JPH08271881A - Structure and method for arranging polarizing plate - Google Patents

Abstract

PURPOSE: To provide structure for arranging a polarizing plate by which the appropriate orientation of liquid crystal is maintained by contriving spatial arranging relation between a polarizing plate and a liquid crystal base plate. CONSTITUTION: The liquid crystal base plate 20 in which antiferroelectric liquid crystal is sealed and both polarizing plate members 30 and 40 are assembled in a casing 10 through both spacers 50 and 60. The member 30 is constituted by sticking the upper polarizing plate 32 to the inner surface of a transparent plate 31, while the member 40 is constituted by sticking the lower polarizing plate 42 to the inner surface of a transparent plate 41. The spacer 50 is made to intervene between the outer periphery part of the common base plate 21 of the base plate 20 and the outer periphery part of the transparent plate 31, while the spacer 60 is made to intervene between the outer periphery part of the common base plate 21 and the outer periphery part of the transparent plate 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure and an arrangement method of a polarizing plate on a liquid crystal substrate having various liquid crystals such as antiferroelectric liquid crystal, ferroelectric liquid crystal and TN type liquid crystal.

[0002]

2. Description of the Related Art Conventionally, for example, in a liquid crystal display device, usually both polarizing plates are directly attached to both surfaces of a liquid crystal substrate.

[0003]

By the way, such a polarizing plate is attached to the liquid crystal substrate in the following manner. First, the liquid crystal substrate is placed on an appropriate table. Then, one polarizing plate is positioned on one side surface of the liquid crystal substrate, and the polarizing plate is directly attached to the one side surface of the liquid crystal substrate while applying a roller to the polarizing plate from the upper surface to the liquid crystal substrate. Paste it on. Then, the liquid crystal substrate is turned over and placed on the table. Then, the other polarizing plate is positioned on the other surface of the liquid crystal substrate, and the polarizing plate is directly applied to the other surface of the liquid crystal substrate while applying a roller to the liquid crystal substrate from the upper surface of the polarizing plate. Paste it on.

However, when the liquid crystal of the liquid crystal substrate is, for example, an antiferroelectric liquid crystal, the antiferroelectric liquid crystal has a weak alignment force. Therefore, the orientation of the antiferroelectric liquid crystal is disturbed by the above-mentioned weighting by the roller, which causes a decrease in contrast and display unevenness. Further, when the liquid crystal of the liquid crystal substrate is the antiferroelectric liquid crystal as described above, since the antiferroelectric liquid crystal has birefringence, the polarization axes of both polarizing plates are accurately aligned with the crossed Nicols position. In addition, if the polarization axes of one of the polarizing plates are not accurately aligned with the optical axis of the liquid crystal substrate (alignment axis of the liquid crystal), the contrast is lowered and flicker is increased.

In other words, in order to suppress an increase in dark brightness and an increase in flicker that cause low contrast, the angle formed by the optical axis of the liquid crystal substrate and one of the polarization axes of both polarizing plates is 0.
The angle between the optical axis of the liquid crystal substrate and the polarization axis of the other polarizing plate must be within 90 ° ± 1 °. The crossed Nicols position means that the polarization axes of both polarizing plates are at right angles to each other.

Here, in order to directly adhere both polarizing plates to both surfaces of the liquid crystal substrate in order to meet the above-mentioned need for accuracy, the end faces of both polarizing plates are usually aligned with the reference plane on the liquid crystal substrate. I am going. However, in such a pasting method, the angle formed between the end faces of both polarizing plates and the polarizing axes of the polarizing plates usually varies (about ± 2 degrees), and the optical axis of the liquid crystal substrate and the liquid crystal substrate. The angle formed with the reference plane of (1) also varies (about ± 1 degree). Therefore, the accuracy required for the crossed Nicols arrangement cannot be obtained sufficiently, and as a result,
It is impossible to eliminate the decrease in contrast and the increase in flicker.

