TWI692398B - Device for controlling warpage and method for controlling warpage of optical film - Google Patents

Abstract

A device for controlling warpage is provided. The device includes a first limiting mechanism, a first movable roller and a first positioning roller. The first movable roller is mounted on the first limiting mechanism, and the first positioning roller is disposed adjacent to the first limiting mechanism. The first movable roller is moved by using the first positioning roller as an axis. A method for controlling warpage of an optical film is also provided.

Description

Warpage control device and method for controlling warpage of optical film

An apparatus and method for adjusting an optical film, and in particular to an apparatus and method for controlling warpage of an optical film.

Optical films are widely used in various objects in life, such as anti-glare materials for lamps, window insulation materials, filter materials for digital cameras, and flat panel displays. Flat panel display is one of the key development industries in recent years. Among them, the output value of liquid crystal display accounts for most of the flat panel display industry.

There are many types of optical films used in liquid crystal displays. With the frequent use of liquid crystal displays in various precision electronic products, such as mobile phones, wearable devices, computers, etc., the industry has increasingly demanded the quality of optical films.

Most optical films used in displays have a multi-layer structure, and are formed by bonding layers of different materials to each other. However, after the lamination of the optical film with a multilayer structure, there is stress between the film layers due to the different tensions of the layers, thus causing warpage of the optical film.

According to some embodiments of the present disclosure, a warpage control device is provided, including: a first limiting mechanism, a first movable roller, and a first positioning roller. The first movable roller is installed on the first limiting mechanism, and the first positioning roller is disposed adjacent to the first limiting mechanism. The first movable roller moves with the first positioning roller as an axis.

According to some embodiments of the present disclosure, a method for controlling warpage of an optical film is provided, which includes: providing an optical film; and introducing the optical film into a warpage control device. The warpage control device includes: a first limit mechanism, a first movable roller mounted on the first limit mechanism, and a first positioning roller disposed downstream of the first movable roller. The method for controlling the warpage of the optical film also includes: moving the first movable roller to the working position with the first positioning roller as the axis to contact the optical film.

In order to make the features or advantages of the present disclosure more comprehensible, preferred embodiments are described below in conjunction with the accompanying drawings, which are described in detail below.

The warpage control device and the method for controlling warpage of the optical film using the device will be described in detail below. It should be understood that the following description provides many different embodiments or examples for implementing different embodiments of the disclosed embodiments. The specific elements and arrangements described below are simply and clearly describing some embodiments of the present disclosure. Of course, these are only examples and not limitations of this disclosure. In addition, similar and/or corresponding reference numerals may be used to indicate similar and/or corresponding elements in different embodiments to clearly describe the present disclosure. However, the use of these similar and/or corresponding reference signs is only to briefly describe some embodiments of the present disclosure, and does not mean that there is any correlation between the different embodiments and/or structures discussed.

It should be understood that the elements or devices in the drawings may exist in various forms well known to those of ordinary skill in the technical field to which the invention belongs. In addition, embodiments may use relative terms, such as "lower" or "bottom" or "higher" or "top", to describe the relative relationship of one element of the drawing to another element. Understandably, if the device in the figure is turned upside down, the element on the "lower" side will become the element on the "higher" side. The disclosed embodiments can be understood together with the drawings, and the disclosed drawings are also regarded as part of the disclosure description. It should be understood that the drawings of the present disclosure are not drawn to scale. In fact, the size of the element may be enlarged or reduced arbitrarily in order to clearly show the features of the present disclosure.

In addition, the elements or devices in the drawings may exist in various forms well known to those of ordinary skill in the technical field to which the invention belongs. In addition, it should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, or parts, these elements, components, or parts should not be limited by these terms . These terms are only used to distinguish different elements, components, regions, layers or parts. Therefore, a first element, component, region, layer or section discussed below may be referred to as a second element, component, region, layer or section without departing from the teachings of the present disclosure.

In the text, the terms "about", "approximately", "substantially" and "substantially" are usually expressed within 20% of a given value or range, preferably within 10%, more preferably within 5%, Or within 3%, or within 2%, or within 1%, or within 0.5%. The quantity given here is an approximate quantity, that is, without specifying "about", "approximately", "substantially", "substantially", it is still possible to imply "about", "approximately", The meaning of "substantially" and "substantially". In addition, the terms "in the range of the first numerical value to the second numerical value" and "the range is the first numerical value to the second numerical value" mean that the range includes the first numerical value, the second numerical value, and other numerical values therebetween.

In some embodiments of the present disclosure, terms such as "connect" and "interconnect" with regard to bonding and connection may refer to the two structures being in direct contact, or may refer to the two structures not being in direct contact unless specifically defined. There are other structures between these two structures. In addition, the term “joining and connecting” may also include a case where both structures are movable or both structures are fixed.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. It is understandable that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and this disclosure, and should not be interpreted in an idealized or excessively formal manner. Unless specifically defined in the disclosed embodiments.

