TWI745550B - Manufacturing method of polarizing plate - Google Patents

Abstract

The present invention is to provide a manufacturing method of a polarizing plate capable of manufacturing a polarizing plate in which a direction of an absorption axis is more accurately oriented in a design direction, and a manufacturing method of a liquid crystal panel.

A method of manufacturing a polarizing plate according to one embodiment of the present invention is a method of manufacturing a polarizing plate 1 having an absorption axis S_A, wherein comprising the following steps: a step of cutting the first strip polarizing plate 10 at a plurality of positions in the width direction to obtain a plurality of second strip polarizing plates 12₁ to 12_N (N is an integer of 2 or more) having a width narrower than the width of the first strip polarizing plate; a processing step, wherein by processing each of the second strip polarizing plates, a polarizing plate region 31 of the second strip polarizing plates corresponding to the polarizing plate to be manufactured is removed to obtain the polarizing plate, and on the basis of the direction of the absorption axis in the second strip polarizing plates, the polarizing plate region in which the direction of the absorption axis in the polarizing plate region is oriented to a design direction of the absorption axis in the polarizing plate to be manufactured.

Description

Manufacturing method of polarizing plate

The present invention relates to a method of manufacturing a polarizing plate and a method of manufacturing a liquid crystal panel.

Regarding the polarizing plate, a linear polarizing plate is known, which has an absorption axis and a transmission axis orthogonal to the absorption axis, and absorbs light that vibrates in the direction of the absorption axis and penetrates light that vibrates in the direction of the transmission axis. . Such a polarizing plate is manufactured by cutting a strip-shaped polarizing plate into a predetermined size, for example (see Patent Documents 1 and 2). Here, the strip-shaped polarizer is manufactured, for example, on both sides of a strip-shaped polarizer film or a single-area layer protective film. The strip-shaped polarizer film is usually manufactured by uniaxially stretching a strip-shaped raw material resin film in the longitudinal direction. In such a manufacturing method, the direction of the absorption axis of the strip-shaped polarizer is parallel to the direction in which the raw resin film is stretched in the uniaxial stretching. Furthermore, since the uniaxial stretching of the raw resin film proceeds in the longitudinal direction, it is estimated that the longitudinal direction of the strip-shaped polarizing plate coincides with the absorption axis direction. Therefore, the longitudinal direction of the strip-shaped polarizing plate is used as a reference, and the polarizing plate is manufactured from the strip-shaped polarizing plate in such a way that the absorption axis of the polarizing plate faces a predetermined direction in the polarizing plate. In the past, the polarizing plate manufactured in this way is practical even if it is applied to, for example, a liquid crystal display device.

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 11-231129

[Patent Document 2] Japanese Patent Application Laid-Open No. 11-2724

When manufacturing the polarizing plate by assuming the length direction of the strip-shaped polarizing plate as the direction of the absorption axis, in fact, it is known that the predetermined direction of the absorption axis obtained in the polarizing plate of the product is different from the actual absorption axis direction of the polarizing plate. There may be a slight deviation (for example, about 0.2° to 0.3°). It is believed that such a deviation is due to the deviation between the extension direction of the raw resin film and the length direction of the strip polarizer when the raw resin film is uniaxially stretched in the manufacture of the strip polarizer to be used as a polarizer. Caused by. On the other hand, in recent years, for example, displays for small and medium-sized portable devices, etc., require higher contrast. When the contrast ratio in a display, etc. becomes higher, when the predetermined direction of the absorption axis obtained in the polarizer of the product is slightly shifted from the direction of the absorption axis of the actual polarizer, the image quality may be degraded due to the shift. The fear.

Therefore, the object of the present invention is to provide a method of manufacturing a polarizing plate and a method of manufacturing a liquid crystal panel that can manufacture a polarizing plate whose absorption axis is more accurately oriented toward the design direction.

A method of manufacturing a polarizing plate according to one aspect of the present invention is a method of manufacturing a polarizing plate having an absorption axis. The method includes the following steps: a cutting step is performed by cutting the first strip-shaped polarizing plate at plural positions in the width direction Cut to obtain a plurality of second strip-shaped polarizers with a narrower width than that of the first strip-shaped polarizer; the processing step is to process each second strip-shaped polarizer to correspond to the polarized light to be manufactured The polarizing plate area in the second strip-shaped polarizing plate of the plate is taken out to obtain a polarizing plate, wherein, according to the absorption axis direction in the second strip-shaped polarizing plate, the aforementioned polarizing plate area is the direction of the absorption axis in the polarizing plate area facing the desired direction. The design direction of the absorption axis in the manufactured polarizer.

In this method, the first strip-shaped polarizing plate is cut at plural positions in the width direction to obtain a second strip-shaped polarizing plate having a width narrower than that of the first strip-shaped polarizing plate. Strip-shaped polarizing plate manufactures polarizing plates.

Since the width of each second strip-shaped polarizer is narrower than that of the first strip-shaped polarizer, the width of the absorption axis of each second strip-shaped polarizer in the width direction is smaller than that of the first strip-shaped polarizer. The width of the absorption axis in the width direction. In addition, the polarizing plate is manufactured by processing each second strip-shaped polarizing plate and taking out the above-mentioned polarizing plate area in each second strip-shaped polarizing plate, so that the absorption axis can be manufactured to more accurately face the polarizing plate as a product. The polarizing plate of the required design direction.

In one embodiment, in the above-mentioned cutting step, the first embryo film roll in which the first strip-shaped polarizing plate is wound into a reel shape can be cut at plural positions in the width direction to obtain a plurality of second strip-shaped polarizing plates. A plurality of second strip-shaped polarizers in the state of the second embryonic membrane roll wound into a reel shape.

At this time, the first embryonic membrane roll is cut at plural places in the width direction to obtain the second embryonic membrane roll. Therefore, for example, the step of winding a plurality of second belt-shaped polarizing plates obtained from the first belt-shaped polarizing plate into a reel shape can be omitted, and the second belt-shaped polarizing plate can be released from each of the obtained second embryo film rolls. At the same time, the polarizing plate is manufactured. Thereby, the polarizing plate can be manufactured efficiently.

In one embodiment, the above-mentioned processing step may cut at least one of the plurality of second belt-shaped polarizing plates, and cut out the polarizing plate area from at least one of the second belt-shaped polarizing plates. .

In this case, the polarizing plate can be directly manufactured from at least one second strip-shaped polarizing plate. Therefore, the polarizing plate can be manufactured efficiently.

In one embodiment, the above-mentioned processing step may include: an intermediate cutting step, which cuts out the middle of the polarizing plate including the polarizing plate area from at least one of the plurality of second belt-shaped polarizing plates The intermediate processing step is to process the polarizing plate intermediate cut in the intermediate cutting step, thereby taking out the polarizing plate area from the polarizing plate intermediate.

