TWI784267B - Cutting tool, optical sheet, optical device, and method for manufacturing the same - Google Patents

Abstract

A cutting tool, an optical sheet, an optical device, and a method for manufacturing the same are provided. The optical sheet includes a main-sheet portion and a sub-sheet portion. Each of the main-sheet portion and the sub-sheet portion includes a polarizing film, a first material film and a second material film. The polarizing film has a first polarizing surface and a second polarizing surface opposing to the first polarizing surface. The polarizing films of the main-sheet portion and the sub-sheet portion are separated from each other. The first material film is on the first polarizing surface. The first material films of the main-sheet portion and the sub-sheet portion are connected with each other. The second material film is on the second polarizing surface. The second material films of the main-sheet portion and sub-sheet portion are separated from each other.

Description

Cutting mechanism, optical film, optical device and manufacturing method thereof Law

The invention relates to a cutting mechanism, an optical film, an optical device and a manufacturing method thereof.

Polarizing film is an optical component widely used in displays. As displays become more and more widely used, such as mobile phones and wearable devices, the quality requirements for polarizing films are also getting higher and higher. After the polarizing film is made, it is usually attached to displays of various sizes with a surface protection film and then the surface protection film is removed. Therefore, the industry is committed to improving the peeling yield of the surface protection film.

The invention relates to a cutting mechanism, an optical film, an optical device and a manufacturing method thereof.

According to one aspect of the present invention, a cutting mechanism is provided, which is used for cutting an optical film and includes a cutter body. The cutter body includes a main cutter part and a secondary cutter part. The main knife portion and the secondary knife portion have a non-shared first cutting edge. The main knife portion and the secondary knife portion have a common second cutting edge. The first cutting edge and the second cutting edge are at different positions in the first direction.

According to another aspect of the present invention, an optical film is provided, which includes a main film portion and a secondary film portion. Each of the main film part and the secondary film part includes a polarizing film, a first material film and a second material film. The polarizing film has a first polarizing film surface and a second polarizing film surface facing each other. The polarizing films of the main film portion and the secondary film portion are disconnected from each other. The first material film is on the surface of the first polarizing film. The first material film of the main film part and the secondary film part is connected. The second material film is on the surface of the second polarizing film. The second material films of the main film portion and the secondary film portion are disconnected from each other.

According to yet another aspect of the present invention, a method for manufacturing an optical device is provided, which includes the following steps. An optical film is provided. The optical film includes a main film part and a secondary film part. Each of the main film part and the secondary film part includes a polarizing film, a first material film and a second material film. The polarizing film has a first polarizing film surface and a second polarizing film surface facing each other. The polarizing films of the main film portion and the secondary film portion are disconnected from each other. The first material film is on the surface of the first polarizing film. The first material film of the main film part and the secondary film part is connected. The second material film is on the surface of the second polarizing film. The second material films of the main film portion and the secondary film portion are disconnected from each other. A first peeling step is performed on the optical film to obtain an optical patch. The first tearing step includes tearing off the second material film of the main film part, or the first tearing step includes tearing off the first material film of the main film part while tearing off the secondary film part. The attaching step includes attaching the optical patch to an optical substrate.

According to still another aspect of the present invention, an optical device is provided, which includes an optical patch. The optical patch includes a main film part and a secondary film part. Each of the main film part and the secondary film part includes a polarizing film and a first material film. The polarizing film has a first polarizing film surface and a second polarizing film surface facing each other. The polarizing films of the main film portion and the secondary film portion are disconnected from each other. The first material film is on the surface of the first polarizing film. The first material film of the main film part and the secondary film part is connected. The secondary film portion further includes a second material film on the surface of the second polarizing film of the secondary film portion.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific examples are given in detail with the accompanying drawings as follows:

