TWI672533B - Polarizing plate - Google Patents
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Abstract
一種偏光板，包括：一偏光膜、一第一保護膜和一第二保護膜。該第一保護膜與該第二保護膜分別配置於該偏光膜的兩側。該第二保護膜的一第一幅寬相對於該第一保護膜的一幅寬的一比例係為大於或等於97%且小於100%。 A polarizing plate includes a polarizing film, a first protective film, and a second protective film. The first protective film and the second protective film are respectively disposed on both sides of the polarizing film. A ratio of a first width of the second protective film to a width of the first protective film is greater than or equal to 97% and less than 100%.
Description
本揭露是有關於一種偏光板。 This disclosure is about a polarizer.
偏光板是液晶顯示裝置的主要元件之一，隨著液晶顯示裝置的普及，偏光板的需求也急速地增加。因此，隨著液晶顯示裝置在大型電視機等的應用，對於偏光板性能之維持或改進也產生更多的要求，例如薄型化及降低製造成本等等。 Polarizing plates are one of the main components of liquid crystal display devices. With the popularity of liquid crystal display devices, the demand for polarizing plates has also increased rapidly. Therefore, with the application of liquid crystal display devices in large televisions and the like, there are more requirements for maintaining or improving the performance of polarizing plates, such as thinning and reducing manufacturing costs.
本揭露係有關於一種偏光板。實施例中，對偏光膜一側的第二保護膜進行熱處理並增加施加的張力，而使得第二保護膜的回復變形的收縮力大於偏光膜另一側的第一保護膜的收縮力，因此第二保護膜會朝向回復變形的方向發生翹曲，而使得最後製作完成的具有偏光膜、第一保護膜和第二保護膜的偏光板具有預定的翹曲度。 This disclosure relates to a polarizing plate. In the embodiment, the second protective film on one side of the polarizing film is heat-treated and the applied tension is increased, so that the shrinking force of the second protective film's recovery deformation is larger than that of the first protective film on the other side of the polarizing film. The second protective film is warped toward the direction of recovery and deformation, so that the finally completed polarizing plate having the polarizing film, the first protective film, and the second protective film has a predetermined degree of warping.
根據本揭露之一實施例，提出一種偏光板的製造方法。偏光板的製造方法包括以下步驟：提供一偏光膜、一第一保護膜和一第二保護膜；對第二保護膜進行一熱處理；對第二保護膜進行熱處理 後，沿一輸送方向增加施加在第二保護膜的張力，以使得第二保護膜沿幅寬方向的拉伸應力大於第一保護膜沿幅寬方向的拉伸應力；以及分別貼合第一保護膜和第二保護膜於偏光膜的相對的一第一側和一第二側。 According to an embodiment of the present disclosure, a method for manufacturing a polarizing plate is provided. A method for manufacturing a polarizing plate includes the following steps: providing a polarizing film, a first protective film, and a second protective film; performing a heat treatment on the second protective film; and performing a heat treatment on the second protective film Then, increase the tension applied to the second protective film along a conveying direction, so that the tensile stress of the second protective film in the width direction is greater than the tensile stress of the first protective film in the width direction; The protective film and the second protective film are disposed on a first side and a second side opposite to the polarizing film.
根據本揭露之另一實施例，提出一種偏光板。偏光板包括一偏光膜、一第一保護膜和一第二保護膜，第一保護膜與第二保護膜分別配置於偏光膜的兩側。第二保護膜的一第一幅寬相對於第一保護膜的一幅寬的一比例係為大於或等於97%且小於100%。 According to another embodiment of the present disclosure, a polarizing plate is provided. The polarizing plate includes a polarizing film, a first protective film, and a second protective film. The first protective film and the second protective film are respectively disposed on two sides of the polarizing film. A ratio of a first width of the second protective film to a width of the first protective film is greater than or equal to 97% and less than 100%.