In this form, a polarizing plate intermediate body is cut out from at least one second strip-shaped polarizing plate, and a polarizing plate is manufactured from the polarizing plate intermediate body.

In the above intermediate processing step, the polarizing plate area can also be cut out from the polarizing plate intermediate by processing the end surface of the polarizing plate intermediate.

Because the polarizing plate area is cut out from the polarizing plate intermediate body, it is easy to correct the length direction of the first strip-shaped polarizing plate due to the influence of bowing when processing the end face of the polarizing plate intermediate body. The direction of the absorption axis is offset by an equal deviation.

In one embodiment, the cutting step is to obtain at least three second strip-shaped polarizing plates from the first strip-shaped polarizing plate.

When at least three second strip-shaped polarizing plates are obtained from the first strip-shaped polarizing plate, the variation in the absorption axis direction in the width direction of each second strip-shaped polarizing plate can be made smaller. Therefore, it is easy to manufacture a polarizing plate whose absorption axis is more accurately oriented in the design direction.

In one embodiment, in the aforementioned cutting step, the direction of the absorption axis in each second strip-shaped polarizing plate to be obtained may be the direction relative to the reference absorption axis in each second strip-shaped polarizing plate. In the method within the allowable range, the first strip-shaped polarizer is cut at plural positions in the width direction based on the axis angle data showing the distribution of the absorption axis in the width direction of the first strip-shaped polarizer.

In this case, the absorption axis directions of the second strip-shaped polarizing plates can be made substantially the same. Therefore, it is easy to manufacture a polarizing plate whose absorption axis is more accurately oriented in the design direction.

In one embodiment, the width of the first strip-shaped polarizing plate may be 1000 mm or more.

When the width of the first strip-shaped polarizing plate is 1000 mm or more, the influence of bowing tends to increase. Therefore, the above-mentioned manufacturing method that can manufacture the polarizing plate with the absorption axis oriented more accurately in the design direction is effective.

In one embodiment, the top view shape of the polarizing plate is rectangular or square, and the length of the diagonal of the polarizing plate can be 350 mm or less, usually 12.5 mm or more, preferably 50 mm or more.

Such polarizing plates tend to be used in small displays requiring high contrast. Therefore, the above-mentioned manufacturing method that can manufacture the polarizing plate with the absorption axis oriented more accurately in the design direction is effective.

In one embodiment, the polarizing plate may be a polarizing plate for a VA type or IPS type liquid crystal panel.

As far as VA-type or IPS-type liquid crystal display devices are concerned, they can display images with high contrast, so there is a tendency to require higher contrast to display images. Therefore, it is effective to obtain the above-mentioned manufacturing method of the polarizing plate in which the direction of the absorption axis is correctly oriented in the design direction.

Regarding the manufacturing method of another aspect of the liquid crystal panel of the present invention, the polarizing plate is manufactured by the manufacturing method of the polarizing plate of one aspect of the present invention, and the obtained polarizing plate is attached to the liquid crystal cell, thereby manufacturing the liquid crystal panel.

The polarizing plate attached to the liquid crystal cell by the above-mentioned manufacturing method of the liquid crystal panel is manufactured by the manufacturing method of the polarizing plate of one aspect of the present invention. Therefore, in the manufactured polarizer, the direction of the absorption axis is more accurately oriented toward the design direction. As a result, in the liquid crystal panel, it is possible to improve the image quality when displaying images.

According to the present invention, it is possible to provide a method of manufacturing a polarizing plate and a method of manufacturing a liquid crystal panel that can manufacture a polarizing plate whose absorption axis is directed to the design direction.

1. 1A‧‧‧ Polarizing plate

2a‧‧‧Polarizer film

2b、2c‧‧‧Protective film

2d‧‧‧Surface protection film

2e‧‧‧Adhesive layer

2f‧‧‧Separation membrane

3‧‧‧LCD Panel

4‧‧‧LCD unit

10‧‧‧The first ribbon polarizer

11‧‧‧The first embryonic membrane volume

12‧‧‧ Ribbon Polarizing Plate

12 ₁ to 12 _N ‧‧‧Second ribbon polarizer

13 ₁ to 13 _N ‧‧‧Second embryonic membrane volume

20、21‧‧‧Cutter

30‧‧‧Intermediate of Polarizing Plate

30a to 30d‧‧‧The end face of the polarizing plate intermediate

31‧‧‧Polarizer area

C‧‧‧Core

S _A ‧‧‧absorption shaft

S _{A_B ‧‧‧reference} absorption axis

S _T ‧‧‧Penetrating shaft

Fig. 1 is a perspective view of a polarizing plate schematically showing the structure of a polarizing plate manufactured by a method of manufacturing a polarizing plate of an embodiment.

Fig. 2 is a schematic diagram of the first strip-shaped polarizing plate used to manufacture the polarizing plate shown in Fig. 1.

Figure 3(a) shows that in the manufacturing method of the polarizing plate, the first embryo film roll formed by the first strip-shaped polarizing plate shown in Figure 2 is cut at plural positions in the width direction to obtain plural pieces The diagram of the steps of the second embryonic membrane volume. Figure 3(b) shows the state in which the first embryonic membrane volume is divided into a plurality of second embryonic membrane volumes by the steps shown in Figure 3(a) figure.

Fig. 4(a) is a schematic diagram showing the step of cutting out the intermediate body of the polarizing plate from the reel of the second belt-shaped polarizing plate lock shown in Fig. 3(b), and Fig. 4(b) It is a diagram schematically showing the polarizing plate intermediate body and the polarizing plate area in the polarizing plate intermediate body cut out in the intermediate cutting step shown in Fig. 4(a).

FIG. 5 is a diagram schematically showing the structure of a liquid crystal panel manufactured by the method of manufacturing a liquid crystal panel of an embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same elements are marked with the same symbols. Repeated descriptions are omitted. The size ratio of the drawing is not necessarily consistent with that of the description. In the description, terms such as "up" and "down" indicate directions based on the expedient terms of the state shown in the schema.

(First Embodiment)

In FIG. 1 schematically represents one embodiment of a polarizing plate having an absorption axis line S _A, the transmission axis orthogonal to the absorption axis of S _T S _A. 1 based polarizing plate having an absorption in the light absorption axis direction of the vibration of S _A, and the optical element selectively passing linearly polarized light penetration characteristics of the vibration direction of the light axis S _T.

The polarizing plate 1 can be applied to, for example, a liquid crystal display device. For example, the polarizing plate 1 is attached to both sides of the liquid crystal cell in a crossed nicols state to form a part of the liquid crystal panel. An example of the planar shape (the shape viewed from the thickness direction) of the polarizing plate 1 is a rectangular or square quadrangular shape as shown in FIG. 1. S _A polarizing plate absorption axis direction of a polarizing plate in a predetermined direction line.

