KR20200076709A - Retardation film and optical laminate - Google Patents

Abstract

The retardation film 1 includes a base layer 11, an alignment layer 12, and a retardation layer-containing layer comprising at least one retardation layer 13 in this order. The retardation layer 13 has a first end region 13a including one end in the width direction and a first adjacent region 13c _a adjacent to the first end region 13a in the width direction. The first adjacent region 13c _a has a first slow axis, and the first end region 13a has a second slow axis that is a slow axis in a direction different from the first slow axis.

Description

Retardation film and optical laminate

The present invention relates to a retardation film and an optical laminate.

In a display device such as an organic EL display device or a liquid crystal display device, a member containing an optically anisotropic film such as a polarizing film or a retardation film is used. As such an optically anisotropic film, it is known to form a layer of a liquid crystal compound on a base film subjected to alignment treatment.

For example, Patent Document 1 discloses an elliptical polarizing plate comprising a patterning polarizing layer containing a liquid crystal compound and a patterning retardation layer containing a liquid crystal compound. In addition, Patent Document 2 describes that a liquid crystal material is used as a retardation layer of an optical film used for a circular polarizing plate or the like.

Patent Document 1: Japanese Patent Publication No. 2009-193014 Patent Document 2: Japanese Patent Publication No. 2015-21976

An object of the present invention is to provide a retardation film suitable for producing an optical laminate having a retardation layer containing a liquid crystal compound, an optical laminate with a base layer, an optical laminate and a method for producing the same.

This invention provides the retardation film shown below, the optical laminated body with a base layer, an optical laminated body, and its manufacturing method.

[1] As a retardation film comprising a base layer, an alignment layer, and a retardation layer-containing layer comprising at least one retardation layer in this order,

The retardation layer has a first end region including one end in the width direction, and a first adjacent region adjacent to the first end region in the width direction,

The first adjacent region has a first slow axis,

The first end region has a second slow axis, which is a slow axis in a direction different from the first slow axis.

[2] The retardation film according to [1], wherein the first slow axis or the second slow axis is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction that is a direction orthogonal to the width direction in the plane of the retardation layer. .

[3] The phase difference film according to [1] or [2], in which the alignment layer contains a photo-alignment polymer.

[4] The retardation layer further has a second end region including the other end in the width direction, and a second adjacent region adjacent to the second end region in the width direction,

The second adjacent region has a third slow axis,

The retardation film according to any one of [1] to [3], wherein the second end region has a fourth slow axis that is a slow axis in a direction different from the third slow axis.

[5] The phase difference described in [4], wherein the third slow axis or the fourth slow axis is a slow axis in the direction perpendicular to the orthogonal direction, which is a direction orthogonal to the width direction, in the plane of the phase difference layer. film.

[6] A retardation film comprising a base layer, an alignment layer, and a retardation layer-containing layer comprising at least one retardation layer in this order,

The retardation layer is on the alignment layer,

The alignment layer has a third end region including one end in the width direction, and a third adjacent region adjacent to the third end region in the width direction,

The third adjacent region has a first alignment axis,

The third end region has a second alignment axis which is an alignment axis in a direction different from the first alignment axis.

[7] The alignment layer has a fourth end region including the other end in the width direction, and a fourth adjacent region adjacent to the fourth end region in the width direction,

The fourth adjacent region has a third alignment axis,

The retardation film according to [6], wherein the fourth end region has a fourth alignment axis which is an alignment axis in a direction different from the first alignment axis.

[8] An optical laminate comprising a retardation film according to any one of [1] to [7] and a base layer comprising an optical film,

The optical film is an optical laminate with a base layer, which is laminated on the retardation layer-containing layer of the retardation film through an adhesive layer.

[9] An optical laminate comprising a retardation film according to any one of [1] to [5] and a base layer comprising an optical film,

The optical film is laminated on the retardation layer-containing layer of the retardation film through an adhesive layer,

The second slow axis of the first end region is a slow axis in a direction forming an angle of 20° or less with the orthogonal direction,

One end of the adhesive layer in the width direction is on the first end region of the retardation layer, or on a first boundary line that is a boundary between the first end region and the first adjacent region, the optical with base layer Laminate.

[10] An optical laminate comprising a retardation film according to any one of [1] to [5] and a base layer comprising an optical film,

The optical film is laminated on the retardation layer-containing layer of the retardation film through an adhesive layer,

The first slow axis of the first adjacent region is a slow axis in a direction forming an angle of 20° or less with the orthogonal direction,

One end of the adhesive layer in the width direction is on the first adjacent area of the retardation layer, or on a first boundary line that is a boundary between the first end area and the first adjacent area. Laminate.

[11] The retardation film is the retardation film according to [4] or [5], and the fourth slow axis in the second end region is a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction,

[9] The other end of the adhesive layer in the width direction is above the second end region of the retardation layer, or on a second boundary line that is a boundary between the second end region and the second adjacent region, or The optical laminated body with a base material layer as described in [10].

[12] The retardation film is the retardation film according to [4] or [5], and the third slow axis of the second adjacent region is a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction,

The other end of the adhesive layer in the width direction is above the second adjacent region of the retardation layer, or on a second boundary line that is a boundary between the second end region and the second adjacent region [9] or The optical laminated body with a base material layer as described in [10].

[13] An optical laminate comprising an optical film and a retardation layer-containing layer comprising at least one retardation layer laminated through an adhesive layer,

The phase difference layer includes a liquid crystal compound,

The retardation layer has an optical laminate in which the position of one end in the width direction is the same as the position of one end in the width direction of the adhesive layer.

[14] The optical laminate according to [13], wherein the retardation layer has the same position at the other end in the width direction as the position at the other end in the width direction of the adhesive layer.

[15] In addition, the retardation layer-containing layer has an alignment layer on the retardation layer,

The optical laminate according to [13] or [14], wherein the position of one end of the alignment layer in the width direction is the same as the position of one end of the adhesive layer.

[16] The optical laminate according to [15], wherein in the width direction, the position of the other end of the alignment layer is the same as the position of the other end of the adhesive layer.

[17] The optical laminate according to [15] or [16], wherein the alignment layer contains a photo-alignment polymer.

[18] The retardation layer has a first' end region including one end in the width direction and a first adjacent region adjacent to the first' end region in the width direction,

The first adjacent region has a first slow axis,

The optical laminate according to any one of [13] to [17], wherein the first end region has a second slow axis that is a slow axis in a direction different from the first slow axis.

[19] The optical laminate according to [18], wherein the second slow axis is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction that is a direction orthogonal to the width direction in the plane of the retardation layer.

[20] The retardation layer further has a second' end region including the other end in the width direction, and a second adjacent region adjacent to the second' end region in the width direction,

The second adjacent region has a third slow axis,

The optical laminate according to [18] or [19], wherein the second' end region has a fourth slow axis that is a slow axis in a direction different from the third slow axis.

[21] The optical laminate according to [20], wherein the fourth slow axis is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer.

[22] The retardation layer is on the alignment layer,

The alignment layer has a third' end region including one end in the width direction, and a third adjacent region adjacent to the third' end region in the width direction,

The third adjacent region has a first alignment axis,

The optical laminate according to any one of [15] to [17], wherein the 3'end region has a second alignment axis which is an alignment axis in a direction different from the first alignment axis.

[23] The alignment layer has a fourth' end region including the other end in the width direction, and a fourth adjacent region adjacent to the fourth' end region in the width direction,

The fourth adjacent region has a third alignment axis,

The optical laminate according to [22], wherein the fourth' end region has a fourth alignment axis which is an alignment axis in a direction different from the third alignment axis.

[24] As a method for producing the retardation film according to any one of [1] to [7],

An alignment layer forming process of forming the alignment layer on the base layer,

A method for producing a retardation film having a retardation layer forming step of forming the retardation layer-containing layer on the alignment layer.

[25] The alignment layer includes a photo-alignment polymer,

The said alignment layer formation process is a manufacturing method of the retardation film as described in [24] which has the process of irradiating a polarization ultraviolet-ray to the said photo-alignment polymer.

[26] The step of preparing the retardation film according to any one of [1] to [7],

The process of preparing the optical film,

A method of manufacturing an optical laminate with a substrate layer, having a lamination step of laminating the optical film on the retardation layer-containing layer of the retardation film through an adhesive layer.

[27] The step of preparing the retardation film according to any one of [1] to [5],

The process of preparing the optical film,

It has a lamination process of laminating the optical film on the retardation layer-containing layer of the retardation film through an adhesive layer,

The second slow axis of the first end region is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer,

The adhesive layer formed in the lamination process has one end in the width direction over the first end region of the retardation layer, or on a first boundary line that is a boundary between the first end region and the first adjacent region. The manufacturing method of the optical laminated body with a base material layer.

[28] The step of preparing the retardation film according to any one of [1] to [5],

The process of preparing the optical film,

It has a lamination process of laminating the optical film on the retardation layer-containing layer of the retardation film through an adhesive layer,

The first slow axis in the first adjacent region is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction, which is a direction orthogonal to the width direction in the plane of the retardation layer,

The adhesive layer formed in the lamination process has one end in the width direction over the first adjacent region of the retardation layer, or on a first boundary line that is a boundary between the first end region and the first adjacent region. The manufacturing method of the optical laminated body with a base material layer.

[29] The retardation film is the retardation film according to [4] or [5], and the fourth slow axis of the second end region is an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer. It is the slow axis in the direction forming an angle of 20° or less,

The other end of the adhesive layer in the width direction is above the second end region of the retardation layer, or on a second boundary line that is a boundary between the second end region and the second adjacent region [27] or The manufacturing method of the optical laminated body with a base material layer as described in [28].

[30] The retardation film is the retardation film according to [4] or [5], and the third slow axis of the second adjacent region is an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer. It is the slow axis in the direction forming an angle of 20° or less,

The other end of the adhesive layer in the width direction is above the second adjacent region of the retardation layer, or on the second boundary line that is a boundary between the second end region and the second adjacent region [27] or The manufacturing method of the optical laminated body with a base material layer as described in [28].

[31] The step of preparing the optical laminate with the base layer according to any one of [9] to [12],

An optical layer having a peeling step of peeling a peeling layer comprising the base layer included in the optical layered body with the base layer in a direction parallel to an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer Method of manufacturing a laminate.

ADVANTAGE OF THE INVENTION According to this invention, the retardation film suitable for manufacturing the optical laminated body which has a retardation layer containing a liquid crystal compound, the optical laminated body with a base material layer, an optical laminated body, and its manufacturing method can be provided.