為了對本發明之上述及其他方面有更佳的瞭解，下文特舉實施例，並配合所附圖式詳細說明如下： In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are described in detail below in conjunction with the accompanying drawings:
10‧‧‧製程浴槽 10‧‧‧ process bath
20‧‧‧乾燥室 20‧‧‧ drying room
30‧‧‧乾燥加濕反應室 30‧‧‧Dry humidification reaction chamber
40、50、80‧‧‧壓輥組 40, 50, 80‧‧‧Press roller set
51‧‧‧第一輥輪 51‧‧‧The first roller
53‧‧‧第二輥輪 53‧‧‧Second Roller
60‧‧‧紫外線接著劑塗佈裝置 60‧‧‧UV adhesive coating device
70‧‧‧感壓膠塗佈裝置 70‧‧‧Pressure-sensitive adhesive coating device
100‧‧‧偏光膜 100‧‧‧ polarizing film
100a‧‧‧第一側 100a‧‧‧first side
100b‧‧‧第二側 100b‧‧‧Second side
200‧‧‧第一保護膜 200‧‧‧first protective film
300‧‧‧第二保護膜 300‧‧‧Second protective film
400‧‧‧感壓膠層 400‧‧‧ pressure sensitive adhesive layer
500‧‧‧離形膜 500‧‧‧ release film
600‧‧‧表面保護層 600‧‧‧ surface protection layer
700、700’‧‧‧偏光板 700, 700’‧‧‧ polarizing plate
ABCD‧‧‧四邊形 ABCD‧‧‧ Quadrilateral
A、B、C、D、A1、B1、C1、D1‧‧‧角 A, B, C, D, A1, B1, C1, D1‧‧‧
DR1‧‧‧輸送方向 DR1‧‧‧Conveying direction
DR2‧‧‧幅寬方向 DR2‧‧‧width direction
H1‧‧‧高度 H1‧‧‧ height
S1、S2‧‧‧步驟 S1, S2‧‧‧‧ steps
W‧‧‧幅寬 W‧‧‧Width
W1‧‧‧第一幅寬 W1‧‧‧First width
W2‧‧‧第二幅寬 W2‧‧‧ Second width
W3‧‧‧第三幅寬 W3‧‧‧ Third width
第1圖繪示根據本揭露內容之一實施例之一種偏光板的製造方法示意圖。 FIG. 1 is a schematic diagram of a method for manufacturing a polarizing plate according to an embodiment of the disclosure.
第2圖繪示根據本揭露內容所製成之一實施例之一種偏光板的剖面示意圖。 FIG. 2 is a schematic cross-sectional view of a polarizing plate according to an embodiment of the present disclosure.
第3圖繪示根據本揭露內容所製成之另一實施例之一種偏光板的剖面示意圖。 FIG. 3 is a schematic cross-sectional view of a polarizing plate according to another embodiment of the present disclosure.
第4圖繪示根據本揭露內容之一實施例之偏光板之上視圖。 FIG. 4 is a top view of a polarizing plate according to an embodiment of the disclosure.
第5圖繪示根據本揭露內容之一實施例之一種偏光板的立體圖。 FIG. 5 is a perspective view of a polarizing plate according to an embodiment of the disclosure.
本揭露內容之實施例中，對偏光膜一側的第二保護膜進行熱處理並增加施加的張力，而使得第二保護膜的回復變形的收縮力大於偏光膜另一側的第一保護膜的收縮力，因此第二保護膜會朝向回復變形的方向發生翹曲，而使得最後製作完成的具有偏光膜、第一保護膜和第二保護膜的偏光板具有預定的翹曲度。 In the embodiment of the present disclosure, the second protective film on one side of the polarizing film is heat-treated and the applied tension is increased, so that the shrinkage force of the second protective film in the recovery deformation is greater than that of the first protective film on the other side of the polarizing film Due to the shrinkage force, the second protective film will warp in the direction of recovery deformation, so that the finally completed polarizing plate with the polarizing film, the first protective film and the second protective film has a predetermined degree of warpage.
以下係提出各種實施例進行詳細說明，實施例僅用以作為範例說明，並不會限縮本發明欲保護之範圍。在不同實施例與圖式之中，相同的元件，將以相同的元件符號加以表示。值得注意的是，這些特定的實施例，並非用以限定本發明。本發明仍可採用其他特徵、元件、方法及參數來加以實施。實施例的提出，僅係用以例示本發明的技術特徵，並非用以限定本發明的申請專利範圍。該技術領域中具有通常知識者，將可根據以下說明書的描述，在不脫離本發明的精神範圍內，作均等的修飾與變化。此外，實施例中之圖式係省略部份元件，以清楚顯示本發明之技術特點。 The following is a detailed description of various embodiments. The embodiments are only used as examples, and do not limit the scope of the present invention. In different embodiments and drawings, the same elements will be represented by the same element symbols. It should be noted that these specific embodiments are not intended to limit the present invention. The invention can still be implemented with other features, elements, methods and parameters. The proposal of the embodiments is only used to illustrate the technical features of the present invention, and is not intended to limit the scope of patent application of the present invention. Those with ordinary knowledge in the technical field can make equal modifications and changes according to the description of the following description without departing from the spirit of the present invention. In addition, some elements in the drawings in the embodiments are omitted to clearly show the technical features of the present invention.
第1圖繪示根據本揭露內容之一實施例之一種偏光板的製造方法示意圖，第2圖繪示根據本揭露內容所製成之一實施例之一種偏光板的剖面示意圖，第3圖繪示根據本揭露內容所製成之另一實施例之一種偏光板的剖面示意圖。 FIG. 1 is a schematic diagram of a method for manufacturing a polarizing plate according to an embodiment of the present disclosure, FIG. 2 is a schematic cross-sectional view of a polarizing plate according to an embodiment of the present disclosure, and FIG. 3 is a schematic diagram of a polarizing plate A schematic sectional view of a polarizing plate according to another embodiment of the present disclosure is shown.
