JPH11248938A - Manufacture of reflective polarizer and manufacture of liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflective polarizer manufacturing method capable of cutting a multi-layered laminate material without causing any layer peeling and to provide a liquid crystal display device manufacturing method using the reflecting polarizer manufactured by the method. SOLUTION: When this reflective polarizer to be user for the liquid crystal display device is cut out of a flexible large-sized multi-layered laminate material 200, a belt blade 7 whose edge part 71 extends obliquely and linearly is used. The edge part 71 is lowered obliquely to the multi-layered laminate material 200. During this period, the multi-layered laminate material 200 is mounted on a base 8 having a silt 81 that the edge part 71 intrudes formed in a grating shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a reflective polarizer by cutting out a large-sized multilayer laminate, and a method for manufacturing a liquid crystal display using the reflective polarizer. More specifically, the present invention relates to a cutting technique for a multilayer laminate.

[0002]

2. Description of the Related Art FIGS. 1 and 2 are a longitudinal sectional view showing a structure of a liquid crystal display device and a schematic configuration diagram of a reflective polarizer, respectively.

A liquid crystal panel 100 is used in the liquid crystal display device 1 shown in FIG. 1, and the liquid crystal panel 100 includes a first transparent substrate 10 made of a flexible transparent plastic film or glass, and It also has a second transparent substrate 20 formed of a transparent plastic film or glass having flexibility. A sealant 30 is formed on one of these transparent substrates by printing or the like, and a predetermined gap (cell gap 3) is formed between the first transparent substrate 10 and the second transparent substrate 20 with the sealant 30 interposed therebetween.
1) is adhered and fixed. The gap dimension of the cell gap 31 depends on the first transparent substrate 10 and the second transparent substrate 20.
Are defined by a spacer 32 interposed between the two. Between the first transparent substrate 10 and the second transparent substrate 20, a liquid crystal enclosing region 30 defined by a sealant 30.
Liquid crystal LC is sealed in 0. First transparent substrate 1
An alignment film 101 is provided on both the 0 and the second transparent substrates 20.
201 is formed, and the liquid crystal LC is subjected to STN (Super T
(Wisted Nematic) method.

The second transparent substrate 20 is a first transparent substrate 10
Since the second transparent substrate 20 is larger than the first transparent substrate 20, a part of the second transparent substrate 20 protrudes from the edge of the first transparent substrate 10, and a large number of electrodes 110 are formed on the protruding portion. These electrodes 110 include an anisotropic conductive film ACF (Anis)
otropic conductive film)
The terminals 210 of the flexible wiring board 2 are connected to each other via the. Further, at the other end of the flexible wiring board 2, the terminal 220 has a driving IC 60
Is connected. On the inner surface of the first transparent substrate 10, for example, an ITO film (Indium Tin Ox) is formed.
ide), a plurality of transparent striped electrodes 105 extending in the horizontal direction are formed, and a plurality of transparent striped electrodes 205 extending in the vertical direction are formed on the inner surface of the second transparent substrate 20 by the ITO film. Have been. Pixels are formed at the intersections of these striped electrodes 105 and 205. Therefore, when a driving signal is input from the driving IC 60 to the liquid crystal panel 100 via the flexible wiring board 2 in the liquid crystal display device 1, a voltage is applied to the stripe electrodes 105 and 205 corresponding to the driving signal. Therefore, since the alignment state of the liquid crystal LC in each pixel can be controlled, a desired image can be displayed on the liquid crystal display device 1.

[0005] A rectangular polarizer 102 is attached to the outer surface of the first transparent substrate 10. Further, the second transparent substrate 2
A rectangular reflective polarizer 202 is attached to the outer surface of the zero. As described with reference to FIG. 2, since the reflective polarizer 202 has both the function of the polarizer and the function of the reflector, in the liquid crystal display device 1, the light enters from the first transparent substrate 10. The reflected light is reflected by the reflective polarizer 202 and can be used for display, and there is no need to provide a backlight.

