WO2019142831A1 - 光学異方体及びその製造方法 - Google Patents

光学異方体及びその製造方法 Download PDF

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WO2019142831A1
WO2019142831A1 PCT/JP2019/001137 JP2019001137W WO2019142831A1 WO 2019142831 A1 WO2019142831 A1 WO 2019142831A1 JP 2019001137 W JP2019001137 W JP 2019001137W WO 2019142831 A1 WO2019142831 A1 WO 2019142831A1
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group
layer
liquid crystal
optically anisotropic
region
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PCT/JP2019/001137
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English (en)
French (fr)
Japanese (ja)
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俊平 中島
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日本ゼオン株式会社
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    • 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
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to an optical anisotropic member and a method for producing the same.
  • optical anisotropic body manufactured using a liquid crystalline compound is known as one of the optical members.
  • This optically anisotropic body generally includes an optically anisotropic layer including a region formed of a cured product in which a liquid crystal composition containing a liquid crystal compound is aligned and cured while maintaining the alignment state.
  • an optical anisotropic member the one described in Patent Document 1 has been proposed.
  • Patent No. 5363022 gazette
  • the optically anisotropic layer provided in the optically anisotropic body usually has an in-plane retardation caused by a liquid crystal compound. Therefore, the optically anisotropic body can be applied to a polarizing plate such as a circularly polarizing plate and an elliptically polarizing plate provided in an organic electroluminescence display panel (hereinafter sometimes referred to as “organic EL display panel” as appropriate).
  • This polarizing plate usually contains a combination of a linear polarizer and an optically anisotropic material.
  • Such a polarizing plate can function as a reflection suppressing film having a reflection suppressing ability. Therefore, by providing the polarizing plate on the display surface of the organic EL display panel, reflection of external light can be suppressed in the front direction of the display surface.
  • a polarizing plate as a reflection suppression film is designed to be able to suppress the reflection of light transmitted in the thickness direction. Therefore, usually, the in-plane retardation of the optically anisotropic layer measured in the thickness direction is appropriately adjusted. Thus, the light incident on the display surface in the front direction is appropriately converted in polarization state during transmission through the optically anisotropic layer twice before and after reflection, and the reflection is suppressed.
  • the in-plane retardation described above is different from the retardation measured in the tilt direction. Therefore, the light incident on the display surface in the inclined direction can not properly convert its polarization state during transmission through the optically anisotropic layer twice before and after reflection, so the ability to suppress reflection tends to be low. There is.
  • the polarization state of light passing through the optically anisotropic layer twice in the tilt direction is appropriately selected. It is desirable to devise the retardation of the optically anisotropic layer so that it can be adjusted. Specifically, for light passing through the optically anisotropic layer twice at a polar angle "-.phi.” Which has the same polar angle "+ .phi.” And the same magnitude (absolute value) and an opposite sign in one or more azimuths.
  • the polar angle is the polar angle of the layer plane of the optically anisotropic layer, and usually corresponds to the viewing angle of the image display device.
  • Such an optically anisotropic layer is also useful in applications other than the organic EL display panel.
  • the present invention has been made in view of the above problems, and in one or more azimuths, the polar angle "+ .phi.” And the same size as that and the polar anisotropic sign "-.phi.”
  • Optical anisotropic material capable of bringing the retardation given to light transmitted twice through to the retardation given to light transmitted through the optically anisotropic layer twice in the thickness direction, and a method for producing the same.
  • the inventor of the present invention has determined that the following requirement (1) is satisfied in the cross section of the optically anisotropic layer parallel to both the in-plane slow axis and thickness direction of the optically anisotropic layer: It has been found that the problem can be solved by including the combination of the first region and the second region satisfying (4) to complete the present invention.
  • the first region has a first slow axis inclined with respect to the in-plane direction of the optically anisotropic layer.
  • the second region has a second slow axis inclined with respect to the in-plane direction of the optically anisotropic layer.
  • the angle ⁇ between the first slow axis and the second slow axis is in a predetermined range. That is, the present invention includes the following.
  • An optically anisotropic material comprising an optically anisotropic layer formed of a cured product of a liquid crystal composition containing a liquid crystal compound, the first region and the second region satisfying the following requirements (1) to (4): .
  • the first region has a first slow axis inclined with respect to the in-plane direction of the optically anisotropic layer.
  • the second region has a second slow axis inclined with respect to the in-plane direction of the optically anisotropic layer.
  • an angle ⁇ between the first slow axis and the second slow axis is 0 ° to 20 °.
  • an angle ⁇ 1 formed by the first slow axis of the first region with respect to the in-plane direction of the optically anisotropic layer, and a second of the second region The optically anisotropic body according to [1] or [2], wherein the sum of the slow axis and the angle ⁇ 2 of the in-plane direction of the optically anisotropic layer is 40 ° to 80 °.
  • an angle ⁇ 1 formed by the first slow axis of the first region with respect to the in-plane direction of the optically anisotropic layer is 20 ° to 40 °.
  • an angle ⁇ 2 formed by the second slow axis of the second region with respect to the in-plane direction of the optically anisotropic layer is 20 ° to 40 °
  • a polarizing plate comprising the optical anisotropic member according to any one of [1] to [9] and a linear polarizer.
  • FIG. 1 is a perspective view schematically showing an optical anisotropic member according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view schematically showing an optically anisotropic layer of the optically anisotropic member according to the first embodiment of the present invention.
  • FIG. 3 is a perspective view schematically showing a part of an optically anisotropic layer as an example cut in a plane parallel to the in-plane slow axis of the optically anisotropic layer and not parallel to the thickness direction. It is.
  • FIG. 4 is a cross-sectional view schematically showing an optically anisotropic layer of the optically anisotropic member according to the first embodiment of the present invention.
  • FIG. 4 is a cross-sectional view schematically showing an optically anisotropic layer of the optically anisotropic member according to the first embodiment of the present invention.
  • FIG. 5 is a cross-sectional view schematically showing an optically anisotropic layer of the optically anisotropic member according to the first embodiment of the present invention.
  • FIG. 6 is a cross-sectional view schematically showing an optically anisotropic layer of the optically anisotropic member according to the first embodiment of the present invention.
  • FIG. 7 is a cross-sectional view schematically showing an optically anisotropic layer of the optically anisotropic member according to the first embodiment of the present invention.
  • FIG. 8 is a perspective view schematically showing an optical anisotropic member according to a second embodiment of the present invention.
  • FIG. 9 is a cross-sectional view schematically showing an optically anisotropic layer of an optically anisotropic member according to a second embodiment of the present invention.
  • the “in-plane direction” of a layer means a direction parallel to the layer plane unless otherwise specified.
  • the “thickness direction” of a certain layer indicates the direction perpendicular to the plane of the layer, unless otherwise specified. Therefore, unless otherwise specified, the in-plane direction and thickness direction of a given layer are perpendicular.
  • the “inclination direction” of a layer means a direction neither parallel nor perpendicular to the layer plane unless specifically stated otherwise, specifically, the polar angle of the layer plane is not less than 5 ° and not more than 85 °. Point in the direction of the range.
  • the “direction” in the tilt direction of a layer represents a component parallel to the layer plane in the tilt direction.
  • the “front direction” of a surface means the normal direction of the surface unless specifically stated otherwise, and specifically refers to the direction of the polar angle of 0 ° of the surface.
  • the “inclination direction” of a surface means a direction neither parallel nor perpendicular to the surface unless specifically stated otherwise, specifically, the polar angle of the surface is in the range of 5 ° to 85 °. Point in the direction of
  • the “in-plane slow axis” of a layer means the slow axis in the in-plane direction unless otherwise specified.
  • the “in-plane fast axis” of a layer means the fast axis in the in-plane direction, unless otherwise specified.
  • the “tilt angle” of the molecules of the liquid crystal compound contained in a certain layer indicates the angle that the molecules of the liquid crystal compound form with the layer plane.
  • This tilt angle corresponds to the largest angle among the angles that the direction of the largest refractive index makes with the layer plane in the refractive index ellipsoid of the molecules of the liquid crystal compound. Therefore, when the direction of the maximum refractive index in the refractive index ellipsoid is one, the angle that the direction forms with the layer plane corresponds to the tilt angle. Further, in the case where there are a plurality of directions of the maximum refractive index in the refractive index ellipsoid, the angle formed by the direction in which the angle formed with the layer plane is the largest among those directions corresponds to the tilt angle.
  • the birefringence ⁇ n (450) at a wavelength of 450 nm and the birefringence ⁇ n (550) at a wavelength of 550 nm satisfy the following formula (N1) unless otherwise specified: Say Generally, a liquid crystal compound capable of expressing such reverse wavelength dispersive birefringence can exhibit greater birefringence as the measurement wavelength is longer. ⁇ n (450) ⁇ n (550) (N1)
  • the birefringence ⁇ n (450) at a wavelength of 450 nm and the birefringence ⁇ n (550) at a wavelength of 550 nm satisfy the following formula (N2), unless otherwise specified.
  • N2 the following formula
  • nx represents the refractive index in the direction (in-plane direction) perpendicular to the thickness direction of the layer and in the direction giving the maximum refractive index.
  • ny represents the refractive index of the in-plane direction of the layer, which is perpendicular to the nx direction.
  • d represents the thickness of the layer.
  • the measurement wavelength of retardation is 550 nm unless otherwise stated.
  • the in-plane retardation Re can be measured using a retardation meter ("AxoScan" manufactured by Axometrics).
  • a resin having a positive intrinsic birefringence value means a resin in which the refractive index in the stretching direction is larger than the refractive index in the direction orthogonal thereto.
  • a resin having a negative intrinsic birefringence value means a resin in which the refractive index in the stretching direction is smaller than the refractive index in the direction orthogonal thereto.
  • the intrinsic birefringence value can be calculated from the dielectric constant distribution.
  • the number of carbon atoms of the group having a substituent does not include the number of carbon atoms of the substituent unless otherwise specified.
  • an alkyl group having 1 to 20 carbon atoms which may have a substituent means that the alkyl group itself does not include the carbon atom number of the substituent, and the carbon atom number is 1 to 20. Represents that.
  • FIG. 1 is a perspective view schematically showing an optical anisotropic member 10 according to a first embodiment of the present invention. As shown in FIG. 1, the optical anisotropic member 10 according to the first embodiment of the present invention includes an optically anisotropic layer 100.
  • the optically anisotropic layer 100 has an in-plane slow axis A1 where the refractive index is maximum, and the in-plane direction of the optically anisotropic layer 100 a refractive index And the in-plane fast axis A 2 at which Further, in FIG. 1, the thickness direction of the optically anisotropic layer 100 is indicated by an arrow A3. Furthermore, the polar angle ⁇ 1 of the layer plane of the optically anisotropic layer 100 and the tilt direction of the azimuth angle ⁇ 2 with respect to the in-plane slow axis A1 are indicated by arrow A4, and the tilt direction indicated by arrow A4 is indicated by arrow A5.
  • FIG. 2 is a cross-sectional view schematically showing the optically anisotropic layer 100 of the optically anisotropic member 10 according to the first embodiment of the present invention.
  • a cross section obtained by cutting the optically anisotropic layer 100 in a plane parallel to both the in-plane slow axis A1 (see FIG. 1) and the thickness direction A3 (see FIG. 1) of the optically anisotropic layer 100.
  • a cross section of a layer parallel to both the in-plane slow axis and the thickness direction of the layer may be referred to as a “specific cross section”.
  • the optically anisotropic layer 100 includes a first region 110 and a second region 120 formed of a cured product of a liquid crystal composition containing a liquid crystal compound.
  • the first region 110 and the second region 120 are layered regions that extend parallel to the in-plane direction A6 of the optically anisotropic layer 100 (that is, parallel to the layer plane).
  • the first region 110 and the second region 120 are at different positions in the thickness direction A3 (see FIG. 1) of the optically anisotropic layer 100.
  • the entire optically anisotropic layer 100 is a layer formed of a cured product of a liquid crystal composition, and a portion thereof is the first region 110 and the remaining portion is the second region 120. An example is shown and demonstrated.
  • the layer formed of the cured layer of the liquid crystal composition may be referred to as “liquid crystal cured layer” as appropriate.
  • the first region 110 is a region included in a certain range in the thickness direction of the liquid crystal cured layer as the optically anisotropic layer 100
  • the second region 120 is the liquid crystal cured layer Is an area included in another range in the thickness direction.
  • the first region 110 and the second region 120 are observed separately (requirement (1)).
  • the polarization observation is usually performed in crossed nicols using a polarization microscope equipped with a wavelength plate such as a 1 ⁇ 4 wavelength plate as an inspection plate.
  • the optically anisotropic layer 100 including the first region 110 and the second region 120 which are separately observed by polarization observation has a conventional optical anisotropy in which the retardation and the slow axis are constant throughout the specific cross section. The sex layer is clearly different.
  • the following aspect may be mentioned as the aspect when being distinguished and observed.
