JP2008111977A - Optical member and liquid crystal display equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical member capable of being reduced to a thin film and excellent also in display properties and durability performance, and a liquid crystal display equipped with the optical member, light in weight and excellent also in display properties and durability performance. <P>SOLUTION: The optical member (101) comprises a glass substrate (11) or a thin film transistor layer or a color filter layer and a polarizer (12) formed on the glass substrate or the thin film transistor layer or the color filter layer, wherein the polarizer (12) contains a complex comprising a molecular tube and a conjugate polymer included in the molecular tube and having absorption in a visible light region, and the complex is formed in an aligned state in a substantially one direction on the glass substrate or the thin film transistor layer or the color filter layer. The liquid crystal display equipped with the optical member is also provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical member in which a polarizer using a complex of a molecular tube and a conjugated polymer is formed, and a liquid crystal display device including the optical member.

  A liquid crystal display device has characteristics of low power consumption, operation at a low voltage, light weight and thinness, and is used in various display devices by taking advantage of these characteristics. The liquid crystal display device is composed of many materials such as a liquid crystal cell, a polarizing plate, a retardation plate, a light collecting sheet, a light diffusion sheet, a light guide plate, a light reflecting sheet, and a brightness enhancement film. Therefore, by reducing the number of films and sheets that make up the liquid crystal display device, or by reducing the thickness of the film or sheet, improvements aimed at improving productivity, reducing weight, increasing brightness, etc. are prosperous. It is done.

  Depending on the application, a product that can withstand severe durability conditions is required. For example, in a liquid crystal display device for a car navigation system, the temperature and humidity in the vehicle in which the liquid crystal display device is placed may increase. Therefore, compared with a monitor for a normal television or personal computer, the temperature and humidity. The conditions are severe. Therefore, for applications such as for car navigation systems, a polarizing plate that is highly durable is required.

  The polarizing plate usually has a structure in which a transparent protective film is laminated on both sides or one side of a polarizer made of a polyvinyl alcohol resin to which a dichroic dye is adsorbed and oriented. The polarizer is manufactured by a method in which a polyvinyl alcohol resin film is subjected to longitudinal uniaxial stretching and dyeing with a dichroic dye, followed by a crosslinking reaction by boric acid treatment, followed by washing with water and drying. As the dichroic dye, iodine or a dichroic organic dye is used. A polarizing plate is formed by laminating protective films on both or one side of the polarizer thus obtained, and the polarizing plate is used by being incorporated in a liquid crystal display device. As the protective film, a cellulose acetate resin film typified by triacetylrose is often used, and the thickness of the protective film is usually about 30 to 120 μm. In addition, an adhesive made of an aqueous solution of a polyvinyl alcohol-based resin is often used for laminating the protective film on the polarizer.

  A polarizing plate in which a protective film made of triacetyl cellulose is laminated on both sides or one side of a polarizer to which a dichroic dye is adsorbed and oriented via an adhesive made of an aqueous solution of a polyvinyl alcohol resin is long under wet heat conditions. When used for a long time, there are problems that the polarization performance is deteriorated and the protective film and the polarizer are easily peeled off.

  Therefore, there is an attempt to configure at least one protective film with a resin other than cellulose acetate. For example, Patent Document 1 describes that, in a polarizing plate in which protective films are laminated on both sides of a polarizer, at least one of the protective films is composed of a thermoplastic norbornene resin having a retardation film function. Yes. Patent Document 2 discloses that a protective film made of an amorphous polyolefin-based resin is laminated on one surface of a polarizer made of a polyvinyl alcohol-based resin film adsorbed and oriented with iodine or a dichroic organic dye, and the other surface. Describes a polarizing plate in which a protective film made of a resin different from an amorphous polyolefin resin, such as a cellulose acetate resin, is laminated. Furthermore, Patent Document 3 describes that a protective film made of a cycloolefin resin is laminated on a polyvinyl alcohol polarizer via an adhesive containing a urethane adhesive and a polyvinyl alcohol resin. Yes.

  However, amorphous polyolefin resins (also referred to as cycloolefin resins) such as norbornene resins have recently been put into practical use and are generally expensive. Amorphous polyolefin resins are easily eroded by organic solvents such as acetone, toluene, and ethyl acetate. Since these organic solvents are used for preparing the pressure-sensitive adhesive, they may remain in the pressure-sensitive adhesive. Furthermore, since the polarizing plate on which the protective film is laminated usually has a film thickness of 100 μm or more, it is difficult to follow the demand for remarkable thinning particularly in small and medium-sized applications.

  For example, OPTIVA manufactured by Nakan Co., Ltd. is known as a commercial product of a coating type thin film polarizing plate utilizing molecular crystallization. In Non-Patent Document 1, a high-concentration aqueous solution of a plurality of planar elliptical dye molecules is prepared using a material developed by OPTIVA, and Supramolecules in which the planar elliptical dye molecules are in columnar form are coated on a substrate. In addition, it is disclosed that a polarizing plate can be obtained by crystallization of the Supramolecules during the drying process. Since the polarizing plate disclosed in Non-Patent Document 1 is a coating type, it is possible to reduce the thickness of the polarizing plate, but it has been pointed out that the degree of polarization is low, it is brittle, and the water resistance is poor.

  In recent years, a supramolecular structure in which a polymer is included with cyclodextrin has been studied (for example, see Non-Patent Document 2). In particular, a molecule-coated electric wire in which a polymer to be included is a conductive polymer has been developed (see, for example, Non-Patent Documents 3 to 6).

  By the way, as a structural example of the polarizing plate in a liquid crystal display device, the following techniques are proposed. That is, in Patent Document 4, a polarizing plate is provided outside the liquid crystal cell as a liquid crystal display device that can avoid deformation of the retardation plate and prevent light leakage due to the deformation, and the retardation plate is disposed inside the liquid crystal cell. Provided liquid crystal display devices have been proposed.

  In Patent Document 5, it is possible to dispose an anisotropic film that can be provided as a polarizing film inside a cell of a liquid crystal display element, and a portion having a predetermined polarization axis at a predetermined position of the liquid crystal display element. As an anisotropic film that functions as a patterned polarizing film, the orientation of the polymerizable dichroic dye is maintained, and a copolymer is formed with other polymerizable monomers to form a hard film An anisotropic film has been proposed.

  In Patent Document 6, as a liquid crystal display device capable of improving the reliability by preventing the deterioration of the liquid crystal layer, the first substrate and the second substrate which are disposed to face each other, and the first substrate, A liquid crystal having a liquid crystal layer sandwiched between the second substrate, a retardation layer provided on the surface of the first substrate on the liquid crystal layer side, and an alignment film provided on the retardation layer In the display device, a liquid crystal display device is proposed in which a protective film that covers the retardation layer is provided between the alignment film and the retardation layer.

  Patent Document 7 discloses a liquid crystal display device capable of improving display characteristics and reducing thickness by forming a retardation layer by aligning liquid crystal inside a cell without providing a new alignment film. A liquid crystal display device in which a reflective portion is formed on a part of one substrate sandwiching a liquid crystal layer, and a color filter and a protective film for protecting the color filter are formed on the liquid crystal layer side of the other substrate, There has been proposed a liquid crystal display device in which a retardation layer made of a liquid crystal polymer is formed on the liquid crystal layer side of the other substrate, and the orientation of the retardation layer is regulated by a color filter or a protective film.

