JPH0443325A - Ferroelectric liquid crystal element - Google Patents

Abstract

PURPOSE:To obtain the ferroelectric color liquid crystal element which has a superior color tone by holding a ferroelectric liquid crystal material in the gap between a couple of opposite liquid crystal support plates which have films of specific polyamide. CONSTITUTION:At least one liquid crystal support plate 15 is coated with polyamide to a 0.5 - 30nm film thickness, an orientation process is carried out to form an orientation control film 13, and an amine compound is added preferably to pyrimidine-based liquid crystal. Therefore, molecules of polyamide or its aggregate are oriented excellently and when the liquid crystal element is formed by using this orientation control film 13, uniform orientation is easily obtained over the entire surface of the liquid crystal element. Consequently, the large- sized color liquid display device which has the superior color tone is obtained.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a ferroelectric liquid crystal element.

Conventional technology Conventionally, as a technology for controlling the orientation of molecules and their aggregates, etc., in liquid crystal elements, polyamide such as polyamic acid is applied to the substrate, and the surface of the polyimide is imidized at a high temperature of around 250°C with a cloth or the like. An alignment control film that has been subjected to a rubbing treatment in which alignment is controlled by rubbing is mainly used.

Problems to be Solved by the Invention Rubbing treatment, which is one of the methods for controlling the orientation of liquid crystal molecules in liquid crystal elements, is a simple method that can be carried out at low cost. Polyimide having a thickness of about 30 to 1100 nm is used as the alignment control film. However, in liquid crystal devices using ferroelectric liquid crystals that require bistability in the orientation direction of molecules, the above-mentioned alignment control film has the problem of insufficient expression of this bistability. there were. Furthermore, since polyimide is generally insoluble in solvents, in order to use polyimide as an alignment control film for liquid crystal devices, a solution of polyamide such as polyamic acid, which is a precursor of polyimide, must be applied onto a glass substrate using a method such as spinner coating. , 250°
Color filters used in the production of color liquid crystal devices generally have a low heat resistance, and the conventional polyimide film formation method narrows the selection range of color filters, making it difficult to produce color filters with excellent color tone. The problem was that it was difficult to realize a color liquid crystal element.

The present invention solves these problems and aims to provide a ferroelectric color liquid crystal element with excellent color tone by forming an alignment control film that exhibits the bistability of 3 ferroelectric liquid crystals at a low temperature. This is the purpose.

Means for Solving the Problem In order to solve this problem, the ferroelectric liquid crystal element of the present invention has a film thickness of 0.5 to 20 nm on at least one liquid crystal support plate.
Polyamide was coated so as to have an orientation of m, and an alignment control film was obtained by applying an alignment treatment.Furthermore, it was made of pyrimidine-based liquid crystal and an amine compound was added thereto.

Function The present invention is an orientation control IM in which a polyamide coating film is used and the coating film is subjected to an orientation treatment.
An important feature is that the thickness is 0 nm.

By making the film thinner in this manner, it is possible to achieve good orientation of polyamide molecules and their aggregates. Further, when a liquid crystal element is produced using this alignment control ms, uniform alignment can be easily achieved over the entire surface of the liquid crystal element at low cost. Among these, liquid crystal elements using liquid crystals exhibiting ferroelectric properties can achieve uniform alignment at low cost while completely maintaining bistability. Furthermore, since there is no need to thermally bake the coating film, the selection range of color filters can be expanded when colorizing the liquid crystal element.

EXAMPLE Hereinafter, an alignment control film according to an example of the present invention and a liquid crystal device using the same will be described with reference to the drawings. 1st
The figure shows the structure of a liquid crystal element using an alignment control film, which is an embodiment of the present invention.As shown in figure 0, indium and tin oxide (hereinafter abbreviated as ITO) are deposited on a substrate 11 made of glass, plastic, etc. A transparent electrode 12 consisting of a transparent electrode 12 is formed thereon, and an orientation control layer 12 is formed thereon. [After forming 1M13, an alignment treatment is performed, a spacer/sealing resin 14 is printed, and two liquid crystal support plates 15 are formed.
were bonded together, liquid crystal 16 was injected through the opening, and the opening was sealed to produce a so-called ferroelectric liquid crystal cell. The ferroelectric liquid crystal device thus completed can be produced by adding one or a mixture of amines such as cyclohexylamine, benzylamine, phenylpropylamine, benzylethanolamine, and polyoxypropylene polyamine to the ferroelectric liquid crystal to be injected. It can maintain bistability for a long period of time.

