JPH05196815A - Optically anisotropic substance and production of optically anisotropic substance as well as liquid crystal device having optically anisotropic substance - Google Patents

Abstract

PURPOSE:To enable the inexpensive formation of the liquid crystal device having a high visual field angle, high contrast and the excellent uniformity of black and white display performance and to obtain the liquid crystal display which can be simultaneously reduced in size, weight and cost by chemically bonding a specific liquid crystal high polymer and a substrate at the boundary thereof. CONSTITUTION:The liquid crystal high polymer and substrate of the optically anisotropic substance forming the liquid crystal high polymer contg. at least one component of the repeating unit expressed by formula are chemically bonded. Namely, the surface of the high-polymer substrate is activated by a plasma treatment, etc., and a monomer which is the precursor of the high polymer exhibiting crystallinity is graft polymerized. The liquid crystal high polymer is a high polymer which consists of an acrylic chain or has the methacrylic chain mainly in the skeleton and has room temp. or above of the glass transition temp. The surface of the transparent substrate is subjected to uniaxial orientation or the optically active component consisting of at least one component is incorporated therein and the substrate is subjected to a twist orientation having a spiral axis in the normal direction of the substrate. In the formula, n denotes 2 to 6; R1 denotes H and CH3; R2 denotes OCH3, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical anisotropic body, a liquid crystal device having the optical anisotropic body, and a method for manufacturing the same, and in particular, black and white,
Further, the present invention relates to an optical anisotropic body capable of color display, a liquid crystal device including the optical anisotropic body, and a manufacturing method thereof.

[0002]

2. Description of the Related Art As an optically anisotropic body used in a conventional black and white liquid crystal device, a liquid crystal cell used in a two-layer type super twist nematic liquid crystal device (hereinafter referred to as DSTN), as shown in FIG. One stretched film of a film compensation type liquid crystal device as shown in FIG. 1 (b) and two stretched films of a film compensation type liquid crystal device as shown in FIG. 1 (c) are known. In FIG. 1, a transparent substrate 1 having electrodes
-1 is stuck together via the spacer 1-2, and the liquid crystal 1-3 is injected. Hereinafter, these are collectively referred to as a display cell 1-6. The display cell 1-6 is a left twist STN cell of 230 degrees. Each of the liquid crystal devices includes the polarizing plate 1-4 and the optically anisotropic body as its constituent elements.

These optical anisotropic bodies compensate for the change of the linearly polarized light which has passed through the polarizing plate into the elliptically polarized light which is caused by the birefringence and the optical rotatory power of the STN liquid crystal cell, and returns to the incident white linearly polarized light. It plays a role, and as a result, black and white liquid crystal display is possible.

[0004]

As shown in FIG. 1 (a), in the DSTN, the optically anisotropic body is a liquid crystal cell 1-5 having a twist direction opposite to the twist direction of the display cell, and .DELTA.nd.
Is set almost equal to that of the display cell. Therefore, the DSTN liquid crystal device is excellent in high contrast, wide viewing angle, black and white display characteristics, and the like. However, since the DSTN liquid crystal device uses two liquid crystal cells, the cost of the display body increases, and there are problems such as being thick and heavy.

FIG. 1 (b) shows a film compensation type liquid crystal device (hereinafter referred to as FTN1) developed to compensate for the above-mentioned drawbacks of the DSTN liquid crystal device. This system uses a birefringent uniaxially stretched film 1-7 as an optically anisotropic body, and has features such as low cost, thinness, and lightness. However,
With one uniaxially stretched film 1-7, the compensation of coloring due to the optical rotatory power of the STN liquid crystal cell is not sufficient, resulting in a slightly bluish display, and there are problems such as low contrast and narrow viewing angle. ..

Under such circumstances, the FTN2 mode, which has the characteristic that the film-compensation type liquid crystal cell is thin and has a high viewing angle and a high contrast display characteristic, has been put into practical use. As shown in FIG. 1C, the FTN2 mode is characterized in that two uniaxially stretched films 1-7 are used in a stacked manner. FTN2 is also able to achieve high contrast and a wide viewing angle by compensating for the optical rotatory power that could not be compensated by one uniaxially stretched film 1-7 by shifting the stretching axis of the film. However, the display characteristic is N
At present, it does not reach the display characteristics of the TN mode. Further, since two uniaxially stretched films 1-7 are used, there is a problem that cost reduction is difficult.

