KR20120067106A - Apparatus and method for cutting film capable of adapting to meandering of film - Google Patents

Abstract

PURPOSE: An apparatus and a method for cutting meandering adaptive films are provided to maintain width of a constant cutting line in spite of meandering of films by cutting while a cutter for cutting a cutting part is moved according to extent of meandering. CONSTITUTION: An apparatus for cutting meandering adaptive films comprises an unwinding unit, a meandering recognition unit(120), a cutting unit(130), a moving unit(140), and winding units(150). A film is wound on the unwinding unit. The meandering recognition unit recognizes the area of a cutting part of the film capable of driving by unwinding from the unwinding unit. The cutting unit cuts the cutting part and is movably installed to a lateral direction of the cutting part. The moving unit moves the cutting unit to an actual center of the lateral direction of the cutting part according to meandering extent of the film recognized by the meandering recognition unit. The winding units respectively wind two or more films cut by the cutting unit.

Description

Apparatus and method for cutting film capable of adapting to meandering of film}

The present invention relates to a meandering adaptive film cutting device and method, and more particularly, meandering which can be divided in half based on a cutting part regardless of whether or not a patterned retarder film can be used for a stereoscopic image display device or the like. An adaptive film cutting device and method.

In general, stereoscopic image display devices are spectacle type such as shutter glasses, micro polarizer, patterned retarder, glasses type 3D display, parallax barrier, lenticular lens, etc. 3D display, and holographic 3D display.

On the other hand, the patterned retarder is divided into glass-type and film-type according to the type of substrate. However, since glass-type patterned lather is difficult to meet the trend of large-sized display, a patterned retarder film using an organic polymer film as a substrate has become popular in recent years.

In the production line of the patterned retarder film, it is industrially used to utilize individual film fabrics corresponding to the widths of the individual models so as to correspond to the respective displays such as 42 inches, 47 inches, 55 inches, and the like. Not useful Because, in general, the width of the film fabric is predetermined, for example, approximately 1400 mm, cutting and patterning the film fabric by the width of the individual model not only increases the process unnecessarily but also reduces the utilization of the film. have. Therefore, by forming a plurality of patterned retards suitable for individual models in the longitudinal direction of the film having a constant width, and cutting the respective patterning along the cut portion, it is possible to prevent unnecessary waste of the film. .

By the way, even if the patterned retarder film having a predetermined patterning is maintained even in the pattern forming process, the profile of the pattern itself formed on the film may be formed differently based on both sides in the width direction of the film. The film may meander by stretching or contracting the patterned retarder film in the process of unwinding the retarder film from the unwinder and traveling. In addition, the size of the pattern formed in the patterned retarder corresponds to the pixel or pixel unit width and is very precise. Usually, the shape of the pattern is formed in accordance with the row or column of the LCD and the position of the row or column of the LCD pixel when mounting it on the LCD. As described above, the patterned retarder is cut when the film is meandered in the process of cutting the patterned retard film to separate the respective patterning areas because there is a necessity to align and attach it exactly. There is a problem that can not satisfy the alignment.

The present invention has been conceived to solve the above problems, and even if the film meanders in the process of cutting a predetermined film formed by a plurality of pattern regions separated by a thin and long cut in the longitudinal direction, accurately grasp the degree of meandering. It is a technical object of the present invention to provide a meander adaptive film cutting device and method having an improved structure so that a cutter can be cut and moved according to the degree (direction and spacing) of meandering.

In order to solve the above problems, the meandering adaptive film cutting device according to an exemplary embodiment of the present invention, by adapting to the meandering of the film partitioned by the cutting portion formed at least two or more pattern regions in the longitudinal direction A meandering-adadptive film cutting device capable of dividing the cut portion, comprising: an unwinding unit on which the film is wound; A meandering recognition unit installed to be spaced apart from the cut portion to recognize an area of the cut portion of the film that is unwound from the unwinding unit; A cutting unit capable of cutting the cut portion and installed to be movable in a width direction of the cut portion; A moving unit capable of finely moving the cutting unit to a substantially center in the width direction of the cutting part according to the degree of meandering of the film recognized by the meandering recognition unit; And at least two or more winding units for respectively winding at least two or more cut films cut by the cutting unit.

The meandering adaptive film cutting device according to an exemplary embodiment of the present invention unwinds a film having two pattern regions formed on both sides of a cut portion provided in a longitudinal direction of a film having a predetermined width from an unwinding unit, and unwinds the film. When the film meanders in the process, the meandering degree (direction and spacing) is extracted through the meander recognition unit provided at the upper part or the lower part of the cutout, the extracted information is transmitted through the control part, and the control part operates the mobile unit to operate the upper part of the film. Or it is for cutting while finely moving the cutting unit disposed to be spaced apart from the cutting portion at the bottom.

Preferably, the meandering recognition unit is a camera such as, for example, a CCD camera provided to photograph the cut portion of the film. It will be understood by those skilled in the art that the meandering recognition unit may be replaced by other recognition means for recognizing the meandering degree of the cut portion, for example, by contact or non-contact, in addition to the CCD camera.

Preferably, the CCD camera may photograph an area larger than the maximum meandering distance of the film at an appropriate resolution around the cut portion. In addition, it will be apparent to those skilled in the art that the controller of the apparatus can determine the meandering distance of the film taken by the camera as well as the direction of the meandering as well as the difference in the distance between the edges of the cutout in the meandering state from the center of the cutout.