  In Patent Document 8, in a normally black mode transflective liquid crystal display device, the optical retardation of the liquid crystal layer is compensated by the retardation layer formed inside the cell, the coloring problem of white display is solved, and the viewing angle is compensated. As a liquid crystal display device capable of performing such optical compensation, a reflective portion and a transmissive portion are provided, and a liquid crystal display device that displays black in a low voltage state and white in a high voltage state is applied to the liquid crystal layer. A pair of substrates provided with a reflective portion and a transmissive portion, a liquid crystal layer sandwiched between the pair of substrates and having a twist arrangement in which liquid crystal molecules are twisted, and any one of the pair of substrates and the liquid crystal layer There has been proposed a liquid crystal display device having a retardation layer formed between and having a twist alignment in which liquid crystal molecules in the liquid crystal polymer are twisted.

However, even with the above technology, there is still room for improvement in terms of improving the display characteristics, lightness, and durability of the liquid crystal display device.
JP-A-8-43812 JP 2002-174729 A JP 2004-334168 A JP 2000-221506 A JP 2001-133630 A JP 2004-151310 A JP 2004-317611 A JP 2005-141086 A Omura, “Molecular Crystallized Thin Film Polarizer”, Monthly Display, August 2002, p. 17-19 Harada, “Chemistry of Polyrotaxane”, Contemporary Chemistry, March 1997, p. 26-31 Shimomura et al., “Molecular-coated conducting wire using conductive polymer and cyclodextrin”, Polymer Processing, 49 (8), p. 361-365 (2000) T.A. Shimomura et al., “Atomic force microscopic observation of insulated molecular formed by conducting polymer and molecular nanotube”. Chem. Phys. 116 (5), p. 1753-1756 (2002) Shimomura et al., “Molecular-coated wire using molecular nanotubes”, Surface Science, 23 (10), p. 634-640 (2002) Shimomura et al., “Conductive Nanofiber”, Polymer, 55 (3), p. 134-137 (2006)

  The present invention solves the above-described problems, and provides an optical member that can be thinned and has excellent display characteristics and durability, and a liquid crystal display device that includes the optical member and is lightweight and excellent in display characteristics and durability. With the goal.

  The present invention comprises a glass substrate and a polarizer formed on the glass substrate, and the polarizer comprises a molecular tube and a conjugated polymer having absorption in the visible light region enclosed by the molecular tube. The present invention relates to an optical member that includes a composite and is formed on the glass substrate in a substantially oriented state in one direction.

  The present invention also relates to an optical member comprising the above glass substrate and a polarizer, further comprising a thin film transistor layer or a color filter layer formed so as to face the polarizer with the glass substrate interposed therebetween.

  The present invention also relates to an optical member comprising the above glass substrate and a polarizer, further comprising a thin film transistor layer or a color filter layer formed so as to face the glass substrate with the polarizer interposed therebetween.

  The present invention also provides an optical member comprising the above glass substrate and a polarizer, and further comprising a thin film transistor layer or a color filter layer formed so as to face the glass substrate with the polarizer interposed therebetween. The present invention relates to an optical member further comprising a retardation layer formed between the thin film transistor layer or the color filter layer.

  The present invention also provides an optical member comprising the above glass substrate and a polarizer, and further comprising a thin film transistor layer or a color filter layer formed so as to face the glass substrate with the polarizer interposed therebetween, wherein the color filter layer Alternatively, the present invention relates to an optical member further comprising a retardation layer formed so as to face the polarizer with the thin film transistor layer interposed therebetween.

  The present invention includes a thin film transistor layer or a color filter layer, and a polarizer formed on the thin film transistor layer or the color filter layer, and the polarizer is included in the molecular tube and the molecular tube. Including a composite composed of a conjugated polymer having absorption in the visible light region, and the composite is formed on the thin film transistor layer or the color filter layer in a substantially oriented state. The present invention relates to an optical member.

  The present invention also provides an optical member comprising the above-described thin film transistor layer or color filter layer and a polarizer, wherein the retardation layer is formed so as to face the thin film transistor layer or the color filter layer with the polarizer interposed therebetween. It is related with the optical member further provided.

  In each optical member described above, the light absorption peak wavelength of the composite is preferably in the range of 380 to 780 nm.

In each of the above optical members, the conjugated polymer is preferably made of polyaniline.
Furthermore, in each of the optical members described above, the molecular tube is preferably made of an intermolecular crosslinked body of a cyclic compound. In this case, cyclodextrin can be mentioned as a preferred example of the cyclic compound.

  Each optical member described above can be used as at least one cell substrate in a liquid crystal cell. Therefore, the present invention further relates to a liquid crystal display device that includes a liquid crystal cell in which liquid crystal is sealed between a pair of cell substrates, and at least one of the cell substrates is made of any of the optical members described above.

  According to the present invention, by providing a polarizer having a high degree of polarization and excellent mechanical strength and durability, an optical member that can be thinned and has excellent display characteristics and durability, and the optical member that is lightweight. It is possible to provide a liquid crystal display device having excellent display characteristics and durability.

  The present invention provides an optical member comprising a glass substrate and a polarizer formed on the glass substrate. The polarizer includes a complex composed of a molecular tube and a conjugated polymer having absorption in a visible light region enclosed by the molecular tube, and the complex is substantially aligned in one direction. It is formed on a glass substrate. FIG. 1 is a cross-sectional view showing a basic configuration of an optical member of the present invention including a glass substrate and a polarizer. In the optical member 101, a polarizer 12 is formed on a glass substrate 11. In the present invention, being formed on a glass substrate means forming on the surface of the glass substrate directly or via another member.

  The present invention also provides an optical member comprising a thin film transistor layer or a color filter layer and a polarizer formed on the thin film transistor layer or the color filter layer. The polarizer includes a complex composed of a molecular tube and a conjugated polymer having absorption in a visible light region enclosed by the molecular tube, and the complex is substantially aligned in one direction. It is formed on the color filter layer or the thin film transistor layer. 2 and 3 are cross-sectional views showing the basic structure of the optical member of the present invention comprising a thin film transistor layer or color filter layer and a polarizer. In the optical member 201 of FIG. 2, the polarizer 12 is formed on the thin film transistor layer 13, and in the optical member 301 of FIG. 3, the polarizer 22 is formed on the color filter layer 23. In the present invention, to be formed on a thin film transistor layer or a color filter layer means to be formed directly on the surface of the thin film transistor layer or the color filter layer or via another member.

  The polarizer formed in the optical member of the present invention includes a complex (hereinafter also simply referred to as a complex) composed of a molecular tube and a conjugated polymer enclosed by the molecular tube. Are oriented in one direction. In the present invention, the molecular tube means a compound having a tubular molecular structure having a cavity inside, and the conjugated polymer means a polymer compound having conjugated multiple bonds in the molecule. In the composite contained in the polarizer formed in the present invention, the molecular tube encloses the conjugated polymer, so that the conjugated polymer can take a conformation in the cavity of the rigid molecular tube. it can. The polarizer has a high degree of polarization because such a complex is oriented substantially in one direction. Moreover, the handleability at the time of manufacture of a polarizer becomes favorable by taking the conformation which the conjugated polymer extended.

  In particular, when the molecular tube has a self-organizing ability such as liquid crystallinity or crystallinity, the complex can be oriented substantially in one direction by using the self-assembling ability. The polarizer can be formed. In addition, it is known that conjugated polymers are generally susceptible to oxygen and the like. However, in the present invention, the conjugated polymer is covered with a molecular tube. Thus, various durability performances such as heat resistance, moist heat resistance, and water resistance can be obtained satisfactorily. Therefore, the polarizer used in the present invention is singly, for example, by a method such as coating, on a glass substrate, on a thin film transistor layer, or on a color filter layer, directly or through another member. Therefore, according to the present invention, it is possible to obtain an optical member that is lightweight and provides excellent display characteristics and durability.