On the other hand, recently, JP-A-3-17121, EUR
OPEN PATENT APPLICATION
No. 0380338 shows an optical retardation plate using a liquid crystal polymer. In this optical retardation plate, the orientation temperature of the liquid crystal polymer material is as high as about 200 ° C., and when the optical retardation plate is formed on the base material, the optical anisotropic base material is required to have heat resistance, There are problems that the material is limited, and that the internal stress of the base material is relaxed by heat, so that shrinkage, warpage, peeling, and the like are easily generated.

[0008]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and provides a liquid crystal display device at a low cost, which is capable of mass production, thinning, weight reduction, and dramatically improving display characteristics. The surface of the organic polymer thin film or film is U
It is well known that the polymer chains on the substrate surface or the bonds forming the polymer chains are broken and radicals are generated by the treatment with V, plasma or the like. As their applications, improvement of wettability of the substrate surface and practical use of hybrid film have been made. The present invention is an application of this technique, and as a result of our study, the present invention has been achieved. That is, the present invention is characterized by the following points. That is, 1) General formula on a transparent substrate

[0009]

[Chemical 2]

In an optically anisotropic body formed with a liquid crystal polymer containing at least one component represented by the repeating unit, the liquid crystal polymer and the substrate are chemically bonded, and the liquid crystal polymer is an acrylic chain. Or a polymer having a glass transition temperature of room temperature or higher mainly having a methacrylic chain in the skeleton,
The transparent substrate is uniaxially oriented or twisted with at least one component of an optically active compound and having a helical axis in a direction normal to the substrate.

2) The transparent substrate is an organic polymer or
It is characterized in that it is a film obtained by uniaxially or biaxially stretching an organic polymer.

3) In the method for producing an optically anisotropic body in which a liquid crystal polymer having a uniaxially oriented or twisted orientation is formed on a transparent substrate, a step of performing an orientation treatment on the transparent substrate and activating the substrate surface. Either the step of activating, or the step of simultaneously performing the alignment treatment and the activation of the substrate surface, the step of immersing the activated transparent substrate in the solution of the polymerizable monomer, laminating the polymer on the transparent substrate surface, and the step of drying And a step of orienting the laminated polymer, and a step of cooling the transparent substrate from the orientation treatment temperature, the step of performing the orientation treatment is a rubbing method, or the substrate surface is activated, In the process of performing the alignment treatment at the same time, the distance from the surface activation energy source to the substrate surface is arranged so as to be different at two points on the surface, and the distance from the activation energy source to the substrate surface is changed to a long or short difference. Only, characterized in that the liquid crystal alignment ability is a step of applying to the substrate surface of the liquid crystal cell.

4) A liquid crystal device comprising a liquid crystal cell in which a liquid crystal is sandwiched between substrates on which electrodes are formed, at least one optically anisotropic body, at least one polarizing plate, a liquid crystal driving driver and a liquid crystal driving circuit. In above, the optical anisotropic body is closely attached to at least one surface of the liquid crystal cell, or is installed.

[0014]

In the present invention, the surface of a polymer substrate is activated by plasma treatment or the like, and a monomer, which is a precursor of a polymer exhibiting liquid crystallinity, is graft-polymerized to improve the flatness. A uniform liquid crystal polymer layer can be formed on a molecular substrate or a film. Also, due to the potential difference of the ions in the plasma generation region, the ions collide with the substrate with directivity to activate the chemically bound species near the surface and generate free stable radicals. This radical is relatively stable,
In addition to the effect of an ordinary initiator of solution radical polymerization, it plays a role of a generation source of polymerization nuclei, and other polymers can be grafted on the polymer substrate.

The optical anisotropic body needs to strictly control the product of the phase difference and the thickness (hereinafter referred to as Δnd), and the method for producing the optical anisotropic body of the present invention is not limited to other methods, for example, It is possible to form a film with higher film thickness accuracy than forming the liquid crystal polymer layer by spin coating or printing. By heating at the same time, a higher degree of alignment can be obtained. By using the thus obtained optically anisotropic substance in the liquid crystal device of the present invention, linearly polarized light that has passed through one of the pair of polarizing plates passes through at least two layers of the display cell and the optically anisotropic substance. Therefore, about 400 nm to 700
In the wavelength range of nm, the elliptically polarized light is substantially uniform in the major axis direction. Therefore, when passing through the other polarizing plate, the specific wavelength range is not blocked, and as a result, the light after passing through the polarizing plate becomes a color close to white. Examples of the present invention will be shown below.