Preferably, the cutting unit is spaced apart from the meandering unit at a predetermined interval, the cutting unit is provided with a laser cutter capable of irradiating a laser beam to the cutting unit.

Preferably, the laser cutter comprises: a laser source; A laser nozzle positioned above or below the cut portion; And a beam guide member for guiding a laser beam from the laser source to the laser nozzle.

Preferably, the laser cutter is equipped with laser equipment such as, for example, a CO ₂ laser, a YAG laser, a UV laser, etc., and is highly applicable to a thickness range, and uses a CO ₂ laser to prevent cracks and marking defects from occurring. It is desirable to. In laser irradiation by a laser cutter, the output and the speed are not limited, and may be cut by a single irradiation of a laser, or cutting may be completed by a plurality of laser irradiations. Therefore, it is desirable to adjust the output of the laser in accordance with the number of irradiation of the laser, it is apparent to those skilled in the art that the irradiation time of the laser, the energy per unit length, the diameter, the speed of the laser beam, and the like can be determined in an appropriate range.

On the other hand, the cutting unit may be used in addition to the above-described laser cutter, mechanical equipment such as a cutting blade.

Preferably, the moving unit includes a servo mechanism capable of finely moving the cutting unit according to the degree of meandering recognized by the meandering recognition unit by a predetermined interval in a width direction of the film orthogonal to the traveling direction of the film. do.

Such servomechanisms include, for example, electric servomechanisms such as DC servomotors, synchronous AC servomotors, inductive AC servomotors, stepping motors, ultrasonic motors, or the like, or hydraulic servomechanisms using hydraulic motors, or servo valves. It may be an electro-hydraulic servo mechanism using a hydraulic motor. However, the servomechanism produces a fluid output proportional to the electrical input, and has a high output, high density, high accuracy, and very fast response electro-hydraulic servo valve (e.g., nozzle-flapper type, DDV). (Direct Drive Servo Valve) and hydraulic motor are recommended.

The servo mechanism includes, for example, a motion controller capable of cutting the position change amount of time of the cut portion of the film into a voltage change amount of time and cutting while following the position of the laser nozzle of the cutting unit by PID and a high intensity following motion command. It is preferable to interlock.

Preferably, the servo mechanism is provided between the meandering recognition unit and the cutting unit, and the cutting unit is provided to be relatively movable with respect to the meandering recognition unit. That is, in a preferred exemplary embodiment of the present invention, the meandering recognition unit such as a camera is fixed in position with respect to the device, and the cutting unit is a servo mechanism of the moving unit such that the cutting unit is movable relative to the fixed meandering recognition unit. And between the meander recognition unit.

Preferably, the meandering recognition unit, the cutting unit, and the mobile unit all constitute one module. To this end, in a preferred exemplary embodiment of the present invention, the meandering recognition unit, the cutting unit, and the moving unit are installed in a module plate, which module plate is perpendicular to the advancing direction of the film before the cutting process of the film. It is moved in advance in the width direction of the film and its position is fixed. In this state, as described above, in the state where the meander recognition unit is fixed on one module plate, the position of the cutting unit is set to be moved according to the degree of meandering of the film by the moving unit.

The above-described embodiments relate to an apparatus for cutting a film having one cutting line in the longitudinal direction of the film and having two pattern regions on both sides in the longitudinal direction of the cutting line. This is for example the case of pattern regions with a width of approximately 700 mm on both sides of the film having a width of 1400 mm, for example, a patterned retarder with two pattern regions that can be applied to, for example, a 55 inch display device. The film can be cut.

However, for example, since the width of the pattern area of the patterned retarder applied to the 32-inch display device is approximately 400 mm, in this case, three pattern areas may be formed in the film fabric of approximately 1400 mm. Therefore, in the case of providing three pattern regions of the 32-inch patterned retard, two cutting lines are required, and thus the module described above needs to be expanded. Details will be described later.

Preferably, the cut portion includes at least two cut lines each formed in the longitudinal direction of the film; The module is divided into at least two main cutting modules each arranged to correspond to each of the cutting lines. This embodiment is a case where there are a plurality of the above-described module plate, for example, there may be two main cutting module, each cutting module is provided with each of the cutting plate described above. Here, it will be apparent to those skilled in the art that if the width of the film fabric is wider or there is a change in the size of the display, the size of each pattern region formed in the film fabric can be determined accordingly and the number of cutting lines can be adjusted accordingly. .

Preferably, each said main cutting module is movable in the width direction of the said film. This is to move and fix the positions of the main cutting modules in advance corresponding to the positions of the cutting lines formed on the unwound film.

The above embodiments are examples of cutting a film in which one cutting line or two cutting lines are formed in the length direction of the film. However, for example, both edges of the film fabric for producing a film for a special use in which a predetermined pattern region (s) are formed, such as a patterned retarder, may have various curved shapes that are not normally straight. As can be seen, for films having a special purpose that will be compatible with other equipment of the display device, it is usually necessary to cut the side portions of the film in order to increase the precision of such edge portions.

To this end, the cut portion further comprises a pair of side cut lines respectively formed at both longitudinal edges of the film; The module further includes a pair of side cutting modules that can be respectively disposed to correspond to each of the side cutting lines.