In view of the above, the present invention provides a polarizing plate arrangement structure in which the arrangement of the polarizing plate with respect to the liquid crystal substrate is devised to maintain proper alignment of the liquid crystal. The first purpose is to provide. A second object of the present invention is to provide a polarizing plate arranging method in which both the polarizing plates are arranged at the crossed Nicols position and the liquid crystal substrate is arranged with high optical accuracy.

[0008]

In order to achieve the above object, in the invention described in claim 1, both polarizing plates (3
In a polarizing plate arrangement structure in which (2, 42) are arranged in a crossed Nicol position so as to face each other with the liquid crystal substrate (20) interposed therebetween, both transparent plates (supported so as to face each other with the liquid crystal substrate (20) interposed therebetween ( 31 and 41), and a polarizing plate arranging structure characterized in that each polarizing plate (32, 42) is attached to each of these transparent plates.

According to the second aspect of the invention,
First step (S2) of attaching both polarizing plates (32, 42) to both transparent plates (31, 41), and both polarizing plates (32, 42)
The second step (S3) of optically aligning the polarization axis of one (42) with the polarization axis of the other polarizing plate (32) at a position of crossed Nicols and one polarizing plate (42) are attached. A liquid crystal substrate (20) is interposed between one (41) of the attached transparent plates (31, 41) and the other transparent plate (31) to which the other polarizing plate (32) is attached. The third step (S4, S5) of optically aligning the optical axis of the liquid crystal substrate with one of the polarization axes of the polarizing plates (32, 42) and the axial relationship aligned in the third step are maintained. And a fourth step (S6, S7) in which both transparent plates (31, 41) are arranged so as to face each other with the liquid crystal substrate (20) facing each other in this state. .

Further, according to the invention described in claim 3, in the polarizing plate arranging method according to claim 2, the fourth step (S6,
The liquid crystal substrate (2) of both transparent plates (31, 41) in S7)
0) is arranged such that spacers (50, 60) are interposed between the outer peripheral portion of the liquid crystal substrate (20) and the outer peripheral portions of both transparent plates (31, 41). Four
1) and the liquid crystal substrate (20) for each spacer (50, 60)
It is characterized by being overlapped with each other.

According to a fourth aspect of the invention, in the polarizing plate arranging method according to the second or third aspect, the optical alignment in the second step (S3) is performed by using both polarizing plates (3
2, 42) based on the minimum value of the intensity of the light transmitted,
In addition, the optical alignment in the third step (S4, S5) is based on the minimum value of the intensity of light transmitted through the one polarizing plate (42), the liquid crystal substrate (20) and the other polarizing plate (32). It is characterized by performing.

The reference numerals in parentheses of the above constituent elements indicate the corresponding relationship with the concrete constituent elements described in the embodiments described later.

[0013]

According to the invention described in claim 1, each polarizing plate is attached to both transparent plates supported so as to face each other through the liquid crystal substrate. In this way, since each polarizing plate is attached to each transparent plate instead of the liquid crystal substrate, no force is applied to the liquid crystal substrate when arranging both polarizing plates via the liquid crystal substrate.
Therefore, even if the liquid crystal of the liquid crystal substrate has weak alignment force such as antiferroelectric liquid crystal, it is possible to provide a polarizing plate arrangement structure that does not disturb the alignment of the liquid crystal.

According to the invention described in claims 2 to 4, the polarization axis of one of the polarizing plates is optically aligned at a crossed Nicol position with respect to the polarization axis of the other polarizing plate.
As a result, the alignment can be performed with high accuracy at the crossed Nicols position with respect to the polarization axes of both polarizing plates. In addition, a liquid crystal substrate is interposed between one transparent plate having one polarizing plate attached thereto and the other transparent plate having the other polarizing plate attached thereto, and the optical axis of the liquid crystal substrate is set between the two polarizing plates. Optically align with one of the polarization axes. As a result, the optical axis of the liquid crystal substrate can be accurately aligned with the polarization axis of one of the two polarizing plates arranged at the crossed Nicols position.

