TWI706174B - Polarizer structure and bonding method thereof - Google Patents

Abstract

A polarizer structure includes a first polarizer plate, a second polarizer plate, a bonding member and a second protective film. Each of the first polarizer plate and the second polarizer plate includes a polarizer film and a first protective film. The polarizer film has a first surface and a second surface opposite to each other. The first protective film is disposed on the first surface of the polarizer film. The bonding member connects the first protective film of the first polarizer plate and the first protective film of the second polarizer plate. The second protective film is formed on the entire second surface of the polarizer film of the first polarizer plate and the entire second surface of the polarizer film of the second polarizer plate.

Description

Polarization structure and its joining method

The present invention relates to a polarizing structure and its joining method, and more particularly to a polarizing structure to be joined and its joining method.

The conventional polarizing plate cutting process is to cut a single continuously extending polarizing plate into several polarizing unit plates. After the single polarizer is cut, it must be replaced with a new polarizer before subsequent cutting can be performed. However, replacing a new polarizer requires some replacement man-hours. The more polarizer unit plates are cut, the more replacement man-hours are required.

The embodiment of the present invention provides a polarizing structure and a bonding method thereof, which can improve the aforementioned conventional problems.

An embodiment of the present invention provides a polarization structure. The polarizing structure includes a first polarizing plate, a second polarizing plate, a first joining member and a second protective film. The first polarizing plate and the second polarizing plate each include a polarizing film and a first protective film. The polarizing film has a first surface and a second surface opposite to each other. The first protective film is arranged on the first surface of the polarizing film. The first joining member joins the first protective film of the first polarizer and the second The first protective film of the polarizing plate, or the second surface of the polarizing film of the first polarizing plate and the second surface of the polarizing film of the second polarizing plate. The second protective film is formed on the second surface of the polarizing film of the first polarizing plate and the second surface of the polarizing film of the second polarizing plate, and straddles the junction of the first polarizing plate and the second polarizing plate.

An embodiment of the present invention provides a bonding method of a polarizing structure. The joining method includes the following steps. A first polarizing plate and a second polarizing plate are provided, wherein the first polarizing plate and the second polarizing plate each include a polarizing film and a first protective film, and each polarizing film has a first surface and a second surface opposite to each other , And each first protective film is arranged on the first surface of the corresponding polarizing film; a first joining member is used to join the first protective film of the first polarizer and the first protective film of the second polarizer, or join the first The second surface of the polarizing film of the polarizing plate and the second surface of the polarizing film of the second polarizing plate; and forming a second protective film on the second surface of the polarizing film of the first polarizing plate and the polarizing film of the second polarizing plate The second surface crosses the junction of the first polarizer and the second polarizer.

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

10: Pressing mechanism

11: The first transmission wheel

11a: The first pressing wheel

11b: The first roller

12: The second transmission wheel group

12a: The second pressing wheel

12b: second roller

100, 200, 300: Polarization structure

100’: Joint structure

110: The first polarizer

111, 121: Polarizing film

111u, 121u: first surface

111b, 121b: second surface

111e1, 111e2: the first long side

1111, 1211: the first covering layer

1112, 1212: Polarizing layer

1113, 1213: second covering layer

112, 122: the first protective film

113, 123: Adhesive layer

120: second polarizer

121e1, 121e2: second long side

130, 130’: The first joint

131, 261: Bonding layer

132, 262: Adhesive layer

140: second protective film

140s: bonding surface

150: adhesive

260: second joint

P1: protrusion

FIG. 1A is a bottom view of a polarizing structure according to an embodiment of the invention.

Fig. 1B shows a cross-sectional view of the polarizing structure of Fig. 1A along the direction 1B-1B'.

FIG. 1C is a schematic diagram showing the bending of the polarizing structure of FIG. 1A.

FIG. 2 is a cross-sectional view of a polarizing structure according to another embodiment of the invention.

FIG. 3 is a cross-sectional view of a polarizing structure according to another embodiment of the invention.

Figures 4A to 4C show the bonding process diagram of the polarizing structure of Figure 1.

Please refer to FIGS. 1A to 1C. FIG. 1A is a bottom view of the polarizing structure 100 according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of the polarizing structure 100 of FIG. 1A along the direction 1B-1B'. FIG. 1C is a schematic diagram showing the bending of the polarizing structure 100 in FIG. 1A.