Preferably, each said side cutting unit is movable in the width direction of the said film. This is also for moving and fixing the position of the side cutting modules in advance corresponding to each position of the side cutting lines formed in the film to be unwound.

Preferably, the apparatus further includes a tension adjusting unit for adjusting the tension of the film from the unwinding unit to the meandering unit.

Preferably, the tension control unit has a plurality of dancing rollers on which the film can be wound.

Preferably, the film comprises a patterned retarder film for a stereoscopic image display device; Each of the pattern regions includes a pattern of the patterned retarder.

In an alternative embodiment, the film may comprise an optical film comprising, for example, a polarizing film or the like, or any form of overlapping film formed by bonding to the optical film, separated by a cut in the longitudinal direction and It will be apparent to those skilled in the art to include any films known or heretofore known that have a structure in which a pattern area of a predetermined form is formed on a fabric.

Preferably, the width of the cut is approximately 0.8 to 1.0 mm and the width of the cut to be cut by the cutting unit is approximately 0.2 mm. The width of this cut and the width of the cut cut by the cutting unit can be adjusted by the person skilled in the art.

Preferably, the spacing between the cutout and the pattern region is approximately 5-10 mm. It is apparent to those skilled in the art that the distance between the cutout and the pattern area corresponds to, for example, an area disposed at the edge of the image display part of the display device, so that it can be appropriately adjusted according to the specification of the display.

An adaptive film cutting device according to a preferred exemplary embodiment of the present invention further comprises a collecting unit for collecting the debris of the film cut by the cutting unit. The collection unit is for collecting foreign matter such as combustion gas, debris generated from the film, and the like generated during the projection and cutting process of the laser through the laser nozzle of the laser cutter of the cutting unit, as described above.

Preferably, the collection unit comprises a tray disposed opposite the cutting unit with the film therebetween; A discharge pipe communicating with the tray; And a suction pump installed in communication with the discharge pipe.

Preferably, the collection unit is movable in the width direction of the film.

In a meandering adaptive film cutting method according to a preferred exemplary embodiment of the present invention, (a) unwinding the film, which is partitioned by a cut formed with at least two or more pattern regions in a longitudinal direction, from an unwinding unit ; (b) recognizing a region of the cut portion of the film that is traveling through a meandering recognition unit spaced apart from the cut portion; (c) cutting the cut-off portion by half while finely adjusting and controlling the cutting unit for cutting the cut-out portion to correspond to the position of the cut-off portion recognized by step (b); And (d) separating and winding the cut at least two or more cut films into at least two or more winding units.

Preferably, the step (b) includes the step of photographing the cut region of the film using a camera.

Preferably, the step (c) includes a step of operating a laser cutter which is spaced apart from the meander recognition unit at a predetermined interval, and which can irradiate a laser beam to the cut portion.

Preferably, the laser cutter comprises: a laser source; A laser nozzle positioned above the cut portion; And a beam guide member for guiding a laser beam from the laser source to the laser nozzle.

Preferably, the step (c) includes operating a servo mechanism capable of moving the cutting unit at a predetermined interval in a direction orthogonal to the running direction of the film.

Preferably, the servo mechanism is a hydraulic servo mechanism provided between the meandering recognition unit and the cutting unit and provided so that the cutting unit can move relative to the meandering recognition unit.

Preferably, the cut portion includes at least two cut lines each formed in the longitudinal direction of the film; The steps (b) and (c) comprise operating at least two meandering recognition units and cutting units, each arranged to correspond to each of the cutting lines.

Preferably, each of the meandering recognition units and the cutting units are moved and fixed in advance before the step (a) to correspond to the cutting lines.

Preferably, the cut portion further comprises a pair of side cut lines respectively formed at both longitudinal edges of the film; The steps (b) and (c) further comprise actuating a pair of meandering recognition units and cutting units respectively arranged to correspond to the respective side cutting lines.

Preferably, the method may further include arranging and fixing the pair of meandering recognition units and the cutting units to correspond to the respective side cutting lines before the step (a).

Preferably, the width of the cutout is approximately 0.8 to 1.0 mm.

Preferably, in step (c), the width of the cut portion cut by the cutting unit is approximately 0.2 mm.

Preferably, the spacing between the cutout and the pattern region is approximately 5-10 mm.

Preferably, in the step (c), further comprising the step of collecting the debris of the film cut by the cutting unit using a collection unit.

Preferably, the collecting step comprises the steps of: collecting the debris to the tray of the collection unit; And discharging using a suction pump through a discharge pipe disposed in communication with the tray.

Preferably, the film is a patterned retarder film.

According to the present invention, there is provided a stereoscopic image display device including a patterned retarder film manufactured by the method of the above-described embodiments.

The meandering adaptive film cutting device and method according to the present invention, even if the film meanders in the process of cutting a predetermined film (e.g., a patterned retarder film) formed by a plurality of pattern regions are formed by the elongated cut in the longitudinal direction, By accurately grasping the degree of meandering and cutting the position of the cutter for cutting the cutting part according to the degree of meandering (direction and spacing), the film can always maintain a constant cutting line width even if the film meanders.