Further, while maintaining the relationship between the polarization axis and the optical axis aligned as described above, both transparent plates to which both polarizing plates are adhered are supported so as to face each other via the liquid crystal substrate. To place. As a result, it is possible to achieve the same operational effect as the invention described in claim 1.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example in which the present invention is applied to a liquid crystal display device. This liquid crystal display device includes a frame-shaped casing 10, and the liquid crystal substrate 20 and both polarizing plate members 30 and 40 are assembled in the casing 10 via upper and lower spacers 50 and 60, respectively. ing.

The liquid crystal substrate 20 is constructed by combining the common substrate 21 and the counter substrate 22 via a seal and sealing the antiferroelectric liquid crystal by the seal between the common substrate 21 and the counter substrate 22. Polarizing plate member 30
Is formed by attaching an upper polarizing plate 32 to the inner surface of a transparent plate 31 such as a transparent inorganic glass plate or a transparent plastic plate, while the polarizing plate member 40 is similar to the forming material of the transparent plate 31. The lower polarizing plate 42 is attached to the inner surface of the transparent plate 41 formed of the above material.

The upper spacer 50 is interposed between the outer peripheral portion of the common substrate 21 and the outer peripheral portion of the transparent plate 31, while the lower spacer 60 is disposed between the outer peripheral portion of the common substrate 21 and the transparent plate 41. It is interposed between the outer peripheral portion. As a result, the liquid crystal substrate 20 is maintained in the center of the casing 10 in the thickness direction. Both spacers 50 and 60 are formed of a material having a large friction coefficient, such as rubber, in order to prevent positional displacement.

Further, the polarizing plate member 30 is sandwiched between the upper opening 11 of the casing 10 and the upper spacer 50 on the outer peripheral portion of the transparent plate 31, while the polarizing plate member 40 is provided.
Is sandwiched between the lower opening 12 of the casing 10 and the lower spacer 60 at the outer peripheral portion of the transparent plate 41.
As a result, the upper polarizing plate 32 and the lower polarizing plate 42 are maintained parallel to each other at a position apart from the liquid crystal substrate 20 so as to face each other with the liquid crystal substrate 20 interposed therebetween. In this case, since the polarizing plates 32 and 42 are attached to the transparent plates 31 and 41 instead of the liquid crystal substrate 20, unlike the case of attaching the polarizing plates 32 and 42 to the liquid crystal substrate 20, No weight is applied to the dielectric liquid crystal. Therefore, the orientation of the antiferroelectric liquid crystal can be properly maintained without disturbing it. As a result, it is possible to prevent deterioration of the display contrast of the liquid crystal display device and occurrence of display unevenness.

The polarization axis of the upper polarizing plate 32 coincides with the optical axis of the liquid crystal substrate 20 (the alignment axis of the antiferroelectric liquid crystal), and is crossed nicols with respect to the polarization axis of the lower polarizing plate 42. Aligned to position. Next, focusing on a method of disposing both polarizing plates 30 and 40 with respect to the liquid crystal substrate 20, FIG.
~ It demonstrates with reference to FIG.

First, in the liquid crystal substrate forming step S1, the liquid crystal substrate 20 having the above-described structure is formed. Next, in the polarizing plate member forming step S2, the transparent plate 3 is placed on an appropriate mounting table.
Place 1. Then, the upper polarizing plate 32 is positioned on the surface of the transparent plate 31, and the upper polarizing plate 32 is directly attached to the surface of the transparent plate 31 while applying a weight to the transparent plate 31 from the upper surface thereof by using a roller. Paste it on. Thereby, the polarizing plate member 30 is formed.