1(A) is a plan view schematically showing an example of the retardation film of the present invention, and (B) is an XX sectional view of FIG. 1(A).
2 is a schematic cross-sectional view schematically showing an example of an optical laminate with a base material layer of the present invention.
3 is a schematic cross-sectional view schematically showing a state in which the release layer is peeled from the optical layered body with a base layer of the present invention.
4 is a schematic cross-sectional view schematically showing an example of the optical laminate of the present invention.
It is a schematic sectional drawing which shows typically the state which peeled the peeling layer from the optical laminated body with a base material layer of this invention.
6 is a schematic cross-sectional view schematically showing an example of the optical laminate of the present invention.
7(A) is a schematic cross-sectional view schematically showing an example of the optical layered body with a base material layer of the present invention, and (B) and (C) are steps of the manufacturing process of the optical layered body with a base material layer of the present invention. It is a schematic sectional drawing which shows an example typically.
8(A) is a schematic cross-sectional view schematically showing an example of the retardation film of the present invention, and (B) is a schematic cross-sectional view schematically showing an example of the optical layered body with a base material layer of the present invention, ( C) is a schematic cross-sectional view schematically showing a state in which the release layer is peeled from the optical layered body with a base layer shown in (B).
9A and 9B are schematic cross-sectional views schematically showing an example of a manufacturing process of the retardation film of the present invention.
10 is a schematic cross-sectional view schematically showing an example of the retardation film of the present invention.
11A to 11C are schematic views schematically showing an example of the optical laminate of the present invention.
12 is a schematic view schematically showing an example of the optical laminate of the present invention.
13A to 13C are schematic views schematically showing an example of the optical laminate of the present invention.

<Overview of the present invention>

The retardation film of the present invention is a retardation film comprising a base layer, an alignment layer, and a retardation layer-containing layer comprising at least one retardation layer in this order,

The retardation layer has a first end region including one end in the width direction and a first adjacent region adjacent to the first end region in the width direction,

The first adjacent region has a first slow axis,

The first end region has a second slow axis that is a slow axis in a direction different from the first slow axis.

The retardation film of the present invention is a retardation film comprising a base layer, an alignment layer, and a retardation layer-containing layer comprising at least one retardation layer in this order,

The retardation layer is above the alignment layer,

The alignment layer has a third end region including one end in the width direction, and a third adjacent region adjacent to the third end region in the width direction,

The third adjacent region has a first alignment axis,

The third end region may have a second alignment axis which is an alignment axis in a direction different from the first alignment axis.

Moreover, the optical layered body with a base material layer of this invention is the optical layered body with a base layer containing the said retardation film and an optical film, The optical film is laminated|stacked on the retardation layer containing layer of a retardation film through an adhesive layer.

Further, the optical laminate of the present invention is an optical laminate comprising an optical film and a retardation layer-containing layer comprising at least one retardation layer laminated through an adhesive layer, the retardation layer comprising a liquid crystal compound, and the retardation layer The position of one end in the width direction is the same as the position of one end in the width direction of the adhesive layer.

The retardation layer-containing layer only needs to include at least one retardation layer, and may include two or more retardation layers. In the case where two or more retardation layers are included, at least one retardation layer may have the above retardation characteristics, and other retardation layers may not have the retardation characteristics. When two or more retardation layers are included, it is preferable that all retardation layers have the above retardation characteristics. Further, when the retardation layer-containing layer includes two or more retardation layers, for example, two or more retardation layers may be stacked through each other through an adhesive layer for a retardation layer, in which case the retardation layer-containing layer contains an adhesive layer for a retardation layer in addition to the retardation layer. can do. The retardation layer-containing layer including two or more retardation layers may be one in which two or more retardation layers are laminated without passing through the adhesive layer for the retardation layer. Moreover, the retardation layer-containing layer may contain another alignment layer distinct from the alignment layer contained in the retardation film.

The retardation film can be used as an optical laminated body with a base layer by laminating an optical film as described above, and the optical layered body with a base layer is a release layer (base layer, comprising a base layer) as described later. Alternatively, the base layer and the alignment layer) may be peeled off and used.

In this case, the adhesive layer for laminating the retardation layer-containing layer and the optical film so that the peeling layer can be peeled from the optical layered body with the base layer has an end portion of the retardation layer-containing layer (of the layer forming the phase difference layer-containing layer, the width thereof) It is preferable to form such that it does not protrude from the end) of the layer located at the outermost side of the direction. In addition, since the end of the retardation layer without an adhesive layer is a part to be removed in the final product, it is preferable that the end of the adhesive layer is located near the end of the retardation-containing layer as much as possible.

According to the retardation film, the retardation characteristics of the first end region and the first adjacent region of the retardation layer are different from each other. Further, according to the retardation film, the third end region and the third adjacent region of the alignment layer have different alignment axes, so that the phase difference characteristics of the retardation layer formed on the alignment layer can be different. Therefore, when the light transmittance of the retardation layer is observed using a mirror, a polarizing plate, or the like, the range of the first end region or the third end region can be easily recognized. Thereby, since it becomes easy to grasp the position where an adhesive layer is formed, it becomes easy to manufacture the optical laminated body with a base material layer which can peel a peeling layer. Further, since the range of the first end region or the third end region can be easily recognized, the position of the end of the adhesive layer can be formed near the end of the retardation layer included in the retardation layer-containing layer. This makes it easy to reduce the range of the end portion of the retardation layer removed from the final product.

In addition, in the retardation film of the present invention, the first slow axis or the second slow axis is preferably a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction that is a direction orthogonal to the width direction in the plane of the retardation layer. . More specifically, in the retardation film, [i] the second slow axis of the first end region is a slow axis in the direction forming an angle of 20° or less with the orthogonal direction, or [ii] the first slow ground of the first adjacent region The axis is preferably a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction.

This will be described later in detail, but by peeling the release layer containing the base layer from the optical film provided with the base layer, the position of one end in the width direction of the retardation layer is one end in the width direction of the adhesive layer. The same optical laminate as the position of can be easily obtained.

<Embodiment of the present invention>

[First Embodiment]

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

〔Phase difference film〕

1(A) is a plan view schematically showing an example of the retardation film of the present embodiment, and FIG. 1(B) is an X-X sectional view of FIG. 1(A). In the figure, W represents the width direction, and L represents the orthogonal direction orthogonal to the width direction W in plan view. The retardation film 1 includes a base layer 11, an alignment layer 12, and a retardation layer 13 (a phase difference layer-containing layer) in this order. The retardation film 1 is, for example, as shown in (A) and (B) of FIG. 1, in the width direction cross section, in the order of the base layer 11, the alignment layer 12, and the retardation layer 13 The length of the direction is short, and the position in the width direction at both ends of the alignment layer 12 is inside the width direction at both ends of the base layer, and the position in the width direction at both ends of the retardation layer 13 is It is inside the width direction of both ends of the alignment layer 12.

Moreover, the retardation film 1 is not limited to that the length in the width direction of each layer and the position in the width direction of both ends of each layer are the above relationship. For example, the base layer 11 and the alignment layer 12 have the same length in the width direction, and in the width direction cross section of the retardation film 1, the positions in the width direction at both ends may be the same. Moreover, the length of the orientation layer 12 and the retardation layer 13 are the same in the width direction, and in the width direction cross section of the retardation film 1, the position of the width direction of both ends may be the same. Alternatively, the length in the width direction of the alignment layer 12 is shorter than the length in the width direction of the retardation layer 13, and the position of the width direction at both ends of the alignment layer 12 is the width direction at both ends of the retardation layer 13 It may be inside the position of. In addition, the length of the base layer 11 and the retardation layer 13 are the same in the width direction, and in the width direction cross section of the retardation film 1, the position of the width direction of both ends may be the same.

The base layer 11 has a function as a support layer for supporting the alignment layer 12 and the retardation layer 13 formed thereon.

The alignment layer 12 has an alignment regulating force to align the liquid crystal compound contained in the retardation layer 13 formed thereon in a desired direction, and can be formed using, for example, a photo-alignment polymer. The retardation layer 13 is not particularly limited as long as it gives a predetermined retardation to light, and can be formed using a known liquid crystal compound. As will be described later, the retardation layer 13 has first end regions 13a and second end regions 13b having both ends of the width direction W having a slow axis in a direction different from that of the adjacent region. Have Therefore, each region of the alignment layer 12 can also have an alignment axis capable of exerting a different orientation regulating force by corresponding to each region of the retardation layer 13 formed on the alignment layer 12. In the alignment layer 12, the third end regions 12a at both ends in the width direction W of the alignment layer 12, as shown by the downward downward diagonal line in FIGS. 1A and 1B. And the fourth end region 12b has an alignment axis capable of exerting an orientation regulating force capable of imparting the phase difference characteristics of the first end region 13a and the second end region 13b of the retardation layer 13, respectively. . In addition, the third adjacent region 12c _a and the fourth adjacent region 12c _b adjacent to the third end region 12a and the fourth end region 12b of the alignment layer 12 are respectively retardation layers 13. ) Has an orientation axis capable of exerting an orientation regulating force capable of imparting the phase difference characteristics of the first adjacent region 13c _a and the second adjacent region 13c _b .

The retardation layer 13 has a first end region 13a including one end in the width direction W and a first in the width direction W, as shown in Figs. 1A and 1B. The first adjacent region 13c _a adjacent to the end region 13a, the second end region 13b including the other end in the width direction W, and the second end region in the width direction W ( 13b), and a second adjacent region 13c _b . In FIGS. 1A and 1B, the first end regions 13a and the second end regions 13b are indicated by diagonal upward upwards. In the retardation film 1, the first boundary line 13p forming the boundary between the first end region 13a and the first adjacent region 13c _a is straight, and the second end region 13b and the second adjacent region ( The second boundary line 13q forming the boundary of 13c _b ) is also straight. Further, the first boundary line 13p and the second boundary line 13q are parallel to the orthogonal direction L.

The first adjacent area 13c _a is not particularly limited as long as it is an area adjacent to the first end area 13a, and the second adjacent area 13c _b is also an area adjacent to the second end area 13b. Is not particularly limited. For example, as shown in Figs. _1A and 1B, the first adjoining region 13c _a and the second adjoining region 13c _b may be regions having the same slow axis direction. In this case, the first adjacent region 13c _a is adjacent to the second end region 13b on the opposite side of the width direction W from the side adjacent to the first end region 13a in the width direction W. , The second adjoining region 13c _b adjoins the first end region 13a on the opposite side of the width direction W from the side adjoining the second end region 13b. In addition, the 1st adjoining area 13c _a and the 2nd adjoining area 13c _b are mutually different regions of a slow axis direction, and may be in contact with each other, and the 1st adjoining area 13c _a and the 2nd adjoining area 13c _b ), an area in the direction of the slow axis may be present.

The first adjacent region 13c _a has a first slow axis. The first end region 13a has a second slow axis that is a slow axis in a direction different from the first slow axis. Further, the second adjacent region 13c _b has a third slow axis. The second end region 13b has a fourth slow axis that is a slow axis in a direction different from the third slow axis. Here, the 2nd slow axis and the 4th slow axis are the slow axes in the direction which makes an angle of 20 degrees or less with the orthogonal direction L which is a direction orthogonal to the width direction W in the plane of the phase difference layer 13. The angle formed by the second slow axis or the fourth slow axis and the orthogonal direction (L) is the angle formed by the second slow axis and the orthogonal direction (L), or the angle formed by the fourth slow axis and the orthogonal direction (L) Let's say the acute angle. In addition, the angle between the second slow axis or the fourth slow axis and the orthogonal direction is 0°, which means that the second slow axis or the fourth slow axis and the perpendicular direction L are parallel.