100,100A,100B,100C: cutter body

202, 4202, 5202: first cutting edge

201: Non-cutting edge

203: Second cutting edge

406: Main knife department

508: Second knife department

550: Optical film material

652: Polarizing film

652S1: The surface of the first polarizing film

652S2: Second polarizing film surface

754: The first material film

856: second material film

960: Optical substrate

960A: display area

960P: non-display area

962: Tape

1202: The first cutting line

1304: Second cutting line

2550: Optical film

2570: Main film part

2580: sub-membrane

2580S: side

3590: Optical patch

6590: Optical patch

8550: Optical film

D1: the first direction

D2: Second direction

D3: Third direction

L: distance

G: Length

1A to 6 illustrate the manufacturing method of the optical device of the first embodiment.

7 to 8 illustrate the manufacturing method of the optical device of the second embodiment.

Fig. 9 shows a top view of an optical device of an embodiment.

The following is an illustration with some embodiments. It should be noted that this disclosure does not show all possible embodiments, and other implementations not mentioned in this disclosure may also be applicable. Furthermore, the size ratios in the drawings are not drawn to the same proportions as the actual products. Therefore, the contents of the specification and drawings are only used to describe the embodiments, rather than to limit the protection scope of the present disclosure. Additionally, implement The descriptions in the example, such as detailed structure, process steps and material application, etc., are only for illustration purposes, and are not intended to limit the scope of protection of the present disclosure. The details of the steps and structures of the embodiments can be changed and modified according to the needs of the actual application process without departing from the spirit and scope of the present disclosure. The same/similar symbols are used to represent the same/similar components in the following description.

1A to 6 illustrate the manufacturing method of the optical device of the first embodiment.

FIG. 1A shows a cutting process diagram of the cutting mechanism 71 cutting the optical film material 550 . FIG. 1B shows a top view of the cutter body 100 and the optical film material 550 of the cutting mechanism 71 in FIG. 1A .

Please refer to FIG. 1A , the cutting mechanism 71 includes a discharging mechanism 110 , a conveying mechanism 120 , a controller 130 and a cutting tool 73 . The unwinding mechanism 110 includes a winding wheel 111 . The optical film material 550 can be wound on the winding wheel 111 . In one embodiment, the unwinding mechanism 110 may further include two paired first nip rolls 112, the first nip rolls 112 are adjacent to the take-up wheel 111, and the first nip rolls 112 can fix or release the optical film The material 550 is used to control the advancing length of the optical film material 550 . In another embodiment, the optical film material 550 can also be sent out from below the winding wheel 111 (as shown by the dotted line in FIG. 1A ). The transmission mechanism 120 can continue to operate, so that when the discharge mechanism 110 releases the optical film material 550, the optical film material 550 above the transmission mechanism 120 is driven by the transmission mechanism 120 to advance in the transmission direction S1 until the discharge mechanism 110 is fixed. Optical film material 550. The conveying mechanism 120 is, for example, a belt conveying mechanism, but the embodiment of the present invention is not limited thereto. In one embodiment, The speed at which the conveying mechanism 120 conveys the subsequently cut optical film 2550 may be different from the speed at which the unwinding mechanism 110 conveys the optical film 550 . The cutting tool 73 is located above the optical film material 550 and can cut the optical film material 550 downward. The cutting tool 73 includes a punch 141 , a carrier 142 and a tool body 100 . The bearing part 142 is assembled on the punch 141 to move up and down with the punch 141 . In addition, the material of the carrier 142 is, for example, wood, plastic, metal or other suitable materials.

Please refer to FIG. 1A and FIG. 1B , the cutter body 100 can be assembled on the carrier 142 . In one embodiment, the non-cutting edge 201 of the cutter body 100 can be fixed to the carrier 142 to facilitate and control the cutting step.

Please refer to FIG. 1A and FIG. 1B, in the method of cutting the optical film material 550 with the cutting mechanism 71, the feeding mechanism 110 releases the optical film material 550, so that the transmission mechanism 120 can drive the optical film material 550 on it to go The conveying direction S1 advances until the optical film material 550 is located below the cutter body 100 of the cutting tool 73 , and the unwinding mechanism 110 fixes the optical film material 550 . Next, the cutting tool 73 moves toward the first direction D1 (for example, the cutting direction) to cut the optical film material 550 to obtain the optical film 2550 .

