WO2007142037A1 - Lame de polarisation elliptique, procédé de fabrication de lame de polarisation elliptique, affichage à cristaux liquides et affichage électroluminescent - Google Patents

Lame de polarisation elliptique, procédé de fabrication de lame de polarisation elliptique, affichage à cristaux liquides et affichage électroluminescent Download PDF

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Publication number
WO2007142037A1
WO2007142037A1 PCT/JP2007/060562 JP2007060562W WO2007142037A1 WO 2007142037 A1 WO2007142037 A1 WO 2007142037A1 JP 2007060562 W JP2007060562 W JP 2007060562W WO 2007142037 A1 WO2007142037 A1 WO 2007142037A1
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WIPO (PCT)
Prior art keywords
polarizing plate
liquid crystal
film
layer
elliptically polarizing
Prior art date
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PCT/JP2007/060562
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English (en)
Japanese (ja)
Inventor
Tetsuya Uesaka
Kenji Hosaki
Original Assignee
Nippon Oil Corporation
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Filing date
Publication date
Priority claimed from JP2006149819A external-priority patent/JP2007322498A/ja
Priority claimed from JP2006153247A external-priority patent/JP2007322778A/ja
Application filed by Nippon Oil Corporation filed Critical Nippon Oil Corporation
Priority to KR1020087032072A priority Critical patent/KR101397301B1/ko
Priority to CN200780019909.XA priority patent/CN101454699B/zh
Publication of WO2007142037A1 publication Critical patent/WO2007142037A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/52—Encapsulations
    • H01L33/56—Materials, e.g. epoxy or silicone resin
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/10—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates with refractive index ellipsoid inclined, or tilted, relative to the LC-layer surface O plate

Definitions

  • the present invention relates to an elliptically polarizing plate comprising an optically anisotropic element having a liquid crystal layer in which a twisted nematic alignment structure or a hybrid nematic alignment structure is fixed, and a method for producing the same. Furthermore, the present invention relates to a liquid crystal display device and an electroluminescence display device using the elliptically polarizing plate.
  • liquid crystal display devices There are three types of liquid crystal display devices: a transmissive type capable of displaying images in transmissive mode, a reflective type capable of displaying images in reflective mode, and a transflective type capable of displaying images in both transmissive mode and reflective mode. Due to its thin and light features, it is widely used as a display device for notebook computers and televisions. In particular, transflective liquid crystal display devices employ a display system that combines reflective and transmissive displays. By switching to either display system according to the ambient brightness, the power consumption is reduced. It can be clearly displayed in places and in dark places, so it is widely used in various portable electronic devices.
  • the liquid crystal display device has the advantages of being thin, light and low power consumption.
  • the STN type liquid crystal display device has not achieved full black and white display.
  • the TN type liquid crystal display device particularly in the transmission mode, Due to the refractive index anisotropy, viewing angle problems such as a decrease in display contrast, a change in display color, or a gradation inversion when viewed from an oblique direction cannot be avoided, and improvements are desired.
  • liquid crystal display devices with excellent display performance have not been fully realized.
  • Several means for improving the display performance of the STN type liquid crystal display device have been proposed. One of them is a method of arranging a retardation film between the polarizing plate and the liquid crystal cell of the liquid crystal display device.
  • This method can be realized simply by laminating a retardation film on a polarizing plate to make an elliptical polarizing plate, without significantly changing the manufacturing process of the liquid crystal display device. It has the advantage that it can be applied. However, the thickness increases by the amount of the adhesive film and the adhesive film for bonding the retardation film to each other. There is a problem that the productivity decreases and the liquid crystal panel of the final product increases in thickness.
  • an elliptically polarizing plate is manufactured by continuously laminating a polarizing plate and a retardation film from a long film form, it is limited to a special case where the absorption axis of the polarizing plate and the orientation axis of the retardation film are parallel. It was. In order to make the shaft arrangement other than parallel, it is necessary to cut out from a long film into a sheet and paste it together, and there is a problem that the process is complicated and the productivity is poor. Further, in the stretched and oriented retardation film, it is difficult to freely control the orientation of the polymer, and the degree of freedom in optical properties is limited. As described above, it was not possible to sufficiently meet the demand for an elliptically polarizing plate having various axes of the absorption axis of the polarizing plate and the orientation axis of the retardation film and having excellent optical performance.
  • a retardation film using a liquid crystal compound has fewer restrictions on the alignment axis, and for example, an optical anisotropic element in which a liquid crystal polymer is aligned and fixed has been proposed (Patent Documents 1 and 5). 2). Furthermore, a quarter-wave plate made of a liquid crystal film in which a twisted nematic alignment structure is fixed has been proposed (Patent Documents 3 and 4).
  • an optical compensation film has been proposed to be placed between the liquid crystal cell and the upper and lower polarizing plates and put into practical use.
  • the structure etc. are mentioned (patent documents 5 to 7).
  • Patent Document 8 In order to increase the viewing angle of the transmission mode of this transflective liquid crystal display device, a method using an optical compensation film in which a nematic hybrid alignment is applied to a circularly polarizing plate disposed between a liquid crystal cell and a backlight is proposed.
  • Patent Document 1 Japanese Patent Laid-Open No. 4-5700
  • Patent Document 2 Japanese Patent Laid-Open No. 6-2 4 2 3 1 7
  • Patent Document 3 Japanese Patent Laid-Open No. 2002-4891 7
  • Patent Document 4 Japanese Patent Laid-Open No. 2004-309904
  • Patent Document 5 Japanese Patent No. 2640083
  • Patent Document 6 Japanese Patent Laid-Open No. 11-194325
  • Patent Document 7 Japanese Patent Application Laid-Open No. 11-1-194371
  • Patent Document 8 Japanese Unexamined Patent Publication No. 2002-3171-7
  • Patent Document 9 Japanese Patent Application Laid-Open No. 8-278491
  • the object of the present invention is to simplify the layer structure of the elliptically polarizing plate, thereby suppressing the thickness and preventing inconveniences such as peeling even under high temperature and high humidity conditions.
  • An elliptical polarizing plate that can be bonded continuously from a long film form by setting the orientation axis angle of the polarizing plate arbitrarily with respect to the absorption axis of the polarizing plate, a manufacturing method thereof, a liquid crystal display device using the same, and an electronic display
  • the object is to provide a top luminescence display device.
  • the present invention provides an elliptically polarizing plate in which a translucent protective film, a polarizing element, and an optical anisotropic element are laminated in this order, and the optical anisotropic element exhibits at least positive uniaxiality.
  • the present invention relates to an elliptically polarizing plate characterized by including a liquid crystal layer in which the alignment is fixed after twisted nematic alignment or hybrid nematic alignment in a liquid crystal state.
  • the present invention also provides: (1) A translucent protective film is bonded to a polarizing element via an adhesive layer 1 to obtain a laminate (A) comprising the translucent protective film / adhesive layer 1 / polarizing element.
  • a layer made of a liquid crystal composition exhibiting at least positive uniaxiality is formed on a rubbing-treated alignment substrate, and the layer is subjected to twisted nematic alignment or hybrid nematic alignment. Thereafter, an optical anisotropic element in which the orientation is fixed is formed to obtain a laminate (B) composed of an alignment substrate / optical anisotropic element. (3) The optical anisotropy of the laminate (B) is obtained. After adhering the element side to the polarizing element side of the laminate (A) via the adhesive layer 2, the alignment substrate is peeled off to attach the optical anisotropic element to the laminate.
  • the manufacturing method of the elliptically-polarizing plate also provides: (1) A translucent protective film is bonded to a polarizing element via an adhesive layer 1 to obtain a laminate (A) comprising the translucent protective film adhesive layer 1 a Z polarizing element.
  • a rubbing treatment is applied to the polarizing element surface of the laminate (A) to form a layer made of a liquid crystalline composition exhibiting at least positive uniaxiality, and the layer is subjected to twisted nematic alignment or After the hybrid nematic alignment, an optical anisotropic element with the alignment fixed is formed to obtain an elliptically polarizing plate made of a translucent protective film / adhesive layer 1 / polarizing element Z optical anisotropic element.
  • the manufacturing method of the elliptically polarizing plate characterized by passing through each process of these.
  • the present invention also relates to a liquid crystal display device in which the elliptically polarizing plate described above is disposed on at least one surface of a liquid crystal cell.
  • the present invention also relates to an electroluminescence display device comprising the elliptically polarizing plate described above.
  • the elliptically polarizing plate of the present invention is less susceptible to damage to the optical anisotropic element layer in the step of bonding the optical anisotropic element and the polarizing element, and is excellent in adhesiveness of the optical anisotropic element. Furthermore, since the number of laminated layers constituting the elliptically polarizing plate is small, there is no peeling or foaming at the interface in the durability test. Also in the bonding process with the polarizing element, since it can be bonded in the form of a long film, there is an advantage that the bonding process can be streamlined compared to the conventional method.
  • an elliptically polarizing plate is produced by adhering an optically anisotropic element to a polarizing element directly or via an adhesive.
  • the conventional polarizer The number of layers can be reduced as compared with an elliptically polarizing plate in which an optical anisotropic element is bonded to a polarizing plate whose both sides are protected with an optical film such as a triacetyl cellulose film.
  • the total thickness of the elliptically polarizing plate can be reduced, and the influence of shrinkage strain due to the difference in the expansion and contraction behavior of each layer due to heat or humidity is reduced, eliminating defects such as peeling at the bonded interface. Is possible.
  • the layer structure of the elliptically polarizing plate obtained in the present invention is composed of any of the following structures (I) or (II), and a member such as a translucent overcoat layer 'is further added as necessary.