In the retardation film 1 shown in FIGS. 1A and 1B, the first boundary line 13p and the second boundary line 13q are linear, and these boundary lines and the orthogonal direction L are parallel. Therefore, in the retardation layer 13 of the retardation film 1, the second slow axis is a slow axis in a direction forming an angle of 20° or less with the first boundary line 13p, and the fourth slow axis is the second boundary line 13q ) And a slow axis in a direction that forms an angle of 20° or less. The angle formed by the second slow axis and the first boundary line 13p may be regarded as an angle formed when both of the second slow axis and the first boundary line 13p extend, and they are not touched even if both are extended. The angle at the time (when the second slow axis and the first boundary line 13p are parallel) is 0°. In addition, the angle formed by the fourth slow axis and the second boundary line 13q may be regarded as an angle formed when the fourth slow axis and the second boundary line 13q extend so that they are in contact. The angle when not (when the fourth slow axis and the second boundary line 13q are parallel) is 0°.

The first end region 13a has a second slow axis, and the second slow axis is preferably a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L (or the first boundary line 13p). It is more preferable that this angle is 10° or less, more preferably 5° or less, and most preferably 0° (the second slow axis and the orthogonal direction L or the first boundary line 13p are parallel). Do. The second end region 13b also has a fourth slow axis, and the fourth slow axis is a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L (or the second boundary line 13q). It is preferable that this angle is more preferably 10° or less, more preferably 5° or less, and is 0° (the fourth slow axis is orthogonal (L) or the second boundary line 13q is parallel). It is most preferred. As a result, although the details will be described later, an optical layered body in which the positions of both ends in the width direction of the retardation layer are the same as the positions of both ends in the width direction of the adhesive layer can be easily obtained from the optical layered body provided with the base layer described later. .

The orientation state of the first end region 13a and the orientation state of the second end region 13b may be the same or different from each other. Moreover, the orientation state of the 1st adjoining area|region 13c _a and the orientation state of 2nd adjoining area|region 13c _b may be mutually same or different. The state of the orientation of each region of the retardation layer 13 can be realized by adjusting the liquid crystal orientation of the liquid crystal compound constituting the retardation layer, and the liquid crystal alignment of the liquid crystal compound can be adjusted by, for example, the alignment control force of the alignment layer , It can be adjusted by the alignment axis of the alignment layer. For example, the third adjacent region 12c _a has a first alignment axis, and the third end region 12a has a second alignment axis, which is an alignment axis in a direction different from the first alignment axis, so that the first adjacent area ( 13c _a ) and the liquid crystal orientation of the liquid crystal compound included in the first end region 13a can be adjusted. In addition, the second adjacent region ( _c ) has a third alignment axis, and the fourth end region 12b has a fourth alignment axis, which is an alignment axis in a direction different from the third alignment axis, so that the second adjacent area ( 13c _b ) and the liquid crystal orientation of the liquid crystal compound included in the second end region 13b can be adjusted.

As described above, in the retardation film 1 shown in FIGS. 1A and 1B, the first end region 13a and the first adjacent region 13c _a of the retardation layer 13 have retardation characteristics with each other. In addition, the phase difference characteristics of the second end region 13b and the second adjacent region 13c _b are different from each other. Therefore, when the light transmittance of the retardation film 1 is observed using a mirror, a polarizing plate, or the like, the ranges of the first end region 13a and the second end region 13b can be easily recognized.

The length of the first end region 13a in the width direction W is usually 50 mm or less, preferably 35 mm or less, more preferably 20 mm or less, and even more preferably 10 mm or less. The length of the width direction W of the second end region 13b is usually 50 mm or less, preferably 35 mm or less, more preferably 20 mm or less, and even more preferably 10 mm or less. The lengths of the width direction W of the first end region 13a and the second end region 13b may be the same or different from each other. Further, the length of the third end region 12a in the width direction W is usually 60 mm or less, preferably 45 mm or less, more preferably 30 mm or less, and even more preferably 20 mm or less. The length of the fourth end region 12b in the width direction W is usually 60 mm or less, preferably 45 mm or less, more preferably 30 mm or less, and even more preferably 20 mm or less. The lengths of the width direction W of the third end region 12a and the fourth end region 12b may be the same or different from each other. The lengths of the width direction W of the first end region 13a and the second end region 13b and the lengths of the width direction W of the third end region 12a and the fourth end region 12b are If it is the said range, it is easy to recognize the 1st end area 13a or the 2nd end area 13b, and it is easy to arrange the adhesive layer mentioned later on these areas. Therefore, when obtaining the optical layered body with the base layer described below, both ends of the adhesive layer to be laminated are placed on the first end region 13a or on the first boundary line 13p, and on the second end region 13b. 2 It can be easily formed on the boundary line 13q, and the range of the end portion of the phase difference layer removed from the final product can be made small.

The direction of the first slow axis of the first adjacent region 13c _a is not particularly limited as long as it is different from the orientation state of the first end region 13a, and the orthogonal direction L (or the first boundary line 13p) ) And 0 to 90°. For example, the first slow axis may be a slow axis in a direction that forms an angle of 45° or 90° with the orthogonal direction L. The direction of the third slow axis of the second adjacent region 13c _b is not particularly limited as long as it is different from the orientation state of the second end region 13b, and the orthogonal direction L (or the second boundary line 13q) It can be made in a direction that forms an angle in the range of 0 to 90°. For example, the third slow axis may be a slow axis in a direction forming an angle of 45° or 90° with the second boundary line 13q.

In addition, the angle formed by the first slow axis or the third slow axis in the orthogonal direction (L) is the angle formed by the first slow axis and the orthogonal direction (L), or the third slow axis and the orthogonal direction (L) Let's say the angle of the acute angle among the angles. An angle formed by the first slow axis or the third slow axis in an orthogonal direction is 0°, which means that the first slow axis or the third slow axis is orthogonal to the third slow axis. In addition, the angle formed by the first slow axis and the first boundary line 13p may be regarded as an angle formed when both of the first slow axis and the first boundary line 13p are in contact with each other. When not (the first slow axis and the first boundary line 13p are parallel), the angle is 0°. The angle formed by the third slow axis and the second boundary line 13q may be regarded as an angle formed when both of the third slow axis and the second boundary line 13q extend, and they are not touched even if both are extended. The angle at the time (when the third slow axis and the second boundary line 13q are parallel) is 0°.

As described above, in the retardation film 1, the first end region and the first adjacent region of the retardation layer 13 have a slow axis in different directions, and the second end region and the second adjacent region are in different directions. It has an axis. In the retardation film 1, the third end region and the third adjacent region of the alignment layer 12 have alignment axes in different directions, and the fourth end region and the fourth adjacent region have alignment axes in different directions. May be By adjusting the direction of the alignment axis of each region of the alignment layer 12, the direction of the slow axis of each region of the retardation layer can be adjusted, and the first end region and the first adjacent region of the retardation layer retard each other. With this difference, the retardation film 1 in which the second end region and the second adjacent region of the retardation layer have different retardation characteristics from each other can be obtained.

(Optical laminate with base layer)

2 is a schematic cross-sectional view schematically showing an example of the optical layered body with a base material layer of the present embodiment. In the figure, W represents the width direction. As shown in FIG. 2, the optical layered body 51 with a base layer contains the phase difference film 1 shown in FIG. 1(B) and the optical film 20, and the optical film 20 is an adhesive layer It is laminated on the retardation layer 13 of the retardation film 1 through (30).

2, the end of the adhesive layer 30 on the first end region 13a side is above the first end region 13a of the retardation layer 13, and the second end region 13b of the adhesive layer 30 The end on the) side is above the second end region 13b of the retardation layer 13. Both ends of the adhesive layer 30 are not particularly limited as long as they are on the first end region 13a and the second end region 13b, and the positions of both ends of the adhesive layer 30 are the same as the positions of both ends of the retardation layer 13 You may do it. Further, an end portion on the side of the first end region 13a of the adhesive layer 30 may be formed on the third end region 12a of the alignment layer 12, and the second end region 13b of the adhesive layer 30 may be formed. The side end portion can be formed on the fourth end region 12b of the alignment layer 12. Since the adhesive layer 30 bonds the retardation layer 13 and the optical film 20, and the alignment layer 12 and the base layer 11 do not directly adhere to the optical film 20, as described later, The base layer 11 can be peeled off from the optical layered body 51 provided with the base layer as a peeling layer.

In the retardation film 1, as described above, the first end region 13a and the first adjacent region 13c _a of the retardation layer 13 have different retardation characteristics, and also the second end region 13b. Since the and the second adjacent regions 13c _b have different phase difference characteristics, the ranges of the first end region 13a and the second end region 13b can be easily recognized. Thereby, when laminating the retardation film 1 and the optical film 20, it is via from both ends of the retardation layer 13 so that the base layer 11 can be peeled from the optical layered body 51 provided with the base layer. The adhesive layer 30 can be formed by easily grasping the position that does not come out. In addition, areas of the retardation layer 13 that do not directly contact the adhesive layer 30 are usually removed from the final product, but the adhesive layer 30 is first and second end regions 13a and 2nd end regions of the retardation layer 13. By forming on (13b), the area of the retardation layer 13 that does not directly contact the adhesive layer 30 can be reduced, so that the portion removed from the final product can be reduced.

As described above, the second slow axis of the first end region 13a of the retardation layer 13 in the retardation film 1 forms an angle of 20° or less with the orthogonal direction L (first boundary line 13p). A slow axis in the direction, and a fourth slow axis in the second end region 13b is a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L (second boundary line 13q). Further, the ends of the adhesive layer 30 in the width direction W are on the first end region 13a and on the second end region 13b. By peeling the base layer 11 from the optical layered body 51 provided with the base layer, as described later, the positions of both ends in the width direction of the retardation layer are the same as the positions of both ends in the width direction of the adhesive layer. A laminate can be obtained easily.

(Optical laminate)

3 is a schematic cross-sectional view schematically showing a state in which the release layer is peeled from the optical layered body having a base layer of the present embodiment. In the figure, W represents the width direction. As shown in FIG. 3, the optical layered body 81 is formed by laminating the optical film 20 and one layer of a retardation layer 13' (a phase difference layer-containing layer) through an adhesive layer 30. An alignment layer 12' is included on a surface opposite to the adhesive layer 30 of the layer 13'. In the retardation layer 13' and the alignment layer 12', the positions of both ends in the width direction W are the same as the positions of both ends in the width direction W of the adhesive layer 30. In the optical film 20, the positions of both ends in the width direction W may be outside the positions of both ends in the width direction W of the adhesive layer 30, and one end in the width direction W may be It may be outside the position of one end in the width direction W of the adhesive layer 30.

The alignment layer 12' has an alignment regulating force to align the liquid crystal compound contained in the retardation layer 13' formed thereon in a desired direction. Therefore, each region of the alignment layer 12' can also have an alignment axis capable of exerting a different orientation regulating force in correspondence with each region of the retardation layer 13' described later formed on the alignment layer 12. . In the alignment layer 12', the third end regions 12'a and the fourth end regions 12'b at both ends in the width direction shown by the downward downward diagonal line in FIG. 3, and the third adjacent regions adjacent to them Each of (12c _a ) and the fourth adjacent region 12c _b has an alignment axis capable of exerting an orientation regulating force capable of imparting the phase difference characteristics of each region of the retardation layer 13 ′ formed thereon.