  • (1A) A mode in which the first area 110 and the second area 120 are distinguished and observed by the polarization observation using the plate, because the color of the first area 110 and the color of the second area 120 are different.
  • (1B) By polarized light observation using an inspection plate, the color of the first area 110 and the color of the second area 120 are the same, but an area of another color between the first area 110 and the second area 120
  • the first region 110 is observed when a section including the specific cross section 100S is polarized.
  • An example in which the second region 120 and the second region 120 are distinguished and observed will be described.
  • the first region 110 is formed of a cured product of a liquid crystal composition, and thus includes a liquid crystal compound.
  • the “liquid crystal compound” contained in the cured product of the liquid crystal composition also includes a polymerized liquid crystal compound.
  • the first region 110 at least some of the molecules (not shown) of the liquid crystal compound are inclined relative to the in-plane direction A6 of the optically anisotropic layer 100 (that is, relative to the layer plane). It is oriented to Therefore, in the specific cross section 100S of the optically anisotropic layer 100, the first region 110 is inclined with respect to the in-plane direction A6 of the optically anisotropic layer 100 (that is, with respect to the layer plane).
  • A110 is included (requirement (2)).
  • the first slow axis A110 is a direction parallel to the specific cross section 100S of the optically anisotropic layer 100, in which the refractive index of the first region 110 is the largest.
  • the second region 120 since the second region 120 is also formed of a cured product of the liquid crystal composition, the second region 120 includes a liquid crystal compound. Also in the second region 120, at least a part of the molecules (not shown) of the liquid crystal compound is inclined relative to the in-plane direction A6 of the optically anisotropic layer 100 (that is, relative to the layer plane). doing. Therefore, in the specific cross section 100S of the optically anisotropic layer 100, the second region 120 has a second slow axis inclined with respect to the in-plane direction A6 of the optically anisotropic layer 100 (that is, relative to the layer plane). It has A120 (requirement (3)). The second slow axis A120 is a direction in which the refractive index of the second region 120 is the largest among the directions parallel to the specific cross section 100S of the optically anisotropic layer 100.
  • the first slow axis A110 and the second slow axis A120 form an angle ⁇ of a predetermined range (requirement (4)).
  • the angle ⁇ is usually 0 ° or more, and usually 20 ° or less, preferably 10 ° or less, and particularly preferably 5 ° or less.
  • the optically anisotropic layer 100 satisfying the above requirements has an inclination direction A4 having the same polar angle “+ ⁇ ” and the same magnitude (absolute value) and an opposite sign “- ⁇ ” in one or more azimuths.
  • the retardation given to the light passing through the optically anisotropic layer 100 twice can be made close to the retardation given to the light passing through the optically anisotropic layer 100 twice in the thickness direction A3. Therefore, this optically anisotropic layer 100 has a suitable range of retardation that can suppress reflection not only for external light incident in the thickness direction A3 but also for external light incident in the inclination direction A4. be able to.
  • the polarizing plate is obtained by combining the optical anisotropic member 10 provided with the optically anisotropic layer 100 with a linear polarizer, the reflection suppressing ability by the polarizing plate can be exhibited in a wide incident angle range. Excellent viewing angle characteristics can be obtained.
  • An angle ⁇ 1 formed by the first slow axis A110 of the first region 110 with respect to the in-plane direction A6 of the optically anisotropic layer 100 (that is, with respect to the layer plane) in the specific cross section 100S of the optically anisotropic layer 100 is , Preferably within a predetermined range.
  • the angle ⁇ 1 is preferably 20 ° or more, more preferably 25 ° or more, particularly preferably 27 ° or more, preferably 40 ° or less, more preferably 35 ° or less, particularly preferably 33 ° or less It is.
  • the angle ⁇ 2 that the second slow axis A120 of the second region 120 makes with the in-plane direction A6 of the optically anisotropic layer 100 (that is, with respect to the layer plane) in the specific cross section 100S of the optically anisotropic layer 100 is , Preferably within a predetermined range.
  • the angle ⁇ 2 is preferably 20 ° or more, more preferably 25 ° or more, particularly preferably 27 ° or more, preferably 40 ° or less, more preferably 35 ° or less, particularly preferably 33 ° or less It is.
  • the first slow axis A110 of the first region 110 is in the in-plane direction A6 of the optically anisotropic layer 100 (that is, relative to the layer plane).
  • the sum of the angle ⁇ 1 and the angle ⁇ 2 formed by the second slow axis A120 of the second region 120 with respect to the in-plane direction A6 of the optically anisotropic layer 100 (that is, with respect to the layer plane) is a predetermined range It is preferable to fit within.
  • the sum of the angle ⁇ 1 and the angle ⁇ 2 is preferably 40 ° or more, more preferably 50 ° or more, particularly preferably 54 ° or more, preferably 80 ° or less, more preferably 70 ° or less. Particularly preferred is 66 ° or less.
  • the first slow axis A110 of the first region 110 and the second slow axis A120 of the second region 120 in the specific cross section 100S of the optically anisotropic layer 100 have the optically anisotropic layer 100 in the in-plane slow axis A1. It can be measured by polarized observation of a section including a cross section appearing by cutting in parallel planes.
  • the optical anisotropic layer 100 is cut at a plane parallel to both the in-plane slow axis A1 and the thickness direction A3 of the optical anisotropic layer 100 to form the specific cross section 100S. Then, polarization observation of the section including the specific cross section 100S is performed. Polarized light observation can be performed in crossed nicols using a polarized light microscope. At this time, polarization observation is performed while rotating the optically anisotropic layer 100 about an axis perpendicular to the specific cross section 100S to specify the extinction position of the first region 110 and the second region 120. Then, the first slow axis A110 of the first region 110 and the second slow axis A120 of the second region 120 in the specific cross section 100S can be obtained from the identified extinction position.
  • the first region 110 and the second region 120 are generally thin. Therefore, even when trying to identify the quenching position by observing the specific cross section 100S as described above, the magnification of the polarizing microscope may be insufficient.
  • a large evaluation obtained by cutting the optically anisotropic layer 100 parallel to the in-plane slow axis A1 of the optically anisotropic layer 100 and not parallel to the thickness direction A3.
  • the cross section 100E may be used to measure the first slow axis A110 of the first region 110 and the second slow axis A120 of the second region 120 in the specific cross section 100S.
  • the extinction positions of the first region 110 and the second region 120 are identified by polarization observation of the section including the evaluation cross section 100E. From the identified extinction position, the slow axis A130 of the first region 110 and the slow axis A140 of the second region 120 in the evaluation cross section 100E are obtained. Then, from the slow axis A130 and the slow axis A140 in the evaluation cross section 100E, the first slow axis A110 and the second slow axis A120 in the specific cross section 100S can be obtained by calculation.
  • the first region 110 and the second region 120 of the optically anisotropic layer 100 are formed of the cured product of the liquid crystal composition as described above.
  • the curing of the liquid crystal composition is usually achieved by the polymerization of a polymerizable compound contained in the liquid crystal composition, and therefore, when the liquid crystalline compound has a polymerizability, the liquid crystalline compound is polymerized when the liquid crystal composition is cured. It can.
  • the liquid crystal compound thus polymerized is also included in the liquid crystal compound contained in the cured product of the liquid crystal composition.
  • the alignment state of the molecules of the liquid crystal compound is usually fixed.
  • numerator of a liquid crystal compound is arbitrary in the range from which desired 1st slow axis A110 and 2nd slow axis A120 are obtained.
  • FIG. 4 is a cross-sectional view schematically showing the optically anisotropic layer 100 of the optically anisotropic member 10 according to the first embodiment of the present invention, in order to show an example of the alignment state of the molecules 111 and 121 of the liquid crystal compound. is there.
  • the molecules 111 of the liquid crystal compound contained in the first region 110 of the optically anisotropic layer 100 may have a uniform tilt angle.
  • the tilt angle of the molecules 111 of the liquid crystal compound contained in the first region 110 is such that the first slow axis A110 is in the in-plane direction A6 of the optically anisotropic layer 100 in the specific cross section 100S That is, it corresponds to the angle ⁇ 1 made with respect to the layer plane).
  • the molecules 121 of the liquid crystal compound contained in the second region 120 of the optically anisotropic layer 100 may have a uniform tilt angle.
  • the tilt angle of the molecules 121 of the liquid crystal compound contained in the second region 120 is such that the second slow axis A120 is in the in-plane direction A6 of the optically anisotropic layer 100 in the specific cross section 100S That is, it corresponds to the angle ⁇ 2 made with respect to the layer plane).
  • FIGS. 5 to 7 schematically show the optically anisotropic layer 100 of the optically anisotropic member 10 according to the first embodiment of the present invention, in order to show examples of the alignment states of the molecules 111 and 121 of the liquid crystal compound. It is sectional drawing shown to. As shown in FIGS. 5 to 7, the molecules 111 of the liquid crystal compound and the molecules 121 of the liquid crystal compound contained in the first region 110 and the second region 120 of the optically anisotropic layer 100 have non-uniform tilt angles. It may be. For example, there are orientations in which the tilt angles of the molecules of the liquid crystal compound differ in the thickness direction A3 (for example, Japanese Patent No. 5363022, International Publication No. 2018/173778 (or Japanese Patent Application No.
  • the tilt angles of the molecules 111 of the liquid crystal compound may differ between one side and the other side of the first region 110.
  • the tilt angle of the molecules 121 of the liquid crystal compound may be different between one side and the other side of the second region 120.
  • the combination of the orientation of the first region 110 and the orientation of the second region 120 is arbitrary. For example, as shown in FIG. 5, in the first area 110 and the second area 120, the interface on the side where the tilt angle of the first area 110 is smaller is opposite to the interface on the side where the tilt angle of the second area 120 is smaller. It may be provided in the same direction. Further, for example, as shown in FIG.
  • the first area 110 and the second area 120 have an interface on the side where the tilt angle of the first area 110 is large and an interface on the side where the tilt angle of the second area 120 is large. May be provided in the opposite direction. Furthermore, for example, as shown in FIG. 7, the first area 110 and the second area 120 include an interface on the side where the tilt angle of the first area 110 is small and an interface on the side where the tilt angle of the second area 120 is large. May be provided in the opposite direction. Also, for example, the first region 110 and the second region 120 are provided in such a direction that the interface on the side where the tilt angle of the first region 110 is large and the interface on the side where the tilt angle of the second region 120 is small are opposed. It may be done.
  • an angle formed by the in-plane slow axis (not shown) of the first region 110 and the in-plane slow axis (not shown) of the second region 120 Is usually 0 ° to 5 °, preferably 0 ° to 4 °, more preferably 0 ° to 3 °, particularly preferably 0 ° to 1 °.
  • the in-plane slow axis of the first region 110 and the in-plane slow axis of the second region 120 be parallel or nearly parallel as viewed in the thickness direction A3.
  • the angle between the in-plane slow axis A1 of the optically anisotropic layer 100 and the in-plane slow axis (not shown) of the first region 110 is Usually, it is 0 ° to 5 °, preferably 0 ° to 4 °, more preferably 0 ° to 3 °, particularly preferably 0 ° to 1 °.
  • an angle formed by the in-plane slow axis A1 of the optically anisotropic layer 100 and the in-plane slow axis (not shown) of the second region 120 is viewed in the thickness direction A3.
  • the in-plane slow axis A1 of the optically anisotropic layer 100 and the in-plane slow axis of the first region 110 are generally parallel or nearly parallel.
  • the in-plane slow axis A1 of the optically anisotropic layer 100 and the in-plane slow axis of the second region 120 are generally parallel or nearly parallel.
  • the retardation of the optically anisotropic layer 100 is usually set in an appropriate range depending on the application of the optically anisotropic member 10.
  • the in-plane retardation of the optically anisotropic layer 100 at a measurement wavelength of 550 nm may be 100 nm or more and 180 nm or less.
  • the optically anisotropic layer 100 having such an in-plane retardation in such a range can function as a 1 ⁇ 4 wavelength plate.
  • the in-plane retardation of the optically anisotropic layer 100 capable of functioning as a quarter wavelength plate at a measurement wavelength of 550 nm is preferably 100 nm or more, more preferably 110 nm or more, and particularly preferably 120 nm or more Preferably it is 180 nm or less, More preferably, it is 170 nm or less, Especially preferably, it is 160 nm or less.
  • the in-plane retardation of the optically anisotropic layer 100 at a measurement wavelength of 550 nm may be 240 nm or more and 320 nm or less.
  • the optically anisotropic layer 100 having such an in-plane retardation in such a range can function as a half-wave plate.
  • the in-plane retardation at a measurement wavelength of 550 nm of the optically anisotropic layer 100 capable of functioning as a half-wave plate is preferably 240 nm or more, more preferably 250 nm or more, particularly preferably 260 nm or more
  • it is 320 nm or less, More preferably, it is 310 nm or less, Especially preferably, it is 300 nm or less.
  • the in-plane retardation of the optically anisotropic layer 100 may be reverse wavelength dispersion or may be forward wavelength dispersion.