In order to improve or correct the warpage of the optical film, a feasible method includes peeling off the surface film layer of the warped optical film to release the stress, and using a new replacement film for lamination again. Alternatively, the warpage correction roller can be used to apply stress to the surface of the optical film to relieve the stress in the structure. However, the replacement of the optical film will result in a large number of discarded optical films, which will cost a lot, and the applicable direction and angle range of the warpage correction roller is limited, and if you want to change the configuration relationship between the optical film and the roller, you must cut Cutting the optical film and re-passing the film, but still unable to completely meet the needs.

The disclosed embodiment provides a warpage control device, which includes a warpage adjustment roller that can move in multiple directions and angles. Therefore, the warpage control device can instantly and easily adjust the application of the warpage adjustment roller according to the characteristics of different optical films The stress of the optical film improves the warpage of the optical film. In addition, according to some embodiments of the present disclosure, the warpage control device may further include a rotatable positioning roller, whereby the arrangement direction of the optical film on the roller can be easily changed, and the steps of cutting the optical film and re-passing the film can be omitted .

FIG. 1 shows a schematic structural diagram of a warpage control device 10 according to some embodiments of the present disclosure. It should be understood that according to some embodiments, additional features may be added to the warpage control device 10 described below. In addition, the X-axis and Y-axis in the drawings are labels for convenience of explaining the operation of the warpage control device 10.

In some embodiments, the warpage control device 10 may be used to adjust the degree of warpage of the optical film 100. The optical film 100 may be a single-layer optical film or an optical film laminate. In some embodiments, the optical film 100 processed by the optical film processing apparatus 10 exists in the form of a roll.

In some embodiments, the warpage control device 10 may be disposed downstream of a bonding roller (not shown) for bonding multiple optical films. In some embodiments, the warpage control device 10 may be disposed downstream of the drying furnace (not shown). It should be understood that, according to actual requirements, the warpage control device 10 may be disposed at any process stage where the optical film is prone to warpage or deformation.

In addition, in some embodiments, the optical film 100 may be a single-layer or multi-layer film material, including optical gain, alignment, compensation, steering, orthogonal, diffusion, protection, anti-sticking, scratch resistance, anti-glare, Useful films such as reflection suppression and high refractive index, such as polarizing film, release film, wide viewing angle film, brightness enhancement film, reflective film, protective film, with controlled viewing angle compensation or birefraction Characteristic alignment liquid crystal film, hard coating film, anti-reflection film, anti-sticking film, diffusion film, anti-glare film and other surface-treated films or a combination of the above, but not limited to this.

In some embodiments, the optical film 100 may include two protective layers and a polarizing film sandwiched between the protective layers.

In some embodiments, the protective film may be a single-layer or multi-layer structure, and is a thermoplastic resin with excellent transparency, mechanical strength, thermal stability, moisture barrier properties, and the like. The thermoplastic resin may include cellulose resin (for example, triacetate cellulose (TAC) or diacetate cellulose (DAC)), acrylic resin (for example, poly(methyl methacrylate) ), PMMA), polyester resin (for example, polyethylene terephthalate (PET) or polyethylene naphthalate), olefin resin, polycarbonate resin, cycloolefin resin, oriented stretching Oriented polypropylene (OPP), polyethylene (PE), polypropylene (PP), cyclic olefin polymer (COP), cyclic olefin copolymer (COC) ) Or a combination of the foregoing. In some embodiments, the material of the protective film may include (meth)acrylic system, urethane system, acrylic urethane system, epoxy system, polysiloxane system Such as thermosetting resin or ultraviolet curing resin. In addition, the protective film may be further subjected to surface treatment, for example, anti-glare treatment, anti-reflection treatment, hard coating treatment, antistatic treatment or anti-fouling treatment.

In some embodiments, the polarizing film may be formed of a polyvinyl alcohol (PVA) film that adsorbs aligned dichroic pigments or a liquid crystal material doped with absorbing dye molecules. Polyvinyl alcohol can be formed by saponifying polyvinyl acetate. In some embodiments, the polyvinyl acetate may be a vinyl acetate monomer or a copolymer of vinyl acetate and other monomers. The other monomers mentioned above may be unsaturated carboxylic acids, olefins, unsaturated sulfonic acids, vinyl ethers or the like. In other embodiments, the polyvinyl alcohol may be modified polyvinyl alcohol, for example, aldehyde-modified polyvinyl formaldehyde, polyvinyl acetaldehyde, or polyvinyl butyraldehyde.

Referring to FIG. 1, the warpage control device 10 may include a first limiting mechanism 200a, a first movable roller 102a, and a first positioning roller 104a. The first movable roller 102a is installed on the first limiting mechanism 200a, and can move on the path or track defined by the first limiting mechanism 200a. In some embodiments, the first movable roller 102a may be moved to a specific position according to the nature of the optical film 100 or process requirements, so that the first movable roller 102a applies appropriate tension on the optical film 100. In addition, in some embodiments, the position of the first position-limiting mechanism 200 a may overlap with the travel path of the optical film 100.