(Example 1) Commercially available wholly aromatic polyamic acid (RN7 manufactured by Nissan Chemical Co., Ltd.)
15) was diluted with a special thinner to prepare a 0.3% by weight polyamic acid solution. This solution was then diluted with [TO
A spinner was used to attach the glass substrate with the electrode pattern for 25 minutes.
Spin coating was carried out for 1 minute at 00 revolutions/minute. 80 after application
Dry at ℃ for 15 minutes to evaporate the solvent and prepare 2! of polyamic acid. The thickness of the film formed on the surface of the glass substrate is 6n.
It was m. Thereafter, the surface on which the polyaminic acid coating was formed was rubbed 10 times in the same direction using a rayon cloth to perform a rubbing treatment to complete an orientation control film. Two glass liquid crystal support plates each having one polyamic acid alignment control film formed thereon are prepared in this way, and an alignment control film is formed on one of the support plates (for example, the lower liquid crystal support plate 22) as shown in FIG. A spacer/sealing resin 25 with a diameter of 2
Acid anhydride-curing epoxy resin with μm glass RAM dispersed in it was printed leaving a 5-mm width in the center of one side, and 0.2mm width on the other periphery, and then the upper liquid crystal support was printed. Board 2
The rubbing directions 23 and 24 of the alignment control films formed on 1 and the lower support plate 22 were parallel to each other, and the surfaces of the alignment control films were pressed against each other and heated at 140° C. for 4 hours to cure and bond. After adhesion, the support plate is heated to the temperature at which the liquid crystal exhibits isotropy, that is, around 80°C, and the liquid crystal (manufactured by Merck & Co., Ltd.,
(trade name: ZLI3654) was injected. After injection, it was slowly cooled to room temperature and the opening was sealed with a commercially available acid anhydride-curable epoxy resin to complete a ferroelectric liquid crystal cell. The ferroelectric liquid crystal cell completed in step 2 showed a good alignment state with no alignment unevenness, and when voltage was applied, good electro-optical properties with bistability maintained were obtained.

(Example 2) Commercially available wholly aromatic polyamic acid (RN7 manufactured by Nichikagaku Co., Ltd.)
Prepare two glass liquid crystal support plates on which are formed orientation control films of polyamic acid that have been subjected to alignment treatment using the same procedure as in Example 1 using 15), and as shown in FIG. A spacer/sealing resin 25 with a diameter of 2t is placed on the surface of the lower liquid crystal support plate 22) on which the alignment control film is formed. m
1 UV-curable epoxy resin with glass fibers dispersed in it.
After printing with a width of 5 cm left in the center of the sides and printing with a width of 0.2 cm around the other edges, rubbing the alignment control film formed on the upper liquid crystal support plate 21 and the lower support plate 22. Processing direction 2
3.24 were parallel and the orientation control film surfaces were placed opposite each other, pressure was applied, and ultraviolet rays were irradiated to cure and bond. After adhesion, the support plate is heated to the temperature at which the liquid crystal exhibits isotropy, that is, around 80°C, and the liquid crystal (manufactured by Merck & Co., trade name: ZLI365) is inserted through the opening.
4) was injected. After injection, the solution was slowly cooled to room temperature and the opening was sealed with a commercially available UV-curable epoxy resin to complete a ferroelectric liquid crystal cell. The ferroelectric liquid crystal cell thus completed showed a good alignment state with no alignment unevenness, and when voltage was applied, good electro-optical properties with bistability maintained were obtained.