As shown in Fig. 3, the retardation layer 13' includes a first end region 13'a including one end in the width direction W and a first end region 13' in the width direction W. a) a first adjoining region 13c _a adjoining, a second end region 13'b comprising the other end of the width direction W, and a second end region 13 in the width direction W It has a second adjacent region (13c _b ) adjacent to'b). In FIG. 3, the first end region 13'a and the second end region 13'b are indicated by diagonal upward upwards. The first boundary line 13p forming a boundary between the first end region 13'a and the first adjacent region 13c _a is straight, and the second end region 13'b and the second adjacent region 13c _b The second boundary line 13q forming the boundary of is also linear. Further, the first boundary line 13p and the second boundary line 13q are parallel to the orthogonal direction L.

The first adjacent region 13c _a has a first slow axis. The first end region 13'a has a second slow axis that is a slow axis in a direction different from the first slow axis. Further, the second adjacent region 13c _b has a third slow axis. The second end region 13'b has a fourth slow axis that is a slow axis in a direction different from the third slow axis. Therefore, in the phase difference layer 13', the phase difference characteristics of the first end region 13'a and the first adjacent region 13c _a are different from each other, and the second end region 13'b and the second adjacent region are different. The phase difference characteristics of (13c _b ) are different from each other. In addition, the second slow axis is a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L, which is a direction orthogonal to the width direction W, in the plane of the retardation layer 13', and the fourth slow axis is orthogonal. It is the slow axis in the direction forming an angle of 20° or less with the direction L. The definition of the angle formed by the second slow axis or the fourth slow axis and the orthogonal direction (L) is as described above.

In the optical layered body 81 shown in FIG. 3, the 1st boundary line 13p and the 2nd boundary line 13q are linear, and these boundary lines and the orthogonal direction L are parallel. Therefore, in the retardation layer 13', the second slow axis is a slow axis in a direction that forms an angle of 20° or less with the first boundary line 13p, and the fourth slow axis is 20° or less with the second boundary line 13q. It is the slow axis in the direction forming the angle of Definitions of the angle formed by the second slow axis and the first boundary line 13p and the angle formed by the fourth slow axis and the second boundary line 13q are as described above.

The first end region 13'a of the retardation layer 13' has a second slow axis, and the second slow axis is a slow axis in a direction that forms an angle of 20° or less with the first boundary line 13p. Preferably, this angle is more preferably 10° or less, more preferably 5° or less, and most preferably 0° (the second slow axis is orthogonal to the L direction or the first boundary line 13p is parallel). desirable. The second end region 13'b of the retardation layer 13' also has a fourth slow axis, and the fourth slow axis is the ground in a direction that forms an angle of 20° or less with the second boundary line 13q. It is preferable that it is an axis, and this angle is more preferably 10° or less, further preferably 5° or less, and most preferably 0° (the fourth slow axis and the second boundary line 13q are parallel).

The orientation state of the first end region 13'a and the orientation state of the second end region 13'b may be the same or different from each other. Moreover, the orientation state of the 1st adjoining area|region 13c _a and the orientation state of 2nd adjoining area|region 13c _b may be mutually same or different.

The state of the alignment of each region of the retardation layer 13' can be realized by adjusting the liquid crystal orientation of the liquid crystal compound constituting the retardation layer, and the liquid crystal alignment of the liquid crystal compound can be adjusted, for example, by the alignment control force of the alignment layer. And can be adjusted by the alignment axis of the alignment layer. For example, the third adjacent region 12c _a has a first alignment axis, and the third end region 12'a has a second alignment axis that is an alignment axis in a different direction from the first alignment axis, so that the first adjacent area The liquid crystal orientation of the liquid crystal compound included in the region 13c _a and the first end region 13'a can be adjusted. In addition, the second adjoining region 12c _b has a third alignment axis, and the fourth end region 12'b has a fourth alignment axis which is an alignment axis in a direction different from the third alignment axis, so that the second adjoining area The liquid crystal orientation of the liquid crystal compound included in the region 13c _b and the second end region 13'b can be adjusted.

When the first end region 13'a of the retardation layer 13' has the second slow axis of the above angle, the length in the width direction W of the first end region 13'a is usually 40 mm or less. Is preferably 20 mm or less, preferably 10 mm or less, and more preferably 5 mm or less. Further, when the second end region 13'b has the fourth slow axis of the above angle, the length of the width direction W of the second end region 13'b is usually 40 mm or less, and 20 mm or less. It is preferable, it is preferably 10 mm or less, and more preferably 5 mm or less. The lengths of the width direction W of the first end region 13'a and the second end region 13'b may be the same or different from each other. The length of the third end region 12'a in the width direction W is usually 50 mm or less, preferably 35 mm or less, more preferably 20 mm or less, and even more preferably 10 mm or less. The length of the fourth end region 12'b in the width direction W is usually 50 mm or less, preferably 35 mm or less, more preferably 20 mm or less, and even more preferably 10 mm or less. The lengths of the width direction W of the third end region 12'a and the fourth end region 12'b may be the same or different from each other.

Although the method of obtaining the optical laminated body 81 shown in FIG. 3 is not specifically limited, For example, from the optical laminated body 51 with a base material layer shown in FIG. 2, the base material layer (in a direction parallel to the orthogonal direction L) 11) (peeling layer) can be obtained by peeling. Therefore, the optical film 20 and the adhesive layer 30 constituting the optical laminate 81 may be the optical film 20 and the adhesive layer 30 of the optical laminate 51 with a base layer, respectively. The retardation layer 13' and the alignment layer 12' constituting the laminate 81 may be layers derived from the retardation layer 13 and the alignment layer 12 of the optical laminate 51 with a base layer, respectively. .

Further, the first adjacent area 13c _a , the second adjacent area 13c _b , the first boundary line 13p, the second boundary line 13q, and the third adjacent area 12c _a in the optical laminate 81 And the fourth adjoining regions 12c _b , respectively, the first adjoining regions of the retardation layer 13 (FIG. 1(B)) included in the retardation film 1 constituting the optical layered body 51 with the base layer ( 13c _a ), second adjoining region (13c _b ), first demarcation line (13p ), second demarcation line (13q ), third adjoining region (12c _a ), and fourth adjoining region (12c _b ), optical stacking The first end region 13'a, the second end region 13'b, the third end region 12'a, and the fourth end region 12'b constituting the sieve 81 are each a base layer The first end region 13a, the second end region 13b, and the third end portion of the retardation layer 13 (FIG. 1B) included in the retardation film 1 constituting the provided optical laminate 51 It may be a region derived from the region 12a and the fourth end region 12b. Incidentally, as the description of each of the layers and the respective regions, the description of the same description as the optical layered body 51 provided with the retardation film 1 and the base layer will be omitted.

When the base layer 11 is peeled off from the optical layered body 51 with a base layer shown in FIG. 2 to obtain the optical layered body 81, as shown in FIG. 3, the base layer 11 peeled off Therefore, part of the alignment layer 12 and part of the retardation layer 13 are easy to migrate. In the optical layered body 51 with a base material layer shown in FIG. 2, the length of the adhesive layer 30 in the width direction W is longer than the length of the alignment layer 12 and the retardation layer 13 in the width direction W. The ratio by which the orientation layer 12 and the retardation layer 13 are located outside the both ends of the width direction W of the adhesive layer 30 by being short, and are not fixed directly or indirectly to the adhesive layer 30 This is because it has a fixed area (the part indicated by a dot in FIG. 2).

As described above, in the optical layered body 51 with a base layer shown in FIG. 2, the end of the adhesive layer 30 on the first end region 13a side is above the first end region 13a, and the adhesive layer 30 is The end portion on the second end region 13b side is above the second end region 13b. Further, the end of the adhesive layer 30 on the first end region 13a side may be formed on the third end region 12a of the alignment layer 12, and the second end region 13b side of the adhesive layer 30 may be formed. The end of may be formed on the fourth end region 12b of the alignment layer 12. Therefore, when the base layer 11 is peeled from the optical layered body 51 provided with the base layer, the phase difference layer 13 shown in FIG. 2 includes the first end region 13a and the second end region 13b (drawings). In the middle, in the part indicated by the diagonal upward upward diagonal, the area fixed to the adhesive layer 30 (the retardation layer 13' shown in FIG. 3) and the non-fixed area moving to the base layer 11 (FIG. 2 and FIG. 3).

In the first end region 13a of the phase difference layer 13 shown in FIG. 2, the second slow axis is in a direction in which an angle of 20° or less is formed with the orthogonal direction L (or the first boundary line 13p). The slow axis, and the second end region 13b is a slow axis in a direction in which the fourth slow axis forms an angle of 20° or less with the orthogonal direction L (or the second boundary line 13q). When the first end region 13a and the second end region 13b have a slow axis in a predetermined direction, the first end region 13a and the second end region 13b are ruptured along this slow axis direction. It is easy, and it is difficult to rupture in a direction orthogonal to this slow axis direction.

Therefore, when the first end region 13a has the second slow axis of the angle, and the second end region 13b has the fourth slow axis of the angle, the peeling direction of the base layer 11 is the orthogonal direction (L ), the orientation directions of the slow axes of the first end regions 13a and the second end regions 13b are parallel or parallel to the peeling direction of the base layer 11. Therefore, when peeling off the base material layer 11, in the 1st end area 13a and the 2nd end area 13b which have the orientation direction of the slow axis parallel or parallel to this peeling direction, the phase difference layer 13 ) Tends to rupture along the peeling direction, and the retardation layer 13' and the non-fixed region are easily separated.

Thus, in the optical laminated body 51 with a base material layer shown in FIG. 2, the retardation layer 13 is the peeling direction of the base material layer 11 in the 1st end area 13a and the 2nd end area 13b. Accordingly, it is easy to separate well into the retardation layer 13' and the non-fixed region. Thereby, wrinkles generated in the rupture line portion when the phase difference layer 13 is separated from the phase difference layer 13' and the non-fixed region, and the rupture line portion is jagged and flattened in planar view due to this wrinkle. It is possible to suppress the occurrence of the problem of not being outlined. As a result, as shown in FIG. 3, the positions of both ends in the width direction W of the retardation layer 13 ′ and the alignment layer 12 ′ are both ends in the width direction W of the adhesive layer 30. The same optical laminate 81 as the position can be easily obtained.

In particular, the second slow axis of the first end region 13a has a slow axis that forms an angle of 0° with the orthogonal direction L (or the first boundary line 13p) (the second slow axis and the orthogonal direction ( L) or the first boundary line 13p is parallel), because the peeling direction of the base layer 11 and the direction of the second slow axis of the first end region 13a can be made parallel, the phase difference layer 13 In the first end region 13a, the separation of the base layer 11 along the peeling direction can be further improved. Similarly, the fourth slow axis of the second end region 13b has a slow axis that forms an angle of 0° with the orthogonal direction L (the second boundary line 13q) (the fourth slow axis and the orthogonal direction L ) Or the second boundary line 13q is parallel), because the peeling direction of the base layer 11 and the direction of the fourth slow axis of the second end region 13b can be made parallel, the phase difference layer 13 is , In the second end region 13b, along the peeling direction of the base layer 11, it can be separated even better.