As shown in FIG. 1B, the polarizing structure 100 includes a first polarizing plate 110, a second polarizing plate 120, a first bonding member 130, a second protective film 140 and an adhesive member 150. The first polarizing plate 110 includes a polarizing film 111, a first protective film 112 and an adhesive layer 113. The polarizing film 111 has a first surface 111u and a second surface 111b opposite to each other. The first protective film 112 is disposed on the first surface 111 u of the polarizing film 111. The second polarizing plate 120 includes a polarizing film 121, a first protective film 122 and an adhesive layer 123. The polarizing film 121 has a first surface 121u and a second surface 121b opposite to each other. The first protective film 122 is disposed on the first surface 121 u of the polarizing film 121. The first joining member 130 joins the first protective film 112 of the first polarizer 110 and the first protective film 122 of the second polarizer 120.

As shown in FIGS. 1A and 1B, the second protective film 140 is formed on the second surface 111b of the polarizing film 111 of the first polarizing plate 110 and the second surface 121b of the polarizing film 121 of the second polarizing plate 120 and straddles the first The junction of the polarizing plate 110 and the second polarizing plate 120 can enhance the overall strength of the polarizing structure 100. In addition, the second The protective film 140 is a continuous film. In this way, as shown in FIG. 1C, when the polarizing structure 100 is bent, the junction C1 of the first polarizing plate 110 and the second polarizing plate 120 will not form a sharp bend shape (the sharp bend shape is likely to cause the polarizing structure 100), but presents a smooth arc shape. It can be seen that the strength of the polarizing structure 100 is sufficient to resist the bending force, which can prevent the polarizing structure 100 from being easily broken.

In addition, as shown in FIGS. 1A and 1B, the two facing sides (not labeled) of the first polarizer 110 and the second polarizer 120 can be isolated from each other (if not in contact), but can also be in contact with each other.

In one embodiment, the first protective film 112 is a surface protective film, and the second protective film 140 is a release film. In another embodiment, the first protective film 112 is a release film, and the second protective film 140 is a surface protective film.

The surface protection film and the release film are used to protect the polarizing films 111 and 121 from damage or contamination during processing and transportation. When the polarizing films 111, 121 are in a situation that does not need to be protected, for example, the polarizing films 111, 121 are attached to an optical member (not shown), then one of the surface protection film or the release film can be peeled off, and then bonded through The member 150 or the adhesive layers 113 and 123 adhere the polarizing films 111 and 121 to the optical member.

In one embodiment, the first polarizer 110 and the second polarizer 120 are each a continuous coil.

Several polarizing plates (such as the first polarizing plate 110 and the second polarizing plate 120) of the embodiment of the present invention are all connected to the polarizing structure 100 for subsequent cutting processes, namely The light structure 100 has a relatively large length, and then the polarizing structure 100 is cut into a plurality of polarizing unit plates, and the polarizing unit plates can be attached to the optical member later. The number of polarizers included in the polarizing structure 100 can be two, but can also be more, such as three, four or more. Compared with cutting a single polarizing plate, the polarizing structure 100 combined with several polarizing plates can be cut into more polarizing unit plates to increase production efficiency. In addition, since several polarizing plates are all connected to form the polarizing structure 100 before cutting, the number and man-hours of changing the polarizing structure in the cutting process can be reduced. For example, the polarizing structure 100 is installed in the cutting mechanism, and/ Or the calibration of the polarizing structure 100 on the cutting mechanism, etc., and more polarizing unit plates can be cut out in a certain time, and the waste of calibration can be reduced, so as to increase production efficiency and save costs. In addition, in the present invention, the quality of the polarizing plate can be inspected before cutting (for example, during the joining process). If the quality is found to be out of compliance (such as a defect), it will not be joined to ensure that all polarizing plates after joining of the polarizing structure 100 are With qualified quality. In this way, the polarized unit plate after the cut may not require quality inspection, or the quality inspection items may be reduced to increase production efficiency.