Further, instead of the transparent plate 31, the transparent plate 41 is placed on the mounting table. Then, the lower polarizing plate 42 is positioned on the surface of the transparent plate 41, and the lower polarizing plate 42 is directly attached to the surface of the transparent plate 41 as in the case of the polarizing plate 32. Thereby, the polarizing plate member 40 is formed. Then, in the crossed Nicol placement step S3, the upper and lower stages 90, 110 of the optical placement adjustment device S shown in FIG.
Thus, the arrangement of the polarizing plates 32 and 42 is adjusted by optical alignment to the crossed Nicols position as follows.

Here, in the optical arrangement adjusting device S,
The upper and lower stages 90 and 110 are the triangular base 70.
Is movably assembled to three guide rods 80 vertically provided on the upper surface of the. The upper stage 90 is shown in FIGS.
As shown in (a) and FIG. 5, a fixed disc 91 is provided, and a rectangular recess 91a for accommodating the polarizing plate member 30 is formed on the lower surface of the fixed disc 91. The fixed disc 91 is fitted so as to be movable along each guide rod 80 in each through hole portion 91b.

Here, the fixed disc 91 is fixed by tightening the screws 93 into the female screw holes 91c such that the tips of the screws 93 are brought into contact with the surfaces of the guide rods 80.
A rectangular opening for transmitting light from the light source 120 is formed in the center of the upper wall of the recess 91a. In addition, the upper stage 90, as shown in FIG.
It is provided with four fixing mechanisms 92, and each of these fixing mechanisms 9
2 are arranged at equal intervals on the upper wall of the recess 91a.
In this case, each fixing mechanism 92 is configured such that the movable element 92c is movably accommodated in the box-shaped guide hole 92a via the compression coil spring 92b.

When fixing the transparent plate 31 of the polarizing plate member 30 to the upper stage 90, the polarizing plate 32 is used.
4A in a downward direction as shown by the chain double-dashed line in FIG. 4A, the transparent plate 31 is opposed to the elastic force of each compression coil spring 92b and each movable element 92c is connected to each guide hole portion 92.
While being pushed into the opening a and pushed open, it is fitted between the movable elements 92c and fixed to the upper wall of the recess 91a.

On the other hand, the lower stage 110 is shown in FIGS.
As shown in (c) and FIG. 7, an annular fixing plate 111 is provided, and the fixing plate 111 has each through hole portion 111.
It is fitted so as to be movable along each guide rod 80 at a. Further, the fixing plate 111 is fixed by tightening the screws 112 into the female screw holes 111b such that the tips of the screws 112 are brought into contact with the surfaces of the guide rods 80.

Further, the lower stage 110 includes the fixed plate 11
A rotary disc 114 concentrically and rotatably assembled through a plurality of spheres 113 is provided in the hollow portion of one, and the fixed disc 114 has an upper surface of a rectangular shape for accommodating the polarizing plate member 40. A recess 114a is formed. In addition, recess 1
At the center of the bottom wall of 14a, a square opening for transmitting light from the light source 120 is formed.

As shown in FIGS. 4 (c) and 7, the upper stage 90 is provided with each fixing mechanism 115, and each fixing mechanism 115 is fixed on the bottom wall of the recess 114a. It is provided at a position corresponding to 92.
In this case, each fixing mechanism 115 has the same configuration as each fixing mechanism 92, and each fixing mechanism 115 corresponds to the guide hole portion 92a, the compression coil spring 92b, and the mover 92c of each fixing mechanism 92. Guide hole 115
a, compression coil spring 115b and mover 115c
It has.

When the transparent plate 41 of the polarizing plate member 40 is fixed to the lower stage 110, the polarizing plate 4
2 is directed upward as shown by the chain double-dashed line in FIG. 4 (c), the transparent plate 41 is moved against the elastic force of each compression coil spring 115b and each mover 115b is inserted into each guide hole 115a. Each of these movers 115b while pushing
And is fixed to the bottom wall of the recess 114a.

