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WO2014157102A1 - Retardateur, polariseur circulaire et dispositif d'affichage d'image en trois dimensions - Google Patents

Retardateur, polariseur circulaire et dispositif d'affichage d'image en trois dimensions Download PDF

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Publication number
WO2014157102A1
WO2014157102A1 PCT/JP2014/058104 JP2014058104W WO2014157102A1 WO 2014157102 A1 WO2014157102 A1 WO 2014157102A1 JP 2014058104 W JP2014058104 W JP 2014058104W WO 2014157102 A1 WO2014157102 A1 WO 2014157102A1
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WIPO (PCT)
Prior art keywords
anisotropic layer
retardation
optically anisotropic
liquid crystal
optical anisotropic
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Ceased
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PCT/JP2014/058104
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English (en)
Japanese (ja)
Inventor
市橋　光芳
齊藤　之人
佐藤　寛
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Fujifilm Corp
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Fujifilm Corp
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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
    • G02B5/3083—Birefringent or phase retarding elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • 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
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133631—Birefringent elements, e.g. for optical compensation with a spatial distribution of the retardation value
    • 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
    • G02F2413/02—Number of plates being 2

Definitions

  • the present invention relates to a retardation plate (optical film), and more particularly to a retardation plate having a patterned optical anisotropic layer containing a twisted liquid crystal compound. Moreover, this invention relates to the circularly-polarizing plate or 3D image display apparatus which has the said phase difference plate.
  • an optical device that converts linearly polarized light into circularly polarized light in order to prevent deterioration of display characteristics with respect to face rotation or to separate a right eye image and a left eye image.
  • a member may be used.
  • an optical member for example, a so-called ⁇ / 4 plate formed by using a liquid crystal compound, or a pattern retardation plate in which regions having different slow axes and retardations are regularly arranged in a plane Is used (see, for example, Patent Document 1).
  • an object of the present invention is to provide a phase difference plate in which coloring when a face is inclined is suppressed when it is attached to a display device as a circularly polarizing plate.
  • Another object of the present invention is to provide a circularly polarizing plate and a 3D image display device having the retardation plate.
  • the present inventors have found that the above problem can be solved by using a patterned optically anisotropic layer containing a twisted liquid crystal compound. That is, it has been found that the above object can be achieved by the following configuration.
  • a retardation plate having at least an optically anisotropic layer The pattern optical anisotropic layer is a layer in which a first pattern optical anisotropic layer and a second pattern optical anisotropic layer are laminated, The in-plane slow axis of the first retardation region of the second patterned optically anisotropic layer is orthogonal to the in-plane slow axis of the second retardation region of the second patterned optically anisotropic layer, In the first retardation region and the second retardation region, an in-plane slow axis on the surface of the first pattern optical anisotropic layer on the second pattern optical anisotropic layer side, and the second pattern optical anisotropic layer Is parallel to the in-plane slow axis of
  • the first pattern optical anisotropic layer includes a
  • Formula (1) 142 nm ⁇ ⁇ nd ⁇ 202 nm
  • Formula (2) 151 nm ⁇ ReB (550) ⁇ 211 nm
  • the liquid crystal compound is a discotic liquid crystal compound or a rod-like liquid crystal compound.
  • a circularly polarizing plate comprising at least a polarizing film and the retardation plate according to any one of (1) to (4), Having a polarizing film, a second patterned optically anisotropic layer, and a first patterned optically anisotropic layer in this order,
  • a circularly polarizing plate that satisfies any one of requirements (a) and (b) described later when a retardation film is observed from a polarizing film and counterclockwise is represented by a positive angle value.
  • a retardation plate having at least an optically anisotropic layer The pattern optical anisotropic layer is a layer in which a first pattern optical anisotropic layer and a second pattern optical anisotropic layer are laminated, The in-plane slow axis of the first retardation region of the second patterned optically anisotropic layer is orthogonal to the in-plane slow axis of the second retardation region of the second patterned optically anisotropic layer, In the first retardation region and the second retardation region, an in-plane slow axis on the surface of the first pattern optical anisotropic layer on the second pattern optical anisotropic layer side, and the second pattern optical anisotropic layer Is perpendicular to the in-plane slow axis of
  • the first pattern optical anisotropic layer
  • Expression (3) 203 nm ⁇ ⁇ nd ⁇ 263 nm
  • Formula (4) 158 nm ⁇ ReB (550) ⁇ 218 nm
  • the retardation plate according to (6), wherein the second patterned optically anisotropic layer contains a liquid crystal compound that is homogeneously aligned in the first retardation region and the second retardation region.
  • the liquid crystal compound is a discotic liquid crystal compound or a rod-like liquid crystal compound.
  • a circularly polarizing plate comprising at least a polarizing film and the phase difference plate according to any one of (6) to (9), A polarizing film, a first patterned optically anisotropic layer, and a second patterned optically anisotropic layer in this order; A circularly polarizing plate that satisfies any one of requirements (c) and (d) described later when a retardation film is observed from a polarizing film and counterclockwise is represented by a positive angle value.
  • a display panel driven based on an image signal The retardation plate according to any one of (1) to (4) and (6) to (9) disposed on the viewing side of the display panel, or any of (5) and (10)
  • a 3D image display device having at least the circularly polarizing plate according to one.
  • the phase difference plate by which the coloring at the time of face inclination is suppressed can be provided.
  • the circularly-polarizing plate and 3D image display apparatus which have this phase difference plate can also be provided.
  • FIG. 1 It is a perspective sectional view of the 1st embodiment of the phase contrast plate of the present invention.
  • the figure which shows the relationship of each in-plane slow axis of the 1st pattern optical anisotropic layer 16a and the 2nd pattern optical anisotropic layer 18a in one aspect of the 1st embodiment of the phase difference plate of this invention.
  • (A) is a partially enlarged perspective cross-sectional view of the retardation film
  • (B) is the first position of the first pattern optical anisotropic layer 16a when observed from the direction of the arrow in FIG.
  • FIG. 1 is a partially enlarged perspective sectional view of the retardation plate
  • B is the first position of the first pattern optical anisotropic layer 16b when observed from the direction of the arrow in FIG.
  • the absorption axis of the polarizing film 32 and the respective in-planes of the first pattern optical anisotropic layer 16a and the second pattern optical anisotropic layer 18a It is a figure which shows the relationship (b) with a slow axis, (A) is a partially expanded perspective sectional view of a circularly-polarizing plate, (B) is when observed from the direction of the arrow of (A) figure, Angles between the absorption axis of the polarizing film 32, the in-plane slow axis of the first pattern optical anisotropic layer 16a, and the in-plane slow axis of the second pattern optical anisotropic layer 18a in the first retardation region.
  • FIG. 6C is a schematic diagram showing the relationship between the absorption axis of the polarizing film 32 and the first pattern optical anisotropic layer in the second retardation region when observed from the direction of the arrow in FIG. It is the schematic which shows the relationship of the angle of the in-plane slow axis of 16a, and the in-plane slow axis of the 2nd pattern optically anisotropic layer 18a. It is an example of the schematic sectional drawing of the 2nd embodiment of the circularly-polarizing plate of this invention. It is an example of the schematic sectional drawing of the 3rd embodiment of the circularly-polarizing plate of this invention.
  • the absorption axis of the polarizing film 32 and the respective in-planes of the first pattern optical anisotropic layer 16b and the second pattern optical anisotropic layer 18b It is a figure which shows the relationship (d) with a slow axis, (A) is a partial expanded perspective sectional view of a circularly-polarizing plate, (B) is when observed from the direction of the arrow of (A) figure, Angles between the absorption axis of the polarizing film 32, the in-plane slow axis of the first pattern optical anisotropic layer 16b, and the in-plane slow axis of the second pattern optical anisotropic layer 18b in the first retardation region.
  • FIG. 6C is a schematic diagram showing the relationship between the absorption axis of the polarizing film 32 and the first pattern optical anisotropic layer in the second retardation region when observed from the direction of the arrow in FIG. It is the schematic which shows the relationship of the angle of the in-plane slow axis of 16b, and the in-plane slow axis of the 2nd pattern optically anisotropic layer 18b. It is an example of the schematic sectional drawing of the 4th embodiment of the circularly-polarizing plate of this invention.
  • Re ( ⁇ ) and Rth ( ⁇ ) represent in-plane retardation at wavelength ⁇ and retardation in the thickness direction, respectively.
  • Re ( ⁇ ), Rth ( ⁇ ), and ⁇ nd are measured by AXOSCAN (manufactured by AXOMETRICS).
  • visible light means 380 nm to 780 nm.
  • a measurement wavelength is 550 nm.
  • the angle relationship (for example, “orthogonal”, “parallel”, etc.) includes a range of errors allowed in the technical field to which the present invention belongs. Specifically, it means that the angle is within a range of strict angle ⁇ 10 °, and an error from the strict angle is preferably 5 ° or less, and more preferably 3 ° or less.
  • a multilayer optically anisotropic layer having a patterned optically anisotropic layer containing a twisted liquid crystal compound is used as the patterned optically anisotropic layer.
  • ⁇ nd of the first pattern optical anisotropic layer, the twist angle of the liquid crystal compound, and the in-plane slow axis that has a predetermined relationship with the in-plane slow axis of the first pattern optical anisotropic layer.
  • the second patterned optically anisotropic layer By controlling the retardation of the second patterned optically anisotropic layer, it is possible to realize a broadband pattern retardation plate that can convert linearly polarized light with a wider wavelength into more complete circularly polarized light than known retardation plates. As a result, tinting when the face is inclined is suppressed.
  • a first optical anisotropy layer is formed on the alignment film, and then the first layer is formed.
  • An alignment film is formed again on the optical anisotropic layer, and then a second optical anisotropic layer is formed on the alignment film. That is, the alignment film needs to be prepared twice.
  • the liquid crystal compound in one optically anisotropic layer is twisted and oriented, so that the step of providing the orientation film can be performed once.
  • a first pattern optical anisotropic layer containing a liquid crystal compound that twist-aligns on the alignment film an in-plane slow axis on the exposed surface of the first pattern optical anisotropic layer
  • it is in a state rotated by a predetermined angle from the in-plane slow axis on the surface on the side where the alignment film is present.
  • the exposure having a predetermined angle relationship with the in-plane slow axis on the surface on the side where the alignment film of the first pattern optical anisotropic layer is present Since the liquid crystal compound is aligned along the in-plane slow axis of the surface, it is possible to save the trouble of providing a separate alignment film.
  • the retardation film 10a has at least a patterned optical anisotropic layer 14a.
  • the patterned optically anisotropic layer 14a has a structure in which the first retardation regions 20a and the second retardation regions 22a are alternately arranged in a stripe pattern in order.
  • the retardation plate 10a may include a transparent support described later.
  • the patterned optical anisotropic layer 14a is a layer formed by laminating the first patterned optical anisotropic layer 16a and the second patterned optical anisotropic layer 18a, and is formed on the first patterned optical anisotropic layer 16a. Includes a twist-aligned liquid crystal compound having a thickness direction as a helical axis. As shown in FIG. 1, the first retardation region 20a and the second retardation region 22a are intended to cover the entire area in the thickness direction of the patterned optical anisotropic layer 14a.
  • the first retardation region of the patterned optically anisotropic layer 16a means the region 24a in FIG.
  • the first retardation region of the second patterned optically anisotropic layer 18a means the region 26a in FIG.
  • the second retardation region of the first pattern optical anisotropic layer 16a means the region 28a in FIG. 1
  • the second retardation region of the second pattern optical anisotropic layer 18a in FIG. It means the region 30a.
  • the patterned optically anisotropic layer 14a includes a first retardation region 20a and a second retardation region 22a whose in-plane slow axis directions are different from each other, and the first retardation region 20a and the second retardation region 22a are They are arranged alternately in the plane.
  • FIG. 1 shows a mode in which the first phase difference region 20a and the second phase difference region 22a are arranged in a stripe shape, the present invention is not limited to this mode.
  • the patterned optical anisotropic layer 14a includes a first patterned optical anisotropic layer 16a and a second patterned optical anisotropic layer 18a.
  • FIG. 2 is a partially enlarged perspective sectional view of the first retardation region 20a and the second retardation region 22a in the patterned optical anisotropic layer 14a. Arrows in the patterned optically anisotropic layer 16a represent in-plane slow axes in the respective layers.