如第1圖所示，提供一偏光膜100、一第一保護膜200和一第二保護膜300。 As shown in FIG. 1, a polarizing film 100, a first protective film 200 and a second protective film 300 are provided.
實施例中，偏光膜100的材料可為聚乙烯醇(PVA)樹脂膜，其可藉由皂化聚醋酸乙烯樹脂製得。聚醋酸乙烯樹脂的例子包括醋酸乙烯之單聚合物，即聚醋酸乙烯，以及醋酸乙烯之共聚合物和其他能與醋酸乙烯進行共聚合之單體。 In the embodiment, the material of the polarizing film 100 may be a polyvinyl alcohol (PVA) resin film, which may be made by saponifying a polyvinyl acetate resin. Examples of the polyvinyl acetate resin include a single polymer of vinyl acetate, that is, polyvinyl acetate, and a copolymer of vinyl acetate and other monomers capable of copolymerizing with vinyl acetate.
第一保護膜200和第二保護膜300可分別獨立地為單層或多層之結構。第一保護膜200和第二保護膜300之材料可分別獨立地例如是透明性、機械強度、熱穩定性、水分阻隔性等優良之熱可塑性樹脂。熱可塑性樹脂可包括纖維素樹脂(例如：三醋酸纖維素(Triacetate Cellulose，TAC)、二醋酸纖維素(Diacetate Cellulose，DAC))、丙烯酸樹脂(例如：聚甲基丙烯酸甲酯(Poly(methyl methacrylate)，PMMA)、聚酯樹脂(例如，聚對苯二甲酸乙二酯(Polyethylene Terephthalate，PET)、聚萘二甲酸乙二酯)、烯烴樹脂、聚碳酸酯樹脂(Polycarbonate，PC)、環烯烴樹脂、定向拉伸性聚丙烯(Oriented-Polypropylene，OPP)、聚乙烯(Polyethylene，PE)、聚丙烯(Polypropylene，PP)、環烯烴聚合物(Cyclic Olefin Polymer，COP)、環烯烴共聚合物(Cyclic Olefin Copolymer，COC)、或上述之任意組合。除此之外，第一保護膜200和第二保護膜300之材料還可分別獨立地例如是(甲基)丙烯酸系、胺基甲酸酯系、丙烯酸胺基甲酸酯系、環氧系、聚矽氧系等熱硬化性樹脂或紫外線硬化型樹脂。此外，亦可進一步對上述第一保護膜200和第二保護膜300分別獨立地實行表面處理，例如，抗眩光處理、抗反射處理、硬塗處理、帶電防止處理或抗污處理等。 The first protective film 200 and the second protective film 300 may have a single-layer or multi-layer structure independently. The materials of the first protective film 200 and the second protective film 300 can be independently, for example, excellent thermoplastic resins having excellent transparency, mechanical strength, thermal stability, and moisture barrier properties. Thermoplastic resins can include cellulose resins (for example: Triacetate Cellulose (TAC), Diacetate Cellulose (DAC)), acrylic resins (for example: Poly (methyl methacrylate) ), PMMA), polyester resins (for example, polyethylene terephthalate (PET), polyethylene naphthalate), olefin resins, polycarbonate resins (Polycarbonate, PC), cycloolefins Resin, Oriented-Polypropylene (OPP), Polyethylene (PE), Polypropylene (PP), Cyclic Olefin Polymer (COP), Cyclic Olefin Copolymer ( Cyclic Olefin Copolymer (COC), or any combination thereof. In addition, the materials of the first protective film 200 and the second protective film 300 can also be independently (meth) acrylic, urethane, for example Based, acrylic urethane based, epoxy based, polysilicone based thermosetting resin or UV curable resin. In addition, the first protective film 200 and the second protective film 300 may be further separated from each other. To carry out surface treatment, e.g., anti-glare treatment, antireflection treatment, hard coat treatment, antistatic treatment or antifouling treatment.
實施例中，第一保護膜200和第二保護膜300可為一多層結構，包含一熱可塑性樹脂及一功能層，功能層為具有調整光學性質之膜層，例如增亮膜、反射式增亮膜(Dual Brightness Enhancement Film,DBEF)、進階偏光膜(Advanced Polarizer Film,APF)、位相差膜、菱鏡膜、色域調整膜、量子點膜、濾光膜、光柵層、或上述之任意組合。 In the embodiment, the first protective film 200 and the second protective film 300 may have a multilayer structure including a thermoplastic resin and a functional layer. The functional layer is a film layer having optical properties, such as a brightness enhancement film and a reflective film. Dual Brightness Enhancement Film (DBEF), Advanced Polarizer Film (APF), phase difference film, diamond mirror film, color gamut adjustment film, quantum dot film, filter film, grating layer, or the above Any combination.