On the other hand, the direction of the slow axis of the 1st end region 13a and the 2nd end region 13b is parallel to the width direction W which is the direction orthogonal to the peeling direction of the base material layer 11, or this width In a state close to the direction W and parallel, the first end region 13a and the second end region 13b are in a direction orthogonal to the peeling direction of the base layer 11 (ie, the width direction W). Or it is easy to rupture in a direction close to this. Therefore, even if the base layer 11 is peeled off, the retardation layer 13 is difficult to rupture in the peeling direction of the base layer 11 in the first end region 13a and the second end region 13b, and the phase difference layer There may be cases where (13) is not separated from the first end region 13a and the second end region 13b, or wrinkles occurring in the rupture line portion of the phase difference layer 13, or by this fold, the rupture line portion This jagged problem is likely to occur. Therefore, as described above, in the optical layered body 51 provided with the retardation film 1 and the base layer, the first end region 13a of the retardation layer 13 has a second slow axis in an orthogonal direction L and 20. It is preferable that the slow axis in a direction forming an angle of ° or less, and the second end region 13b is a slow axis in a direction in which the fourth slow axis forms an angle of 20° or less with the orthogonal direction L.

Like the optical laminate 81, in the optical laminate having an alignment layer, the third end region and the third adjacent region of the alignment layer have alignment axes in different directions, and the fourth end region and the fourth adjacent region are It may have orientation axes of different directions. By adjusting the direction of the alignment axis of each region of the alignment layer, the direction of the slow axis of each region of the phase difference layer can be adjusted, and the phase difference characteristics of the first end region and the first adjacent region of the phase difference layer are different from each other. , It is possible to obtain an optical laminate in which the second end region and the second adjacent region of the retardation layer have different retardation characteristics from each other.

〔Method for manufacturing phase difference film〕

As described above, the retardation layer 13 of the retardation film 1 contains a liquid crystal compound, and the alignment states of the first end region 13a and the first adjacent region 13c _a are different, and further, the second end portion. The orientation state of the region 13b and the second adjacent region 13c _b is also different. Therefore, it is preferable that the retardation layer 13 aligns a liquid crystal compound in the alignment state according to the area, and maintains and secures the alignment state.

The manufacturing method of the retardation film 1 is, for example, the alignment layer formation process of forming the alignment layer 12 on the base layer 11, and forming the retardation layer 13 (phase difference layer-containing layer) on the alignment layer 12. It may have a phase difference layer forming process. In the manufacturing method of the retardation film 1, it is preferable to perform the process of continuously forming the alignment layer 12 and the retardation layer 13, while continuously conveying the elongate base material layer 11.

The alignment layer 12 is not particularly limited as long as it can provide alignment properties such as horizontal alignment, vertical alignment, hybrid alignment, and inclined alignment to the liquid crystal compound included in the retardation layer. As the alignment layer 12, for example, an alignment film made of an alignment polymer, an optical alignment film using a photo-alignment polymer, or a groove alignment film, and the like, is preferably an optical alignment film using a photo-alignment polymer.

When the alignment layer 12 is an alignment film formed of an alignment polymer, the alignment regulating force can be arbitrarily adjusted according to the surface condition or rubbing conditions. In this case, in the alignment layer forming step, a composition containing an alignment polymer and a solvent (hereinafter, sometimes referred to as “orientation polymer composition”) is applied to the base layer 11 to remove the solvent, or an alignment polymer composition After coating the base layer 11 and removing the solvent, the alignment layer 12 can be formed by performing a known rubbing treatment. As a method of differentiating the orientation regulating force of the alignment layer 12 depending on the region, different kinds of alignment polymers, different surface states, different processing conditions of the rubbing treatment, etc. are mentioned. When performing the masking, different regions in the rubbing processing state can be formed by performing masking.

As a coating method of the oriented polymer composition, known methods such as a coating method such as a spin coating method, an extrusion method, a gravure coating method, a die coating method, a bar coating method, an applicator method, or a printing method such as a flexo method are mentioned. Can.

Examples of the method for removing the solvent include a natural drying method, a ventilation drying method, a heating drying method, or a reduced pressure drying method.

In addition, when the alignment layer 12 is a photo-alignment film using a photo-alignment polymer, in the alignment layer formation process, a composition comprising a polymer or monomer having a photoreactive group and a solvent (hereinafter referred to as a "photo-alignment polymer composition") Yes) to the base layer 11, and after removing the solvent, it can be obtained by irradiating polarized light. As the polarized light to be irradiated, it is preferable to use polarized ultraviolet light. The orientation layer 12 of the photo-alignment film can arbitrarily control the direction of the orientation regulating force by selecting the polarization direction of polarized light applied to the coating layer of the photo-alignment polymer composition. For this reason, by performing pattern exposure using a mask when performing polarization irradiation, it is possible to form regions with different orientation regulating forces.

As a method for applying the photo-alignment polymer composition and a method for removing the solvent, the same method as the method for applying the oriented polymer composition and the method for removing the solvent may be mentioned. For the polarization irradiation, the polarization may be directly irradiated from the coating layer of the photo-alignment polymer composition applied on the substrate layer 11, or the polarization transmitted through the substrate layer 11 by irradiating the polarization from the substrate layer 11 side. You may irradiate the said coating layer. It is preferable that it is substantially parallel light as polarization used for polarization irradiation. The wavelength of polarization used for polarization irradiation is not particularly limited as long as the photoreactive group of the polymer or monomer having a photoreactive group is in a wavelength range capable of absorbing light energy, but UV light in the range of wavelength 250 to 400 nm (ultraviolet light) ).

When the alignment layer 12 is a groove alignment film, the alignment regulating force can be arbitrarily adjusted by an uneven pattern or a plurality of grooves (grooves) on the film surface. In this case, in the alignment layer forming step, for example, a method for forming an uneven pattern by exposing, developing, or the like through an exposure mask having a pattern-shaped slit on the surface of the photosensitive polyimide film, and acting on a plate-shaped disk having grooves on the surface A method of forming an uncured layer of an energy ray-curable resin, transferring the layer to the base layer 11 to cure, forming an uncured layer of an active energy ray-curable resin in the base layer 11, and forming this layer It can be formed by, for example, a method of forming unevenness by pressing against a roll-shaped disk having irregularities, and curing.

In the retardation layer forming process, the retardation layer 13 is formed on the alignment layer 12 having different orientation regulating forces (orientation axes) depending on the region formed in the alignment layer formation process. The alignment layer 12 includes, for example, a third end region having a second alignment axis, a third adjacent region having a first alignment axis, a fourth end region having a fourth alignment axis, and a third alignment axis, as described above. It is sufficient to form a fourth adjacent region. The retardation layer 13 is, for example, by applying a composition for forming a retardation layer containing a liquid crystal compound and a solvent onto the alignment layer 12, removing the solvent, and then irradiating with ultraviolet rays, the alignment regulating force of the alignment layer 12 It can be formed by aligning the liquid crystal compound in the alignment state according to. Examples of the method for applying the composition for forming a retardation layer and the method for removing the solvent include the same method as the method for applying the oriented polymer composition and the method for removing the solvent.

As the liquid crystal compound constituting the retardation layer, it is preferable to use a polymerizable liquid crystal compound having a polymerizable group. The alignment state of the liquid crystal compound can be fixed by the polymerization reaction of the polymerizable liquid crystal compound. The polymerization reaction of the polymerizable liquid crystal compound may be a thermal polymerization reaction using a thermal polymerization initiator or a photopolymerization reaction using a photopolymerization initiator, but is preferably a photopolymerization reaction.

Although the alignment direction of the liquid crystal compound contained in the retardation layer 13 may be regulated using the alignment layer 12 as described above, when a polymerizable liquid crystal compound is used as the liquid crystal compound, it is polymerizable by performing polarization irradiation. It can also be adjusted by photo-aligning a liquid crystal compound, and expressing or improving the orientation of a polymerizable liquid crystal compound. When performing polarized light irradiation, pattern exposure is performed using a mask, whereby the alignment state of the polymerizable liquid crystal compound can be varied depending on the region. For example, among the layers containing a polymerizable liquid crystal compound, liquid crystal molecules are aligned in a predetermined direction in an exposed region exposed by pattern exposure. By performing a thermal polymerization reaction of the polymerizable liquid crystal compound in this state, a slow axis is formed in the exposure region. Thereby, the orientation state of the phase difference layer 13 can be made to differ according to a region. As for the polarization irradiated to a polymerizable liquid crystal compound, polarized ultraviolet rays are preferable.

(Method for manufacturing optical laminate with base layer)

The manufacturing method of the optical laminated body 51 with a base material layer is,

The process of preparing the retardation film (1),

A process for preparing the optical film 20,

It is preferable to have a lamination process of laminating the optical film 20 on the retardation layer 13 (retardation layer-containing layer) of the retardation film 1 through the adhesive layer 30. In the manufacturing method of the optical laminated body 51 with a base layer, it is preferable to perform each process, using these long retardation film 1 and the long optical film 20 continuously conveying them.

In the step of preparing the retardation film 1, for example, the retardation film 1 shown in Figs. 1A and 1B may be prepared, or the retardation film may be produced by the method for producing the retardation film described above. . The adhesive layer 30 may be formed on the retardation layer 13 of the retardation film 1 or may be formed on the optical film 20. In either case, in the optical layered body 51 with the base layer shown in FIG. 2, both ends of the adhesive layer 30 are on the first end region 13a of the retardation layer 13 of the retardation film 1 and second. It is preferable to form the adhesive layer 30 so as to be over the end region 13b. Further, the adhesive layer 30 may be formed such that both ends of the adhesive layer 30 are on the third end region 12a and the fourth end region 12b of the alignment layer 12.

As described above, in the retardation layer 13 of the retardation film 1, the first end region 13a and the first adjacent region 13c _a have different retardation characteristics, and also the second end region 13b. And the second adjacent region 13c _b have different phase difference characteristics. Therefore, by checking the ranges of the first end region 13a and the second end region 13b, both ends of the adhesive layer 30 in the width direction W are above the first end region 13a and the second end region. The adhesive layer 30 can be easily formed so as to be positioned on (13b).

Further, as described above, by peeling the base layer 11 from the optical layered body 51 with the base layer, the positions of both ends in the width direction of the retardation layer are the same as the positions of both ends in the width direction of the adhesive layer. A laminate can be obtained easily.

(Method for manufacturing optical laminate)

The method of manufacturing the optical laminate 81,

The process of preparing the optical laminated body 51 with a base layer,

The base layer 11 (release layer) included in the optical layered body 51 with the base layer is parallel to the orthogonal direction L, which is a direction orthogonal to the width direction W in the plane of the retardation layer 13. It is preferable to have a peeling process to peel in the direction. In the manufacturing method of an optical laminated body, it is preferable to use an optical laminated body with a long base material layer, and to perform a peeling process, conveying this continuously.

In the process of preparing the optical layered body 51 with a base material layer, the optical layered body 51 with a base material layer shown in FIG. 2 may be prepared, for example, by the manufacturing method of the optical layered body 51 with a base material layer mentioned above. You may manufacture the optical laminated body 51 provided with a base material layer. In the peeling step, it is sufficient to peel in a direction parallel to the orthogonal direction L. In the optical layered body 51 with a base layer shown in FIG. 2, the orthogonal direction L, the first boundary line 13p, and the second Since the boundary line 13q has a parallel relationship, it is possible to peel in the direction parallel to these two boundary lines.