  • In-plane retardation of reverse wavelength dispersion means in-plane retardation in which in-plane retardation Re (450) at a wavelength of 450 nm and in-plane retardation Re (550) at a wavelength of 550 nm satisfy the following formula (N3) .
  • the in-plane retardation of normal wavelength dispersion refers to the in-plane retardation in which the in-plane retardations Re (450) and Re (550) satisfy the following formula (N4).
  • the in-plane retardation of the optically anisotropic layer 100 is preferably reverse wavelength dispersion.
  • the in-plane retardation of the first region 110 is preferably a predetermined value or more.
  • the in-plane retardation of the first region 110 is larger than a predetermined value, it is given to the light transmitted through the optically anisotropic layer 100 twice in the inclination direction A4 of the polar angle “+ ⁇ ” and the polar angle “ ⁇ ”.
  • the retardation and the retardation given to the light transmitted through the optically anisotropic layer 100 twice in the thickness direction A3 can be made closer to each other.
  • the in-plane retardation of the first region 110 at a measurement wavelength of 550 nm is usually 30 nm or more.
  • the in-plane retardation of the first region 110 is more preferably in a more appropriate range.
  • the in-plane retardation of the first region 110 at a measurement wavelength of 550 nm is preferably 30 nm or more, more preferably Is 40 nm or more, particularly preferably 50 nm or more.
  • the first region 110 has such a large in-plane retardation, light transmitted through the optically anisotropic layer 100 twice in the inclination direction A4 of the polar angle “+ ⁇ ” and the polar angle “ ⁇ ”. And the retardation given to the light transmitted twice in the thickness direction A3 in the thickness direction A3 can be made closer to each other.
  • the upper limit of the in-plane retardation of the first region 110 at a measurement wavelength of 550 nm can be set so that the in-plane retardation of the optically anisotropic layer 100 can be contained in a desired range, preferably 120 nm or less, more preferably 110 nm or less , Particularly preferably 95 nm or less.
  • the in-plane retardation of the first region 110 at a measurement wavelength of 550 nm is preferably 60 nm or more, more preferably Is 80 nm or more, particularly preferably 100 nm or more.
  • the first region 110 has such a large in-plane retardation, light transmitted through the optically anisotropic layer 100 twice in the inclination direction A4 of the polar angle “+ ⁇ ” and the polar angle “ ⁇ ”.
  • the retardation given to the light transmitted twice in the thickness direction A3 in the thickness direction A3 can be made closer to each other.
  • the upper limit of the in-plane retardation of the first region 110 at a measurement wavelength of 550 nm can be set so that the in-plane retardation of the optically anisotropic layer 100 can be contained in a desired range, preferably 240 nm or less, more preferably 220 nm or less , Particularly preferably 190 nm or less.
  • the in-plane retardation of the first region 110 may be reverse wavelength dispersive or forward wavelength dispersive. Among them, from the viewpoint of obtaining the optically anisotropic layer 100 having reverse wavelength dispersive in-plane retardation, the in-plane retardation of the first region 110 is preferably reverse wavelength dispersive.
  • the in-plane retardation of the second region 120 is preferably a predetermined value or more.
  • the in-plane retardation of the second region 120 is larger than a predetermined value, it is given to light transmitted through the optically anisotropic layer 100 twice in the inclination direction A4 of the polar angle “+ ⁇ ” and the polar angle “ ⁇ ”.
  • the retardation and the retardation given to the light transmitted through the optically anisotropic layer 100 twice in the thickness direction A3 can be made closer to each other.
  • the in-plane retardation of the second region 120 at a measurement wavelength of 550 nm is usually 30 nm or more.
  • the in-plane retardation of the second region 120 is more preferably in a more appropriate range depending on the in-plane retardation of the optically anisotropic layer 100.
  • the in-plane retardation of the second region 120 at a measurement wavelength of 550 nm is preferably in the same range as the range of the in-plane retardation of the first region 110 at a measurement wavelength of 550 nm.
  • both the in-plane retardation of the first region 110 and the in-plane retardation of the second region 120 are in the same range as described for the in-plane retardation of the first region 110 at a measurement wavelength of 550 nm. Is preferred.
  • the in-plane retardation of the second region 120 may be reverse wavelength dispersive or forward wavelength dispersive. Among them, from the viewpoint of obtaining the optically anisotropic layer 100 having reverse wavelength dispersive in-plane retardation, the in-plane retardation of the second region 120 is preferably reverse wavelength dispersive.
  • the difference between the in-plane retardation of the first region 110 and the in-plane retardation of the second region 120 is preferably small at a measurement wavelength of 550 nm. Specifically, the difference is preferably 100 nm or less, more preferably 50 nm or less, still more preferably 30 nm or less, and particularly preferably 10 nm or less.
  • the retardation given to the light transmitted twice through the optical anisotropic layer 100 in the inclination direction A4 of the polar angle “+ ⁇ ” and the polar angle “ ⁇ ”, and the optically anisotropic layer The retardation given to the light which transmits 100 twice in the thickness direction A3 can be closer to each other.
  • the average retardation ratio R ( ⁇ 50 °) / R (0 °) of the optically anisotropic layer 100 measured in the measurement direction can be close to 1.00.
  • the average retardation ratio R ( ⁇ 50 °) / R (0 °) is preferably 0.90 or more, more preferably 0.95 or more, and preferably 1.10 or less. And more preferably 1.05 or less.
  • R ( ⁇ 50 °) means an average value of retardations R ( ⁇ 50 °) and R (+ 50 °) of the optically anisotropic layer 100 at incident angles corresponding to polar angles of ⁇ 50 ° and + 50 °. Represent. Further, R (0 °) represents the retardation of the optically anisotropic layer 100 at an incident angle of 0 °.
  • the polarization direction of the polarizing plate including the optically anisotropic member 10 is inclined. Reflection of external light in the vehicle can be effectively suppressed. Specifically, while external light passes through the optically anisotropic layer 100 twice during incident and reflection, its polarization state is appropriately converted to realize effective blocking by the linear polarizer of the polarizing plate.
  • such an optical anisotropic member 10 can exhibit the reflection suppressing ability by the polarizing plate in a wide incident angle range when it is obtained in combination with a linear polarizer, so that particularly excellent viewing angle characteristics can be obtained. You can get it.
  • the average retardation ratio R ( ⁇ 50 °) / R (0 °) measured in the measurement direction perpendicular to the in-plane slow axis A1 of the optically anisotropic layer 100 and the optical anisotropy Both average retardation ratios R ( ⁇ 50 °) / R (0 °) measured in the measuring direction perpendicular to the in-plane fast axis A2 of the layer 100 are in the above-mentioned range close to 1.00 Is preferred.
  • the average retardation ratio R ( ⁇ 50 °) / R (0 °) of the optically anisotropic layer 100 is at least minimal in the measurement direction of the direction perpendicular to the in-plane slow axis A1 of the optically anisotropic layer 100 One of the largest and the other of the smallest or largest in the measurement direction of the direction perpendicular to the in-plane fast axis A 2 of the optically anisotropic layer 100.
  • the average retardation ratio R ( ⁇ 50 °) of the optically anisotropic layer 100 in both the measurement direction perpendicular to the in-plane slow axis A1 and the measurement direction perpendicular to the in-plane phase advance axis A2 If / R (0 °) is in the range close to 1.00, the average retardation ratio R ( ⁇ 50 °) / R (0 °) of the optically anisotropic layer 100 is set to 1.00 in all orientations. It can be close. Therefore, particularly excellent viewing angle characteristics can be achieved.
  • the thickness of the first region 110 and the thickness of the second region 120 are each independently preferably 0.1 ⁇ m or more, more preferably 0.3 ⁇ m or more, preferably 9 ⁇ m or less, more preferably 5 ⁇ m or less.
  • characteristics such as in-plane retardation can be easily adjusted to a desired range.
  • the thickness of the optically anisotropic layer 100 is preferably 0.5 ⁇ m or more, more preferably 1.0 ⁇ m or more, preferably 200 ⁇ m or less, more preferably 100 ⁇ m or less. Since the optically anisotropic layer 100 having such a thickness is thinner than the conventional retardation film used for the polarizing plate for the reflection suppression film of the organic EL display panel, it can contribute to thinning of the organic EL display panel .
  • the optically anisotropic member 10 preferably has excellent transparency. Specifically, the total light transmittance of the optically anisotropic member 10 is preferably 80% or more, more preferably 85% or more, and particularly preferably 88% or more. The haze of the optically anisotropic member 10 is preferably 5% or less, more preferably 3% or less, and particularly preferably 1% or less. The total light transmittance can be measured in the wavelength range of 400 nm to 700 nm using an ultraviolet and visible spectrometer. In addition, the haze can be measured using a haze meter.
  • the shape of the optically anisotropic member 10 is arbitrary, but is preferably in the form of a film. In this case, since the optically anisotropic layer 100 has in-plane retardation, the optically anisotropic member 10 can be used as a retardation film.
  • the optically anisotropic member 10 is (I) preparing a layer formed of a liquid crystal composition containing a liquid crystal compound (hereinafter sometimes referred to as “liquid crystal composition layer” as appropriate); (Ii) bonding the liquid crystal composition layer together; (Iii) curing the bonded liquid crystal composition layer; Can be manufactured by a manufacturing method including
  • a liquid crystal composition layer is usually formed by a liquid crystal composition on a suitable support surface.
  • the supporting surface any surface capable of supporting the liquid crystal composition layer can be used. From the viewpoint of improving the surface state of the optically anisotropic layer, it is preferable to use a flat surface free of concave and convex portions as the support surface. Further, from the viewpoint of enhancing the productivity of the optically anisotropic layer, it is preferable to use the surface of a long base material as the support surface.
  • “long” refers to a shape having a length of 5 or more times the width, preferably 10 or more times the length, and specifically wound in a roll. It refers to the shape of a film having a length that can be stored or transported.
  • a base material usually, a resin film or a glass plate is used. In particular, when the orientation treatment is performed at a high temperature, it is preferable to select a substrate that can withstand the temperature.
  • a thermoplastic resin is used. Among them, a resin having a positive intrinsic birefringence value is preferable as the resin from the viewpoint of the height of alignment control force, the height of mechanical strength, and the cost reduction. Furthermore, it is preferable to use a resin containing an alicyclic structure-containing polymer such as a norbornene-based resin because it is excellent in transparency, low hygroscopicity, dimensional stability and lightness.
  • a resin containing an alicyclic structure-containing polymer such as a norbornene-based resin because it is excellent in transparency, low hygroscopicity, dimensional stability and lightness.
  • the surface of the base material as the support surface is subjected to a treatment for imparting an alignment regulating force.
  • the alignment control force refers to the surface property which can align the molecules of the liquid crystal compound contained in the liquid crystal composition.
  • the treatment for applying the alignment control force to the support surface include photo alignment treatment, rubbing treatment, alignment film formation treatment, ion beam alignment treatment, and stretching treatment.
  • the liquid crystal composition is usually prepared in a fluid state. Therefore, the liquid crystal composition is usually coated on the support surface to form a liquid crystal composition layer.
  • a method of applying the liquid crystal composition for example, curtain coating method, extrusion coating method, roll coating method, spin coating method, dip coating method, bar coating method, spray coating method, slide coating method, print coating method, gravure Coating methods, die coating methods, gap coating methods, and dipping methods can be mentioned.
  • a step (iv) of orienting the molecules of the liquid crystal compound contained in the liquid crystal composition layer may be carried out, if necessary.
  • the liquid crystal composition layer is usually kept at a predetermined temperature condition for a predetermined time. Thereby, the molecules of the liquid crystal compound are aligned in the liquid crystal composition layer.
  • the molecules of the liquid crystal compound are aligned in a direction according to the alignment regulating force of the support surface.
  • the conditions are appropriate, in the thickness direction, the molecules of the liquid crystal compound are oriented such that at least a part is inclined to the in-plane direction (that is, to the layer plane).
  • the composition of the liquid crystal composition there is a method of appropriately adjusting the composition of the liquid crystal composition, and alignment such that the molecules of the liquid crystal compound are inclined to the in-plane direction (that is, relative to the layer plane).
  • Japanese Patent No. 5363022 International Publication No. 2018/173778 (or Japanese Patent Application No. 2017-060122), Japanese Patent Laid-Open No. 2018-163218 (or Japanese Patent Application No. 2017-059327), The methods described in 2018-162379 (or Japanese Patent Application No. 2017-060154) and International Publication No. 2018 / 173,773 (or Japanese Patent Application No. 2017-060159) may be applied.
  • the above-mentioned orientation is performed such that the temperature condition of the liquid crystal composition layer is the same as the temperature condition at which the residual viscosity of the test composition is 800 cp (centipoise) or less.
  • the above-mentioned test composition is a composition having a composition in which the polymerization initiator is removed from the liquid crystal composition. Further, the residual viscosity of the test composition is the viscosity of the residual component of the test composition under the same temperature conditions as the liquid crystal composition layer at the time of alignment.