如第1圖所示，第一保護膜200和第二保護膜300例如可沿輸送方向DR1分別依序經過製程浴槽10、乾燥室20以及乾燥加濕反應室30。在一實施例中，第一保護膜200和第二保護膜300可分別經過至少一個製程浴槽10，於其中進行染色交聯製程、表面處理製程或水洗製程。 As shown in FIG. 1, for example, the first protective film 200 and the second protective film 300 can sequentially pass through the process bath 10, the drying chamber 20, and the drying and humidifying reaction chamber 30 along the conveying direction DR1, respectively. In one embodiment, the first protective film 200 and the second protective film 300 may pass through at least one process bath 10, respectively, in which a dyeing and crosslinking process, a surface treatment process, or a water washing process is performed.
如第1圖所示，對第二保護膜300進行一熱處理。舉例而言，第二保護膜300在乾燥室20中進行加熱乾燥而去除液體，例如是處理液及/或水洗液。一些實施例中，乾燥室20例如是一烘箱，但不以此為限。 As shown in FIG. 1, the second protective film 300 is subjected to a heat treatment. For example, the second protective film 300 is heated and dried in the drying chamber 20 to remove a liquid, such as a treatment liquid and / or a water washing liquid. In some embodiments, the drying chamber 20 is, for example, an oven, but is not limited thereto.
第二保護膜300之熱處理的步驟例如包括在約100℃加熱第二保護膜300約30~60秒。 The step of heat-treating the second protective film 300 includes, for example, heating the second protective film 300 at about 100 ° C. for about 30 to 60 seconds.
亦可對第一保護膜200進行一熱處理，舉例而言，第一保護膜200亦可在乾燥室20中加熱乾燥而去除液體，例如是處理液及/或水洗液。第一保護膜200之熱處理的步驟例如包括在約100℃加熱第一保護膜200約30~60秒。 The first protective film 200 may also be subjected to a heat treatment. For example, the first protective film 200 may also be heated and dried in the drying chamber 20 to remove a liquid, such as a treatment liquid and / or a water washing liquid. The step of heat-treating the first protective film 200 includes, for example, heating the first protective film 200 at about 100 ° C. for about 30 to 60 seconds.
如第1圖所示，可選擇性地進一步對第一保護膜200和/或第二保護膜300進行乾燥加濕製程，例如可將在乾燥室20中加熱乾燥後的第一保護膜200和/或第二保護膜300沿輸送方向DR1導引至乾燥加濕反應室30中。 As shown in FIG. 1, the first protective film 200 and / or the second protective film 300 may be optionally further dried and humidified. For example, the first protective film 200 and the dried protective film 200 may be heated and dried in a drying chamber 20. The second protective film 300 is guided into the drying and humidifying reaction chamber 30 in the conveying direction DR1.
實施例中，對第二保護膜300進行熱處理後，沿輸送方向DR1增加施加在第二保護膜300的張力，以使得第二保護膜300沿一幅寬方向DR2的拉伸應力大於第一保護膜200沿幅寬方向DR2的拉伸應力。如此一來，經由增加第二保護膜300的張力，而使得第二保護膜300的回復變形的收縮力大於第一保護膜200的收縮力，因此第二保護膜300會朝向回復變形的方向發生翹曲，而使得最後製作完成的具有偏光膜100、第一保護膜200和第二保護膜300的偏光板具有預定的翹曲度。 In the embodiment, after the second protective film 300 is heat-treated, the tension applied to the second protective film 300 is increased along the conveying direction DR1, so that the tensile stress of the second protective film 300 in a width direction DR2 is greater than that of the first protective film. The tensile stress of the film 200 in the width direction DR2. In this way, by increasing the tension of the second protective film 300, the shrinkage force of the second protective film 300 during the recovery deformation is greater than that of the first protective film 200, so the second protective film 300 will occur in the direction of the recovery deformation. Warping, so that the finally completed polarizing plate having the polarizing film 100, the first protective film 200, and the second protective film 300 has a predetermined degree of warping.
根據本揭露之實施例，第二保護膜300先經過熱處理而軟化膨脹之後，有利於後續增加張力之步驟的進行，經熱處理而軟化膨脹的第二保護膜300較不易因為增加較大張力而斷裂，因此可以具有較大的張力增加之調節程度，而可以製作成具有預定翹曲度的偏光板。 According to the embodiment of the present disclosure, after the second protective film 300 is softened and expanded after being heat-treated, it is beneficial to the subsequent step of increasing the tension. The second protective film 300 that is softened and expanded after being heat-treated is less likely to break due to the increased tension. Therefore, it is possible to have a large degree of adjustment of tension increase, and a polarizing plate having a predetermined warpage degree can be manufactured.