  • the second pattern optical anisotropic layer 18a will be described in detail below, and then the first pattern optical anisotropic layer 16a will be described in detail.
  • the second pattern optical anisotropic layer 18a is a layer containing a liquid crystal compound that is homogeneously aligned in the first retardation region and the second retardation region.
  • the homogeneous alignment refers to an alignment state in which the liquid crystal compound is parallel to a certain direction.
  • FIG. 1 shows an embodiment in which the second pattern optical anisotropic layer 18a includes a homogeneously aligned liquid crystal compound, but the in-plane slow axis of the second pattern optical anisotropic layer 18a is different from the first pattern optical anisotropic layer 18a.
  • the isotropic layer 16a may be made of other materials. For example, you may form from the polymer film (especially the polymer film to which the extending
  • the in-plane slow axis of the first retardation region (region 26a) of the second patterned optical anisotropic layer 18a and the in-plane retardation of the second retardation region (region 30a) of the second patterned optical anisotropic layer 18a It is orthogonal to the phase axis. The definition of orthogonal is as described above.
  • ReB (550) which is the retardation value (in-plane retardation) of the second patterned optically anisotropic layer 18a measured at a wavelength of 550 nm satisfies the following formula (2).
  • the retardation values in the first retardation region (region 26a) and the second retardation region (region 30a) of the second patterned optically anisotropic layer 18a both satisfy the following formula (2).
  • Formula (2) 151 nm ⁇ ReB (550) ⁇ 211 nm Among them, in terms of less tinting when the retardation plate of the present invention is bonded to a display device as a circularly polarizing plate (hereinafter, also simply referred to as “the point where the effect of the present invention is more excellent”), the formula ( 2A) is preferably satisfied, and it is more preferable that the formula (2B) is satisfied.
  • the measuring method of the retardation value of the 2nd pattern optically anisotropic layer 18a is measured using the analysis software of the company using the Axoscan (polarimeter) apparatus of Axometrics.
  • the first pattern optically anisotropic layer 16a includes a twisted liquid crystal compound having a thickness direction as a helical axis.
  • the first patterned optically anisotropic layer 16a preferably exhibits a chiral nematic phase having a so-called spiral structure, a cholesteric phase, or the like.
  • the liquid crystal compound will be described in detail later.
  • As the liquid crystal compound used in the first pattern optical anisotropic layer 16a a liquid crystal compound exhibiting a nematic liquid crystal phase is preferably used.
  • the first pattern optical anisotropic layer 16a has a first retardation region and a second retardation region, similar to the second pattern optical anisotropic layer 18a described above, and the liquid crystal compound contained in each region.
  • the twist direction of the same is the same direction. More specifically, as shown in FIG. 2B, in the first retardation region (region 24a) of the first pattern optical anisotropic layer 16a, the surface 161a on the second pattern optical anisotropic layer 18a side. And the in-plane slow axis on the surface 162a opposite to the second patterned optically anisotropic layer 18a form a predetermined twist angle ⁇ a to be described later.
  • the in-plane slow axis rotates by a predetermined angle in the first retardation region (region 24a) of the first patterned optically anisotropic layer 16a, and the twist direction of the liquid crystal compound as shown by the arrow in FIG. Indicates clockwise rotation (right twist).
  • the second retardation region (region 28a) of the first pattern optical anisotropic layer 16a as shown in FIG. 2C, the surface at the surface 161a on the second pattern optical anisotropic layer 18a side.
  • the inner slow axis and the in-plane slow axis on the surface 162a opposite to the second pattern optical anisotropic layer 18a side form a predetermined twist angle ⁇ a described later. As shown by the arrow in FIG.
  • the twist direction of the liquid crystal compound shows clockwise rotation (right twist). Note that the twist direction is observed from the white arrow in FIG. 2A, and the right direction is based on the in-plane slow axis on the front surface (surface 161a) in the first pattern optical anisotropic layer 16a. Judge the twist or the left twist.
  • FIG. 2 the mode in which the twist direction of the liquid crystal compound is clockwise is described, but the present invention is not limited to this mode, and may be counterclockwise (left-handed).
  • the twist angle ⁇ a of the liquid crystal compound (twist angle in the alignment direction of the liquid crystal compound) is 81 ⁇ 10 °, and 81 ⁇ 8 ° is more preferable, and 81 ⁇ 6 ° is more preferable from the viewpoint that the effect of the present invention is more excellent.
  • the twist angle is less than 71 ° and exceeds 91 °, the tint when the retardation plate of the present invention is bonded to a display device as a circularly polarizing plate is large.
  • the measuring method of a twist angle uses the Axoscan (polarimeter) apparatus of Axometrics, and measures using the apparatus analysis software of the company.
  • the twisted orientation of the liquid crystal compound means that the liquid crystal compound from one main surface to the other main surface of the first pattern optical anisotropic layer 16a with the thickness direction of the first pattern optical anisotropic layer 16a as an axis. Intended to twist. Accordingly, the alignment direction (in-plane slow axis direction) of the liquid crystal compound varies depending on the position of the first pattern optical anisotropic layer 16a in the thickness direction.
  • the value ⁇ nd of the product ⁇ nd of the refractive index anisotropy ⁇ n of the first pattern optical anisotropic layer 16a and the thickness d of the first pattern optical anisotropic layer 16a measured at a wavelength of 550 nm satisfies the following formula (1). That is, the value of the product ⁇ nd with the thickness d in the first retardation region (region 24a) and the second retardation region (region 28a) of the first patterned optically anisotropic layer 16a is the following equation (1). Meet.
  • Formula (1) 142 nm ⁇ ⁇ nd ⁇ 202 nm Especially, it is preferable to satisfy
  • Formula (1A) 152 nm ⁇ ⁇ nd ⁇ 192 nm
  • ⁇ nd is less than 142 nm and more than 202 nm
  • the refractive index anisotropy ⁇ n means the refractive index anisotropy of the optically anisotropic layer.
  • the method for measuring ⁇ nd is the same as the method for measuring the torsion angle, using an Axoscan (polarimeter) device manufactured by Axometrics and using the device analysis software of the company.
  • the in-plane slow axis of the surface 161a on the second pattern optical anisotropic layer 18a side of the first pattern optical anisotropic layer 16a is parallel to the in-plane slow axis of the second pattern optical anisotropic layer 18a. Placed in. Note that the above relationship is satisfied in each of the first phase difference region and the second phase difference region. More specifically, the in-plane slow axis at the surface 161a in the first retardation region (region 24a) of the first pattern optical anisotropic layer 16a and the first position of the second pattern optical anisotropic layer 18a.
  • the in-plane slow phase at the surface 161a in the second retardation region (region 28a) of the first pattern optical anisotropic layer 16a is arranged in parallel with the in-plane slow axis in the retardation region (region 26a).
  • the axis and the in-plane slow axis in the second retardation region (region 30a) of the second patterned optically anisotropic layer 18a are arranged in parallel.
  • An alignment film described later may be disposed between the first pattern optical anisotropic layer 16a and the second pattern optical anisotropic layer 18a, but as shown in FIG.
  • the anisotropic layer 16a and the second patterned optical anisotropic layer 18a are adjacent to each other, and an alignment film is substantially formed between the first patterned optical anisotropic layer 16a and the second patterned optical anisotropic layer 18a. It is preferable not to have it.
  • a covalent bond between compounds contained in each optical anisotropic layer is used. Because it can, it is more excellent in adhesion.
  • the first pattern optical anisotropic layer 16a includes the twisted liquid crystal compound, a desired retardation plate can be obtained without performing the rubbing treatment. More specifically, after forming the first pattern optical anisotropic layer 16a, when forming the second pattern optical anisotropic layer 18a using a liquid crystal compound thereon, the first pattern optical anisotropic layer The direction of the in-plane slow axis on the surface 162a and the surface 161a of 16a is changed. If a liquid crystal compound is applied on the surface 161a without rubbing, the liquid crystal compound is aligned along the alignment state of the surface 161a. Can be oriented to obtain a desired retardation plate.
  • substantially no alignment film means that a film formed only for functioning as an alignment film is not included. Even if the surface of the lower layer contributes to the alignment of the liquid crystal compound of the upper layer, as long as the lower layer is not formed only for use as an alignment film, this Included in the invention.
  • the type of the liquid crystal compound used for forming the first pattern optical anisotropic layer 16a or the second pattern optical anisotropic layer 18a is not particularly limited.
  • an optically anisotropic layer obtained by forming a low-molecular liquid crystal compound in a nematic alignment in a liquid crystal state and then fixing by photocrosslinking or thermal cross-linking, or a polymer liquid crystal compound in a nematic alignment in a liquid crystal state and then cooling Accordingly, an optically anisotropic layer obtained by fixing the orientation can also be used.
  • liquid crystal compounds can be classified into a rod-shaped type (bar-shaped liquid crystal compound) and a disk-shaped type (discotic liquid crystal compound) based on their shapes.
  • Polymer generally refers to a polymer having a degree of polymerization of 100 or more (Polymer Physics / Phase Transition Dynamics, Masao Doi, 2 pages, Iwanami Shoten, 1992).
  • any liquid crystal compound can be used, but a rod-like liquid crystal compound or a discotic liquid crystal compound is preferably used.
  • Two or more kinds of rod-like liquid crystal compounds, two or more kinds of discotic liquid crystal compounds, or a mixture of a rod-like liquid crystal compound and a discotic liquid crystal compound may be used.
  • rod-like liquid crystal compound for example, those described in claim 1 of JP-A No. 11-53019 and paragraphs [0026] to [0098] of JP-A-2005-289980 can be preferably used.
  • discotic liquid crystal compound for example, those described in paragraphs [0020] to [0067] of JP-A-2007-108732 and paragraphs [0013] to [0108] of JP-A-2010-244038 are preferably used. However, it is not limited to these.
  • the first pattern optical anisotropic layer 16a or the second pattern optical anisotropic layer 18a can be formed by using a rod-like liquid crystal compound or a discotic liquid crystal compound having a polymerizable group, since the temperature change and the humidity change can be reduced. Is more preferable.
  • the liquid crystal compound may be a mixture of two or more types, and in that case, at least one preferably has two or more polymerizable groups. That is, the first pattern optical anisotropic layer 16a or the second pattern optical anisotropic layer 18a is a layer formed by fixing a rod-like liquid crystal compound having a polymerizable group or a discotic liquid crystal compound by polymerization or the like.
  • the kind of the polymerizable group contained in the discotic liquid crystal compound and the rod-like liquid crystal compound is not particularly limited, and a functional group capable of addition polymerization reaction is preferable, and a polymerizable ethylenically unsaturated group or a ring polymerizable group is preferable. More specifically, a (meth) acryloyl group, a vinyl group, a styryl group, an allyl group, etc. are mentioned preferably, and a (meth) acryloyl group is more preferable.
  • Examples of the method for forming the patterned optically anisotropic layer 14a include the following preferred embodiments, but are not limited thereto, and various known methods (for example, first pattern optics including a liquid crystal compound) And a method using a composition for forming an anisotropic layer and a composition for forming a second pattern optically anisotropic layer).
  • the first preferred embodiment uses a plurality of actions for controlling the alignment of the liquid crystal compound, and then eliminates any action by an external stimulus (such as heat treatment) to make the predetermined alignment control action dominant. It is.
  • the liquid crystal compound is brought into a predetermined alignment state by a combined action of the alignment control ability by the alignment film and the alignment control ability of the alignment controller added to the liquid crystal compound, and then fixed.
  • one of the actions for example, the action by the alignment control agent
  • the other orientation control action the action by the alignment film
  • the second preferred embodiment is an embodiment using a pattern alignment film.
  • pattern alignment films having different alignment control capabilities are formed, a liquid crystal compound is disposed thereon, and the liquid crystal compound is aligned.
  • the liquid crystal compounds achieve different alignment states depending on the alignment control ability of the pattern alignment film.
  • the pattern alignment film can be formed using a printing method, mask rubbing for the rubbing alignment film, mask exposure for the photo alignment film, or the like.
  • a method using a printing method is preferable in that large-scale equipment is not required and manufacturing is easy. Details of this method are described in paragraphs [0166] to [0181] of JP2012-032661A, the contents of which are incorporated herein by reference.
  • a photo acid generator is added to the alignment film.
  • a photoacid generator is added to the alignment film, and pattern exposure exposes a region where the photoacid generator is decomposed to generate an acidic compound and a region where no acid compound is generated.