  • the residual component of the test composition is a component among the components contained in the test composition which remains without being vaporized under the same temperature conditions as the liquid crystal composition layer at the time of alignment.
  • the molecules of the liquid crystal compound contained in the liquid crystal composition layer are oriented so as to be greatly inclined with respect to the in-plane direction (that is, with respect to the layer plane).
  • the residual viscosity of the test composition under the same temperature conditions as the liquid crystal composition layer at the time of alignment can be measured by the following method.
  • a test composition in which the polymerization initiator is removed from the liquid crystal composition is prepared.
  • the test composition is concentrated under reduced pressure on a rotary evaporator to remove the solvent and obtain the remaining components.
  • the viscosity of this residual component is measured in advance while changing the measurement temperature, and information on the measurement temperature and the viscosity at the measurement temperature is obtained.
  • this information is appropriately referred to as "temperature-viscosity information”. From this “temperature-viscosity information”, the viscosity at the temperature of the liquid crystal composition layer at the time of alignment is read as the residual viscosity.
  • the temperature of the liquid crystal composition layer is raised to a sufficiently high temperature to lower the residual viscosity of the test composition under the same temperature condition as this temperature, and adjust the temperature to the above-mentioned range.
  • the time for keeping the temperature of the liquid crystal composition layer at a predetermined temperature condition can be set arbitrarily within a range where the desired optically anisotropic layer 100 can be obtained. It may be for 30 seconds to 5 minutes.
  • a liquid crystal composition layer is prepared, and if necessary, the molecules of the liquid crystal compound are aligned, and then the step (ii) of bonding the liquid crystal composition layer is performed.
  • bonding of a liquid crystal composition layer is performed directly.
  • directly bonding of the liquid crystal composition layer means that there is no other layer between the liquid crystal composition layers to be bonded.
  • the liquid crystal composition layer may be bent and bonded.
  • the liquid crystal composition layer on one side of the fold corresponds to the first region 110
  • the liquid crystal composition layer on the other side of the fold corresponds to the second region 120.
  • those liquid crystal composition layers may be bonded.
  • at least one liquid crystal composition layer corresponds to the first region 110
  • another at least one liquid crystal composition layer corresponds to the second region 120.
  • the liquid crystal composition layer is cured to perform the step (iii) of obtaining the optically anisotropic layer 100 as a liquid crystal cured layer.
  • this step (iii) usually, a part or all of the liquid crystal compound is polymerized to cure the liquid crystal composition layer.
  • the liquid crystal composition layers are bound to each other at the interface of the bonded liquid crystal composition layers. Therefore, the optically anisotropic layer 100 is obtained as a liquid crystal cured layer including the first region 110 and the second region 120 as the region in which the liquid crystal composition layer is cured.
  • the liquid crystal compound generally polymerizes while maintaining the alignment state of its molecules. Therefore, usually, the alignment state of the liquid crystal compound contained in the liquid crystal composition before polymerization is fixed by the above-mentioned polymerization.
  • the polymerization method a method may be selected that is adapted to the nature of the components contained in the liquid crystal composition.
  • the polymerization method include a method of irradiating active energy rays and a thermal polymerization method. Among them, the method of irradiating active energy rays is preferable because heating is unnecessary and the polymerization reaction can be allowed to proceed at room temperature.
  • the active energy ray to be irradiated may include light such as visible light, ultraviolet light and infrared light, and any energy ray such as electron beam.
  • the temperature at the time of ultraviolet irradiation is preferably below the glass transition temperature of the substrate, preferably 150 ° C. or less, more preferably 100 ° C. or less, and particularly preferably 80 ° C. or less.
  • the lower limit of the temperature during ultraviolet irradiation may be 15 ° C. or higher.
  • the irradiation intensity of ultraviolet rays is preferably 0.1 mW / cm 2 or more, more preferably 0.5 mW / cm 2 or more, preferably 10000 mW / cm 2 or less, more preferably 5000 mW / cm 2 or less.
  • the dose of ultraviolet rays is preferably 0.1 mJ / cm 2 or more, more preferably 0.5 mJ / cm 2 or more, preferably 10000 mJ / cm 2 or less, more preferably 5000 mJ / cm 2 or less.
  • the liquid crystal composition layer included in the optically anisotropic layer 100 is cured at one time, but the mode of curing is not limited to this example.
  • a part of the liquid crystal composition layer corresponding to the first region 110 may be cured first, and a part of the liquid crystal composition layer corresponding to the second region 120 may be cured first.
  • the manufacturing method may be carried out.
  • the “first unit It is called “hardened layer”.
  • the aspect of forming another layer on the surface of a certain layer means “directly” that there is no other layer between these two layers.
  • step (v) generally, a step of forming a liquid crystal composition layer with a liquid crystal composition on an appropriate support surface, a step of orienting molecules of a liquid crystal compound contained in the liquid crystal composition layer as needed, a liquid crystal composition Curing the product layer to obtain a first unit cured layer.
  • Specific operations in these steps can be the same as steps (i), (iv) and (iii) described above.
  • a first unit cured layer formed of the cured product of the liquid crystal composition is obtained.
  • the molecules of the liquid crystal compound contained in the first unit cured layer are usually aligned in one direction in the in-plane direction. Further, the molecules of the liquid crystal compound contained in the first unit cured layer are usually oriented such that at least a portion thereof is inclined with respect to the in-plane direction (that is, with respect to the layer plane) in the thickness direction.
  • the step (vi) of directly forming a liquid crystal composition layer on the surface of the first unit cured layer is performed.
  • a liquid crystal composition layer is prepared as a layer formed on the first unit cured layer.
  • the formation of the liquid crystal composition layer is usually performed by applying the liquid crystal composition to the surface of the first unit cured layer.
  • the coating method may use the same method as described in the step (i).
  • the surface of the first unit cured layer may be subjected to a treatment for giving an alignment control force such as rubbing treatment.
  • alignment regulation is usually performed to properly align the molecules of the liquid crystal compound contained in the liquid crystal composition layer formed on the surface without special treatment. It has power. Therefore, in order to reduce the number of steps and efficiently carry out the production, in the step (vi), it is preferable that the surface of the first unit cured layer is not rubbed.
  • a step (ix) of orienting the molecules of the liquid crystal compound contained in the liquid crystal composition layer may be carried out, if necessary.
  • the specific operation in this step (ix) can be the same as step (iv) described above.
  • the molecules of the liquid crystal compound are aligned in the liquid crystal composition layer.
  • the molecules of the liquid crystal compound contained in the liquid crystal composition layer are aligned with the liquid crystal compound contained in the first unit cured layer by the alignment regulating force of the surface of the first unit cured layer. Orient in the same direction as the direction.
  • the molecules of the liquid crystal compound contained in the liquid crystal composition layer are oriented such that at least a part thereof is inclined with respect to the in-plane direction (that is, with respect to the layer plane).
  • the first unit cured layer containing a liquid crystal compound capable of expressing reverse wavelength dispersive birefringence (hereinafter sometimes referred to as “reverse dispersed liquid crystal compound” as appropriate) is a compound of the first unit cured layer. It can function as an alignment film that causes the molecules of the reverse dispersion liquid crystal compound contained in the liquid crystal composition layer formed on the surface to be largely inclined with respect to the in-plane direction (that is, with respect to the layer plane).
  • a step (vii) of bonding the liquid crystal composition layer is performed.
  • This bonding is usually performed directly.
  • the bonding for example, after preparing an intermediate film comprising a first unit cured layer and a liquid crystal composition layer formed on the first unit cured layer, the intermediate film is bent, It may be pasted together.
  • the first unit cured layer and the liquid crystal composition layer on one side of the fold correspond to the first region 110
  • the first unit cured layer and the liquid crystal composition layer on the other side of the fold are the second region. It corresponds to 120.
  • the first unit cured layer and the liquid crystal composition layer of one intermediate film correspond to the first region 110, and the first unit cured layer and the liquid crystal composition layer of the other intermediate film form the second region 120. It corresponds.
  • the liquid crystal composition layer is cured to perform the step (viii) of obtaining the optically anisotropic layer 100 as a liquid crystal cured layer.
  • the liquid crystal composition layer formed on the first unit cured layer in order to distinguish the layer formed by curing the liquid crystal composition layer formed on the first unit cured layer from the entire liquid crystal cured layer as the optically anisotropic layer 100 and the first unit cured layer. And may be referred to as a "second unit cured layer" as appropriate.
  • the specific operation in this step (viii) can be the same as in step (iii). Thereby, the liquid crystal composition layers are bound to each other at the interface of the liquid crystal composition layer.
  • a first region 110 as a layer including a first unit cured layer and a second unit cured layer
  • a second region 120 as a layer including a first unit cured layer and a second unit cured layer
  • the optically anisotropic layer 100 is obtained as a liquid crystal hardening layer containing.
  • the optically anisotropic layer 100 can be obtained by the above manufacturing method. Therefore, the optically anisotropic body 10 can be obtained by the method including manufacturing the optically anisotropic layer 100 by the manufacturing method described above. This manufacturing method may further include an optional step in combination with the steps described above.
  • an optical anisotropic member 10 containing a substrate is generally obtained. Therefore, for example, the manufacturing method described above may include the step of peeling the substrate. Thereby, the optically anisotropic layer 100 itself can be obtained as the optically anisotropic member 10.
  • the manufacturing method mentioned above may include the process of transcribe
  • the manufacturing method mentioned above may include the process of providing further arbitrary layers in the obtained optical anisotropic body 10, for example.
  • optically anisotropic member 10 including the optically anisotropic layer 100 formed only of the cured product of the liquid crystal composition has been described.
  • the optically anisotropic member includes only the cured product of the liquid crystal composition It is not limited to.
  • the embodiment will be described by way of an example.
  • FIG. 8 is a perspective view schematically showing an optical anisotropic member 20 according to a second embodiment of the present invention.
  • FIG. 9 is a cross-sectional view schematically showing an optically anisotropic layer 200 of the optically anisotropic member 20 according to the second embodiment of the present invention.
  • the optically anisotropic layer 200 is formed of a liquid crystal composition between the first region 110 and the second region 120.
  • the optical anisotropic member 10 according to the first embodiment is provided in the same manner as that of the first embodiment except that the non-liquid crystal region 230 formed of a material other than a cured product is included.
  • the first region 110, the second region 120, and the non-liquid crystal region 230 are layered regions extending in parallel to the in-plane direction A6 of the optically anisotropic layer 200 (that is, parallel to the layer plane).
  • the first region 110, the second region 120, and the non-liquid crystal region 230 are at different positions in the thickness direction A 3 of the optically anisotropic layer 200.
  • Such an optical anisotropic member 20 has the same characteristics as the optical anisotropic member 10 according to the first embodiment, and can exhibit the same effects as the optical anisotropic member 10 according to the first embodiment.
  • the material of the non-liquid crystal region 230 examples include glass, resin, and the like. Also, the material of the non-liquid crystal region 230 may be one type or two or more types. Among them, the material of the non-liquid crystal region 230 is preferably a resin, and in particular, a resin used as an adhesive or an adhesive is preferable. By using these pressure-sensitive adhesives or adhesives, the production of the optically anisotropic member 20 can be easily performed.
  • the first area 110 and the second area 120 are distinguished and observed.
  • the first region 110 and the non-liquid crystal region 230 are distinguished and observed, and the second region 120 and the non-liquid crystal region 230 are separately distinguished and observed.
  • the first area 110 and the second area 120 are observed separately.
  • the second region 120 may be described by showing an example in which one or both of the retardation and the slow axis are different. In this case, even if the retardation and the slow axis are the same between the first region 110 and the second region 120, the first region 110 and the second region 120 are distinguished and observed.
  • the non-liquid crystal region 230 may be an optical anisotropic region having in-plane retardation, or may be an optical isotropic region having substantially no in-plane retardation. Among them, the non-liquid crystal region 230 is preferably an optical isotropic region.
  • the specific in-plane retardation of the non-liquid crystal region 230 at a measurement wavelength of 550 nm is preferably 10 nm or less, more preferably 5 nm or less, particularly preferably 3 nm or less It is. Thereby, when a polarizing plate is obtained by combining the optical anisotropic member 20 with a linear polarizer, the viewing angle characteristics can be particularly effectively improved.
  • the optical anisotropic body 20 provided with the non-liquid crystal region 230 formed of a pressure sensitive adhesive or an adhesive is (X) preparing a cured liquid crystal layer formed of a cured product of a liquid crystal composition containing a liquid crystal compound; (Xi) bonding the liquid crystal cured layer together, Can be manufactured by a manufacturing method including
  • step (x) generally, a step of forming a liquid crystal composition layer with a liquid crystal composition on an appropriate support surface, a step of orienting molecules of a liquid crystal compound contained in the liquid crystal composition layer as needed, a liquid crystal composition Curing the product layer to obtain a liquid crystal cured layer.
  • Specific operations in these steps can be the same as steps (i), (iv) and (iii) described in the first embodiment.
  • a liquid crystal cured layer formed of the cured product of the liquid crystal composition is obtained.