  • an optically anisotropic element comprising a liquid crystal layer in which the liquid crystal composition exhibiting positive uniaxiality in the present invention is twisted nematic alignment or hybrid nematic alignment in the liquid crystal state and the alignment is fixed is used. There is no particular limitation except for this point. In terms of obtaining a thin elliptical polarizing plate, either (I) or (II) may be used.
  • liquid crystal composition used in the present invention will be described.
  • the optically anisotropic element used for the elliptically polarizing plate of the present invention comprises at least a liquid crystal composition exhibiting optically positive uniaxiality after twisted nematic alignment or hybrid nematic alignment in a liquid crystal state.
  • T g glass transition temperature
  • Such a liquid crystalline composition is composed of a liquid crystalline polymer composition mainly composed of a liquid crystalline polymer exhibiting optically positive uniaxiality, and the liquid crystalline polymer includes a thermoto mouth that exhibits liquid crystal properties when melted.
  • a pick liquid crystal polymer is used.
  • the thermotropic liquid crystal polymer used is required to maintain the molecular alignment state of the liquid crystal phase even when cooled from the molten state (liquid crystal state) to T g or less.
  • the liquid crystal phase at the time of melting of the liquid crystalline polymer may be any molecular alignment structure such as smectic, nematic, twisted nematic, cholesteric, and the like.
  • liquid crystalline polymer various main chain type liquid crystalline polymers, side chain type liquid crystalline polymers, or a mixture thereof can be used.
  • Main chain type liquid crystalline polymers include polyester, polyamide, polycarbonate, polyimide, polyuretan, polybenzimidazole, polybenzoxazonole, polybenzthiazole, polyazomethine.
  • semi-aromatic polyester liquid crystalline polymers in which mesogenic groups that give liquid crystallinity and bent chains such as polymethylene, polyethylene oxide, and polysiloxane are alternately bonded, and wholly aromatic polyesters without bent chains.
  • Liquid crystalline polymers are desirable in the present invention.
  • Side chain type liquid crystalline polymers include polyacrylates, polymethacrylates, polyvinylinoles, polysiloxanes, polyethers, polymalonates, and other substances having a linear or cyclic skeleton. Examples thereof include a liquid crystalline polymer having a mesogen group bonded as a chain, or a mixture thereof.
  • a side chain type liquid crystalline polymer in which a mesogenic group providing liquid crystal properties is bonded to a skeleton chain through a spacer composed of a bent chain, or a molecular structure having a mesogen in both the main chain and the side chain.
  • Liquid crystalline polymers are desirable in the present invention.
  • liquid crystalline composition forming twisted nematic alignment has the ability to add a chiral agent to the composition in order to induce twisted nematic alignment.
  • Examples of chiral structural units include optically active 2-methyl-1,1,4-butanediole, 2,4-pentanediole, 1,2-prononediole, 2-chloro-1,1-butanediol, 2-Fu / Leoro 1,4-Butanediol, 2-Bromo 1,4-Butanediol, 2-Ethanole 1,4 Butanediol, 2-Propyl 1,4-Butanediol, 3-Methylhexane Structural units derived from diol, 3-methyladipic acid, naproxen derivatives, camphoric acid, binaphthol, menthol, etc., or cholesteryl group-containing structural units or derivatives thereof (eg derivatives such as diacetoxy compounds) units derived from force To use You can.
  • the structural unit may be either R or S, or a mixture of R and S.
  • liquid crystal polymer Even in the case of oligomers and low-molecular liquid crystals, thermal crosslinking, photocrosslinking, etc. in the state of being fixed in alignment by cooling to below the liquid crystal transition temperature or liquid crystal transition temperature by introducing a crosslinkable group or by blending an appropriate crosslinking agent. Those that can be polymerized by this means are also included in the liquid crystalline polymer. Even discotic liquid crystal compounds can be used without problems.
  • the liquid crystalline polymer those showing optically positive or negative uniaxiality are usually used. Their optical characteristics are appropriately selected depending on the function required for the optical anisotropic element, but in the case of a twisted nematic aligned polymer liquid crystal layer, a liquid crystal polymer exhibiting positive uniaxiality is preferably used. Used.
  • Low-molecular liquid crystals include Schiff bases, biphenyls, terphenyls, esters, thioesters, stilbenes, tolans, azoxys, azos, phenoxy / resic hexanes, pyrimidines.
  • a low molecular liquid crystal compound having a skeleton, a cyclohexenorecyclohexane, a trimesic acid, a triphenylene, a torquesen, a phthalocyanine, a porphyrin molecular skeleton, or a mixture of these compounds.
  • liquid crystalline composition comprising the various liquid crystal compounds described above contains a polymerizable group such as a bur group, a (meth) acryloyl group, an epoxy group, or an oxetael group, it is suitable for each polymerizable group, It is preferable to add various reaction initiators that do not impair the object of the present invention, for example, various radical initiators or cation generators.
  • a polymerizable group such as a bur group, a (meth) acryloyl group, an epoxy group, or an oxetael group
  • T g of the liquid crystal composition is preferably room temperature or higher, and more preferably 50 ° C. or higher, because it affects alignment stability after alignment fixation.
  • Tg can be adjusted by using a liquid crystalline polymer, a low molecular liquid crystal, a chiral agent, various compounds, etc., if necessary, used in the liquid crystalline composition, but may be a crosslinking means as described above.
  • the various compounds added as necessary may be any compound that does not inhibit the orientation of the liquid crystalline composition used in the present invention and does not depart from the purpose of the present invention.
  • Leveling agents, surfactants, and stabilizers for uniforming the formation of can be mentioned. Next, the alignment substrate will be described.
  • the alignment substrate examples include thermosetting resins such as polyimide, epoxy resin and phenol resin, polyamide; polyetherimide; polyetherketone; polyetheretherketone (PEEK); polyketone; polyethersulfone; Polyphenylene oxide; Polyester, polyethylene naphthalate, polybutylene terephthalate and other boresters; Polyacetal; Polycarbonate; Poly (meth) acrylate; Thermoplastic resins such as polyvinyl alcohol
  • the exemplified polymer film can be used. Further, in order to control the orientation of the liquid crystalline composition on the surface of the polymer film, an organic thin film made of a resin such as polybutyl alcohol or a polyimide derivative may be formed.
  • the polymer film is subjected to an orientation treatment such as a rubbing treatment and is provided to the orientation substrate.
  • a rubbing treatment is usually performed to align the liquid crystalline composition on the alignment substrate.
  • the rubbing process can be performed at a predetermined arbitrary angle with respect to the MD direction of the long alignment substrate.
  • the angle of the rubbing direction with respect to the MD direction is appropriately set according to the function of the optical anisotropic element.
  • the rubbing direction is normally rubbed obliquely with respect to the MD direction. It is preferable.
  • the angle in the oblique direction is preferably in the range of 1 45 degrees to +45 degrees.
  • the rubbing treatment can be performed by an arbitrary method.
  • a rubbing roll is disposed at an arbitrary angle with respect to the MD direction of the long film on a stage that conveys the long film in the MD direction.
  • the film surface is rubbed by rotating the rubbing roll while transporting in the MD direction.
  • the angle between the moving direction of the rubinda roll and the stage is a mechanism that can be freely adjusted, and an appropriate rubbing cloth material is stuck on the surface of the rubbing roll.
  • Examples of a method for forming the liquid crystalline composition layer by spreading the liquid crystalline composition on the rubbing-treated surface of the alignment substrate include, for example, a method in which the liquid crystalline composition is dissolved in an appropriate solvent, applied and dried, or Examples thereof include a method in which a liquid crystal composition is directly melt-extruded by a T die or the like. From the standpoint of film thickness uniformity, a solution coating and drying method is appropriate.
  • the application method of the liquid crystal composition solution is not particularly limited. For example, a die coating method, a slot die coating method, a slide die coating method, a roll coating method, A bar coat method, a dipping pulling method, or the like can be employed.
  • the solvent is removed by an appropriate drying method, and then heated at a predetermined temperature for a predetermined time to cause the liquid crystalline composition to be twisted nematic alignment or hybrid nematic alignment, and then cooled to T g or less, or
  • a method suitable for the liquid crystal composition used for example, a reaction (curing) by light irradiation and Z or heat treatment, and fixing the alignment, thereby fixing a liquid crystal composition layer having an alignment structure fixed.
  • the alignment structure is fixed means that the alignment structure is not disturbed under the conditions of use.
  • a similar alignment state can be produced in a liquid crystal cell. However, by fixing the alignment structure, a substrate such as glass in the liquid crystal cell becomes unnecessary, and weight reduction, thinning, improved handling, and the like can be achieved.
  • Light irradiation methods include light from light sources such as metal halide lamps, high-pressure mercury lamps, low-pressure mercury lamps, xenon lamps, lamp clamps, and lasers that have a spectrum in the absorption wavelength region of the reaction initiator used. Irradiate.
  • the dose per square centimeter is usually in the range of 1 to 200,000 mJ, and preferably 10 to 100 OmJ, as the integrated dose.
  • this is not the case when the absorption region of the reaction initiator and the spectrum of the light source are significantly different, or when various compounds constituting the liquid crystalline composition have the ability to absorb the light source wavelength.
  • an appropriate photosensitizer, or a mixture of two or more reaction initiators having different absorption wavelengths can be used.
  • the temperature at the time of light irradiation is preferably a temperature range in which the liquid crystalline composition becomes a liquid crystal phase. In order to sufficiently enhance the curing effect, light irradiation is performed at a temperature equal to or higher than T g of the liquid crystalline composition. Is preferred.
  • the optical anisotropic element used for the elliptically polarizing plate of the present invention includes a liquid crystal layer in which a liquid crystal alignment structure of twisted nematic alignment or hybrid nematic alignment is fixed.
