TW202008014A - 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

Polarized light structure and its joining method

The present invention relates to a polarizing structure and a bonding method thereof, and in particular to a bonded polarizing structure and a bonding method thereof.

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

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

An embodiment of the invention provides a polarizing structure. The polarizing structure includes a first polarizing plate, a second polarizing plate, a first bonding 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 disposed on the first surface of the polarizing film. The first joining member joins the first protective film of the first polarizing plate and the first protective film of the second polarizing plate, or 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 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 crosses the junction of the first polarizing plate and the second polarizing plate.

An embodiment of the 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 each of the first polarizing plate and the second polarizing plate includes 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 provided on the first surface of the corresponding polarizing film; a first bonding member is used to bond the first protective film of the first polarizing plate and the first protective film of the second polarizing plate, or to bond 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 examples are specifically described in conjunction with the accompanying drawings as follows:

Please refer to FIGS. 1A to 1C, FIG. 1A illustrates a bottom view of the polarizing structure 100 according to an embodiment of the present invention, FIG. 1B illustrates a cross-sectional view of the polarizing structure 100 of FIG. 1A along the direction 1B-1B′, and the first 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 opposing first and second surfaces 111u and 111b. The first protective film 112 is disposed on the first surface 111u 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 opposing first surface 121u and second surface 121b. The first protective film 122 is disposed on the first surface 121u of the polarizing film 121. The first bonding member 130 bonds the first protective film 112 of the first polarizing plate 110 and the first protective film 122 of the second polarizing plate 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 spans 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 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 does not form a sharp bent shape (a sharp bent shape is likely to cause a polarized structure 100 breakage), but presents a smooth arc, it can be seen that the strength of the polarizing structure 100 is sufficient to resist the bending force, so that the polarizing structure 100 can be easily broken.

In addition, as shown in FIGS. 1A and 1B, the two side surfaces (not marked) of the first polarizing plate 110 and the second polarizing plate 120 facing each other may be isolated (if not in contact), but may 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 and 121 do not need to be protected, for example, the polarizing films 111 and 121 are attached to an optical member (not shown), one of the surface protective film or the release film can be peeled off, and then passed through the bonding 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 roll.

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 process, that is, the polarizing structure 100 has a larger length, and then polarizing The structure 100 is cut into several polarizing unit plates, and the polarizing unit plates can be attached to the optical component later. The number of polarizing plates included in the polarizing structure 100 may be two, but there may be more, such as three, four or more. Compared with cutting a single polarizing plate, the polarizing structure 100 combined with a plurality of polarizing plates can be cut out with more polarizing unit plates to increase production efficiency. In addition, since several polarizing plates have been connected to the polarizing structure 100 before cutting, the number and working hours of replacing the polarizing structure in the cutting process can be reduced. For example, the polarizing structure 100 is provided in the cutting mechanism, and/or Or the man-hours such as the calibration of the polarizing structure 100 on the cutting mechanism, and in a certain man-hour, more polarizing unit plates can be cut out, and the waste of calibration can be reduced, so as to increase production efficiency and save costs. In addition, the present invention can check the quality of the polarizing plate before cutting (for example, in the bonding process). If the quality is found to be out of specification (such as defects), it will not be bonded to ensure that all polarizing plates after the polarizing structure 100 are bonded With qualified quality. In this way, the trimmed polarizing unit plate may not require quality inspection, or reduce quality inspection items to increase production efficiency.

The polarizing film 111 includes a first cover layer 1111, a polarizing layer 1112, and a second cover layer 1113. The material of the first cover layer 1111 and the second cover layer 1113 may be a thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture barrier property, etc., and may include, for example, cellulose resin, acrylic resin, and amorphous Polyolefin-based resins, polyester-based resins, polycarbonate-based resins, and combinations thereof, specifically including polymethylmethacrylate (PMMA), and cellulose-based resins refer to a part of the hydroxyl groups of cellulose being acetate Resins, or mixed esters that are partially esterified with acetate and partially esterified with other esters. The cellulose-based resin is preferably a cellulose ester-based resin, more preferably an acetyl cellulose-based resin, such as triethyl acetyl cellulose, diethyl acetyl cellulose, cellulose acetate propionate, cellulose Acetate butyrate, etc., cellulose that is fully esterified is called triacetate cellulose (TAC), acrylic resin film, polyaromatic hydroxy resin film, polyether resin film, cyclic polyolefin resin film (such as polyacrylic acid). (Norbornene resin film), polycarbonate resin such as polyester formed from carbonic acid and diol or bisphenol, such as: polyethylene terephthalate (Polyethylene Terephthalate, PET), polypropylene (Polypropylene, PP ), polyethylene (PE), non-crystalline polyolefin resins such as cyclo olefin (co) polymers (COC/COP), composed of norbornene and cyclopentadiene , Dicyclopentadiene, tetracyclododecene and other ring-opening polymers, or copolymers with olefins, polycarbonate (Polycarbonate, PC) and any combination of the above group. In addition, the first protective film material may be, for example, thermosetting resin such as (meth)acrylic system, urethane system, acrylic urethane system, epoxy system, polysiloxane system, etc. 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 may be, for example, ultraviolet absorbers, antioxidants, lubricants, plasticizers, mold release agents, anti-coloring agents, flame retardants, nucleating agents, antistatic agents, pigments, colorants, or the like.