Please refer to FIG. 1B , the cutter body 100 includes a main cutter portion 406 and a secondary cutter portion 508 ; wherein, the primary cutter portion 406 and the secondary cutter portion 508 are connected to each other.

In one embodiment, the length of the main knife portion 406 in the second direction D2 is greater than or equal to the length of the secondary knife portion 508 in the second direction D2; in one embodiment, the main knife portion 406 may have the largest surrounding area. The secondary knife portion 508 may have a smaller surrounding area. The first direction D1, the second direction D2 and the third direction D3 can be compared perpendicular to each other.

The main blade portion 406 and the secondary blade portion 508 respectively have a non-shared first cutting edge 202 . The first cutting edge 202 includes a first cutting edge 4202 of the main knife portion 406 and a first cutting edge 5202 of the secondary knife portion 508 . The primary blade portion 406 and the secondary blade portion 508 have a common second cutting edge 203 . In one embodiment, the main knife portion 406 and the secondary knife portion 508 are connected to each other through the common second cutting edge 203 .

In one embodiment, the second cutting edge 203 shared by the main knife portion 406 and the secondary knife portion 508 is located above the third direction D3. In one embodiment, the second cutting edge 203 is located above any position in the third direction D3 , for example, located above one of the corners of the main knife portion 406 .

In one embodiment, the second cutting edge 203 of the cutter body 100 is connected between two parts of the first cutting edge 4202 of the main cutter portion 406 . The part of the second cutting edge 203 of the connected cutter body 100 and the two parts of the first cutting edge 4202 of the main knife part 406 may be located on the same side of the main knife part 406, for example, in the middle of the main knife part 406 having a quadrangular shape. On one side, the connected portion of the cutter body 100 with the second cutting edge 203 and the portion of the main cutter portion 406 with the first cutting edge 4202 may be parallel to the third direction D3. In one embodiment, the length of the second cutting edge 203 of the cutter body 100 in the third direction D3 is less than or equal to the length of the first cutting edge 4202 of the main cutter portion 406 in the third direction D3.

The first cutting edge 202 and the second cutting edge 203 are located at different positions in the first direction D1 (eg, Z direction). The first cutting edge 4202 of the main knife portion 406 of the first cutting edge 202 and the first cutting edge of the secondary knife portion 508 5202 is at the same position in the first direction D1.

In one embodiment, the distance between the first cutting edge 202 and the non-cutting edge 201 in the first direction D1 may be greater than the distance between the second cutting edge 203 and the non-cutting edge 201 in the first direction D1.

In one embodiment, the optical film material 550 before being cut by the cutting mechanism can be an optical film roll or a re-cuttable original optical film sheet. The optical film material 550 includes a polarizing film 652 , a first material film 754 and a second material film 856 . The polarizing film 652 has a first polarizing film surface 652S1 and a second polarizing film surface 652S2 opposite to each other. The first material film 754 is on the first polarizing film surface 652S1. The second material film 856 is on the second polarizing film surface 652S2. One of the first material film 754 and the second material film 856 is a surface protection film. The other of the first material film 754 and the second material film 856 is a release film. The first material film 754 and the second material film 856 are adhered to the first polarizing film surface 652S1 and the second polarizing film surface 652S2 of the polarizing film 652 via an adhesive layer (not shown).