[0016]

EXAMPLES The optically anisotropic transparent substrate of the present invention may have an orientational strain at the time of film formation, but it is most preferable that it has no optical anisotropy due to its optical anisotropy. For example, an amorphous polymer film obtained by a casting method or a film obtained by a stretching method, a film in which a material having a positive optical anisotropy and a material having a negative optical anisotropy are stacked, or by stretching A film having a very small optical anisotropy, for example, a film obtained by stretching a mixture of a material having a positive optical anisotropy and a material having a negative optical anisotropy is particularly desirable.

The method of aligning the liquid crystal polymer material of the present invention includes a method of directly rubbing a polymer substrate, or
As the aligning agent, an optimum method can be selected in consideration of solvent resistance and heat resistance of the substrate to be coated. Further, not only polyimide but also any aligning agent of other liquid crystal materials can be used. The curing temperature is not limited to the examples.

The phase transition series of the liquid crystal polymer of the present invention preferably transitions to a glass state, a nematic phase or an isotropic liquid phase as the temperature rises. Further, it is desirable that the glass transition temperature is higher than the upper limit temperature of the operating temperature range of the liquid crystal device, and the transition temperature from the nematic phase to the isotropic liquid phase is between 100 ° C and 150 ° C. ..

The liquid crystal polymer of the present invention is a side chain type liquid crystal polymer having an acrylic chain or a methacrylic chain, that is,
A copolymer may be used as long as it is a liquid crystal polymer showing a nematic phase in which a mesogen group is bonded to a skeleton through a spacer of an ethylene chain having at least one carbon atom, and further, another polymer or Also, it can be used as a mixture with other copolymers, and its molecular structure is not limited to the examples.

The temperature for orienting the liquid crystal polymer of the present invention is
The temperature is preferably close to the transition temperature of the nematic-isotropic liquid phase of the liquid crystal polymer, preferably 30 ° C to 150 ° C, more preferably 80 ° C to 130 ° C.

The cooling rate at the time of cooling to room temperature after the alignment of the liquid crystal polymer of the present invention is not particularly limited to the examples. It may be cooled rapidly.

When laminating the liquid crystal polymer precursor of the present invention on a substrate, an optically active compound (hereinafter referred to as a chiral dopant) can be added to a solution in which the precursor is dissolved. That is, when the liquid crystal polymer is laminated, the added chiral dopant is taken into the liquid crystal polymer layer, and the kind and the amount of the chiral dopant are appropriately selected so that the obtained liquid crystal polymer exhibits twist alignment. You can For example, as shown below, if the liquid crystal display cell is a counterclockwise liquid crystal cell, the R body is twisted to the right, or if the display cell is clockwise, the S body is twisted to the left, or the like. Any compound can be used as long as it is an optically active compound containing an asymmetric carbon and is not limited to this example.

[0023]

[Chemical 3]

[0024]

[Chemical 4]

Here, C-15 and S-811 are left-handed chiral dopants manufactured by Merck, CM and CM21 are left-handed chiral dopants manufactured by Chisso, and CB-1.
5, S-1082 are right-handed chiral dopants manufactured by Merck, and CM19, CM20, and CM22 are right-handed chiral dopants manufactured by Chisso. In addition, there is no particular problem when using a compound that is empirically known to be left-handed or right-handed, but even in the case of a compound containing asymmetric carbon, if the twist direction is reversed by temperature, or d-form,
When the twist direction of each l-body is unknown, it can be used after confirming the twist direction. Two or more types may be used for pitch compensation. On the other hand, the chiral dopant is not limited to a low molecular weight compound, and even a polymerized compound does not impair the superiority of the present invention. That is, a polymer compound (a) or (b) having a site having an asymmetric carbon in the skeleton obtained by previously copolymerizing a monomer containing an asymmetric carbon as shown below can also be used.

[0026]

[Chemical 5]

[0027]

[Chemical 6]

When the copolymer exhibits a chiral nematic phase, the copolymer can be used alone by adjusting the twist direction and the angle. Further, even a liquid crystal polymer containing no chiral dopant has a function as an optically anisotropic body, and a display close to black and white can be obtained when the liquid crystal device is assembled.

The chiral dopant used in the present invention preferably has a polymerizable functional group and an optically active site in the skeleton.