In the predetermined direction of the absorption axis of the polarizing plate 1 S _A, based on application of the polarizing plate of an apparatus (e.g., represented by a liquid crystal device) or the like required in the absorption axis direction S _A, at the design stage of a polarizing plate to the pre-designed design of the absorption axis direction of S _a.

The above-mentioned predetermined direction is a direction with a predetermined angle θ from the reference side with one side of the polarizing plate 1 as a reference side. For example, when the planar shape of the polarizing plate 1 is rectangular, the predetermined direction can be exemplified: when the long side is used as a reference, the predetermined angle θ=0 direction (that is, the direction parallel to the long side), the predetermined angle θ= 45° direction and diagonal direction, etc. In order to simplify the description, unless otherwise stated, the following describes the form of the polarizing plate 1 whose plan view shape is a rectangle and the predetermined direction is the longitudinal direction.

In Fig. 1, the thickness of the polarizing plate 1 is shown to be relatively thick as shown in the figure. However, generally, the thickness of the polarizing plate 1 is very small compared to the length of the long side and the short side of the planar shape of the polarizing plate 1, and the polarizing plate 1 has a film shape.

The size of the polarizing plate 1 can be set according to the device using the polarizing plate 1. An example of the size of the polarizing plate 1 is a polarizing plate with a diagonal length of 12.5 mm to 350 mm, which is equivalent to a so-called length of about 0.5 inches to 12 inches. When the polarizing plate 1 is applied to a liquid crystal display device, the liquid crystal panel to which the polarizing plate 1 is attached is not particularly limited, but examples include: VA (Vertical Alignment) type and IPS (In-Place-Switching) that can display images with high contrast Type of LCD panel, and high-quality LCD panel. A high-quality liquid crystal panel is, for example, a liquid crystal panel with a pixel count of 200 ppi (pixel per inch) or more.

The polarizing plate 1 is a laminated body of a polarizing film 2a having a polarizing layer through which light vibrating in one direction selectively passes. An example of the polarizer film 2a is a film in which a dichroic dye is adsorbed and oriented on a uniaxially stretched resin film. The polarizer film 2a is not particularly limited as long as it is a resin film having linear polarizing properties, and it may be used as long as it can be used for a known linear polarizing plate.

Examples of the resin film of the polarizer film 2a include: polyvinyl alcohol (hereinafter also referred to as "PVA") resin film, polyvinyl acetate resin film, ethylene/vinyl acetate (hereinafter also referred to as In the case of "EVA") resin film, polyamide resin film and polyester resin film. Generally, from the viewpoint of the adsorbability and orientation of the dichroic dye, a PVA-based resin film, particularly a PVA film, can be used. Hereinafter, unless otherwise stated, the resin film possessed by the polarizer film 2a will be described as a PVA film.

The dichroic pigment is oriented and adsorbed on the uniaxially stretched resin film in the direction of its extension. Thereby, the polarizer film 2a has a dichroic property that absorbs light in the orientation direction of the dichroic pigment (that is, the direction of the long axis of the molecule) and transmits light in a direction orthogonal to the orientation direction, that is, , With polarization characteristics. Examples of dichroic pigments are iodine and dichroic organic dyes. An example of the thickness of the polarizer film 2a is 1 μm to 30 μm.

On both sides of the polarizer film 2a, protective films 2b and 2c for protecting the protective layer of the polarizer film 2a are attached. Examples of protective films 2b and 2c include: triacetyl cellulose (triacetyl cellulose, also referred to as "TAC") film, polyethylene terephthalate film, nylon film, polycarbonate film, and polyethylene Film and so on. Generally, TAC films with small optical anisotropy can be used, especially TAC films. An example of the thickness of the protective films 2b, 2c is 10 μm to 200 μm. The protective films 2b and 2c are usually laminated on the polarizer film 2a via an adhesive layer.

The polarizing plate 1 is not limited to the form in which the protective films 2b and 2c are laminated on the polarizer film 2a, as long as the protective film (for example, the protective film 2b) is layered on one area on both sides of the polarizer film 2a.

The surface protective film (or protective film) 2d of the protective film 2b can also be attached to the protective film 2b. An example of the thickness of the surface protection film 2d is 30 μm to 100 μm. Examples of the material of the surface protection film 2d are polyethylene, polypropylene, and polyester.

Furthermore, the adhesive layer 2e may be attached to the protective film 2c, which is used to attach the polarizing plate 1 as a product to other members such as a liquid crystal cell. An example of the thickness of the adhesive layer 2e is 3 μm to 30 μm. Examples of adhesives constituting the adhesive layer 2e include acrylic adhesives, urethane adhesives, and silicone adhesives.

In the form of pasting the adhesive layer 2e, a peelable separation film 2f may be pasted on the adhesive layer 2e. The separation film 2f is a film for preventing other areas and dust of the first strip-shaped polarizing plate 10 from adhering to the adhesive layer 2e until the polarizing plate 1 as a product is used. An example of the thickness of the separation membrane 2f is 30 μm to 100 μm.

The adhesive layer 2e and the separation film 2f are, for example, attached to the protective film 2c on the separation film 2f with the adhesive layer 2e formed on the surface, and are provided on the protective film 2c.

The polarizing plate 1 is manufactured by the first strip-shaped polarizing plate 10 shown in FIG. 2. Fig. 2 is a schematic diagram of the first strip-shaped polarizing plate used to manufacture the polarizing plate shown in Fig. 1.

Examples of the length in the longitudinal direction of the first strip-shaped polarizing plate 10 are 100 m to 3000 m, and the first strip-shaped polarizing plate 10 is wound into a reel shape. The first strip-shaped polarizing plate reel formed by winding the first strip-shaped polarizing plate 10 around the core C of the winding shaft is referred to as the first embryonic film roll 11. An example of the width of the first strip-shaped polarizing plate 10 is 1000 mm or more. Generally, the width of the first strip-shaped polarizing plate 10 is 3000 mm or less.

The first strip-shaped polarizing plate 10 has the same layer structure as the polarizing plate 1 shown in FIG. 1. That is, the first strip-shaped polarizer 10 has a polarizer film 2a, and the two sides of the polarizer film 2a are bonded to form protective films 2b and 2c for protecting the protective layer of the polarizer film 2a. The surface protective film 2d can be attached to the protective film 2b. In addition, the adhesive layer 2e may be formed on the protective film 2c, and the peeled separation film 2f may be pasted on the adhesive layer 2e.