  • the molecules of the liquid crystal compound contained in the liquid crystal cured layer are usually aligned in one direction in the in-plane direction. Further, the molecules of the liquid crystal compound contained in the liquid crystal cured layer are usually oriented such that at least a portion thereof is inclined with respect to the in-plane direction (that is, with respect to the layer plane) in the thickness direction.
  • step (x) a step of preparing a first unit cured layer, a step of directly forming a liquid crystal composition layer on the surface of the first unit cured layer, and, if necessary, a liquid crystal composition layer
  • the first slow axis A110 is obtained. It is possible to easily obtain an optically anisotropic layer 200 in which the angles ⁇ 1 and ⁇ 2 formed by the second slow axis A120 with respect to the in-plane direction A6 (that is, with respect to the layer plane) are large.
  • the step of bonding the liquid crystal cured layer is performed. This bonding is performed using an adhesive or a pressure-sensitive adhesive.
  • the liquid crystal cured layer may be bent and bonded.
  • a first region 110 as a cured liquid crystal layer on one side of the fold
  • a second region 120 as a cured liquid crystal layer on the other side of the fold
  • an adhesive or pressure sensitive adhesive layer therebetween The optically anisotropic layer 200 including the non-liquid crystal region 230 is obtained.
  • those liquid crystal cured layers may be bonded.
  • a first region 110 as at least one liquid crystal curing layer
  • a second region 120 as another at least one liquid crystal curing layer
  • a non-liquid crystal region as a layer of an adhesive or pressure sensitive adhesive between them.
  • the optically anisotropic layer 200 provided with 230 is obtained.
  • the optically anisotropic layer 200 can be obtained by the manufacturing method as described above. Therefore, the optically anisotropic body 20 can be obtained by the method including manufacturing the optically anisotropic layer 200 by the above-described manufacturing method. This manufacturing method may further include an optional step in combination with the steps described above. As an arbitrary process, the process demonstrated by 1st embodiment is mentioned, for example.
  • the optically anisotropic member may be further modified from the first and second embodiments described above.
  • the liquid crystal cured layer including only the first region 110 and the second region 120 is used as the optically anisotropic layer 100 is shown.
  • the liquid crystal cured layer as the optically anisotropic layer 100 May be combined with the first area 110 and the second area 120 to include any area.
  • region which the liquid crystal cured layer as the optically anisotropic layer 100 may contain the area
  • optically anisotropic layers 100 and 200 provided with only one set of the first region 110 and the second region 120 has been shown, but, for example, one optical The anisotropic layers 100 and 200 may include two or more sets of the first region 110 and the second region 120.
  • the optically anisotropic bodies 10 and 20 may be combined with the optically anisotropic layers 100 and 200 and further include optional layers.
  • an optional layer for example, a substrate used for producing the optically anisotropic layers 100 and 200, a retardation film, a mat layer which improves the slipperiness of the film, a hard coat layer such as an impact resistant polymethacrylate resin layer; Antireflection layer; Antifouling layer; and the like.
  • the liquid crystal composition is a material containing a liquid crystal compound.
  • the liquid crystal composition includes not only materials containing two or more components but also materials containing only one liquid crystal compound.
  • the first region and the second region of the optically anisotropic layer are formed by the cured product of the liquid crystal composition.
  • the liquid crystal composition used to form the first region and the liquid crystal composition used to form the second region may be the same or different. Therefore, the component such as the liquid crystal compound contained in the first region and the component such as the liquid crystal compound contained in the second region may be the same or different.
  • the liquid crystal composition used to form the plurality of layers is , May be the same or different. Therefore, the components such as liquid crystal compounds contained in the plurality of layers may be the same or different.
  • the liquid crystal compound is a compound having liquid crystallinity, and can usually exhibit a liquid crystal phase when the liquid crystal compound is aligned.
  • the liquid crystal compound preferably has a polymerizability. Therefore, in the liquid crystal compound, the molecule preferably contains a polymerizable group such as an acryloyl group, a methacryloyl group, and an epoxy group.
  • a polymerizable liquid crystal compound can be polymerized in a liquid crystal phase, and can be a polymer while maintaining the alignment state of molecules in the liquid crystal phase. Therefore, in the cured product of the liquid crystal composition, it is possible to fix the alignment state of the liquid crystal compound or to increase the degree of polymerization of the liquid crystal compound to increase the mechanical strength of the optically anisotropic layer.
  • the molecular weight of the liquid crystal compound is preferably 300 or more, more preferably 500 or more, particularly preferably 800 or more, preferably 2000 or less, more preferably 1700 or less, particularly preferably 1500 or less.
  • the coatability of the liquid crystal composition can be made particularly good.
  • the birefringence ⁇ n of the liquid crystal compound at a measurement wavelength of 550 nm is preferably 0.01 or more, more preferably 0.03 or more, preferably 0.15 or less, more preferably 0.10 or less.
  • the birefringence of the liquid crystal compound can be measured, for example, by the following method. A layer of liquid crystal compound is produced, and the liquid crystal compound contained in the layer is homogeneously aligned. Thereafter, the in-plane retardation of the layer is measured. Then, the birefringence of the liquid crystal compound can be determined from “(in-plane retardation of layer) / (thickness of layer)”. Under the present circumstances, in order to make measurement of in-plane retardation and thickness easy, you may harden the layer of the liquid crystal compound which carried out homogeneous orientation.
  • the liquid crystal compounds may be used alone or in combination of two or more at an arbitrary ratio.
  • a reverse dispersion liquid crystal compound capable of expressing reverse wavelength dispersion birefringence may be used, or a forward dispersion liquid crystal compound capable of expressing forward wavelength dispersion birefringence may be used.
  • a combination of a reverse dispersion liquid crystal compound and a normal dispersion liquid crystal compound may be used.
  • a liquid crystal compound capable of expressing reverse wavelength dispersive birefringence forms a layer of the liquid crystal compound, and a liquid crystal exhibiting reverse wavelength dispersive birefringence when the liquid crystal compound is aligned in the layer Sex compound.
  • a liquid crystal compound capable of expressing forward wavelength dispersive birefringence forms a layer of the liquid crystal compound, and when the liquid crystal compound is aligned in the layer, it exhibits birefringence of forward wavelength dispersion.
  • Liquid crystal compound when the liquid crystal compound is homogeneously aligned, the liquid crystal compound exhibits reverse wavelength dispersion by examining whether the layer of the liquid crystal compound exhibits reverse wavelength dispersion or forward wavelength dispersion birefringence. It is possible to confirm which of the birefringence and the forward wavelength dispersion develops.
  • the liquid crystal compound is homogeneously aligned to form a layer containing the liquid crystal compound, and the direction of the maximum refractive index in the refractive index ellipsoid of the molecules of the liquid crystal compound in that layer is the layer plane of the layer. It refers to orienting in one parallel direction.
  • a reverse dispersion liquid crystal compound is preferable as the liquid crystal compound from the viewpoint of realizing a polarizing plate capable of exhibiting the reflection suppressing ability in a wide wavelength range.
  • the birefringence of the reverse dispersion liquid crystal compound is, in the refractive index ellipsoid of the molecule of the reverse dispersion liquid crystal compound, the refractive index in the direction showing the maximum refractive index and the refractive index in the other direction intersecting this direction Expressed as a difference. Further, depending on the molecular structure of the reverse dispersion liquid crystal compound, the wavelength dispersion of the refractive index in each direction may be different.
  • the refractive index measured at the long wavelength is smaller than the refractive index measured at the short wavelength, but the difference between them is small.
  • the refractive index measured at the long wavelength is smaller than the refractive index measured at the short wavelength, and the difference between them is large.
  • the refractive index difference between the directions in such an example is small when the measurement wavelength is short, and is large when the measurement wavelength is long. As a result, it is possible to express reverse wavelength dispersive birefringence.
  • Examples of the reverse dispersion liquid crystal compound include those represented by the following formula (I).
  • Ar represents a group represented by any of the following formulas (II-1) to (II-7).
  • * represents a bonding position to Z 1 or Z 2 .
  • E 1 and E 2 are each independently —CR 11 R 12 —, —S—, —NR 11 —, —CO— and — It represents a group selected from the group consisting of O-.
  • R 11 and R 12 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Among them, E 1 and E 2 are preferably each independently —S—.
  • D 1 to D 3 each independently represent an aromatic hydrocarbon ring group which may have a substituent, or a substituent Represents an aromatic heterocyclic group which may be possessed.
  • the carbon atom number (including the carbon atom number of the substituent) of the group represented by D 1 to D 3 is generally independently 2 to 100.
  • the number of carbon atoms of the aromatic hydrocarbon ring group in D 1 to D 3 is preferably 6 to 30.
  • Examples of the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D 1 to D 3 include a phenyl group and a naphthyl group. Among them, as an aromatic hydrocarbon ring group, a phenyl group is more preferable.
  • the aromatic hydrocarbon ring group in D 1 to D 3 may have, for example, a halogen atom such as a fluorine atom and a chlorine atom; a cyano group; a carbon atom such as a methyl group, an ethyl group and a propyl group
  • a halogen atom such as a fluorine atom and a chlorine atom
  • a cyano group such as a carbon atom such as a methyl group, an ethyl group and a propyl group
  • R a represents an alkyl group having 1 to 6 carbon atoms; and an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms as a substituent, having 6 carbon atoms And a group selected from the group consisting of -20 aromatic hydrocarbon ring groups;
  • R b is an alkyl group having 1 to 20 carbon atoms which may have a substituent; an alkenyl group having 2 to 20 carbon atoms which may have a substituent; even if it has a substituent And a group selected from the group consisting of a good cycloalkyl group having 3 to 12 carbon atoms; and an aromatic hydrocarbon ring group having 6 to 12 carbon atoms which may have a substituent.
  • the number of carbon atoms of the alkyl group having 1 to 20 carbon atoms for R b is preferably 1 to 12, and more preferably 4 to 10.
  • a C1-C20 alkyl group in R b for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, 1-methylpentyl group, 1-ethylpentyl group , Sec-butyl group, t-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group, isohexyl group, n-heptyl group, n-octyl group, n-nonyl group, n-decyl group , N-undecyl group, n-dodecyl group, n-tridecyl group, n-tetradecyl group
  • the substituent which the alkyl group having 1 to 20 carbon atoms for R b may have is, for example, a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; a dimethylamino group or the like; N, N-dialkylamino group; an alkoxy group having 1 to 20 carbon atoms such as methoxy, ethoxy, isopropoxy and butoxy; and C 1 to 12 having carbon atoms such as methoxymethoxy and methoxyethoxy An alkoxy group substituted with an alkoxy group; an alkoxy group having 1 to 12 carbon atoms; a nitro group; an aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as a phenyl group and a naphthyl group; Aromatic heterocyclic groups having 2 to 20 carbon atoms such as thienyl group, thiazolyl group and benzothiazol-2-ylthio group; cyclopropy
  • the number of carbon atoms of the alkenyl group having 2 to 20 carbon atoms for R b is preferably 2 to 12.
  • a C2-C20 alkenyl group in R b for example, a vinyl group, propenyl group, isopropenyl group, butenyl group, isobutenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, decenyl group, undecenyl group And dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group, nonadecenyl group, icosenyl group and the like.
  • Examples of the substituent which may have an alkenyl group having 2 to 20 carbon atoms in R b include the same examples as the substituent group which may have an alkyl group having 1 to 20 carbon atoms in R b.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • Examples of the cycloalkyl group having 3 to 12 carbon atoms as R b include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cyclooctyl group. Among them, as a cycloalkyl group, a cyclopentyl group and a cyclohexyl group are preferable.
  • the substituent that the cycloalkyl group having 3 to 12 carbon atoms for R b may have is, for example, a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; a cyano group; a dimethylamino group or the like N, N-dialkylamino groups; alkyl groups having 1 to 6 carbon atoms, such as methyl, ethyl and propyl; and alkoxy having 1 to 6 carbon atoms, such as methoxy, ethoxy and isopropoxy. And nitro aromatic group, and an aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as phenyl group and naphthyl group.
  • a substituent of the cycloalkyl group a halogen atom such as fluorine atom and chlorine atom; cyano group; an alkyl group having 1 to 6 carbon atoms such as methyl group, ethyl group and propyl group; methoxy group, ethoxy
  • An alkoxy group having 1 to 6 carbon atoms such as a group and isopropoxy group; a nitro group; and an aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as a phenyl group and a naphthyl group are preferable.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • Examples of the aromatic hydrocarbon ring group having 6 to 12 carbon atoms as R b include a phenyl group, a 1-naphthyl group and a 2-naphthyl group. Among them, as an aromatic hydrocarbon ring group, a phenyl group is preferable.