In the fixed state of the polarizing plate members 30 and 40 by the upper and lower stages 90 and 110 as described above, the polarizing plates 31 and 41 are accurately positioned coaxially with each other. There is. After that, the rotating disc 114 of the lower stage 110 is rotated, and the light from the light source 120 is transmitted through the opening of the rotating disc 114, the polarizing plate member 40, the opening of the intermediate stage 100 described later, the polarizing plate member 30, and the upper stage. The openings of the stage 90 are sequentially transmitted.

In such a state, the intensity of the light transmitted through the opening of the upper stage 90 is measured by the photomultimeter M, and the measurement result is observed by the oscilloscope P. With this observation, when the measurement result of the photomultimeter M indicates the minimum intensity of the transmitted light, the rotating disk 11
The rotation of 4 is stopped and the polarizing plate member 40 is held at that position.

In this case, as described above, when the measurement result of the photomultimeter M indicates the minimum intensity of the transmitted light, the polarizing plate member 40 is stopped, so that the polarization axis of the lower polarizing plate 42 is the upper polarizing plate 32. The position of 90 ° is deviated from the polarization axis of 1 with high accuracy. When the process of the crossed Nicol placement step S3 as described above is completed, the next liquid crystal substrate setting step S4 is performed.
In, the liquid crystal substrate 20 is set on the middle stage 100 as follows.

Here, the middle stage 100 has substantially the same structure as the lower stage 110, and the middle stage 100 has a lower stage as shown in FIGS. 3, 4B and 6. An annular fixing plate 111 of the stage 110, each screw 112, a plurality of spheres 113, a rotating disc 114, and an annular fixing plate 101 corresponding to each fixing mechanism 115,
Each screw 102, a plurality of spheres 103, a rotating disk 104, and each fixing mechanism 105 are provided.

The fixed plate 101 has a through hole portion 1
It is fitted so as to be movable along each guide rod 80 at 01a. Further, the fixing plate 101 is fixed by fastening the screws 102 to the female screw holes 101b so that the tips of the screws 102 abut on the guide rods 80.
Further, the rotary disc 104 is provided with a recess 114 a of the rotary disc 114.
Has a recess 104a corresponding to
The opening corresponding to the opening of the recess 104a of the
The counter substrate 22 is accommodated and the light from the light source 120 is transmitted. In order to secure a space for arranging spacers 50 and 60 described later, the recess 10
The opening width of 4a is wider than the opening width of the recess 114a.

Further, each fixing mechanism 105 corresponds to each fixing mechanism 1
15 guide hole 115a, compression coil spring 11
5b and the mover 115c, the corresponding guide hole 105a, the compression coil spring 105b, and the mover 1
With 05c. In order to fix the liquid crystal substrate 200 to the middle stage 100, the common substrate 21 is moved to each compression coil spring with the counter substrate 22 facing downward as shown by the chain double-dashed line in FIG. 4B. The movable elements 105c are inserted into the respective movable elements 105c while being pushed into the respective guide hole portions 105a against the elastic force of 105b, and fixed to the bottom wall of the recess 104a. In addition,
The liquid crystal substrate 20 fixed in this way is provided with the polarizing plates 31, 4
It is accurately positioned coaxially with 1.

Then, in the liquid crystal substrate adjusting step S5,
While rotating the rotating disk 104 of the middle stage 100, the light from the light source 120 is transmitted through the opening of the rotating disk 114,
The polarizing plate member 40, the opening of the middle stage 100 and the liquid crystal substrate 20, the polarizing plate member 30, and the opening of the upper stage 90 are sequentially transmitted. In such a state, the intensity of the light transmitted through the opening of the upper stage 90 is measured by the photomultimeter M.
And the observation result is observed by the oscilloscope P. With this observation, when the measurement result of the photomultimeter M indicates the minimum intensity of the transmitted light, the rotation of the rotating disc 104 is stopped and the liquid crystal substrate 2 is placed at that position.
Holds 0.