  • the photoacid generator remains almost undecomposed, and the interaction between the alignment film material, the liquid crystal compound, and the alignment control agent added as necessary dominates the alignment state,
  • the slow axis is oriented in a direction perpendicular to the rubbing direction.
  • the alignment film When the alignment film is irradiated with light and an acidic compound is generated, the interaction is no longer dominant, the rubbing direction of the rubbing alignment film dominates the alignment state, and the liquid crystal compound has its slow axis parallel to the rubbing direction. To parallel orientation.
  • a water-soluble compound is preferably used. Examples of photoacid generators that can be used include Prog. Polym. Sci. , Vol. 23, p. 1485 (1998).
  • the photoacid generator pyridinium salts, iodonium salts and sulfonium salts are particularly preferably used. Details of this method are described in Japanese Patent Application No. 2010-289360, the contents of which are incorporated herein by reference.
  • the aligned (preferably vertically aligned) liquid crystal compound is preferably fixed while maintaining the alignment state.
  • the immobilization is preferably carried out by a polymerization reaction of a polymerizable group introduced into the liquid crystal compound using a polymerization initiator.
  • the polymerization reaction includes a thermal polymerization reaction using a thermal polymerization initiator and a photopolymerization reaction using a photopolymerization initiator.
  • a photopolymerization reaction is preferred.
  • the amount of the polymerization initiator used is 0.01 to 20% by mass of the solid content of the composition (the first pattern optical anisotropic layer forming composition or the second pattern optical anisotropic layer forming composition). It is preferably 0.5 to 5% by mass.
  • a chiral agent When forming the first pattern optically anisotropic layer 16a, a chiral agent may be used as desired together with the liquid crystal compound as necessary.
  • the chiral agent is added to twist and align the liquid crystal compound, but of course, the addition of the chiral agent is not necessary when the liquid crystal compound is a compound exhibiting optical activity such as having an asymmetric carbon in the molecule. is there. Further, depending on the production method and the twist angle, it is not necessary to add a chiral agent.
  • the chiral agent is not particularly limited as long as it is compatible with the liquid crystal compound used in combination.
  • a chiral agent generally contains an asymmetric carbon atom, but an axially asymmetric compound or a planar asymmetric compound containing no asymmetric carbon atom can also be used as the chiral agent.
  • the axial asymmetric compound or the planar asymmetric compound include binaphthyl, helicene, paracyclophane, and derivatives thereof.
  • the chiral agent may have liquid crystallinity.
  • a plasticizer for optically anisotropic layer
  • a surfactant for optically anisotropic layer
  • a polymerizable monomer for optically anisotropic layer
  • these materials are preferably compatible with the liquid crystal compound and do not inhibit the alignment.
  • additive alignment control agent
  • Various known additives can be used as the additive.
  • the polymerizable monomer examples include radically polymerizable or cationically polymerizable compounds.
  • it is a polyfunctional radically polymerizable monomer and is preferably copolymerizable with the above-described polymerizable group-containing liquid crystal compound. Examples thereof include those described in paragraph numbers [0018] to [0020] in JP-A No. 2002-296423.
  • the amount of the compound added is generally in the range of 1 to 50% by mass and preferably in the range of 5 to 30% by mass with respect to the liquid crystal molecules.
  • surfactant examples include conventionally known compounds, and fluorine compounds are particularly preferable. Specifically, for example, compounds described in paragraphs [0028] to [0056] in JP-A-2001-330725, and paragraphs [0069] to [0126] in Japanese Patent Application No. 2003-295212 are described. The compound of this is mentioned.
  • the polymer used with the liquid crystal compound is preferably capable of thickening the coating solution.
  • a cellulose ester can be mentioned as an example of a polymer. Preferable examples of the cellulose ester include those described in paragraph [0178] of JP-A No. 2000-155216.
  • the amount of the polymer added is preferably in the range of 0.1 to 10% by mass, and preferably in the range of 0.1 to 8% by mass with respect to the liquid crystal molecules so as not to disturb the alignment of the liquid crystal compound. Is more preferable.
  • the discotic nematic liquid crystal phase-solid phase transition temperature of the liquid crystal compound is preferably 70 to 300 ° C, and more preferably 70 to 170 ° C.
  • an organic solvent is preferably used as the solvent used for the preparation of the composition (the first pattern optical anisotropic layer forming composition or the second pattern optical anisotropic layer forming composition).
  • organic solvents include amides (eg N, N-dimethylformamide), sulfoxides (eg dimethyl sulfoxide), heterocyclic compounds (eg pyridine), hydrocarbons (eg benzene, hexane), alkyl halides (eg , Chloroform, dichloromethane), esters (eg, methyl acetate, ethyl acetate, butyl acetate), ketones (eg, acetone, methyl ethyl ketone), ethers (eg, tetrahydrofuran, 1,2-dimethoxyethane). Alkyl halides and ketones are preferred. Two or more organic solvents may be used in combination.
  • the first pattern optical anisotropic layer forming composition or the second pattern optical anisotropic layer forming composition is applied to the surface of the alignment film, and a liquid crystal compound (for example, a discotic liquid crystal compound) is applied.
  • a liquid crystal compound for example, a discotic liquid crystal compound
  • the molecules may be oriented. Since the alignment film has a function of defining the alignment direction of the liquid crystal compound, it is preferably used for realizing a preferred embodiment of the present invention. However, if the alignment state is fixed after the alignment of the liquid crystal compound, the alignment film plays the role and is not necessarily an essential component of the present invention.
  • the alignment film is an organic compound (eg, ⁇ -tricosanoic acid) formed by rubbing treatment of an organic compound (preferably polymer), oblique deposition of an inorganic compound, formation of a layer having a microgroove, or Langmuir-Blodgett method (LB film). , Dioctadecylmethylammonium chloride, methyl stearylate). Furthermore, an alignment film in which an alignment function is generated by application of an electric field, application of a magnetic field, or light irradiation (preferably polarized light) is also known. The alignment film is preferably formed by polymer rubbing treatment.
  • an organic compound eg, ⁇ -tricosanoic acid
  • LB film Langmuir-Blodgett method
  • polymer examples include, for example, methacrylate copolymers, styrene copolymers, polyolefins, polyvinyl alcohols and modified polyvinyl alcohols described in paragraph No. [0022] of JP-A-8-338913, poly (N— Methylolacrylamide), polyester, polyimide, vinyl acetate copolymer, carboxymethylcellulose, polycarbonate and the like. Silane coupling agents can be used as the polymer.
  • Water-soluble polymers eg, poly (N-methylolacrylamide), carboxymethylcellulose, gelatin, polyvinyl alcohol, modified polyvinyl alcohol
  • gelatin, polyvinyl alcohol and modified polyvinyl alcohol are more preferred, and polyvinyl alcohol and modified polyvinyl alcohol are most preferred.
  • the alignment film is basically formed by applying a solution containing the polymer as an alignment film forming material and an optional additive (for example, a crosslinking agent) on a transparent support, followed by drying by heating (crosslinking), and rubbing treatment.
  • a solution containing the polymer as an alignment film forming material and an optional additive for example, a crosslinking agent
  • a crosslinking agent for example, a crosslinking agent
  • rubbing treatment a treatment method widely adopted as a liquid crystal alignment treatment process of the LCD can be applied. That is, a method of obtaining the orientation by rubbing the surface of the orientation film in a certain direction using paper, gauze, felt, rubber, nylon, polyester fiber or the like can be used. Generally, it is carried out by rubbing several times using a cloth or the like in which fibers having a uniform length and thickness are planted on average.
  • FIG. 3 shows a schematic cross-sectional view of the second embodiment of the retardation plate of the present invention.
  • the retardation plate 10b has a patterned optical anisotropic layer 14b.
  • the patterned optical anisotropic layer 14b has a structure in which the first retardation regions 20b and the second retardation regions 22b are alternately arranged in a stripe pattern in order.
  • the retardation plate 10b may include a transparent support described later.
  • the patterned optical anisotropic layer 14b is a layer formed by laminating the first patterned optical anisotropic layer 16b and the second patterned optical anisotropic layer 18b.
  • the retardation plate 10b is composed of two patterned optically anisotropic layers as in the retardation plate 10a, but differs in respect of the retardation of the patterned optically anisotropic layer and the twist angle of the liquid crystal compound.
  • each of the first retardation region 20b and the second retardation region 22b is a region extending over the entire thickness direction of the patterned optically anisotropic layer 14b.
  • the first retardation region of the patterned optically anisotropic layer 16b means the region 24b in FIG. 1
  • the first retardation region of the second patterned optically anisotropic layer 18b means the region 26b in FIG.
  • the second retardation region of the first pattern optical anisotropic layer 16b means the region 28b in FIG. 1, and the second retardation region of the second pattern optical anisotropic layer 18b means the region in FIG. It means the region 30b.
  • the structure different from the pattern optical anisotropic layer 14a of the pattern optical anisotropic layer 14b is mainly explained in full detail.
  • the patterned optically anisotropic layer 14b includes a first retardation region 20b and a second retardation region 22b having different in-plane slow axis directions, and the first retardation region 20b and the second retardation region 22b They are arranged alternately in the plane.
  • FIG. 3 shows a mode in which the first phase difference region 20b and the second phase difference region 22b are arranged in a stripe shape, the present invention is not limited to this mode.
  • the patterned optical anisotropic layer 14b includes a first patterned optical anisotropic layer 16b and a second patterned optical anisotropic layer 18b.
  • FIG. 4 is a partially enlarged perspective cross-sectional view of the first retardation region 20b and the second retardation region 22b in the patterned optical anisotropic layer 14b, and shows the second patterned optical anisotropic layer 18b and the first optical retardation layer 18b.
  • Arrows in the patterned optically anisotropic layer 16b represent in-plane slow axes in the respective layers.
  • the second pattern optical anisotropic layer 18b will be described in detail below, and then the first pattern optical anisotropic layer 16b will be described in detail.
  • the second pattern optical anisotropic layer 18b is a layer containing a liquid crystal compound that is homogeneously aligned in the first retardation region and the second retardation region.
  • the homogeneous alignment refers to an alignment state in which the liquid crystal compound is parallel to a certain direction.
  • FIG. 3 shows an embodiment in which the second pattern optical anisotropic layer 18b includes a homogeneously aligned liquid crystal compound, but the in-plane slow axis of the second pattern optical anisotropic layer 18b is the first pattern optical anisotropic layer.
  • the isotropic layer 16b may be made of other materials. For example, you may form from the polymer film (especially the polymer film to which the extending
  • ReB (550) which is the retardation value (in-plane retardation) of the second patterned optically anisotropic layer 18b measured at a wavelength of 550 nm satisfies the following formula (4). That is, the retardation values in the first retardation region (region 26b) and the second retardation region (region 30b) of the second patterned optically anisotropic layer 18b both satisfy the following formula (4).
  • Formula (4) 158 nm ⁇ ReB (550) ⁇ 218 nm Especially, it is preferable to satisfy
  • Formula (4A) 168 nm ⁇ ReB (550) ⁇ 208 nm
  • Formula (4B) 178 nm ⁇ ReB (550) ⁇ 198 nm
  • ReB (550) is less than 158 nm and more than 218 nm
  • the tint when the face is inclined when the retardation plate of the present invention is bonded to a display device as a circularly polarizing plate is large.
  • the measuring method of the retardation value of the 2nd pattern optically anisotropic layer 18b is measured using the Axoscan (polarimeter) apparatus of Axometrics, and the analysis software of the company.
  • the first patterned optically anisotropic layer 16b includes a liquid crystal compound that is twisted and oriented with the thickness direction as a helical axis.
  • the preferred embodiment of the liquid crystal compound is as described above.
  • the first pattern optical anisotropic layer 16b includes a first retardation region and a second retardation region, and a liquid crystal compound contained in each region.
  • the twist directions of the same are the same. More specifically, as shown in FIG. 4B, the first phase difference region (region 24b) of the first pattern optical anisotropic layer 16b is opposite to the second pattern optical anisotropic layer 18b side.
  • the in-plane slow axis on the surface 161b on the side and the in-plane slow axis on the surface 162b on the second pattern optical anisotropic layer 18a side form a predetermined twist angle ⁇ b described later.
  • the in-plane slow axis rotates by a predetermined angle in the first retardation region (region 24b) of the first patterned optically anisotropic layer 16b, and the twist direction of the liquid crystal compound as shown by the arrow in FIG. Indicates clockwise rotation (right twist).