Furthermore, the first positioning roller 104a can guide the traveling direction of the optical film 100. The first positioning roller 104a is disposed adjacent to the first limiting mechanism 200a. In some embodiments, the first positioning roller 104 a is disposed downstream of the first movable roller 10. In some embodiments, when viewed from a side view angle of the optical film 100 (that is, from a view angle perpendicular to the transmission direction of the optical film 100, for example, the XY plane shown in the figure), the first positioning roller 104a may be disposed at The inside of the first limit mechanism 200a. In addition, the first movable roller 102a can move on the first limiting mechanism 200a, using the first positioning roller 104a as an axis (positioning axis). In some embodiments, the first positioning roller 104a overlaps with the geometric center CT _{1 of the} first limiting mechanism 200a.

The first movable roller 102a and the first positioning roller 104a are separated by a first distance D ₁ . In some embodiments, the first distance D ₁ may range from about 30 mm to about 500 mm, about 50 mm to about 300 mm, or about 100 mm to about 150 mm. It should be noted that if the first distance D _{1 is} too large (for example, greater than 500 mm) or too small (for example, less than 30 mm), it may cause a burden on mechanical design or manufacturing costs.

Furthermore, according to some embodiments, the first distance D ₁ may be defined as the distance between the center of the first movable roller 102a and the center of the first positioning roller 104a. According to other embodiments, the first distance D ₁ may be defined as the minimum distance between the first movable roller 102a and the first positioning roller 104a.

In some embodiments, the first limiting mechanism 200a may include a track, a turntable, a positioning pin and a positioning hole, other suitable limiting mechanisms, or a combination of the foregoing. In some embodiments, the first movable roller 102a may be fixed on the first limiting mechanism 200a, and the first movable roller 102a may be moved by changing the position of the first limiting mechanism 200a. For example, in some embodiments, the first movable roller 102a can be moved to a specific position by rotating the first limiting mechanism 200a. In other embodiments, the position of the first limiting mechanism 200a does not change, and the first movable roller 102a itself can move in the first limiting mechanism 200a.

In some embodiments, the diameter r ₁ of the first movable roller 102a may range from about 75 mm to about 125 mm, about 80 mm to about 110 mm, or about 90 mm to about 110 mm. In some embodiments, the diameter r ₂ of the first positioning roller 104a may range from about 75 mm to about 125 mm, about 80 mm to about 110 mm, or about 90 mm to about 110 mm. The diameter r _{1 of the} first movable roller 102a may be the same as or different from the diameter r _{2 of the} first positioning roller 104a.

In some embodiments, the materials of the first movable roller 102a and the first positioning roller 104a may include stainless steel, titanium alloy, or a combination of the foregoing. The stainless steel is, for example, SUS304, SUS304L, SUS309, SUS309S, SUS310S, SUS311, SUS314, SUS321, SUS345, SUS348, SUS403, SUS410, SUS405, SUS406, SUS410, SUS414, SUS430, SUS330F, SUS431, SUS440A~C, SUS442, SUS443 , SUS446, SUS447JI, SUS630, SUS JIS 35, SUS XM 27, SHOMAC30-2, SEA-CURE, HR-8N, SUS 316, SUS 316L, SUS317, SUS317L, SUS316J1, SUS316J2, CARPENTER 20 or MONIT, but not limited to this .

In some embodiments, the wheel surfaces of the first movable roller 102a and/or the first positioning roller 104a may be mirror polished or plated with a coating layer, wherein the coating layer material may include metallic chromium or other non-metallic materials, for example, Ceramics, Teflon, silicone, etc. The main reason for the existence of the coating layer is to prevent the film surface from being scratched, electrostatic adsorption, and anti-roller wear. The choice of materials is not limited to the above, and it is better not to scratch the optical film surface.

As shown in FIG. 1, in some embodiments, the warpage control device 10 further includes a second positioning roller 104b. The second positioning roller 104b can further guide the traveling direction of the optical film 100. In some embodiments, the second positioning roller 104b is disposed downstream of a positioning roller 104a. In some embodiments, the second positioning roller 104b may partially overlap the first positioning mechanism 200a.

The second positioning roller 104b and the first positioning roller 104a are separated by a second distance D ₂ . In some embodiments, the second distance D ₂ may range from about 30 mm to about 500 mm, about 50 mm to about 300 mm, or about 100 mm to about 150 mm. It should be noted that if the second distance D _{2 is} too large (for example, greater than 500 mm) or too small (for example, less than 30 mm), it may cause a burden on mechanical design or manufacturing costs.