The foregoing summary of the invention as well as the following detailed description of the preferred embodiments of the invention will be better understood when read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS For the purpose of describing a meandering adaptive film cutting apparatus and method according to a preferred exemplary embodiment of the present application, drawings of preferred embodiments are shown. It should be understood, however, that the present application is not limited to the precise arrangements and instrumentalities shown in such drawings.
1 is a conceptual diagram schematically showing a meandering adaptive film cutting device according to a first exemplary embodiment of the present invention.
Fig. 2 is a perspective view schematically showing the configuration of the meander adaptive film cutting device according to the first exemplary embodiment of the present invention.
FIG. 3 is a conceptual diagram illustrating the meandering degree around the cut portion of the film shown in FIG. 2 and a meander recognition unit portion for photographing the cut portion. FIG.
4 is an enlarged view of a portion “A” of FIG. 2.
Fig. 5 is a plan view schematically showing the configuration of a meandering adaptive film cutting device according to a second exemplary embodiment of the present invention.
6 is a right side view of FIG. 5.
7 is a front view of FIG. 5.
FIG. 8 is an enlarged partial cross-sectional view of a meandering recognition unit, a cutting unit, and a moving unit shown in FIG. 6.
9 is a perspective view schematically showing a state in which three pattern regions are partitioned by two cutting lines, and a film having two side cutting lines formed at both edges thereof is wound on an unwinding roller.
10 is a cross-sectional view of the film of FIG. 9.
11 is a cross-sectional view illustrating a process of cutting a central portion of a cut portion of a film by a laser beam irradiated through a laser nozzle.
12 is a cross-sectional view of the patterned retarder cut by FIG. 11.
FIG. 13 is a plan view of FIG. 12.

The specific terminology used in the detailed description that follows is for the purpose of convenience and not of limitation. The words "right", "left", "top" and "bottom" indicate directions in the figures to which reference is made. The words "inwardly" and "outwardly " refer to directions toward or away from the geometric center of a designated apparatus, system, and members thereof, respectively. "Forward", "backward", "upward", "downward" and their related words and phrases are indicative of the positions and orientations in the figures to which reference is made and are not limiting. These terms include the words listed above, derivatives thereof, and words of similar meaning.

Certain exemplary embodiments of the present invention will be described with reference to the drawings.

1 is a conceptual diagram schematically showing a meandering adaptive film cutting apparatus according to a first exemplary embodiment of the present invention, Figure 2 is a configuration of a meandering adaptive film cutting apparatus according to a first exemplary embodiment of the present invention 3 is a perspective view schematically illustrating a meandering degree around a cut portion of the film shown in FIG. 2 and a meander recognition unit portion for photographing the cut portion.

1 to 3, the meander adaptive film cutting device 100 according to the present exemplary embodiment may include, for example, one formed with two pattern regions PA that may be applied to a 55-inch display device in a longitudinal direction. Even if the patterned retarder film F partitioned by the cutting section FC, such as the cutting line L, is meandered while traveling for cutting, it is a system capable of half-cutting the cutting section FC by adapting to such a meandering.

The meandering adaptive film cutting device 100 according to the present exemplary embodiment includes an unwinding unit 110 in which the film F may be wound and unwound, and an unwinding unit 110 of the unwinding unit 110. It is possible to cut the meander recognition unit 120 and the cut section FC installed at the upper portion of the cut section FC to be spaced apart from the cut section FC so as to recognize the area of the cut section FC, and in the width direction of the cut section FC. According to the degree of meandering of the film F recognized by the cutting unit 130 and the meandering recognition unit 120 installed to be moved in a manner, the cutting unit 130 may be finely moved to a substantially center of the width direction of the cutting part FC. Movable unit 140, and two rewinding units 150 for winding each of the two cut films CF cut by the cutting unit 130.

The meandering adaptive film cutting device 100 according to the present embodiment has a width of about 700 mm on both sides of the cut part FC provided in a width of about 1.0 mm in the longitudinal direction of the film F having a width of 1400 mm, for example. The film F on which the two pattern regions PA having the width are formed is unwound from the unwinding unit 110, and the cut part FC is meandered by the meandering of the film F during the unwinding process. Through the meander recognition unit 120 provided above the FC) the degree of meandering (eg, direction and spacing) of the film F is extracted in the form of 'position change with respect to time' and sent to a controller (not shown), The controller converts the time unit voltage change amount based on the extracted information to operate the mobile unit 140 in the form of a PID command to operate the cutting unit 130 spaced apart from the cutting unit FC on the upper portion of the film F. It is for cutting while moving finely.

The unwinding unit 110 includes an unwinding roller 112 (see FIG. 1) in which the film F to be cut is wound and rotated. Between the unwinding unit 110 and the meandering unit 120, the tension adjusting unit 160 and the film F including a plurality of dancing rollers 162 for adjusting the tension of the film F traveling. A plurality of idle rollers 170 are provided to guide the driving.

The meandering recognition unit 120 is a camera 122 such as, for example, a CCD camera, provided to photograph the cut portion FC of the film F. As shown in FIG. The CCD camera 122 may photograph an area of the cut portion FC that is larger than the maximum meandering distance of the film F at an appropriate resolution.