The polarizing film 652 may be formed of a polyvinyl alcohol (Polyvinyl Alcohol, PVA) film. The material of the polyvinyl alcohol-based film can be, for example, polyvinyl alcohol or its derivatives. Derivatives of polyvinyl alcohol include not only polyvinyl formaldehyde, polyvinyl acetal, etc., but also olefins such as ethylene and propylene, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid, or their alkyl esters. , Acrylamide and other modified persons. In one embodiment, a protective layer (not shown) may be disposed on at least one side of the polarizing film 652 . The protective layer can be a single-layer or multi-layer structure. The material of the protective layer can include cellulose resin, acrylic resin, polyester resin, olefin resin, polycarbonate Ester resin, cycloolefin resin, directional stretch polypropylene, polyethylene, polypropylene, cycloolefin polymer, cycloolefin copolymer, or any combination of the above.

The first material film 754 and the second material film 856 can be a single-layer or multi-layer structure respectively, and its materials can include cellulose resin, acrylic resin, polyester resin, olefin resin, polycarbonate resin, cycloolefin resin, oriented Extensible polypropylene, polyethylene, polypropylene, cycloolefin polymer, cycloolefin copolymer or any combination of the above.

In one embodiment, the cutting edge (comprising the first cutting edge 202 and the second cutting edge 203) of the cutter body 100 is directed towards the second material film 856 of the optical film material 550, from the film surface of the second material film 856 Step 856S is to perform a punching and cutting step toward the first material film 754 downward along the first direction D1. During the cutting step, the first cutting edge edge 202 first contacts the film surface 856S of the second material film 856, thereby cutting out the first cutting line 1202 (indicated by a thick dashed line) in the optical film material 550, and because the first cutting edge The edge 202 forms a closed area, so the first cutting line 1202 formed by the first cutting edge 202 is a closed cutting line; meanwhile, during the cutting step, the second cutting edge 203 contacts the edge of the second material film 856. The film surface 856S, thereby cutting out the second cutting line 1304 (indicated by a thin dashed line) on the optical film material 550 . The second cutting line 1304 is located in an area within the closed distribution of the first cutting line 1202 , and the second cutting line 1304 is connected to the first cutting line 1202 . Thus, an optical film 2550 as shown in FIG. 3 is formed, wherein the optical film 2550 is an optical sheet product that can be used for attaching a display panel (not shown).

Wherein, the first cutting edge 202 (or the first cutting line 1202) is used By cutting all the thicknesses of the optical film material 550 , all of the first material film 754 of the bottom layer can be cut off, that is, an optical film sheet 2550 product is cut from the optical film material 550 .

The second cutting edge 203 (or the second cutting line 1304) is used to cut part of the thickness of the optical film material 550. For example, in this embodiment, the first material film 754 will not be completely cut off, so that the first material film 754 is The uncut part has a film continuous property, and connects the main film part 2570 and the secondary film part 2580 of the optical film 2550 .

In another embodiment, the second cutting edge 203 (or the second cutting line 1304) may reach part of the thickness of the first material film 754, but not cut to the full thickness of the first material film 754, so that the second A material film 754 has a film continuous property through the uncut portion, and connects the main film portion 2570 and the secondary film portion 2580 of the optical film 2550 .

Please refer to FIG. 1A , and then, after the cutting tool 73 moves upward and leaves the optical film material 550, the discharge mechanism 110 releases the optical film material 550, so that the transmission mechanism 120 drives the optical film material 550 to continue to advance in the conveying direction S1, Until the uncut part of the optical film material 550 is located below the cutter body 100 of the cutting tool 73, the unwinding mechanism 110 fixes the optical film material 550, and then repeatedly cuts the uncut part of the optical film material 550 cut steps. In this way, the optical film material 550 is cut more times to obtain a large number of optical film sheets 2550 with a higher yield.

In other embodiments, the cutter body 100 of the cutting tool 73 can be It is replaced by a blade-arranged blade body. For example, the cutting tool 73 can use the cutter body 100A shown in FIG. 2A, or the cutter body 100B shown in FIG. 2B, by which multiple optical films can be cut out simultaneously in a single cutting step. 2550. In Fig. 2A and Fig. 2B, the portion of the cutter body having the first cutting edge 202 is indicated by a solid line, and the portion of the cutter body having the second cutting edge 203 is indicated by a dashed line.