  • the second retardation region (region 28b) of the first pattern optical anisotropic layer 16b as shown in FIG. 4C, the surface opposite to the second pattern optical anisotropic layer 18b side.
  • the in-plane slow axis at 161b and the in-plane slow axis at the surface 162b on the second pattern optically anisotropic layer 18b side form a predetermined twist angle ⁇ b described later.
  • the twist direction of a liquid crystal compound shows clockwise rotation (right twist).
  • the twist direction is observed from the white arrow in FIG. 4A and is based on the in-plane slow axis on the near surface (surface 161b) in the first pattern optical anisotropic layer 16b. Judge the twist or the left twist.
  • FIG. 4 the mode in which the twist direction of the liquid crystal compound is clockwise is described, but the present invention is not limited to this mode, and may be counterclockwise (left-handed).
  • the twist angle ⁇ b (twist angle in the alignment direction of the liquid crystal compound) of the liquid crystal compound is 59 ⁇ 10 °, and 59 ⁇ 8 ° is more preferable, and 59 ⁇ 6 ° is more preferable from the viewpoint that the effect of the present invention is more excellent.
  • the twist angle is less than 49 ° or more than 69 °, the tint when the face is inclined when the retardation plate of the present invention is bonded to a display device as a circularly polarizing plate is large.
  • the measuring method of a twist angle uses the Axoscan (polarimeter) apparatus of Axometrics, and measures using the apparatus analysis software of the company.
  • the value of the product ⁇ nd of the refractive index anisotropy ⁇ n of the first pattern optical anisotropic layer 16b and the thickness d of the first pattern optical anisotropic layer 16b measured at a wavelength of 550 nm satisfies the following formula (3). That is, the value of the product ⁇ nd with the thickness d in the first retardation region (region 24b) and the second retardation region (region 28b) of the first patterned optically anisotropic layer 16b is the following equation (3).
  • Expression (3) 203 nm ⁇ ⁇ nd ⁇ 263 nm Especially, it is preferable to satisfy
  • Formula (3A) 213 nm ⁇ ⁇ nd ⁇ 253 nm
  • Formula (3B) 223 nm ⁇ ⁇ nd ⁇ 243 nm
  • ⁇ nd is less than 203 nm and more than 263 nm
  • the refractive index anisotropy ⁇ n means the refractive index anisotropy of the optically anisotropic layer.
  • the method for measuring ⁇ nd is the same as the method for measuring the torsion angle, using an Axoscan (polarimeter) device manufactured by Axometrics and using the device analysis software of the company.
  • the in-plane slow axis on the surface 162b of the first pattern optical anisotropic layer 16b and the in-plane slow axis of the second pattern optical anisotropic layer 18b are arranged orthogonally. Note that the above relationship is satisfied in each of the first phase difference region and the second phase difference region. More specifically, the in-plane slow axis at the surface 162b in the first retardation region (region 24b) of the first patterned optically anisotropic layer 16b and the first of the second patterned optically anisotropic layer 18b.
  • An alignment film described later may be disposed between the first patterned optically anisotropic layer 16b and the second patterned optically anisotropic layer 18b, but as in the case of the retardation plate 10a,
  • the first pattern optical anisotropic layer 16b and the second pattern optical anisotropic layer 18b are adjacent to each other, and substantially between the first pattern optical anisotropic layer 16b and the second pattern optical anisotropic layer 18b. It is preferable not to have an alignment film.
  • a covalent bond between the compounds contained in each optical anisotropic layer is used. Because it can, it is more excellent in adhesion.
  • the materials constituting the first pattern optical anisotropic layer 16b and the second pattern optical anisotropic layer 18b are the same as the first pattern optical anisotropic layer 16a and the second pattern optical anisotropic layer 18a described above.
  • the material which comprises is illustrated.
  • the method for producing the first pattern optical anisotropic layer 16b and the second pattern optical anisotropic layer 18b is not particularly limited, and the first pattern optical anisotropic layer 16a and the second pattern optical anisotropic layer described above are used.
  • the manufacturing method of 18a is illustrated.
  • the circularly polarizing plate of the present invention includes at least the above-mentioned retardation plate (first embodiment and second embodiment) and a polarizing film. Moreover, the transparent support body may be included as needed.
  • the circularly polarizing plate of the present invention having the above configuration can be used for various applications in addition to being used as a polarizing plate for 3D image display devices. For example, it can be used as an adjusting light system by using two optical films. In particular, it is preferably used as a window adjustment system.
  • the polarizing film may be a member having a function of converting natural light into specific linearly polarized light, and an absorptive polarizer can be used.
  • the type of the polarizing film is not particularly limited, and a commonly used polarizing film can be used.
  • any of an iodine-based polarizing film, a dye-based polarizing film using a dichroic dye, and a polyene-based polarizing film Can also be used.
  • the iodine-based polarizing film and the dye-based polarizing film are generally produced by adsorbing iodine or a dichroic dye to polyvinyl alcohol and stretching it.
  • a polarizing film is used as a polarizing plate by which the protective film was bonded on both surfaces.
  • the manufacturing method of the circularly polarizing plate is not particularly limited, but it is preferable that the method includes, for example, a step in which the retardation plate and the polarizing film are continuously laminated in a long state.
  • the long polarizing plate is cut according to the size of the screen of the image display device used.
  • a transparent support is a base material which supports the pattern optically anisotropic layer mentioned above. In the case where the patterned optically anisotropic layer itself has sufficient self-supporting property, the transparent support may not be provided. That is, the transparent support is an arbitrary constituent member.
  • the retardation value in the thickness direction (Rth (550)) at 550 nm of the transparent support is not particularly limited, but is preferably ⁇ 110 to 110 nm, more preferably ⁇ 80 to 80 nm, from the viewpoint of more excellent effects of the present invention.
  • the in-plane retardation value (Re (550)) at 550 nm of the transparent support is not particularly limited, but is preferably 0 to 50 nm, more preferably 0 to 30 nm, and further preferably 0 to 10 nm. preferable.
  • the above range is preferable because light leakage of reflected light can be reduced to a level where it is not visually recognized.
  • the transparent support As a material for forming the transparent support, a polymer excellent in optical performance transparency, mechanical strength, thermal stability, moisture shielding property, isotropy and the like is preferable.
  • the term “transparent” means that the visible light transmittance is 60% or more, preferably 80% or more, and particularly preferably 90% or more.
  • the polymer film that can be used as the transparent support 12 include a cellulose acylate film (for example, a cellulose triacetate film (refractive index: 1.48), a cellulose diacetate film, a cellulose acetate butyrate film, and a cellulose acetate propionate.
  • polyolefins such as polyethylene and polypropylene
  • polyester resin films such as polyethylene terephthalate and polyethylene naphthalate
  • polyethersulfone films polyacrylic resin films such as polymethyl methacrylate, polyurethane resin films, polyester films, polycarbonate films
  • Polysulfone film, polyether film, polymethylpentene film, polyether ketone film Rum (meth) acrylonitrile film
  • polymer film having alicyclic structure nonorbornene resin (Arton: trade name, manufactured by JSR Corporation, amorphous polyolefin (ZEONEX: trade name, manufactured by ZEON Corporation)
  • a material for the polymer film triacetyl cellulose, polyethylene terephthalate, or a polymer having an alicyclic structure is preferable, and triacetyl cellulose is particularly preferable.
  • the thickness of the transparent support is not particularly limited, but is preferably about 10 ⁇ m to 200 ⁇ m, more preferably 10 ⁇ m to 100 ⁇ m, and even more preferably 20 ⁇ m to 90 ⁇ m.
  • the transparent support 12 may be composed of a plurality of laminated layers. A thinner one is preferable for suppressing external light reflection, but if it is thinner than 10 ⁇ m, the strength of the film tends to be weak, which tends to be undesirable.
  • the transparent support 12 is subjected to a surface treatment (eg, glow discharge treatment, corona discharge treatment, ultraviolet (UV) treatment, flame treatment). Also good.
  • additives for example, an optical anisotropy adjusting agent, a wavelength dispersion adjusting agent, fine particles, a plasticizer, an ultraviolet ray preventing agent, a deterioration preventing agent, a release agent, etc.
  • the transparent support is a cellulose acylate film
  • the addition time may be any in the dope preparation step (preparation step of the cellulose acylate solution), but an additive is added and prepared at the end of the dope preparation step. You may perform a process.
  • the relationship between the absorption axis of the polarizing film 32 and the in-plane slow axes of the first pattern optical anisotropic layer 16a and the second pattern optical anisotropic layer 18a When the plate (the first pattern optical anisotropic layer 16a and the second pattern optical anisotropic layer 18a) is observed and the counterclockwise direction is expressed by a positive angle value, the following requirements (a) or (b) are satisfied. Fulfill.
  • the twist angle of the liquid crystal compound in the first pattern optical anisotropic layer 16a is 81 ⁇ 10 °.
  • FIG. 6A shows a partially enlarged perspective sectional view of a configuration in which the transparent support 12 is removed from the circularly polarizing plate 100a shown in FIG.
  • the arrows in the polarizing film 32 in FIG. 6A indicate the absorption axis
  • the arrows in the second pattern optical anisotropic layer 18a and the first pattern optical anisotropic layer 16a indicate in-plane slow phases in the respective layers.
  • FIG. 6B the absorption axis of the polarizing film 32 and the second pattern optical anisotropic layer 18a in the first retardation region when observed from the white arrow in FIG. 6A.
  • the relationship of the angle between the in-plane slow axis and the in-plane slow axis of the first patterned optically anisotropic layer 16a is shown.
  • FIG. 6C the absorption axis of the polarizing film 32 and the second pattern optical anisotropic layer 18a in the second retardation region when observed from the white arrow in FIG. 6A.
  • the relationship of the angle between the in-plane slow axis and the in-plane slow axis of the first patterned optically anisotropic layer 16a is shown.
  • the rotation angle of the in-plane slow axis is counterclockwise with respect to the absorption axis of the polarizing film 32 when observed from the white arrow in FIG. 6 (A). Is expressed as a positive value and clockwise as a negative value.
  • the in-plane slow axis in the first retardation region (region 26a) of the second patterned optically anisotropic layer 18a is ⁇ 13 ° (13 clockwise) with respect to the absorption axis of the polarizing film 32. °) In the rotated position. That is, the angle ⁇ 2x formed by the absorption axis of the polarizing film 32 and the in-plane slow axis in the first retardation region (region 26a) of the second pattern optical anisotropic layer 18a is 13 °.
  • FIG. 6 shows an embodiment in which the in-plane slow axis in the first retardation region (region 26a) of the second patterned optically anisotropic layer 18a is at a position of ⁇ 13 °.
  • the present invention is not limited to this embodiment. However, it may be in the range of ⁇ 13 ⁇ 10 °.
  • the in-plane slow axis in the second retardation region (region 30a) of the second patterned optically anisotropic layer 18a is rotated by ⁇ 103 ° (103 ° clockwise) with respect to the absorption axis of the polarizing film 32. In the position. That is, the angle ⁇ 2y formed between the absorption axis of the polarizing film 32 and the in-plane slow axis in the second retardation region (region 30a) of the second pattern optical anisotropic layer 18a is 103 °.
  • the present invention is not limited to this embodiment. However, it may be in the range of ⁇ 103 ⁇ 10 °.
  • the second pattern optical anisotropic layer 18a includes a homogeneously aligned liquid crystal compound. Therefore, the in-plane slow axis on the surface 181a on the polarizing film 32 side of the second pattern optical anisotropic layer 18a and the in-plane slow axis on the surface 182a on the first pattern optical anisotropic layer 16a side are polarized light.
  • the in-plane slow axis on the surface 181a of the second patterned optically anisotropic layer 18a and the in-plane slow axis on the surface 182a are parallel in both the first retardation region and the second retardation region. is there.
  • the in-plane slow axis on the surface 182a of the second pattern optical anisotropic layer 18a and the surface 161a on the second pattern optical anisotropic layer 18a side of the first pattern optical anisotropic layer 16a is parallel to both the first phase difference region and the second phase difference region. That is, in both the first retardation region and the second retardation region, the angle ⁇ 1Ax formed by the absorption axis of the polarizing film 32 and the in-plane slow axis at the surface 161a of the first pattern optical anisotropic layer 16a, and ⁇ 1Ay is substantially the same as ⁇ 2x and ⁇ 2y, respectively.