[0030]

[Chemical 7]

The optically active site is, for example,

[0032]

[Chemical 8]

And the like can be used. That is, in the solution of the polymer precursor used in the present invention, it is desirable to mix and use a compound having a skeleton containing asymmetric carbon and having a functional group that reacts in a chain.

The liquid crystal device of the present invention includes at least a liquid crystal cell, a polarizing plate, and the optical anisotropic body of the present invention as constituent elements. The polarization axis, the rubbing direction of the liquid crystal cell, and the molecular axis direction of the liquid crystal polymer are not limited to those in this embodiment.

In the liquid crystal device of the present invention, on the transparent substrate of the liquid crystal cell, a color filter, a black stripe for preventing light leakage between electrodes, or a highly efficient transmitted light of the liquid crystal cell. A lens or the like can be provided.

The rubbing method of this embodiment is not limited to the embodiment. That is, in this embodiment, a nylon brush,
Any material that is usually used for aligning liquid crystal molecules, such as cotton and velcade, can be used. Alternatively, a fixed rubbing method may be used.

In the liquid crystal device of the present invention, the polarizing plate can be directly attached on the optically anisotropic body. The liquid crystal device of the present invention may be installed so that the surface on which the optically anisotropic liquid crystal polymer is laminated faces the liquid crystal cell for display, and a protective film may be formed on the surface of the liquid crystal polymer if necessary. May be. Also,
The liquid crystal cell may not be in direct contact with the spacer via the spacer.

The liquid crystal device of the present invention may be constructed so that the polarizing plate is not in direct contact with the optically anisotropic liquid crystal polymer through the spacer.

The surface activation method of the present invention is preferably plasma treatment, but electron beams, ion beams, ultraviolet rays or the like can also be used. Further, it is desirable to perform the treatment in the air or an atmosphere containing oxygen. On the other hand, an inert gas such as helium, neon,
The surface activation treatment can be performed in an atmosphere of argon, xenon, or the like.

As the polymerizable monomer of the nematic liquid crystal polymer in the examples of the present invention, it is desirable to use the one shown below. Moreover, two or more kinds can be mixed and used as needed.

[0041]

[Chemical 9]

(Embodiment 1) A schematic diagram of a cross section of a plasma processing apparatus used in the present invention and a schematic diagram of a method for producing an optically anisotropic body are shown in FIG.
It was shown to. The transparent polyethylene substrate 2-1 was placed on the substrate holder 2-2, and the system was previously evacuated from the gas introduction port 2-3 so that the helium gas became 0.01 Torr and introduced. RF of discharge electrode 2-4 for plasma generation
Was set to 400 W, and the potentials of the ion drawing mesh electrode 2-5 and the ion drawing electrode 2-6 were set to -350V.
Also, the substrate holder is installed so that the inclination angle is about 45 degrees. Voltage was applied for about 3 minutes.

The polyethylene substrate obtained by the above treatment was permeated into a benzene solution in which the monomer was dissolved in 20% by weight to keep the temperature at about 60 ° C., and the polymerization initiator was AI.
It was made to react for 24 hours using BN. The monomer used has the structural formula (1) described above. Further, in order to obtain a twisted nematic liquid crystal, as an optically active compound,
3% of a cholesterol derivative having a methacrylic group and having the structural formula (c) shown below was added.

After completion of the reaction, the obtained polyethylene film was vacuum dried and then dried at 70 ° C., and then subjected to orientation treatment. The thickness of the liquid crystal polymer layer is about 6.5 μm, and Δn
The value of d was 0.83, and the twist angle was 240 degrees right twist.
Further, Δnd in the plane of the film was uniform, and as a result of measurement with a polarization microscope and a spectroscope, it was not possible to determine the difference in retardation corresponding to the unevenness of the thickness of the liquid crystal polymer layer.