  • the substituent that the aromatic hydrocarbon ring group having 6 to 12 carbon atoms for R b may have is, for example, a halogen atom such as a fluorine atom or a chlorine atom; a carbon atom number such as a cyano group; a dimethylamino group 2 to 12 N, N-dialkylamino group; alkoxy group having 1 to 20 carbon atoms such as methoxy group, ethoxy group, isopropoxy group and butoxy group; carbon atom number such as methoxymethoxy group and methoxyethoxy group An alkoxy group having 1 to 12 carbon atoms substituted with an alkoxy group of 1 to 12; nitro group; an aromatic heterocyclic group having 2 to 20 carbon atoms such as triazolyl group, pyrrolyl group, furanyl group, thiophenyl group, etc .; A cycloalkyl group having 3 to 8 carbon atoms, such as cyclopropyl group, cyclopenty
  • a halogen atom such as a fluorine atom or a chlorine atom
  • a cyano group such as a fluorine atom or a chlorine atom
  • a cyano group such as a fluorine atom or a chlorine atom
  • a cyano group such as a methoxy group, an ethoxy group, an isopropoxy group, a butoxy group, etc.
  • Alkoxy group Alkoxy group; nitro group; aromatic heterocyclic group having 2 to 20 carbon atoms such as furanyl group and thiophenyl group; cycloalkyl group having 3 to 8 carbon atoms such as cyclopropyl group, cyclopentyl group and cyclohexyl group; A fluoroalkyl group having 1 to 12 carbon atoms, in which one or more hydrogen atoms are substituted with a fluorine atom, such as trifluoromethyl group, pentafluoroethyl group, -CH 2 CF 3 and the like; -OCF 3 ; is preferable.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • the number of carbon atoms of the aromatic heterocyclic group in D 1 to D 3 is preferably 2 to 30.
  • Examples of the aromatic heterocyclic group having 2 to 30 carbon atoms in D 1 to D 3 include 1-benzofuranyl group, 2-benzofuranyl group, imidazolyl group, indolinyl group, furazanyl group, oxazolyl group, quinolyl group, and thiadiazolyl group.
  • aromatic heterocyclic group monocyclic aromatic heterocyclic groups such as furanyl group, pyranyl group, thienyl group, oxazolyl group, furazanyl group, thiazolyl group, and thiadiazolyl group; and benzothiazolyl group, benzooxa group Zoryl group, quinolyl group, 1-benzofuranyl group, 2-benzofuranyl group, phthalimido group, benzo [c] thienyl group, benzo [b] thienyl group, thiazolopyridyl group, thiazolopyrazinyl group, benzisoxazolate
  • aromatic heterocyclic groups such as fused rings, such as a ring group, a benzoxadiazolyl group, and a benzothiadiazolyl group.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • D 4 to D 5 each independently represent an acyclic group which may have a substituent. D 4 and D 5 may together form a ring.
  • the carbon atom number (including the carbon atom number of the substituent) of the group represented by D 4 to D 5 is generally independently 1 to 100.
  • the number of carbon atoms of the noncyclic group in D 4 to D 5 is preferably 1 to 13.
  • the above Ph represents a phenyl group.
  • R x represents an organic group having 1 to 12 carbon atoms.
  • R x include an alkoxy group having 1 to 12 carbon atoms, and an alkyl group having 1 to 12 carbon atoms which may be substituted with a hydroxyl group.
  • Examples of the substituent that the noncyclic group in D 4 to D 5 may have include the same examples as the substituents that the aromatic hydrocarbon ring group in D 1 to D 3 may have.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • D 4 and D 5 When D 4 and D 5 are taken together to form a ring, the above-mentioned D 4 and D 5 form an organic group containing a ring.
  • this organic group the group represented by a following formula is mentioned, for example.
  • * represents the position where each organic group is bonded to the carbon to which D 4 and D 5 are bonded.
  • R * represents an alkyl group having 1 to 3 carbon atoms.
  • R ** represents a group selected from the group consisting of an alkyl group having 1 to 3 carbon atoms and a phenyl group which may have a substituent.
  • R *** represents a group selected from the group consisting of an alkyl group having 1 to 3 carbon atoms and a phenyl group which may have a substituent.
  • R **** is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, hydroxyl group, and represents a group selected from the group consisting of -COOR 13.
  • R 13 represents an alkyl group having 1 to 3 carbon atoms.
  • a substituent which a phenyl group may have, for example, a halogen atom, an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, a hydroxyl group, a carboxyl group, an alkoxy group, an aryloxy group, an acyloxy group, a cyano group and an amino group Can be mentioned.
  • a substituent a halogen atom, an alkyl group, a cyano group and an alkoxy group are preferable.
  • the number of substituents which a phenyl group has may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • the carbon atom number (including the carbon atom number of the substituent) of the group represented by D 6 is usually 3 to 100.
  • R f represents a hydrogen atom; and a group selected from the group consisting of an alkyl group having 1 to 6 carbon atoms, such as methyl, ethyl, propyl and isopropyl.
  • R g represents a group selected from the group consisting of a hydrogen atom; and an organic group having 1 to 30 carbon atoms which may have a substituent.
  • the preferable carbon atom number range and examples of the alkyl group having 1 to 20 carbon atoms in R g are the same as the alkyl group having 1 to 20 carbon atoms in R b .
  • the substituent which the alkyl group having 1 to 20 carbon atoms in R g may have is, for example, a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; a dimethylamino group or the like, and the like.
  • N, N-dialkylamino group an alkoxy group having 1 to 20 carbon atoms such as methoxy, ethoxy, isopropoxy and butoxy; and C 1 to 12 having carbon atoms such as methoxymethoxy and methoxyethoxy
  • Alkyl group cycloalkyloxy group having 3 to 8 carbon atoms such as cyclopentyloxy group and cyclohexyloxy group; cyclic having 2 to 12 carbon atoms such as tetrahydrofuranyl group, tetrahydropyranyl group, dioxolanyl group, dioxanyl group and the like
  • An ether group an aryloxy group having 6 to 14 carbon atoms such as phenoxy group and naphthoxy group; a fluoroalkyl group having 1 to 12 carbon atoms in which one or more hydrogen atoms are substituted with a fluorine atom; benzofuryl group; benzopyranyl A benzodioxolyl group; a benzodioxanyl group; -SO 2 R a ; -SR b ; an alkoxy group having 1 to 12 carbon atoms substituted with -SR b ; a hydroxyl group; and the like.
  • the preferable carbon atom number range and examples of the alkenyl group having 2 to 20 carbon atoms in R g are the same as the alkenyl group having 2 to 20 carbon atoms in R b .
  • Examples of the substituent which may have an alkenyl group having 2 to 20 carbon atoms in R g include the same examples as the substituent group which may have an alkyl group having 1 to 20 carbon atoms in R g.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • alkynyl group having 2 to 20 carbon atoms for R g for example, ethynyl group, propynyl group, 2-propynyl group (propargyl group), butynyl group, 2-butynyl group, 3-butynyl group, 3-butynyl group, pentynyl group, 2- And pentynyl group, hexynyl group, 5-hexynyl group, heptynyl group, octynyl group, 2-octynyl group, nonanyl group, decanyl group, 7-decanyl group and the like.
  • Examples of the substituent which may have an alkynyl group having 2 to 20 carbon atoms in R g include the same examples as the substituent group which may have an alkyl group having 1 to 20 carbon atoms in R g.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • Examples of the cycloalkyl group having 3 to 12 carbon atoms in R g include the same examples as the cycloalkyl group having 3 to 12 carbon atoms in R b .
  • Examples of the substituent which may have a cycloalkyl group having 3 to 12 carbon atoms in R g include the same examples as the substituent group which may have an alkyl group having 1 to 20 carbon atoms in R g.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • Examples of the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in R g include the same examples as the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D 1 to D 3 .
  • Examples of the substituent that the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in R g may have include the same examples as the substituents that the aromatic hydrocarbon ring group in D 1 to D 3 may have.
  • Be The number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • Examples of the aromatic heterocyclic group having 2 to 30 carbon atoms in R g include the same examples as the aromatic heterocyclic group having 2 to 30 carbon atoms in D 1 to D 3 .
  • Examples of the substituent that the aromatic heterocyclic group having 2 to 30 carbon atoms in R g may have include the same examples as the substituents that the aromatic hydrocarbon ring group in D 1 to D 3 may have. .
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • R h represents an organic group having at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring having 6 to 30 carbon atoms and an aromatic heterocycle having 2 to 30 carbon atoms.
  • R h include (1) a hydrocarbon ring group having 6 to 40 carbon atoms, which has one or more aromatic hydrocarbon rings having 6 to 30 carbon atoms.
  • the hydrocarbon ring group having an aromatic hydrocarbon ring may be appropriately referred to as “(1) hydrocarbon ring group”.
  • (1) Specific examples of the hydrocarbon ring group include the following groups.
  • the hydrocarbon ring group may have a substituent.
  • R a and R b are as described above. Among these, a halogen atom, a cyano group, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms are preferable.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • R h includes (2) at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring having 6 to 30 carbon atoms and an aromatic heterocyclic ring having 2 to 30 carbon atoms. And heterocyclic groups having 2 to 40 carbon atoms.
  • the heterocyclic group having an aromatic ring may be appropriately referred to as "(2) heterocyclic group”.
  • the following groups may be mentioned as specific examples of the heterocyclic group.
  • Each R independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
  • the heterocyclic group may have a substituent.
  • substituents that the (2) heterocyclic group may have include the same examples as the substituents that the (1) hydrocarbon ring group may have.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • R h (3) at least one group selected from the group consisting of an aromatic hydrocarbon ring group having 6 to 30 carbon atoms and an aromatic heterocyclic group having 2 to 30 carbon atoms And an alkyl group having 1 to 12 carbon atoms substituted by
  • this substituted alkyl group may be appropriately referred to as "(3) substituted alkyl group”.
  • Examples of the “alkyl group having 1 to 12 carbon atoms” in the substituted alkyl group include a methyl group, an ethyl group, a propyl group and an isopropyl group.
  • Examples of the "aromatic hydrocarbon ring group having 6 to 30 carbon atoms” in the substituted alkyl group include the same examples as the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D 1 to D 3 . It can be mentioned.
  • Examples of the “aromatic heterocyclic group having 2 to 30 carbon atoms” in the substituted alkyl group include the same examples as the aromatic heterocyclic group having 2 to 30 carbon atoms in D 1 to D 3 . .
  • the substituted alkyl group may further have a substituent.
  • substituent which the substituted alkyl group may have include the same examples as the substituent which the (1) hydrocarbon ring group may have.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • R h (4) at least one group selected from the group consisting of an aromatic hydrocarbon ring group having 6 to 30 carbon atoms and an aromatic heterocyclic group having 2 to 30 carbon atoms And an alkenyl group having 2 to 12 carbon atoms which is substituted by
  • this substituted alkenyl group may be referred to as “(4) substituted alkenyl group” as appropriate.
  • Examples of the “alkenyl group having 2 to 12 carbon atoms” in the substituted alkenyl group include a vinyl group and an allyl group.
  • Examples of the “aromatic hydrocarbon ring group having 6 to 30 carbon atoms” in the substituted alkenyl group include the same examples as the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D 1 to D 3 . It can be mentioned.
  • Examples of the “aromatic heterocyclic group having 2 to 30 carbon atoms” in the substituted alkenyl group include the same examples as the aromatic heterocyclic group having 2 to 30 carbon atoms in D 1 to D 3 . .
  • the substituted alkenyl group may further have a substituent.
  • a substituent which a substituted alkenyl group may have the same example as a substituent which (1) hydrocarbon ring group may have is mentioned, for example.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • R h (5) at least one group selected from the group consisting of an aromatic hydrocarbon ring group having 6 to 30 carbon atoms and an aromatic heterocyclic group having 2 to 30 carbon atoms And an alkynyl group having 2 to 12 carbon atoms which is substituted by
  • this substituted alkynyl group may be referred to as “(5) substituted alkynyl group” as appropriate.
  • Examples of the “C 2-12 alkynyl group” in the substituted alkynyl group include ethynyl group and propynyl group.
  • Examples of the “aromatic hydrocarbon ring group having 6 to 30 carbon atoms” in the substituted alkynyl group include the same examples as the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D 1 to D 3 . It can be mentioned.
  • Examples of the “aromatic heterocyclic group having 2 to 30 carbon atoms” in the substituted alkynyl group include the same examples as the aromatic heterocyclic group having 2 to 30 carbon atoms in D 1 to D 3 . .
  • the substituted alkynyl group may further have a substituent.
  • substituents that the substituted alkynyl group may have (5) include the same examples as the substituent that the (1) hydrocarbon ring group may have.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • R h More preferable specific examples of R h include the following groups.
  • R h include the following groups.
  • R h described above may further have a substituent.
  • substituents include halogen atoms such as fluorine atom and chlorine atom; cyano group; alkyl group having 1 to 6 carbon atoms such as methyl group, ethyl group and propyl group; vinyl group, allyl group and the like
  • R a and R b are as described above. Among these, a halogen atom, a cyano group, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms are preferable.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • R i represents an organic group having at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring having 6 to 30 carbon atoms and an aromatic heterocyclic ring having 2 to 30 carbon atoms.