  • the first pattern optical anisotropic layer 16a includes a twisted liquid crystal compound having the thickness direction as a helical axis. Therefore, as shown in FIG. 6A, in both the first retardation region and the second retardation region, the in-plane slow axis on the surface 161a of the first pattern optical anisotropic layer 16a, The in-plane slow axis on the surface 162a opposite to the second pattern optical anisotropic layer 18a side of the one pattern optical anisotropic layer 16a is the twist angle (in FIG. 6, 81 ° ). That is, the in-plane slow axis of the first pattern optical anisotropic layer 16a rotates by ⁇ 81 ° (81 ° clockwise).
  • the angle ⁇ 1Bx formed by the absorption axis of the polarizing film 32 and the in-plane slow axis at the surface 162a of the first pattern optical anisotropic layer 16a is 94 °
  • the second retardation region The angle ⁇ 1By formed by the absorption axis of the polarizing film 32 and the in-plane slow axis at the surface 162a of the first pattern optical anisotropic layer 16a is 184 °.
  • the in-plane slow axis at the surface 162a of the first pattern optical anisotropic layer 16a is ⁇ 81 with respect to the in-plane slow axis at the surface 161a of the first pattern optical anisotropic layer 16a.
  • a rotated mode is shown, the present invention is not limited to this mode, and the rotation angle may be in the range of ⁇ 81 ⁇ 10 °.
  • FIG. 6 shows a mode in which the in-plane slow axis on the surface 162a of the first patterned optically anisotropic layer 16a is at a position of ⁇ 94 ° in the first retardation region, but the present invention is not limited to this mode. However, it may be in the range of ⁇ 94 ⁇ 20 °.
  • the in-plane slow axis on the surface 162a of the first patterned optically anisotropic layer 16a is at a position of ⁇ 184 °.
  • the present invention is not limited to this mode. It may be in the range of ⁇ 20 °.
  • the in-plane slow axis in the first retardation region of the second pattern optical anisotropic layer 18a is ⁇ 13 ° with respect to the absorption axis of the polarizing film 32.
  • the in-plane slow axis in the second retardation region is at ⁇ 103 °, and the twist direction of the liquid crystal compound in the first pattern optical anisotropic layer 16a is clockwise (right Torsion). Note that the twist direction is observed from the white arrow in FIG. 6A, and the right direction is based on the in-plane slow axis on the front surface (surface 161a) in the first pattern optical anisotropic layer 16a. Judge the twist or the left twist. In FIG.
  • the mode in which the twist direction of the liquid crystal compound in the first pattern optical anisotropic layer 16a is clockwise is described in detail.
  • the in-plane slow axis in the first retardation region of the second patterned optically anisotropic layer 18a is at a position of 13 ° with respect to the absorption axis of the polarizing film 32, and the second The in-plane slow axis in the phase difference region may be at a position of 103 °, and the twist direction of the liquid crystal compound in the first pattern optical anisotropic layer 16a may be counterclockwise (left twist). .
  • This aspect corresponds to requirement (a).
  • a transparent support Rth (550) is preferably ⁇ 10 nm to 10 nm, and ⁇ 5 nm to 5 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to a display device is smaller. It is more preferable that
  • Rth (550) of the transparent support Is preferably ⁇ 90 nm to ⁇ 70 nm, more preferably ⁇ 85 nm to ⁇ 75 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller. Is more preferable.
  • Rth (550) of the transparent support Is preferably 50 nm to 70 nm, and more preferably 55 nm to 65 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller.
  • Rth (550) of the transparent support is From the viewpoint that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to a display device is smaller, it is preferably ⁇ 10 nm to 10 nm, more preferably ⁇ 5 nm to 5 nm. .
  • the transparent support 12 As a second embodiment of the circularly polarizing plate, as shown in FIG. 7, the transparent support 12, the first pattern optical anisotropic layer 16a, the second pattern optical anisotropic layer 18a, and the polarizing film 32 are used.
  • the circularly-polarizing plate 100b which has these in this order is mentioned.
  • the circularly polarizing plate 100b shown in FIG. 7 and the circularly polarizing plate 100a shown in FIG. 5 are the same except for the position of the transparent support 12.
  • the absorption axis of the polarizing film 32 and the in-plane slow axes of the first pattern optical anisotropic layer 16a and the second pattern optical anisotropic layer 18a similarly to the circularly polarizing plate 100a, the absorption axis of the polarizing film 32 and the in-plane slow axes of the first pattern optical anisotropic layer 16a and the second pattern optical anisotropic layer 18a.
  • the relationship satisfies the above requirement (a) or (b).
  • Rth (550) of the transparent support Is preferably 70 nm to 90 nm, more preferably 75 nm to 85 nm, in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to a display device is smaller. .
  • Rth (550) of the transparent support Is preferably 50 nm to 70 nm, and more preferably 55 nm to 65 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller.
  • Rth (550) of the transparent support Is preferably ⁇ 50 nm to ⁇ 30 nm, and preferably ⁇ 45 nm to ⁇ 35 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller. Is more preferable.
  • Rth (550) of the transparent support is From the viewpoint that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller, it is preferably ⁇ 70 nm to ⁇ 50 nm, and preferably ⁇ 65 nm to ⁇ 55 nm. More preferred.
  • the second pattern optical anisotropic layer 18b, the first pattern optical anisotropic layer 16b, the transparent support 12, and the polarizing film 32 are used.
  • the circularly-polarizing plate 100c which has these in this order is mentioned.
  • the relationship between the absorption axis of the polarizing film 32 and the in-plane slow axes of the first patterned optically anisotropic layer 16b and the second patterned optically anisotropic layer 18b is a phase difference from the polarizing film 32.
  • FIG. 9A shows a partially enlarged perspective sectional view of a configuration in which the transparent support 12 is removed from the circularly polarizing plate 100c shown in FIG. 9A, the arrow in the polarizing film 32 indicates the absorption axis, and the arrows in the second pattern optical anisotropic layer 18b and the first pattern optical anisotropic layer 16b indicate in-plane slow phases in the respective layers.
  • FIG. 9B the absorption axis of the polarizing film 32 and the first pattern optical anisotropic layer 16b in the first retardation region when observed from the white arrow in FIG. 9A.
  • the relationship of the angle between the in-plane slow axis and the in-plane slow axis of the second patterned optically anisotropic layer 18b is shown.
  • FIG. 9C the absorption axis of the polarizing film 32 and the first pattern optical anisotropic layer 16b in the second retardation region when observed from the white arrow in FIG. 9A.
  • the relationship of the angle between the in-plane slow axis and the in-plane slow axis of the second patterned optically anisotropic layer 18b is shown.
  • the rotation angle of the in-plane slow axis is counterclockwise based on the absorption axis of the polarizing film 32 when observed from the white arrow in FIG. 9A. Expressed with a positive value in the rotation direction and a negative value in the clockwise direction.
  • the in-plane slow axis at the surface 161b in the first retardation region (region 24b) of the first patterned optically anisotropic layer 16b is 123 ° (reverse to the absorption axis of the polarizing film 32). It is in a position rotated 123 ° clockwise. That is, the angle ⁇ 1Ax formed between the absorption axis of the polarizing film 32 and the in-plane slow axis on the surface 161b on the polarizing film 32 side in the first retardation region (region 24b) of the first pattern optical anisotropic layer 16b is It is 123 °.
  • FIG. 9 shows a mode in which the in-plane slow axis on the surface 161b in the first retardation region (region 24b) of the first patterned optically anisotropic layer 16b is at a position of 123 °. However, it is sufficient if it is in the range of 123 ⁇ 10 °.
  • the in-plane slow axis at the surface 161b in the second retardation region (region 28b) of the first patterned optically anisotropic layer 16b is 33 ° (counterclockwise) with respect to the absorption axis of the polarizing film 32. 33 °) in a rotated position.
  • the angle ⁇ 1Ay formed by the absorption axis of the polarizing film 32 and the in-plane slow axis at the surface 161b on the polarizing film 32 side in the second retardation region (region 28b) of the first pattern optical anisotropic layer 16b is 33 °.
  • FIG. 9 shows a mode in which the in-plane slow axis on the surface 161b in the second retardation region (region 28b) of the first patterned optically anisotropic layer 16b is at a position of 33 °. However, it is sufficient if it is in the range of 33 ⁇ 10 °.
  • the first pattern optical anisotropic layer 16b includes a twist-aligned liquid crystal compound having the thickness direction as a helical axis. Therefore, as shown in FIG. 9A, in-plane retardation at the surface 161b of the first pattern optical anisotropic layer 16b on the polarizing film 32 side in both the first retardation region and the second retardation region.
  • the phase axis and the in-plane slow axis at the surface 162b on the second pattern optical anisotropic layer 18b side of the first pattern optical anisotropic layer 16b are the above-described twist angles (in FIG. °).
  • the in-plane slow axis of the first pattern optical anisotropic layer 16b rotates by ⁇ 59 ° (59 ° clockwise). Accordingly, in the region 24b, the angle ⁇ 1Bx formed by the absorption axis of the polarizing film 32 and the in-plane slow axis on the surface 162b of the first pattern optical anisotropic layer 12b is 64 °, and in the region 28b, the angle of the polarizing film 32 is increased.
  • the angle ⁇ 1By formed by the absorption axis and the in-plane slow axis at the surface 162b of the first pattern optical anisotropic layer 16b is 26 °.
  • the in-plane slow axis at the surface 162b of the first pattern optical anisotropic layer 16b is ⁇ with respect to the in-plane slow axis at the surface 161b of the first pattern optical anisotropic layer 16b.
  • a mode rotated by 59 ° is shown, the present invention is not limited to this mode, and the rotation angle may be in a range of ⁇ 59 ⁇ 10 °.
  • the in-plane slow axis at the surface 162 b of the first patterned optically anisotropic layer 16 b is at a position of 64 ° with respect to the absorption axis of the polarizing film 32 in the first retardation region.
  • the present invention is not limited to this mode and may be in a range of 64 ⁇ 20 °.
  • the in-plane slow axis on the surface 162b of the first patterned optically anisotropic layer 16b is in the position of ⁇ 26 ° with respect to the absorption axis of the polarizing film 32. It is not limited to this embodiment, and it may be in the range of ⁇ 26 ⁇ 20 °.
  • the in-plane slow axis on the surface 162b on the optically anisotropic layer 18b side is orthogonal to each other in both the first retardation region and the second retardation region. Accordingly, the angle ⁇ 2x formed by the absorption axis of the polarizing film 32 in the first retardation region and the in-plane slow axis on the surface 181b of the second patterned optically anisotropic layer 18b is 26 ° in the first retardation region. It becomes.
  • the angle ⁇ 2y formed by the absorption axis of the polarizing film 32 in the second retardation region and the in-plane slow axis on the surface 181b of the second patterned optically anisotropic layer 18b is 116 ° in the first retardation region. It becomes.
  • the present invention is not limited to this mode, and may be in the range of ⁇ 26 ⁇ 20 °. Further, in FIG.
  • the present invention is not limited to this mode, and may be in the range of ⁇ 116 ⁇ 20 °.
  • the second pattern optical anisotropic layer 18b includes a homogeneously aligned liquid crystal compound. Therefore, the in-plane slow axis of the surface 181b on the first pattern optical anisotropic layer 16b side of the second pattern optical anisotropic layer 18b and the surface 182b on the opposite side to the first pattern optical anisotropic layer 16b side.
  • the in-plane slow axis at is substantially the same angle as the absorption axis of the polarizing film 32.
  • the in-plane slow axis on the surface 181b of the second patterned optical anisotropic layer 18b and the in-plane slow axis on the surface 182b of the second patterned optical anisotropic layer 18b are the first retardation region and the first retardation region. Both of the two phase difference regions are parallel.
  • the in-plane slow axis at the surface 121b in the first retardation region of the first pattern optical anisotropic layer 12b is based on the absorption axis of the polarizing film 32.
  • the in-plane slow axis of the surface 121b in the second retardation region is at a position of 33 °, and the twist direction of the liquid crystal compound in the first pattern optical anisotropic layer 16b is clockwise. Shows rotation (right twist). The twist direction is observed from the white arrow in FIG. 9A, and is twisted rightward with respect to the in-plane slow axis of the front surface (surface 161b) in the first pattern optical anisotropic layer 16b. Or determine the left twist.