On the other hand, a liquid crystal device was manufactured by placing the optically anisotropic body of the present invention in a liquid crystal cell. A schematic cross-sectional view of the present liquid crystal device is shown in FIG. In FIG. 3, a substrate 3-1 having a transparent electrode and an alignment film was attached via a spacer 3-2, and liquid crystal (ZLI4506 manufactured by Merck & Co., Inc.) 3-3 was vacuum-injected between them to form a liquid crystal cell. This optical anisotropic body 3-8,
Make sure that one glass substrate of the liquid crystal cell and the optically anisotropic liquid crystal polymer are not in contact with each other on the liquid crystal cell.
A liquid crystal device was manufactured by installing the liquid crystal device between the four. The orientation direction of the liquid crystal, the absorption axis direction of the polarizing plate, and the molecular long axis direction of the liquid crystal polymer at that time are shown in FIG. In FIG. 4, 4-11 is the rubbing direction of the lower electrode substrate of the display cell, 4-12 is the rubbing direction of the upper electrode substrate of the display cell, and 4-13 is the inside of the plasma device in FIG. 2 of this embodiment. Ion flow direction or substrate rubbing direction, 4-14 is the major axis direction of liquid crystal molecules adjacent to the upper polarizing plate of the liquid crystal polymer on the plastic substrate, 4-15 is the polarizing axis (absorption of the lower polarizing plate. Axis direction, 4-16 is the direction of the polarization axis (absorption axis) of the upper polarizing plate, 4-17 is the magnitude of the twist angle of the liquid crystal display cell, 4-18 is the direction 4-13 and 4-12. 4-19 is the angle between 4-16 and 4-14
-20 is an angle formed by the direction 4-11 and the direction 4-15, 4-
21 is an angle formed by the direction 4-14 and the direction 4-13.
The conditions were set as follows. Angle 4-18 is between 80 and 100 degrees and angle 4-19 is between 40 and 50 degrees. When an electric field was applied to this liquid crystal device, uniform black and white display was obtained over a wide range.

(Example 2) A polyethylene terephthalate substrate obtained by a transparent casting method was used in the same plasma generator as in Example 1. 0.0 for helium
The inside of the system was evacuated and introduced so as to be 01 Torr. RF of discharge electrode 2-4 for plasma generation is set to 4
It was set to 50 W, and the potentials of the ion drawing mesh electrode 2-5 and the ion drawing electrode 2-6 were set to -350V. The tilt angle of the substrate holder is set to about 20 degrees. Voltage was applied for about 3 minutes.

The polyethylene terephthalate substrate obtained by the above treatment was soaked in a benzene solution containing 20% by weight of a monomer, the temperature was kept at about 55 ° C., and AIBN was used as a polymerization initiator to react for 24 hours. Let The monomer used was 50: 5 of (1) and (3) shown above.
It is a mixture of 0. In order to obtain a twisted nematic liquid crystal, a small amount of a cholesterol derivative having a structural formula shown in (c) having a methacryl group was added as an optically active compound.

After completion of the reaction, the obtained polyethylene film was vacuum dried and then dried at 70 ° C., and then subjected to orientation treatment. The thickness of the liquid crystal polymer layer is about 6.3 μm, and Δn
The value of d was 0.85, and the twist angle was 240 degrees right twist.
Further, Δnd in the plane of the film was uniform, and as a result of measurement with a polarization microscope and a spectroscope, it was not possible to determine the difference in retardation corresponding to the uneven thickness of the liquid crystal polymer layer. This film was attached to a liquid crystal cell in the same manner as in Example 1, and a liquid crystal cell was produced. When an electric field was applied, uniform black and white display was obtained over a wide range.

Example 3 PVDF (Polyvinylidene Fluoride): PMMA (Polymethyl Methacrylate) 2
The stretched film made of the 0:80 mixture was subjected to activation treatment on the film surface under the same conditions as in Example 1 with the same apparatus as in Example 1 with the substrate inclination angle set to 0 °. The film obtained by the above treatment was allowed to penetrate into a methanol solution in which a monomer was dissolved in 20% by weight to maintain the temperature at about 15 ° C., and the reaction was carried out for 72 hours using benzoyldimethylaniline peroxide as a polymerization initiator. Let The monomer used is a 50:50 mixture of (1) and (2) shown above. In order to obtain a twisted nematic liquid crystal, a small amount of a cholesterol derivative having a structural formula shown in (c) having a methacryl group was added as an optically active compound.

After completion of the reaction, the obtained film was vacuum dried and then dried at 70 ° C. and then subjected to orientation treatment. The thickness of the liquid crystal polymer layer is about 7 μm, the value of Δnd is 0.85,
The twist angle was about 240 degrees right twist. Further, Δnd in the plane of the film was uniform, and as a result of measurement with a polarization microscope and a spectroscope, it was not possible to determine the difference in retardation corresponding to the uneven thickness of the liquid crystal polymer layer. This film was attached to a liquid crystal cell in the same manner as in Example 1, and a liquid crystal cell was produced. When an electric field was applied, uniform black and white display was obtained over a wide range.