<Polarizer>
A typical embodiment of the polarizer provided in the optical member of the present invention will be described in detail below.

(Conjugated polymer)
As the conjugated polymer, one conjugated polymer component may be used alone, or two or more conjugated polymer components may be used in combination. Conjugated polymers have absorption in the visible light region, typically in the form of a complex with a molecular tube that provides a light absorption peak wavelength in the visible light region, particularly in the range of 380-780 nm. Preferably molecules are used. Although it is necessary for the conjugated polymer to have absorption in the visible light region in constructing the polarizer of the present invention, even if the conjugated polymer gives a light absorption peak wavelength in the visible light region, Inclusion in the tube may shift the absorption peak in the complex state. Therefore, in defining the polarizer, it is practical to consider the light absorption peak wavelength of the composite. In the present invention, when two or more kinds of conjugated polymer components are used in combination, the light absorption peak wavelength of the composite is a superposition of light absorption spectra derived from each of these two or more kinds of conjugated polymer components. The wavelength at which the absorbance is maximum in the light absorption spectrum. The light absorption peak wavelength can be obtained from, for example, measurement of absorbance using a spectrophotometer.

  When the optical member of the present invention is used in a liquid crystal display device, it is also useful to select the type and combination of conjugated polymer components so that the polarizer has absorption in the visible light region and the ultraviolet region. In this case, since the ultraviolet light absorbing ability is imparted to the polarizer, the liquid crystal molecules can be well protected from the ultraviolet light by the polarizer. When the polarizer is formed in the liquid crystal cell of the liquid crystal display device, the protective effect of the liquid crystal molecules is particularly great.

  When the optical member of the present invention is used in a liquid crystal display device, the type and combination of the conjugated polymer component can be selected so that the polarizer has absorption in a broad wavelength region including almost the entire visible light region. it can. On the other hand, for a liquid crystal cell through which monochromatic light passes, such as a liquid crystal cell serving as a path of light split into the three primary colors of red, green and blue in a liquid crystal projector, for example, each of the above three color wavelength regions. A monochromatic polarizer in which the type and combination of conjugated polymer components are selected so as to have a corresponding absorption wavelength may be formed.

  Specific examples of the conjugated polymer component include trans-polyacetylene, cis-transoid polyacetylene, trans-cisoid polyacetylene, polyacetylene, polyphenylchloroacetylene, polyacetylene series such as poly (1,6-heptadiyne), polyparaphenylene, Polyphenylenes such as polymetaphenylene, polyphenylene vinylene, polyphenylene oxide, polyphenylene selenide, etc., heterocyclic polymers such as polypyrrole, polyselenophenone, polythiophene, polytellurophene, polyfuran, poly 2,5-pyridinediyl, polyaniline, poly Examples thereof include ionic polymer systems such as (3-methyl-4-carboxypyrrole) and ladder polymer systems such as polyacene and polyacenacene. Since each of these conjugated polymer components has a specific absorption wavelength, a polarizer corresponding to each absorption wavelength can be produced. Further, by combining a plurality of conjugated polymer components having different absorption wavelengths, the absorption wavelength can be broadened.

  The conjugated polymer component can be doped with, for example, alkali metals, metal salts, iodine, organic carboxylic acids, sulfonic acids, and the like. In this case, it is advantageous in that a conjugated polymer having a desired absorption wavelength can be obtained relatively easily.

  When a polarizer having an absorption wavelength almost in the entire visible light region is required, the conjugated polymer is particularly preferably made of polyaniline. Depending on its oxidation state, polyaniline is also referred to as leuco emeraldine base (also called reduced polyaniline), emeraldine base (also called basic polyaniline oxidation (I) type), and pernigraniline base (aniline black oxidation (II) type). 3). The leuco emeraldine base has a sharp absorption around 340 nm, the emeraldine base has a broad absorption around 640 nm, and the pernigraniline base has a broad absorption around 540 nm. By appropriately controlling the abundance ratio of the polyaniline having the above three types of structures, for example, in a liquid crystal display device, ultraviolet rays that adversely affect liquid crystal molecules in a liquid crystal cell can be cut, and at the same time, an absorption band over the entire visible light region can be obtained. it can.

  The conjugated polymer is generally insoluble in water, but a conjugated polymer in which a hydrophilic functional group is introduced into the molecule to impart water solubility or water dispersibility can also be preferably used. In the case of using a hydrophilic conjugated polymer, water or a hydrophilic solvent can be used instead of the organic solvent at the time of producing the polarizer, which is preferable from the viewpoint of environmental protection. In the polarizer used in the present invention, since the conjugated polymer is chemically stabilized by being included in the molecular tube, when the water-soluble or water-dispersible property is imparted to the conjugated polymer. However, the water resistance of the polarizer can be maintained well.

  Examples of the hydrophilic functional group include a sulfone group, an amino group, an amide group, an imino group, a quaternary ammonium base, a hydroxyl group, a mercapto group, a hydrazino group, a carboxyl group, a sulfate ester group, a phosphate ester group, or the like. And the like. By introducing a hydrophilic functional group into the molecule of the conjugated polymer, it becomes easier to dissolve in water or disperse in the form of fine particles in water, so that a water-soluble or water-dispersible conjugated polymer can be prepared. it can. In addition, the aqueous solution or aqueous dispersion of the conjugated polymer can contain a hydrophilic solvent in addition to water. Examples of the hydrophilic solvent include methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, n-amyl alcohol, isoamyl alcohol, sec-amyl alcohol, tert-amyl alcohol. And alcohols such as 1-ethyl-1-propanol, 2-methyl-1-butanol, n-hexanol, and cyclohexanol.

  As a preferable molecular weight of the conjugated polymer, a weight average molecular weight in terms of polystyrene is within the range of 5,000 to 500,000. When the weight average molecular weight is 5000 or more, it is advantageous in that the molecular chain is long and the polarization degree and durability of the polarizer are better, and when it is 500,000 or less, a complex of a molecular tube and a conjugated polymer. It is advantageous in that it is excellent in handleability when orienting in substantially one direction.

  The weight average molecular weight in terms of polystyrene of the water-soluble or water-dispersible conjugated polymer is preferably 500,000 or less, more preferably 300,000 or less. When the weight average molecular weight is 500,000 or less, it is advantageous in that good water solubility or water dispersibility can be more easily realized and a complex with a molecular tube can be more easily formed. On the other hand, when the water-soluble or water-dispersible conjugated polymer has a weight average molecular weight in terms of polystyrene of 10,000 or more, and more preferably 50,000 or more, it is preferable from the viewpoint of good polarization degree and durability performance of the polarizer.

  Examples of commercially available water-soluble conjugated polymers include polyaniline sulfonic acid (manufactured by Mitsubishi Rayon Co., Ltd., weight average molecular weight of 150,000 in terms of polystyrene). Examples of commercially available water-dispersible conjugated polymers include polythiophene conductive polymers (manufactured by Nagase Chemtech, trade name: Denatron series).