The polarizing layer 1112 may be a polyvinyl alcohol (PVA) film that adsorbs aligned dichroic pigments or is formed of 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 (Cyclo Olefin Polymer, COP ), polycarbonate (Polycarbonate, PC) or any combination of the above.

The polarizing film 121 includes a first cover layer 1211, a polarizing layer 1212, and a second cover 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 repeated here.

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

In one embodiment, the materials of the first protective films 112 and 122 may be, for example, (meth)acrylic, urethane, acrylic urethane, epoxy, polysilicon, etc. Thermosetting resin or ultraviolet curing resin.

In an embodiment, the second protective film 140 may be, for example, a polyethylene terephthalate film coated with a release agent, and the release agent is, for example, 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 polarizing plate 110 has 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 opposite second long sides 121e1 and 121e2. The second protective film 140 continuously extends to two first long sides 111e1, 111e2 and 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 polarizing plate 110 and the entire second surface 121b of the polarizing film 121 of the second polarizing plate 120 to further enhance the overall strength of the polarizing structure 100 .

As shown in FIG. 1B, the adhesive layer 113 of the first polarizing plate 110 is formed between the polarizing film 111 and the first protective film 112 so that the first protective film 112 adheres the polarizing film 111 through the adhesive layer 113. The adhesive layer 123 of the second polarizing plate 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 adhesive 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 acid copolymer, for example, a material that may include but is not limited to functional groups, such as ( Materials such as methyl methacrylate, ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate.

As shown in FIG. 1B, the first bonding member 130 includes a bonding layer 131 and an adhesive layer 132. Before the first bonding member 130 bonds the first polarizing plate 110 and the second polarizing plate 120, the adhesive layer 132 may be pre-formed on the bonding layer 131 to form the first bonding member 130. The first bonding member 130 is bonded to the first protective films 112 and 122 with an adhesive layer 132 to bond 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 that of the adhesive layer 113, and will not be repeated here. In one embodiment, the adhesive layer 132 may be a silicon adhesive with a thickness ranging from about 0.03 μm to 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-light-transmitting layer can show the junction of the first polarizing plate 110 and the second polarizing plate 120, so as to quickly identify the position of the junction. In one embodiment, the thickness of the bonding layer 131 is smaller than that of the adhesive layer 132. In one 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, an adhesive 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 member 150 may cover at least a part of the adhesive surface 140s of the second protective film 140, such as the entire adhesive surface 140s.

As shown in FIG. 1A, the adhesive 150 may 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 111b of the polarizing film 111 of the first polarizing plate 110 and the entire second surface 121b of the polarizing film 121 of the second polarizing plate 120. The material of the adhesive member 150 is the same as or similar to the adhesive 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 at least partially overlaps with the top view area of the adhesive 150, such as completely overlapping, and/or The plan view area surrounded by the boundary of the first polarizing plate 110 and the second polarizing plate 120 and the plan 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 illustrates 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 bonding member 130, a second protective film 140, an adhesive member 150, and a second bonding member 260.

The polarizing structure 200 of the embodiment of the present invention has similar or identical features and technical effects to the polarizing structure 200, but the difference is that the polarizing structure 200 further includes a second bonding 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 bond the first polarizing plate 110 and the second polarizing plate 120 , And the adhesive member 150 and the second protective film 140 cover the entire second bonding member 260. Since the second bonding member 260 has a thickness, a protrusion P1 is formed at the position of the second protective film 140 and the bonding member 150 corresponding to the second bonding 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 adhesive layer 262 are similar or the same as the bonding layer 131 and the adhesive layer 132, respectively, and will not be repeated here. In this embodiment, by providing the second engaging member 260, the first engaging member 130 and the upper and lower sides of the first engaging member 130 can simultaneously provide better support.