In this case, since the liquid crystal substrate 20 is stopped when the measurement result of the photomultimeter M indicates the minimum intensity of the transmitted light as described above, the optical axis of the liquid crystal substrate 20 is fixed at the crossed Nicol position. The polarization axes of the two polarizing plates 32 and 42 are accurately matched. In addition, both polarizing plates 32, 4
2 is not attached to the liquid crystal substrate 20, so both polarizing plates 3
It is easy to position the optical axis of the liquid crystal substrate 20 with respect to one of the polarization axes of 2, 42.

Then, in the next spacer installation step S6, the seal 60 is attached and installed on the outer peripheral portion of the transparent plate 41 with an adhesive, and the seal 50 is adhered on the outer peripheral portion of the common substrate 21 with an adhesive. Set up. In addition,
An adhesive is also applied to the upper surface of each seal 50, 60.
Then, in the superposing step S7, the screws 93, 1
Loosen 02, 112 to remove each stage 90, 100, 11
Stack 0. At this time, the outer peripheral portion of the transparent plate 31 is adhered to the seal 50 and fixed to the outer peripheral portion of the common substrate 21, while the common substrate 21 is adhered to the seal 60 and fixed to the outer peripheral portion of the transparent plate 41. Polarizing plate member 30,
40 is superposed and fixed on the liquid crystal substrate 20 via both seals 50 and 60 without any positional deviation. Then, the respective stages 90 to 110 thus stacked are removed from the respective guide rods 80.

Then, in the casing assembling step S8, the polarizing plate member 4 in the state of being overlapped as described above.
0, lower spacer 60, liquid crystal substrate 20, upper spacer 5
0 and the polarizing plate member 30 are assembled in the casing 10. This completes the manufacture of the liquid crystal display device. As described above, the upper polarizing plate 32 is attached to the transparent plate 31 to form the polarizing plate member 30, while the lower polarizing plate 42 is attached to the transparent plate 41 to form the polarizing plate member 40. , 40 are supported separately from the liquid crystal substrate 20.

Therefore, both polarizing plates 3 are attached to the liquid crystal substrate 20.
In disposing Nos. 1 and 41, the liquid crystal substrate 20 is not subjected to a weight that disturbs the alignment of the antiferroelectric liquid crystal of the liquid crystal substrate 20. As a result, the alignment characteristics of the antiferroelectric liquid crystal of the liquid crystal substrate 20 can be properly maintained. In addition, both polarizing plates 32,
When the optical alignment of 42 and the liquid crystal substrate 20 is performed, the polarization axes of the polarizing plates 32 and 42 are optically aligned to the crossed Nicols position by adjusting the rotation of the polarizing plate 42, and then the optical axes of the liquid crystal substrate 20 and The rotation position of the liquid crystal substrate 20 is adjusted so that the positions of the polarizing plates 32 and 42 with respect to one of the polarization axes correspond to the dark brightness minimum value.

Therefore, even if the liquid crystal of the liquid crystal substrate 20 is the antiferroelectric liquid crystal, both the polarizing plates 32 and 42 and the liquid crystal substrate 20.
The optical alignment of can be accurately performed. This makes it possible to easily provide a liquid crystal display device having high contrast and low flicker without disturbing the orientation of the antiferroelectric liquid crystal. In addition,
In the above-mentioned embodiment, by observing the light intensity measurement result by the photomultimeter M with the oscilloscope, both the polarizing plates 32 in the crossed Nicol arrangement step S3,
The liquid crystal substrate 2 for both the polarizing plates 32 and 42 in the optical crossed Nicol arrangement adjustment of 42 and the liquid crystal substrate adjusting step S5.
Although the optical position adjustment of 0 is performed, instead of this, the flicker is detected while the frequency analysis of the light intensity measurement result by the photomultimeter M is performed by the frequency analysis device FFT (shown by the chain double-dashed line in FIG. 3). Even if the optical crossed Nicols arrangement adjustment and the optical position adjustment of the liquid crystal substrate 20 are performed so as to obtain the minimum value, it is possible to achieve the same effect as the above embodiment.