(Molecular tube)
The molecular tube used in the present invention may be any tube as long as it is in a tube shape and can include a conjugated polymer. The inner diameter of the molecular tube is made larger than the outer diameter of the conjugated polymer. As a method of including a conjugated polymer in a molecular tube, the conjugated polymer is chemically stable in a state of being included in a molecular tube rather than a state in which the conjugated polymer is present alone. And a method for controlling the combination of the molecular structure of the molecular tube. For example, a method of designing the molecular tube and the conjugated polymer so that the site forming the inner wall of the molecular tube and the conjugated polymer have an intermolecular interaction is preferable. More specifically, in the case where a conjugated polymer that is hydrophobic as a whole molecule is included, a hydrophilic structure is formed at the site forming the outer wall of the tube, and a hydrophobic structure is formed at the site forming the inner wall of the tube. A method of combining molecular tubes having the following can be adopted. If the inner diameter of the molecular tube and the outer diameter of the conjugated polymer are close to each other in a combination in which the portion that forms the inner wall of the molecular tube and the conjugated polymer have intermolecular interactions, It is preferable because the molecules are considered to be easily included. For example, when polyaniline is used as the conjugated polymer and an intermolecular crosslinked body of cyclodextrin is used as the molecular tube, an intermolecular crosslinked body of β-cyclodextrin is preferably used.

  In addition, when using a conjugated polymer that combines multiple types of conjugated polymer components for the purpose of broadening the absorption wavelength of the polarizer and imparting ultraviolet absorbing ability to the polarizer, all types of conjugated polymer components In order to ensure good inclusion in the molecular tube, it is preferable to prepare a molecular tube corresponding to the molecular radius of each conjugated polymer component.

  Specific examples of the molecular tube include, for example, an intermolecular cross-linked product of a cyclic compound, and specifically, an intermolecular cross-linked product of cyclodextrin such as α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin, and the like. Can be mentioned. In addition, esters, ethers, ether derivatives and salts of these cyclodextrins can also be used as cyclic compounds.

  The molecular tube used in the present invention can be formed by cross-linking the above cyclic compound in a cylindrical shape. A molecular tube using a cyclic compound as a raw material can be produced according to a known method, and a method of producing the molecular tube according to a method for producing a cyclodextrin polymer described in Japanese Patent No. 3288149 can be employed. To give a more specific example, first, a polyrotaxane having a structure in which a linear molecule is encapsulated in a ring of a cyclic compound such as α-cyclodextrin is prepared by a known method (for example, described in JP-A-6-25307). In the publication, the polyrotaxane is synthesized according to an α-cyclodextrin inclusion compound of a linear molecule). Next, the cyclic compound is intermolecularly cross-linked by a known means such as adding a cross-linking agent of a cyclic compound (for example, α-cyclodextrin) constituting the polyrotaxane. Thereafter, the blocking group of the linear molecule is removed by a known means using alkali or the like, and the molecular tube can be produced by extracting the linear molecule in the polyrotaxane. If desired, after removal of the blocking group, known purification means such as concentration, phase transfer, extraction, crystallization, dialysis, reprecipitation, etc. may be applied.

  In the above method, for example, epichlorohydrin, diisocyanate compound or the like can be used as the crosslinking agent. Further, as the alkali, for example, strong alkali or the like, more specifically sodium hydroxide, potassium hydroxide or the like can be used. Examples of linear molecules include aminated polyalkylene glycols such as polyethylene glycol bisamine, polyalkylene glycols such as polyethylene glycol, polypropylene glycol, and polytetrahydrofuran, and conjugated diene polymers such as polyisoprene and polybutadiene. Polydialkylsiloxanes such as polydimethylsiloxane, polyolefins such as polyethylene, polypropylene, and polyisobutylene can be used.

  Note that the polarizer used in the present invention has a structure in which a conjugated polymer is included in a molecular tube, for example, by measuring the molecular size using an AFM (atomic force microscope) or the like. it can.

(Other ingredients)
The polarizer used in the present invention includes a composite composed of a molecular tube and a conjugated polymer. In addition to the composite, a transparent resin having a binder ability such as an acrylic resin, a urethane resin, a polyester resin, or the like. May be included. In this case, the shape retention ability in the state of the polarizer alone is better.

<Optical member>
In the optical member of the present invention, the polarizer as described above is formed on the glass substrate, the thin film transistor layer, or the color filter layer. As the glass substrate, the thin film transistor layer, and the color filter layer, for example, materials and shapes that are usually used in liquid crystal display devices are appropriately used. For example, amorphous silicon or the like can be used as the thin film transistor layer. A color filter layer having a conventionally known configuration can be appropriately formed corresponding to the pixel region.

  In the present invention, a polarizer may be formed on a glass substrate, a thin film transistor layer, or a color filter layer via an alignment layer for aligning a complex of a molecular tube and a conjugated polymer. As the alignment layer, a layer whose surface is rubbed, a stretched film in which molecules are molecularly oriented in one direction by uniaxial stretching or the like can be preferably used.

  As a material for forming the alignment layer, for example, a known material used as a low molecular liquid crystal aligning agent in a liquid crystal display device can be used. Specific examples include polyvinyl alcohol, various polyamic acids that can be polyimideized by heat treatment, polyimide, lecithin, various carboxylic acid chromium complexes, silane coupling agents, and obliquely deposited films of silicon oxide. Further, as the alignment layer subjected to the rubbing treatment, an alignment layer subjected to the rubbing treatment by a known method used for production of a normal liquid crystal display cell or the like can be used. Note that specific rubbing treatment conditions vary depending on the rubbing cloth to be used, the material of the alignment layer, and the like, and therefore appropriate conditions can be selected for each.

  Since the polarizer used in the present invention has good mechanical strength, the polarizer alone can be incorporated into an optical member. Depending on the application, for example, a transparent resin film is combined on one or both sides of the polarizer. The polarizing plate may be incorporated in the optical member.

  The transparent resin film is preferably transparent and optically isotropic. Specifically, for example, polymethyl methacrylate, polystyrene, polycarbonate, polyether sulfone, cyclic polyolefin, polyarylate, triacetyl cellulose, etc. Examples include cellulose derivatives and colorless and transparent polyimides. The thickness of the transparent resin film can usually be in the range of 0.1 μm to 100 μm, preferably in the range of 1 μm to 50 μm. If the thickness of the transparent resin film is within the above range, there will be no trouble in the final use.

<Method for producing optical member>
Although the typical manufacturing method of the optical member of this invention is demonstrated below, this invention is not limited to this.

  The polarizer used in the present invention includes, for example, a complex forming step for forming a complex composed of a molecular tube and a conjugated polymer included in the molecular tube, and a fluid for preparing a fluid containing the complex. A body-preparing step and a polarizer in which a fluid is applied on a glass substrate, on a thin film transistor layer, on a color filter layer, or on another support substrate, and the composite is oriented substantially in one direction. Can be manufactured by a method including an alignment step of forming. Below, the typical aspect of each process is demonstrated.

(Composite formation process)
As a method for preparing a complex of a molecular tube and a conjugated polymer, a method of including a conjugated polymer in a molecular tube after forming the molecular tube, or a ring part of a cyclic compound that is a raw material of the molecular tube. A method of forming a molecular tube by including a conjugated polymer and then cross-linking the cyclic compound between molecules can be preferably employed.

  First, a method of including a conjugated polymer in a molecular tube after forming the molecular tube will be described below. As a known method for producing a molecular tube, a molecular tube is produced by the method described above, the obtained molecular tube is dissolved in water or an organic solvent, and this is mixed with a solution or dispersion of a conjugated polymer. . The molecular tube used in the present invention has a function of enclosing the conjugated polymer. By selecting a combination of the molecular tube and the conjugated polymer, the conjugated polymer is encapsulated in the molecular tube by mixing as described above. Can be contacted to form a complex. In particular, when the conjugated polymer is mixed with the molecular tube in the state of a dispersion, it is preferable to combine the molecular tube and the conjugated polymer by performing ultrasonic treatment under heating after the above mixing. . Further, after the molecular tube and the conjugated polymer are combined, the terminal of the conjugated polymer or the terminal hole of the molecular tube may be chemically sealed. After the compounding or the end sealing, a known purification means such as concentration, transfer dissolution, extraction, crystallization, dialysis or reprecipitation may be used. By the above method, a complex in which the conjugated polymer is covered with the molecular tube can be obtained by the inclusion of the conjugated polymer in the molecular tube.