  • R i include hydrocarbon ring groups having 6 to 40 carbon atoms, which have one or more aromatic hydrocarbon rings having 6 to 30 carbon atoms.
  • another preferable example of R i has at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring having 6 to 30 carbon atoms and an aromatic heterocyclic ring having 2 to 30 carbon atoms, And heterocyclic groups having 2 to 40 carbon atoms.
  • R i include the following groups.
  • the meaning of R is as described above.
  • the group represented by any one of formulas (II-1) to (II-7) may further have a substituent in addition to D 1 to D 6 .
  • substituents include a halogen atom, a cyano group, a nitro group, an alkyl group having 1 to 6 carbon atoms, a halogenated alkyl group having 1 to 6 carbon atoms, and an N-alkylamino having 1 to 6 carbon atoms.
  • N, N-dialkylamino group having 2 to 12 carbon atoms alkoxy group having 1 to 6 carbon atoms, alkylsulfinyl group having 1 to 6 carbon atoms, carboxyl group, thioalkyl group having 1 to 6 carbon atoms And an N-alkylsulfamoyl group having 1 to 6 carbon atoms, and an N, N-dialkylsulfamoyl group having 2 to 12 carbon atoms.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • Preferred examples of Ar in the formula (I) include groups represented by the following formulas (III-1) to (III-10).
  • the groups represented by the formulas (III-1) to (III-10) may have an alkyl group having 1 to 6 carbon atoms as a substituent.
  • * represents a bonding position.
  • a 1 , A 2 , B 1 and B 2 are each independently a cyclic aliphatic group which may have a substituent, and an aromatic which may have a substituent A group selected from the group consisting of
  • the carbon atom number (including the carbon atom number of the substituent) of the group represented by A 1 , A 2 , B 1 and B 2 is generally independently 3 to 100.
  • each of A 1 , A 2 , B 1 and B 2 independently has a cyclic aliphatic group having 5 to 20 carbon atoms which may have a substituent, or a substituent Preferred are aromatic groups having 2 to 20 carbon atoms.
  • cyclic aliphatic group in A 1 , A 2 , B 1 and B 2 for example, cyclopentane-1,3-diyl group, cyclohexane-1,4-diyl group, 1,4-cycloheptane-1,4 Cycloalkanediyl group having 5 to 20 carbon atoms, such as -diyl group, cyclooctane-1,5-diyl group; decahydronaphthalene-1,5-diyl group, decahydronaphthalene-2,6-diyl group, etc. And a bicycloalkanediyl group having 5 to 20 carbon atoms; and the like.
  • a cycloalkanediyl group having 5 to 20 carbon atoms which may be substituted is preferable, a cyclohexanediyl group is more preferable, and a cyclohexane-1,4-diyl group is particularly preferable.
  • the cyclic aliphatic group may be trans, cis or a mixture of cis and trans. Among them, the trans form is more preferable.
  • Examples of the substituent that the cyclic aliphatic group in A 1 , A 2 , B 1 and B 2 may have include a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, A nitro group, a cyano group, etc. are mentioned.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • Aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as 5-naphthylene group, 2,6-naphthylene group, 4,4′-biphenylene group, etc .; furan-2,5-diyl group, thiophene-2,5 -Aromatic heterocyclic groups having 2 to 20 carbon atoms, such as -diyl, pyridine-2, 5-diyl and pyrazine-2, 5-diyl; and the like.
  • an aromatic hydrocarbon ring group having 6 to 20 carbon atoms is preferable, a phenylene group is more preferable, and a 1,4-phenylene group is particularly preferable.
  • substituent which the aromatic group in A 1 , A 2 , B 1 and B 2 may have, for example, the same as the substituents which the cyclic aliphatic group in A 1 , A 2 , B 1 and B 2 may have An example is given.
  • the number of substituents may be one or more.
  • the plurality of substituents may be identical to or different from one another.
  • Each of R 22 and R 23 independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
  • the hydrogen atom contained in the organic group of G 1 and G 2 may be substituted by an alkyl group of 1 to 5 carbon atoms, an alkoxy group of 1 to 5 carbon atoms, or a halogen atom.
  • Specific examples of the aliphatic hydrocarbon group having 1 to 20 carbon atoms in G 1 and G 2 include an alkylene group having 1 to 20 carbon atoms.
  • Specific examples of the aliphatic hydrocarbon group having 3 to 20 carbon atoms in G 1 and G 2 include an alkylene group having 3 to 20 carbon atoms.
  • P 1 and P 2 each independently represent a polymerizable group.
  • R 31 represents a hydrogen atom, a methyl group or a chlorine atom.
  • the reverse dispersed liquid crystalline compound represented by the formula (I) can be produced, for example, by the reaction of a hydrazine compound and a carbonyl compound described in WO 2012/147904.
  • the liquid crystal composition may contain a surfactant as an optional component.
  • a surfactant containing a fluorine atom in the molecule is preferable as the surfactant.
  • a surfactant containing a fluorine atom in the molecule may be referred to as a "fluorinated surfactant" as appropriate.
  • the surfactant is preferably a nonionic surfactant.
  • the surfactant is a nonionic surfactant which does not contain an ionic group, the surface state and the orientation of the liquid crystal cured layer can be made particularly good.
  • the surfactant may not have the polymerizability, and may have the polymerizability.
  • the polymerizable surfactant can be polymerized in the step of curing the liquid crystal composition layer, and therefore, in the cured product of the liquid crystal composition, it is usually included in a part of the molecules of the polymer.
  • surfactant for example, Surfron series (S420 etc.) manufactured by AGC Seimi Chemical Co., Ltd., Ftergent series manufactured by Neos (251, FTX-212M, FTX-215M, FTX-209 etc.), manufactured by DIC Fluorosurfactants such as Megafuck series (F-444, F-562, etc.) can be mentioned.
  • surfactant may be used individually by 1 type, and may be used combining two or more types by arbitrary ratios.
  • the amount of the surfactant is preferably 0.03 parts by weight or more, more preferably 0.05 parts by weight or more, preferably 0.50 parts by weight or less, more preferably 100 parts by weight of the liquid crystal compound. It is 0.30 parts by weight or less. When the amount of surfactant is in the above-mentioned range, it is possible to obtain a liquid crystal cured layer excellent in orientation.
  • the liquid crystal composition may contain a polymerization initiator as an optional component.
  • the type of polymerization initiator may be selected according to the type of polymerizable compound contained in the liquid crystal composition. For example, if the polymerizable compound is radically polymerizable, a radical polymerization initiator may be used. In addition, if the polymerizable compound is anionically polymerizable, an anionic polymerization initiator may be used. Furthermore, if the polymerizable compound is cationically polymerizable, a cationic polymerization initiator may be used. As the polymerization initiator, one type may be used alone, or two or more types may be used in combination in an arbitrary ratio.
  • the amount of the polymerization initiator is preferably 0.1 parts by weight or more, more preferably 0.5 parts by weight or more, preferably 30 parts by weight or less, more preferably 10 parts by weight, based on 100 parts by weight of the liquid crystal compound. Part or less.
  • the amount of the polymerization initiator falls within the above range, the polymerization can be efficiently advanced.
  • the liquid crystal composition may contain a solvent as an optional component.
  • a solvent those capable of dissolving the liquid crystal compound are preferable.
  • An organic solvent is usually used as such a solvent.
  • the organic solvent include ketone solvents such as cyclopentanone, cyclohexanone, methyl ethyl ketone, acetone and methyl isobutyl ketone; acetic acid ester solvents such as butyl acetate and amyl acetate; halogenated hydrocarbon solvents such as chloroform, dichloromethane and dichloroethane; And ether solvents such as 4-dioxane, cyclopentyl methyl ether, tetrahydrofuran, tetrahydropyran, 1,3-dioxolane and 1,2-dimethoxyethane; and aromatic hydrocarbon solvents such as toluene, xylene and mesitylene.
  • a solvent may be used individually by 1 type, and
  • the boiling point of the solvent is preferably 60 ° C. to 250 ° C., more preferably 60 ° C. to 150 ° C. from the viewpoint of excellent handleability.
  • the amount of the solvent is preferably 200 parts by weight or more, more preferably 250 parts by weight or more, particularly preferably 300 parts by weight or more, preferably 650 parts by weight or less, more preferably 100 parts by weight of the liquid crystalline compound. It is at most 550 parts by weight, particularly preferably at most 450 parts by weight.
  • liquid crystal compositions include, for example, metals; metal complexes; metal oxides such as titanium oxide; colorants such as dyes and pigments; light emitting materials such as fluorescent materials and phosphorescent materials; Thixotropic agents, gelling agents, polysaccharides, UV absorbers, infrared absorbers, antioxidants, ion exchange resins, and the like.
  • the amount of these components may be 0.1 parts by weight to 20 parts by weight with respect to a total of 100 parts by weight of the liquid crystal compound.
  • a polarizing plate can be obtained by using the above-mentioned optical anisotropic material.
  • the polarizer usually comprises an optical anisotropic member and a linear polarizer. It is preferable that the polarizing plate can function as a circularly polarizing plate or an elliptically polarizing plate. Such a polarizing plate can suppress reflection of external light in the front direction of the display surface of the organic EL display panel by being provided in the organic EL display panel.
  • the optically anisotropic layer of the optically anisotropic member has a first region having a first slow axis and a second slow axis inclined with respect to the in-plane direction (that is, relative to the layer plane) in a specific cross section.
  • the birefringence can be appropriately adjusted not only in the in-plane direction but also in the thickness direction.
  • the crossing angle ⁇ between the first slow axis of the first region and the second slow axis of the second region is within an appropriate range.
  • the polarizing plate can suppress the reflection of external light not only in the front direction of the display surface of the organic EL display panel but also in the inclination direction, so that the viewing angle characteristics can be improved.
  • a linear polarizer for example, a film obtained by adsorbing iodine or a dichroic dye to a polyvinyl alcohol film and uniaxially stretching in a boric acid bath; iodine or a dichroic dye is adsorbed to a polyvinyl alcohol film And a film obtained by further stretching and further modifying a part of polyvinyl alcohol units in the molecular chain into polyvinylene units.
  • polarized-light into reflected light and transmitted light such as a grid polarizer and a multilayer polarizer, is mentioned.
  • the linear polarizer a polarizer containing polyvinyl alcohol is preferable.
  • the degree of polarization of this linear polarizer is not particularly limited, it is preferably 98% or more, more preferably 99% or more.
  • the thickness of the linear polarizer is preferably 5 ⁇ m to 80 ⁇ m.
  • the in-plane slow axis of the optically anisotropic layer makes an angle of 45 ° or near with respect to the polarization absorption axis of the linear polarizer as viewed from the thickness direction.
  • the above angle is preferably 45 ° ⁇ 5 ° (ie, 40 ° to 50 °), more preferably 45 ° ⁇ 4 ° (ie, 41 ° to 49 °), and particularly preferably 45 ° ⁇ 3. ° (ie 42 ° to 48 °).
  • the polarizing plate may further contain any layer in addition to the linear polarizer and the optical anisotropic member.
  • any layer for example, an adhesive layer for bonding a linear polarizer and an optically anisotropic material; a polarizer protective film layer for protecting a linear polarizer; and the like can be mentioned.
  • the polarizing plate described above may be provided as a reflection suppression film in an organic EL display panel.
  • Such an organic EL display panel usually includes an organic EL element as a display element, and a polarizing plate is provided on the viewing side of the organic EL element.
  • the polarizing plate is disposed such that an optically anisotropic member is provided between the organic EL element and the linear polarizer.
  • the polarizing plate functions as a circularly polarizing plate as an example.
  • the light incident from the outside of the device becomes circularly polarized light because only a portion of the linearly polarized light passes through the linear polarizer and then passes through the optically anisotropic layer of the optically anisotropic body.
  • Circularly polarized light is reflected by a component (such as a reflective electrode of an organic EL element) that reflects light in the organic EL display panel, and enters linearly polarized light that is incident upon passing through the optically anisotropic layer of the optically anisotropic member again.
  • the vibration direction of linearly polarized light means the vibration direction of an electric field of linearly polarized light.
  • the organic EL device generally includes a transparent electrode layer, a light emitting layer and an electrode layer in this order, and the light emitting layer can generate light when voltage is applied from the transparent electrode layer and the electrode layer.
  • the material which comprises an organic light emitting layer the material of a polypara phenylene vinylene type
  • the light emitting layer may have a stack of a plurality of layers having different emission colors, or a mixed layer in which layers of certain dyes are doped with different dyes.
  • the organic EL element may be provided with functional layers such as a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, an equipotential surface forming layer, and a charge generation layer.
  • the optically anisotropic member may be provided for uses other than the reflection suppression film.
  • the measurement wavelength of retardation was 550 nm unless otherwise stated.
  • the pressure-sensitive adhesive and the optically isotropic resin film used in the following Examples and Comparative Examples have optical isotropy, they do not affect the measurement result of retardation.
  • the heating conditions for aligning the liquid crystal compound contained in the liquid crystal composition layer were all such that the residual viscosity of the test composition corresponding to the liquid crystal composition used was 800 cP or less. Temperature conditions.