In another embodiment, the cutting tool 73 can use a cutter body 100C as shown in FIG. 2C, which differs from the cutter body 100 shown in FIG. 1B in that the main cutter portion 406 of the cutter body 100C is an open cutter The membrane has an open opening, for example, the main knife portion 406 has a ㄇ-shaped blade arrangement, and the open opening is a ㄇ-shaped opening.

Referring to FIG. 3 , the optical film 2550 includes a main film portion 2570 and a secondary film portion 2580 . The main film part 2570 and the secondary film part 2580 are defined by the polarizing film 652 separated from each other on the first material film 754. The part corresponding to the polarizing film 652 with the largest area is the main film part 2570, and the rest of the polarizing film 652 is the secondary film part 2580. . Please refer to FIG. 1B and FIG. 3 , wherein the main film part 2570 can be defined by the main knife part 406 , and the secondary film part 2580 can be defined by the secondary knife part 508 . The cutting side surface of the main film part 2570 is formed by the first cutting edge 4202 and the second cutting edge 203 of the main knife part 406 . The cutting side surface of the secondary film portion 2580 is formed by the first cutting edge 5202 and the second cutting edge 203 of the secondary knife portion 508 . The main film part 2570 and the secondary film part 2580 each include a polarizing film 652 , a first material film 754 and a second material film 856 . The polarizing film 652 and the second material film 856 of the main film part 2570 and the secondary film part 2580 are disconnected from each other, the first material film 754 of the main film part 2570 and the secondary film part 2580 is connected, that is, the main film part 2570 and the secondary film part 2580 of the optical film 2550 are connected to each other by the first material film 754 .

In one embodiment, as shown in FIG. 4, the optical film 2550 of the present invention can be bonded to a display panel (not shown), and the bonding step can include a first tearing step. In the removing step, the second material film 856 of the main film part 2570 can be torn off first, so as to obtain the optical patch 3590 as shown in FIG. 4 .

In one embodiment, the optical patch 3590 includes the polarizing film 652 and the first material film 754 on the main film portion 2570 and the secondary film portion 2580 , and the second material film 856 only on the secondary film portion 2580 . In this embodiment, the first material film 754 is a surface protection film, and the second material film 856 is a release film. The thickness of the polarizing film 652 may be 80-100 μm, such as 82 μm, or 92 μm, or 97 μm. The thickness of the first material film 754 (surface protection film) may be 0.5 to 1 times the thickness of the polarizing film 652 . The thickness of the first material film 754 (surface protection film) may be 80-100 μm, such as 90 μm or 95 μm. Because the thickness of the polarizing film 652 is relatively thin, if the thickness of the first material film 754 (surface protection film) is too thick, the problem of warping of the polarizing film 652 may easily occur. If the thickness of the first material film 754 (surface protection film) is too thin, there will be a problem that the first material film 754 (surface protection film) is not easily attached to the polarizing film 652 through the adhesive layer. The thickness of the second material film 856 (release film) may be 35-40 μm, for example, 38 μm. The overall thickness of the first material film 754 (surface protection film), the polarizing film 652 and the second material film 856 (release film) may be between 205 μm and 230 μm, for example, 210 μm.

Please refer to Figure 5A and Figure 5B. FIG. 5A shows a top view of an optical device in one embodiment. FIG. 5B shows a cross-sectional view of the optical device along the section line EF in FIG. 5A. In one embodiment, the second polarizing film surface 652S2 of the polarizing film 652 of the main film portion 2570 of the optical patch 3590 can be attached to the optical substrate 960 . In one embodiment, the optical substrate 960 is used as a substrate of a display panel, such as a transparent glass substrate or a flexible substrate, and includes a display area 960A and a non-display area 960P. In one embodiment, the optical substrate 960 can be a TFT substrate, a color filter substrate or an OLED substrate.