  Next, a method for forming a molecular tube by encapsulating a conjugated polymer in the ring of a cyclic compound that is a raw material of the molecular tube and then cross-linking the cyclic compound between molecules will be described. The molecular tube used in this method is in the form of a tube and can include the conjugated polymer in the same manner as the molecular tube used in the method of forming the molecular tube in advance and then combining the molecular tube and the conjugated polymer. Any thing can be used. Specifically, intermolecular cross-linked products of cyclodextrins such as α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin and the like can be mentioned. In addition, esters, ethers, ether derivatives and salts of these cyclodextrins can also be used as the cyclic compound.

  A typical method will be described by taking the case of using cyclodextrin as a cyclic compound as an example. For example, in a known method as described in JP-A-6-25307, a high conjugation is carried out inside a ring of cyclodextrin that is connected in large numbers. After synthesizing the polyrotaxane containing the molecule, the cyclodextrin is cross-linked by a known means such as adding a cross-linking agent, and then the blocking group of the polyrotaxane is removed by a known means using an alkali or the like. Is done. In the present invention, the blocking group may remain in the complex. After intermolecular crosslinking or removal of the blocking group, known purification means such as concentration, phase transfer, extraction, crystallization, dialysis, reprecipitation, etc. may be used.

  As the crosslinking agent, for example, epichlorohydrin, a diisocyanate compound or the like can be used. Further, as the alkali, for example, strong alkali or the like, more specifically sodium hydroxide, potassium hydroxide or the like can be used.

(Fluid preparation process)
Next, the composite produced by the method as described above is oriented substantially in one direction. As a method for orienting the composite, for example, a composite fluid is prepared by melting the composite or dissolving the composite in a solvent, and the fluid is applied to a glass substrate, a thin film transistor layer, a color The method etc. which apply | coat on a filter layer or another support substrate, and form a composite layer etc. may be employ | adopted. In the case of using a fluid obtained by melting the composite, the method of cooling and solidifying after applying the fluid, or in the case of using the fluid obtained by dissolving the composite in a solvent, The composite layers can be formed respectively by a method of drying after applying the fluid. The fluid is preferably a solution in which the complex is dissolved in a solvent capable of dissolving the complex of the conjugated polymer and the molecular tube in that the film thickness uniformity of the complex layer is good.

  The solvent used for the preparation of the above solution is not particularly limited as long as it can dissolve the complex and can be distilled off under appropriate conditions. Generally, ketones such as acetone, methyl ethyl ketone, isophorone, Ether alcohols such as 2-butoxyethyl alcohol, 2-hexyloxyethyl alcohol and 1-methoxy-2-propanol, glycol ethers such as ethylene glycol dimethyl ether and diethylene glycol dimethyl ether, esters such as ethyl acetate, methoxypropyl acetate and ethyl lactate , Phenols such as phenol and chlorophenol, amide solvents such as N, N-dimethylformamide, N, N-dimethylacetamide and N-methylpyrrolidone, halo such as chloroform, tetrachloroethane and dichlorobenzene Down solvents, water, and a solvent mixture of these systems can be used. Further, from the viewpoint of improving the film thickness uniformity of the composite layer, a surfactant, an antifoaming agent, a leveling agent and the like can be appropriately added to the solution.

(Orientation process)
The fluid prepared above is applied on a glass substrate, thin film transistor layer, color filter layer, or other supporting substrate to produce a polarizer in which the composite is oriented substantially in one direction. To do. When the fluid is applied on a support substrate other than a glass substrate, a thin film transistor layer, or a color filter layer, the material of the support substrate is preferably a material that can be rubbed by itself and has heat resistance. Preferred are terephthalate, polyethylene naphthalate, polyphenylene sulfide, polyethersulfone, polyetheretherketone, polyimide, cellulose derivative, and cyclic polyolefin. A long film or a sheet having an appropriate size can be used as the support substrate, but a long film is preferably used from the viewpoint of production efficiency.

  The method of applying the fluid containing the composite on a glass substrate, on a thin film transistor layer, on a color filter layer, or on another supporting substrate is not particularly limited. For example, spin coating, bar coating It is possible to employ a method such as a coating method, a roll coating method, a curtain coating method, and a die coating method such as slot coating or extrusion coating. When using a solution of a composite as a fluid containing the composite, after applying the solution, the solvent is dried and removed by a method such as heating with a heater or blowing with warm air to form a composite layer.

  The substrate to which the fluid containing the composite is applied is preferably an oriented substrate whose surface is substantially oriented in one direction. In this case, by applying a fluid containing the composite on the alignment substrate, the composite is more easily aligned, which is advantageous in that a polarizer having a higher degree of polarization can be easily formed. Such an alignment substrate can be formed, for example, by forming an alignment film on a glass substrate, a thin film transistor layer or a color filter layer and subjecting the surface to a rubbing treatment. It can also be a support substrate made of a resin, a stretched film that is molecularly oriented in one direction by uniaxial stretching or the like.

  In the present invention, in order to make the orientation of the composite composed of the molecular tube and the conjugated polymer closer to perfection, the fluid containing the composite is dried in the above method and then subjected to heat treatment. Also good. The heat treatment temperature in this case cannot be generally stated because the optimum conditions and limit values differ depending on the liquid crystallinity and crystallinity of the complex of the conjugated polymer and the molecular tube to be used. More preferably, it can be in the range of 50 to 250 ° C, and more preferably in the range of 80 to 230 ° C. When the heat treatment temperature is 50 ° C. or higher, the fluidity of the complex of the conjugated polymer and the molecular tube is good, which is advantageous in that the complex can be oriented well. Further, when the heat treatment temperature is 300 ° C. or less, it is advantageous in that decomposition of the complex of the conjugated polymer and the molecular tube hardly occurs.

  The heat treatment time in the heat treatment can be usually in the range of 10 seconds to 2 hours, more preferably in the range of 30 seconds to 1 hour, and still more preferably in the range of 1 minute to 30 minutes. When the heat treatment time is 10 seconds or more, it is advantageous in that a desired alignment state can be satisfactorily completed, and when it is 2 hours or less, it is advantageous in that productivity is good.

  After the heat treatment, the orientation state of the composite can be fixed by cooling the composite layer. The method for cooling the composite layer is not particularly limited. Usually, after performing the heat treatment as described above, the entire orientation of the composite layer formed on the support substrate can be fixed by removing the support substrate on which the composite layer is formed at room temperature. Is possible. Also, depending on the type of complex of the conjugated polymer and the molecular tube, or from the viewpoint of productivity, the orientation state is fixed by using forced cooling means such as cold air blowing or contact with a cooling roll, for example. Also good.

  By the method as described above, a polarizer in which the composite is substantially oriented in one direction can be obtained, but the polarizer is formed on a support substrate made of a resin film other than a glass substrate, a thin film transistor layer, or a color filter layer. It is also useful to carry out stretching as necessary. The film thickness of the polarizer is not particularly limited, and is not particularly limited as long as a desired degree of polarization can be obtained. When the optical member of the present invention is used in a liquid crystal display device, the film thickness is usually 0.1 μm or more, more preferably 0.3 μm or more, and preferably 100 μm or less. When the film thickness is 0.1 μm or more, the film thickness of the polarizer can be controlled with high accuracy, and the function resulting from the structure in which the complex of the conjugated polymer and the molecular tube is oriented is exhibited well. This is advantageous. Moreover, when the film thickness is 100 μm or less, it is advantageous in that the alignment state of the composite is good and a polarizer having a good thickness can be obtained.