  • the optically anisotropic layer was cut so that a specific cross section parallel to both the in-plane slow axis and the thickness direction of the optically anisotropic layer appeared.
  • the section containing the specific cross section which appeared was observed with polarized light in cross nicol using a polarizing microscope.
  • a wave plate was attached to a polarized light microscope as an inspection plate. By this polarization observation, it was confirmed whether the first region and the second region could be distinguished.
  • Viewing angle F The retardation of the optically anisotropic body was measured using a retardation meter ("AxoScan" manufactured by Axometrics, Inc.) at an incident angle in the range of -50 ° to + 50 °.
  • the optically anisotropic member is oriented with its rotation axis parallel to the in-plane slow axis of the optically anisotropic layer so that the measurement direction is perpendicular to the in-plane slow axis of the optically anisotropic layer. I made it rotate to the center.
  • the retardation of the optically anisotropic body was measured using a retardation meter ("AxoScan" manufactured by Axometrics, Inc.) at an incident angle in the range of -50 ° to + 50 °.
  • the optical anisotropic member is centered on a rotation axis parallel to the in-plane phase advance axis of the optical anisotropic body so that the measurement direction is perpendicular to the in-plane phase advance axis of the optical anisotropic body. I made it rotate.
  • Example 1 (Production of liquid crystal composition) 100 parts by weight of a reverse dispersion liquid crystalline compound A having a polymerizing property represented by the following formula, 0.15 parts by weight of a fluorine-based surfactant ("S420" manufactured by AGC Seimi Chemical Co., Ltd.), a photopolymerization initiator A liquid crystal composition was prepared by mixing 4.3 parts by weight of “Irgacure OXE 04”), and 162.3 parts by weight of cyclopentanone and 243.5 parts by weight of 1,3-dioxolane as solvents.
  • PET film (Production of Intermediate Film Including Liquid Crystal Cured Layer)
  • a polyethylene terephthalate film (“A4100” manufactured by Toyobo Co., Ltd., thickness 100 ⁇ m; hereinafter, sometimes referred to as "PET film” as appropriate) was prepared as a supporting substrate.
  • This PET film is a film that has been subjected to an easy-slip treatment on one side.
  • the non-slip surface of the PET film was rubbed. Thereafter, the liquid crystal composition was coated on the rubbing-treated surface of the PET film using a wire bar to form a liquid crystal composition layer.
  • the liquid crystal composition layer was heated at 135 ° C. for 4 minutes to align the liquid crystal compounds in the layer. Thereafter, the liquid crystal composition layer was irradiated with ultraviolet light of 500 mJ / cm 2 in a nitrogen atmosphere to cure the liquid crystal composition layer, thereby forming a 0.4 ⁇ m thick first unit cured layer.
  • the surface of the first unit cured layer was subjected to rubbing treatment. Then, using the wire bar, the remaining liquid crystal composition used for forming the first unit cured layer is coated on the rubbing-treated surface of the first unit cured layer to form a liquid crystal composition layer. did.
  • the liquid crystal composition layer was heated at 135 ° C. for 4 minutes to align the liquid crystal compounds in the layer. Thereafter, the liquid crystal composition layer was irradiated with ultraviolet light of 500 mJ / cm 2 in a nitrogen atmosphere to cure the liquid crystal composition layer, thereby forming a second unit cured layer.
  • an intermediate film provided with a PET film and a liquid crystal cured layer including the first unit cured layer and the second unit cured layer was obtained.
  • the molecules of the liquid crystal compound contained in the liquid crystal cured layer are inclined with respect to the in-plane direction of the liquid crystal cured layer (that is, with respect to the layer plane), but the tilt angle is not uniform. Specifically, the tilt angle of the molecules of the liquid crystal compound is relatively small in the surface on the PET film side of the liquid crystal cured layer, and the tilt angle of the molecules of the liquid crystal compound is relatively in the surface on the air side of the liquid crystal cured layer. large.
  • the liquid crystal cured layer was evaluated by the method described above using the obtained intermediate film.
  • first cured liquid crystal layer the cured liquid crystal layer of the first film piece
  • second cured liquid crystal layer the cured liquid crystal layer of the second film piece
  • the first liquid crystal cured layer of the first film piece and an optically isotropic resin film are bonded with an adhesive ("CS9621 T” manufactured by Nitto Denko Corporation)
  • an adhesive (“CS9621 T” manufactured by Nitto Denko Corporation)
  • the PET film was peeled off to obtain a multilayer film having a layer structure of resin film / pressure-sensitive adhesive layer / first liquid crystal cured layer.
  • the PET film of the second film piece was peeled off to obtain an optically anisotropic body having a layer configuration of “resin film / pressure-sensitive adhesive layer / first liquid crystal cured layer / pressure-sensitive adhesive layer / second liquid crystal cured layer”.
  • a portion of “first liquid crystal cured layer / adhesive layer / second liquid crystal cured layer” corresponds to an optical anisotropic layer
  • a first liquid crystal cured layer corresponds to a first region
  • the second liquid crystal cured layer corresponds to the second region. Therefore, in the liquid crystal cured layer obtained in Example 1, the surface on the side where the tilt angle of the first region is small and the surface on the side where the tilt angle of the second region is large are opposed (see FIG. 7). ).
  • a section including a specific cross section of the obtained optically anisotropic layer of the optically anisotropic body was observed for polarization by the method described above.
  • a first area colored in a certain color, an adhesive layer colored in a color different from the first area, and a second area colored in the same color as the first area were observed.
  • the first region and the second region were distinguished and observed due to the presence of the adhesive layer between them.
  • the viewing angle characteristics of the above optical anisotropic material were evaluated by the above-described method.
  • Example 2 From the intermediate film produced in Example 1, two pieces of film, a first film piece and a second film piece, were cut out. The first liquid crystal cured layer of the first film piece and the second liquid crystal cured layer of the second film piece were bonded by the above-mentioned adhesive. This bonding was performed so as to satisfy the conditions (X3) and (X4) described in Example 1.
  • the PET film of the first film piece was peeled off.
  • the surface of the first liquid crystal cured layer which appeared by peeling off the PET film and the optically isotropic resin film were pasted together by the above-mentioned adhesive.
  • the PET film of a 2nd film piece was peeled off, and the optical anisotropic body which has a layer structure of "resin film / adhesive layer / 1st liquid-crystal cured layer / adhesive layer / 2nd liquid-crystal cured layer" was obtained.
  • first liquid crystal cured layer / adhesive layer / second liquid crystal cured layer corresponds to an optical anisotropic layer
  • a first liquid crystal cured layer corresponds to a first region
  • the second liquid crystal cured layer corresponds to the second region. Therefore, in the optically anisotropic layer obtained in Example 1, the surface on the side where the tilt angle of the first region is large is opposed to the surface on the side where the tilt angle of the second region is large (see FIG. 6).
  • a section including a specific cross section of the obtained optically anisotropic layer of the optically anisotropic body was observed for polarization by the method described above.
  • a first area colored in a certain color, an adhesive layer colored in a color different from the first area, and a second area colored in the same color as the first area were observed.
  • the first area and the second area were observed separately because of the presence of the adhesive layer between them.
  • the viewing angle characteristics of the above optical anisotropic material were evaluated by the above-described method.
  • Example 3 From the intermediate film produced in Example 1, two pieces of film, a first film piece and a second film piece, were cut out.
  • the first liquid crystal cured layer of the first film piece was bonded to the optically isotropic resin film by the above-mentioned adhesive. Thereafter, the PET film was peeled off to obtain a multilayer film having a layer structure of "resin film / pressure-sensitive adhesive layer / first liquid crystal cured layer".
  • the second liquid crystal cured layer of the second film piece was bonded to the optically isotropic resin film by the above-mentioned pressure-sensitive adhesive. Thereafter, the PET film was peeled off to obtain a multilayer film having a layer structure of "resin film / pressure-sensitive adhesive layer / second liquid crystal cured layer”.
  • a section including a specific cross section of the obtained optically anisotropic layer of the optically anisotropic body was observed for polarization by the method described above.
  • a first area colored in a certain color, an adhesive layer colored in a color different from the first area, and a second area colored in the same color as the first area were observed.
  • the first area and the second area were observed separately because of the presence of the adhesive layer between them.
  • the viewing angle characteristics of the above optical anisotropic material were evaluated by the above-described method.
  • Comparative Example 1 0.30 parts by weight of a fluorine-based surfactant (“F562” manufactured by DIC Corporation) was used instead of 0.15 parts by weight of a fluorine-based surfactant (“S420” manufactured by AGC Seimi Chemical Co., Ltd.).
  • a liquid crystal composition was obtained by performing the same operation as the step of Example 1 (production of liquid crystal composition) except for the above matters.
  • the rubbing process was performed to the non-slippery process surface of PET film as a support base material like Example 1. Thereafter, using a wire bar, the liquid crystal composition prepared in this comparative example was coated on the rubbing-treated surface of the PET film to form a liquid crystal composition layer.
  • the liquid crystal composition layer was heated at 110 ° C. for 4 minutes to align the liquid crystal compounds in the layer. The above heating conditions were such temperature conditions that the residual viscosity of the test composition corresponding to the liquid crystal composition used was greater than 800 cP.
  • the liquid crystal composition layer was irradiated with ultraviolet light of 500 mJ / cm 2 in a nitrogen atmosphere to cure the liquid crystal composition layer, thereby forming a liquid crystal cured layer having a thickness of 1.0 ⁇ m. Thereby, an intermediate film provided with a PET film and a liquid crystal cured layer was obtained.
  • the liquid crystal cured layer was evaluated by the method described above using the obtained intermediate film.
  • the PET film of the first film piece was peeled off.
  • the surface of the first liquid crystal cured layer which appeared by peeling off the PET film and the optically isotropic resin film were pasted together by the above-mentioned adhesive.
  • the PET film of a 2nd film piece was peeled off, and the optical anisotropic body which has a layer structure of "resin film / adhesive layer / 1st liquid-crystal cured layer / adhesive layer / 2nd liquid-crystal cured layer" was obtained.
  • first liquid crystal cured layer / adhesive layer / second liquid crystal cured layer corresponds to an optical anisotropic layer
  • a first liquid crystal cured layer corresponds to a first region
  • the second liquid crystal cured layer corresponds to the second region.
  • a section including a specific cross section of the obtained optically anisotropic layer of the optically anisotropic body was observed for polarization by the method described above.
  • a first area colored in a certain color, an adhesive layer colored in a color different from the first area, and a second area colored in the same color as the first area were observed.
  • the first area and the second area were observed separately because of the presence of the adhesive layer between them.
  • the viewing angle characteristics of the above optical anisotropic material were evaluated by the above-described method.
  • Group / group A surface obtained by laminating the surface on the PET film side of the liquid crystal cured layer corresponding to the first region and the surface on the PET film side of the liquid crystal cured layer corresponding to the second region.
  • ⁇ 1 In a specific cross section of the optically anisotropic layer, the angle that the slow axis of the first region of the optically anisotropic layer makes with the in-plane direction of the optically anisotropic layer (that is, with respect to the layer plane) .
  • T1 Thickness of the first region of the optically anisotropic layer.
  • Re1 In-plane retardation of the first region of the optically anisotropic layer.
  • Wavelength dispersion "reverse” reverse wavelength dispersion.
  • ⁇ 2 In a specific cross section of the optically anisotropic layer, an angle formed by the slow axis of the second region of the optically anisotropic layer with respect to the in-plane direction of the optically anisotropic layer (that is, with respect to the layer plane) .
  • T2 Thickness of second region of optically anisotropic layer.
  • Re2 In-plane retardation of second region of optically anisotropic layer.
  • ⁇ An angle formed by the slow axis of the first region and the slow axis of the second region in the specific cross section of the optically anisotropic layer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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  • Liquid Crystal (AREA)
PCT/JP2019/001137 2018-01-19 2019-01-16 光学異方体及びその製造方法 WO2019142831A1 (ja)

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JP2006293098A (ja) * 2005-04-12 2006-10-26 Fuji Photo Film Co Ltd 光学補償フィルム及び液晶表示装置
JP2007041583A (ja) * 2005-07-30 2007-02-15 Samsung Electronics Co Ltd 偏光補償フィルム、偏光プリズムフィルムの製造方法、表示パネルアセンブリ、及び表示装置
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JP2001500984A (ja) * 1996-09-17 2001-01-23 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 光学リターデーション膜
JP2005062668A (ja) * 2003-08-19 2005-03-10 Fuji Photo Film Co Ltd 液晶表示装置
JP2006293098A (ja) * 2005-04-12 2006-10-26 Fuji Photo Film Co Ltd 光学補償フィルム及び液晶表示装置
JP2007041583A (ja) * 2005-07-30 2007-02-15 Samsung Electronics Co Ltd 偏光補償フィルム、偏光プリズムフィルムの製造方法、表示パネルアセンブリ、及び表示装置
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