The cutting unit 130 is spaced apart from the meandering unit 120 at a predetermined interval and includes a laser cutter capable of irradiating a laser beam to the cutting unit FC. The laser cutter includes a laser source 132, a laser nozzle 134 located above the cut portion FC, and a beam guide member 136 for guiding the laser beam from the laser source 132 to the laser nozzle 134. Equipped. In addition, the laser source 132 of the laser cutter has a high applicability in the thickness range, and it is preferable to use a CO ₂ laser to prevent cracks and display defects from occurring.

The moving unit 140 is a cutting unit 130 according to the degree of meandering of the film recognized by the meander recognition unit 120 by a predetermined interval in the width direction of the film F orthogonal to the running direction of the film F. It is provided with a servo mechanism that can finely reciprocate. It is preferable that such a servo mechanism uses an electro-hydraulic servo mechanism using a servo valve and a hydraulic motor. On the other hand, the servo mechanism converts the position change amount with time of the cutting part FC of the film F into the voltage change amount with time, and positions the position of the laser nozzle 134 of the cutting unit 130 by PID and a high intensity following motion command. It is preferable to be linked with a motion controller (not shown) capable of cutting while following.

The servo mechanism is provided between the meandering recognition unit 120 and the cutting unit 130, and the cutting unit 130 is provided to be relatively movable with respect to the meandering recognition unit 120. That is, the meandering recognition unit 120, such as the camera 122, is fixed in position with respect to the device 100, and the cutting unit 130 is movable unit so as to be relatively movable with respect to the meandering recognition unit 120 in which the position is fixed. The servo mechanism of 140 is installed between the cutting unit 130 and the meandering recognition unit 120.

The meandering unit 120, the cutting unit 130, and the moving unit 140 have an integrated module structure. Such a module is configured to be movable in the width direction of the film F by the LM guide 180 in order to fix and set the center position of the cut portion FC in advance before the cutting process of the film F requiring cutting. Then, the cutting unit 130 is moved by the moving unit 140 with respect to the meander recognition unit 120 during the cutting operation of the film F while the position of the module is fixed with respect to the frame 101 of the apparatus 100. It can be moved finely.

The rewinding unit 150 includes rewinding rollers 152 for winding up each cut film CF cut by the cutting unit 130. Each rewinding roller 152 is driven by a rewinding motor (not shown). A plurality of idle rollers 170 on which the cut films CF are wound are installed between the rewinding unit 150 and the cutting unit 130.

Referring to FIG. 4, which is an enlarged view of the portion “A” of FIG. 2, the width W2 of the cut portion FC cut by the cutting unit 130 is approximately 0.2 mm. Therefore, since the width W1 of the cutting line L of the cut portion FC formed in the film F is 1.0 mm, the edge of each cut film CF cut by the cutting unit 130 is approximately 0.4 mm. There is an area of the cut portion of.

5 is a plan view schematically illustrating a configuration of a meandering adaptive film cutting device according to a second exemplary embodiment of the present invention, FIG. 6 is a right side view of FIG. 5, and FIG. 7 is a front view of FIG. 5, and FIG. 8 is an enlarged partial cross-sectional view of the meandering recognition unit, the cutting unit, and the moving unit portion shown in FIG. 6, FIG. 9 is a perspective view of a film illustrating a state before and after cutting, and FIG. 10 is a cross-sectional view of FIG. 9. The same components as those described in FIGS. 1 to 4 are the same members with the same functions.

5 to 10, the meander adaptive film cutting device 200 according to the second embodiment of the present invention may each have a width of approximately 400 mm that may be applied to, for example, a patterned retarder of a 32-inch display device. Three pattern regions PA each having a width of approximately 1400 mm with two side cutting lines LS formed at two edges, respectively, defined by a cutting portion FC such as two cutting lines L. A system for cutting film F (see FIGS. 9 and 10) into three cut films CF.

Therefore, in the present exemplary embodiment, the cut portions FC provided in the film F may include two cutting lines L formed in the length direction of the film F and a pair of side cut lines provided at both edges thereof. (LS). In addition, the meandering unit 120, the cutting unit 130, and the moving unit 140 may include two main cutting modules 240 and a pair of side cutting modules 340 all formed as one module. Equipped.

In each module 240, 340, the meandering recognition unit 120, the cutting unit 130, and the moving unit 140 are installed in a module plate MP, which module plate MP is subjected to a cutting process. It must be previously moved in the width direction of the film F perpendicular to the advancing direction of the film F to be fixed at a position corresponding to the two cutting lines L of the cut portions FC of the film F. In a state where the meandering recognition unit 120 is fixed on one module plate MP, the cutting unit 130 may be moved according to the meandering degree of the film F by the operation of the moving unit 140. .

The module plate MP of each module 240, 340 can move along the guide rail 102 provided in the frame 101, and the cutting lines L and the side cutting lines provided in the film F are provided. A fixing member (not shown) capable of fixing the position of the module plate MP at a position corresponding to the field LS is provided.

6 and 8, the moving unit 140 is an electro-hydraulic servo valve 142 installed between the camera bracket 124 of the meandering recognition unit 120 and the laser bracket 138 of the cutting unit 130. , A through hole H formed in the module plate MP to which the camera bracket 124 is fixed so that the beam guide member 136 installed on the laser bracket 138 can be penetrated, and the beam guide member of the cutting unit 130. The guides 144 provided on the camera bracket 124 are provided to guide the movement of the 136. Therefore, when the servo valve 142 is operated, the laser bracket 138 of the cutting unit 130 is finely moved with respect to the camera bracket 124 of the meander recognition unit 120 by fine adjustment by the controller. In this process, since the beam guide member 136 of the cutting unit 130 is guided by the guides 144, the position of the laser nozzle 134 may be finely adjusted.