[0006] As shown in FIG.
Among two directions orthogonal to each other in the in-plane direction, a structure in which two types of layers (A layer and B layer) having substantially the same refractive index in one direction and different refractive indexes in the other direction are alternately laminated. Have. That is, when the directions orthogonal to each other are set to the X direction, the Y direction, and the Z direction, respectively, in the reflective polarizer 202, the refractive index (n _AX ) of the A layer in the X axis direction and the refractive index of the B layer in the X axis direction Although different from the refractive index (n _BX ), the refractive index of the layer A in the Y-axis direction (n _AY ) and the refractive index of the layer B in the Y-axis direction (n _BY ) are substantially equal. Accordingly, among the light incident on the reflective polarizer 202, the linearly polarized light in the Y-axis direction transmits through the reflective polarizer 202 because the refractive indices of the A layer and the B layer in the reflective polarizer 202 are substantially equal. I do. The reflective polarizer 202, the thickness of the Z-axis direction in the A layer t _A, the thickness of the B layer and t _B, is set to be _{t A · n AX + t B} · n BX = λ / 2 ing. For this reason, the reflection polarizer 2
Of the light having the wavelength λ incident on the light source 02, the linearly polarized light in the X-axis direction is reflected by the reflective polarizer 202. Since the thickness of the layer A in the Z-axis direction and the thickness of the layer B in the Z-axis direction are variously changed, the reflection polarizer 20
Numeral 2 reflects linearly polarized light in the X-axis direction among light incident over a wide range of the visible wavelength region. For example, polyethylene naphthalate (PEN; polyethylene) is provided on the layer A of the reflective polarizer 202 thus configured.
Ne naphthalate is stretched, and the layer B is used as a copolyester (coPEN; copolyene) of naphthalene dicarboxylic acid and terephthalic acid.
star of naphthalene dicar
boxy acid and telephth
allic or isophthalic aci
d) can be used. Therefore, the reflective polarizer 202
Is a flexible substrate. Of course, the material of the reflective polarizer 202 used in the present invention is not limited to this, and the material can be appropriately selected. The details of such a reflective polarizer 202 are disclosed in JP-A-9-506985 as a reflective polarizer.

[0007] As shown in FIG. 3, such a reflective polarizer 202 is manufactured by cutting a large-sized multilayer laminated material 200 to a predetermined size along a cutting line 203. . Multilayer laminate material 20
0 is also a flexible substrate. In this cutting process,
Conventionally, as shown in FIGS. 8 (A) and 8 (B), the blade 71A of the band blade 7A is oriented parallel to the multilayer laminated material 200, and from this state, the band blade 7A is cut along the cutting line of the multilayer laminated material 200. By lowering it toward 203, the multilayer laminate 200 is cut, and the reflective polarizer 202 is cut out into a rectangular shape.

[0008]

However, like the reflective polarizer 202, the multilayer laminate 200 is a flexible substrate having a plurality of laminated layers.
When cutting is performed by the methods shown in (A) and (B), there is a problem that the layers (A layer and B layer) are easily peeled off at the cut surface. Therefore, conventionally, the yield of the reflective polarizer 202 is low, and if the reflective polarizer 202 is adhered to the liquid crystal panel 100 without detecting the peeling of the layer, the yield as the liquid crystal panel 100 also decreases. .

Accordingly, an object of the present invention is to provide a method for manufacturing a reflective polarizer capable of cutting a multilayer laminate material without causing peeling of a layer at a cut surface, and a liquid crystal using the reflective polarizer manufactured by this method. An object of the present invention is to provide a method for manufacturing a display device.

[0010]

In order to solve the above problems, according to the present invention, the refractive indices in one of two directions orthogonal to each other in the in-plane direction are substantially equal to each other, and the refractive indices in the other direction are different from each other. A manufacturing method for cutting a reflective polarizer made of a multilayer laminate material in which two types of layers different from each other are alternately laminated, wherein a blade portion of a cutting blade is substantially obliquely inserted into the multilayer laminate material. The multi-layer laminate is cut.

Further, according to the present invention, a reflected polarized light made of a large-sized multilayer laminate material capable of reflecting light of a linearly polarized light component in a predetermined direction and transmitting light of a linearly polarized light component in a direction orthogonal to the predetermined direction. A manufacturing method for cutting a child,
The cutting of the multilayer laminated material is performed by causing a blade portion of a cutting blade to enter substantially obliquely with respect to the multilayer laminated material.