The polarizing film 111 includes a first covering layer 1111, a polarizing layer 1112, and a second covering layer 1113. The materials of the first covering layer 1111 and the second covering layer 1113 can be thermoplastic resins with excellent transparency, mechanical strength, thermal stability, moisture barrier properties, etc., such as cellulose resins, acrylic resins, and amorphous resins. Polyolefin resins, polyester resins, polycarbonate resins, and combinations thereof, specifically may include polymethylmethacrylate (PMMA), cellulose resins means that part of the hydroxyl groups in cellulose are acetate The resin is either partly esterified with acetic acid and partly esterified with other mixed esters. Cellulose resin Preferably it is a cellulose ester resin, more preferably an acetyl cellulose resin, such as triacetyl cellulose, diacetyl cellulose, cellulose acetate propionate, cellulose acetate butyl Acid ester, etc., fully esterified cellulose is called triacetate cellulose (TAC), acrylic resin film, polyaromatic hydroxy resin film, polyether resin film, cyclic polyolefin resin film (such as polybornene resin film) ), polycarbonate resins such as polyesters formed by carbonic acid and glycol or bisphenol, such as: polyethylene terephthalate (PET), polypropylene (PP), polyethylene (polyethylene, PE), non-crystalline polyolefin resins such as cyclo olefin (co)polymers (COC/COP), consisting of norbornene, cyclopentadiene, dicyclopentane A group of ring-opening polymers such as diene and tetracyclododecene, or copolymers with olefins, polycarbonate (PC), and any combination of the above. In addition, the first protective film material can also be, for example, (meth)acrylic, urethane, acrylic urethane, epoxy, silicone, or other thermosetting resins or UV-curable resin. In addition, the first covering layer 1111 and the second covering layer 1113 may further include at least one additive. The additives can be, for example, ultraviolet absorbers, antioxidants, lubricants, plasticizers, mold release agents, anti-coloring agents, flame retardants, nucleating agents, antistatic agents, pigments, or coloring agents.

The polarizing layer 1112 can be a polyvinyl alcohol (PVA) film that absorbs and aligns dichroic pigments or is formed by liquid crystal materials doped with absorbing dye molecules. Polyvinyl alcohol can be formed by saponifying polyvinyl acetate. In some embodiments, polyvinyl acetate may be a monomer of vinyl acetate or a copolymer of vinyl acetate and other monomers. The above-mentioned other monomers may be unsaturated carboxylic acids, olefins, unsaturated sulfonic acids, vinyl ethers, and the like. In other embodiments, the polyvinyl alcohol may be modified polyvinyl alcohol, for example, polyvinyl formaldehyde, polyvinyl acetaldehyde, or polyvinyl butyral polymer (Cyclo Olefin Polymer, COP) modified by aldehydes. , Polycarbonate (PC) or any combination of the above groups.

The polarizing film 121 includes a first covering layer 1211, a polarizing layer 1212, and a second covering layer 1213. The material of the first covering layer 1211 is similar to the first covering layer 1111, the material of the second covering layer 1213 is similar to the second covering layer 1113, and the material of the polarizing layer 1112 is similar to the polarizing layer 1212, which will not be described here.

The material of the first protective film 112, 122 and the second protective film 140 can be, for example, a thermoplastic resin with excellent transparency, mechanical strength, thermal stability, and moisture barrier properties. Thermoplastic resins may include cellulose resins (for example: cellulose triacetate), acrylic resins (for example: polymethyl methacrylate), polyester resins (for example, polyethylene terephthalate, polyethylene naphthalate). Diester), olefin resin, polycarbonate resin, cycloolefin resin, oriented stretchable polypropylene, polyethylene (Polyethylene, PE), polypropylene, cycloolefin polymer, cycloolefin copolymer, or any combination of the above .

In an embodiment, the material of the first protective films 112, 122 may also be (meth)acrylic, urethane, acrylic urethane, epoxy, polysiloxane, etc. Thermosetting resin or UV-curing resin.

In one embodiment, the second protective film 140 may be, for example, a polyethylene terephthalate film coated with a release agent, such as but not limited to silicone resin.

As shown in FIG. 1A, the second surface 111b of the polarizing film 111 (not shown in FIG. 1A) of the first polarizer 110 has two opposite first long sides 111e1 and 111e2. The second surface 121b of the polarizing film 121 (not shown in FIG. 1A) of the second polarizing plate 120 has two opposite second long sides 121e1 and 121e2. The second protective film 140 continuously extends to the two first long sides 111e1, 111e2 and the two second long sides 121e1, 121e2. In other words, the second protective film 140 covers the entire second surface 111b of the polarizing film 111 of the first polarizer 110 and the entire second surface 121b of the polarizing film 121 of the second polarizer 120 to further enhance the overall strength of the polarizing structure 100 .