The first strip-shaped polarizing plate 10 is manufactured as follows, for example. The strip-shaped raw resin film is uniaxially stretched in the longitudinal direction (stretching step). An example of the raw resin film is an unstretched, that is, non-oriented PVA film. Examples of stretching magnification are 4 times to 5 times. The uniaxial stretching method can be any one of a dry uniaxial stretching method and a wet uniaxial stretching method. The uniaxial stretching system can be achieved, for example, by bringing the raw resin film into contact with a hot roll while applying tension in the longitudinal direction to stretch the raw resin film.

After the raw resin film is uniaxially stretched, the PVA film of the uniaxially stretched raw resin film is immersed in an aqueous solution containing a dichroic dye (dyeing step). Thereby, the dichroic dye is adsorbed and oriented to the PVA film to dye the PVA film. In this way, the polarizing film 2a is obtained through the stretching step and the dyeing step. Therefore, the above-mentioned stretching step and dyeing step constitute a polarizer film manufacturing step.

Next, the protective films 2b and 2c are respectively attached to both surfaces of the polarizer film 2a (protective film lamination step). Thereafter, corresponding to the layer structure of the manufactured polarizing plate 1, the surface protective film 2 d, the adhesive layer 2 e and the separation film 2 f are laminated, thereby obtaining the first strip-shaped polarizing plate 10.

In the illustrated method of manufacturing the first strip-shaped polarizing plate 10, the dichroic dye is adsorbed and oriented to the PVA film after the raw resin film is uniaxially stretched. However, it is also possible to uniaxially stretch the raw resin film halfway through or after the adsorption orientation of the dichroic dye.

The polarizer film 2 a of the first strip-shaped polarizing plate 10 uniaxially extends in the longitudinal direction of the first strip-shaped polarizing plate 10. Thus, in the first band-shaped polarizing plate 10, the absorption axis direction S _A first system and the longitudinal direction of the belt-shaped polarizing plate 10 substantially matches.

However, when it is stretched uniaxially, the edges in the width direction may be slightly bent on the inside. Therefore, as illustrated in FIG. 2, the strip 1 in the width direction of the first polarizer 10, the case may have an absorption axis shifted from the longitudinal direction S _A direction. Size S from the direction of the longitudinal direction of the absorption axis _A of the offset angle, based for example, about 0.2 ° to 0.3 °. In Figure 2, the offset angle is drawn in an exaggerated manner. Caused by the bowing of the axis direction of the absorbent S _A deviation angle of the longitudinal direction, the strip 1 in the width direction of the first polarizing plate 10 of the system tends to the continuously changed.

Typically, the first strip 10 of the polarizing plate manufacturing step, as described above the detection system of the absorption axis S _A widthwise direction of the offset angle to the longitudinal direction and width direction as an axis of the absorption axis S _A The angle data is obtained. Information system axis angle data in the first polarizing plate 10 with respect to the strip direction is referred to the reference longitudinal direction of the first belt inclination angle _A polarizing plate absorption axis direction of the widthwise direction 10 of S profile.

In such a manner to obtain the S-axis when the absorption axis _A of the angle data, in the production of the first band-shaped polarizing plate 10 having the detecting step to obtain the absorption axis direction of the absorption axis _A of the S-axis of the angle data. This detection step can be performed, for example, after the polarizer film 2a is made, and then the protective films 2b, 2c are attached to the polarizer film 2a; it can also be performed after the protective films 2b, 2c are attached to the polarizer film 2a. Afterwards.

Next, a method of manufacturing the polarizing plate 1 shown in FIG. 1 from the first strip-shaped polarizing plate 10 shown in FIG. 2 will be described.

When manufacturing the polarizing plate 1, as shown in Figure 3(a), the first embryonic membrane roll 11 is cut at plural places in the width direction of the first embryonic membrane roll 11, and as shown in Figure 3(b), the result is obtained Plural second embryonic membrane rolls 13 ₁ , 13 ₂ ,..., 13 _N (N is an integer greater than or equal to 2) (cutting step). In Fig. 3(a), the cutting position of the first embryonic membrane roll 11 is schematically indicated by a two-dot chain line. In Fig. 3(a) and Fig. 3(b), the first embryonic membrane volume 11 is cut at 4 places to obtain five second embryonic membrane volumes 13 ₁ , 13 ₂ , 13 ₃ , 13 ₄ and 13 The form of _5.

For the cutting system of the first embryonic membrane roll 11, for example, the cutting blade 20 (refer to FIG. 3(a)) may be sequentially moved to the cutting position while cutting. Alternatively, the first embryonic membrane roll 11 may be cut at a time by using a plurality of cutting knives 20 arranged to be aligned with the cutting positions. The cutter 20 in Fig. 3(a) is schematically shown, and an example of the cutter 20 is a tip saw.

_{The second embryonic membrane rolls 13 1} , 13 ₂ , ..., 13 _N obtained by the cutting step of cutting the first embryonic membrane roll 11 in the width direction have a width narrower than that of the first ribbon-shaped polarizing plate 10 The second belt-shaped polarizing plate reel is wound by the second belt-shaped polarizing plates 12 ₁ , 12 ₂ , ..., 12 _N. When cutting the first embryonic membrane roll 11, the core C of the shaft when the first strip-shaped polarizing plate 10 is taken up can be cut together, or the core C can be cut without cutting the core C and only the first strip can be cut. Polarizing plate 10. In Fig. 3(b), the illustration of the core C is omitted.

The cutting width when cutting the first embryonic film roll 11 is that the width of the second belt-shaped polarizing plate 12 ₁ to 12 _N that is to be divided from the first embryonic film roll 11 is larger than that of the first belt-shaped polarizing plate 10 more narrow width, and the lines to be manufactured from the second belt 121 _to 123 12 _N polarizer embodiment of a polarizer comprising a polarizing plate to be of a width of the region. The area to be the polarizing plate 1 may be the polarizing plate area 31 described later. The cutting width, that is, the width of the second embryonic membrane roll 13 ₁ to 13 _N , may be different from each other.

S _A direction angle of the absorption axis 11 of the cutting width of the strip line according to the first polarizing plate 10 of a width direction of the first cutting the embryo axis film roll angle data distribution data, so that each strip of the second polarizing plate 12 ₁ through 12 _N in the absorption axis substantially coincides with the direction of the set S _a.

A so-called substantially coincides with the direction of the absorption axis S _A, is intended to refer for example: as in FIG. 3 (b), in each of the second band-like polarizing plate 121 _to 123 12 _N with respect to the absorption axis of the reference S _A (hereinafter also referred to as a reference the absorption axis S _{A_B)} direction, the angle of the absorption axis direction S _a distribution is within an allowable range. The above-mentioned allowable range may be determined according to the polarizing plate 1 to be manufactured, but for example, it is about ±0.1° _{with respect to the reference absorption axis S A_B.}

For example, a first cutting the film roll 11 embryo, may be set to a reference direction in the absorption axis direction of the absorber _{A_B} S of the polarizing plate of the first strip 10 of a width direction of a plurality of predetermined positions of the shaft S _A, S absorption axis _{The width of the variation angle of the A} direction relative to the reference absorption axis S _{A_B} direction is the width of the area within the allowable range, and this width can be set as the cutting width.