In the peeling step, by peeling the base layer 11, the alignment layer 12 and the retardation layer 13 are located outside both ends of the adhesive layer 30 in the width direction W, and the adhesive layer 30 is Non-fixed areas (directed in dots in FIGS. 2 and 3) that are not directly or indirectly fixed, and areas fixed to the adhesive layer of the retardation layer 13 (retardation layer 13' shown in FIG. 3) And move to the base layer 11 where the non-fixed region forms a release layer. At this time, the retardation layer 13 is separated into the unfixed region and the retardation layer 13' shown in Fig. 3 in the first end region 13a and the second end region 13b.

As described above, the second slow axis of the first end region 13a is a slow axis in a direction forming an angle of 20° or less with the orthogonal direction L (or the first boundary line 13p), and the second end region 13b The fourth slow axis of is a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L (or the second boundary line 13q). Therefore, by peeling the base layer 11 in the peeling step, the retardation layer 13 sets the peeling direction of the base layer 11 in the first end region 13a and the second end region 13b. Accordingly, the phase difference layer 13' and the non-fixed region are easily separated. Therefore, in the optical layered body 81 obtained by peeling the base layer 11 by the peeling step, the retardation layer 13 is generated in the rupture line portion when separated from the retardation layer 13' and the non-fixed region. Wrinkles and the wrinkles can suppress the occurrence of a problem that becomes jagged in the planar portion of the rupture line. As a result, as shown in Fig. 3, the positions of both ends in the width direction W of the retardation layer 13' and the alignment layer 12' are both ends in the width direction W of the adhesive layer 30. The same optical laminate 81 as the position of can be easily obtained.

The retardation film of this embodiment, the optical laminated body with a base material layer, and the optical laminated body may be changed like the modified example shown below. Moreover, you may combine arbitrarily the above embodiment and the modification shown below.

(Modification 1 of the first embodiment)

In the retardation film 1 shown in FIGS. 1A and 1B described above, the first end region 13a and the second end region 13b are provided at both ends in the width direction of the retardation layer 13. Although the case has been described as an example, the retardation film may have any one of the first end region and the second end region. In this case, the retardation film may have any one of the third end region and the fourth end region of the alignment layer 12. For example, in an optical laminate having a base layer using a retardation film having a retardation layer having a first end region and not having a second end region, the base layer is formed by forming an adhesive layer on the first end region or on the first boundary line The layer can be peeled off, and when the base layer is peeled off, on the first end region side, it is possible to obtain an optical laminate in which the ends in the width direction of the adhesive layer are at the same positions as the ends of the retardation layer and the ends of the alignment layer.

(Modification 2 of the first embodiment)

In the retardation film 1 shown in FIGS. 1A and 1B described above, the second slow axis of the first end region 13a of the retardation layer 13 has an orthogonal direction L (or first). The case where the slow axis in the direction forming an angle of 20° or less with the boundary line 13p) is described as an example, but is not limited to this. The retardation film may be a slow axis in a direction in which the first slow axis of the first adjacent region 13c _a forms an angle of 20° or less with the orthogonal direction L (or the first boundary line 13p). Similarly, the fourth slow axis of the second end region 13b of the retardation layer 13 is a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L (or the second boundary line 13q). Therefore, the third slow axis of the second adjacent region 13c _b may be a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L (or the second boundary line 13q).

In this case, the end of the adhesive layer of the base layer-equipped optical layer on the first end region 13a side is preferably formed on the first adjoining region 13c _a or on the first boundary line 13p. The end portion on the side of the second end region 13b is preferably formed on the second adjacent region 13c _b or on the second boundary line 13q. In this case, the end of the adhesive layer on the first end region 13a side is above the third adjacent region 12c _a of the alignment layer 12 or the third end region 12a and the third adjacent region 12c _a. ), and the end of the adhesive layer 30 on the second end region 13b side is above the fourth adjacent region 12c _b of the alignment layer 12 or the fourth end region 12b. And the fourth adjacent region 12c _b .

Thereby, when the base layer is peeled, the base layer is peeled in the first adjoining region 13c _a or the first boundary line 13p, and in the second adjoining region 13c _b or the second bordering line 13q. As shown in Fig. 4, as shown in Fig. 4, the position of both ends of the adhesive layer 30 is the same as the position of both ends of the retardation layer 13" and the alignment layer 12" to obtain an optical laminate 82. . The retardation layer 13" included in the optical laminate 82 shown in Fig. 4 is a region derived from the first end region and the second end region of the retardation layer of the retardation film, that is, the optical laminate shown in Fig. 3. In the retardation layer 13' of 81, the first end region 13'a and the second end region 13'b which are present may not be included. In this case, the optical film 20 is , The position of both ends in the width direction W may be outside the position of both ends in the width direction W of the adhesive layer 30, and one end in the width direction W may have the width of the adhesive layer 30. It may be outside the position of one end in the direction W.

(Modification 3 of the first embodiment)

In the optical layered body 51 with the base layer shown in FIG. 2 described above, the case where both ends of the adhesive layer 30 are above the first end region 13a and the second end region 13b, respectively, is described as an example. However, it is not limited to this. The end portion of the adhesive layer 30 may be on the first boundary line 13p or on the second boundary line 13q, or may be a combination of these arbitrarily. In this case, the end portion on the side of the first end region 13a of the adhesive layer 30 can be formed at the boundary between the third end region 12a and the third adjacent region 12c _a of the alignment layer 12, , An end portion on the side of the second end region 13b of the adhesive layer 30 may be formed at a boundary portion between the fourth end region 12b and the fourth adjacent region 12c _b of the alignment layer 12.

When both ends of the adhesive layer 30 are on the first boundary line 13p and the second boundary line 13q, respectively, by peeling the substrate layer from the optical layered body provided with the substrate layer, the optical laminate shown in FIG. (82) can be obtained. The optical layered body 82 shown in FIG. 4 is a region derived from the first end region and the second end region of the phase difference layer of the retardation film, that is, the phase difference layer 13' of the optical layered body 81 shown in FIG. 3. ) Does not include the existing first end region 13'a and second end region 13'b.

(Modification 4 of the first embodiment)

In the optical laminate 81 shown in FIG. 3 described above, the case where the retardation layer 13' includes the first end region 13'a and the second end region 13'b has been described as an example. , The optical laminate may not include one or both of these end regions. When both ends of the retardation layer of the optical laminate do not have an end region, the optical laminate 82 shown in Fig. 4 can be obtained, and as shown in Fig. 4, one end of the retardation layer of the optical laminate 82 The region containing is a region derived from the first adjacent region of the retardation film, and the region containing the other end portion is a region derived from the second adjacent region of the retardation film.

(Modification 5 of the first embodiment)

The optical layered body 81 shown in FIG. 3 described above is an example in which the optical film 20, the adhesive layer 30, the retardation layer 13', and the alignment layer 12' are stacked in this order. Although the description has been given, the optical laminate may be the optical laminate 83 shown in FIG. 5. The optical laminated body 83 is obtained by laminating the optical film 20, the adhesive layer 30, and the retardation layer 13' in this order, and the alignment layer 12' of the optical laminated body 81 shown in FIG. ). In this case, the position of both ends of the adhesive layer 30 is the same as the positions of both ends of the retardation layer 13' in the width direction W of the optical laminate 83 shown in FIG. 5. Such an optical layered body 83 can be obtained by peeling the base layer 11 and the alignment layer 12 as a peeling layer, for example, from the optical layered body with the base layer shown in Fig. 2 (described later). Fig. 5). Also in this case, the position of at least one end in the width direction W of the optical film 20 may be outside the position of at least one end in the width direction W of the adhesive layer 30.

(Modification 6 of the first embodiment)

In the manufacturing method of the optical layered body 81 described above, the case where the base layer 11 is peeled from the optical layered body 51 having a base layer as a peeling layer was described as an example, but the optical layered body 51 with a base layer was described. ), the base layer 11 and the alignment layer 12 may be separated as a release layer. In this case, as shown in Fig. 5, when the peeling layer (base layer 11 and alignment layer 12) is peeled from the optical layered body provided with the base layer, the optical film 20, the adhesive layer 30, and the retardation layer (13') are stacked in this order, and the optical laminate 83 having the same position of both ends of the adhesive layer 30 and both ends of the retardation layer 13' can be obtained.

Moreover, the layer contained in a peeling layer can be set by adjusting the relationship of the adhesive force between each layer in a retardation film, for example.

Moreover, also in the modification 2 and the modification 3 of 1st Embodiment mentioned above, you may peel the base material layer and an alignment layer as a peeling layer from the optical laminated body with a base material layer. In this case, as shown in Fig. 6, when the peeling layer (base layer 11 and alignment layer 12) is peeled from the optical layered body with the base layer, the optical film 20, the adhesive layer 30, and the retardation layer (13") are stacked in this order, and the optical laminated body 84 in which the positions of both ends of the adhesive layer 30 and the both ends of the retardation layer 13" are the same can be obtained.

Also in this case, the position of at least one end in the width direction W of the optical film 20 may be outside the position of at least one end in the width direction W of the adhesive layer 30.

(Modification 7 of the first embodiment)

Although the optical layered body 51 with a base material layer shown in FIG. 2 demonstrated above has the optical film 20 as an example, it demonstrates, it is not limited to this. For example, as shown in Fig. 7A, the optical film may be an optical laminate 52 having a base layer, which is a retardation film 10. Further, as shown in Fig. 7B, the optical film may be an optical layered body 53 having a base layer which is a retardation layer 113, and as shown in Fig. 7C, the optical film is an alignment layer. The optical laminated body 54 provided with the base material layer 112 and the phase difference layer 113 may be sufficient.

The optical layered body 52 with a base material layer shown in FIG. 7(A) has a retardation layer 13 of the retardation film 1 shown in FIG. 1(B) and a retardation film 10 as the optical film 20 ), the retardation layer 103 is laminated so as to face through the adhesive layer 30. The retardation film 10 as the optical film 20 includes a base layer 101, an alignment layer 102, and a retardation layer 103 in this order. As shown in Fig. 7A, in the width direction W, the positions of both ends of the adhesive layer 30 are on the retardation layer 103 of the retardation film 10, or at both ends of the retardation layer 103. It is preferred to be the same as the position. In addition, the positions of both ends of the adhesive layer 30 and the phase difference layer 13 of the phase difference film 1 are as described above. Thereby, the adhesive layer 30 adheres the retardation layer 13 of the retardation film 1 and the retardation layer 103 of the retardation film 10, and the alignment layer 12 and the base material layer 11 are attached. Since the alignment layer 102 and the base layer 101 do not directly adhere to the retardation layer film 1 without directly adhering to the retardation film 10, the base layer is provided from the optical layered body 52 provided with the base layer. The layers 11 and 101 or the alignment layers 12 and 102 can be peeled off. The retardation film 10 may have the same structure as the retardation film 1. The retardation layer 103 included in the retardation film 10 as the optical film 20 may have the same retardation characteristics throughout, and the retardation characteristics of the retardation film 1 are different. It may have. The alignment layer 102 of the retardation film 10 may have a different orientation regulating force for each region according to the retardation characteristics of each region of the retardation layer 103 formed thereon.