In one embodiment, the main film portion 2570 corresponds to the display area 960A. The secondary film portion 2580 highlights the display area 960A, and can overlap the non-display area 960P outside the display area 960A. In one embodiment, the main film portion 2570 corresponds to the display area 960A. The secondary film portion 2580 protrudes from the display area 960A, overlaps the non-display area 960P outside the display area 960A, and protrudes from the optical substrate 960 .

In one embodiment, the distance L between the side 2580S of the secondary membrane portion 2580 and the highlighted region 960A in a direction (eg, the second direction D2 ) is between 0.5 cm˜5 cm. In one embodiment, the distance L is at least 0.5 cm, which can facilitate the smooth grasping and removal of the secondary film portion 2580 in the subsequent second tearing step. In addition, the size of the secondary film part 2580 beyond the display area 960A can be controlled within an upper limit (for example, it can be less than 5 cm), which can improve the problem that the secondary film part 2580 is too long during the bonding process of the polarizing film 652 of the main film part 2570. cause interference. Please refer to FIG. 5B again. When the optical patch 3590 is attached to the optical substrate 960, in one embodiment, the second material film 856 of the secondary film part 2580 is not torn off, so The second material film 856 of the sub-film part 2580 is between the optical substrate 960 and the polarizing film 652 of the sub-film part 2580, that is, the adhesive layer (not shown) is not exposed, and the second material film of the sub-film part 2580 of the optical patch 3590 There is no adhesion between the material film 856 (for example, a release film) and the optical substrate 960 , which can prevent the secondary film portion 2580 from contaminating the optical substrate 960 .

Please refer to FIG. 6. In one embodiment, a second tearing step may be included. In the second tearing step, an operator or a grabbing device, such as a robot arm, can remove the film from the secondary film portion 2580 of the optical patch 3590. Grab, and connect the first material film 754 of the secondary film part 2580 with the first material film 754 of the main film part 2570, when the secondary film part 2580 is torn off, the first part of the main film part 2570 The material film 754 is peeled off from the polarizing film 652 of the main film portion 2570 , leaving the polarizing film 652 of the main film portion 2570 covering the display area 960A of the optical substrate 960 .

Please refer to FIG. 5B again. In one embodiment, the main film portion 2570 and the secondary film portion 2580 bonded on the optical substrate 960 have a height difference caused by the second material film 856. This height difference can make the main film portion The first material film 754 connected with the secondary film part 2580 and the polarizing film 652 of the main film part 2570 are pre-separated before tearing off, and the length G of the pre-separation in the second direction D2 can be, for example, between 1 and 2 mm. , and the difficulty of tearing off the first material film 754 connecting the main film portion 2570 and the secondary film portion 2580 can be reduced by grabbing the secondary film portion 2580 with a higher height. The length G of the first polarizing film surface 652S1 of the polarizing film 652 of the main film part 2570 and the first material film 754 of the main film part 2570 are separated from each other before being torn off. The length of the distance in the second direction D2. In one embodiment, at least 1/2 of the thickness of the first material film 754 is not cut, so as to avoid the situation that the first material film 754 is broken during the tearing process and the tearing cannot be completed.

In addition, the second tearing step does not need to attach a peeling tape to the surface of the first material film 754 , so that the production cost caused by the tape can be avoided and the production cost can be reduced.