Example 4 A film made of polyethylene was soft rubbed in the same manner as in the rubbing method for liquid crystal cells, and the same apparatus as in Example 1 was used to set the tilt angle of the substrate to 0 °.
The film surface was activated under the same conditions as in Example 2. The polyethylene terephthalate substrate obtained by the above treatment was permeated into a methanol solution in which a monomer was dissolved in 18% by weight to keep the temperature at about 15 ° C, and benzoylperoxydimethylaniline peroxide was used as a polymerization initiator.
The reaction was carried out for 2 hours. The monomer used has the structural formula (1) shown above. Further, in order to obtain a twisted nematic liquid crystal, a small amount of a 2-methylbutanol derivative having a structural formula shown in (b) having a methacryl group was added as an optically active compound.

After completion of the reaction, the obtained film was vacuum dried, dried at 70 ° C., and then subjected to orientation treatment. The thickness of the liquid crystal polymer layer is about 6 μm, the value of Δnd is 0.85,
The twist angle was about 240 degrees right twist. Further, Δnd in the plane of the film was uniform, and as a result of measurement with a polarization microscope and a spectroscope, it was not possible to determine the difference in retardation corresponding to the uneven thickness of the liquid crystal polymer layer. This film was attached to a liquid crystal cell in the same manner as in Example 1, and a liquid crystal cell was produced. When an electric field was applied, uniform black and white display was obtained over a wide range.

(Example 5) A polyethylene film was soft rubbed in the same manner as in the rubbing method for liquid crystal cells, and UV irradiation was performed using a belt exposure machine manufactured by Oak Co. The polyethylene terephthalate substrate obtained by the above treatment was permeated into a methanol solution in which a monomer was dissolved in 18% by weight to keep the temperature at about 15 ° C., and benzoyl peroxide was used as a polymerization initiator for 72 hours. It was made to react. The monomer used has the structural formula (2) described above. Further, in order to obtain a twisted nematic liquid crystal, a small amount of a 2-methylbutanol derivative having a structural formula shown in (b) having a methacryl group was added as an optically active compound.

After the completion of the reaction, the obtained film was vacuum dried, dried at 70 ° C., and then subjected to orientation treatment. The thickness of the liquid crystal polymer layer is about 6 μm, the value of Δnd is 0.85,
The twist angle was about 240 degrees right twist. Further, Δnd in the plane of the film was uniform, and as a result of measurement with a polarization microscope and a spectroscope, it was not possible to determine the difference in retardation corresponding to the uneven thickness of the liquid crystal polymer layer. This film was attached to a liquid crystal cell in the same manner as in Example 1, and a liquid crystal cell was produced. When an electric field was applied, uniform black and white display was obtained over a wide range.

[0055]

According to the present invention, not only can a liquid crystal device having a wide viewing angle and a high contrast and excellent uniformity of black and white display performance be manufactured at low cost, but also a liquid crystal display that is small in size and light in weight and low in cost can be provided. it can. Also, a light modulator,
Widely applicable to LCD TVs, LCD shutters, etc.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a conventional two-layer type super twist nematic liquid crystal device and a film compensation type liquid crystal device.

FIG. 2 is a schematic view of a cross section of a plasma processing apparatus in Examples 1, 2, 3, and 4 of the present invention and a method of manufacturing an optical anisotropic body of the present invention.

FIG. 3 is a schematic cross-sectional view of a liquid crystal device using the optical anisotropic bodies according to Examples 1, 2, 3, 4, and 5 of the present invention.

FIG. 4 is a diagram showing the alignment direction of the liquid crystal, the absorption axis direction of the polarizing plate, and the molecular long axis direction of the liquid crystal polymer in Examples 1, 2, 3, 4, and 5 of the present invention. ..