舉例而言，如第1圖所示，藉由壓輥組40增加施加在第二保護膜300的張力，沿輸送方向DR1增加施加在第二保護膜300的張力至約500~600N。當張力增加至超過600N時，有可能造成第二保護膜300發生斷裂；當張力增加量太小而不足500N時，則可能導致收縮應力不足而無法使得第二保護膜300朝向回復變形的方向發生翹曲。 For example, as shown in FIG. 1, the tension applied to the second protective film 300 is increased by the pressing roller group 40, and the tension applied to the second protective film 300 is increased to about 500 to 600 N in the conveying direction DR1. When the tension is increased to more than 600N, the second protective film 300 may be broken; when the tension is too small and less than 500N, the contraction stress may be insufficient to cause the second protective film 300 to return to the deformation direction. Warping.
如第1圖所示，分別貼合第一保護膜200和第二保護膜300於偏光膜100的相對的第一側100a和第二側100b。舉例而言，例如可藉由壓輥組50將第一保護膜200和第二保護膜300貼合於偏光膜100上。 As shown in FIG. 1, the first protective film 200 and the second protective film 300 are bonded to the first and second sides 100 a and 100 b of the polarizing film 100, respectively. For example, for example, the first protective film 200 and the second protective film 300 may be attached to the polarizing film 100 by the pressing roller group 50.
也可以藉由壓輥組50的兩個輥輪的轉動速度不同而提供增加的張力至第二保護膜300上。舉例而言，第一輥輪51的轉動速度例如是R1，第二輥輪53的轉動速度例如是R2，則轉動速度的比例R2/R1例如是1.01~1.04。 It is also possible to provide increased tension to the second protective film 300 by different rotation speeds of the two rollers of the pressing roller group 50. For example, if the rotation speed of the first roller 51 is R1 and the rotation speed of the second roller 53 is R2, for example, the ratio R2 / R1 of the rotation speed is 1.01 to 1.04.
如第1圖所示的實施例中，可塗佈紫外線接著劑於第一保護膜200上和第二保護膜300上，以分別貼合第一保護膜200和第二保護膜300至偏光膜100的相對的第一側100a和第二側100b。例如藉由紫外線接著劑塗佈裝置60將紫外線接著劑分別塗佈至第一保護膜200上和第二保護膜300上。 In the embodiment shown in FIG. 1, an ultraviolet adhesive may be applied on the first protective film 200 and the second protective film 300 to adhere the first protective film 200 and the second protective film 300 to the polarizing film, respectively. Opposite first side 100a and second side 100b of 100. For example, the ultraviolet adhesive is applied to the first protective film 200 and the second protective film 300 by the ultraviolet adhesive applying device 60, respectively.
至此，形成根據本揭露內容所製成之一實施例之一種偏光板700，其剖面圖如第2圖所示。如第2圖所示的偏光板700包括偏光膜100、第一保護膜200和第二保護膜300，且經過熱處理以及增加張力的第二保護膜300具有一第一幅寬W1，第一幅寬W1小於第一保護膜200的幅寬W。 So far, a polarizing plate 700 according to an embodiment of the present disclosure is formed, and a cross-sectional view thereof is shown in FIG. 2. The polarizing plate 700 shown in FIG. 2 includes a polarizing film 100, a first protective film 200, and a second protective film 300. The second protective film 300 which has undergone heat treatment and increased tension has a first width W1, and a first width The width W1 is smaller than the width W of the first protective film 200.
如第1圖所示，可塗佈一感壓膠層400於第二保護膜300上，以及貼合一離形膜500於感壓膠層400上，第二保護膜300位於感壓膠層400和偏光膜100之間。一些實施例中，如第1圖所示，例如藉由感壓膠塗佈裝置70將感壓膠層塗佈至第二保護膜300上。 As shown in FIG. 1, a pressure-sensitive adhesive layer 400 may be coated on the second protective film 300, and a release film 500 may be attached to the pressure-sensitive adhesive layer 400, and the second protective film 300 is located on the pressure-sensitive adhesive layer. 400 and the polarizing film 100. In some embodiments, as shown in FIG. 1, for example, the pressure-sensitive adhesive layer is coated on the second protective film 300 by the pressure-sensitive adhesive coating device 70.
如第1圖所示，可貼合一表面保護層600於第一保護膜200上，第一保護膜200位於表面保護層600和偏光膜100之間。 As shown in FIG. 1, a surface protection layer 600 can be attached to the first protection film 200. The first protection film 200 is located between the surface protection layer 600 and the polarizing film 100.
一些實施例中，如第1圖所示，可藉由壓輥組80進行貼合前述的感壓膠層400、離形膜500和表面保護層600之步驟。 In some embodiments, as shown in FIG. 1, the step of laminating the pressure-sensitive adhesive layer 400, the release film 500, and the surface protection layer 600 described above can be performed by the pressing roller group 80.