  • the twist nematic alignment liquid crystal layer means a layer having an optical anisotropic axis and a twist nematic alignment structure having a structure in which the optical anisotropic axis is twisted from one surface to the other surface.
  • an optical anisotropic element composed of a twisted nematic alignment liquid crystal layer has characteristics equivalent to those obtained by stacking optically anisotropic layers in multiple layers so that the optical anisotropic axis is continuously twisted.
  • a temperature compensation type element in which the retardation changes when the temperature environment changes and the retardation returns to the original temperature when the temperature is returned to the original temperature can be preferably used.
  • ⁇ n ⁇ d for light with a wavelength of 550 nm is 50 nm or more and 1 500 nm or less and that the twist angle is 5 degrees or more and 400 degrees or less.
  • the thickness of the twisted nematic alignment liquid crystal layer is not particularly limited as long as the function of the optical anisotropic element is exhibited, and is about 0.05 ⁇ ! ⁇ 50 ⁇ m, preferably about 0.1 I m to 30 ⁇ m is suitable.
  • the ⁇ n ⁇ d and twist angle of the twisted nematic alignment liquid crystal layer also depend on the retardation and twist angle of the liquid crystal cell used.
  • each is preferably 400 nm or more and 1 200 ⁇ m or less and 1 20 degrees or more and 300 degrees or less, more preferably 500 nm or more and 1 000 nm or less and 1 60 degrees or more and 26 0 degrees.
  • the twist direction of the twisted nematic alignment liquid crystal layer is preferably opposite to the twist direction of the liquid crystal cell.
  • a twisted nematic alignment liquid crystal layer ⁇ n ⁇ d force 140 nm or more and 300 nm or less when used as an antireflection film for a liquid crystal display device or an electroluminescence display device, a twisted nematic alignment liquid crystal layer ⁇ n ⁇ d force 140 nm or more and 300 nm or less, and the twist angle is preferably 30 degrees or more and 85 degrees or less, and (1) 1 5 5 nm or more 1 75 nm or less and 40 0 degrees or more 50 degrees or less (2) 1 76 nm or more 2 16 nm or less and 58 degrees or more and 70 degrees or less, (3) 2 30 nm or more 2 70 nm or less and 70 degrees or more and 80 degrees or less Is particularly preferred.
  • twisting directions There are two types of twisting directions, but they can be right-handed or left-handed.
  • the hybrid nematic alignment liquid crystal layer is a layer including at least a hybrid nematic alignment liquid crystal layer in which a hybrid nematic alignment structure having an average tilt angle of 5 ° to 45 ° formed by the liquid crystal composition in a liquid crystal state is fixed.
  • the hybrid nematic alignment referred to in the present invention means that liquid crystal molecules are in a hybrid nematic alignment, and the angle formed by the director of the liquid crystal molecules and the plane of the liquid crystal layer is different between the upper and lower surfaces of the layer. Say. Therefore, since the angle formed by the director and the layer plane is different between the vicinity of the upper surface interface and the vicinity of the lower surface interface, the angle continuously changes between the upper surface and the lower surface of the layer. I am with.
  • the directors of the liquid crystal molecules are oriented at different angles at all positions in the film thickness direction of the layer. Therefore, the layer no longer has an optical axis when viewed as a layer structure.
  • the average tilt angle as used in the present invention means the average value of the angle formed between the director of the liquid crystal molecules and the plane of the hybrid nematic alignment liquid crystal layer in the film thickness direction of the hybrid nematic alignment liquid crystal layer.
  • the angle formed by the director and the layer plane is usually 25 to 90 degrees as an absolute value in the vicinity of one interface of the layer, preferably 35 to 85. Degrees, more preferably 45 to 80 degrees, and on the opposite side of the surface, the absolute value is usually 0 to 20 degrees, preferably 0 to 10 degrees,
  • the average tilt angle is usually 5 to 45 degrees as an absolute value, preferably 15 to 43 degrees, and more preferably 25 to 40 degrees. If the average tilt angle is out of the above range, it is not desirable because it may cause a decrease in contrast when viewed from an oblique direction.
  • the average tilt angle can be obtained by applying the crystal rotation method.
  • the thickness of the liquid crystal layer for the hybrid nematic alignment liquid crystal layer to exhibit a better viewing angle improving effect on the liquid crystal display device depends on the type of the target liquid crystal display element and various optical parameters. Therefore, it cannot be generally stated, but usually 0.1 ⁇ to 10 ⁇ ⁇ , preferably 0.2 ⁇ to 5 ⁇ , particularly preferably 0.4 ⁇ ! It is in the range of ⁇ 4 ⁇ . If the film thickness is less than 0.1 l / zm, sufficient compensation effect may not be obtained. In addition, if the film thickness exceeds 10 ⁇ , the display of the liquid crystal display device is unnecessarily colored. There is a risk that.
  • the in-plane retardation value when viewed from the normal direction of the hybrid nematic alignment liquid crystal layer is the refractive index of the liquid crystal layer in the direction parallel to the director.
  • the apparent retardation value is given by the product ( ⁇ ⁇ ⁇ d) of the apparent birefringence and the absolute film thickness. This value can be easily obtained by polarization optical measurement such as ellipsometry.
  • ⁇ n ⁇ d of the hybrid nematic alignment liquid crystal layer is usually 1 0 ⁇ ⁇ for monochromatic light with a wavelength of 5 5 0 ⁇ ⁇ !
  • ⁇ 4 0 0 n m preferably 3 0 n ⁇ ! ⁇ 20 0 nm, particularly preferably in the range of 50 nm to 1500 nm.
  • ⁇ n ⁇ d is less than 10 nm, a sufficient viewing angle expansion effect may not be obtained.
  • it is larger than 400 nm unnecessary coloration may occur in the liquid crystal display device when viewed obliquely.
  • the upper and lower sides of an optical anisotropic element composed of a hybrid nematic alignment liquid crystal layer are respectively defined by the angle formed between the liquid crystal molecular director in the vicinity of the hybrid nematic interface that constitutes the optical anisotropic element and the plane of the liquid crystal layer.
  • the surface formed by the director of the liquid crystal molecules and the plane of the liquid crystal layer forms an angle of 25 to 90 degrees on the acute angle side is defined as b-plane, and the angle is 0 to 20 degrees on the acute angle side.
  • the c-plane is the angled plane.
  • the angle formed by the liquid crystal molecular director and the projection component on the c-plane of the director is an acute angle and parallel to the projection component.
  • the direction is defined as the tilt direction of the hybrid nematic alignment liquid crystal layer (Figs. 1 and 2).
  • the driving low-molecular liquid crystal is not parallel to the cell interface but tilted at a certain angle, and this angle is generally referred to as a pretilt angle.
  • a pretilt angle What is the projection component on the director interface?
  • the direction formed by the acute angle and parallel to the projected component of the director is defined as the pretilt direction of the liquid crystal cell layer (Fig. 3).
  • a twist nematic alignment liquid crystal layer or a hyper nematic alignment liquid crystal layer or a polarization element Furthermore, there is no particular limitation as long as it has a sufficient adhesive force to the translucent protective film and the like, and does not impair the optical properties of each of the above materials.
  • acrylic resin, methacrylic resin Various reactions such as resin, epoxy resin, ethylene monoacetate copolymer, rubber, urethane, polybutyl ether and mixtures thereof, thermosetting and / or photocuring, electron beam curing Can be mentioned.
  • These adhesive layers also include those having the function of a transparent protective layer (overcoat layer) that protects the liquid crystal layer.
  • a pressure-sensitive adhesive can also be used as the adhesive.
  • the reaction (curing) conditions of the reactive ones change depending on the components constituting the adhesive, the viscosity, the reaction temperature, and the like.
  • various known photoinitiators such as metal halide lamps, high-pressure mercury lamps, low-pressure mercury lamps, xenon lamps, arc lamps, lasers, and synchrotron radiation sources.
  • the reaction may be carried out by irradiating light from.
  • the amount of irradiation per unit area (1 square centimeter) is usually in the range of 1 to 200,000 mj, preferably 10 to 100 m Oj as the integrated dose.
  • the acceleration voltage in the case of the electron beam curing type is usually 10 kV to 200 kV, and preferably 50 kV to 100 kV.
  • the thicknesses of the adhesive layer and the overcoat layer are the same as those described above. However, it is usually from 1 to 30 ⁇ , more preferably from 3 to 10 ⁇ , although it depends on the strength of the adhesive and the operating temperature. Outside this range, the adhesive strength is insufficient, or bleeding from the end is not preferable.
  • these adhesives may be added with various fine particles and surface modifiers for the purpose of controlling the optical properties or controlling the peelability and erosion properties of the substrate as long as the properties are not impaired. it can.
  • the fine particles include fine particles having a refractive index different from that of the compound constituting the adhesive, conductive fine particles for improving antistatic performance without impairing transparency, and fine particles for improving wear resistance.
  • Specific examples include fine silica, fine alumina, Indium Tin Oxide fine particles, silver fine particles, and various synthetic resin fine particles.
  • the surface modifier is not particularly limited as long as it has good compatibility with the adhesive and does not affect the curability of the adhesive or the optical performance after curing, and is ionic or nonionic water-soluble.
  • Surfactants, oil-soluble surfactants, polymer surfactants, fluorosurfactants, organometallic surfactants such as silicone, reactive surfactants, and the like can be used.
  • fluorine-based surfactants such as perfluoroalkyl compounds and perfluoropolyether compounds, or organometallic surfactants such as silicone are particularly desirable because they have a large surface modification effect.
  • the addition amount of the surface modifier is preferably in the range of 0.1 to 10% by mass with respect to the adhesive, more preferably 0.05 to 5% by mass, and further preferably 0.1 to 3% by mass. It is. If the amount is too small, the effect of addition becomes insufficient. On the other hand, if the amount is too large, there is a risk that the adhesive strength is too low.