The cutting width of the first embryonic film roll 11 is as described above, so that the polarizing plate ₁ can be manufactured from the second strip-shaped polarizing plates 121 to 12 _N including the width of the area to be the polarizing plate 1, so the reference absorption is set The distance between the adjacent predetermined positions among the plurality of predetermined positions in the axis S _{A_B} direction is the width direction size of the first embryonic film roll 11 of the polarizing plate area 31 described later (the polarizing plate area 31 is projected to the width direction). Length) above.

Obtaining a plurality of the second roll of film after embryo _13₁ to 13 _N, processing step of the second line constituting the second belt Embryo polarizing plate film roll _13₁ to 13 _N 12 _N of 121 _to 123 for processing, as manufactured The product of the polarizing plate 1. In relation to the processing steps, the second line to the embryo for producing a polarizing plate film roll ₁₃₁ from the case of Example 1 will be described.

As in FIG. 4 (a), from the second embryo release film roll ₁₃₁ of the second band-like polarizing plate _121, the polarizing plate was cut out of Intermediate 30 (Intermediate cutout step). Intermediate-based polarizing plate 30 while the second band-like polarizing plate ₁₂₁ toward the release direction (longitudinal direction) of the conveyance, while the second band in accordance with the size of the polarizing plate ₁₂₁ for manufacturing the polarizing plate 1, the second belt predetermined position in the longitudinal direction of the polarizer ₁₂₁ to the cutting blade 21 cut out.

As long as the polarizing plate intermediate 30 is schematically indicated by a dotted line in Figure 4(b), the size of the polarizing plate area 31 corresponding to the product size of the polarizing plate 1 may be included, and it may include the end surface processing described later The size of the cutting residual material.

After that, an intermediate processing step is performed, which is to process the polarizing plate intermediate 30 and take out the polarizing plate area 31 to obtain the polarizing plate 1. Taking out the polarizing plate area 31 from the polarizing plate intermediate body 30 means separating or cutting off the area other than the polarizing plate area 31 in the polarizing plate intermediate body 30 from the polarizing plate area 31.

Hereinafter, an end face processing step, which is an example of an intermediate processing step, will be described. In the end surface processing step, the end surfaces 30a, 30b, 30c, 30d of the polarizing plate intermediate 30 are processed (end surface processing), and the polarizing plate area 31 is cut out from the polarizing plate intermediate 30 to obtain a polarizing plate of product size 1. An example of the end face processing is a cutting process in which the end faces 30a to 30d are cut, and the cutting process also includes a grinding process in which the end faces 30a to 30d are ground.

Based polarizing plate 31 in the region S _A direction of the absorption axis of the polarizer 31 to become the region of the polarizing plate 1 in the design direction of the absorption axis S _A (predetermined direction) of the mode setting. Thus, for example, like the second belt-like polarizing plate _121, S _A absorption axis direction (the direction of FIG. 4 (b) shown in the one-dot chain line) with respect to the longitudinal direction of the second polarizing plate ₁₂₁ to the strip When inclined at a certain angle, as shown in FIG. 4(b), the polarizing plate region 31 is also inclined with respect to the longitudinal direction of the polarizing plate intermediate body 30. Thus, the width of the second polarizing plate ₁₂₁ of the strip than at least the width of the region 31 of the polarizing plate (In Fig. 4 (a) for the short-side direction) is longer.

Region for setting the absorption axis of the polarizing plate using the S _A 31, S _A is the absorption axis of the second belt ₁₂₁ of the polarizing plate, for example, reference may be absorbed in the polarizing plate ₁₂₁ of the second belt The direction of axis S _{A_B.} As described above, the second roll of film ₁₃₁ based embryo axis angle based on the embryo from the first film roll 11 to the first strip 10 of a width direction of the polarizer absorption axis of the data S _A, S _A to the absorption axis direction of the same substantive The way is cut and made. Thus, for setting the direction of the absorption axis S _A 31 of the polarizing plate used in the known region.

In the end face processing step of processing the end faces 30a to 30d of the polarizing plate intermediate body 30, the end faces 30a to 30d of the polarizing plate intermediate body 30 are cut or ground by a cutter to cut out the polarized light from the polarizing plate intermediate body 30. The plate area 31 is obtained, and the polarizing plate 1 as a product is obtained. In the end surface processing step, for example, a laminate formed by laminating a plurality of polarizing plate intermediate bodies 30 may be used to perform end surface processing of a plurality of polarizing plate intermediate bodies 30 at one time.

Although the method of manufacturing the polarizing plate 1 from the second embryonic membrane roll 13 ₁ is described, the same applies when manufacturing the polarizing plate 1 _{from the other second embryonic membrane rolls 13 2} , 13 ₃ , ..., 13 _N. Embryos from each of the second polarizing plate film roll _13₁ to 13 _N manufacture of a size and shape may be different. Therefore, the cutting width when dividing the second embryonic membrane roll 13 ₁ to 13 _N from the first embryonic membrane roll 11 is based on the size and shape of the polarizing plate 1 manufactured from the second embryonic membrane roll 13 ₁ to 13 _{N, and} first band polarizing plate absorption axis of shaft angle data S _a 10 in the set.

10, as illustrated in FIG. 2 constituting the first film roll Embryo polarizer 11 of the first belt, the distribution is generated based the absorption axis direction of the S _A in the width direction due to the effect of the bow. For example, the central portion in the width direction 10 of the first band-shaped polarizing plate, the absorption axis direction S _A line substantially parallel to the longitudinal direction of the belt-shaped polarizing plate 10, on the other hand, in the vicinity of the edge portions, with respect to the line The longitudinal direction of the first strip-shaped polarizing plate 10 is slightly shifted (for example, 0.2° to 0.3°).

In the above-mentioned manufacturing method, the first embryonic film roll 11 is cut at plural places in the width direction to produce the second strip-shaped polarizing plate 12 ₁ to 12 having a width narrower than that of the first strip-shaped polarizing plate 10 12 _N. Further manner, based on the respective S _A direction of the absorption axis of the second polarizing plate strip 121 _to 123 in the 12 _N, S _A to the absorption axis direction toward a predetermined direction of the polarizer of article 1 of the desired (design) of the polarizing plate manufactured 1.

Because the width of the second belt polarizer 12 _N 121 _to 123 of the first belt is narrower than the width of the polarizing plate 10, so that a smaller change in direction _A each second belt 12 _N polarizer 121 _to 123 of the absorption axis S. Further, each of the second belt-based polarizer 121 _to 123 according to respective 12 _N S _A direction of the absorption axis of the polarizing plate 1 is manufactured from, so that the absorption axis S _A can be produced more accurately as the polarization direction with respect to the article the plate as claimed absorbing polarizer predetermined direction of the axis S _a 1.