In the present invention, the term "substantially" of "making the blade portion of the cutting blade substantially obliquely enter the multilayer laminate material" means that the blade portion is used when a round blade is used as in the embodiment described later. Is also included in a form in which the tangential direction is oblique to the multilayer laminate material.

In the method for producing a reflective polarizer according to the present invention,
Since the blade portion of the cutting blade enters the multilayer laminate material obliquely, the force applied from the normal direction to the multilayer laminate material is small. That is, the force in the direction in which the layers are peeled off at the time of cutting is small. Therefore, even if the reflective polarizer is cut out of the multilayer laminated material, since the layers do not peel off at the cut surface of the reflective polarizer, the yield of the reflective polarizer is high, and a liquid crystal display device using this reflective polarizer is manufactured. Even if it is manufactured, the yield of the liquid crystal display device does not decrease due to peeling of the reflective polarizer.

In the present invention, when a band blade having the blade portion extending linearly is used as the cutting blade, the band blade is kept in a state where the blade portion of the band blade is obliquely directed to the multilayer laminate material. Is relatively lowered with respect to the multi-layer laminate, whereby the blade portion enters obliquely with respect to the multi-layer laminate. The term "relatively" here means, in addition to the case where the multilayer laminate material is fixed and the band blade is lowered,
This means that the band blade may be fixed and the multilayer laminate may be raised.

In the present invention, a circular blade having a circular blade portion is used as the cutting blade, and the circular blade is relatively moved with respect to the multilayer laminated material while rotating. The blade portion may enter the material substantially obliquely. "Relative" here
This means that, besides the case where the multilayer blade is fixed and the round blade is moved, the position of the round blade may be fixed and the multilayer laminate may be moved. Even in such a cutting method, since the tangential direction of the blade is oblique to the multilayer laminate, the blade enters obliquely to the multilayer laminate. Therefore, the multilayer laminate can be cut without causing the layers to peel off.

In the present invention, when cutting the multilayer laminated material, a support base having a slit into which a blade portion of the cutting blade enters at a position corresponding to a cutting line of the multilayer laminated material is used. It is preferable that the multilayer laminate is placed on a table and the multilayer laminate is cut. With this configuration, even if the multilayer laminate is placed on the support and cut, the cutting edge of the cutting blade enters the slit of the support, so that there is no problem in cutting the multilayer laminate. Further, since the multilayer lanate material is reliably supported from the back side by the support, the multilayer laminate material is not deformed.

In the present invention, since the layer does not peel off at the cut surface even when the multilayer laminated material is cut, even if the entire end face of the reflective polarizer is cut by the cutting blade, the yield is reduced. Does not decrease.

The reflective polarizer manufactured by such a method is as follows.
For example, it is used to manufacture a liquid crystal display device by attaching it to at least one transparent substrate of a liquid crystal panel.

[0019]

Embodiments of the present invention will be described with reference to the accompanying drawings. The configuration of the liquid crystal display device according to the present embodiment, the configuration of the reflective polarizer used in the liquid crystal display device, and the configuration of a large-sized multilayer laminate used for manufacturing the reflective polarizer are shown in FIGS. 1, 2, and 3. Is the same as the configuration described in the related art with reference to FIG. Therefore, the description of the configuration of the liquid crystal display device, the configuration of the reflective polarizer used in the liquid crystal display device, and the configuration of the large-sized multilayer laminate used for manufacturing the reflective polarizer will be omitted, and the features of each embodiment will be omitted. The description will focus on the parts.

(Manufacturing Method 1 of Reflective Polarizer) In this embodiment,
In order to manufacture the liquid crystal display device 1 using the reflective polarizer 202, as shown in FIG. 3, a large-sized multilayer laminate material 202 having the same multilayer structure as the reflective polarizer 202 is formed into a rectangular shape along a cutting line 203. Disconnect. As disclosed in Japanese Unexamined Patent Publication No. Hei 9-506985, this multilayer laminate material 202 comprises polyethylene naphthalate constituting the A layer of the reflective polarizer 202 and naphthalene dicarboxylic acid constituting the B layer. Manufactured by extruding a copolyester with terephthalic acid into a feedblock having a number of slots and using a continuous two-layer multiplier. Therefore, since the reflective polarizer 202 and the multilayer laminate 202 are both flexible substrates, when the multilayer laminate 200 is cut by a conventional method, peeling of layers occurs on the cut surface of the reflective polarizer 202. I do.