In addition, according to some embodiments, the second distance D _{2 may be} defined as the distance between the center of the first positioning roller 104a and the center of the second positioning roller 104b, or the center of the first positioning roller 104a and the second positioning The minimum distance between the rollers 104b.

In some embodiments, the first distance D ₁ between the first movable roller 102a and the first positioning roller 104a may be substantially equal to the second distance D ₂ between the first positioning roller 104a and the second positioning roller 104b. In some embodiments, the first having a proportional relationship between the distance D ₁ and the second distance D _2, D ₁ ratio of the first distance and the second distance D ₂ of 0.5: 1.5: 1 to 1. For example, in some embodiments, the second positioning roller 104b may be away from the first limiting mechanism 200a and does not overlap with the first limiting mechanism 200a.

In some embodiments, the diameter r ₃ of the second positioning roller 104b may range from about 75 mm to about 125 mm, about 80 mm to about 110 mm, or about 90 mm to about 110 mm. Furthermore, the diameter r _{3 of the} second positioning roller 104b may be the same as or different from the diameter r _{1 of the} first movable roller 102a and/or the diameter r _{2 of the} first positioning roller 104a.

Moreover, the material of the second positioning roller 104b may be the same as or similar to the material of the first movable roller 102a and/or the first positioning roller 104b, and will not be repeated here.

In addition, as shown in FIG. 1, the optical film 100 may sequentially pass through the first movable roller 102a, the first positioning roller 104a, and the second positioning roller 104b. Specifically, the optical film 100 is in contact with the first movable roller 102a and the first positioning roller 104a, and the optical film 100 extending on the first movable roller 102a can form a first wrap angle θ ₁ on the first movable roller 102a. In some embodiments, the first holding angle θ ₁ may range from about 0 degrees to about 220 degrees, about 5 degrees to about 180 degrees, or about 30 degrees to about 160 degrees.

According to some embodiments, the first holding angle θ ₁ refers to the direction from the central axis of the first movable roller 102a (ie, from the side view angle of the first movable roller 102a, for example, the XY plane shown in the figure ) When viewing, in a state where the optical film 100 is in contact with the conveying surface of the first movable roller 102a, the optical film 100 is on the upstream side of the conveying direction (the direction of the arrow marked by the optical film 100 in the figure) of the first movable roller 102a. The tangent line of the contact point forms an angle with the tangent line of the contact point of the optical film 100 on the downstream side in the conveying direction with the first movable roller 102a.

Similarly, the optical film 100 is in contact with the first positioning roller 104a and the second positioning roller 104b, and the optical film 100 extending on the first positioning roller 104 can form a second wrap angle θ ₂ on the first positioning roller 104. In some embodiments, the second holding angle θ ₂ may range from about 0 degrees to about 220 degrees, about 5 degrees to about 180 degrees, or about 30 degrees to about 160 degrees.

According to some embodiments, the second holding angle θ ₂ refers to the direction from the central axis of the first positioning roller 104a (ie, from the side view angle of the first positioning roller 104a, for example, the XY plane shown in the figure ) When viewing, in a state where the optical film 100 is in contact with the conveying surface of the first positioning roller 104a, the optical film 100 is on the upstream side of the conveying direction (arrow direction indicated by the optical film 100 in the figure) and the first positioning roller 104a. The tangent line of the contact point forms an angle with the tangent line of the contact point of the optical film 100 on the downstream side in the conveying direction with the first positioning roller 104a.

As shown in FIG. 1, the first movable roller 102a can be moved to different positions. As the position of the first movable roller 102a is different, the first holding angle θ ₁ and the second holding angle θ ₂ will change. For example, in some embodiments, the first movable roller 102a can be moved to the first position P ₁ so that it is aligned with the first positioning roller 104a and the second positioning roller 104b to be substantially in line. In addition, according to some embodiments, the effective operating angle θ _A of the first movable roller 102a may range from 0 degrees to 177 degrees.

In detail, in some embodiments, when the first movable roller 102a moves from the initial position by more than 90 degrees, the first movable roller 102a, the first positioning roller 104a, and the second positioning roller 104b may have a specific relationship ,described as follows. In addition, the initial position may be a position where the first movable roller 102a only contacts the optical film 100, but no tension is applied to the optical film 100 (for example, the first movable roller 102a is located on the +Y axis shown in the figure) .

According to the foregoing, as shown in FIG. 1, the first movable roller 102a can move from the initial position by more than 90 degrees to the second position P ₂ , which is separated from the second positioning roller 104b by a third distance D ₃ , and the first movable roller 102a CL _1, and the connection between the roller 104a and the second roller 104b is positioned a first positioning CL ₂ forms an angle θ _i and the connection between the first roller 104a is positioned. In some embodiments, the third distance D ₃ , the included angle θ _i, and the second distance D ₂ between the first positioning roller 104 a and the second positioning roller 104 b conform to the following relationship: θ _i =tan ^-1 (D ₃ /D ₂ ).