Adaptive film cutting device 200 according to a preferred exemplary embodiment of the present invention, one for each module 240,340 to collect the debris of the film (F) cut by the cutting unit 130 The collection unit 190 is further provided. Each collection unit 190 is generated from the combustion gas, film F, generated during the projection and cutting process of the laser beam through the laser nozzle 134 of the laser cutter of the cutting unit 130, as described above. It is for collecting the foreign matter produced by debris or the like. To this end, the collection unit 190 is a tray 192 disposed below the film F so as to face the cutting unit 130 with the film F therebetween, and the discharge pipe 194 communicating with the tray 192. And a suction pump 196 installed in communication with the discharge pipe 194. On the other hand, the collection unit 190 is preferably arranged to move in the width direction of the film (F) in conjunction with each module 240,340.

Meanwhile, in the present exemplary embodiment, the state in which the two main cutting modules 240 are provided is described, but when there is only one cutting line L formed on the film F, one of the main cutting modules 240 may be used. Only the modules 240 and 340 may be used, and the other one may not be used. In addition, when the side cutting lines LS are not formed in the film F, it will be apparent to those skilled in the art that only the main cutting module 240 may be used without using the side cutting modules 340.

The operation of the meandering adaptive film cutting device according to the second embodiment of the present invention as described above will be described.

First, as shown in FIGS. 6 and 9, the film F wound around the unwinding roller 112 is removed from the unwinding unit 110 with the tension adjusting unit 160 having the dancing rollers 162. Prepare to unwind via. Here, three pattern regions PA are partitioned by two cutting lines L in the film F, and side cutting lines LS are formed at edges of the film F, respectively.

Subsequently, as shown in FIG. 5, the pair of side cutting modules 340 are moved along the guide rails 102 provided in the frame 101 in the left and right directions, respectively, so that the respective side cutting lines LS are disposed. Fix the position of the side cutting module 340 at a position corresponding to the. In addition, the main cutting module 240 moves to a position corresponding to the main cutting lines LM to fix the position with respect to the frame 101. As the reference point of the position fixing, it is preferable to use a method of matching the focus of the camera of the meandering recognition unit 120 to the center of the width direction of each cutting line L. FIG.

Next, as shown in FIG. 6, the film F unwound from the unwinding unit 110 is tensioned by the dancing rollers 162 of the tension adjusting unit 160, and the idle rollers ( 170). Then, through the cameras 122 of the meander recognition unit 120 installed above each of the main cutting line LM and the side cutting line LS, the cutting lines L of the film F traveling. The area is photographed to recognize the degree of meandering of the corresponding cutting line L, and the information is sent to the controller. Here, the driving degree of the cutting line L photographed by each camera 122 of the meandering unit 120 may have a different value at each portion.

Subsequently, the meandering degree (position change amount) of the cutting lines L is converted to, for example, a voltage change amount by the control unit, and a compensation value thereof is determined, and each of the cutting lines L for cutting the cutting line L is determined by such compensation value. The position of the laser nozzle 134 of the cutting unit 130 is finely adjusted. That is, the laser nozzle 134 may cut the cutting part FC while finely adjusting the left and right directions from the first setting position in the width direction of the film F to travel. In this process, the laser beam generated from the laser source 132 is irradiated to the laser nozzle 134 through the beam guide member 136.

On the other hand, foreign substances such as combustion gas generated in the laser nozzle 134 of the cutting unit 130 and / or debris cut by the cutting line L of the film F may be disposed in the tray 192 of the collection unit 190. Is collected off on. The foreign matter collected in the tray 192 moves to the discharge pipe 194 by the operation of the vacuum suction pump 196.

Next, the three cut films CF whose cut portions FC are divided by the cutting unit 130 are three winding units each including a winding roller 152 via the idle rollers 170. It is separated and wound into the field 150.

FIG. 11 is a cross-sectional view illustrating a process in which a laser beam irradiated through the laser nozzle 134 cuts a central portion of the cut portion FC of the film F. FIG. 12 is a patterned diagram cut by FIG. 11. It is sectional drawing of a retarder, FIG. 13 is a top view of FIG.

11 to 13, the width W1 of the cutting line L formed between the adjacent pattern regions PA is approximately 1.0 mm, and is formed by the laser nozzle 134 of the cutting unit 130. Since the length to be cut is approximately 0.2 mm, the remaining length d of the cut portions at both edges of the patterned retarder PR where the cutting is completed is approximately 0.4 mm.

12 and 13, in the patterned retarder PR, the distance D between both edge cut portions FC and the pattern area PA is approximately 5 to 10 mm. That is, the patterned retarder PR used in the stereoscopic image display device has a patternless area in which no pattern is formed between the pattern area and the edge area.

Here, since the patterned retarder (PR) is usually a thin film of 0.1 mm or less, there is almost no crosstalk due to diffuse reflection in the thickness thereof, so that the 3D stereoscopic effect is not reduced and its absolute light transmittance (about 88 ~ 95 depending on the type). %) Is not much different from the absolute light transmittance (93%) of the glass and is used in a much thinner thickness than glass, so the relative transmittance is very high, which has the advantage of minimizing the luminance reduction.