As shown in FIG. 1B, the adhesive layer 113 of the first polarizer 110 is formed between the polarizer film 111 and the first protective film 112, so that the first protective film 112 passes through the adhesive layer 113 to adhere the polarizer film 111. The adhesion layer 123 of the second polarizer 120 is formed between the polarizing film 121 and the first protective film 122, so that the first protective film 122 is adhered to the polarizing film 121 through the adhesion layer 123. In addition, the adhesive layer 113 and/or the adhesive layer 123 may be a pressure sensitive adhesive (PSA), the material of which includes (meth)acrylic copolymer, for example, a material that may include but is not limited to functional groups, such as ( Materials such as methyl meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate and the like.

As shown in FIG. 1B, the first joining member 130 includes a joining layer 131 and an adhesive layer 132. Before the first joining member 130 joins the first polarizing plate 110 and the second polarizing plate 120, the adhesive layer 132 may be pre-formed on the joining layer 131 to form the first joining member 130. The first joining member 130 is adhered to the first protective films 112 and 122 by the adhesive layer 132 to join the first polarizing plate 110 and the second polarizing plate 120. The material of the adhesive layer 132 is the same as or similar to the adhesive layer 113, and will not be repeated here. In one embodiment, the adhesive layer 132 may be a silicon adhesive, and the thickness may be between about 0.03 μm and about 0.06 μm.

The bonding layer 131 may be a light-transmitting layer or a non-light-transmitting layer, and the color of the non-light-transmitting layer is, for example, white, black, or other colors. The color of the non-transmissive layer can show the junction of the first polarizer 110 and the second polarizer 120, so as to quickly identify the location of the junction. In one embodiment, the thickness of the bonding layer 131 is smaller than that of the adhesion layer 132. In an embodiment, the thickness of the bonding layer 131 may be between about 0.01 μm and about 0.03 μm.

As shown in FIG. 1B, the bonding member 150 is formed between the second protective film 140 and the polarizing film 111 and between the second protective film 140 and the polarizing film 121 to bond the second protective film 140 and the polarizing films 111 and 121. In detail, the second protective film 140 is formed on the second surface 111 b of the polarizing film 111 and the second surface 121 b of the polarizing film 121 of the second polarizing plate 120 through the adhesive 150. In addition, the second protective film 140 has an adhesive surface 140s, and the adhesive 150 can cover at least a part of the adhesive surface 140s of the second protective film 140, such as the entire adhesive surface 140s. In one embodiment, the adhesive 150 is a continuous film.

As shown in FIG. 1A, the adhesive 150 can continuously extend to the two first long sides 111e1 and 111e2 of the polarizing film 111 and the two second long sides 121e1 and 121e2 of the polarizing film 121. In other words, the adhesive 150 covers the entire second surface 111 b of the polarizing film 111 of the first polarizing plate 110 and the entire second surface 121 b of the polarizing film 121 of the second polarizing plate 120. The material of the bonding element 150 is the same as or similar to the bonding layer 113, and will not be repeated here.

In summary, as shown in FIG. 1A, the top view area surrounded by the boundary of the first polarizer 110 and the second polarizer 120 and the top view area of the adhesive 150 at least partially overlap, such as completely overlap, and/or The top view area surrounded by the boundary of the first polarizer 110 and the second polarizer 120 and the top view area of the second protective film 140 at least partially overlap, such as completely overlap. In addition, the top view area of the second protective film 140 and the top view area of the adhesive 150 at least partially overlap, such as completely overlap.

Please refer to FIG. 2, which shows a cross-sectional view of a polarizing structure 200 according to another embodiment of the present invention. The polarizing structure 200 includes a first polarizing plate 110, a second polarizing plate 120, a first joining member 130, a second protective film 140, a bonding member 150 and a second joining member 260.