Figures 7 to 8 illustrate the manufacturing method of the optical device of the second embodiment, wherein the difference between the first embodiment and the second embodiment lies in the differences in the first tearing step, the bonding step and the second tearing step . In this embodiment, the first material film 754 is a release film, and the second material film 856 is a surface protection film. The first tearing step can be changed to tearing off the first material film 754 of the optical film 2550 in FIG. 3 . In the process of tearing off the first material film 754, the first polarizing film surface 652S1 of the polarizing film 652 faces down first, and then the operator or grabbing device, such as a mechanical arm, grabs the secondary film portion 2580 of the optical film 2550 And tear it off, because the first material film 754 of the secondary film portion 2580 is connected to the first material film 754 of the main film portion 2570, so the first material film of the main film portion 2570 can be taken together when the secondary film portion 2580 is torn off. 754 is torn off from the polarizing film 652 of the main film portion 2570 to obtain an optical patch 6590 as shown in FIG. 7 . It should be noted that, in the embodiment where the first material film 754 is torn off in the first tearing step, the surface 652S1 of the first polarizing film faces downward, and the secondary film part 2580 can make the second film part 2570 of the main film part 2570 due to the action of gravity. A material film 754 is separated from the polarizing film 652 of the main film portion 2570 before being torn off, thereby reducing the difficulty of tearing off. In one embodiment, pre-separated in the second The distance in the direction D2 may be between 1 mm and 2 mm.

Referring to FIG. 7 , the optical patch 6590 includes the polarizing film 652 of the main film part 2570 and the second material film 856 . In one embodiment, the attaching step includes attaching the first polarizing film surface 652S1 of the polarizing film 652 of the optical patch 6590 to the display area 960A of the optical substrate 960 .

In one embodiment, the thickness of the second material film 856 (surface protection film) may be 50-60 μm, for example, 55 μm. The thickness of the polarizing film 652 may be 80-100 μm, such as 82 μm, or 92 μm, or 97 μm. The thickness of the first material film 754 (release film) may be 0.5-1 times the thickness of the polarizing film 652 . The thickness of the first material film 754 (release film) may be 80-100 μm, for example, 90 μm. If the thickness of the first material film 754 (release film) is too thick, it may easily cause warpage of the polarizing film 652 . If the thickness of the first material film 754 (release film) is too thin, there will be a problem that the first material film 754 (release film) is not easy to adhere to the polarizing film 652 through the adhesive layer. The overall thickness of the second material film 856 (surface protection film), the polarizing film 652 and the first material film 754 (release film) may be between 205 μm and 230 μm, for example, 227 μm. But the present disclosure is not limited thereto.

Please refer to FIG. 8 , in one embodiment, the second peeling step may instead include sticking the peeling tape 962 on the second material film 856 of the optical sticker 6590 . An operator or a grabbing device, such as a robotic arm, can tear off the second material film 856 from the polarizing film 652 by tearing off the adhesive tape 962 , leaving the polarizing film 652 covering the display area 960A of the optical substrate 960 .

This disclosure is not limited to the cutting machine shown in Figure 1A and Figure 1B structure and the optical film 2550 in Figure 3 obtained by cutting it. The cutting mechanism shown in FIG. 1B can use other kinds of cutter body, for example, the cutter body can have multiple secondary cutter parts 508 arranged at different positions of a main cutter part 406 . The cutting mechanism can be used to cut the optical film 550 to obtain an optical film 8550 as shown in FIG. 9 , including four secondary film parts 2580 at different positions of the main film part 2570 . The number and arrangement positions of the secondary knife part 508 and the secondary film part 2580 are not limited to those shown in the figure, and can be adjusted arbitrarily according to actual needs. For example, the position of the secondary film part 2580 can be determined according to the hand condition of the film tearing.

In one embodiment, the arrangement of the main knife portion 406 and the main film portion 2570 can be determined by the display area 960A of the optical substrate 960 . For example, the main film portion 2570 is not limited to a rectangular shape, but may have a circular shape, an oval shape, a wine barrel shape, other polygonal shapes, or other possible configurations of the display area 960A.

The present disclosure is not limited to cutting the optical film material 550 by using the cutting mechanism of the cutter body. In another embodiment, the cutting mechanism can be a laser cutting mechanism, and the optical film is obtained by controlling the laser cutting depth of the main film part and the secondary film part on the optical film material 550 . For example, the first cutting line 1202 of the optical film 2550 shown in Figure 3 is caused by a deeper laser cutting depth, while the second cutting line 1304 of the optical film 2550 is caused by a shallower laser cutting depth. cause.