(Formation of polarizer on glass substrate, thin film transistor layer or color filter layer)
The polarizer used in the present invention can be directly formed on the glass substrate or the thin film transistor layer or the color filter layer as described above, but when the polarizer has self-supporting property, After forming a polarizer on a support substrate made of a resin film, the support substrate is peeled and removed, and the polarizer can be formed on a glass substrate, a thin film transistor layer, or a glass filter layer. On the other hand, when the polarizer does not have self-supporting property, after forming the polarizer on the glass substrate or the thin film transistor layer or the color filter layer as the supporting substrate or forming the polarizer on the supporting substrate, The polarizer is preferably transferred to a glass substrate, a thin film transistor layer, or a color filter layer, and the supporting substrate is peeled off.

  The method of transferring the polarizer to the glass substrate, the thin film transistor layer or the color filter layer is not particularly limited, but the polarizer formed on the support substrate and the glass substrate, the thin film transistor layer or the color filter layer And the like, and a method of peeling and removing the support substrate after the adhesive is cured as necessary may be preferably employed.

  The method for peeling and removing the support substrate is not particularly limited, but for example, a method of artificially peeling by attaching an adhesive tape to the corner end of the support substrate, or mechanical peeling using a roll or the like. Method, method of mechanical peeling after immersion in a poor solvent for all constituent materials, method of peeling by irradiating ultrasonic waves in the poor solvent, method of peeling by temperature change using difference in thermal expansion coefficient Etc. can be adopted as appropriate.

  There are no particular restrictions on the method of applying the adhesive used for the above-described release transfer, and the adhesive that can be used is not particularly limited, but depending on the end use, Optically isotropic may be desirable. Examples of the optically isotropic adhesive include acrylic adhesives, polyurethane adhesives, ethylene-vinyl acetate copolymer systems, various rubber adhesives, and various reactive adhesives. Can be mentioned. Examples of reactive adhesives include thermosetting, photocurable, or electron beam curable adhesives, and more specifically, those mainly composed of acrylic monomers and oligomers. Can be preferably used. In addition, various photopolymerization initiators, sensitizers, viscosity modifiers, and the like can be added to the adhesive as necessary. The curing method of the reactive adhesive is not particularly limited, and a photocuring method, an electron beam curing method, or the like can be appropriately employed, but it is desirable to carry out within a range that does not impair the orientation state of the polarizer. .

When the reactive adhesive is cured by a photocuring method, a low-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a metal halide lamp, a xenon lamp, or the like can be used as a known curing means. Moreover, since the exposure amount of said hardening means changes with kinds of the reactive adhesive agent to be used, it cannot say unconditionally, Usually, it exists in the range of 50-2000 mJ / cm < ² >, Preferably it is 100-1000 mJ / cm < ² >. Can be within range.

  On the other hand, the acceleration voltage of the electron beam irradiated when the reactive adhesive is cured by the electron beam curing method is appropriately selected depending on the transmission power and curing power of the electron beam and cannot be generally described. However, it can be normally 30 to 1000 kV, preferably 50 to 500 kV.

  The optical member of the present invention can be formed by the method as described above. Below, the example of the preferable structure of the optical member of this invention is demonstrated more concretely.

<Embodiment 1>
An optical member of the present invention comprising a glass substrate as shown in FIG. 1 and a polarizer formed on the glass substrate is a thin film transistor layer formed so as to face the polarizer across the glass substrate. Alternatively, a color filter layer can be further provided.

  FIG. 4 is a cross-sectional view showing the configuration of the optical member according to Embodiment 1 of the present invention. In the optical member 401 shown in FIG. 4, the polarizer 12 is formed on the glass substrate 11, and the thin film transistor layer 13 is formed so as to face the polarizer 12 with the glass substrate 11 interposed therebetween. In the optical member 402, the polarizer 22 is formed on the glass substrate 21, and the color filter layer 23 is formed so as to face the polarizer 22 with the glass substrate 21 interposed therebetween. The optical member of the present invention may be formed with an overcoat for imparting a protective effect. In the optical members 401 and 402 shown in FIG. 4, the overcoat is formed on the thin film transistor layer 13 and the color filter layer 23, respectively. 14 and 24 are formed.

  The thin film transistor layer 13 can be formed of, for example, amorphous silicon. The color filter layer 23 has a conventionally known configuration and is formed corresponding to the pixel region.

  The material used for the overcoats 14 and 24 is not particularly limited as long as it satisfies transparency, mechanical strength, and adhesion to the thin film transistor layer or the color filter layer. Specifically, resins such as acrylic resin, urethane resin, and polyester resin can be suitably used. The overcoat can be applied by applying a transparent resin varnish on the thin film transistor layer or the color filter layer and then removing the solvent, or after applying a solvent-free UV-curable resin or thermosetting resin, It can be formed by a method such as heat treatment.

  The optical member 401 and the optical member 402 according to the present invention can be used in combination as an optical member for a liquid crystal display device, for example. A typical configuration of the liquid crystal display device will be described later. For example, the optical member 401 and the optical member 402 are arranged so that the thin film transistor layer 13 of the optical member 401 and the color filter layer 23 of the optical member 402 face each other. A liquid crystal display device can be formed by arranging and providing a liquid crystal layer, an alignment film, an electrode and the like between the optical member 401 and the optical member 402 in a conventionally known manner. The polarizer 12 of the optical member 401 and the polarizer 22 of the optical member 402 are usually arranged so that their absorption axes are orthogonal to each other.

<Embodiment 2>
An optical member of the present invention comprising a glass substrate as shown in FIG. 1 and a polarizer formed on the glass substrate is a thin film transistor layer formed so as to face the glass substrate with the polarizer interposed therebetween. A color filter layer may be further provided.

  FIG. 5 is a cross-sectional view showing the configuration of the optical member according to Embodiment 2 of the present invention. Note that aspects not specifically mentioned in the present embodiment can adopt the same aspects as those described in the first embodiment. In the optical member 501 shown in FIG. 5, the polarizer 12 is formed on the glass substrate 11, and the thin film transistor layer 13 is formed so as to face the glass substrate 11 with the polarizer 12 interposed therebetween. In the optical member 502, the polarizer 22 is formed on the glass substrate 21, and the color filter layer 23 is formed so as to face the glass substrate 21 with the polarizer 22 interposed therebetween. In the optical members 501 and 502 shown in FIG. 5, overcoats 14 and 24 are formed on the thin film transistor layer 13 and the color filter layer 23, respectively.

  The optical member 501 and the optical member 502 can be used in combination as an optical member for a liquid crystal display device, for example. In this case, the optical member 501 and the optical member 502 are arranged so that the thin film transistor layer 13 of the optical member 501 and the color filter layer 23 of the optical member 502 are opposed to each other. A liquid crystal display device can be formed by providing a liquid crystal layer, an alignment film, an electrode, and the like in a conventionally known manner. Also in this case, the polarizer 12 of the optical member 501 and the polarizer 22 of the optical member 502 are usually arranged so that their absorption axes are orthogonal to each other.

<Embodiment 3>
An optical member of the present invention comprising a glass substrate as shown in FIG. 1 and a polarizer formed on the glass substrate is a thin film transistor layer formed so as to face the glass substrate with the polarizer interposed therebetween. A color filter layer may be provided, and a retardation layer formed between the polarizer and the color filter layer or the thin film transistor layer may be further provided.