In some embodiments, the third distance D ₃ may range from about 5 mm to about 30 mm or about 30 mm to about 70 mm. According to some embodiments, the third distance D _{3 may be} defined as the distance between the position where the line CL ₁ is tangent to the first movable roller 102a and the position where the line CL _{2 is} tangent to the second positioning roller 104b. In some embodiments, the included angle θ _i may range from 3 degrees to 90 degrees. In addition, according to some embodiments, the connection line CL ₁ refers to a tangent on the opposite side with the smallest distance between the first movable roller 102a and the first positioning roller 104a, that is, the tangent line is located between the first movable roller 102a and the first positioning roller Different sides of 104a (for example, the first movable roller 102a is located on the right side and the first positioning roller 104a is located on the left side relative to the connection line CL ₁ ). Furthermore, according to some embodiments, the line CL ₂ refers to the same-side tangent with the smallest distance between the first positioning roller 104a and the second positioning roller 104b, that is, the tangent is located between the first positioning roller 104a and the second positioning the same side of the roller 104b (e.g., with respect to the connection CL _2, a first roller 104a is positioned on the left side, the second roller 104b is also positioned on the left), and this tangent line is closer to the tangent of the first movable roller 102a.

Next, please refer to FIG. 2, which shows a schematic structural diagram of a warpage control device 20 according to other embodiments of the present disclosure. It should be understood that the same or similar components or elements in the following will be denoted by the same or similar reference numerals, and their materials and functions are the same or similar to those described above, so this part will not be repeated in the following.

The warpage control device 20 shown in FIG. 2 is substantially similar to the warpage control device 10 shown in FIG. 1, the difference is that in this embodiment, the warpage control device 20 can be provided in the same direction as the warpage control device 10 The opposite tension is applied to the optical film 100. The configuration of the warpage control device 20 may be the same as the warpage control device 10, but by changing the arrangement direction of the optical film 100, that is, changing the optical film 100 and the first movable roller 102a, the first positioning roller 104a, and the second The direction of the contact surface of the roller 104b is positioned to apply reverse tension to the optical film 100.

Specifically, taking the coordinates shown in FIG. 2 as an example, the first movable roller 102a can move substantially from the +Y axis position to the -X axis and -Y axis positions, and the first movable roller 102a can move substantially A counterclockwise force is applied to the optical film 100 in the range of +Y axis to -Y axis. On the other hand, in the embodiment shown in FIG. 1, the first movable roller 102a can be moved substantially from the +Y axis position to the +X axis and -Y axis positions, and the first movable roller 102a can be substantially A clockwise force is applied to the optical film 100 in the range from +Y axis to -Y axis.

Next, please refer to FIG. 3 and FIG. 4, FIG. 3 shows a schematic structural diagram of the warpage control device 30 according to other embodiments of the present disclosure, and FIG. 4 shows warpage control according to other embodiments of the present disclosure. Schematic diagram of the device 40. The warpage control device 30 shown in FIG. 3 is substantially similar to the warpage control device 10 shown in FIG. 1, the difference is that the first limit mechanism 200a of the warpage control device 30 has a rectangular shape, and FIG. 1 The warpage control device 10 shown has a circular first limiting mechanism 200a. On the other hand, the difference between the warpage control device 40 shown in FIG. 4 and the warpage control device 10 shown in FIG. 1 is that the first limit mechanism 200 a of the warpage control device 40 has a pentagonal shape.

In some embodiments, the shape of the first limiting mechanism 200a may include a circle, a semicircle, an ellipse, a rectangle, a pentagon, a hexagon, an irregular shape, other suitable shapes, or the foregoing combination. It should be understood that, in different embodiments, the first limiting mechanism 200a having an appropriate shape may be selected according to actual needs.

According to the foregoing, according to some embodiments of the present disclosure, it is possible to apply different directions of tension to the optical film 100 at different angles through specific arrangements of the first movable roller 102a, the first positioning roller 104a, and the second positioning roller 104b. To adjust or reduce the warpage of the optical film 100. Compared with the adjustment of the movable roller that can only move linearly (one-dimensional) with a limited warping angle, the warp control device 10 of the embodiment of the present disclosure can further move the movable roller in a planar (two-dimensional) manner to increase the adjustable winding degree.

Next, please refer to FIG. 5A. FIG. 5A shows a schematic structural diagram of a warpage control device 50 according to other embodiments of the present disclosure. The warpage control device 50 shown in FIG. 5A is substantially similar to the warpage control device 10 shown in FIG. 1, the difference is that the warpage control device 50 may further include a second movable roller 102b and a second limit mechanism 200b . The second movable roller 102b may be installed on the first limiting mechanism 200a, and may move on a path or track defined by the first limiting mechanism 200a. The second movable roller 102b can move on the first limiting mechanism with the first positioning roller 104a as the axis.