Accordingly, in the present embodiment, FIGS.
As shown in (1), the blade portion 71 of the cutting blade is inserted substantially obliquely into the large-sized multilayer laminated material 200 having flexibility, and the multilayer laminated material 200 is cut. That is,
As a cutting blade, a band blade 7 whose blade portion 71 extends obliquely and linearly
And the blade portion 71 of the band blade 7 is
The band blade 7 is lowered with respect to the multilayer laminated material 200 while being tilted obliquely with respect to 0.

At this time, FIGS. 4 (A), (B),
(C), and as shown in FIG. 5, the band blade 7 is positioned at a position corresponding to the planned cutting line 203 of the large-sized multilayer laminate 200.
The support base 8 in which the slits 81 into which the blade portions 71 completely enter are formed in a lattice shape is used. That is, the multilayer laminate 200 is placed on the support 8 and the multilayer laminate 2
00 is cut. Therefore, even if the multilayer laminated material 200 is placed on the support 8, the blade 71 enters the slit 81, so that there is no problem in cutting the multilayer laminated material 200. Further, since the multilayer lanate material 200 is securely supported from the back side by the support 8, the multilayer laminate 20
0 is not deformed.

As described above, in this embodiment, the rectangular reflective polarizer 202 is cut out of the multilayer laminated material 200 by making the blade portion 71 obliquely enter the flexible multilayer laminated material 200 having flexibility. The force applied to the laminate 200 from the normal direction is small. That is, in the multilayer laminate 200 (reflection polarizer 202), A
The force in the direction of peeling the layer and the layer B is small. Therefore, even if the reflective polarizer 202 is cut out from the multilayer laminate material 200, the peeling of the layer does not occur on the cut surface of the reflective polarizer 202, so that the yield of the reflective polarizer 202 is high,
In addition, even when the liquid crystal display device 1 is manufactured using the reflective polarizer 202, the yield of the liquid crystal display device 1 does not decrease due to the peeling of the layer on the reflective polarizer 202. Also,
Even when the multilayer laminate 200 is cut, the layers do not peel off at the cut surface, so that even if the entire end face of the reflective polarizer 202 is a cut surface, the yield does not decrease.

(Method 2 for manufacturing reflective polarizer) In this embodiment,
The reflective polarizer 202 is manufactured by cutting the large-sized multilayer laminate material 200 having flexibility. In this embodiment, FIG.
As shown in (A) and (B), the use of the rotating round blade 9 allows the circular blade portion 91 to enter the multilayer laminated material 200 substantially obliquely, and
Cut 00. That is, even if the circular blade 9 is moved with respect to the multilayer laminate 200 while rotating,
Is oblique to the multilayer laminate 200, which means that the blade portion 91 has entered the multilayer laminate 200 obliquely. Therefore, the force applied to the multilayer laminate 200 from the normal direction, that is, in the multilayer laminate 200 (the reflective polarizer 202), A
The force for peeling the layer from the layer B is small. Therefore,
Since the layer is not peeled off at the cut surface of the reflective polarizer 202, the yield of the reflective polarizer 202 is high. A decrease in the yield of the liquid crystal display device 1 due to the peeling of the layer does not occur. Further, even if the multilayer laminate 200 is cut, the layers do not peel off at the cut surface, so that even if the entire end face of the reflective polarizer 202 is a cut surface, the yield does not decrease.

Also in this embodiment, as shown in FIGS. 6A, 6B and 5, the slit 81 into which the blade portion 91 of the round blade 9 enters at a position corresponding to the planned cutting line 203 of the multilayer laminate 200. Is used, the multilayer laminate 200 is placed on the support 8, and the multilayer laminate 200 is cut. Accordingly, the support 8
Even when the multilayer laminated material 200 is placed on the upper surface, the blade portion 91 enters the slit 81, so that the multilayer laminated material 200
There is no hindrance to cutting. Also, the multilayer lanate material 200
Since the support 8 reliably supports the back side, the multilayer laminate 200 is not deformed.

(Method of Manufacturing Liquid Crystal Display) A method of manufacturing the liquid crystal display 1 according to this embodiment will be described with reference to FIG. FIG.
4 is a process sectional view illustrating the method for manufacturing the liquid crystal display device 1. FIG.