The optical layered body 53 provided with the base material layer shown in FIG. 7B is an optical film 20 through the adhesive layer 30 on the retardation layer 13 of the retardation film 1 shown in FIG. 1B. The phase difference layer 113 as) is stacked. The optical layered body 53 with a base layer can be obtained, for example, by peeling the base layer 101 and the alignment layer 102 from the optical layered body 52 with a base layer ((A) in FIG. 7) ( The phase difference layer 113 shown in FIG. 7B is obtained from the phase difference layer 103 shown in FIG. 7(B) and FIG. 7(A). In this case, the region located outside the both ends of the retardation layer 103 in the width direction W of the adhesive layer 30 is an unfixed region that is not directly fixed to the adhesive layer 30. As shown in B), a part of the retardation layer 103 is easy to migrate to the peeled base layer 101 and the alignment layer 102. Therefore, when the base layer and the alignment layer are peeled off from the optical layered body 51 provided with the base layer (Fig. 2), for example, by using a retardation film 10 having the same retardation characteristics as the retardation film 1 By the same principle as in Fig. 3, the retardation layer 103 of the retardation film 10 can be easily broken along the peeling direction when peeling the base layer 101 and the alignment layer 102. In addition, by this, wrinkles generated in the rupture line portion when the phase difference layer 103 is separated from the phase difference layer 113 and the non-fixed region, or the rupture line portion is jagged in planar view due to the wrinkles. It can also suppress the occurrence of a problem that it does not become a neat outline. In the optical layered body 53 with a base material layer thus obtained (Fig. 7(B)), in the width direction W, the positions of both ends of the retardation layer 113 and the positions of both ends of the adhesive layer 30 are You can do the same.

The optical layered body 54 with a base material layer shown in FIG. 7C is an optical film 20 through an adhesive layer 30 on the retardation layer 13 of the retardation film 1 shown in FIG. 1B. ), the retardation layer 113 and the alignment layer 112 are stacked in this order. The optical layered body 54 with a base layer can be obtained, for example, by peeling the base layer 101 from the optical layered body 52 with a base layer (FIG. 7A) (FIG. 7C) , Retardation layer 113 and alignment layer 112 shown in Fig. 7C are obtained from each of the retardation layer 103 and alignment layer 102 shown in Fig. 7A. In this case, the regions located outside the both ends of the retardation layer 103 and the alignment layer 102 in the width direction W of the adhesive layer 30 are not fixed directly or indirectly to the adhesive layer 30. Since it is a non-fixed region, as shown in FIG. 7C, a portion of the retardation layer 103 and the alignment layer 102 are easily transferred to the peeled base layer 101. Therefore, when the base layer and the alignment layer are peeled off from the optical layered body 51 provided with the base layer (Fig. 2), for example, by using a retardation film 10 having the same retardation characteristics as the retardation film 1 With the same principle as in Fig. 3, the retardation layer 103 of the retardation film 10 can be easily broken along the peeling direction when peeling the base layer 101. In addition, this also suppresses the occurrence of the above-mentioned wrinkles and problems in the rupture line portion when the phase difference layer 103 is separated from the phase difference layer 113 into a non-fixed region. In the optical layered body 54 with the base layer obtained in this way (Fig. 7(C)), the position of both ends of the retardation layer 113 and the alignment layer 112 in the width direction W is the adhesive layer 30. It can be the same as the position of both ends of the.

[Second Embodiment]

This embodiment is different from the first embodiment in that it has a retardation layer-containing layer including two retardation layers. Hereinafter, the same reference numerals are assigned to the same members as those described in the previous embodiment, and the descriptions thereof are omitted.

〔Phase difference film〕

8A is a schematic cross-sectional view schematically showing an example of the retardation film of the present embodiment. In the figure, W represents the width direction. In this embodiment, since the optical layered body 53 provided with the base layer shown in Fig. 7B described in Modification 7 of the first embodiment is used as a retardation film, this embodiment shown in Fig. 8A The retardation film 100 of the form is equivalent to the optical layered body 53 with a base layer shown in FIG. 7B.

As shown in FIG. 8(A), the retardation film 100 includes a base layer 11, an alignment layer 12, and a retardation layer-containing layer 130 in this order, and the retardation layer-containing layer 130 is , In order from the alignment layer 12 side, the first retardation layer 13, the retardation layer adhesive layer 15, and the second retardation layer 113 are included in this order. The first retardation layer 13 corresponds to the retardation layer 13 shown in Fig. 7B, but in the present embodiment, the first retardation layer 13 is different from the second retardation layer 113. ).

The retardation film 100 has the same length in the width direction of the adhesive layer 15 for the retardation layer and the second retardation layer 113 in the cross section in the width direction W, and the width of the first retardation layer 13 It can be made shorter than the length of the direction. In addition, the positions of the both ends of the adhesive layer for retardation layer 15 and the second retardation layer 113 in the width direction may be inside the positions in the width direction of both ends of the first retardation layer 13. Moreover, the length in the width direction of the adhesive layer 15 for retardation layers and the 2nd retardation layer 113 is not limited to the example shown to FIG. 8(A), and the length in the width direction of the 1st retardation layer 13 The same or may be longer than the length of the first retardation layer 13 in the width direction, and the positions of the first and second retardation layers for the retardation layer adhesive layer 15 and the second retardation layer 113 in the width direction may be the first retardation layer 13 ) May be the same as the position in the width direction at both ends, or may be outside the position in the width direction at both ends of the first retardation layer 13. Moreover, the length in the width direction of the adhesive layer 15 for retardation layers may be the same as or different from the length in the width direction of the 2nd retardation layer 113.

About the base material layer 11 and the alignment layer 12, since it is as having demonstrated in the above-mentioned embodiment, the description is abbreviate|omitted. Note that the first retardation layer 13 corresponds to the retardation layer 13 shown in Fig. 7B, and the retardation layer 13 has been described in the above embodiments, and thus its description is omitted.

The second retardation layer 113 includes a first end region 113a including one end in the width direction W and a first end region in the width direction W, as shown in Fig. 8A. The first adjacent region 113c _a adjacent to 113a, the second end region 113b including the other end of the width direction W, and the second end region 113b in the width direction W It has a second adjacent region (113c _b ) adjacent to. In FIG. 8A, the first end region 113a and the second end region 113b are indicated by diagonal upward upwards. In the second retardation layer 113, the first boundary line 113p forming the boundary between the first end region 113a and the first adjacent region 113c _a is straight, and the second end region 113b and the second adjacent region The second boundary line 113q forming the boundary of the area 113c _b is also straight. Moreover, the 1st boundary line 113p and the 2nd boundary line 113q are parallel to the orthogonal direction L orthogonal to the width direction W in the planar view of the phase difference film 100.

The first adjacent region 113c _a of the second phase difference layer 113 has a first' slow axis. The first end region 113a has a second' slow axis which is a slow axis in a direction different from the first' slow axis. Also, the second adjacent region 113c _b has a 3'slow axis. The second end region 113b has a fourth' slow axis, which is a slow axis in a direction different from the third' slow axis.

Since the descriptions of the above-described respective regions, each boundary line, and each slow axis of the second retardation layer 113 are the same as those of the retardation layer 13 ((A) and (B) in FIG. 1) described in the previous embodiment, Omit the description. Specifically, the first end region 113a, the second end region 113b, the first adjacent region 113c _a , the second adjacent region 113c _b , and the first boundary line of the second phase difference layer 113 ( 113p) and the second boundary line 113q are respectively the first end regions 13a and the second end regions 13b of the retardation layer 13 ((A) and (B) in FIG. 1) described in the previous embodiment. ), the first adjoining area 13c _a , the second adjoining area 13c _b ), the same as the description of the first boundary line 13p and the second boundary line 13q. In addition, the 1'-4' slow axis of each region is the description of the 1-4 slow axis of each region of the retardation layer 13 ((A) and (B) of FIG. 1) described in the previous embodiment. Is the same as

The state of the alignment of each region of the second retardation layer 113 can be realized by adjusting the liquid crystal orientation of the liquid crystal compound constituting the second retardation layer, and the liquid crystal alignment of the liquid crystal compound is, for example, dependent on the alignment control force of the alignment layer. Can be adjusted. In the retardation film 100 shown in FIG. 8(A), although the alignment layer for regulating the orientation of the second retardation layer 113 is not shown, as described in the manufacturing method of the retardation film 100 described later, The state of orientation of each region of the second phase difference layer 113 can also be realized by an alignment layer separate from the alignment layer 12.

In addition, each of the above descriptions of the first retardation layer 13 and the second retardation layer 113 is the same as the description of the retardation layer 13 ((A) and (B) in FIG. 1) described in the previous embodiment. , The first retardation layer 13 and the second retardation layer 113 may have different structures, or may have the same structure.

Since the first retardation layer 13 and the second retardation layer 113 have the above-described retardation characteristics, as described in the previous embodiment, the light transmittance of the retardation film 100 is observed using a mirror, a polarizing plate, or the like. When it does, the ranges of the first end regions 13a and 113a and the second end regions 13b and 113b can be easily recognized. In addition, although the details will be described later, the positions of both ends of the first retardation layer 13 and the second retardation layer 113 in the width direction of the optical layered body with the base layer described later are positions of both ends in the width direction of the adhesive layer. The same optical laminate as can be easily obtained.

(Optical laminate with base layer)

8B is a schematic cross-sectional view schematically showing an example of the optical layered body with a base layer according to the present embodiment. In the figure, W represents the width direction. As shown in FIG. 8(B), the optical layered body 151 with a base layer includes the retardation film 100 and the optical film 20 shown in FIG. 8(A), and the optical film 20 ) Is laminated on the second retardation layer 113 of the retardation layer-containing layer 130 included in the retardation film 100 through the adhesive layer 30.

It is preferable that both ends of the width direction W of the adhesive layer 30 are the same as the positions of both ends of the phase difference layer-containing layer 130, or are located inside the width direction W than the positions of both ends of the phase difference layer-containing layer 130. Do.

Thereby, the adhesive layer 30 adheres the retardation layer-containing layer 130 and the optical film 20, and the alignment layer 12 and the base layer 11 do not directly adhere to the optical film 20. As described later, the base layer 11 and the alignment layer 12 can be peeled from the optical layered body 151 provided with the base layer as a peeling layer.

As shown in FIG. 8(B), the end of the adhesive layer 30 on the first end region 113a side is above the first end region 113a of the second retardation layer 113, and of the adhesive layer 30 The end portion on the second end region 113b side is above the second end region 113b. Both ends of the adhesive layer 30 are not particularly limited as long as they are on the first end region 113a and on the second end region 113b, and the positions of both ends of the adhesive layer 30 are positioned at both ends of the second retardation layer 113 May be the same as Incidentally, the positional relationship of each region constituting the adhesive layer 30, the first retardation layer 13, and the alignment layer 12 is the same as that described in the previous embodiment, and thus its description is omitted.