The above-described manufacturing method illustrated in the axis line direction of the angle data based on the width of the first strip 10 of the polarizing plate absorption axis set S _A of the width of the cut sheet is cut into sections 11 of a first film roll embryos. Specifically, the axis angle data with respect to the width of the cut complex amplitude fluctuation direction of the absorption axis _A S S _{A_B} a reference absorption axis direction is set to be within an allowable range. Thus, each of the second belt easily polarizing plate 121 _to substantially coincide with the absorption axis in the direction _N S _A. Thus, manufacturing is easy absorption axis S _A higher accuracy of the polarizing plate 1 toward a predetermined direction.

The second belt-shaped polarizing plate 12 ₁ to 12 _N is formed by cutting the first embryonic membrane roll 11 into sections to produce the second belt-shaped polarizing plate 12 ₁ to 12 _N in the wound state of the second embryonic membrane roll 13 ₁ To 13 _{N. Therefore, the polarizing plate 1} can be manufactured using the second embryo film rolls 13 ₁ to 13 _N without going through the step of rewinding the second strip-shaped polarizing plates 121 to 12 _N into a reel shape. Therefore, the polarizing plate 1 can be manufactured more efficiently. Furthermore, nor need the second belt 121 _to 123 12 _N polarizer rewound again into a scroll shape of the device or the like, so that the manufacturing costs can be reduced of a polarizing plate.

In the above manufacturing method, cut out from a polarizing plate polarizing plate 1 of Intermediate 30, lines 31 to the polarizing plate absorption axis region S _A polarizing plate area set toward the polarizing plate 31 of an embodiment of the design direction of the absorption axis of the S _A . Accordingly, the correction can be more reliably absorbed by the bowing caused by the shift in the direction of axis S _A first belt 10 of the longitudinal direction of the polarizing plate. As a result, manufacturability of the absorption axis _A and the direction of S as required by the product of the polarizer absorption axis _A in a predetermined direction offset S of the polarizing plate 11 smaller.

Can be applied to high-contrast image display polarizing plate of the formula VA and IPS-type liquid crystal panel of 1, in order to display an image with high contrast, and is gradually S _A required absorption axis direction of the polarizer Design direction (predetermined direction) Consistent with high precision. Therefore, the absorption axis can be manufactured more accurately S _A direction coincides with the direction of the design method of producing the above-described polarizing plate, the polarizing plate to a liquid crystal panel for the manufacture of VA-type and IPS-type in terms of a system is valid. When the liquid crystal panel is a VA type, it may also be an ASV (Advanced SuperView) type.

Likewise, the polarizing plate applied to the liquid crystal panel can display high-quality images, the system requires the absorption axis direction S _A polarizing plate with a predetermined direction of the article 1 with high precision required for the same. Therefore, the absorption axis can be manufactured more accurately S _A direction consistent with the direction of the polarizer design in this manufacturing method, it may be used in the manufacture of high-quality image display polarizing plate of the liquid crystal panel used in the system is valid in terms of .

Different from large-scale TVs with larger screen sizes, for small and medium-sized portable devices below 12 inches (350mm diagonal), because users tend to watch the screen from a closer distance, Higher contrast is required. Accordingly, the above-described manufacturing method more accurately coincides with the design direction of the axis of polarizing plate 1 S _A direction making an absorbent, to a machine for manufacturing sized portable monitor used with a polarizing plate in terms of lines is valid.

The top view shape of the polarizer 1 is rectangular or square, and the diagonal length is 12.5mm to 350mm, so-called 0.5 inches to 12 inches or so, or even corresponding to the length of 2 inches (diagonal length 50mm) or more In the form, the polarizing plate 1 is easy to be used in displays for small and medium-sized portable devices, and the like. Therefore, the absorption axis may be manufactured S _A method for producing the above-described direction can be more correctly coincides with the direction of the polarizer design, for rectangular or square planar shape and a length of 350mm diagonal terms of lines to the polarizer 12.5mm Is valid.

In the form where the width of the first strip-shaped polarizing plate 10 is 1000 mm or more, the aforementioned bowing tends to increase. Thus, a polarizing plate 10 is manufactured, the absorption axis direction of the S _A from long width is more than 1000mm, typically 3000mm or less of the first polarizing plate strip can be more correctly coincides with the direction of the design lines of the polarizing plate production method 1 Is valid.

(Second Embodiment)

The second embodiment describes a method of manufacturing a liquid crystal panel using the polarizing plate 1. Hereinafter, for convenience of description, in the polarizing plate 1 of the layer structure shown in FIG. 1, the polarizing plate 1 from which the separation film 2f is peeled off is also referred to as the polarizing plate 1A.

As shown schematically in FIG. 5, the liquid crystal panel 3 is formed by bonding the polarizing plate 1A after peeling off the separation film 2f from the polarizing plate 1 on both sides of the liquid crystal cell 4, and the liquid crystal panel 3 is comprised. The liquid crystal cell 4 may be any one that can be used in a known liquid crystal panel. For example, the liquid crystal cell 4 may be one in which a transparent electrode, an alignment film, a liquid crystal, an alignment film, a transparent electrode, a color filter, and a glass substrate are sequentially provided on a glass substrate. Examples of the driving method of the liquid crystal cell 4 are the VA type and the IPS type. An example of the number of pixels of the liquid crystal cell 4 is 100 ppi or more.

The liquid crystal panel 3 is manufactured in the following manner, for example. That is, the polarizing plate 1 is manufactured by the manufacturing method of the polarizing plate described in the first embodiment (polarizing plate manufacturing step). Next, polarizing plates 1 are bonded to both sides of the liquid crystal cell 4 to obtain a liquid crystal panel 3 (polarizing plate bonding step).

In the polarizing plate bonding step, the separation film 2f of each polarizing plate 1 is peeled off, and the polarizing plate 1A after the separation film 2f is peeled off is bonded to the liquid crystal cell 4 via the adhesive layer 2e. When the polarizing plates 1 are bonded to both sides of the liquid crystal cell 4, the two polarizing plates 1A are bonded to the liquid crystal cell 4 so that the two polarizing plates 1 are in a cross-polarized state.

In the manufacturing method of the above-mentioned liquid crystal panel 3, the polarizing plate 1 which becomes the polarizing plate 1A which the liquid crystal panel 3 has is manufactured by the manufacturing method exemplified in the first embodiment. Therefore, in a polarizing plate, the absorption axis S _A more accurately toward a predetermined direction of the absorption axis S _A liquid crystal panel of claim 3. Therefore, in the manufactured liquid crystal panel 3, the image quality can be improved when displaying images.

