both of the stage 1100 and the holder 1462 can be moved. Therefore, both ends of the polarizer 20 are closely adhered to the peeling bar 1314, so that the polarizer 20 can be stably peeled off without cracking.

Further, in this embodiment, at least one of the stage 1100, the peeling bar 1314, and the holder 1462 may be rotated in the peeling process so that the peeled polarizer 20 may have a uniform force in the lateral direction. The controller may detect the tension applied to the polarizer and the rotation angle via a tension sensor of the clamping unit and a rotation sensor, a rotation sensor coupled to the engagement member of the peeling unit, and the like. Based on such a sensing value, the controller can rotate the stage 1100 and the peeling bar 1314 And at least one of the grippers 1462 to obtain a uniform force.

In another embodiment, the stage 1100 can be mounted to freely rotate by any external force such that the stage 1100 can be rotated by the tension applied to the stripped polarizer 20. In this case, the stage 1100 can be rotated in any direction for equalizing the tension applied to the polarizer 20 in the lateral direction without any control of the controller. That is, if the tension applied laterally to the polarizer 20 is not uniform, the stage 1100 can freely rotate in the direction for the uniform force.

In this embodiment, as shown in Figure 17, the stripping accelerator can be sprayed to the stripping position during the stripping procedure. The stripping accelerator can be water and the sprayed stripping accelerator removes the adhesive significantly. The stripping accelerator can be injected via the ejector.

When the polarizer 20 is completely peeled off, the peeled polarizer 20 is discharged (step S140). Next, the controller moves the stage 1100 to a position for unloading the panel 10.

When the stage 1100 is moved to a given position, the panel 10 is unloaded from the stage 1100 (step S150). Thereafter, in order to peel off the other polarizer from the other panel, the stage 1100 is moved to a position for placing the panel.

The method for peeling a polarizer from a panel by a controller according to the present invention may be implemented in a software form that is read by various calculation methods and recorded in a computer-readable storage medium. The storage medium may contain a program command, a data file, a data structure, and the like, alone or in combination. The program commands recorded in the storage medium may be specifically designed for the present invention or are well known to those skilled in the computer software industry. For example, the storage medium may include: a magnetic medium (such as a hard disk, a floppy disk). And magnetic tape; optical media, such as Compact Disc Read Only Memory (CD-ROM) and Digital Versatile Disc (DVD); magnetic-optical media (magneto- Opticalmedium), such as a floptical disk; and specially configured to store and execute program instructions (program A hardware device such as a read only memory (ROM), a random access memory (RAM), a flash memory, and the like. . Such program instructions may include a high class language code that can be executed on a computer by using an interpreter, and a machine code by a compiler. The aforementioned hardware devices can be configured to operate as one or more software modules to perform the operations of the various embodiments of the present disclosure, and vice versa.

While the present invention has been particularly shown and described with respect to the embodiments of the present invention, it will be understood by those skilled in the art, without departing from the spirit and scope of the invention as defined by the appended claims Various forms and details of the changes may be made in the illustrative embodiments.

[Industrial Applicability]

The present invention relates to a peeling bar, apparatus and method for stripping a polarizer from a panel. Since the peeled polarizer is in contact with the curved front portion of the peeling bar, the present invention can minimize the friction between the peeling bar and the polarizer. Therefore, it is possible to prevent the polarizer from being broken when the polarizer is removed.

The present invention can be used to manufacture a panel of an image display apparatus, and can also stably peel the polarizer from the panel without being polarized by a non-uniform force applied to the polarizer. The piece broke.