[Explanation of symbols]

1-1 Transparent substrate 1-2 Spacer 1-3 Liquid crystal 1-4 Polarizing plate 1-5 Liquid crystal cell 1-6 Display cell 1-7 Uniaxially stretched film 2-1 Substrate 2-2 Substrate holder 2-3 Gas inlet 2 -4 Discharge electrode 2-5 Ion extraction mesh 2-6 Ion extraction electrode 3-1 Transparent substrate 3-2 Spacer 3-3 Liquid crystal 3-4 Polarizing plate 3-8 Optical anisotropic body 4-11 Lower side of display cell Rubbing Direction of Electrode Substrate 4-12 Rubbing Direction of Upper Electrode Substrate of Display Cell 4-13 Direction of Ion Flow in Plasma Device in FIG. 2 of this Example, or Rubbing Direction of Substrate 4-14 Liquid Crystal on Plastic Substrate Longitudinal direction of liquid crystal molecules adjacent to polymer upper polarizing plate 4-15 Direction of polarization axis (absorption axis) of lower polarizing plate 4-16 Direction of polarization axis (absorption axis) of upper polarizing plate 4-17 Display Size of twist angle of cell 4-18 Angle formed by direction 4-13 and direction 4-12 4-19 Angle formed by direction 4-16 and direction 4-14 4-20 Direction 4-11 and direction 4-15 Angle formed by 4-21 angle formed by direction 4-14 and direction 4-13

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location G02F 1/1335 505 7811-2K

Claims (13)

[Claims] 1. A transparent substrate having the general formula: ## STR1 ## In an optical anisotropic body formed of a liquid crystal polymer containing at least one component represented by the formula, the liquid crystal polymer and the substrate are chemically bonded at the interface thereof. .. 2. The optically anisotropic medium according to claim 1, wherein the liquid crystal polymer is a polymer mainly having an acrylic chain in a skeleton and is uniaxially aligned on the transparent substrate. body. 3. The optical anisotropic method according to claim 1, wherein the liquid crystal polymer is a polymer mainly having a methacryl chain in a skeleton and is uniaxially aligned on the transparent substrate. body. 4. The optical element according to claim 2, wherein the liquid crystal polymer contains at least one component of an optically active substance and has a twisted orientation having a helical axis in a direction normal to the substrate. Anisotropy. 5. The optically anisotropic body according to claim 1, wherein the glass transition temperature of the liquid crystal polymer is room temperature or higher. 6. The optically anisotropic body according to claim 5, wherein the transparent substrate is an organic polymer. 7. The optically anisotropic body according to claim 5, wherein the transparent substrate is an oriented polymer substrate obtained by uniaxially or biaxially stretching an organic polymer. 8. In a method for producing an optically anisotropic body in which a liquid crystal polymer having a uniaxial orientation or a twist orientation is formed on a transparent substrate, a step of performing an orientation treatment on the transparent substrate and activating the substrate surface. Step of immersing, the activated transparent substrate is immersed in a solution of a polymerizable monomer, the step of laminating the polymer on the transparent substrate surface, the step of drying, the step of orienting the laminated polymer, the transparent substrate 8. The method for producing an optically anisotropic body according to claim 6, further comprising the step of cooling from the orientation treatment temperature. 9. A method for producing an optically anisotropic body in which a uniaxially or twisted liquid crystal polymer is formed on a transparent substrate, wherein a step of activating the transparent substrate surface and an alignment treatment are carried out. After performing the step at the same time, the activated transparent substrate is immersed in a solution of a polymerizable monomer, the step of laminating the polymer on the transparent substrate surface, the step of drying, the step of orienting the laminated polymer, Cooling the transparent substrate from the orientation treatment temperature.
A method for producing the described optically anisotropic body. 10. The step of simultaneously activating the substrate surface and carrying out the alignment treatment is arranged such that the distance from the surface activation energy source to the substrate surface is different at two points on the surface, and the activation energy source is provided. 10. The method for producing an optical anisotropic body according to claim 9, which is a step of imparting a liquid crystal alignment ability to the substrate surface of the liquid crystal cell by providing a short distance from the substrate surface to the substrate surface. 11. In a method for producing an optically anisotropic body in which a uniaxially or twisted liquid crystal polymer is formed on a transparent substrate, the step of aligning the surface of the substrate is a rubbing method. The method for producing an optically anisotropic body according to claim 8. 12. A liquid crystal device comprising a liquid crystal cell in which liquid crystal is sandwiched between substrates on which electrodes are formed, at least one optically anisotropic body, at least one polarizing plate, a liquid crystal driving driver and a liquid crystal driving circuit. 12. The liquid crystal device having an optical anisotropic body according to claim 10, wherein the optical anisotropic body is installed on at least one surface of a liquid crystal cell. 13. The optical anisotropic body according to claim 11, wherein the transparent substrate of the optical anisotropic body and one transparent substrate of the liquid crystal cell are in close contact with each other. Liquid crystal device.