Please refer to FIG. 3, which illustrates a cross-sectional view of a polarizing structure 300 according to another embodiment of the invention. The polarizing structure 300 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 polarizing structure 300 of the embodiment of the present invention has similar or identical features and technical effects to the polarizing structure 100, except 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 polarizing plate 120, and the adhesive 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 disposing the first bonding member 130' and the second protective film 140 to be adhered on the same side, the working side is unified, which can facilitate the setting of the process bonding direction and the winding mechanism to further improve effectiveness. In addition, the first engaging member 130' of this embodiment has a structure and/or material similar to or the same as that of the aforementioned first engaging 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 of FIG.

As shown in FIG. 4A, a first polarizing plate 110 and a second polarizing plate 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 opposing first and second surfaces 111u and 111b. The first protective film 112 is disposed on the first surface 111u of the polarizing film 111. The adhesive 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 opposing first surface 121u and second surface 121b. The first protective film 122 is disposed on the first surface 121u 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 polarizing plate 110 and the first protective film 122 of the second polarizing plate 120 are bonded with the first bonding member 130 using a bonding machine (not shown) or manual, To join the first polarizing plate 110 and the second polarizing plate 120. The structure of FIG. 4B is called a bonding structure 100'. The quality of the polarizing plate can be checked in advance before this bonding process or the step in FIG. 4A. If the quality is found to be out of specification (such as defects), it will not be bonded to ensure that all polarizing plates after the bonding of the polarizing structure 100 have qualified quality . In this way, in the cutting process after the step in FIG. 4C, the polarized unit plate after cutting may not require quality inspection, or may reduce the quality inspection items to increase production efficiency.

Then, using the pressing mechanism 10 shown in FIG. 4C, the bonding member 150 and the bonding structure 100' shown in FIG. 4B are pressed to form the polarizing structure 100 shown in FIG. 1B. As shown in FIG. 4C, in this embodiment, the adhesive member 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, the second protective film 140 is adhered to the joint structure 100' with an adhesive 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 with an adhesive 150.

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

Finally, the same pressing mechanism 10 or different mechanisms 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, the polarizing structure 100 combined with a plurality of polarizing plates can be cut out with more polarizing unit plates due to a larger length, so as to increase production efficiency. In addition, since all the polarizing plates have been connected to the polarizing structure 100 before cutting, which has a large length, the number of times and/or man-hours for replacing the polarizing structure in the cutting process can be reduced, for example, the polarizing structure 100 is set in the cutting mechanism, and/or man-hours such as the calibration of the polarizing structure 100 on the cutting mechanism, and in a certain man-hour (such as the same man-hour), more polarizing unit plates can be cut and reduced The waste of calibration to increase production efficiency and/or cost savings.

In another embodiment, the adhesive member 150 of FIG. 4C may be pre-coated or disposed on the entire second surface 111b and the entire second surface 121b of the bonding structure 100' of FIG. 4B. In this example, the first transmission wheel group 11 is used to transmit the combined bonding structure 100' and the adhesive member 150, and the second transmission wheel group 12 is used to transmit the second protective film 140. The second protective film 140 and the combined bonding 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 press-fitting can also form the polarizing structure 100 as shown in FIG. 1B.

The manufacturing method of the polarizing structure 200 is similar to 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 first polarizing plate 110 With the second polarizer 120, the overall bonding strength of the first polarizer 110 and the second polarizer 120 can be further strengthened. The remaining manufacturing steps of the polarizing structure 200 are similar to 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 is similar to that of the polarizing structure 100, except that the first bonding member 130 adheres to the second surface 111b and the second surface 121b of the bonding structure 100' in FIG. 4B to bond the first polarizing plate 110 and the first Two 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 as above with examples, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention belongs can make various modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be deemed as defined by the scope of the attached patent application.

10‧‧‧Pressing mechanism 11‧‧‧First transmission wheel group 11a‧‧‧First pressing wheel 11b‧‧‧First roller 12‧‧‧Second transmission wheel group 12a‧‧‧Second pressing wheel 12b‧‧‧Second roller 100, 200, 300‧‧‧ Polarized structure 100′‧‧‧Joint structure 110‧‧‧ First polarizer 111, 121‧‧‧ Polarized film 111u, 121u‧‧‧ First surface 111b 、121b‧‧‧Second surface 111e1, 111e2‧‧‧ First long side 1111, 1211‧‧‧ First cover layer 1112, 1212‧‧‧ Polarizing layer 1113, 1213‧‧‧ Second cover layer 112, 122‧ ‧‧ First protective film 113, 123‧‧‧ Adhesive layer 120‧‧‧Second polarizing plates 121e1, 121e2 ‧‧‧Second long side 130, 130′‧‧‧ First bonding member 131, 261‧‧‧ Layers 132, 262‧‧‧adhesive layer 140‧‧‧second protective film 140s‧‧‧adhesive surface 150‧‧‧adhesive member 260‧‧‧second engaging member P1‧‧‧projection

FIG. 1A is a bottom view of a polarizing structure according to an embodiment of the invention. FIG. 1B is 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 in 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. FIGS. 4A to 4C show the bonding process diagram of the polarizing structure of FIG. 1.