The polarizing structure 200 of the embodiment of the present invention has similar or the same features and technical effects as the polarizing structure 200, except that the polarizing structure 200 further includes a second joining member 260. The second bonding member 260 is bonded to the second surface 111b of the polarizing film 111 of the first polarizing plate 110 and the second surface 121b of the polarizing film 121 of the second polarizing plate 120 to join the first polarizing plate 110 and the second polarizing plate 120 , And the adhesive 150 and the second protective film 140 cover the entire second joining member 260. Since the second engaging member 260 has a thickness, the second protective film 140 and the adhesive member 150 form a protrusion P1 at a position corresponding to the second engaging member 260. In addition, the second bonding member 260 includes a bonding layer 261 and an adhesive layer 262, wherein the structures and/or materials of the bonding layer 261 and the bonding layer 262 are respectively similar or the same as the bonding layer 131 and the bonding layer 132, and will not be repeated here. In this embodiment, by providing the second engaging member 260, a better supporting force can be provided simultaneously with the first engaging member 130 on the upper and lower sides.

Please refer to FIG. 3, which shows a cross-sectional view of a polarizing structure 300 according to another embodiment of the present invention. The polarizing structure 300 includes a first polarizing plate 110, a second polarizing plate 120, a first joining member 130', a second protective film 140, and a bonding member 150.

The polarizing structure 300 of the embodiment of the present invention has similar or the same features and technical effects as the polarizing structure 100. The difference is that the first bonding member 130' of the polarizing structure 300 is bonded to the second surface of the polarizing film 111 of the first polarizing plate 110 111b and the second surface 121b of the polarizing film 121 of the second polarizer 120, and the bonding member 150 and the second protective film 140 cover the entire first bonding member 130'. Since the first engaging member 130' has a thickness, the second protective film 140 and the adhesive member 150 form a protrusion P1 at a position corresponding to the first engaging member 130'. In this embodiment, by arranging the first joining member 130' and the second protective film 140 to be subsequently attached on the same side, the working side is aligned, which facilitates the setting of the process sticking direction and the winding mechanism, so as to improve effectiveness. In addition, the first joining member 130' of this embodiment has a structure and/or material similar to or the same as the aforementioned first joining member 130, which will not be repeated here.

Please refer to FIGS. 4A to 4C, which illustrate the bonding process diagram of the polarizing structure 100 in FIG. 1.

As shown in FIG. 4A, a first polarizer 110 and a second polarizer 120 are provided. The first polarizing plate 110 includes a polarizing film 111, a first protective film 112 and an adhesive layer 113. The polarizing film 111 has a first surface 111u and a second surface 111b opposite to each other. The first protective film 112 is disposed on the first surface 111 u of the polarizing film 111. The adhesion layer 113 is formed between the polarizing film 111 and the first protective film 112 to bond the polarizing film 111 and the first protective film 112. The second polarizing plate 120 includes a polarizing film 121, a first protective film 122 and an adhesive layer 123. The polarizing film 121 has a first surface 121u and a second surface 121b opposite to each other. The first protective film 122 is disposed on the first surface 121 u of the polarizing film 121. The adhesive layer 123 is formed between the polarizing film 121 and the first protective film 122 to bond the polarizing film 121 and the first protective film 122.

As shown in Fig. 4B, the first protective film 112 of the first polarizer 110 and the first protective film 122 of the second polarizer 120 are bonded by the first bonding member 130 using a bonding machine (not shown) or manually. To join the first polarizer 110 and the second polarizer 120. The structure shown in Fig. 4B is called the bonding structure 100'. The quality of the polarizing plate can be inspected in advance before the joining process or the step in Figure 4A. If the quality is found to be out of compliance (such as defects), it will not be joined to ensure that all polarizing plates after joining of the polarizing structure 100 are of acceptable quality . In this way, in the cutting process after the step of Fig. 4C, the polarizing unit plate after the cutting may not require quality inspection, or the quality inspection items may be reduced to increase production efficiency.

Then, using the pressing mechanism 10 as shown in FIG. 4C, the adhesive 150 and the bonding structure 100' as shown in FIG. 4B are pressed to form the polarizing structure 100 as shown in FIG. 1B. As shown in FIG. 4C, in this embodiment, the adhesive 150 may be pre-coated or disposed on at least a part of the adhesive surface 140s of the second protective film 140, such as the entire adhesive surface 140s. After pressing and bonding, the second protective film 140 is bonded to the bonding structure 100' by the bonding member 150. For example, the second protective film 140 is adhered to the entire second surface 111 b of the polarizing film 111 of the first polarizing plate 110 and the entire second surface 121 b of the polarizing film 121 of the second polarizing plate 120 by the adhesive 150.