  • the mode in which the twist direction of the liquid crystal compound is clockwise is described in detail, but the relationship may be reversed as long as a predetermined angle relationship is satisfied. More specifically, with respect to the absorption axis of the polarizing film 32, the in-plane slow axis at the surface 161b in the first retardation region of the first pattern optical anisotropic layer 16b is at a position of ⁇ 123 °, In addition, the in-plane slow axis on the surface 161b in the second retardation region is at a position of ⁇ 33 °, and the twist direction of the liquid crystal compound in the first pattern optical anisotropic layer 16b is counterclockwise (left twist). It may be an embodiment showing. This aspect corresponds to requirement (c).
  • Rth (550) of the transparent support Is preferably 70 nm to 90 nm, more preferably 75 nm to 85 nm, in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to a display device is smaller. .
  • Rth (550) of the transparent support Is preferably ⁇ 50 nm to ⁇ 30 nm, and preferably ⁇ 45 nm to ⁇ 35 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller. Is more preferable.
  • Rth (550) of the transparent support Is preferably 50 nm to 70 nm, and more preferably 55 nm to 65 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller.
  • Rth (550) of the transparent support is From the viewpoint that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller, it is preferably ⁇ 70 nm to ⁇ 50 nm, and preferably ⁇ 65 nm to ⁇ 55 nm. More preferred.
  • the transparent support 12 As a fourth embodiment of the circularly polarizing plate, as shown in FIG. 10, the transparent support 12, the second pattern optical anisotropic layer 18b, the first pattern optical anisotropic layer 16b, and the polarizing film 32 are used.
  • the circularly-polarizing plate 100d which has these in this order is mentioned.
  • the circularly polarizing plate 100d shown in FIG. 10 and the circularly polarizing plate 100c shown in FIG. 8 are the same except for the position of the transparent support 12.
  • the absorption axis of the polarizing film 32 and the in-plane slow axes of the first pattern optical anisotropic layer 16b and the second pattern optical anisotropic layer 18b similarly to the circularly polarizing plate 100c, the absorption axis of the polarizing film 32 and the in-plane slow axes of the first pattern optical anisotropic layer 16b and the second pattern optical anisotropic layer 18b.
  • the relationship satisfies the above requirement (c) or (d).
  • Rth (550) of the transparent support Is preferably 30 nm to 50 nm, more preferably 35 nm to 45 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to a display device is smaller. .
  • Rth (550) of the transparent support Is preferably ⁇ 30 nm to ⁇ 50 nm, and preferably ⁇ 35 nm to ⁇ 45 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller. Is more preferable.
  • Rth (550) of the transparent support Is preferably ⁇ 50 nm to ⁇ 30 nm, and preferably ⁇ 45 nm to ⁇ 35 nm in that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller. Is more preferable.
  • Rth (550) of the transparent support is From the viewpoint that the difference in visibility between the front direction and the oblique direction when the circularly polarizing plate is bonded to the display device is smaller, it is preferably ⁇ 110 nm to ⁇ 90 nm, and preferably ⁇ 105 nm to ⁇ 95 nm. More preferred.
  • the retardation plate and the circularly polarizing plate described above can be suitably used for a 3D image display device and a 3D image display system. More specifically, by arranging the above-described retardation plate or circularly polarizing plate on the viewing side of the display panel driven based on the image signal, the first retardation region of the light from the display panel is The polarization state of the light that has passed through and the light that has passed through the second phase difference region can be changed, and the video display panel can display a 3D stereoscopic video display.
  • Preparation of transparent support (hereinafter also referred to simply as support)> ⁇ Preparation of cellulose acylate film with Rth of -80 nm to -30 nm >> (Preparation of cellulose acylate)
  • a cellulose acylate having a total substitution degree of 2.97 (breakdown: acetyl substitution degree: 0.45, propionyl substitution degree: 2.52) was prepared.
  • As a catalyst a mixture of sulfuric acid (7.8 parts by mass with respect to 100 parts by mass of cellulose) and carboxylic acid anhydride was cooled to ⁇ 20 ° C., added to cellulose derived from pulp, and acylated at 40 ° C. At this time, the kind of acyl group and its substitution ratio were adjusted by adjusting the kind and amount of carboxylic anhydride. After acylation, aging was performed at 40 ° C. to adjust the total substitution degree.
  • cellulose acylate was gradually added to the 400 liter stainless steel dissolution tank having stirring blades and circulating cooling water around the periphery while stirring and dispersing the solvent and additives. . After completion of the addition, the mixture was stirred at room temperature for 2 hours, swollen for 3 hours, and then stirred again to obtain a cellulose acylate solution.
  • a dissolver type eccentric stirring shaft that stirs at a peripheral speed of 15 m / sec (shear stress 5 ⁇ 10 4 kgf / m / sec 2 ) and an anchor blade on the central axis and a peripheral speed of 1 m / sec.
  • a stirring shaft that stirs at a sec (shear stress of 1 ⁇ 10 4 kgf / m / sec 2 ) was used. Swelling was carried out with the high speed stirring shaft stopped and the peripheral speed of the stirring shaft having anchor blades set at 0.5 m / sec. 5) Filtration The cellulose acylate solution obtained above was filtered with a filter paper (# 63, manufactured by Toyo Roshi Kaisha, Ltd.) having an absolute filtration accuracy of 0.01 mm, and further a filter paper (FH025, Poll) having an absolute filtration accuracy of 2.5 ⁇ m. To obtain a cellulose acylate solution.
  • cellulose acylate film (Preparation of cellulose acylate film)
  • the cellulose acylate solution was heated to 30 ° C., and cast on a mirror surface stainless steel support having a band length of 60 m set at 15 ° C. through a casting Giesser (described in JP-A-11-314233).
  • the casting speed was 15 m / min and the coating width was 200 cm.
  • the space temperature of the entire casting part was set to 15 ° C.
  • the cellulose acylate film that had been cast and rotated 50 cm before the cast part was peeled off from the band, and 45 ° C. dry air was blown.
  • it was dried at 110 ° C. for 5 minutes and further at 140 ° C. for 10 minutes to obtain a cellulose acylate film.
  • the film thickness was adjusted to 30 ⁇ m to 100 ⁇ m, and various cellulose acylate films having Re (550) of 5 nm or less and Rth (550) of ⁇ 80 nm to ⁇
  • composition of additive solution Compound A-19 (retardation reducing agent) 49.3 parts by mass UV-102 (wavelength dispersion adjusting agent) 7.6 parts by mass Methylene chloride (first solvent) 58.4 parts by mass Methanol (second solvent) 8.7 parts by mass Cellulose acylate solution 12.8 parts by mass
  • a dope was prepared by mixing 474 parts by mass of the cellulose acylate solution with 25 parts by mass of the retardation increasing agent solution and thoroughly stirring.
  • the addition amount of the retardation increasing agent was 6.0 parts by mass with respect to 100 parts by mass of cellulose acylate.
  • the obtained dope was cast using a band stretching machine. After the film surface temperature on the band reached 40 ° C., the film was dried with warm air at 70 ° C. for 1 minute, and the film from the band was dried with 140 ° C. drying air for 10 minutes to obtain a cellulose acylate film.
  • the film thickness was adjusted to 30 ⁇ m to 100 ⁇ m, and various cellulose acylate films having Re (550) of 5 nm or less and Rth (550) of 45 nm to 100 nm were obtained.
  • Example 1 (Alkaline saponification treatment) After passing the support 5 through a dielectric heating roll having a temperature of 60 ° C. and raising the film surface temperature to 40 ° C., an alkaline solution having the following composition is applied to the band surface of the film using a bar coater. It was transported for 10 seconds under a steam far infrared heater manufactured by Noritake Co., Ltd., which was applied at / m 2 and heated to 110 ° C. Subsequently, 3 ml / m 2 of pure water was applied using the same bar coater. Next, washing with a fountain coater and draining with an air knife were repeated three times, and then the sheet was transported to a drying zone at 70 ° C. for 10 seconds and dried to prepare an alkali saponified cellulose acylate film.
  • Alkaline solution composition Alkaline solution composition (parts by mass) ⁇ Potassium hydroxide 4.7 parts by weight Water 15.8 parts by weight Isopropanol 63.7 parts by weight
  • Surfactant SF-1 C 14 H 29 O (CH 2 CH 2 O) 20 H 1.0 part by weight Propylene glycol 14. 8 parts by mass ⁇
  • the alignment film coating solution 1 having the following composition was prepared, filtered with a polypropylene filter having a pore size of 0.2 ⁇ m, and then continuously with a # 8 wire bar. Was applied. The film was dried with warm air of 100 ° C. for 2 minutes to obtain an alignment film 1 having a thickness of 0.6 ⁇ m. Next, a lattice mask in which openings and non-openings of 5 mm ⁇ 282 ⁇ m square are periodically formed with a pitch of 564 ⁇ m is used so that the repeating direction of the openings and non-openings is perpendicular to the film longitudinal direction.
  • the angle in the rubbing direction is a positive angle value in the counterclockwise direction with the longitudinal direction of the support being 0 ° as a reference when observing the support from the side on which the optically anisotropic layer described later is laminated. It is represented with a negative angle value in the clockwise direction.
  • a coating liquid (DLC (1)) containing a discotic liquid crystal compound shown in Table 2 was applied onto the prepared alignment film 1 with a # 3 wire bar.
  • the conveyance speed (V) of the film was 5 m / min.
  • the coating liquid was heated with hot air at 110 ° C. for 2 minutes.
  • UV irradiation 500 mJ / cm 2 was performed at 80 ° C. in a nitrogen environment to fix the alignment of the liquid crystal compound.
  • the discotic liquid crystal In the lattice mask exposure portion (first retardation region) of the alignment film 1, the discotic liquid crystal is vertically aligned with the slow axis direction parallel to the rubbing direction, and the unexposed portion (second retardation region) is rubbed.
  • the slow axis direction was perpendicular to the direction perpendicular to the direction.
  • the thickness of the optically anisotropic layer A was 1.25 ⁇ m in both the exposed area and the unexposed area.
  • Re (550) at 550 nm was 181 nm in all regions.
  • optically anisotropic layer B (Formation of patterned optically anisotropic layer B (hereinafter also simply referred to as “optically anisotropic layer B”))
  • a coating liquid (DLC (4)) containing a discotic liquid crystal compound shown in Table 2 was applied onto the optically anisotropic layer A prepared above # 3 was applied with a wire bar.
  • the conveyance speed (V) of the film was 5 m / min.
  • the coating liquid was heated with hot air at 110 ° C. for 2 minutes.
  • UV irradiation 500 mJ / cm 2
  • the thickness of the optically anisotropic layer B was 1.19 ⁇ m in both the first retardation region and the second retardation region.
  • ⁇ nd at 550 nm was 172 nm in any region.
  • the in-plane slow axis of the surface of the optical anisotropic layer B on the optical anisotropic layer A side is the surface of each optical anisotropic layer A in both the first retardation region and the second retardation region. It was parallel to the inner slow axis.
  • the twist angle of the discotic liquid crystal compound in the optically anisotropic layer B was 81 ° in both the first retardation region and the second retardation region. Further, when the longitudinal direction of the support is 0 ° as a reference, the rotation angle of the in-plane slow axis of the surface opposite to the optical anisotropic layer A side of the optical anisotropic layer B with respect to the longitudinal direction of the support was 94 ° in the first retardation region and 184 ° in the second retardation region. That is, the discotic liquid crystal compound forms a twisted structure clockwise.
  • the rotation angle of the in-plane slow axis is a positive angle value in the counterclockwise direction with reference to the absorption axis of the polarizing film by observing the support from the surface side on which the optically anisotropic layer is laminated. It is represented with a negative angle value in the clockwise direction.
  • the twisted structure of the discotic liquid crystal compound is obtained by observing the support from the surface side on which the optically anisotropic layer is laminated, and on the side opposite to the optically anisotropic layer A side of the optically anisotropic layer B. Whether the in-plane slow axis is clockwise or counterclockwise is determined based on the in-plane slow axis of the surface.
  • a polyvinyl alcohol (PVA) film having a thickness of 80 ⁇ m is dyed by immersing it in an aqueous iodine solution having an iodine concentration of 0.05% by mass at 30 ° C. for 60 seconds, and then in an aqueous boric acid solution having a boric acid concentration of 4% by mass.
  • the film was vertically stretched to 5 times the original length while being immersed for 2 seconds, and then dried at 50 ° C. for 4 minutes to obtain a polarizing film having a thickness of 20 ⁇ m.