至此，形成根據本揭露內容所製成之一實施例之一種偏光板700’，其剖面圖如第3圖所示。如第3圖所示的偏光板700’包括偏光膜100、第一保護膜200、第二保護膜300、感壓膠層400、離形膜500和表面保護層600，且經過熱處理以及增加張力的第二保護膜300具有一第一幅寬W1，第一幅寬W1小於第一保護膜200的幅寬W。 So far, a polarizing plate 700 'according to an embodiment of the present disclosure is formed, and a cross-sectional view thereof is shown in FIG. The polarizing plate 700 'shown in FIG. 3 includes a polarizing film 100, a first protective film 200, a second protective film 300, a pressure-sensitive adhesive layer 400, a release film 500, and a surface protective layer 600, and is subjected to heat treatment and increased tension. The second protective film 300 has a first width W1, and the first width W1 is smaller than the width W of the first protection film 200.
第4圖繪示根據本揭露內容之一實施例之偏光板之上視圖。實施例中，第二保護膜300依序進行熱處理的步驟S1以及增大張力的步驟S2，第4圖繪示了第二保護膜300的幅寬的變化情形。 FIG. 4 is a top view of a polarizing plate according to an embodiment of the disclosure. In the embodiment, the second protective film 300 is sequentially subjected to the step S1 of heat treatment and the step S2 of increasing the tension. FIG. 4 illustrates a change in the width of the second protective film 300.
實施例中，如第4圖所示，對第二保護膜300進行熱處理的步驟S1後、且沿輸送方向DR1增加施加在第二保護膜300的張力的步驟S2後，第二保護膜300具有一第一幅寬W1，第一幅寬W1小於第一保護膜200的幅寬W(未繪示於第4圖中)。一些實施例中，第二保護膜300的第一幅寬W1相對於第一保護膜200的幅寬W的一比例(W1/W)係為大於或等於97%且小於100%。一些實施例中，第二保護膜300的第一幅寬W1相對於第一保護膜200的幅寬W的一比例(W1/W)係為大於或等於98.5%且小於100%。一些實施例中，第一保護膜200的幅寬例如實質上等於第二保護膜300在進行熱處理的步驟S1之前的幅寬(也就是後文所述的第三幅寬W3)。 In the embodiment, as shown in FIG. 4, after step S1 of performing heat treatment on the second protective film 300, and after step S2 of increasing the tension applied to the second protective film 300 along the conveying direction DR1, the second protective film 300 has A first width W1 is smaller than the width W of the first protective film 200 (not shown in FIG. 4). In some embodiments, a ratio (W1 / W) of the first width W1 of the second protective film 300 to the width W of the first protective film 200 is greater than or equal to 97% and less than 100%. In some embodiments, a ratio (W1 / W) of the first width W1 of the second protective film 300 to the width W of the first protective film 200 is greater than or equal to 98.5% and less than 100%. In some embodiments, the width of the first protection film 200 is substantially equal to the width of the second protection film 300 before the heat treatment step S1 (ie, the third width W3 described later).
實施例中，如第4圖所示，第二保護膜300進行熱處理的步驟S1後、且沿輸送方向DR1增加施加在第二保護膜300的張力的步驟S2前，第二保護膜300具有一第二幅寬W2，第二幅寬W2大於第一幅寬W1。換言之，增加張力的步驟S2將第二保護膜300沿輸送方向DR1拉伸而使得第二保護膜300的幅寬縮小，使得此時的第二保護膜300的回復變形的收縮力大於第一保護膜200的收縮力。 In the embodiment, as shown in FIG. 4, after step S1 of performing heat treatment on the second protective film 300 and before step S2 of increasing the tension applied to the second protective film 300 along the conveying direction DR1, the second protective film 300 has a The second width W2 is larger than the first width W1. In other words, the step S2 of increasing the tension stretches the second protective film 300 in the conveying direction DR1 so that the width of the second protective film 300 is reduced, so that the shrinking force of the second protective film 300 at this time is larger than that of the first protective film. The shrinking force of the film 200.
一些實施例中，如第4圖所示，對第二保護膜300進行熱處理的步驟S1前，第二保護膜300具有一第三幅寬W3，第三幅寬W3大於第一幅寬W1，且第三幅寬W3小於第二幅寬W2。換言之，第二保護膜300的第三幅寬W3也就是未經過熱處理與增加張力的步驟之前的原始幅寬，第三幅寬W3與第一保護膜200的幅寬W實質上相同。第二保護膜300進行熱處理的步驟S1而軟化膨脹後，具有增大的第二幅寬W2，再經過增加張力的步驟S2後，具有收縮的第一幅寬W1。 In some embodiments, as shown in FIG. 4, before step S1 of performing heat treatment on the second protective film 300, the second protective film 300 has a third width W3, and the third width W3 is larger than the first width W1. And the third width W3 is smaller than the second width W2. In other words, the third width W3 of the second protective film 300 is the original width before the steps of heat treatment and increasing tension, and the third width W3 is substantially the same as the width W of the first protection film 200. After the second protective film 300 is softened and expanded in step S1 of heat treatment, it has an increased second width W2, and after step S2 in which the tension is increased, it has a contracted first width W1.