In addition, the pressing mechanism 10 includes at least a first transmission wheel set 11 and a second transmission wheel set 12, wherein the first transmission wheel set 11 is used to transmit the joint structure 100', and the second transmission wheel set 12 is used to transmit the combined The adhesive 150 and the second protective film 140. The first transmission wheel set 11 and the second transmission wheel set 12 respectively include a first pressing wheel 11a and a second pressing wheel 12a. The joint structure 100' and the combined adhesive 150 and the second protective film 140 are transmitted to the first The pressing wheel 11a and the second pressing wheel 12a are pressed by the first pressing wheel 11a and the second pressing wheel 12a to form the polarizing structure 100 as shown in FIG. 1B. In addition, the first transmission wheel set 11 and the second transmission wheel set 12 further include a first roller 11b and a second roller 12b respectively. The first roller 11b is used to transmit the joint structure 100', and the second roller 12b is used to transmit the combined structure. The adhesive 150 and the second protective film 140.

Finally, the same pressing mechanism 10 or a different mechanism can be used to transfer the polarizing structure 100 to a cutting die (not shown) to cut the polarizing structure 100 into at least one polarizing unit plate (not shown). Compared with cutting a single polarizing plate, a polarizing junction formed by connecting several polarizing plates Since the structure 100 has a larger length, more polarizing unit plates can be cut out to increase production efficiency. In addition, since several polarizers are all connected to form the polarizing structure 100 before cutting, and have a relatively large length, the number of times and/or man-hours of changing the polarizing structure in the cutting process can be reduced, for example, the polarizing structure 100 is set in the cutting mechanism and/or the calibration of the polarizing structure 100 on the cutting mechanism, etc., and can cut out more polarizing unit plates in a certain working hours (such as the same working hours), and reduce The waste of calibration to increase production efficiency and/or save costs.

In another embodiment, the adhesive 150 in Figure 4C may be pre-coated or disposed on the entire second surface 111b and the entire second surface 121b of the bonding structure 100' in Figure 4B. In this example, the first transmission wheel set 11 is used to transmit the combined joining structure 100' and the adhesive 150, and the second transmission wheel set 12 is used to transmit the second protective film 140. The second protective film 140 and the combined joining structure 100' and the adhesive 150 are transmitted between the first pressing wheel 11a and the second pressing wheel 12a, and are subjected to the first pressing wheel 11a and the second pressing wheel 12a The pressing of, can also form the polarizing structure 100 as shown in Figure 1B.

The manufacturing method of the polarizing structure 200 in FIG. 2 is similar to that of the polarizing structure 100, except that the second bonding member 260 is used to bond the second surface 111b and the second surface 121b of the bonding structure 100' in FIG. 4B to bond the second surface. A polarizing plate 110 and a second polarizing plate 120 can further strengthen the overall bonding strength of the first polarizing plate 110 and the second polarizing plate 120. The remaining manufacturing steps of the polarizing structure 200 are similar or the same as the corresponding steps of the polarizing structure 100, and will not be repeated here.

The manufacturing method of the polarizing structure 300 in FIG. 3 is similar to that of the polarizing structure 100, except that the first bonding member 130 is bonded to the second surface of the bonding structure 100' in FIG. 4B The surface 111b and the second surface 121b are used to join the first polarizer 110 and the second polarizer 120. The remaining manufacturing steps of the polarizing structure 300 are similar or the same as the corresponding steps of the polarizing structure 100, and will not be repeated here.

In summary, although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Those who have ordinary knowledge in the technical field to which the present invention belongs can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to those defined by the attached patent application scope.