  FIG. 6 is a cross-sectional view showing a configuration of an optical member according to Embodiment 3 of the present invention. Note that aspects not specifically mentioned in the present embodiment can adopt the same aspects as those described in the first and second embodiments. Optical members 601 and 602 shown in FIG. 6 are provided between the polarizer 12 and the thin film transistor layer 13 of the optical member 501 shown in FIG. 5 and between the polarizer 22 and the color filter layer 23 of the optical member 502 shown in FIG. Are further provided with retardation layers 15 and 25, respectively. When the optical member of the present invention includes a retardation layer, desired optical characteristics are imparted satisfactorily. The retardation layer includes a λ / 2 plate that changes the direction of linearly polarized light, a λ / 4 plate that forms circularly polarized light, and a negative O plate, a positive O plate, a negative C plate, and a positive C plate for widening the viewing angle. , Negative A plates, biaxial positive A plates, etc. can be preferably used.

  The optical member 601 and the optical member 602 can be used in combination as an optical member for a liquid crystal display device, for example. In this case, the optical member 601 and the optical member 602 are disposed so that the thin film transistor layer 13 of the optical member 601 and the color filter layer 23 of the optical member 602 face each other, and the optical member 601 and the optical member 602 are arranged. A liquid crystal display device can be formed by providing a liquid crystal layer, an alignment film, an electrode, and the like in a conventionally known manner. Also in this case, the polarizer 12 of the optical member 601 and the polarizer 22 of the optical member 602 are usually arranged so that their absorption axes are orthogonal to each other.

Like this Embodiment, the structure arrange | positioned so that a polarizer, a phase difference layer, a thin-film transistor layer, or a color filter layer may become this order is the structure which bonded the normal optical film out of the cell, and In comparison, the distance between the liquid crystal layer and the polarizer or the retardation layer is reduced, which is advantageous because the deviation of light rays due to the thickness of the glass substrate is reduced and the viewing angle characteristics can be improved.

<Embodiment 4>
An optical member of the present invention comprising a glass substrate as shown in FIG. 1 and a polarizer formed on the glass substrate is a thin film transistor layer formed so as to face the glass substrate with the polarizer interposed therebetween. A color filter layer may be provided, and a retardation layer formed so as to face the polarizer with the color filter layer or the thin film transistor layer interposed therebetween may be provided.

  FIG. 7 is a cross-sectional view showing the configuration of the optical member according to Embodiment 4 of the present invention. In addition, about the matter which is not specially mentioned in this Embodiment, the aspect similar to the aspect described in Embodiment 1-3 can be employ | adopted. Optical members 701 and 702 shown in FIG. 7 further include retardation layers 15 and 25 on the overcoats 14 and 24 of the optical members 501 and 502 shown in FIG.

  The optical member 701 and the optical member 702 can be used in combination as an optical member for a liquid crystal display device, for example. In this case, the optical member 701 and the optical member 702 are arranged so that the thin film transistor layer 13 of the optical member 701 and the color filter layer 23 of the optical member 702 are opposed to each other with the retardation layers 15 and 25 therebetween. A liquid crystal display device can be formed by providing a liquid crystal layer, an alignment film, an electrode, and the like in a conventionally known manner between the optical member 701 and the optical member 702. Also in this case, the polarizer 12 of the optical member 701 and the polarizer 22 of the optical member 702 are usually arranged so that the absorption axes thereof are orthogonal to each other.

  As in this embodiment, the configuration in which the polarizer, the thin film transistor layer or the color filter layer, and the retardation layer are arranged in this order is a state in which the retardation layer and the polarizer are separated. For this reason, not only the deterioration of display performance such as white spots caused by the difference in the linear expansion coefficient between the polarizer and the retardation layer is suppressed, but also the distance between the liquid crystal layer and the retardation layer is reduced, resulting in the thickness of the glass substrate. This is advantageous because the deviation of the light beam is reduced and the viewing angle characteristics can be remarkably improved.

<Embodiment 5>
FIG. 8 is a cross-sectional view showing the configuration of the optical member according to Embodiment 5 of the present invention. In addition, about the matter which is not specially mentioned in this Embodiment, the aspect similar to the aspect described in Embodiment 1-4 can be employ | adopted. In the optical member 801 shown in FIG. 8, the polarizer 12 is formed on the thin film transistor layer 13. In the optical member 802, the polarizer 22 is formed on the color filter layer 23. 8 shows a case where overcoats 14 and 24 are formed between the thin film transistor layer 13 and the polarizer 12 and between the color filter layer 23 and the polarizer 22, respectively. FIG. 8 shows a case where the thin film transistor layer 13 and the color filter layer 23 are formed on the glass substrate 11 and the glass substrate 21, respectively. Embodiment 5 shown in FIG. 8 is based on the optical member provided with the thin film transistor layer and the polarizer shown in FIG. 2 and the optical member provided with the color filter layer and the polarizer shown in FIG. is there.

  The optical member 801 and the optical member 802 can be used in combination as an optical member for a liquid crystal display device, for example. In this case, the optical member 801 and the optical member 802 are arranged so that the thin film transistor layer 13 of the optical member 801 and the color filter layer 23 of the optical member 802 are opposed to each other with the polarizers 12 and 22 interposed therebetween. A liquid crystal display device can be formed by providing a liquid crystal layer, an alignment film, an electrode, and the like in a conventionally known manner between the member 801 and the optical member 802. Also in this case, the polarizer 12 of the optical member 801 and the polarizer 22 of the optical member 802 are usually arranged so that their absorption axes are orthogonal to each other.

  In this embodiment, the polarizer is formed not on the glass substrate but on the thin film transistor layer or the color filter layer. After the thin film transistor layer or the color filter layer is formed in advance, the polarization is finally formed. Since the polarizer is formed, the polarizer itself is not deteriorated by the heat applied when forming the thin film transistor layer or the color filter layer, and almost ideal polarization performance can be realized and high contrast can be realized. Therefore, it is advantageous.

<Embodiment 6>
The optical member of the present invention has a configuration in which a polarizer is formed on a thin film transistor layer or a color filter layer as shown in FIGS. 2 and 3 and in Embodiment 5 (ie, FIG. 8). In this case, the optical member may further include a retardation layer formed so as to face the thin film transistor layer or the color filter layer with the polarizer interposed therebetween.

  FIG. 9 is a cross-sectional view showing a configuration of an optical member according to Embodiment 6 of the present invention. In addition, about the matter which is not specially mentioned in this Embodiment, the aspect similar to the aspect described in Embodiment 1-5 may be employ | adopted. In the optical member 901 shown in FIG. 9, the retardation layer 15 is formed at a position facing the thin film transistor layer 13 with the polarizer 12 interposed therebetween. In the optical member 902, the color filter layer 23 and the polarizer 22 are sandwiched. A phase difference layer 25 is formed at the facing position.

  The optical member 901 and the optical member 902 can be used in combination as an optical member for a liquid crystal display device, for example. In this case, the optical member 901 and the optical member 902 are arranged so that the thin film transistor layer 13 of the optical member 901 and the color filter layer 23 of the optical member 902 are opposed to each other with the retardation layers 15 and 25 therebetween. A liquid crystal display device can be formed by providing a liquid crystal layer, an alignment film, an electrode, and the like in a conventionally known manner between the optical member 901 and the optical member 902. Also in this case, the polarizer 12 of the optical member 901 and the polarizer 22 of the optical member 902 are usually arranged so that their absorption axes are orthogonal to each other.