一些實施例中，第二保護膜300相對於增加張力的收縮率例如是1~1.5%/100N，也就是每增加100N的張力，第二保護膜300的幅寬收縮約1%~1.5%。 In some embodiments, the shrinkage rate of the second protective film 300 with respect to increasing tension is, for example, 1 to 1.5% / 100N, that is, the width of the second protective film 300 shrinks by about 1% to 1.5% for every 100N of increasing tension.
一實施例中，第一保護膜200的幅寬W以及第二保護膜300的第三幅寬W3例如是1980毫米，經過增大張力的步驟S2後的第二保護膜300的第一幅寬W1例如是1960毫米，則第二保護膜300的收縮率大約是1.01%。若以增加張力的收縮率例如是1~1.5%/100N為例，則第二保護膜300相較於第一保護膜200增加的張力約為66~100N，也 就是說，施加在第二保護膜300的張力大約為500~600N，而施加在第一保護膜200的張力大約為400~534N。 In an embodiment, the width W of the first protective film 200 and the third width W3 of the second protective film 300 are, for example, 1980 mm. After the step S2 of increasing the tension, the first width of the second protective film 300 W1 is, for example, 1960 mm, and the shrinkage rate of the second protective film 300 is about 1.01%. For example, if the shrinkage rate of increasing the tension is, for example, 1 to 1.5% / 100N, the increased tension of the second protective film 300 compared to the first protective film 200 is about 66 to 100N. That is, the tension applied to the second protective film 300 is approximately 500 to 600 N, and the tension applied to the first protective film 200 is approximately 400 to 534 N.
另一實施例中，第一保護膜200的幅寬W以及第二保護膜300的第三幅寬W3例如是1540毫米，經過增大張力的步驟S2後的第二保護膜300的第一幅寬W1例如是1510毫米，則第二保護膜300的收縮率大約是1.95%。若以增加張力的收縮率例如是1~1.5%/100N為例，則第二保護膜300相較於第一保護膜200增加的張力約為77~200N，也就是說，施加在第二保護膜300的張力大約為500~600N，而施加在第一保護膜200的張力大約為300~523N。 In another embodiment, the width W of the first protective film 200 and the third width W3 of the second protective film 300 are, for example, 1540 mm. After the step S2 of increasing the tension, the first width of the second protective film 300 The width W1 is, for example, 1510 mm, and the shrinkage rate of the second protective film 300 is about 1.95%. For example, if the shrinkage rate of increasing the tension is, for example, 1 to 1.5% / 100N, the increased tension of the second protective film 300 compared to the first protective film 200 is about 77 to 200N, that is, the second protective film 300 is applied to the second protective film. The tension of the film 300 is approximately 500-600N, and the tension applied to the first protective film 200 is approximately 300-523N.
一些實施例中，根據本揭露內容之實施例的設計，偏光板700/700’的第二保護膜300的單位面積張力比(N/mm2)的變化量大約為2~40%。 In some embodiments, according to the design of the embodiment of the present disclosure, the amount of change in the unit area tension ratio (N / mm 2 ) of the second protective film 300 of the polarizing plate 700/700 'is about 2 ~ 40%.
第5圖繪示根據本揭露內容之一實施例之一種偏光板的立體圖。根據本揭露內容之實施例所製成的偏光板700可具有如第5圖所示的翹曲形狀，其中凸的一側朝下，此狀態為正翹曲。 FIG. 5 is a perspective view of a polarizing plate according to an embodiment of the disclosure. The polarizing plate 700 made according to the embodiment of the present disclosure may have a warped shape as shown in FIG. 5, in which the convex side faces downward, and this state is positive warpage.