100: Polarized light structure

110: The first polarizer

111, 121: Polarizing film

111u, 121u: first surface

111b, 121b: second surface

1111, 1211: the first covering layer

1112, 1212: Polarizing layer

1113, 1213: second covering layer

112, 122: the first protective film

113, 123: Adhesive layer

120: second polarizer

130: The first joint

131: Bonding layer

132: Adhesive layer

140: second protective film

140s: bonding surface

150: adhesive

Claims (15)

A polarizing structure, comprising: a first polarizing plate; a second polarizing plate, wherein the first polarizing plate and the second polarizing plate each include: a polarizing film having a first surface and a second surface opposite to each other; And a first protective film disposed on the first surface of the polarizing film; a first joining member joining the first protective film of the first polarizing plate and the first protective film of the second polarizing plate, Or join the second surface of the polarizing film of the first polarizing plate and the second surface of the polarizing film of the second polarizing plate; a second protective film and a bonding member are formed on the first polarizing plate The entire second surface of the polarizing film and the entire second surface of the polarizing film of the second polarizing plate, and straddling the junction of the first polarizing plate and the second polarizing plate, wherein the bonding member is located On the second protective film; wherein, the second protective film and the adhesive are all continuous films. The polarizing structure as described in claim 1, wherein the second surface of the polarizing film of the first polarizing plate has two opposite first long sides, and the second surface of the polarizing film of the second polarizing plate It has two relatively second long sides, and the second protective film extends to the two first long sides and the two second long sides. The polarizing structure according to claim 1, wherein the first joining member joins the first protective film of the first polarizing plate and the first protective film of the second polarizing plate; the polarizing structure further includes: A second joining member joining the second surface of the polarizing film of the first polarizing plate and the second surface of the polarizing film of the second polarizing plate; wherein the second protective film covers the entire second joining Pieces. In the polarizing structure described in item 3 of the scope of patent application, the second protective film forms a protrusion corresponding to the position of the second joining member. The polarizing structure described in claim 1, wherein the first joining member joins the second surface of the polarizing film of the first polarizing plate and the second surface of the polarizing film of the second polarizing plate, The second protective film covers the entire first joining member. In the polarizing structure described in item 5 of the scope of patent application, the second protective film forms a protrusion corresponding to the position of the first joining member. As described in the first item of the scope of patent application, the first protective film is one of a surface protective film and a release film, and the second protective film is a combination of the surface protective film and the release film The other. According to the polarizing structure described in item 1 of the scope of patent application, the first polarizing plate and the second polarizing plate are each a continuous coil. The polarizing structure described in claim 1, wherein the first bonding member includes a bonding layer and an adhesive layer, the bonding layer is preformed on the bonding layer, and the thickness of the bonding layer is smaller than that of the bonding layer thickness. A method of joining a polarizing structure includes: providing a first polarizing plate and a second polarizing plate, wherein the first polarizing plate and the second polarizing plate each include a polarizing film and a first protective film, each of the polarizing films With relative A first surface and a second surface, and each of the first protective films is disposed on the first surface of the corresponding polarizing film; a first joining member is used to join the first protective film of the first polarizing plate Film and the first protective film of the second polarizing plate, or bonding the second surface of the polarizing film of the first polarizing plate and the second surface of the polarizing film of the second polarizing plate; and forming a first Two protective films and an adhesive are on the entire second surface of the polarizing film of the first polarizing plate and the entire second surface of the polarizing film of the second polarizing plate and straddling the first polarizing plate and the At the junction of the second polarizer, the adhesive member is located on the second protective film, and both the second protective film and the adhesive member are continuous films. The bonding method described in claim 10, wherein the second surface of the polarizing film of the first polarizing plate has two first long sides opposite to each other, and the second surface of the polarizing film of the second polarizing plate There are two relatively second long sides; in the step of forming the second protective film, the second protective film extends to the two first long sides and the two second long sides. The bonding method according to claim 10, wherein in the step of bonding with the first bonding member, the first bonding member is bonded to the first protective film of the first polarizing plate and the second polarizing plate The first protective film; the polarizing structure further includes: using a second joining member to join the second surface of the polarizing film of the first polarizing plate and the second surface of the polarizing film of the second polarizing plate; Wherein, in the step of forming the second protective film, the second protective film covers the entire second joining member. According to the bonding method described in claim 12, in the step of forming the second protection film, the second protection film forms a protrusion corresponding to the position of the second bonding member. The bonding method according to claim 10, wherein in the step of bonding with the first bonding member, the first bonding member is bonded to the second surface of the polarizing film of the first polarizer and the second The second surface of the polarizing film of the polarizing plate; wherein, in the step of forming the second protective film, the second protective film covers the entire first joining member. According to the joining method described in claim 14, wherein in the step of forming the second protective film, the second protective film forms a protrusion corresponding to the position of the second joining member.

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