(Example 3) A commercially available polyamic acid (RN715, manufactured by Nichikagaku Co., Ltd.) was diluted with a special thinner to prepare a 1.0% by weight polyamic acid solution. Next, this solution was spin-coated for 1 minute at 2500 revolutions/minute using a spinner onto a glass substrate on which an ITO electrode pattern was formed. After coating, it was dried at 80° C. for 15 minutes to evaporate the solvent and form a coating film of polyamic acid on the surface of the glass substrate. The film thickness was 20 nm. The ferroelectric liquid crystal cells produced by the same operations as those in Specific Example 1 and Specific Example 2 below exhibited a good alignment state with no alignment unevenness, and when voltage was applied, a good alignment state with maintained bistability was obtained. Electro-optical properties were obtained.

(Example 4) Using commercially available polyamic acid (RN715 manufactured by Nichikagaku Co., Ltd.), Example 1 and Specific Example 2 were prepared.
A liquid crystal (manufactured by Merck & Co., trade name: ZLI3654) to which 0.1 weight percent of cyclohexylamine was added as an additive was injected into a ferroelectric liquid crystal cell prepared in the same manner as above.

The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 5) 0.30% benzylamine was added as an additive to a ferroelectric liquid crystal cell prepared in the same manner as in Examples 1 and 2 using commercially available polyamic acid (RN715 manufactured by Nichikagaku Co., Ltd.). A liquid crystal (manufactured by Merck & Co., trade name: ZLI3654) added in weight percent was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 6) A ferroelectric liquid crystal cell I was prepared using a commercially available polyamic acid (RN7 manufactured by Nichikagaku Co., Ltd.) in the same manner as in Examples 1 and 2. Liquid crystal containing 0.1% by weight of polyoxypropylene diamine (manufactured by Merck & Co., trade name: ZLI)
3654) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness,
By applying a voltage, good electro-optical properties with maintained bistability were obtained, and the bistability was maintained for a long period of time.

(Example 7) Polyoxypropylene with a molecular weight of 230 was added as an additive to a ferroelectric liquid crystal cell prepared in the same manner as in Examples 1 and 2 using commercially available polyamic acid (RN715 manufactured by Nichikagaku Co., Ltd.). 0.3 diamine
Liquid crystal with added weight% (manufactured by Merck & Co., trade name ZLI365)
4) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 8) Commercially available polyamic acid (SE4110 manufactured by Nissan Chemical Co., Ltd.) was diluted with a special thinner to give a concentration of 0.3% by weight.
A solution of polyamic acid was prepared. After that, Example 1
A coating film of polyamic acid was formed on a glass substrate on which an ITO pattern was formed by spin coating under the same conditions as described above.

The film thickness was 6 nm. Hereinafter, by the same operation as in Example 1 and Example 2, the liquid crystal (
Manufactured by Merck.

(trade name: ZLI3654) was injected. The ferroelectric liquid crystal cell thus completed showed a good alignment state with no alignment unevenness, and when voltage was applied, good electro-optical properties with bistability maintained were obtained.

(Example 9) Commercially available polyamic acid (SE4110 manufactured by Nissan Chemical Co., Ltd.) was diluted with a special thinner to give a concentration of 1.0% by weight.
A solution of polyamic acid was prepared. After that, Example 1
A coating film of polyamic acid was formed on a glass substrate on which an ITO pattern was formed by spin coating under the same conditions as described above.

The film thickness was 20 nm.

Thereafter, a liquid crystal (manufactured by Merck & Co., trade name: ZLr3654) was injected into the produced ferroelectric liquid crystal cell by the same operations as in Specific Example 1 and Specific Example 2. The ferroelectric liquid crystal cell thus completed showed a good alignment state with no alignment unevenness, and when voltage was applied, good electro-optical properties with bistability maintained were obtained.