  • the surface modifier may be used alone, or a plurality of types may be used in combination as necessary.
  • the polarizing element that can be used in the present invention is not particularly limited, and various types can be used.
  • the polarizing element include hydrophilic polymer films such as polyvinyl alcohol film, partially formalized polyvinyl alcohol film, and ethylene / vinyl acetate copolymer partially saponified film.
  • Polyethylene oriented film such as adsorbed dichroic substances such as polyvinyl chloride and dehydrochlorinated polyvinyl chloride Etc. Among these, those obtained by stretching a polybulal alcohol film and adsorbing and orienting a dichroic material (iodine, dye) are preferably used.
  • the thickness of the polarizing element is not particularly limited, but is generally about 5 to 50 m.
  • a polarizing element in which a polyvinyl alcohol film is dyed with iodine and uniaxially stretched is prepared by, for example, dyeing polybulal alcohol in an aqueous solution of iodine and stretching it 3 to 7 times the original length. Can do. If necessary, it can be immersed in an aqueous solution of boric acid or potassium oxalate. Furthermore, if necessary, the polybulal alcohol film may be immersed in water and washed before dyeing. In addition to washing the polyvinyl alcohol film surface with anti-blocking agents by washing the polyvinyl alcohol film with water, swelling of the polyvinyl alcohol film prevents unevenness in dyeing unevenness. There is also an effect.
  • the stretching may be performed after dyeing with iodine, may be performed while dyeing, or may be dyed with iodine after stretching.
  • the film can be stretched in an aqueous solution of boric acid or potassium iodide or in a water bath.
  • an optically isotropic film is preferable.
  • Fujitac Fluji Photo Film Co., Ltd.
  • Koyuka Tac Konica Minoltatop Co., Ltd.
  • triacetyl cellulose (Ding AC) film Ryoichi Ton film (product of JSR), ZENOA film, ZEONEX film (product of ZEON CORPORATION), TPX film (product of Mitsui Chemicals), attaliprene film (Mitsubishi Rayon Co., Ltd.) and the like.
  • Triacetyl cellulose and cycloolefin polymer are preferred from the viewpoint of flatness, heat resistance and moisture resistance in the case of an elliptically polarizing plate.
  • the thickness of the translucent protective film is preferably from 1 to 100 ⁇ , and more preferably from 5 to 50 ⁇ .
  • the translucent protective film a film having a hard coat layer, antireflection treatment, anti-sticking treatment, light diffusion or antiglare treatment on the surface can be used.
  • Hard coat treatment is applied for the purpose of preventing scratches on the surface of the polarizing plate. For example, it protects a cured film excellent in hardness, sliding properties, etc. with an appropriate UV curable resin such as acryl or silicone. Shape by adding to the surface of the film Can be made.
  • the antireflection treatment is performed for the purpose of preventing the reflection of external light on the surface of the polarizing plate, and can be achieved by forming an antireflection film according to the conventional method.
  • the anti-sticking treatment is performed for the purpose of preventing adhesion between adjacent layers.
  • Anti-glare treatment is applied for the purpose of preventing external light from being reflected on the surface of the polarizing plate and obstructing the visibility of light transmitted through the polarizing plate.
  • a roughening method using a sandblasting method or an embossing method can be formed by providing a fine uneven structure on the surface of the protective film by an appropriate method such as a blending method of transparent fine particles.
  • the fine particles to be included in the formation of the surface fine concavo-convex structure include silica, alumina, titanium air, zirconium oxide, tin oxide, indium oxide, cadmium oxide, and antimony oxide having an average particle diameter of 0.5 to 50 ⁇ .
  • Transparent fine particles such as inorganic fine particles, organic fine particles made of a crosslinked or uncrosslinked polymer, etc. may be used.
  • the amount of fine particles used is generally about 2 to 50 parts by weight with respect to 100 parts by weight of the transparent resin forming the surface fine convex structure, and 5 to 25 parts by weight. Part is preferred.
  • the antiglare layer may also serve as a light diffusion layer (viewing angle expanding function or the like) for diffusing the light transmitted through the polarizing plate to expand the viewing angle.
  • the anti-reflection layer, anti-sticking layer, light diffusion layer, anti-glare layer, etc. can be provided on the light-transmitting protective film itself, or separately from the light-transmitting protective film layer as an optical layer. It can also be provided as.
  • the manufacturing method of the elliptically polarizing plate of this invention is demonstrated in detail.
  • the layer structure of the elliptically polarizing plate obtained in the present invention is selected from the following two types as shown in FIGS.
  • a layer made of a liquid crystal composition exhibiting at least positive uniaxiality is formed on an alignment substrate that has been subjected to rubbing treatment, and the alignment is fixed after twisted nematic alignment or hybrid nematic alignment.
  • the alignment substrate After adhering the optically anisotropic element side of the laminate (B) to the polarizing element side of the laminate (A) via the adhesive layer 2, the alignment substrate is peeled off to remove the optically anisotropic element. The element is transferred to the laminate (A), and the translucent protective film adhesive layer 1 / polarizing element Z adhesive layer
  • An adhesive layer 1 is formed on the polarizing element, the light-transmitting protective film and the polarizing element are brought into close contact with each other through the adhesive layer 1, and then the adhesive layer is reacted (cured) as necessary.
  • a laminate (A) bonded on the translucent protective film through the adhesive layer 1 can be obtained.
  • a coating film of a liquid crystalline composition exhibiting at least positive uniaxiality is formed by an appropriate method, and the solvent is removed as necessary.
  • the twisted nematic alignment or the hybrid nematic alignment of the liquid crystal composition is completed, and the alignment of the liquid crystal composition is fixed by means suitable for the liquid crystal composition used.
  • a laminate (B) having a liquid crystal layer in which twisted nematic alignment or hybrid nematic alignment is fixed on the alignment substrate can be obtained.
  • the manufacturing method in the third step will be described.
  • the elliptically polarizing plate of the present invention comprising a translucent protective film / adhesive layer 1 / polarizing element / adhesive layer 2 / optically anisotropic element can be obtained.
  • the liquid crystal layer may be transferred to another substrate different from the alignment substrate, if necessary. It may be retransferred to the body (A).
  • a translucent overcoat layer may be provided, or a temporary surface protective film may be bonded.
  • the translucent overcoat can be selected from the above-mentioned adhesives.
  • a rubbing treatment is performed on the polarizing element of the laminate (A) to form a layer composed of a liquid crystalline composition exhibiting at least positive uniaxiality, and the layer is subjected to twisted nematic alignment or hybrid.
  • an optical anisotropic element having the orientation fixed is formed, and a second step of obtaining an elliptically polarizing plate composed of a translucent protective film Z adhesive layer 1 Z polarizing element / optical anisotropic element ,
  • the manufacturing method of the laminate (A), which is the first step, is the same as in the configuration (I).
  • the manufacturing method in the second step will be described.
  • the polarizing element of the laminate (A) produced in the first step is subjected to rubbing treatment to form a coating film of a liquid crystalline composition exhibiting at least positive uniaxiality by an appropriate method, and if necessary, a solvent, etc. Then, the twisted nematic alignment or the hybrid nematic alignment of the liquid crystalline composition is completed by heating or the like, and the alignment of the liquid crystalline composition is fixed by means suitable for the liquid crystal physical composition used.
  • a light-transmitting protective film having an optically anisotropic element comprising a liquid crystal layer in which twisted nematic or hybrid nematic liquid crystal alignment is fixed on the laminate (A) 1 Z-polarizing element From an optically anisotropic element An elliptically polarizing plate can be obtained.
  • a translucent overcoat layer may be provided, or a temporary surface protective film may be bonded.
  • the translucent overcoat can be selected from the above-mentioned adhesives.
  • a rubbing may be performed after providing an appropriate alignment film that nematically aligns the liquid crystalline composition.
  • the method of forming a layer of a liquid crystalline composition by applying the method is also included in the present invention (FIG. 6).
  • the translucent protective film and the polarizing element used for the production of the laminate (i) are preferably subjected to surface treatment.
  • a method suitable for a translucent protective film or a polarizing element may be used, and examples of the method include hatching treatment, corona discharge treatment, flame treatment, low-pressure UV irradiation, and plasma treatment. It can. More preferably, for example, when triacetyl cellulose is used as the light-transmitting protective film, hatching treatment is preferable, and when a cycloolefin-based polymer is used, corona discharge treatment is preferable.
  • polarizing element corona discharge treatment is preferable.
  • the hatching treatment is performed by contacting with an alkaline aqueous solution, which is a normal method.
  • an alkaline aqueous solution potassium hydroxide, sodium hydroxide or the like is used, and the alkali concentration is about 0.1 to 10% by mass, preferably about 0.5 to 5% by mass, and more preferably about 1 to 3%.
  • a dilute solution of about mass% is sufficient.
  • treatment conditions mild conditions of 1 to 60 minutes at room temperature, preferably 30 minutes or less, more preferably 15 minutes or less are sufficient. Needless to say, it is necessary to wash thoroughly after treatment.
  • the corona discharge treatment may be performed under ordinary conditions, for example, on an isotropic substrate surface in contact with the pressure-sensitive adhesive layer.
  • the processing conditions vary depending on the substrate to be used and the type of corona processing apparatus.
  • the energy density is preferably 1 to 300 W ⁇ min / m 2 .
  • the surface tension increases by applying corona discharge treatment, but it is desirable to keep it higher than 40 dyn / cm.
  • the adhesive layer may be formed in the same manner as the liquid crystalline composition layer, and the adhesive layer is formed on a suitable substrate provided with an easy-release treatment such as silicone.