100‧‧‧ Polarized structure

110‧‧‧First polarizer

111, 121‧‧‧ Polarized film

111u, 121u‧‧‧First surface

111b, 121b‧‧‧Second surface

1111, 1211‧‧‧ First cover

1112, 1212‧‧‧ Polarized layer

1113, 1213‧‧‧Second cover

112、122‧‧‧The first protective film

113, 123‧‧‧ adhesive layer

120‧‧‧Second polarizer

130‧‧‧The first joint

131‧‧‧Joint layer

132‧‧‧ adhesive layer

140‧‧‧Second protective film

140s‧‧‧adhesive surface

150‧‧‧bonded parts

Claims (17)

A polarizing structure includes: 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 bonding member bonding the first protective film of the first polarizing plate and the first protective film of the second 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; a second protective film formed on the polarizing film of the first polarizing plate The second surface and the second surface of the polarizing film of the second polarizing plate span the junction of the first polarizing plate and the second polarizing plate. The polarizing structure as described in item 1 of the patent application range, wherein the second protective film is formed 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 Two surfaces. The polarizing structure as described in item 1 of the patent application range, wherein the second surface of the polarizing film of the first polarizing plate has opposite first long sides, and the second surface of the polarizing film of the second polarizing plate With two opposite second long sides, the second protective film extends to the two first long sides and the two second long sides. The polarizing structure as described in item 1 of the patent application scope, wherein the first bonding 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 bonding member for 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; wherein, the second protective film covers the entire second bonding Pieces. The polarizing structure as described in item 4 of the patent application scope, wherein the second protective film forms a protrusion corresponding to the position of the second bonding member. The polarizing structure as described in item 1 of the patent application range, 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 bonding member. The polarizing structure as described in item 6 of the patent application scope, wherein the second protective film forms a protrusion corresponding to the position of the first engaging member. The polarizing structure as described in item 1 of the patent application scope, wherein the first protective film is one of a surface protective film and a release film, and the second protective film is the surface protective film and the release film The other. The polarizing structure as described in item 1 of the patent application scope, wherein the first polarizing plate and the second polarizing plate are each a continuous roll. The polarizing structure as described in item 1 of the patent application scope, wherein the first bonding member includes a bonding layer and an adhesive layer, the adhesive layer is formed on the bonding layer in advance, and the thickness of the bonding layer is smaller than that of the bonding layer thickness. A bonding method of 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, and each of the polarizing films Having a first surface and a second surface opposite to each other, and each of the first protective films is disposed on the first surface of the corresponding polarizing film; a first bonding member is used to bond the first surface of the first polarizing plate A protective film and the first protective film of the second polarizing plate, or the second surface of the polarizing film joining the first 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 second surface of the polarizing film of the second polarizing plate and across the first polarizing plate and the second polarizing plate Junction. The bonding method as described in item 11 of the patent application range, wherein in the step of forming the second protective film, the second protective film is formed on the second surface of the polarizing film of the first polarizing plate and the second The second surface of the polarizing film of the polarizing plate. The bonding method as described in item 11 of the patent application range, wherein the second surface of the polarizing film of the first polarizing plate has opposite first long sides, and the second surface of the polarizing film of the second polarizing plate It has relatively two 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 as described in item 11 of the patent application range, wherein in the step of bonding with the first bonding member, the first bonding member bonds the first protective film of the first polarizer and the second polarizer The first protective film; the polarizing structure further includes: a second bonding member is used 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 bonding member. The bonding method as described in item 14 of the patent application range, wherein in the step of forming the second protective film, the second protective film forms a protrusion corresponding to the position of the second bonding member. The bonding method as described in item 11 of the patent application range, wherein in the step of bonding with the first bonding member, the first bonding member bonds the second surface of the polarizing film of the first polarizing plate 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 bonding member. The bonding method as described in Item 16 of the patent application range, wherein in the step of forming the second protective film, the second protective film forms a protrusion corresponding to the position of the second bonding member.

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