(Example 10) 0.1 weight of cyclohexylamine was added as an additive to a ferroelectric liquid crystal cell prepared in the same manner as in Examples 1 and 2 using commercially available polyamic acid (SE4110 manufactured by Nissan Chemical Co., Ltd.). % added liquid crystal (
Merck & Co., trade name ZLI3654) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 11) 0.3% by weight of hensylamine was added as an additive to a ferroelectric liquid crystal cell prepared using commercially available polyamic acid (SE4110 manufactured by Nissan Chemical Co., Ltd.) in the same manner as in Examples 1 and 2. The added liquid crystal (manufactured by Merck & Co., trade name: ZLI3654) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 12) Polyoxypropylene diamine with a molecular weight of 400 was added as an additive to a ferroelectric liquid crystal cell prepared in the same manner as in Examples 1 and 2 using commercially available polyamic acid (SE4110 manufactured by Nissan Chemical Co., Ltd.). 0.
Liquid crystal containing 1% by weight (manufactured by Merck & Co., trade name zLr36)
54) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 13) Polyoxypropylene diamine with a molecular weight of 230 was added as an additive to a ferroelectric liquid crystal cell prepared using commercially available polyamic acid (SE4110 manufactured by Nissan Chemical Co., Ltd.) in the same manner as in Examples 1 and 2. 0,
Liquid crystal containing 3% by weight (manufactured by Merck & Co., trade name: ZLI36)
54) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 14) 0.5 g of N-alkoxymethyl modified nylon was heated to 99.9%.
Dissolved in 5 g of methyl alcohol, 0.5% N-
A methanol solution of alkoxymethyl-modified nylon was prepared. Next, this solution was spin-coated for 1 minute at 2500 revolutions/minute onto a glass substrate on which an ITO electrode pattern was formed. v! After washing, the cloth was dried at 110 DEG C. for 30 minutes to evaporate the solvent and form a coating film of N-alkoxymethyl modified nylon on the surface of the glass substrate. The film thickness was 10 nm. After that, the y! The surface on which the film was formed was rubbed 10 times in the same direction using a rayon cloth to complete an orientation control film. Two glass liquid crystal support plates on which alignment control films of N-alkoxymethyl-modified nylon are formed are prepared in this way, and one of the support plates (for example, the lower liquid crystal support v
On the surface on which the orientation control film of i22) is formed, an acid anhydride-curing epoxy resin in which glass fibers with a diameter of 2 μm are dispersed is applied as a spacer/sealing resin 25 in the center of only one side.
After printing with a width of 0.2 on the other peripheries, leaving a width of 1,
The rubbing directions 23 and 24 of the alignment control films formed on the upper liquid crystal support plate 21 and the lower support plate 22 are parallel to each other, and the surfaces of the alignment control films are pressed and heated at 140° C. for 4 hours to cure. Glued. After bonding, the support plate is heated to a temperature at which the liquid crystal exhibits isotropy, that is, around 80°C, and the liquid crystal (manufactured by Merck & Co., Ltd.) is inserted through the opening.

(trade name: ZLI3654) was injected. After injection, it was slowly cooled to room temperature and the opening was sealed with a commercially available acid anhydride-curable epoxy resin to complete a ferroelectric liquid crystal cell.

The ferroelectric liquid crystal cell thus completed showed a good alignment state with no alignment unevenness, and when voltage was applied, good electro-optical properties with bistability maintained were obtained.

(Example 15) Example 14 using N-alkoxymethyl modified nylon
Prepare two glass liquid crystal support plates on which are formed alignment control films of N-alkoxymethyl modified nylon that have been subjected to alignment treatment in the same manner as above, and as shown in Figure 2, one of the support plates (
For example, on the surface of the lower liquid crystal support plate 22) on which the alignment control film is formed, an ultraviolet curing epoxy resin in which glass fibers with a diameter of 2 μm are dispersed is applied as a spacer/sealing resin 25, leaving a width of 5 m in the center of only one side. After printing with a width of 0.2 m on the other periphery, the rubbing directions 23 and 24 of the alignment control films formed on the upper liquid crystal support plate 21 and the lower support plate 22 are parallel and the alignment side 'a film surfaces are opposite to each other. In this state, pressure was applied and ultraviolet rays were irradiated to cure and bond.

After bonding, the support plate is heated to the temperature at which the liquid crystal exhibits isotropy, that is, around 80'C, and the liquid crystal (manufactured by Merck & Co., Ltd.,
(trade name: ZLI3654) was injected. After injection, the solution was slowly cooled to room temperature and the opening was sealed with a commercially available UV-curable epoxy resin to complete a ferroelectric liquid crystal cell. The ferroelectric liquid crystal cell thus completed showed a good alignment state with no alignment unevenness, and when voltage was applied, good electro-optical properties with bistability maintained were obtained.