  • a so-called non-carrying adhesive may be used.
  • Optical anisotropic element and polarizer Applying pressure, heating, etc. using a laminator, roll, pressurizer, etc. to improve the strength of bonding, prevent the generation of bubbles due to residual air at the bonding interface, etc. May be.
  • the optically anisotropic element, the polarizing element and the translucent protective film are bonded, the optically anisotropic element, the polarizing element, and the translucent protective film can be continuously stacked and stacked in the state of being aligned in the MD direction in the form of a long film.
  • these three parties can also apply an optical anisotropic element and a translucent protection film to the polarizing element even if an optical anisotropic element and a translucent protective film are simultaneously bonded to both sides of the polarizing element. You may bond in order of a film, or in order of a translucent protective film and an optically anisotropic element.
  • the total thickness of the elliptically polarizing plate of the present invention thus obtained varies depending on the thickness of the translucent protective film, polarizing element, adhesive, optical anisotropic element, etc. used, but is preferably 150 ⁇ or less, preferably Is preferably 1 0 0 ⁇ ⁇ or less. If the total thickness exceeds 150 ⁇ m, the diameter of the film becomes too large when a long film is rolled over the film for a predetermined length, making it difficult to store in a conventional transport packaging container, If it can be stored in a container, the length is shortened, which is not preferable.
  • an elliptically polarizing plate in which at least one optical film is further laminated on the elliptically polarizing plate of the present invention may be used.
  • the optical film is not particularly limited as long as it is excellent in transparency and uniformity, but a polymer stretched film or a liquid crystalline film composed of liquid crystals can be preferably used.
  • the stretched polymer film include uniaxial or biaxial retardation films made of cellulose, polycarbonate, polyacrylate, polysulfone, polyacrylic, polyethersulfone, cyclic olefinic polymers, etc. be able to.
  • polycarbonate-based olefin-based polymers are preferable in terms of cost and film uniformity.
  • liquid crystalline film made of liquid crystal as used herein is not particularly limited as long as it is a film that can utilize the optical anisotropy generated from the alignment state by aligning the liquid crystal.
  • known ones such as various optical functional films using nematic liquid crystal, discotic liquid crystal, smectic liquid crystal and the like can be used.
  • the molecular alignment structure of liquid crystal films is smectic, nematic, twisted nematic Any of the molecular arrangement structures such as cholesteric and cholesteric may be used, and in the vicinity of the alignment substrate and in the vicinity of the air interface, they are in a homogenous alignment and a home-to-mouth alignment, respectively.
  • the so-called hybrid orientation in which the director is inclined from the normal direction of the film may also be used.
  • the optical film exemplified here may be used alone or in a plurality of sheets in constituting a liquid crystal display device.
  • both a polymer stretched film and a liquid crystal film can be used.
  • a liquid crystal display device to which the elliptically polarizing plate of the present invention is applied will be described.
  • the liquid crystal display device of the present invention has at least the elliptically polarizing plate.
  • the elliptically polarizing plate of the present invention is disposed in a liquid crystal cell, it is necessary to dispose the optically anisotropic element side of the elliptically polarizing plate on the liquid crystal cell side.
  • liquid crystal display devices include polarizing plates, liquid crystal cells, and retardation compensation plates, reflection layers, light diffusion layers, backlights, front lights, light control films, light guide plates, prism sheets, etc.
  • the elliptically polarizing plate is used.
  • the use position of the elliptically polarizing plate is not particularly limited, and may be one or more than one.
  • the polarizing plate used for the liquid crystal display device is not particularly limited, and those obtained from the same polarizing element as those used for the above-mentioned elliptically polarizing plate can be used.
  • the liquid crystal cell is not particularly limited, and a general liquid crystal cell such as a liquid crystal layer sandwiched between a pair of transparent substrates provided with electrodes can be used.
  • the transparent substrate constituting the liquid crystal cell is not particularly limited as long as the liquid crystal material constituting the liquid crystal layer is aligned in a specific alignment direction.
  • a transparent substrate in which the substrate itself has the property of aligning liquid crystals a transparent substrate in which the substrate itself lacks alignment ability, but has an alignment film having the property of aligning liquid crystals, etc. Any of these can be used.
  • a well-known thing can be used for the electrode of a liquid crystal cell. Usually, it can be provided on the surface of the transparent substrate in contact with the liquid crystal layer, and when a substrate having an alignment film is used, it can be provided between the substrate and the alignment film.
  • the material exhibiting liquid crystallinity for forming the liquid crystal layer is not particularly limited, and various ordinary low-molecular liquid crystal substances, high-molecular liquid crystal substances, and mixtures thereof that can constitute various liquid crystal cells Things.
  • a dye, a chiral agent, a non-liquid crystal substance, or the like can be added to these as long as liquid crystallinity is not impaired.
  • the liquid crystal cell may be provided with various components necessary for forming various types of liquid crystal cells described later.
  • Liquid crystal cell methods include TN (Twisted Neraatic) method, STN (Super Twisted Nematic) method, ECB (Electrically Controlled Birefringence; method, IPS (In-Plane Switching) method, VA (Vertical Alignment) method, OCB (Optically Compensated Birefringence) method, HAN (Hybrid Allocated Nematic) method, ASM (Axially Symmetric Aligned Microcell) method, noise tone grayscale method, domain division method, ferroelectric liquid crystal, anti-ferroelectric liquid crystal There are various methods such as a display method used.
  • the driving method of the liquid crystal cell there is no particular limitation on the driving method of the liquid crystal cell.
  • the elliptically polarizing plate of the present invention When the elliptically polarizing plate of the present invention is applied to a liquid crystal display device, even if the elliptically polarizing plate is closer to the observer side (front side) than the liquid crystal cell of the liquid crystal display device, It may be on the opposite side (rear) or on both sides of the liquid crystal cell.
  • the retardation compensation plate can be appropriately selected from the optical films used in the present invention, and may be used alone or in a plurality. Also, both a polymer stretched film and an optical compensation film made of liquid crystal can be used.
  • the reflective layer is not particularly limited, and metals such as aluminum, silver, gold, chromium, and platinum, alloys containing them, oxides such as magnesium oxide, dielectric multilayer films, liquid crystals exhibiting selective reflection, or combinations thereof Etc. can be illustrated. These reflective layers may be flat or curved.
  • the reflective layer is processed to have a diffused reflectivity by processing the surface shape such as uneven shape, the electrode on the electrode substrate opposite to the viewer side of the liquid crystal cell is combined, the thickness of the reflective layer It may be a transflective layer in which light is partially transmitted by thinning or making a hole or the like, or a combination thereof.
  • the light diffusion layer has the property of diffusing incident light isotropically or anisotropically. If there is, there is no particular limitation. For example, there are two or more types of regions that have a refractive index difference between them, and those that have irregularities in the surface shape. Examples of those having two or more regions and having a refractive index difference between the regions include those in which particles having a refractive index different from that of the matrix are dispersed in the matrix.
  • the light diffusing layer itself may have adhesiveness.
  • the film thickness of the light diffusing layer is not particularly limited, but it is usually desirable that it is 10 ⁇ or more and 500 m or less.
  • the total light transmittance of the light diffusion layer is preferably 50% or more, particularly preferably 70% or more. Further, the haze value of the light diffusion layer is usually 10 to 95%, preferably 40 to 90%, more preferably 60 to 90%.
  • the knock light, front light, light control film, light guide plate, and prism sheet are not particularly limited, and known materials can be used.
  • the liquid crystal display device of the present invention can be provided with other constituent members in addition to the constituent members described above. For example, by attaching a color filter to the liquid crystal display device of the present invention, a powerful liquid crystal display device capable of performing multicolor or full color display with high color purity can be manufactured. Next, an organic electroluminescence display device (organic EL display device) to which the elliptically polarizing plate of the present invention is applied will be described.
  • an organic EL display device forms a light emitter (organic electroluminescent light emitter) by sequentially laminating a transparent electrode, an organic light emitting layer, and a metal electrode on a transparent substrate.
  • the organic light emitting layer is a laminate of various organic thin films, for example, a laminate of a hole injection layer made of a triphenylamine derivative or the like and a light emitting layer made of a fluorescent organic solid such as anthracene,
  • a structure having various combinations such as a stacked body of an electron injection layer made of such a light emitting layer and a perylene derivative, or a stacked body of these hole injection layer, light emitting layer, and electron injection layer is known. It has been.
  • holes and electrons are injected into the organic light-emitting layer by applying a voltage to the transparent electrode and the metal electrode, and the energy generated by recombination of these holes and electrons is the phosphor material.
  • the excited phosphor returns to the ground state It emits light based on the principle of radiating light to 2.
  • the mechanism of recombination in the middle is the same as that of ordinary diodes. As can be expected from this, the current and emission intensity show a strong non-linear effect with rectification on the applied voltage.
  • At least one of the electrodes must be transparent in order to extract light emitted from the organic light-emitting layer, and is usually made of a transparent conductor such as indium tin oxide (( ⁇ ⁇ ).
  • the electrode is used as the anode.
  • metal electrodes such as Mg-Ag and A1-Li are used.
  • the organic light emitting layer is formed of a very thin film having a thickness of about 10 nm. For this reason, the organic light emitting layer transmits light almost completely like the transparent electrode. As a result, light that is incident from the surface of the transparent substrate when not emitting light, passes through the transparent electrode and the organic light-emitting layer, and is reflected by the metal electrode is emitted again to the surface side of the transparent substrate.
  • the display surface of the organic EL display device looks like a mirror surface.
  • an organic EL display device comprising an organic electroluminescent phosphor comprising a transparent electrode on the front side of an organic light emitting layer that emits light upon application of a voltage and a metal electrode on the back side of the organic light emitting layer, While providing a polarizing plate on the surface side, a retardation plate can be provided between the transparent electrode and the polarizing plate.