  • TD80UL cellulose acylate film “TD80UL” (manufactured by FUJIFILM Corporation) was prepared, immersed in an aqueous sodium hydroxide solution at 55 ° C. at 1.5 mol / liter, and then thoroughly washed with water. . Then, after being immersed in a diluted sulfuric acid aqueous solution at 35 ° C. at 0.005 mol / liter for 1 minute, it was immersed in water to sufficiently wash away the diluted sulfuric acid aqueous solution. Finally, the sample was thoroughly dried at 120 ° C.
  • the above polarizing film and the above polarizing film protective film are coated with polyvinyl alcohol.
  • a long patterned circularly polarizing plate (P-1) was produced by continuous bonding using a system adhesive. That is, the patterned circularly polarizing plate (P-1) includes a polarizing film protective film, a polarizing film, a transparent support, an optically anisotropic layer A (corresponding to the second optically anisotropic layer), and an optically anisotropic layer B.
  • the absorption axis of the polarizing film coincides with the longitudinal direction of the circularly polarizing plate
  • the in-plane slow axis of the optically anisotropic layer A in the first retardation region is The in-plane slow axis of the surface opposite to the optically anisotropic layer A of the optically anisotropic layer B is at the position of ⁇ 13 ° and is at the position of ⁇ 94 °.
  • the in-plane slow axis of the optically anisotropic layer A in the second retardation region is at a position of ⁇ 103 °
  • the inner slow axis is at -184 °.
  • the rotation angle of the in-plane slow axis is expressed as a positive angle in the counterclockwise direction and a negative angle value in the clockwise direction with reference to the absorption axis of the polarizing film by observing the retardation film from the polarizing film side. .
  • Example 2> (Formation of orientation underlayer) An alignment base coating solution having the following composition was prepared on a saponified long support 2, filtered with a polypropylene filter having a pore size of 0.2 ⁇ m, and then continuously applied with a # 8 wire bar. The film was dried with warm air at 100 ° C. for 2 minutes to obtain a film having a thickness of 0.6 ⁇ m.
  • composition of alignment base coating solution ⁇
  • alignment film 2 (Formation of alignment film 2) Furthermore, an alignment film coating solution having the following composition was prepared and continuously coated with a # 8 wire bar. The alignment film 2 having a thickness of 0.15 ⁇ m was obtained by drying for 2 minutes with warm air of 100 ° C. Next, a lattice mask in which openings and non-openings of 5 mm ⁇ 282 ⁇ m are periodically formed at a pitch of 564 ⁇ m is used, and an alignment layer is formed so that the repeating direction of the openings and non-openings is perpendicular to the film longitudinal direction. Two sheets were placed on 2 at an interval of 1 m in the film longitudinal direction.
  • the arrangement of one mask is shifted in the direction perpendicular to the longitudinal direction of the 282 ⁇ m film with respect to the other, and the exposure area of the first mask is changed to the light-shielding area of the second mask.
  • the light shielding area is set to be the exposure area of the second mask.
  • a polarizing plate is arranged between each lattice mask and the UV lamp, and polarized ultraviolet rays are applied to the alignment film 2 using an air-cooled metal halide lamp having an illuminance of 2.5 mW / cm 2 in the UV-C region under air at room temperature. Irradiated.
  • the polarization transmission axis direction of the polarizing plate with respect to the longitudinal direction of the film is 13 °
  • the polarization transmission axis direction of the polarizing plate with respect to the longitudinal direction of the film is 103 °.
  • the polarization transmission direction of was adjusted. Under the mask having such an arrangement, the film was continuously conveyed in the longitudinal direction at a speed of 1 m / min, and the film was continuously irradiated with ultraviolet rays.
  • the angle in the direction of the polarization transmission axis is determined by observing the support from the side on which the optically anisotropic layer to be described later is laminated, the longitudinal direction of the support is 0 ° as a reference, and is positive in the counterclockwise direction. It is represented with a negative angle value in the clockwise direction.
  • composition of photo-alignment coating solution The following compounds 1 part by mass Tetrahydrofuran 100 parts by mass ⁇
  • the rod-like liquid crystal compound In the exposure portion (first retardation region) where the polarized light irradiation direction of the alignment film is 13 °, the rod-like liquid crystal compound is horizontally aligned with the slow axis direction parallel to the polarized light irradiation direction, and the polarized light irradiation direction is 103 °. In the portion (second retardation region), the rod-like liquid crystal compound was horizontally aligned with the slow axis direction parallel to the polarization irradiation direction.
  • a patterned circularly polarizing plate (P-2) was manufactured according to the same procedure as in Example 1.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-2) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-1).
  • Example 3 According to the same procedure as in Example 1, except that the support 7 was used instead of the support 5 and RLC (2) was used instead of DLC (4) in the production of the optically anisotropic layer B.
  • a circularly polarizing plate (P-3) was produced.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-3) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-1).
  • Example 4 A patterned circularly polarizing plate (P-4) was produced according to the same procedure as in Example 2, except that RLC (2) was used instead of DLC (4) in the production of the optically anisotropic layer B.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-4) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-1).
  • Example 5 In the production of the optically anisotropic layer A, the rubbing direction with respect to the longitudinal direction of the film in forming the optically anisotropic layer A is changed from 13 ° to ⁇ 94 °, and the support 8 is used instead of the support 5.
  • Example 1 except that DLC (3) was used instead of DLC (1) and DLC (2) was used instead of DLC (4) in the production of optically anisotropic layer B ( An alkali saponification treatment, (formation of alignment film), (formation of optically anisotropic layer A), and (formation of optically anisotropic layer B) were carried out to produce a retardation plate.
  • the above polarizing film and the above polarizing film protective film are continuously bonded using a polyvinyl alcohol-based adhesive.
  • a patterned circularly polarizing plate (P-5) was produced. That is, the patterned circularly polarizing plate (P-5) includes a polarizing film protective film, a polarizing film, an optically anisotropic layer B (corresponding to the second optically anisotropic layer), and an optically anisotropic layer A (the first film).
  • the transparent support is provided in this order, and the order of the polarizing film, the optically anisotropic layer B, the optically anisotropic layer A, and the transparent support is in the above-described embodiment of FIG. Applicable.
  • the absorption axis of the polarizing film coincides with the longitudinal direction of the patterned circularly polarizing plate, and the first retardation region and the second retardation region of the optically anisotropic layer B are based on the absorption axis of the polarizing film.
  • In-plane slow axes are respectively located at ⁇ 13 ° and ⁇ 103 °, and the surfaces of the optically anisotropic layer A opposite to the optically anisotropic layer B in the first retardation region and the second retardation region
  • the in-plane slow axes are located at -94 ° and -184 °, respectively.
  • the rotation angle of the in-plane slow axis is expressed as a positive angle in the counterclockwise direction and a negative angle value in the clockwise direction with reference to the absorption axis of the polarizing film by observing the retardation film from the polarizing film side. It is.
  • Example 6 According to the same procedure as in Example 5, except that the support 7 was used instead of the support 8 and RLC (1) was used instead of DLC (2) in the production of the optically anisotropic layer B.
  • a circularly polarizing plate (P-6) was produced.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-6) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-5).
  • Example 7 When forming the optically anisotropic layer A, the polarization transmission axis direction of the polarizing plate of the first mask with respect to the longitudinal direction of the film is changed from 13 ° to ⁇ 94 °, and the polarization of the second mask with respect to the longitudinal direction of the film is changed.
  • the polarization transmission axis direction of the plate is changed from 103 ° to ⁇ 184 °, the support 4 is used instead of the support 2, and the RLC (1) is used instead of the RLC (1) in the production of the optically anisotropic layer A.
  • a retardation plate was prepared according to the same procedure as in Example 2 except that 2) was used and DLC (2) was used instead of DLC (4) in the production of the optically anisotropic layer B.
  • the patterned circularly polarizing plate (P-7) includes a polarizing film protective film, a polarizing film, an optically anisotropic layer B (corresponding to the second optically anisotropic layer), and an optically anisotropic layer A (the first film).
  • the transparent support is provided in this order, and the order of the polarizing film, the optically anisotropic layer B, the optically anisotropic layer A, and the transparent support is in the above-described embodiment of FIG. Applicable.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-7) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. Same as plate (P-5).
  • Example 8> According to the same procedure as in Example 7, except that the support 3 was used instead of the support 4, and RLC (1) was used instead of DLC (2) in the production of the optically anisotropic layer B.
  • a circularly polarizing plate (P-8) was produced.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-8) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-5).
  • Example 9> The rubbing direction with respect to the film longitudinal direction during (formation of optically anisotropic layer A) was changed from 13 ° to ⁇ 123 °, and support 8 was used instead of support 5, In the production, DLC (5) is used instead of DLC (1), and in the production of the optically anisotropic layer B, DLC (6) is used instead of DLC (4).
  • the alignment film 1 is formed between the formation of the layer A and the formation of the optically anisotropic layer B, and the alignment film before the formation of the optically anisotropic layer A is formed on the formed alignment film.
  • a patterned circularly polarizing plate (P-9) was produced according to the same procedure as in Example 1 except that it was formed. . That is, the patterned circularly polarizing plate (P-9) includes a polarizing film protective film, a polarizing film, a transparent support, an optically anisotropic layer A (corresponding to the first optically anisotropic layer), and an optically anisotropic layer B.
  • the absorption axis of the polarizing film coincides with the longitudinal direction of the patterned circularly polarizing plate, and the first retardation region and the second retardation region of the optically anisotropic layer B are based on the absorption axis of the polarizing film.
  • In-plane slow axes are located at ⁇ 26 ° and ⁇ 116 °, respectively, and the surface of the optically anisotropic layer A on the opposite side to the optically anisotropic layer B in the first retardation region and the second retardation region
  • the in-plane slow axes of are located at 123 ° and 33 °, respectively.
  • the rotation angle of the in-plane slow axis is expressed as a positive angle in the counterclockwise direction and a negative angle value in the clockwise direction with reference to the absorption axis of the polarizing film by observing the retardation film from the polarizing film side. It is.
  • Example 10> The polarization transmission axis direction of the polarizing plate of the first mask with respect to the film longitudinal direction during (formation of optically anisotropic layer A) is changed from 13 ° to ⁇ 123 °, and the second mask with respect to the film longitudinal direction The polarizing transmission axis direction of the polarizing plate is changed from 103 ° to ⁇ 33 °, the support 4 is used instead of the support 2, and RLC (1) is used instead of the RLC (1) in the production of the optically anisotropic layer A.
  • RLC (3) is used, DLC (6) is used instead of DLC (4) in the production of optically anisotropic layer B, (formation of optically anisotropic layer A) and (optically anisotropic)
  • the formation step of the alignment film 1 is provided between the formation of the layer B and the formed alignment film is exposed to the first mask exposure region of the alignment film 2 before the optical anisotropic layer A is formed.
  • UV exposure is performed so that the irradiated alignment film region and the mask opening coincide with each other, and the film longitudinal direction is used as a reference.
  • Rubbed 26 ° direction Te except that the formation of the optically anisotropic layer B on the alignment film, to produce a pattern circularly polarizing plate (P-10) according to the procedure as in Example 2.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-10) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-9).
  • Example 11 When the support 7 is used instead of the support 8, RLC (4) is used instead of DLC (6) in the production of the optically anisotropic layer B (formation of the optically anisotropic layer A), (The formation of the optical anisotropic layer B) is provided with the alignment film 2 forming step, the polarization transmission axis direction of the polarizing plate of the first mask with respect to the film longitudinal direction is set to 26 °, and the film longitudinal direction is A patterned circularly polarizing plate (P-11) was produced according to the same procedure as in Example 9 except that the polarization transmission axis direction of the polarizing plate of the second mask was 116 °.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-11) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-9).
  • Example 12 When the support 3 is used instead of the support 4, RLC (4) is used instead of DLC (6) in the production of the optically anisotropic layer B (formation of the optically anisotropic layer A), (The formation of the optically anisotropic layer B) is provided with the alignment film 2 forming step, the polarization transmission axis direction of the polarizing plate of the first mask with respect to the film longitudinal direction is set to 26 °, and the film longitudinal direction is A patterned circularly polarizing plate (P-12) was produced according to the same procedure as in Example 10, except that the polarization transmission axis direction of the polarizing plate of the second mask was 116 °.