In some embodiments, the second movable roller 102b may be moved to a specific position according to the nature of the optical film 100 or process requirements, so that the second movable roller 102b applies appropriate tension to the optical film 100. In some embodiments, the first movable roller 102a or the second movable roller 102b may be selected as the working roller to apply tension to the optical film 100 according to process requirements.

In some embodiments, the second movable roller 102b and the first positioning roller 104a are separated by a fourth distance D ₄ . In some embodiments, the fourth distance D ₄ may range from about 30 mm to about 500 mm, about 50 mm to about 300 mm, or about 100 mm to about 150 mm. According to some embodiments, the fourth distance D ₄ may be defined as the distance between the center of the second movable roller 102b and the center of the first positioning roller 104a, or between the second movable roller 102b and the first positioning roller 104a The minimum distance.

In some embodiments, the diameter r ₄ of the second movable roller 102b may range from about 75 mm to about 125 mm, about 80 mm to about 110 mm, or about 90 mm to about 110 mm. The diameter r _{4 of the} second movable roller 102b may be the same as or different from the diameter r _{1 of the} first movable roller 102a.

Furthermore, the material of the second movable roller 102b may be the same as or similar to the material of the aforementioned first movable roller 102a, and will not be repeated here.

According to the foregoing, the second limiting mechanism 200b may further include a second limiting mechanism 200b, and the first positioning roller 104a and the second positioning roller 104b may fix the second limiting mechanism 200b. In some embodiments, the first positioning roller 104a and the second positioning roller 104b may be oppositely arranged.

In addition, in some embodiments, the position of the second position-limiting mechanism 200b may overlap the travel path of the optical film 100. In detail, in some embodiments, the geometric center CT _{2 of the} second limiting mechanism 200b may overlap the travel path of the optical film 100.

In some embodiments, the second limiting mechanism 200b may include a track, a turntable, a positioning pin, a positioning hole, other suitable limiting mechanisms, or a combination of the foregoing. In some embodiments, the second limit mechanism 200b may partially overlap the first limit mechanism 200a. Furthermore, the second limiting mechanism 200b and the first limiting mechanism 200a may have the same or different shapes. In some embodiments, the size of the first limiting mechanism 200a is larger than the size of the second limiting mechanism 200b. For example, in some embodiments where the first limiting mechanism 200a and the second limiting mechanism 200b are circular, the radius of the first limiting mechanism 200a is larger than the radius of the second limiting mechanism 200b.

According to the foregoing, in some embodiments, the first positioning roller 104a and the second positioning roller 104b may be fixed to the second limiting mechanism 200b, and the second limiting mechanism 200b is rotatable. In some embodiments, the positions of the first positioning roller 104a and the second positioning roller 104b can be changed by rotating the second limiting mechanism 200b.

Next, please refer to FIGS. 5A-5C. FIGS. 5A-5C show a schematic diagram of the structure of the warpage control device 50 during the operation according to some embodiments of the present disclosure. The method of controlling the warpage of the optical film 100 in some embodiments of the present disclosure will be described below with the operation process of the warpage control device 50. It should be understood that although the following description only uses the warpage control device 50 as an example to describe the method of controlling the warpage of the optical film 100, those of ordinary skill in the art to which the invention belongs can also use other warpage control devices to implement optical control accordingly. The method of warping the film 100.

First, please refer to FIG. 5A, the method of controlling the warpage of the optical film 100 includes the following steps: providing the optical film 100, introducing the optical film 100 into the warpage control device 50, and moving the first positioning roller 104a as the axis A movable roller 102a reaches the working position P _w to stretch the optical film 100.

In the above steps, the first movable roller 102a serves as a working roller. In addition, the second movable roller 102b may be disposed at the idle position P _i as an idle roller. In some embodiments, the working position P _w and the idle position P _i can be set according to the properties of the optical film 100 or process requirements. In addition, the optical film 100 may have two opposing surfaces 100A and 100B. In this step, the optical film 100 is in contact with the first movable roller 102a with the surface 100A, and furthermore, with the surface 100B and the surface 100A and the first positioning roller, respectively 104a and the second positioning roller 104b are in contact.

Next, referring to FIG. 5B, in some embodiments, the optical film 100 of the warpage control method may further comprise the steps of: a first movable roller 102a is moved to the idle position P _i, and a second rotation limiting mechanism 200b To prevent the optical film 100 from contacting the first positioning roller 104a and the second positioning roller 104b.

More specifically, a first movable roller 102a is moved to the idle position P _i, it does not contact with the optical film 100, and further, the first position of the movable idle roller 102a where the P _i and the second location of the movable idle roller 102b different positions P _i. According to some embodiments, any position on the first limiting mechanism 200a that is not in contact with the optical film 100 may be regarded as an idle position P _i .