  • the phase difference plate and the polarizing plate have a function of polarizing light incident from the outside and reflected by the metal electrode, there is an effect that the mirror surface of the metal electrode cannot be seen from the outside by the polarization action.
  • the retardation plate is composed of a quarter-wave plate and the angle formed by the polarization direction of the polarizing plate and the retardation plate is adjusted to ⁇ ⁇ 4, the mirror surface of the metal electrode can be completely shielded. .
  • linearly polarized light becomes generally elliptically polarized light by the phase difference plate, but becomes circularly polarized light especially when the phase difference plate is a 1/4 wavelength plate and the angle between the polarization direction of the polarizing plate and the phase difference plate is ⁇ / 4. .
  • This circularly polarized light passes through the transparent substrate, transparent electrode, and organic thin film, is reflected by the metal electrode, passes through the organic thin film, transparent electrode, and transparent substrate again, and becomes linearly polarized light again on the retardation plate. And since this linearly polarized light is orthogonal to the polarization direction of the polarizing plate, it passes through the polarizing plate. Can not. As a result, the mirror surface of the metal electrode can be completely shielded.
  • the observer side (front side) arrangement of the organic EL display device is viewed from the observer side. Better to do.
  • the elliptically polarizing plate of the present invention has a feature that the number of laminate layers constituting the elliptically polarizing plate is small, and there is no peeling or generation of bubbles at the interface even under high temperature and high humidity conditions.
  • the film can be bonded in the form of a long film in the bonding process with the polarizing element, the bonding process can be streamlined and has great industrial value.
  • optical parameters such as ⁇ n ⁇ d are values at a wavelength of 550 nm unless otherwise specified.
  • the alignment state of the liquid crystal was observed with a BH 2 polarizing microscope manufactured by Olympus Optical Co., Ltd.
  • a TAC film (40 ⁇ , manufactured by Fuji Photo Film Co., Ltd.) was immersed in a 2% by weight aqueous solution of potassium hydroxide for 5 minutes at room temperature for hatching treatment, washed in running water, and then dried.
  • An experimental TAC film was bonded to one surface of a polarizing element in which iodine was adsorbed to stretched polyvinyl alcohol, using an acrylic adhesive as the adhesive layer 1 to produce a laminate A.
  • the total film thickness was approximately 65 ⁇ , which was thinner than the usual one (1 05 ⁇ ).
  • This liquid crystalline polyester has a logarithmic viscosity of 0.17 (d 1 / g), a nematic phase as a liquid crystal phase, an isotropic phase transition temperature of 250 ° C or higher, and a glass transition point of 1 1 5 . C.
  • a rubbing roll of 1 50 mm ⁇ wrapped with a Yon cloth was set obliquely and rotated at a high speed to perform continuous rubbing to obtain an oriented substrate film having a rubbing angle of 25 °.
  • the rubbing angle is the angle in the counterclockwise direction from the MD direction when the rubbing surface is viewed from above.
  • the liquid crystalline composition solution ⁇ is continuously applied and dried on the alignment substrate film using a die coater, and then heated at 150 ° C. for 10 minutes to align the liquid crystal raw composition.
  • the alignment was fixed by cooling to room temperature, to obtain a laminate D of a liquid crystalline composition layer (optical anisotropic element) and a PEEK film.
  • the thickness of the liquid crystal composition layer of the obtained laminate D was 4 ⁇ m.
  • the PEEK film used as the alignment substrate has a large birefringence, it is difficult to measure the optical parameters of the liquid crystalline composition layer in the form of Laminate D. Therefore, on the triacetylcellulose (TAC) film as follows: The liquid crystal composition layer was transferred. That is, an ultraviolet curable adhesive was applied to the liquid crystal composition layer on the PEEK film so as to have a thickness of 5 ⁇ m, and laminated with a TAC film (40 ⁇ m thickness, manufactured by Fuji Photo Film Co., Ltd.).
  • TAC triacetylcellulose
  • the adhesive was cured by irradiating ultraviolet rays from the TAC film side, and then the PEEK film was peeled off to obtain a laminate comprising a liquid crystalline composition layer / adhesive layer / TAC film.
  • the obtained laminate was subjected to parameter measurement using RETS-100 manufactured by Otsuka Electronics Co., Ltd. As a result, the twisted nematic orientation was found, the twist angle was 1240 degrees, and An'd was 800 nm.
  • a commercially available UV curable adhesive (UV-3400, manufactured by Toagosei Co., Ltd.) was applied as an adhesive layer 2 to a thickness of 5 ⁇ m on the optically anisotropic element of laminate D, and the above-mentioned production was performed thereon.
  • the laminate A was laminated on the polarizing element side, and the adhesive layer 2 was cured by UV irradiation of about 60 Om J.
  • the optically anisotropic element is laminated by peeling the PEEK film from the ZT AC film laminated body.
  • elliptical polarizing plate E composed of TAC film Z adhesive layer 1 / polarizing element / adhesive layer 2Z optically anisotropic element was obtained.
  • the total thickness of the elliptically polarizing plate E was 75 ⁇ .
  • optical inspection of this elliptical polarizing plate ⁇ ⁇ showed no damage such as spots or scratches.
  • the optically anisotropic element side of this elliptical polarizing plate is attached to a glass plate with an acrylic adhesive, placed in a constant temperature and humidity chamber of 60 ° C 90% RH, and taken out after 500 hours. When observed, no abnormalities such as peeling or foaming were observed.
  • EL— 4 3 6 A aqueous solution with a solid content concentration of 35%) manufactured by Toyo Morton Co., Ltd., which is a polyester polyol precursor, the main component, isocyanate-based curing agent.
  • EL— 4 3 6 B active ingredient 100% product manufactured by Toyo Morton Co., Ltd. is mixed with 30 parts and further diluted with water to a solid content concentration of 20% did.
  • a polybulur alcohol adhesive As a polybulur alcohol adhesive,
  • Kuraray Co., Ltd. carboxyl group-modified polybulal alcohol "Kuraraypoval KL 3 1 8" (saponification degree of copolymer with a molar ratio of butyl acetate to sodium itaconate of about 9 8: 2, saponification degree 8 5-9
  • a 3% aqueous solution with 0 mol% and a molecular weight of about 85,00) was prepared.
  • the obtained urethane adhesive and polybulal alcohol aqueous solution were mixed at a mass ratio of 1: 1 (20: 3 in terms of solid content mass ratio) to obtain a mixed adhesive.
  • the mixed adhesive prepared as the adhesive layer 1 was applied to one side of the polarizing element in which iodine was adsorbed to the stretched polybulal alcohol within 1 minute after mixing.
  • the total film thickness was about 6 5 ⁇ ⁇ , which was thinner than the normal one (1 0 5 ⁇ ⁇ ).
  • UV curable adhesive (UV-3400, manufactured by Toagosei Co., Ltd.) was applied to the optical anisotropic element of the laminate D prepared in Example 1 to a thickness of 5 ⁇ 2
  • the polarizing element side of the laminate F was laminated, and the adhesive layer 2 was cured by UV irradiation of about 60 mJ.
  • the PEEK film is peeled off from the laminate in which PE EK film / optical anisotropic element / adhesive layer 2 / polarizing element Z adhesive 1 / Zeonor film becomes a laminated body.
  • the film was transferred onto F, and an elliptically polarizing plate G composed of Zeonor film / adhesive layer 1 Z polarizing element / adhesive layer 2 Z optical anisotropic element was obtained.
  • the total thickness of the elliptically polarizing plate G was 75 ⁇ .
  • this elliptical polarizing plate G was optically inspected, no damage such as a scratch was observed.
  • the optically anisotropic element side of this elliptically polarizing plate G was shelled on a glass plate with an acrylic adhesive, placed in a thermostatic chamber at 60 ° C 90% RH, and taken out after 500 hours and observed. No abnormalities such as peeling or foaming were observed.
  • a solution of the liquid crystal composition prepared by changing the mixing ratio of the polymer 1 and the polymer 2 synthesized in Example 1 was continuously applied to the polarizing element side of the laminate F produced in Example 2 using a die coater. After coating and drying, the liquid crystal composition was oriented by heat treatment at 150 ° C. for 10 minutes. Next, it was cooled to room temperature and the orientation was fixed, and an elliptically polarizing plate H composed of ZEONA film Z adhesive layer 1 / polarizing element Z optical anisotropic element was obtained. The total thickness of the elliptically polarizing plate H was 70 ⁇ .
  • This optically anisotropic element layer had a twisted nematic orientation, a twist angle of 165 °, and ⁇ nd was 190 nm.
  • this ellipsoidal polarizing plate H was subjected to polarization analysis with an ellipsometer (DVA—36 VWLD, manufactured by Mizojiri Optical Industry Co., Ltd.), the ellipticity at a wavelength of 550 nm was 0.94, and it had good circular polarization characteristics. It was confirmed that it was a circularly polarizing plate.
  • this elliptical polarizing plate H was optically inspected, no damage such as spots or scratches was found.
  • the optically anisotropic element side of this elliptical polarizing plate H is shelled on a glass plate with an acrylic adhesive, placed in a constant temperature and humidity chamber at 60 ° C 90% RH, taken out after 500 hours, and observed. No abnormalities such as peeling or foaming were observed.
  • the liquid crystal composition solution B prepared in Example 1 was continuously applied to the PVA alignment film of the laminate J using a die coater and dried, followed by heat treatment at 150 ° C for 10 minutes. The composition was oriented. Next, the alignment was fixed by cooling to room temperature, and an elliptically polarizing plate K composed of zeonofilm / adhesive layer 1 / polarizing element / PVA alignment film optically anisotropic element was obtained. The total thickness of the elliptically polarizing plate K was 73 / m.