(Example 16) 1:Og N-alkoxymethyl modified nylon with 99.
Dissolved in 0g of methyl alcohol, 1.0% by weight of N-
A methanol solution of alkoxymethyl-modified nylon was prepared. Next, this solution was spin-coated for 1 minute at 2500 rpm on a glass substrate on which an ITO electrode pattern was formed. After coating, it was dried at 110°C for 30 minutes to evaporate the solvent and form a coating film of N-alkoxymethyl modified nylon on the surface of the glass substrate. The film thickness was 20 nm. The ferroelectric liquid crystal cells produced by the same operations as in Examples 14 and 15 exhibited a good alignment state with no alignment unevenness, and when voltage was applied, good electro-optical properties with bistability maintained were obtained. Obtained.

(Example 17) Using N-alkoxymethyl modified nylon, Example 1
4 and Example 15 to which 0.0.0.
Liquid crystal containing 1% by weight (manufactured by Merck & Co., trade name: ZL136)
54) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 1 day) Using N-alkoxymethyl modified nylon, Example 1
4 and Example 15 to which 0.3% by weight of benzylamine was added as an additive to a ferroelectric liquid crystal cell (manufactured by Merck & Co., Ltd.).

(trade name: ZLI3654) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 19) Using N-alkoxymethyl modified nylon, Example 1
4 and Example 15, 0.1! of polyoxypropylene diamine with a molecular weight of 400 was added as an additive to a ferroelectric liquid crystal cell prepared by the same procedure as in Example 15. A liquid crystal (manufactured by Merck & Co., trade name: ZL I 3654) was injected. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties that maintain bistability are obtained, and it is also bistable for a long period of time. gender was preserved.

(Example 20) Using N-alkoxymethyl modified nylon, Example 1
A liquid crystal (manufactured by Merck & Co., trade name: ZLI3654) containing 0.3% by weight of polyoxypropylene diamine having a molecular weight of 230 as an additive was injected into a ferroelectric liquid crystal cell prepared in the same manner as in Example 4 and Example 15. The ferroelectric liquid crystal cell completed in this way exhibits a good alignment state with no alignment unevenness, and when a voltage is applied, good electro-optical properties with ensured bistability are obtained, and furthermore, it can remain stable for a long period of time. Stability was maintained.

(Comparative Example 1) Commercially available Boria Mink M (RN715, manufactured by Nichijo Kagaku Co., Ltd.) was diluted with a special thinner to prepare a 1.5% by weight polyamic acid solution. Thereafter, spin coating was performed under the same conditions as in Example 1. A coating film of polyamic acid was formed on the glass substrate on which the ITO pattern was formed.The film thickness was 30 nm.

In the following, the fabricated ferroelectric liquid crystal cell was subjected to the same operations as in Example 2 and Example 2, and the twisted alignment state (Comparative Example 2) was obtained.
) A commercially available polyamic acid (RN715, manufactured by Nissei Kagaku Co., Ltd.) was diluted with a special thinner to prepare a 3.0% by weight polyamic acid solution. Thereafter, spin coating was performed under the same conditions as Example 17 [A coating film of polyamic acid was formed on the glass substrate on which the TO pattern was formed. W
4 thickness was 50 nm.

The ferroelectric liquid crystal cell produced by the same operations as in Examples 1 and 2 showed a twisted alignment state and did not achieve bistability even after voltage application.

(Comparative Example 3) Commercially available Boria Mink # (SE4110 manufactured by Nissei Kagaku Co., Ltd.) was diluted with a special thinner to 1.5% by weight.
A solution of polyamic acid was prepared. After that, Example 1
A coating film of polyamic acid was formed on a glass substrate on which an ITO pattern was formed by spin coating under the same conditions as described above.

The film thickness was 30 nm.

The ferroelectric liquid crystal cell produced by the same operations as in Specific Example 1 and Specific Example 2 showed a twisted alignment state, and did not realize bistability even after voltage application.