  • the angle relationship between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-12) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-9).
  • Example 13> The rubbing direction with respect to the longitudinal direction of the film during (formation of the optically anisotropic layer A) is changed from ⁇ 94 ° to ⁇ 26 °, and the support 6 is used in place of the support 8, and the optically anisotropic layer A DLC (6) is used in place of DLC (3) in the production of DLC (5), and DLC (5) is used in place of DLC (2) in the production of the optically anisotropic layer B.
  • Orientation layer 1) and (formation of optically anisotropic layer B) are provided with the above-mentioned orientation film 1 formation step, and the orientation film before the formation of optically anisotropic layer A is formed with respect to the formed orientation film.
  • UV exposure is performed so that the alignment film region irradiated by the mask exposure of the film 1 and the mask opening coincide with each other, and rubbing is performed in the direction of 64 ° with respect to the longitudinal direction of the film, and the optically anisotropic layer B is formed on the alignment film.
  • Alkali saponification treatment (Alkali saponification treatment), (Formation of alignment film), (Optically anisotropic layer) Formation), and (conduct formation of the optically anisotropic layer B), was produced a retardation plate.
  • the above-mentioned polarizing film and the above-mentioned polarizing film protective film are continuously bonded using a polyvinyl alcohol-based adhesive.
  • Shaped circularly polarizing plate (P-13) was produced. That is, the patterned circularly polarizing plate (P-13) includes a polarizing film protective film, a polarizing film, an optically anisotropic layer B (corresponding to the first optically anisotropic layer), an optically anisotropic layer A (the second Corresponding to the optically anisotropic layer), the transparent support is provided in this order, and the order of the polarizing film, the optically anisotropic layer B, the optically anisotropic layer A, and the transparent support is in the above-described embodiment of FIG. Applicable.
  • the absorption axis of the polarizing film coincides with the longitudinal direction of the patterned circularly polarizing plate, and the first retardation region and the second retardation region of the optically anisotropic layer B are based on the absorption axis of the polarizing film.
  • In-plane slow axes are located at ⁇ 26 ° and ⁇ 116 °, respectively, and the surface of the optically anisotropic layer A on the opposite side to the optically anisotropic layer B in the first retardation region and the second retardation region
  • the in-plane slow axes of are located at 123 ° and 33 °, respectively.
  • the rotation angle of the in-plane slow axis is expressed as a positive angle in the counterclockwise direction and a negative angle value in the clockwise direction with reference to the absorption axis of the polarizing film by observing the retardation film from the polarizing film side. It is.
  • Example 14 When the support 4 is used instead of the support 6 and RLC (3) is used instead of DLC (5) in the production of the optically anisotropic layer B, (formation of the optically anisotropic layer A) and (The formation of the optically anisotropic layer B) is provided with the alignment film 2 forming step, the polarization transmission axis direction of the polarizing plate of the first mask with respect to the film longitudinal direction is set to 64 °, and the film longitudinal direction A patterned circularly polarizing plate (P-14) was produced according to the same procedure as in Example 13 except that the polarization transmission axis direction of the polarizing plate of the second mask was ⁇ 26 °.
  • the angle relationship between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-14) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. Same as plate (P-13).
  • RLC (4) is used instead of RLC (3) when manufacturing optically anisotropic layer A
  • DLC (5) is used instead of DLC (6) when manufacturing optically anisotropic layer B
  • the polarizing transmission axis direction of the polarizing plate of the first mask with respect to the film longitudinal direction during (formation of optically anisotropic layer A) is changed from ⁇ 123 ° to ⁇ 26 °, and two sheets with respect to the film longitudinal direction.
  • the polarization transmission axis direction of the polarizing plate of the eye mask is changed from ⁇ 33 ° to ⁇ 116 °, and the above-mentioned orientation is formed between (formation of optically anisotropic layer A) and (formation of optically anisotropic layer B).
  • An alignment film region and a mask opening irradiated by the exposure region of the first mask of the alignment film 2 before the formation of the optically anisotropic layer A are provided on the alignment film formed by providing the film 1 forming step.
  • UV light is mask-exposed to match, and the film is rubbed in the direction of 64 ° with respect to the longitudinal direction of the film.
  • a patterned circularly polarizing plate (P-15) was produced according to the same procedure as in Example 10 except that the optically anisotropic layer B was formed thereon.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-15) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. Same as plate (P-13).
  • Example 16> Using the support 1 instead of the support 4 and using RLC (3) instead of DLC (5) in the production of the optically anisotropic layer B (formation of the optically anisotropic layer A) and (The formation of the optically anisotropic layer B) is provided with the alignment film 2 forming step, the polarization transmission axis direction of the polarizing plate of the first mask with respect to the film longitudinal direction is set to 64 °, and the film longitudinal direction is A patterned circularly polarizing plate (P-16) was produced according to the same procedure as in Example 15 except that the polarization transmission axis direction of the polarizing plate of the second mask was ⁇ 26 °.
  • the relationship between the angle between the absorption axis of the polarizing film in the patterned circularly polarizing plate (P-16) and the in-plane slow axes of the optically anisotropic layer A and the optically anisotropic layer B is as follows. It was the same as the plate (P-13).
  • Table 2 shows the compositions of DLC (1) to (6) and RLC (1) to (4) used in Examples 1 to 16 above.
  • various conditions such as the alignment temperature, the alignment time, and the polymerization temperature are as follows: The conditions in Table 2 were followed.
  • the relationship between the absorption axis of the polarizing film and the in-plane slow axes of the first pattern optical anisotropic layer and the second pattern optical anisotropic layer in Examples 1 to 8 described above is shown in FIG. It corresponds to the aspect of.
  • the rotation angle of the in-plane slow axis of the optically anisotropic layer A and the optically anisotropic layer B with respect to the absorption axis of the polarizing film is counterclockwise by observing the retardation plate from the polarizing film side. Positive values are shown with a negative value in the clockwise direction.
  • the rod-like liquid crystal compound was horizontally aligned with the slow axis direction parallel to the polarized light irradiation direction, and each phase difference was 137 nm.
  • the above-mentioned polarizing film and the above-mentioned polarizing film protective film are crossed at an angle of 45 degrees between the in-plane slow axis of the retardation film and the absorption axis of the polarizing film.
  • a patterned circularly polarizing plate (P-17) (Comparative Example 1) was prepared by using a polyvinyl alcohol-based adhesive. That is, the patterned circularly polarizing plate has a polarizing film protective film, a polarizing film, and a pattern ⁇ / 4 plate in this order.
  • a circularly polarizing plate (G-2) was produced according to the same procedure except that the rubbing direction was changed from 13 ° to 103 °.
  • These circularly polarizing plates were mounted on the left and right sides of the spectacle frame so that the polarizing layer side was on the eyeball side to produce 3D spectacles.
  • each manufactured 3D display device is set to 3D display, with one eye displayed in white and the other eye displayed in black, and a measuring instrument (manufactured by BM-5A Topcon) is placed through the white display side glasses.
  • a measuring instrument manufactured by BM-5A Topcon
  • the whiteness of the glasses during rotation was measured.
  • the patterning period of the patterning retardation film is in the vertical direction, the crosstalk performance in 3D display in the vertical direction is deteriorated in principle, so it is important to improve the viewing angle performance in the horizontal direction. Therefore, based on the difference between the minimum value and the maximum value of the color v ′ in the white display at the azimuth angle of 0 degrees and the polar angle of 45 degrees, the evaluation was made according to the following criteria.
  • v ′ change of white display is less than 0.015 (acceptable to such an extent that a very slight tint is visually recognized)
  • B: v ′ change of white display is 0.015 or more and less than 0.025 (color tinting is visually recognized).
  • C: v ′ change of white display is 0.025 or more (a color tint is intense and unacceptable)
  • the pattern circularly polarizing plates (P-1) to (P-16) were all A, but the pattern circularly polarizing plate (P-17) of the comparative example was C.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

La présente invention vise à proposer ce qui suit : un retardateur qui, lorsqu'il est fixé à un dispositif d'affichage en tant que polariseur circulaire, empêche de manière suffisante un décalage de couleur lors d'une inclinaison de tête ; un polariseur circulaire ; et un dispositif d'affichage d'image en trois dimensions. Ce retardateur a, au moins, une couche anisotrope à motif optique qui contient des premières régions de retard et des secondes régions de retard qui ont différents axes lents dans le plan, lesdites premières et secondes régions de retard étant disposées de façon à être alternées dans un plan. La couche anisotrope à motif optique comprend une première couche anisotrope à motif optique et une seconde couche anisotrope à motif optique stratifiées ensemble. L'axe lent dans le plan de la première couche anisotrope à motif optique et l'axe lent dans le plan de la seconde couche anisotrope à motif optique présentent une relation donnée.
PCT/JP2014/058104 2013-03-25 2014-03-24 Retardateur, polariseur circulaire et dispositif d'affichage d'image en trois dimensions Ceased WO2014157102A1 (fr)

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CN115989450A (zh) * 2020-08-25 2023-04-18 富士胶片株式会社 光学膜、圆偏振片、有机电致发光显示装置

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JPH09138308A (ja) * 1995-10-13 1997-05-27 Sharp Corp パターン偏光回転光学素子およびパターン偏光回転光学素子の製造方法、ならびに３ｄディスプレイ
JPH1090675A (ja) * 1996-07-04 1998-04-10 Sharp Corp 旋光光学素子およびその製造方法と、それを用いた画像表示装置
JPH11352454A (ja) * 1998-06-11 1999-12-24 Asahi Glass Co Ltd アレイシート、その製造方法、３次元表示装置および３次元像表示システム
US20020159004A1 (en) * 2001-04-27 2002-10-31 Jin-Hee Jung Autostereoscopic display apparatus and method of manufacturing the same
JP2007504484A (ja) * 2003-08-26 2007-03-01 メルク　パテント　ゲゼルシャフト　ミット　ベシュレンクテル　ハフトング ねじれパターンを有するポリマーフィルム
JP2009265130A (ja) * 2008-04-22 2009-11-12 Fujifilm Corp 光学異方性膜
JP2010503878A (ja) * 2006-09-13 2010-02-04 ロリク アーゲー ボリューム光アラインされたリターダ
JP2011169948A (ja) * 2010-02-16 2011-09-01 Fujifilm Corp パターニング位相差フィルムとその製造方法、偏光眼鏡、映像表示システムとその製造方法
WO2012011435A1 (fr) * 2010-07-20 2012-01-26 日本ゼオン株式会社 Corps multicouche à films à différence de phase utilisé dans un dispositif de formation d'image stéréoscopique

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Publication number Priority date Publication date Assignee Title
JPH08292432A (ja) * 1995-04-20 1996-11-05 Nippon Oil Co Ltd 光学フィルムの製造方法
JPH09138308A (ja) * 1995-10-13 1997-05-27 Sharp Corp パターン偏光回転光学素子およびパターン偏光回転光学素子の製造方法、ならびに３ｄディスプレイ
JPH1090675A (ja) * 1996-07-04 1998-04-10 Sharp Corp 旋光光学素子およびその製造方法と、それを用いた画像表示装置
JPH11352454A (ja) * 1998-06-11 1999-12-24 Asahi Glass Co Ltd アレイシート、その製造方法、３次元表示装置および３次元像表示システム
US20020159004A1 (en) * 2001-04-27 2002-10-31 Jin-Hee Jung Autostereoscopic display apparatus and method of manufacturing the same
JP2007504484A (ja) * 2003-08-26 2007-03-01 メルク　パテント　ゲゼルシャフト　ミット　ベシュレンクテル　ハフトング ねじれパターンを有するポリマーフィルム
JP2010503878A (ja) * 2006-09-13 2010-02-04 ロリク アーゲー ボリューム光アラインされたリターダ
JP2009265130A (ja) * 2008-04-22 2009-11-12 Fujifilm Corp 光学異方性膜
JP2011169948A (ja) * 2010-02-16 2011-09-01 Fujifilm Corp パターニング位相差フィルムとその製造方法、偏光眼鏡、映像表示システムとその製造方法
WO2012011435A1 (fr) * 2010-07-20 2012-01-26 日本ゼオン株式会社 Corps multicouche à films à différence de phase utilisé dans un dispositif de formation d'image stéréoscopique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115989450A (zh) * 2020-08-25 2023-04-18 富士胶片株式会社 光学膜、圆偏振片、有机电致发光显示装置

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