  • this elliptical polarizing plate K was optically inspected, no damage such as scratches was found.
  • the optically anisotropic element side of this elliptical polarizing plate K is attached to a glass plate with an acrylic adhesive, placed in a constant temperature and humidity chamber at 60 ° C and 90% RH, taken out after 500 hours, and peeled off. There were no abnormalities such as bubbles or bubbles.
  • the optically anisotropic element side of the laminate D produced in Example 1 was transferred to a triacetyl cellulose (TAC) film (40 ⁇ ) via an ultraviolet curable adhesive.
  • TAC triacetyl cellulose
  • an adhesive is applied to a thickness of 5 ⁇ m, laminated with a TAC film, and then irradiated with UV light from the TAC film side for adhesion.
  • the PEEK film was peeled off to obtain a laminate L (optical anisotropic element Z adhesive layer / TAC film).
  • a polarizing plate M was prepared by laminating a hatched T A C film on both sides of a polarizing element in which iodine was adsorbed to stretched polybulal alcohol, using an acetyl-based adhesive.
  • the optically anisotropic element side of the laminate L was bonded to this polarizing plate M via an acryl-based adhesive to produce an elliptical polarizing plate N.
  • This elliptical polarizing plate N is as thick as about 200 im, and since the thickness of the elliptical polarizing plate becomes large, the processing length in one operation does not have to be shorter than the production of the elliptical polarizing plates of Examples 1 to 4. Did not get.
  • the TAC film on the optically anisotropic element side of the elliptically polarizing plate N was coated with atalyl-based adhesive and attached to a glass plate. The same test as in Example 1 was conducted. Peeling of mm was observed. 0562
  • an STN-type transmissive liquid crystal display device was produced with the arrangement shown in FIG.
  • the device was manufactured by making the counterclockwise direction ten from the polarizing element 4 side toward the liquid crystal cell 8 side and making the clockwise direction one, and the experiment was performed.
  • the same result can be obtained even if a similar experiment is performed with the clockwise direction + toward cell 8 and the counterclockwise direction as one.
  • FIG. 8 shows the relationship between the angles ⁇ i to e 5 in each component of the above STN type transflective liquid crystal display device.
  • the orientation direction 81 on the surface on the elliptically polarizing plate 1 side of the liquid crystal layer in the liquid crystal cell 8 and the orientation direction 82 on the surface on the polarizing plate 9 side form an angle 01.
  • the orientation axis direction 61 of the optical anisotropic element 6 on the surface of the polarizing element 4 side and the orientation axis direction 62 of the surface on the liquid crystal cell 8 side form an angle ⁇ 2.
  • the absorption axis 41 of the polarizing element 4 and the orientation axis direction 6 1 on the surface of the optical anisotropic element 6 on the polarizing element 4 side form an angle 0 3
  • the absorption axis 4 1 of the polarizing element 4 and the liquid crystal
  • the orientation direction 8 1 on the plane of the polarizing element 4 side of the liquid crystal layer in the cell 8 forms an angle ⁇ 4.
  • the absorption axis 9 1 of the polarizing plate 9 forms an angle 0 5 with the absorption axis 41 of the polarizing element 4.
  • the product ⁇ nd of the refractive index anisotropy ⁇ n of the liquid crystal substance in the liquid crystal cell 8 and the thickness d of the liquid crystal layer was about 830 nm.
  • the optical anisotropic element 6 was produced in the same manner as the optical anisotropic element of Example 1.
  • the angle ⁇ 3 + 45 degrees from the absorption axis 41 of the polarizing element 4 to the orientation axis 61 on the polarizing plate side surface of the optical anisotropic element 6, the liquid crystal layer from the absorption axis 41 of the polarizing element 4
  • An ordinary transparent adhesive layer is placed between the elliptically polarizing plate 1 and the liquid crystal cell 8 and the polarizing plate 9. 7060562.
  • Driving voltage is applied to the above liquid crystal display device from a drive circuit (not shown) (driven at 1/2 40 duty, optimum bias), and backlight 10 is placed to light up
  • the elliptically polarizing plate H produced in Example 3 is used as the elliptically polarizing plate 1 defined in FIG. 9 as a commercially available organic EL display 1 on the transparent glass substrate 12 of the organic EL element of 1 through an acrylic adhesive.
  • the organic EL display device was created by sticking. As a result, it was found that an organic EL display device that exhibits a significant effect of preventing external light reflection and has excellent visibility as compared with the case where the elliptically polarizing plate of the present invention is not disposed can be obtained.
  • Acetylation reaction was carried out at 140 ° C for 2 hours under an atmosphere. Subsequently, polymerization was carried out at 270 ° C for 2 hours, at 280 ° C for 2 hours, and at 300 ° C for 2 hours.
  • This liquid crystalline polyester has a logarithmic viscosity of 0.35 (d 1 / g), a nematic phase as a liquid crystal phase, an isotropic liquid crystal phase transition temperature of 300 ° C or higher, and a glass transition point of 1 35 ° C. It was.
  • the thickness of the obtained laminated body P was 0.6 ⁇ .
  • ⁇ ⁇ ⁇ used as an alignment substrate has a large birefringence, so it is difficult to measure the optical parameters of the liquid crystalline polymer layer in the laminate ⁇ form, so on the triacetyl cellulose (TAC) film, Then, the liquid crystalline polymer layer was transferred.
  • TAC triacetyl cellulose
  • this liquid crystalline polymer layer has a hybrid nematic alignment structure.
  • the second layer has a thickness of 90 nm and an average tilt angle of 28. It was a degree.
  • a commercially available UV curable adhesive (UV-3340, manufactured by Toagosei Co., Ltd.) on the liquid crystal polymer layer (optically anisotropic element) of laminate P as an adhesive layer 2 with a thickness of 5 ⁇ m
  • the polarizing element side of the laminate A produced in Example 1 was laminated thereon, and the adhesive layer 2 was cured by UV irradiation of about 60 Om J.
  • the optical anisotropic element is laminated on the laminate A by peeling the PEEK film from the ZTAC film integrated body.
  • an elliptically polarizing plate Q composed of TAC film Z adhesive layer 1 / polarizing element / adhesive layer 2 / optically anisotropic element.
  • the total thickness of the elliptically polarizing plate Q was 75.
  • this elliptical polarizing plate Q When this elliptical polarizing plate Q was optically inspected, no damage such as a scratch was observed. When the optically anisotropic element side of this elliptical polarizing plate Q is attached to a glass plate with an acrylic adhesive, it is placed in a constant temperature and humidity chamber at 60 ° C 90% RH, taken out after 500 hours, and peeled off. There were no abnormalities such as bubbles or bubbles. 2
  • UV curable adhesive (UV-3400, manufactured by Toagosei Co., Ltd.) was applied to the optically anisotropic element of the laminate P prepared in Example 7 to a thickness of 5 ⁇ m. Then, the polarizing element side of the laminate F produced in Example 2 was laminated thereon, and the adhesive layer 2 was cured by UV irradiation of about 60 mJ. Then, PEEK film / optical anisotropic element / adhesive layer 2 no-polarization element Z adhesive 1 / Zeonor film is laminated on the laminate F by peeling the PEEK film from the laminate.
  • UV-3400 manufactured by Toagosei Co., Ltd.
  • an elliptically polarizing plate R composed of Xenoah film / adhesive layer 1 Z polarizing element / adhesive layer 2 / optically anisotropic element was obtained.
  • the total thickness of the elliptically polarizing plate R was 75 ⁇ .
  • the optically anisotropic element side of this elliptical polarizing plate R is attached to a glass plate with an acrylic adhesive, placed in a constant temperature and humidity chamber of 60 ° C 90% RH, and taken out after lapse of 500 hours. As a result, no abnormality such as peeling or foaming was found.
  • Example 2 While transporting the laminate F produced in Example 2, a 150 mm labinda roll wrapped with a rayon cloth is set obliquely and is rubbed continuously by rotating at high speed, with a rubbing angle of 45 °. An oriented substrate film was obtained. Here, the rubbing angle is the angle counterclockwise from the MD direction when the rubbing surface is viewed from above.
  • the liquid crystalline polymer solution C prepared in Example 7 was continuously applied and dried at a coating speed different from that in Example 7 using a die coater, and then heated at 150 ° C for 10 minutes. The liquid crystalline polymer was aligned.
  • an elliptically polarizing plate S (Zeonor film Z adhesive layer 1 Z polarizing element Z optical anisotropic element) having an optical anisotropic element composed of a liquid crystalline polymer layer.
  • the total thickness of the elliptically polarizing plate S was 70 ⁇ m.
  • Example 7 only the liquid crystalline polymer layer was transferred to a TAC film, and the optical parameters were measured. As a result, this polymer liquid crystal layer formed a hybrid nematic alignment structure. ⁇ nd of 90 nm, average tilt angle is 28 degrees Met.
  • this elliptical polarizing plate s was optically inspected, no damage such as a scratch was observed. Adhere the optically anisotropic element side of this elliptical polarizing plate S to a glass plate with an acrylic adhesive, place it in a constant temperature and humidity chamber at 60 ° C 90% RH, and take it out after lapse of 500 hours. As a result, no abnormality such as peeling or foaming was found.
  • Example 4 While transporting the laminate J produced in Example 4, a 15 Onim 0 rubbing roll with a rayon cloth attached to the PVA alignment film surface was set obliquely and rotated continuously at a high speed. Rubbing was performed to obtain an oriented substrate film with a rubbing angle of 45 °. Here, the rubbing angle is the angle in the counterclockwise direction from the MD direction when the rubbing surface is viewed from above.