  As in the present embodiment, the configuration in which the polarizer is formed on the thin film transistor layer and the retardation layer is formed thereon is arranged at the position closest to the liquid crystal layer. This is advantageous from the viewpoint of viewing angle characteristics.

  In addition, as in the present embodiment, a configuration in which a polarizer is formed on a color filter layer and a retardation layer is formed thereon is also disposed at a position closest to the liquid crystal layer. From the viewpoint of viewing angle characteristics, it is advantageous.

  In the above first to sixth embodiments, the case where the polarizer is formed directly on the glass substrate, the thin film transistor layer, or the color filter layer or through the overcoat is described. However, the glass substrate, the thin film transistor layer, or the color is formed. When an alignment layer as described above is interposed between the filter layer and the polarizer, it is advantageous in that a polarizer with a high degree of polarization can be formed. In addition, a layer such as an insulating layer, various barrier layers, and a heat-resistant layer may be formed between the glass substrate, the thin film transistor layer or the color filter layer, and the polarizer instead of the alignment layer or together with the alignment layer. .

  The optical member of the present invention can further include a light-condensing sheet, a diffusion film, a light guide plate, a light reflecting sheet, a brightness enhancement film, an antiglare sheet, and the like by combining these optical layers according to the purpose. The optical member of the invention can have optical characteristics according to the purpose. For example, the structure etc. which laminated | stacked the light-diffusion sheet and the brightness enhancement film in this order on the opposite side to the side which contact | connects the liquid-crystal layer of the optical member of this invention can be illustrated.

<Liquid crystal display device>
The present invention also provides a liquid crystal display device comprising a liquid crystal cell in which liquid crystal is sealed between a pair of cell substrates, wherein at least one of the cell substrates is made of the optical member described above. That is, in manufacturing a liquid crystal display device, the optical member of the present invention as described above can be configured as one cell substrate, and the other cell substrate can be configured as another, or a pair of cell substrates can be configured according to the present invention. The optical member can also be used. As described with reference to FIGS. 4 to 9, in other words, the optical member having the thin film transistor layer and the optical member having the color filter layer are arranged so that the thin film transistor layer and the color filter layer face each other. It is customary to combine a pair of substrates so that the glass substrate is on the outside. In this case, generally, the optical member having the thin film transistor layer is on the back side (that is, the rear side), and the optical member having the color filter layer is It is the front (ie front) side. The liquid crystal layer constituting the liquid crystal display device includes various types known in the field of liquid crystal display devices such as TN (Twisted Nematic), STN (Super Twisted Nematic), VA (Vertical Alignment), and IPS (In-Plane Switching). Can be of mode.

  FIG. 10 is a cross-sectional view illustrating a configuration example of the liquid crystal display device of the present invention. The liquid crystal display device 1000 includes optical members 1 and 2 and a liquid crystal layer 7 sandwiched between the optical members. The optical member 1 can have a structure such as the optical members 401, 501, 601, 701, 801, and 901 shown in FIGS. 4 to 9, for example, and the optical member 2 can be the optical member shown in FIGS. The structure may be 402, 502, 602, 702, 802, 902.

  4 to 9, only in the first embodiment shown in FIG. 4, the polarizers 12 and 22 are disposed outside the liquid crystal cell, and the remaining FIGS. In the form shown in FIG. 2, the glass substrates 11 and 21 constitute the cell substrate on the outside, and the polarizers 12 and 22 are arranged on the inside. 4 to 9 show a mode in which the optical members having the same configuration are combined in the upper and lower directions except that the thin film transistor layer is present or the color filter layer is present. Will be understood from the above description.

  The liquid crystal cell in the liquid crystal display device of the present invention typically has a pair of substrates, at least one of which is composed of the optical member of the present invention, and a pair of electrodes provided facing each other in a region sandwiched between the substrates. And a liquid crystal layer filled between the electrodes. Note that an alignment film is preferably further provided between the pair of electrodes and the liquid crystal layer. In the liquid crystal display device 1000 shown in FIG. 10, a pair of glass substrates respectively formed as a part of the optical members 1 and 2 also serves as a substrate of the liquid crystal cell, and the pair of electrodes 3 and 4, A liquid crystal cell can be formed by sandwiching the alignment films 5 and 6 formed inside and the liquid crystal layer 7 formed inside the alignment films 5 and 6 between the pair of glass substrates. .

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The optical member of the present invention can be suitably applied to liquid crystal display devices for various uses such as for car navigation systems, mobile phones, various monitors including personal computers, and televisions.

It is sectional drawing which shows the basic composition of the optical member of this invention provided with a glass substrate and a polarizer. It is sectional drawing which shows the basic composition of the optical member of this invention provided with a thin-film transistor layer or a color filter layer, and a polarizer. It is sectional drawing which shows the basic composition of the optical member of this invention provided with a thin-film transistor layer or a color filter layer, and a polarizer. It is sectional drawing which shows the structure of the optical member which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the structure of the optical member which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the structure of the optical member which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the structure of the optical member which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the structure of the optical member which concerns on Embodiment 5 of this invention. It is sectional drawing which shows the structure of the optical member which concerns on Embodiment 6 of this invention. It is sectional drawing which shows the structural example of the liquid crystal display device of this invention.

Explanation of symbols

  1, 2, 101, 201, 301, 401, 402, 501, 502, 601, 602, 701, 702, 801, 802, 901, 902 Optical member, 3, 4 electrodes, 5, 6 alignment film, 7 liquid crystal layer 11, 21 glass substrate, 12, 22 polarizer, 13 thin film transistor layer, 14, 24 overcoat, 23 color filter layer, 15, 25 retardation layer, 1000 liquid crystal display device.

Claims (12)

A glass substrate and a polarizer formed on the glass substrate;
The polarizer includes a complex composed of a molecular tube and a conjugated polymer having absorption in a visible light region enclosed by the molecular tube, and
The optical member, wherein the composite is formed on the glass substrate in a substantially oriented state.   The optical member according to claim 1, further comprising a thin film transistor layer or a color filter layer formed to face the polarizer with the glass substrate interposed therebetween.   The optical member according to claim 1, further comprising a thin film transistor layer or a color filter layer formed to face the glass substrate with the polarizer interposed therebetween.   The optical member according to claim 3, further comprising a retardation layer formed between the polarizer and the thin film transistor layer or the color filter layer.   The optical member according to claim 3, further comprising a retardation layer formed so as to face the polarizer with the thin film transistor layer or the color filter layer interposed therebetween. A thin film transistor layer or a color filter layer, and a polarizer formed on the thin film transistor layer or the color filter layer,
The polarizer includes a complex composed of a molecular tube and a conjugated polymer having absorption in a visible light region enclosed by the molecular tube, and
The optical member, wherein the composite is formed on the thin film transistor layer or the color filter layer in a state of being substantially oriented in one direction.   The optical member according to claim 6, further comprising a retardation layer formed so as to face the thin film transistor layer or the color filter layer with the polarizer interposed therebetween.   The optical member according to claim 1 or 6, wherein a light absorption peak wavelength of the composite is in a range of 380 to 780 nm.   The optical member according to claim 1, wherein the conjugated polymer is made of polyaniline.   The optical member according to claim 1, wherein the molecular tube is made of an intermolecular cross-linked product of a cyclic compound.   The optical member according to claim 10, wherein the cyclic compound is made of cyclodextrin.   A liquid crystal display device comprising a liquid crystal cell formed by sealing a liquid crystal between a pair of cell substrates, wherein at least one of the cell substrates is made of the optical member according to claim 1.

Images