To sum up, although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field of the present invention can make various changes without departing from the spirit and scope of the present invention with retouching. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

652: Polarizing film

652S2: Second polarizing film surface

754: The first material film

856: second material film

960: Optical substrate

960A: display area

960P: non-display area

2570: Main film part

2580: sub-membrane

3590: Optical patch

D1: the first direction

D2: Second direction

Claims (10)

An optical film, comprising a main film part and a primary film part, each of the main film part and the secondary film part includes: a polarizing film, with a first polarizing film surface and a second polarizing film surface opposite, wherein the The polarizing films of the main film part and the secondary film part are disconnected from each other; a first material film, on the surface of the first polarizing film, wherein the first material films of the main film part and the secondary film part are connected; and a second material film, on the surface of the second polarizing film, wherein the second material films of the main film portion and the secondary film portion are disconnected from each other. The optical film according to claim 1, wherein one of the first material film and the second material film is a surface protection film, and the other of the first material film and the second material film is a release film . A method of manufacturing an optical device, comprising: providing the optical film as described in Claim 1; performing a first tearing step on the optical film to obtain an optical patch, the first tearing step comprising the main The second material film on the surface of the second polarizing film of the film part is torn off; a bonding step is carried out, including bonding the optical patch to an optical substrate, and the side of the secondary film part is in a transverse direction Protruding from the side of the optical substrate; and performing a second tearing step, including tearing off the secondary film part of the optical patch together with the first material film on the surface of the first polarizing film of the main film part tear off. The manufacturing method of an optical device as claimed in item 3, wherein the optical substrate includes a display area and a non-display area, the main film portion corresponds to the display area, and the secondary film portion protrudes from the display area in the lateral direction The distance between them is 0.5cm~5cm. The manufacturing method of an optical device as described in claim 3, wherein the optical patch obtained in the first tearing step includes the polarizing films and the first material films and the For the second material film located only in the secondary film portion, the first material film is a surface protection film, and the second material film is a release film. The method for manufacturing an optical device as described in claim 3 further includes: providing an optical film; and cutting the optical film by a cutting mechanism to obtain the optical film as described in claim 1, wherein the The cutting mechanism includes: a knife body, including a main knife portion and a primary knife portion, the main knife portion and the secondary knife portion have a non-shared first cutting edge, and the main knife portion and the secondary knife portion have a shared second The cutting edge, wherein the first cutting edge and the second cutting edge are not coplanar at all and are located at different positions in a first direction. The manufacturing method of an optical device as claimed in claim 6, wherein the main knife portion of the cutting mechanism has the largest surrounding area, and the secondary knife portion has a smaller surrounding area; and/or the main knife portion and the secondary knife portion are connected to each other by the common second cutting edge; and/or the second cutting edge of the main knife portion is between two parts connecting the first cutting edge of the main knife portion. An optical device, comprising an optical patch, the optical patch includes a main film part and a primary film part, the main film part and the secondary film part each include: a polarizing film, with a first polarizing film surface opposite to A second polarizing film surface, wherein the polarizing films of the main film part and the secondary film part are disconnected from each other; a first material film, on the first polarizing film surface, wherein the main film part and the secondary film part The first material films of the film portion are connected; and an optical substrate, wherein the secondary film portion further includes a second material film, on the surface of the second polarizing film of the secondary film portion, wherein the main film portion The surface of the second polarizing film is attached to the optical substrate, and the second material film of the secondary film part is between the optical substrate and the polarizing film of the secondary film part. The optical device according to claim 8, wherein the optical substrate includes a display area and a non-display area, the main film part corresponds to the display area, and the distance of the secondary film part protruding from the display area in one direction is 0.5 cm ~5cm. The optical device according to claim 8, wherein the first material film of the main film part and the polarizing film of the main film part have a pre-separated length in one direction, and the length is 1-2 mm.

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