Furthermore, when the liquid crystal cell 4 used in the manufacture of the liquid crystal panel 3 is any one of the VA type and the IPS type, an image can be displayed with high contrast. Thus, by the application direction of the absorption axis S _A more accurate claim 3 toward the liquid crystal panel polarization plate. 1A the predetermined direction, to the liquid crystal panel 3, it is possible to further enhance the quality of seeking. Similarly, when the number of pixels of the liquid crystal cell 4 is 200 ppi or more, a high-quality image can be displayed. Thus, by the application direction of the absorption axis S _A more accurate claim 3 toward the liquid crystal panel polarization plate. 1A the predetermined direction, in terms of the liquid crystal panel 3, it is possible to further enhance the quality of seeking.

The polarizing plate 1 manufactured by the manufacturing method of the polarizing plate described in the first embodiment only needs to have at least one of the polarizing film 2a and the protective films 2b and 2c. However, in general, the polarizing plate 1 has an adhesive layer 2e in order to be bonded to the liquid crystal cell 4. When the polarizing plate 1 manufactured by the method of manufacturing the polarizing plate described in the first embodiment does not have the adhesive layer 2e, the polarizing plate 1 and the liquid crystal cell 4 may be bonded together with an adhesive, or in the liquid crystal cell 4 An adhesive layer is provided on the side.

The above is a description of various embodiments of the present invention, but it is not limited to the various embodiments illustrated, but is meant according to the scope of the patent application, and includes various changes within the meaning and scope equivalent to the scope of the patent application.

For example, in the manufacturing method of the polarizing plate 1 exemplified in the first embodiment, the polarizing plate intermediate body 30 is subjected to end surface processing to manufacture the polarizing plate 1 as a product. However, may be taken directly to 121 _to 123 12 _N or deleted separating strip polarizing plate other than the second region 31 and the polarizing plate polarizing region 31 from the region. For example, the polarizing plate of the second belt 121 _to 123 12 _N from the second embodiment cut strip polarizer 121 _to 123 directly polarizer 12 _N region 31 of the cutting process. When performing such cutting processing, examples of cutting processing methods include punching using a die and laser cutting using laser light.

In the intermediate cutting step of the step when the polarizing plate 1 is taken out from the polarizing plate intermediate 30, it is not limited to end surface processing using cutting (including grinding processing), and punching using a die and laser Laser cutting of light. Further, from the second belt _13₁ to 13 _N polarizing plate cut out of a polarizing plate 30 is an intermediate step, for example, may use laser cutting.

A method for producing a polarizing plate of the polarizing plate from the second band 121 _to 123 12 _N, the total of the second belt 12 _N polarizer 121 _to 123, it may be not the same. For example, from at least one of the second belt of the second belt polarizer polarizing plate 121 _to 123 12 _N polarizing plate cut out region 31 directly produced polarizing plate 1, on the other hand, the second strip from the polarizer ₁₂₁ After _{the remaining second strip-shaped polarizing plate in 12 N} has been produced the polarizing plate intermediate 30, the polarizing plate 1 can be taken out from the polarizing plate intermediate 30.

For example, in the central portion of the first strip 10 in the width direction of the polarizing plate, the absorption axis direction S _A substantially longitudinal direction. Therefore, the width of the second strip-shaped polarizing plate cut out from the center portion in the width direction of the first strip-shaped polarizing plate 10 can be the same as the width of the polarizing plate region 31.

In this case, the plurality of second band-shaped polarizing plate 121 _to 123 12 _N polarizing plate obtained by processing of the processing step 1, the plurality of second band-shaped polarizing plate among the 121 _to 123 12 _N, for at least the The second strip-shaped polarizing plate of the same width of the polarizing plate area 31 is made by cutting the second strip-shaped polarizing plate with the length of the longitudinal direction of the polarizing plate area 31 in the second strip-shaped polarizing plate to manufacture the polarizing plate 1. Among the other plurality of second strip-shaped polarizing plates 12 ₁ to 12 _N , for the second strip-shaped polarizing plate having a width longer than the width of the polarizing plate region 31, as long as the method exemplified so far starts from the second strip What is necessary is just to manufacture the polarizing plate 1 like a polarizing plate.

In the second strip region polarizing plate polarizing plate ₁₂₁ is set to a width direction 31 is not limited to the 12 _N a. In the second strip widthwise polarizer 12 _N of 121 _to 123 can be set to a plurality of polarizing regions 31.

In Figure 3 (a) and Figure 3 (b), the first embryonic membrane volume 11 is divided into five second embryonic membrane volumes 13 ₁ to 13 ₅ , but the number of second embryonic membrane volume It is not limited to five (that is, N=5). What is necessary is just to make a plurality of second embryonic membrane rolls with a width narrower than that of the first embryonic membrane roll 11 from the first embryonic membrane roll 11. For example, in the width direction of the first embryonic membrane roll 11, the first embryonic membrane roll 11 is cut with a certain cutting width from the two edges, so that the first embryonic membrane roll 11 is made in the width direction of the first embryonic membrane roll. Two second embryonic membrane volumes near the two edges, and a second embryonic membrane volume between them. At this time, three second embryonic membrane volumes were made from one first embryonic membrane volume 11.

As shown schematically in FIG. 2, in the width direction of the first strip-shaped polarizing plate 10, the influence of bowing is greater in the vicinity of the two edges than in the vicinity of the center. Thus, in the offset direction in the vicinity of the absorption axis S _A S _A of the absorption axis direction in the vicinity of the central portion of the first belt 10 in the width direction of the polarizing plate and two edge portions becomes large.

However, amplitude variation of the absorption axis _A direction S in the vicinity of the central portion and the variation range of the absorption axis _A direction S in the vicinity of the two edge portions are smaller. Therefore, if the first strip-shaped polarizing plate 10 is divided in the width direction into three second strip-shaped polarizing plates in the vicinity of the two edges and near the center part, it is possible to obtain 3 small changes in the absorption axis direction in the width direction. A second strip polarizer.

The greater the number of the second strip-shaped polarizing plates divided from the first strip-shaped polarizing plate 10, that is, the more cuts in the width direction of the first strip-shaped polarizing plate 10, the more the absorption axis direction can be obtained. The same second strip polarizer. From this viewpoint, the number of second strip-shaped polarizing plates is preferably five or more.

10 is obtained from the first plurality of strip-like polarizing plate when the polarizing plate of the second belt 121 _to 123 12 _N, the first line 11 embryos are cut into segments film roll sheet obtained by the second roll of film embryo _13₁ to 13 _N. However, the first strip-shaped polarizing plate 10 may be released from the first embryonic membrane roll 11, and the first strip-shaped polarizing plate 10 may be cut into long strips at plural positions in the width direction of the first strip-shaped polarizing plate 10, and A plurality of second strip-shaped polarizing plates 12 ₁ to 12 _{N are obtained} .