In addition, according to the direction of the arrow shown in FIG. 5A, the second limit mechanism 200b can be rotated to move the optical film 100 from between the first movable roller 102a and the second movable roller 102b and between the first positioning roller 104a and the second positioning Pass between rollers 104b. In this step, the first movable roller 102a, the second movable roller 102b, the first positioning roller 104a, and the second positioning roller 104b are not in contact with the optical film 100.

Next, referring to FIG. 5C, in some embodiments, the method of controlling the warpage of the optical film 100 may further include the following steps: continue to rotate the second limiting mechanism 200b, so that the optical film 100 and the first positioning roller 104a and The second positioning roller 104b contacts.

In detail, the second limiting mechanism 200b can be rotated in the same direction as the previous step (for example, the arrow direction shown in FIG. 5B) until the optical film 100 is on the other surface with the first positioning roller 104a and The second positioning roller 104b contacts. Specifically, in this step, the optical film 100 contacts the first positioning roller 104a and the second positioning roller 104b with the surface 100B and the surface 100A, respectively.

In addition, in some embodiments, the method of controlling the warpage of the optical film 100 may further include the following step: moving the second movable roller 102 b to the working position P _w to make it contact the optical film 100. In this step, the optical film 100 may be in contact with the second movable roller 102b on the surface 100A.

According to the foregoing, according to some embodiments, the method of controlling the warpage of the optical film 100 can simply switch the arrangement direction of the optical film 100 relative to the roller, and can change the direction of the tension applied to the optical film 100 by the roller.

In summary, according to some embodiments of the present disclosure, the warpage control device includes a movable roller that can move in a variety of directions and angles, which can be adjusted instantly and simply according to the characteristics of different optical films. Stress, improve the warpage of the optical film. In addition, according to some embodiments of the present disclosure, the warpage control device may further include a rotatable positioning roller, whereby the arrangement direction of the optical film on the roller can be easily changed, and the steps of cutting the optical film and re-passing the film can be omitted To simplify the process.

Although the embodiments and advantages of the present disclosure have been disclosed above, it should be understood that anyone with ordinary knowledge in the technical field can make changes, substitutions, and retouching without departing from the spirit and scope of the present disclosure. In addition, the scope of protection of this disclosure is not limited to the processes, machines, manufacturing, material composition, devices, methods, and steps in the specific embodiments described in the specification. Anyone with ordinary knowledge in the technical field can refer to the disclosure content of this disclosure Understand current or future developed processes, machines, manufacturing, material composition, devices, methods, and steps, as long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein, they can be used according to the present disclosure. Therefore, the protection scope of the present disclosure includes the aforementioned processes, machines, manufacturing, material composition, devices, methods and steps. In addition, each patent application scope constitutes an individual embodiment, and the protection scope of the present disclosure also includes a combination of each patent application scope and embodiment. The scope of protection of this disclosure shall be subject to the scope defined in the attached patent application.

10, 20, 30, 40, 50: warpage control device

100: optical film

100A, 100B: surface

102a: the first movable roller

102b: second movable roller

104a: the first positioning roller

104b: second positioning roller

200a: the first limit mechanism

200b: second limit mechanism

CT ₁ , CT ₂ : geometric center

CL ₁ , CL ₂ : connection

D ₁ : first distance

D ₂ : Second distance

D ₃ : third distance

D ₄ : Fourth distance

P ₁ : first position

P ₂ : second position

P _i : idle position

P _w : working position

r ₁ , r ₂ , r ₃ , r ₄ : diameter

θ ₁ : first angle

θ ₂ : second holding angle

θ _A : effective operating angle

θ _i : included angle

Figure 1 shows a schematic structural view of a warpage control device according to some embodiments of the present disclosure; Figure 2 shows a structural schematic view of a warpage control device according to some embodiments of the present disclosure; Figure 3 shows some embodiments according to the present disclosure In FIG. 4, the schematic diagram of the structure of the warpage control device; FIG. 4 shows the schematic diagram of the structure of the warpage control device according to some embodiments of the disclosure; FIGS. 5A-5C show the operation of the warpage control device in some embodiments according to the disclosure Schematic diagram of the process.

10: warpage control device

100: optical film

102a: the first movable roller

104a: the first positioning roller

104b: second positioning roller

200a: the first limit mechanism

CT ₁ : Geometric center

CL ₁ , CL ₂ : connection

D ₁ : first distance

D ₂ : Second distance

D ₃ : third distance

P ₁ : first position

P ₂ : second position

r ₁ , r ₂ , r ₃ : diameter

θ ₁ : first angle

θ ₂ : second holding angle

θ _A : effective operating angle

θ _i : included angle

Claims (22)