Further, in the above embodiment, an example in which both polarizing plate members 30 and 40 are supported apart from the liquid crystal substrate 20 has been described, but instead of this, both polarizing plate members 30 and 40 are supported.
It may be carried out by bringing 0 into contact with the liquid crystal substrate 20 without applying a load. Further, in the above embodiment, an example in which both the polarizing plates 32 and 42 directly face the liquid crystal substrate 20 has been described, but instead of this, both polarizing plates 32 and 4 are provided.
You may arrange | position and implement so that at least 1 of 2 may face outside.

Further, the present invention is not limited to the liquid crystal display device, but the present invention may be applied to the arrangement structure and the arrangement method of both polarizing plates with respect to the liquid crystal substrate of the liquid crystal switch. Further, in implementing the present invention, the liquid crystal of the liquid crystal substrate 20 is not limited to the antiferroelectric liquid crystal, and may be, for example, a ferroelectric liquid crystal or a TN type liquid crystal.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a liquid crystal display device to which the present invention is applied.

FIG. 2 is a diagram mainly showing a step of disposing both polarizing plates on the liquid crystal substrate of FIG.

FIG. 3 is an explanatory diagram of a measuring method for adjusting optical positions of both polarizing plate members and a liquid crystal substrate by using an optical arrangement adjusting device in the crossed Nicol arrangement step and the liquid crystal substrate adjusting step of FIG.

4 is an enlarged cross-sectional view of each stage of the optical arrangement adjusting device of FIG.

FIG. 5 is an enlarged bottom view of the upper stage.

FIG. 6 is an enlarged top view of a middle stage.

FIG. 7 is an enlarged top view of a lower stage.

[Explanation of symbols]

20 ... Liquid crystal substrate, 31, 41 ... Transparent plate, 32,
42 ... Polarizing plate, 50, 60 ... Spacer.

Claims (4)

[Claims] 1. A polarizing plate arranging structure in which both polarizing plates are arranged in a crossed Nicol position so as to face each other with a liquid crystal substrate interposed therebetween, and both transparent plates are supported so as to face each other with the liquid crystal substrate interposed therebetween. A polarizing plate arranging structure characterized in that each of the polarizing plates is attached to each of the transparent plates. 2. A first step of adhering both polarizing plates to both transparent plates, and optically aligning one polarizing axis of the both polarizing plates to a crossed Nicol position with respect to the polarizing axes of the other polarizing plates. And a second step of performing the liquid crystal substrate between one of the transparent plates having the one polarizing plate attached thereto and the other transparent plate having the other polarizing plate attached thereto. A third step of optically aligning the optical axis of the substrate with one of the polarization axes of the both polarizing plates, and the liquid crystal substrate through the liquid crystal substrate while maintaining the axial relationship aligned in the third step. And a fourth step of arranging both transparent plates so as to face and support each other. 3. The arrangement of the both transparent plates with respect to the liquid crystal substrate in the fourth step is such that spacers are respectively interposed between the outer peripheral portion of the liquid crystal substrate and the outer peripheral portions of the both transparent plates. The polarizing plate arranging method according to claim 2, wherein the method is performed by stacking a transparent plate and a liquid crystal substrate with the spacers interposed therebetween. 4. The optical alignment in the second step is performed on the basis of the minimum value of the intensity of light transmitted through the both polarizing plates, and the optical alignment in the third step is performed by The polarizing plate arranging method according to claim 2 or 3, wherein the minimum value of the intensity of light transmitted through the polarizing plate, the liquid crystal substrate and the other polarizing plate is used as a reference.