At this time, usually obtained from the second belt 121 _to 123 12 _N polarizing plate re-wound into roll form to prepare the second roll of film embryo _13₁ to 13 _N. When the second embryonic membrane rolls 13 ₁ to 13 _N are produced as described above, the steps after making the second embryonic membrane rolls 13 ₁ to 13 _N are the same as the subsequent steps described using Fig. 4(a).

Decision absorbent polarizing plate 31 is used to set the region of the axial direction S _A, based not limited to, for example, according to the first belt polarizing axis by the angle data of the S _A shaft 10 is absorbed, the polarizing plate may be detected as an intermediate the absorption axis direction 30 of the S _a, and depending on the direction of the detection result. Alternatively, the distribution may be determined according to the direction of the absorption axis _A S on the rule of thumb in the polarizing plate 10 of the first strip.

When the polarizing plate of each second belt 121 _to 123 12 _N polarizing plate 1 which is manufactured, for example, may be a polarizing plate cut out of Intermediate 30, the polarizing plate from each of the second intermediate strip polarizer 121 _to 123 12 _N 30 is processed to manufacture the polarizing plate 1.

The first polarizing plate 1 is divided into a plurality of strip-like second belt 10 when the polarizer 121 _to 123 12 _N, which may not be based on the width of the cutting angle of the shaft axis S _A in the direction of the first belt 10 absorbs the polarizing plate data . By dividing the first strip-shaped polarizing plate 10 into a plurality of second strip-shaped polarizing plates 12 ₁ to 12 _N , the width of the absorption axis S _A direction of the width direction of each of the second strip-shaped polarizing plates 12 ₁ to 12 _N S _a is less than the variation width direction of the absorption axis 10 of the first band-shaped polarizing plate, so that the absorption axis may be manufactured with higher precision S _a toward the desired direction of the polarizing plate 1.

In this case, manufacturing the first belt polarizing plate 10 may not detect the absorption axis of the shaft of the angle data S _A. Further, the second band-shaped polarizing plate manufactured from 121 _to 123. 1 12 _N when the polarizing plate, the absorption axis direction can be detected based S _A 12 _N 121 _to 123 of the second belt polarizing plate, and a polarizing plate using the detection result as the absorption axis direction 31 of the region S _a.

The planar shape of the polarizing plate 1 is a quadrangular shape such as a rectangle or a square, but is not limited to a quadrangular shape, and may be a circular shape.

The example of the driving method of the liquid crystal panel to which the polarizing plate 1 is applied is not limited to the case of the VA type and the IPS type. For example, the driving method of the liquid crystal panel to which the polarizing plate 1 is applied may also be a TN (Twisted Nematic) method.

10‧‧‧The first ribbon polarizer

11‧‧‧The first embryonic membrane volume

12 ₁ to 12 ₅ ‧‧‧Second strip polarizer

13 ₁ to 13 ₅ ‧‧‧Second embryonic membrane volume

20‧‧‧Cutter

C‧‧‧Core

S _A ‧‧‧absorption shaft

S _{A_B ‧‧‧reference} absorption axis

Claims (10)

A method of manufacturing a polarizing plate is a method of manufacturing a polarizing plate with an absorption axis, which includes the following steps: a cutting step, cutting the first strip-shaped polarizing plate at plural positions in the width direction to obtain plural pieces with A second strip-shaped polarizing plate with a narrower width than the width of the first strip-shaped polarizing plate; the processing step is to process each of the second strip-shaped polarizing plates so that the second strip-shaped polarizing plate corresponds to the polarizing plate to be manufactured. The polarizing plate area in the strip polarizing plate is taken out to obtain a polarizing plate, wherein, according to the direction of the absorption axis in the second strip polarizing plate, the polarizing plate area is the direction of the absorption axis in the polarizing plate area to be manufactured The design direction of the absorption axis in the polarizing plate; and the foregoing processing step has the following steps: the intermediate cutting step is to cut from at least one of the plurality of second belt-shaped polarizing plates mentioned above The polarizing plate intermediate containing the aforementioned polarizing plate area is produced; the intermediate processing step is to process the aforementioned polarizing plate intermediate cut out in the aforementioned intermediate cutting step, thereby taking out the aforementioned polarizing plate from the aforementioned polarizing plate intermediate area. The manufacturing method of the polarizing plate described in the first item of the scope of patent application, wherein, in the cutting step, the first embryonic film of the first strip-shaped polarizing plate is wound into a reel at plural positions in the width direction Cutting is performed to obtain a plurality of second strip-shaped polarizing plates in a state where a plurality of second strip-shaped polarizing plates are respectively wound into a reel-shaped second embryo film roll. The method for manufacturing a polarizing plate as described in item 1 or 2 of the scope of patent application, wherein in the aforementioned processing step, at least one of the plurality of second belt-shaped polarizing plates is cut and processed , And cut out the aforementioned polarizing plate area from the aforementioned at least one second strip-shaped polarizing plate. The manufacturing method of the polarizing plate described in item 1 or 2 of the scope of the patent application, wherein, in the intermediate processing step, the end surface of the polarizing plate intermediate is processed to cut out the polarizing plate intermediate Polarizer area. The method for manufacturing a polarizing plate according to the first or second patent application, wherein in the cutting step, at least three of the second belt-shaped polarizing plate are obtained from the first belt-shaped polarizing plate. The method of manufacturing a polarizing plate described in the first or second scope of the patent application, wherein, in the cutting step, the direction of the absorption axis of each of the second strip-shaped polarizing plates to be obtained is relative to each of the aforementioned The direction of the reference absorption axis in the second strip-shaped polarizer is within the allowable range, and the first strip-shaped polarizer is converted to the first strip-shaped polarizer based on the axis angle data showing the distribution of the absorption axis in the width direction of the first strip-shaped polarizer. The board is cut at plural places in the width direction. According to the method of manufacturing a polarizing plate described in item 1 or 2 of the scope of the patent application, the width of the first strip-shaped polarizing plate is 1000 mm or more. According to the method for manufacturing a polarizing plate described in item 1 or 2 of the scope of patent application, the plan view shape of the polarizing plate is rectangular or square, and the diagonal length of the polarizing plate is 350 mm or less. Such as the manufacturing method of the polarizing plate described in item 1 or 2 of the scope of patent application, Among them, the aforementioned polarizing plate is a polarizing plate for a VA-type or IPS-type liquid crystal panel. A method for manufacturing a liquid crystal panel. The polarizing plate is manufactured by the manufacturing method of the polarizing plate described in any one of the 1 to 9 patents, and the obtained polarizing plate is attached to the liquid crystal cell to manufacture the liquid crystal panel.

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