A warpage control device includes: a first limit mechanism; a first movable roller mounted on the first limit mechanism; a first positioning roller located adjacent to the first limit mechanism, wherein the first A first distance between the movable roller and the first positioning roller; and a second positioning roller, wherein the second positioning roller and the first positioning roller are separated by a second distance, and wherein the first movable roller The first positioning roller is used as the axis to move. The warpage control device as described in item 1 of the patent application range, wherein the first distance is the distance between the center of the first movable roller and the center of the first positioning roller or the first movable roller and the first One of the minimum distances between the positioning rollers. The warpage control device as described in item 1 of the patent application range, wherein the first distance ranges from 30 mm to 500 mm. The warpage control device as described in item 1 of the patent application, wherein the first limit mechanism includes a rail, a turntable, a positioning pin, a positioning hole, or a combination of the foregoing. The warpage control device as described in item 1 of the patent application, wherein the first limit mechanism has a circular, semi-circular, elliptical, rectangular, pentagonal, hexagonal, irregular, or a combination of the foregoing . The warpage control device as described in item 1 of the patent application scope, wherein the second distance is the distance between the center of the first positioning roller and the center of the second positioning roller, or the center of the first positioning roller and One of the minimum distances between the second positioning rollers. The warpage control device as described in item 1 of the patent application range, wherein the second distance ranges from 30 mm to 500 mm. The warpage control device as described in item 1 of the patent application scope, wherein the ratio of the first distance to the second distance is between 0.5:1 and 1:1.5. The warpage control device as described in item 1 of the patent application range, wherein the diameter of the first movable roller ranges from 75 mm to 125 mm, and/or the diameter of the first positioning roller ranges from 75 mm to 125 mm. The warpage control device as described in item 1 of the patent application, wherein the first movable roller can be moved to a first position so that it is aligned with the first positioning roller and the second positioning roller. The warpage control device as described in item 1 of the patent scope, wherein the first movable roller can be moved to a second position so that it is separated from the second positioning roller by a third distance, and the first movable roller and the The tangent of the opposite side with the smallest distance between the first positioning rollers and the distance between the first positioning roller and the second positioning roller with the smallest distance and the same side tangent close to the first movable roller form an angle, the second distance being the first The distance between the center of the positioning roller and the center of the second positioning roller, and the third distance is the position where the opposite-side tangent line tangent to the first movable roller and the same-side tangent line tangent to the second positioning roller The distance between the positions of, where the third distance (marked as D ₃ ), the included angle (marked as θ _i ) and the second distance (marked as D ₂ ) conform to the following relationship: θ _i =tan ^-1 ( D ₃ /D ₂ ). The warpage control device as described in item 11 of the patent application range, wherein the included angle ranges from 3 degrees to 90 degrees; or the third distance ranges from 5 mm to 70 mm. The warpage control device as described in item 1 of the patent application scope further includes a second movable roller mounted on the first limiting mechanism, and the second movable roller moves about the first positioning roller as an axis. The warpage control device as described in item 1 of the patent application scope further includes a second limit mechanism, wherein the first positioning roller and the second positioning roller are fixed on the second limit mechanism, and the second The limit mechanism is rotatable. A method for controlling warpage of an optical film, comprising: providing an optical film; introducing the optical film into a warpage control device, the warpage control device comprising: a first limit mechanism; a first movable roller, which is installed on On the first limit mechanism; a first positioning roller is arranged downstream of the first movable roller; and a second positioning roller is arranged downstream of the first positioning roller; and the first positioning roller is used as an axis Moving the first movable roller to a working position to contact the optical film, wherein the optical film is in contact with the first positioning roller and the second positioning roller, and a second hug is formed on the first positioning roller Angle, wherein the second holding angle ranges from 0 degrees to 220 degrees. The method for controlling the warpage of an optical film as described in item 15 of the patent application scope, wherein the optical film is in contact with the first movable roller and the first positioning roller, and a first hug is formed on the first movable roller Angle, wherein the first holding angle ranges from 0 degrees to 220 degrees. The method for controlling the warpage of an optical film as described in item 15 of the patent application scope, wherein the first positioning roller overlaps a geometric center of the first limiting mechanism. The method for controlling the warpage of an optical film as described in item 15 of the patent application scope, wherein the warpage control device further includes a second movable roller mounted on the first limit mechanism, wherein the second movable roller The first positioning roller is used as the axis to move. The method for controlling the warpage of an optical film as described in Item 18 of the patent application range, wherein the warpage control device further includes a second limit mechanism, and the first positioning roller and the second positioning roller are fixed to the first 2. On the limit mechanism. The method for controlling the warpage of an optical film as described in item 19 of the patent application scope further includes: moving the first movable roller to an idle position, and rotating the second limit mechanism so that the optical film is not in contact with the The first positioning roller is in contact with the second positioning roller. The method for controlling the warpage of the optical film as described in item 20 of the patent application scope further includes: continuing to rotate the second limiting mechanism to make the optical film contact the first positioning roller and the second positioning roller again. The method for controlling the warpage of an optical film as described in item 20 of the scope of the patent application further includes: moving the second movable roller to the working position to bring it into contact with the optical film.

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