In addition, the patterned retarder PR includes a base layer 12 and a pattern layer 14.

Substrate layer 12 is a TAC (triacetyl cellulose), in order to satisfy the excellent optical properties (high light transmittance, uniform refractive index distribution, etc.), mechanical properties without deformation above a certain level, ease of manufacturing process (ease of coating), etc. Cyclo olefin copolymer (COP), polyacrylate (Pac), poly ether sulfone (PES), poly carbonate (PC), poly ether ether keton (PEEK), polyimide (PI), poly methyl metha acrylate (PMMA), poly ether imide), PEN (poly ethyle nemaphthatlate), PVA (poly vinyl alcohol), PAR (polyarylate), PET (polyethylene terephtalate), PSF (polysulfone), amorphous fluorine resin and the like can be used.

The pattern layer 14 includes a photo-crosslinking method including a pattern alignment method of coating a photocrosslinkable liquid crystal on the substrate layer 12 and patterning the photocrosslinked liquid crystals to have different optical axes, and then photocrosslinking the resulting liquid crystal polymer film. It is formed by liquid crystal coating. On the other hand, in order to align the photocrosslinkable liquid crystals (reactive mesogene), a pattern rubbing alignment method and a photoalignment layer, in which a polyimide is coated on a substrate and baked at high temperature, and then a mask is applied and rubbing is performed. Pattern photo-alignment method of coating and applying photo mask, polarizing irradiation (or non-polarization irradiation) and aligning, and applying the mask to the surface formed by coating the substrate itself or the alignment layer. There is a pattern alignment forming method such as obliquely irradiating a beam or a plasma beam in a vacuum.

Meanwhile, according to the present invention, a new patterned retarder capable of realizing a cheaper and improved quality 3D stereoscopic image display device while presenting new advantages not available in the conventional patterned retarder product ( patterned retarder) and 3D LCD using the same.

While the foregoing detailed description and drawings illustrate preferred embodiments of the invention, it is evident that various additions, modifications, combinations and / or alternatives are possible without departing from the spirit and scope of the invention as defined in the appended claims. It should be understood that it can be made. In particular, it will be understood by those skilled in the art that the present invention may be embodied in other specific forms, structures, arrangements, ratios, using other elements, materials, components, without departing from the spirit essential features of the present invention. It will be appreciated by those skilled in the art that the present invention may be used with many modifications of the structure, arrangement, proportions, materials, and components so as to be particularly suited to the specific environments and operating conditions without departing from the principles of the invention. Furthermore, the features described herein may be used alone or in combination with other features. For example, features described in connection with one embodiment may be used interchangeably and / or interchangeably with features described in other embodiments. Accordingly, the presently disclosed embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, and not limited to the foregoing detailed description.

Those skilled in the art will appreciate that various modifications and variations of the present invention are possible without departing from the broad scope of the appended claims. Some of these have been discussed above and others will be apparent to those skilled in the art.

12... Substrate layer 14. Pattern layer
101... Frame 102... Guide rail
100,200... Cutting device 110... Unwinding unit
112 ... Unwinding roller 120... Meander recognition unit
122... Camera 124... Camera bracket
130 ... Cutting unit 132... Laser source
134... Laser nozzle 136... Beam guide member
138... Laser bracket 140... Mobile unit
142... Servo valve 150.. Rewinding unit
152... Rewinding roller 160... Tension control
162... Dancing roller 170... Children roller
180... LM guide 190... Collection unit
192... Tray 194... discharge pipe
196... Suction pump 240... Main cutting module
340... Side cutting module PA… Pattern area
L… Cutting line F… film
CF… Cut film LS... Side cutting line
PR… Patterned Retarder FC… Edge cut

Claims (38)