  • the liquid crystalline polymer solution C prepared in Example 7 was continuously applied and dried in the same manner as in Example 9 using a die coater, and then heat-treated for 15 minutes at 150 ° C for 10 minutes. The molecules were oriented.
  • an elliptically polarizing plate T (Zeonor film / adhesive layer 1 Z polarizing element / PVA alignment film / optical anisotropic element) having an optical anisotropic element composed of a liquid crystalline polymer layer )
  • the total thickness of the elliptically polarizing plate T was 7 3 ⁇ .
  • a polarizing plate U was prepared by bonding an experimental T A C film on both sides of a polarizing element in which iodine was adsorbed to stretched polyvinyl alcohol, using an attayl-based adhesive.
  • the optically anisotropic element side of the laminate P produced in Example 7 was passed through an ultraviolet curable adhesive. And transferred to a triacetyl cellulose (TAC) film (40 ⁇ ).
  • TAC triacetyl cellulose
  • ⁇ ⁇ Adhesive is applied to the liquid crystalline polymer layer on the film to a thickness of 5 ⁇ , laminated with TAC film, and then irradiated with UV light from the TAC film side. After the adhesive was cured, the PEEK film was peeled off to obtain laminate V (optical anisotropic element Z adhesive layer TAC film).
  • the optically anisotropic element side of the laminate V was bonded to the polarizing plate U via an acryl-based adhesive to prepare an elliptically polarizing plate W.
  • the elliptically polarizing plate W is as thick as a thickness of about 200 M m, if the processing length of a single operation to a thickness larger wind-shorter than the generation of elliptically polarizing plate of Example 7-1 0 I had to.
  • Example 7 Using the elliptically polarizing plate Q obtained in Example 7, a transmission type liquid crystal display device having the arrangement as shown in FIG. 10 was produced.
  • the liquid crystal cell 8 used was homogeneously aligned using ZLI-1 695 (manufactured by Merck) as the liquid crystal material.
  • the thickness of the liquid crystal layer was 4.9 ⁇
  • the pretilt angle at the both interfaces of the substrate of the liquid crystal layer was 2 degrees
  • ⁇ d of the liquid crystal cell was about 320 nm.
  • a polarizing plate 9 (thickness of about 100 ⁇ m; SQW-06 2 manufactured by Sumitomo Chemical Co., Ltd.) is placed on the viewer side (upper side of the figure) of the liquid crystal cell 8, and between the polarizing plate 9 and the liquid crystal cell 8.
  • a retardation compensation plate 16 made of a uniaxially stretched polycarbonate film manufactured by Nippon Zeon Co., Ltd .: ⁇ nd is approximately 140 nm
  • Example 7 the elliptically polarizing plate Q obtained in Example 7 was placed on the backlight side (lower side of the figure) of the liquid crystal cell.
  • the absorption axis of the polarizing plate 9 and the polarizing element 4, the slow axis of the retardation compensation plate 16, the pretilt direction of both interfaces of the liquid crystal cell 8, and the tilt direction of the optically anisotropic element 6 are arranged under the conditions described in FIG. did.
  • a backlight 10 is provided on the back side of the elliptically polarizing plate 1.
  • a drive voltage from 0 V to 5 V is supplied from a drive circuit (not shown).
  • FIG. 1 is a conceptual diagram for explaining the tilt angle and twist angle of liquid crystal molecules.
  • FIG. 2 is a conceptual diagram of the alignment structure of the liquid crystalline film constituting the optical anisotropic element.
  • FIG. 3 is a conceptual diagram illustrating the pretilt direction of the liquid crystal cell.
  • FIG. 4 is an elevational sectional view schematically showing a configuration example of the elliptically polarizing plate of the present invention.
  • FIG. 5 is an elevational sectional view schematically showing another configuration example of the elliptically polarizing plate of the present invention.
  • FIG. 6 is an elevational sectional view schematically showing another configuration example of the elliptically polarizing plate of the present invention.
  • FIG. 7 is a conceptual diagram of the liquid crystal display used in Example 5.
  • FIG. 8 is a plan view illustrating the relationship between the absorption axis of the polarizing plate, the liquid crystal cell, and the axial angle of the optically anisotropic layer in the liquid crystal display device of Example 5.
  • FIG. 9 is a conceptual diagram of the organic EL display used in Example 6.
  • FIG. 10 is a conceptual diagram of the liquid crystal display used in Example 11.
  • FIG. 11 is a plan view illustrating the relationship between the absorption axis of the polarizing plate, the liquid crystal cell, and the axial angle of the optically anisotropic layer in the liquid crystal display device of Example 11.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne une lame de polarisation elliptique dans laquelle une couche de protection transmettant la lumière, un élément polarisant et un élément optiquement anisotrope sont agencés en couches, dans cet ordre. La lame de polarisation elliptique ne présente pas de problème comme ceux de la séparation des couches même dans des conditions de haute température ou de forte humidité à cause de la simplification de sa structure en couches. Cette lame de polarisation elliptique est caractérisée en ce que l'élément optiquement anisotrope contient une couche de cristal liquide qui est obtenue en alignant une composition de cristal liquide présentant au moins une uniaxialité positive dans un mode nématique en hélice ou dans un mode nématique hybride à l'état de cristal liquide et en bloquant l'alignement.
PCT/JP2007/060562 2006-05-30 2007-05-17 Lame de polarisation elliptique, procédé de fabrication de lame de polarisation elliptique, affichage à cristaux liquides et affichage électroluminescent WO2007142037A1 (fr)

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KR1020087032072A KR101397301B1 (ko) 2006-05-30 2007-05-17 타원편광판, 타원편광판의 제조방법, 액정표시장치 및 전장발광 표시장치
CN200780019909.XA CN101454699B (zh) 2006-05-30 2007-05-17 椭圆偏振片、椭圆偏振片的制造方法、液晶显示装置及电致发光显示装置

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JP2006149819A JP2007322498A (ja) 2006-05-30 2006-05-30 楕円偏光板、楕円偏光板の製造方法、液晶表示装置およびエレクトロルミネッセンス表示装置
JP2006-149819 2006-05-30
JP2006153247A JP2007322778A (ja) 2006-06-01 2006-06-01 楕円偏光板、楕円偏光板の製造方法および液晶表示装置
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JP2012073429A (ja) * 2010-09-29 2012-04-12 Fujifilm Corp 偏光板、それを用いた液晶表示装置、及び耐湿熱性偏光板用保護フィルム
JP2012073430A (ja) * 2010-09-29 2012-04-12 Fujifilm Corp 偏光板、それを用いた液晶表示装置、及び耐湿熱性偏光板用保護フィルム
EP3032603A1 (fr) * 2014-12-08 2016-06-15 Samsung Electronics Co., Ltd Film antireflet et dispositif électroluminescent organique comprenant celui-ci
CN105679952A (zh) * 2014-12-08 2016-06-15 三星电子株式会社 抗反射膜和包括其的有机发光器件
EP3575836A4 (fr) * 2017-01-25 2020-01-15 LG Chem, Ltd. Filtre optique pour antireflet et dispositif électroluminescent organique

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JP6335422B2 (ja) * 2012-06-29 2018-05-30 日東電工株式会社 円偏光板および有機ｅｌパネル
KR102515564B1 (ko) * 2016-05-19 2023-03-28 삼성전자주식회사 유기 발광 장치
JP7225509B2 (ja) * 2018-09-04 2023-02-21 エルジー・ケム・リミテッド 透過度可変デバイス
KR102442852B1 (ko) 2018-09-04 2022-09-14 주식회사 엘지화학 투과도 가변 디바이스
KR20220011678A (ko) * 2019-05-28 2022-01-28 도요보 가부시키가이샤 원편광 소자 전사용 적층체 및 이것을 이용한 광학 물품의 제조 방법
CN112864208A (zh) * 2021-01-25 2021-05-28 京东方科技集团股份有限公司 显示面板和显示装置

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JP2012073429A (ja) * 2010-09-29 2012-04-12 Fujifilm Corp 偏光板、それを用いた液晶表示装置、及び耐湿熱性偏光板用保護フィルム
JP2012073430A (ja) * 2010-09-29 2012-04-12 Fujifilm Corp 偏光板、それを用いた液晶表示装置、及び耐湿熱性偏光板用保護フィルム
EP3032603A1 (fr) * 2014-12-08 2016-06-15 Samsung Electronics Co., Ltd Film antireflet et dispositif électroluminescent organique comprenant celui-ci
CN105679952A (zh) * 2014-12-08 2016-06-15 三星电子株式会社 抗反射膜和包括其的有机发光器件
EP3032604A1 (fr) * 2014-12-08 2016-06-15 Samsung Electronics Co., Ltd Film antireflet et dispositif électroluminescent organique comprenant celui-ci
JP2016110153A (ja) * 2014-12-08 2016-06-20 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 反射防止フィルムおよびこれを備えた有機発光装置
JP2016110152A (ja) * 2014-12-08 2016-06-20 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 反射防止フィルムおよびこれを備えた有機発光装置
US9583543B2 (en) 2014-12-08 2017-02-28 Samsung Electronics Co., Ltd. Antireflection film and organic light emitting device including the same
US9766384B2 (en) 2014-12-08 2017-09-19 Samsung Electronics Co., Ltd. Antireflection film and organic light emitting device provided with the same
EP3575836A4 (fr) * 2017-01-25 2020-01-15 LG Chem, Ltd. Filtre optique pour antireflet et dispositif électroluminescent organique
US10943960B2 (en) 2017-01-25 2021-03-09 Lg Chem, Ltd. Optical filter for anti-reflection and organic light-emitting device

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CN101454699A (zh) 2009-06-10
KR20090027225A (ko) 2009-03-16

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