如第5圖所示，第二保護膜300側為凸之正翹曲的偏光板700中，使得第二保護膜300側為下，來設置於基準面。以用四邊形ABCD表示的假想面(圖中的虛線所示的面)來顯示假設偏光板700沒有翹曲時的面，在正翹曲的偏光板700中，使假想面中的一個角A在A1的位置，另外的角B、C及D分別在B1、C1及D1的位置，第5圖顯示了偏光板700的四個角A1、B1、C1及D1全浮起的狀態，但也可能存在偏光板700的四個角之中的一個、兩個或三個未浮起之情況。在 此正翹曲狀態下，對偏光板700的四個角A1、B1、C1及D1分別測定離基準面的高度H1，以其最大值作為捲曲量。根據本揭露內容之實施例，在假設正翹曲為正(+)、反翹曲為負(-)之情況下，較佳翹曲量(高度H1)在大於或等於0毫米(mm)至+50毫米(mm)左右的範圍內。 As shown in FIG. 5, in the polarizing plate 700 where the side of the second protective film 300 is convex and positively warped, the side of the second protective film 300 is lowered, and is provided on the reference plane. A hypothetical plane (a plane indicated by a dotted line in the figure) represented by a quadrilateral ABCD is used to display the plane when the polarizing plate 700 is not warped. In the polarizing plate 700 that is warped positively, an angle A of the hypothetical plane is at At the position of A1, the other corners B, C, and D are at the positions of B1, C1, and D1, respectively. Figure 5 shows the four corners A1, B1, C1, and D1 of the polarizing plate 700 all floating, but it is also possible There are cases where one, two, or three of the four corners of the polarizing plate 700 are not floated. in In this positive warped state, the four corners A1, B1, C1, and D1 of the polarizing plate 700 are respectively measured at the height H1 from the reference plane, and the maximum value is used as the curl amount. According to the embodiment of the present disclosure, under the assumption that the positive warpage is positive (+) and the reverse warpage is negative (-), the preferred warpage amount (height H1) is greater than or equal to 0 millimeters (mm) to +50 millimeters (mm).
此外，如第3圖所示的偏光板700’亦可具有如第5圖所示的以第二保護膜300側為凸之正翹曲形狀，感壓膠層400和離形膜500貼合於第二保護膜300側，表面保護層600貼合於第一保護膜200側。 In addition, the polarizing plate 700 ′ shown in FIG. 3 may have a positive warp shape with the second protective film 300 side as a convex as shown in FIG. 5, and the pressure-sensitive adhesive layer 400 and the release film 500 may be bonded together. On the second protective film 300 side, the surface protective layer 600 is adhered to the first protective film 200 side.
一般而言，偏光板不具有翹曲度是最佳的，然而實際上製作完成的偏光板難以避免具有翹曲度。根據本揭露內容之實施例，偏光板700/700’(如第5圖所示)具有從第二保護膜300(感壓膠層400)往第一保護膜200(表面保護膜600)的方向翹曲的正翹曲形狀而具有一翹曲量，如此一來，在將偏光板透過感壓膠層400貼合至顯示面板時，從偏光板的中間位置往兩側的方向擠壓容易將空氣擠出不留下空隙，而可以避免貼合負翹曲(第一保護膜200側凸起)形狀的偏光板貼合至顯示面板時容易因為不易將空氣擠出而導致在貼合面留下空隙的狀況。 Generally speaking, it is best that the polarizing plate does not have a degree of warpage, but in practice, it is difficult to avoid a polarizing plate having a degree of warpage. According to the embodiment of the present disclosure, the polarizing plate 700/700 '(as shown in FIG. 5) has a direction from the second protective film 300 (pressure-sensitive adhesive layer 400) to the first protective film 200 (surface protective film 600). The warped positive warped shape has a warpage amount. In this way, when the polarizing plate is bonded to the display panel through the pressure-sensitive adhesive layer 400, it is easy to squeeze the polarizing plate from the middle position of the polarizing plate to the sides. Air extrusion does not leave a gap, but can avoid attaching a polarizing plate in the shape of negative warpage (protrusions on the first protective film 200 side) to the display panel. Under the condition of the gap.
綜上所述，雖然本發明已以實施例揭露如上，然其並非用以限定本發明。本發明所屬技術領域中具有通常知識者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾。因此，本發明之保護範圍當視後附之申請專利範圍所界定者為準。 In summary, although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains 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 determined by the scope of the attached patent application.
Claims (8)
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| TW107136248A TWI672533B (en) | 2017-11-16 | 2017-11-16 | Polarizing plate |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130163079A1 (en) * | 2011-12-23 | 2013-06-27 | Wan Taek HONG | Polarizer having high durability and method of fabricating the same |
| TW201631339A (en) * | 2015-02-16 | 2016-09-01 | 三星Sdi 股份有限公司 | Polarizing plate and optical display comprising the same |
| TW201727281A (en) * | 2015-08-10 | 2017-08-01 | 住友化學股份有限公司 | Polarizing plate, image display device, and method for manufacturing polarizing plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130163079A1 (en) * | 2011-12-23 | 2013-06-27 | Wan Taek HONG | Polarizer having high durability and method of fabricating the same |
| TW201631339A (en) * | 2015-02-16 | 2016-09-01 | 三星Sdi 股份有限公司 | Polarizing plate and optical display comprising the same |
| TW201727281A (en) * | 2015-08-10 | 2017-08-01 | 住友化學股份有限公司 | Polarizing plate, image display device, and method for manufacturing polarizing plate |
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