In FIG. 7, an ITO sputtering step ST1
Then, the ITO film 501 is continuously formed on the large-sized substrate 5 capable of taking a large number of the first substrate 10 and the second substrate 20 by sputtering. After this ITO sputtering process ST1,
Until the cutting step ST3 described later, both the first transparent substrate 10 and the second transparent substrate 20 are formed on the common large-sized substrate 5. Until the cutting step ST3, the first transparent substrate 10 and the second transparent substrate 20
Since it is subjected to the same processing as above, in FIG.
Until the seal printing step ST6, only the first transparent substrate 10 is illustrated.

Next, a photolithography process ST2 is performed on the large-sized substrate 5. This photolithography process S
In T2, first, the ITO film 501 formed on the large-sized substrate 5 is formed.
After applying a resist 502 over the entire surface of the substrate, exposure and development are performed using a photomask 503 to form a resist mask 504. Next, the ITO film 501 is etched using the resist mask 504 as a mask to pattern and form the striped electrodes 105 and 205 and other wiring patterns, and then the resist mask 504 is peeled off and removed.

Next, in the cutting step ST3, the large-sized substrate 5 is cut into a predetermined length, so that a large number of first transparent substrates 10 and a large number of second transparent substrates 20 can be formed. Divided into such medium-sized substrates.

Next, in an alignment film printing / firing step ST4, alignment films 101 and 201 are formed on both the first transparent substrate 10 and the second transparent substrate 20.

Next, in the rubbing step ST5, the first
A rubbing process is performed on both the transparent substrate 10 and the second transparent substrate 20.

Next, in a seal printing step ST6, a sealant 30 is printed on the first transparent substrate 10 or the second transparent substrate 20.

Next, in an assembling step ST7, after the spacers 32 are sprayed on the first transparent substrate 10 or the second transparent substrate 20, the first transparent substrate 10 and the second transparent substrate 20 are separated from each other by a medium-sized substrate. Laminate via the sealant 30 as it is.

In the strip cutting step ST8, the thus bonded pieces are cut into strips. In the strip cutting step ST8, the portions that will become the liquid crystal panel 100 when divided later are connected in a row in a strip shape, so that in the cut portion, any portion that becomes the liquid crystal panel 100 is connected to the liquid crystal injection port. (A break portion of the sealant 30 / not shown) is opened.

Next, in the injection / sealing step ST9, the liquid crystal LC is injected into the cell gap 31 between the first transparent substrate 10 and the second transparent substrate 20. In the injection / sealing step ST9, for example, after the inside of a processing chamber (not shown) containing the first transparent substrate 10 and the second transparent substrate 20 is evacuated, the liquid crystal injection port is filled with liquid crystal. After being immersed in the LC, the processing chamber is opened to the atmosphere. As a result, the processing chamber is released from the vacuum, but the first transparent substrate 10
The liquid crystal LC is vacuum-injected into the cell gap 31 from the liquid crystal injection port because the inside of the cell gap 31 sandwiched between the liquid crystal LC and the second transparent substrate 20 remains in a vacuum state. After the liquid crystal LC has been filled, the liquid crystal injection port 301 is filled.
Is sealed with a sealant made of an ultraviolet curable resin.

Next, in a single-piece cutting step ST10, the strip-shaped substrate is cut as a single-piece liquid crystal panel 100.

Next, in the pressure bonding step ST11, the anisotropic conductive film AC is applied to the electrode 110 of the second transparent substrate 20.
The terminals 210 of the flexible wiring board 2 are electrically connected via F.

Next, in the polarizer attaching step ST12,
The polarizer 102 is attached to the outer surface of the first transparent substrate 10. The reflective polarizer 202 (see FIG. 3) manufactured by the method described with reference to FIGS. 4, 5, and 6 is attached to the outer surface of the second transparent substrate 20.

Thereafter, in the IC mounting step ST13, the liquid crystal display device 1 is assembled by connecting the driving IC 60 to the flexible wiring board 2 connected to the liquid crystal panel 100.

(Other Embodiments) In the above embodiment, a passive matrix type liquid crystal display device has been described as an example. However, an active matrix type liquid crystal display device using a reflective polarizer may be used. The present invention can be applied to an apparatus. Further, the reflective polarizer may be attached to both surfaces of the liquid crystal panel.