(Comparative Example 4) Commercially available polyamic # (S'E4210, manufactured by Nissei Kagaku Co., Ltd.) was diluted with a special thinner to prepare a 1.5% by weight polyamic acid solution. Thereafter, spin coating was performed under the same conditions as in Example 1 to coat the glass substrate on which the TO pattern was formed. ! ! A film was formed. The film thickness was 50 nm.

The ferroelectric liquid crystal cell produced by the same operations as in Examples 1 and 2 showed a twisted alignment state and did not achieve bistability even after voltage application.

(Comparative Example 5) 1.5 g of N-alkoxymethyl modified nylon was heated to 98.
A methanol solution of 5 g of N-alkoxymethyl modified nylon with % methyl alcohol was prepared. Thereafter, spin coating was performed under the same conditions as in Example 14 to form a coating film of N-alkoxymethyl-modified nylon on the glass substrate on which the ITO pattern had been formed.
The film thickness was 30 nm. The ferroelectric liquid crystal cell produced by the same operations as in Examples 14 and 15 showed a twisted alignment state and did not achieve bistability even after voltage application.

(Comparative Example 6) 3.0g of N-alkoxymethyl modified nylon was heated to 97.0g.
Dissolved in 0g of methyl alcohol, 3.0% by weight of N-
A methanol solution of alkoxymethyl-modified nylon was prepared. Thereafter, spin coating was performed under the same conditions as in Example 14 to form a polyamic acid coating film on the glass substrate on which the ITO pattern was formed. The film thickness was 50 nm. The ferroelectric liquid crystal cell produced by the same operations as in Examples 14 and 15 showed a twisted alignment state and did not achieve bistability even after voltage application.

In the above Examples and Comparative Examples, fully aromatic polyamic acid (manufactured by Nissho Kagaku Co., Ltd., product names RN715 and SE4110) and alcohol-soluble N-alkoxymethyl-modified nylon were used as the polyamide orientation control film. Similar results were obtained when nylon (nylon 6, nylon 66) was used as the polyamide orientation control film.

In addition, in the above Examples and Comparative Examples, a polyimide film was formed directly on a transparent electrode and rubbed, but in the present invention, a polyimide film was formed on a silicon oxide film formed on a transparent electrode to prevent short circuits. It can also be applied when the surface of polyamide is rubbed.

Effects of the Invention As described above, the present invention subjects a coating film of polyamic acid to an alignment treatment to form a liquid crystal alignment control film, and the film thickness is 0.5 nm to 2.0 nm.
Setting the thickness to 0 nm makes it possible to control the orientation of ferroelectric liquid crystal molecules. Furthermore, when this is applied to a liquid crystal element, uniform alignment can be easily achieved over the entire surface of the element at low cost, and a large color liquid crystal display device with excellent color tone can be provided.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a liquid crystal element according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. 11...Substrate, 12...Transparent electrode layer,
1.3...Alignment control film, 14...Spacer/sealing resin, 15...Liquid crystal support plate, 16...
...Liquid crystal, 21... Upper liquid crystal support, 22.
...Lower liquid crystal support plate, 23...Rubbing direction of upper liquid crystal support plate, 24...Rubbing direction of lower liquid crystal support plate, 25...・Spacer and seal resin. Name of agent: Patent attorney Shigeki Awano Haka 1 person + 1 - Ikukure, Katsu 12 - Jimei wo Tsuke 1 + 5 --- Jt Akimu Nakanuki IG - Commandments 1E;

Claims (3)

[Claims] (1) Film thickness of 0.5 nm or more on at least one substrate
A ferroelectric liquid crystal element having a ferroelectric liquid crystal material held in a gap between a pair of opposing liquid crystal support plates having a coating of polyamide subjected to an orientation treatment at 20.0 nm. (2) The ferroelectric liquid crystal element according to claim 1, wherein the liquid crystal substance held in the gap between the opposing liquid crystal support plates is a pyrimidine liquid crystal and exhibits ferroelectricity. (3) The ferroelectric liquid crystal element according to claim (1), wherein an amine compound is added as an additive to the liquid crystal material held in the gap between the opposing liquid crystal support plates.