In a meadering-adadptive film cutting device in which at least two or more pattern regions can be divided in half by cutting the film by adapting to the meandering of the film defined by the cut formed in the longitudinal direction:
An unwinding unit in which the film is wound;
A meandering recognition unit installed to be spaced apart from the cut portion to recognize an area of the cut portion of the film that is unwound from the unwinding unit;
A cutting unit capable of cutting the cut portion and installed to be movable in a width direction of the cut portion;
A moving unit capable of finely moving the cutting unit to a substantially center in the width direction of the cutting part according to the degree of meandering of the film recognized by the meandering recognition unit; And
And at least two or more winding units for respectively winding at least two or more cut films cut by the cutting unit.
The method of claim 1,
The meandering recognition unit is a meander adaptive film cutting device, characterized in that it comprises a camera provided to photograph the cut portion of the film.
The method of claim 2,
The camera is a meander adaptive film cutting device, characterized in that the CCD camera.
The method of claim 1,
The cutting unit is a meander adaptive film cutting device, characterized in that provided with a laser cutter which is spaced apart from the meander recognition unit at a predetermined interval, and can irradiate a laser beam to the cutting unit.
The method of claim 4, wherein
The laser cutter is:
Laser source;
A laser nozzle positioned above the cut portion; And
And a beam guide member for guiding a laser beam from the laser source to the laser nozzle.
The method of claim 1,
And the moving unit includes a servo mechanism capable of moving the cutting unit by a predetermined interval in a direction orthogonal to the running direction of the film.
The method of claim 6,
The said servomechanism is provided between the said meandering recognition unit and the said cutting unit, The meandering adaptive film cutting device characterized by the above-mentioned so that the said cutting unit can be moved relative to the said meandering recognition unit.
The method of claim 1,
And the meandering recognition unit, the cutting unit, and the moving unit all constitute one module.
The method of claim 8,
The cut portions include at least two cut lines each formed in a length direction of the film;
And said module is divided into at least two main cutting modules, each of which may be arranged to correspond to each said cutting line.
10. The method of claim 9,
Meander adaptive film cutting device, characterized in that each of the main cutting module is movable in the width direction of the film.
The method of claim 8,
The cut portion further includes a pair of side cut lines respectively formed at both longitudinal edges of the film;
And said module further comprises a pair of side cutting modules respectively disposed to correspond to each said side cutting line.
The method of claim 11,
Each said side cutting unit is movable in the width direction of the said film, The meander adaptive film cutting apparatus characterized by the above-mentioned.
The method of claim 1,
And a tension control unit for adjusting the tension of the film from the unwinding unit to the meandering unit.
The method of claim 13,
And said tension control part includes a plurality of dancing rollers on which said film can be wound.
The method of claim 1,
The film comprises a patterned retarder film for a stereoscopic image display device;
Each said pattern region comprises a pattern of said patterned retarder.
The method of claim 1,
Meander adaptive film cutting device, characterized in that the width of the cut is approximately 0.8 to 1.0mm.
The method of claim 1,
A meander adaptive film cutting device, characterized in that the width of the cut portion cut by the cutting unit is approximately 0.2 mm.
The method of claim 1,
Meandering film cutting device, characterized in that the spacing between the cut and the pattern region is approximately 5 to 10mm.
The method of claim 1,
And a collecting unit for collecting the debris of the film cut by the cutting unit.
20. The method of claim 19,
The collection unit includes a tray disposed opposite the cutting unit with the film therebetween;
A discharge pipe communicating with the tray; And
Meander adaptive film cutting device characterized in that it comprises a suction pump installed in communication with the discharge pipe.
20. The method of claim 19,
And said collection unit is movable in the width direction of said film.
(a) unwinding the film from the unwinding unit at least two or more pattern regions defined by the cut formed in the longitudinal direction;
(b) recognizing a region of the cut portion of the film that is traveling through a meandering recognition unit spaced apart from the cut portion;
(c) cutting the cut-off portion by half while finely adjusting and controlling the cutting unit for cutting the cut-out portion to correspond to the position of the cut-off portion recognized by step (b); And
(d) separating the wound at least two or more cut films into at least two or more winding units and winding them.
The method of claim 22,
Step (b) is a meander adaptive film cutting method characterized in that it comprises the step of photographing the cut region of the film using a camera.
The method of claim 22,
The step (c) is a meander adaptive film cutting method characterized in that it is spaced apart from the meander recognition unit at a predetermined interval, the laser cutter capable of irradiating a laser beam to the cutting portion.
25. The method of claim 24,
The laser cutter is:
Laser source;
A laser nozzle positioned above the cut portion; And
And a beam guide member for guiding a laser beam from the laser source to the laser nozzle.
The method of claim 22,
And said step (c) comprises operating a servo mechanism capable of moving said cutting unit by a predetermined interval in a direction orthogonal to the running direction of said film.
The method of claim 26,
The servo mechanism is installed between the meandering recognition unit and the cutting unit, and the cutting unit is provided so that the cutting unit can move relative to the meandering recognition unit.
The method of claim 22,
The cut portions include at least two cut lines each formed in a length direction of the film;
And the steps (b) and (c) comprise operating at least two meandering recognition units and cutting units respectively disposed to correspond to the respective cutting lines.
The method of claim 28,
And moving the respective meandering recognition units and the cutting units in advance before the step (a) so as to correspond to the cutting lines.
The method of claim 22,
The cut portion further includes a pair of side cut lines respectively formed at both longitudinal edges of the film;
The step (b) and (c) further comprises the step of operating a pair of meander recognition units and the cutting units respectively disposed to correspond to each of the side cutting line.
The method of claim 30,
And positioning and fixing the pair of meandering recognition units and cutting units corresponding to each of the side cutting lines before step (a).
The method of claim 22,
Method for cutting meandering film, characterized in that the width of the cut is approximately 0.8 to 1.0mm.
The method of claim 22,
In the step (c), the width of the cut portion cut by the cutting unit is a meander adaptive film cutting method, characterized in that about 0.2mm.
The method of claim 22,
Wherein the spacing between the cutout and the pattern region is approximately 5-10 mm.
The method of claim 22,
In the step (c), further comprising the step of collecting the debris of the film cut by the cutting unit using a collection unit.
36. The method of claim 35,
The collection step is:
Collecting the debris into a tray of the collection unit; And
Meandering adaptive film cutting method comprising the step of discharging using a suction pump through a discharge pipe disposed in communication with the tray.
The method of claim 22,
The film is a meander adaptive film cutting method characterized in that the patterned retarder film.
38. A stereoscopic image display device comprising a patterned retarder film produced by the method of any one of claims 22-37.

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