[0041]

As described above, in the method for manufacturing a reflective polarizer and a liquid crystal display device according to the present invention, when a reflective polarizer is cut out of a multilayer laminated material, a flexible large-sized multilayer laminated material is formed. On the other hand, since the blade portion of the cutting blade enters obliquely, the force in the direction of peeling off the layers is small. Therefore, even if the reflective polarizer is cut out of the multilayer laminated material, since the layers do not peel off at the cut surface of the reflective polarizer, the yield of the reflective polarizer is high, and a liquid crystal display device using this reflective polarizer is manufactured. Even if it is manufactured, the yield of the liquid crystal display device does not decrease due to peeling of the reflective polarizer.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating a configuration of a liquid crystal display device.

FIG. 2 is a schematic configuration diagram of a reflective polarizer used in the liquid crystal display device shown in FIG.

FIG. 3 is an explanatory view of a large-sized multilayer laminate for producing the reflective polarizer shown in FIG. 2;

FIG. 4 is an explanatory view showing a method of cutting out the reflective polarizer shown in FIG. 2 from the multilayer laminate shown in FIG.

FIG. 5 is an explanatory view showing a support for supporting the multilayer laminate material on the back surface side in the step shown in FIG. 4;

FIG. 6 is an explanatory view showing another method of cutting out the reflective polarizer shown in FIG. 2 from the multilayer laminate shown in FIG.

7 is a process sectional view illustrating the method for manufacturing the liquid crystal display device illustrated in FIG.

8 is an explanatory view showing a conventional method of cutting out the reflective polarizer shown in FIG. 2 from the multilayer laminate shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Flexible wiring board 7 Band blade 8 Support stand 9 Round blade 10 First transparent substrate 20 Second transparent substrate 30 Sealant 31 Cell gap 32 Spacer 71 Blade portion of band blade 81 Slit of support base 91 Round Blade part 100 Liquid crystal panel 101, 201 Alignment film 102 Polarizer 105, 205 Striped electrode 110 Liquid crystal panel electrode 200 Multilayer laminate material 202 Reflective polarizer 203 Planned cutting line

Claims (7)

[Claims] 1. A multi-layer laminated material comprising two types of layers in which the refractive indices in one direction are substantially equal to each other in two directions orthogonal to each other in the in-plane direction and the refractive indices in the other direction are alternately laminated. A method of cutting a reflective polarizer, comprising: cutting the multilayer laminate by substantially obliquely entering a blade portion of a cutting blade with respect to the multilayer laminate. Production method. 2. Reflecting light of a linear polarization component in a predetermined direction,
A manufacturing method for cutting a reflective polarizer made of a large-sized multilayer laminate material capable of transmitting light of a linear polarization component in a direction orthogonal to the predetermined direction, wherein a cutting blade for the multilayer laminate material A method of manufacturing a reflective polarizer, comprising cutting a multilayer laminate material by making a portion enter substantially obliquely. 3. The cutting blade according to claim 1, wherein the cutting blade is a band blade in which the blade portion extends linearly, and the blade portion of the band blade is directed obliquely with respect to the multilayer laminated material. A method of manufacturing a reflective polarizer, wherein a band edge is lowered relative to the multilayer laminate material so that the blade portion enters the multilayer laminate material obliquely. 4. The cutting blade according to claim 1, wherein the cutting blade is a round blade having a circular blade portion, and the cutting blade is moved relative to the multilayer laminate while rotating the round blade. A method of manufacturing the reflective polarizer, wherein the blade portion is made to enter the multilayer laminate material substantially obliquely. 5. The method according to claim 1, wherein
Using a support base provided with a slit into which the blade portion of the cutting blade enters at a position corresponding to the planned cutting line of the multilayer laminate material, placing the multilayer laminate material on the support base, A method for producing a reflective polarizer, comprising cutting. 6. A method for manufacturing a reflective polarizer, wherein the reflective polarizer manufactured by the method according to any one of claims 1 to 4 has an entire end face cut by the cutting blade. 7. A liquid crystal display device comprising the steps of: manufacturing a reflective polarizer by the method according to claim 1; and attaching the reflective polarizer to at least one transparent substrate of a liquid crystal panel. Production method.