In the optical layered body 151 with a base layer shown in FIG. 8B, the second slow axis of the first end region 13a of the first retardation layer 13 in the retardation film 100 has an orthogonal direction ( L) (first boundary line 13p) is a slow axis in a direction forming an angle of 20° or less, and the fourth slow axis of the second end region 13b is an orthogonal direction L (second boundary line 13q). It may be a slow axis in a direction forming an angle of 20° or less.

Further, the second' slow axis of the first end region 113a of the second retardation layer 113 in the retardation film 100 has an angle of 20° or less with the orthogonal direction L (first boundary line 113p) And a 4′ slow axis of the second end region 113b may be a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L (second boundary line 113q). Further, the end portion in the width direction W of the adhesive layer 30 is above the first end region 13a and the second end region 13b of the first retardation layer 13, and further, the second retardation layer ( Over the first end region 113a and over the second end region 113b. In addition, an end portion in the width direction W of the adhesive layer 30 may be formed on the third end region 12a and the fourth end region 12b of the alignment layer 12.

Thereby, by peeling the base layer 11 and the alignment layer 12 from the optical layered body 151 with a base layer, as described later, the first phase difference layer and the second phase difference included in the phase difference layer-containing layer. The optical laminated body in which the positions of both ends in the width direction of the layer are the same as the positions of both ends in the width direction of the adhesive layer can be easily obtained.

(Optical laminate)

8C is a schematic cross-sectional view schematically showing an example of the optical laminate of the present embodiment. In the figure, W represents the width direction. As shown in FIG. 8(C), the optical layered body 181 is formed by laminating the optical film 20 and the retardation layer-containing layer 130' through the adhesive layer 30. The retardation layer-containing layer 130' shown in FIG. 8C includes a first retardation layer 13', an adhesive layer 15 for retardation layer, and a second retardation layer 113', and the adhesive layer 30. Silver is formed on the second retardation layer 113' of the retardation layer-containing layer 130'. As shown in FIG. 8C, in the optical layered body 181, both ends in the width direction of the first retardation layer 13' and the second retardation layer 113' included in the retardation layer-containing layer 130'. The position of is the same as the position of both ends in the width direction of the adhesive layer 30. In the optical film 20, the positions of both ends in the width direction W may be outside the positions of both ends in the width direction W of the adhesive layer 30, and at least one end in the width direction W may be provided. , May be outside the position of one end in the width direction W of the adhesive layer 30.

The first retardation layer 13', the adhesive layer 30 and the optical film 20, respectively, and the retardation layer 13', the adhesive layer 30 and the optical film 20 (FIG. 3) described in the above-described embodiment, Since it can be made the same, the description is omitted.

The second retardation layer 113' is formed in a first end region 113'a including one end in the width direction W and a width direction W, as shown in Fig. 8C. In the first adjacent area 113c _a adjacent to the one end area 113'a, the second end area 113'b including the other end in the width direction W, and in the width direction W It has a second adjoining region 113c _b adjacent to the second end region 113'b. In FIG. 8C, the first end region 113'a and the second end region 113'b are indicated by diagonal upward upwards. The first boundary line 113p forming a boundary between the first end region 113'a and the first adjacent region 113c _a is straight, and the second end region 113'b and the second adjacent region 113c _b The second boundary line 113q forming the boundary of the line is also straight. Further, the first boundary line 113p and the second boundary line 113q are parallel to the orthogonal direction L.

The first adjacent region 113c _a has a first' slow axis. The first end region 113'a has a second' slow axis, which is a slow axis in a direction different from the first' slow axis. Also, the second adjacent region 113c _b has a 3'slow axis. The second end region 113'b has a fourth' slow axis, which is a slow axis in a direction different from the third' slow axis.

Descriptions of each region, each boundary line, and each slow axis of the second retardation layer 113' are the same as those of the retardation layer 13' (FIG. 3) described in the previous embodiment, and thus description thereof is omitted. Specifically, the first end region 113'a, the second end region 113'b, the first adjacent region 113c _a , and the second adjacent region 113c _{b of} the second retardation layer 113' , The first boundary line 113p and the second boundary line 113q are respectively the first end region 13'a and the second end region 13 of the retardation layer 13' (FIG. 3) described in the previous embodiment. 'b), the first adjacent area (13c _a ), the second adjacent area (13c _b ), the first boundary line (13p) and the same as the description of the second boundary line (13q). In addition, the 1'-4' slow axis of each region is the same as the description of the 1-4 slow axis of each region of the retardation layer 13 (FIG. 3) described in the previous embodiment.

The state of the alignment of each region of the second retardation layer 113' can be realized by adjusting the liquid crystal orientation of the liquid crystal compound constituting the second retardation layer, and the liquid crystal alignment of the liquid crystal compound is, for example, the alignment regulating force of the alignment layer. Can be adjusted by. In the optical layered body 181 shown in Fig. 8C, the alignment layer for regulating the orientation of the second retardation layer 113' is not shown, but as described in the method for manufacturing the optical layered body 181 to be described later. Similarly, the state of orientation of each region of the second retardation layer 113' can also be realized by an alignment layer separate from the alignment layer 12 used to form the first retardation layer 13'. .

Note that the above descriptions of the first retardation layer 13' and the second retardation layer 113' are the same as the descriptions of the retardation layer 13' (FIG. 3) described in the previous embodiment, but the first retardation layer The (13') and the second retardation layer (113') need not have the same structure, but may have different structures.

The method for obtaining the optical layered body 181 shown in Fig. 8C is not particularly limited, but, for example, from the optical layered body 151 provided with the base layer shown in Fig. 8B to the orthogonal direction L. It can be obtained by peeling the base layer 11 and the alignment layer 12 (release layer) in a direction parallel to the direction. Therefore, the optical film 20 and the adhesive layer 30 constituting the optical laminate 181 may be the optical film 20 and the adhesive layer 30 of the optical laminate 151 provided with a base layer, respectively. The first retardation layer 13' and the second retardation layer 113' constituting the laminate 181 are respectively the first retardation layer 13 and the second retardation layer of the optical layered body 151 provided with the base layer ( 113). In addition, the first adjacent region 13c _a , the second adjacent region 13c _b , the first boundary line 13p and the second boundary line 13q of the first retardation layer 13 ′ in the optical laminate 181 , The first adjacent area 113c _a , the second adjacent area 113c _b , the first boundary line 113p and the second boundary line 113q of the second retardation layer 113 ′ are each provided with a base layer and an optical laminate. The first adjacent region 13c _a , the second adjacent region 13c _b , and the first boundary line of the first retardation layer 13 included in the retardation film 100 ((A) of FIG. 8) constituting (151) (13p) and the second boundary line 13q, the first adjacent area 113c _a of the second phase difference layer 113, the second adjacent area 113c _b ), the first boundary line 113p, and the second boundary line 113q Can be In addition, the first end region 13'a and the second end region 13'b of the first retardation layer 13' constituting the optical laminate 181, the first end region 113 of the second retardation layer The first retardation layer 13 included in the retardation film 100 ((A) of FIG. 8) forming the optical layered body 151 provided with the base layer is'a) and the second end regions 113'b, respectively. It may be a region derived from the first end region 13a and the second end region 13b, the first end region 113a and the second end region 113b of the second retardation layer 113.

When the optical layered body 181 is obtained by peeling the base layer 11 and the alignment layer 12 from the optical layered body 151 with a base layer shown in FIG. 8B as described above, FIG. As shown in C), a part of the retardation layer-containing layer 130 tends to migrate toward the peeled base layer 11 and the alignment layer 12 side. This, in the optical layered body 151 with a base layer shown in Fig. 8B, the length in the width direction W of the adhesive layer 30 is shorter than the length in the width direction W of the phase difference layer-containing layer 130. Thereby, the retardation layer-containing layer 130 is located outside the both ends of the width direction W of the adhesive layer 30, and is not fixed to the adhesive layer 30 either directly or indirectly. This is because (B) has a portion indicated by a dot).

As described above, in the optical layered body 151 provided with the base layer shown in Fig. 8B, the end portion in the width direction W of the adhesive layer 30 is the first end region of the first retardation layer 13 ( 13a) above and above the second end region 13b, and also above the first end region 113a and the second end region 113b of the second retardation layer 113.

In addition, in the optical layered body 151 with a base layer, the end portion in the width direction W of the adhesive layer 30 is placed on the third end region 12a and the fourth end region 12b of the alignment layer 12. Can form. Therefore, when the base layer 11 and the alignment layer 12 are peeled from the optical layered body 151 provided with the base layer, the retardation layer-containing layer 130 is a region fixed to the adhesive layer 30 (Fig. 8(C) The phase difference layer-containing layer 130' shown in) and the non-fixed regions (parts (B) and (C) in Fig. 8) that are transferred to the release layer (base layer 11 and alignment layer 12) ).

Moreover, the 1st phase difference layer 13 shown in FIG. 8B has the phase difference characteristic demonstrated in the above-mentioned embodiment. Also, in the first end region 113a of the second phase difference layer 113 shown in FIG. 8B, the second' slow axis is 20° with the orthogonal direction L (or the first boundary line 113p). The slow axis in the direction forming the following angle, and the 4′ slow axis in the second end region 113b is also the slow axis in the direction forming an angle of 20° or less with the orthogonal direction L (or second boundary line 113q). Therefore, when the peeling layer (base layer 11 and alignment layer 12) is peeled from the optical layered body 151 provided with the base layer in the orthogonal direction L orthogonal to the width direction W in the plan view, , Retardation layer-containing layer along the peeling direction of the peeling layer by the same principle as when peeling the base layer and the alignment layer (Fig. 3) from the optical layered body 51 with the base layer described in the previous embodiment (Fig. 2) 130).

In this way, in the optical layered body 151 with a base layer shown in Fig. 8B, the retardation layer-containing layer 130 is retardation layer-containing layer 130' along the peeling direction of the peeling layer (Fig. 8(C )) and the non-fixed region, it is easy to separate well. Thereby, wrinkles generated in the rupture line portion when the retardation layer-containing layer 130 is separated from the retardation layer-containing layer 130' into a non-fixed region, or due to this fold, this rupture line portion is in planar view. It can suppress the occurrence of the problem that it becomes jagged and does not have a neat outline. As a result, as shown in Fig. 8(C), the width of the retardation layer-containing layer 130', that is, the first retardation layer 13', the adhesive layer 15' for the retardation layer, and the second retardation layer 113' The optical laminated body 181 in which the positions of both ends in the direction W are the same as the positions of both ends in the width direction W of the adhesive layer 30 can be easily obtained.

Like the optical laminate 181, in the optical laminate having an alignment layer, the third end region and the third adjacent region of the alignment layer have alignment axes in different directions, and the fourth end region and the fourth adjacent region are It may have orientation axes of different directions. By adjusting the direction of the alignment axis of each region of the alignment layer, the direction of the slow axis of each region of the first retardation layer can be adjusted, and the first end region and the first adjacent region of the first retardation layer retard each other. It is possible to obtain an optical layered body having different characteristics and different phase difference characteristics between the second end region and the second adjacent region of the first phase difference layer.

〔Method for manufacturing phase difference film〕

9A and 9B are schematic cross-sectional views showing an example of a manufacturing process of the phase difference film 100 shown in FIG. 8A. It may have a process of forming the retardation film 1 and a process of forming the second retardation layer 113 on the first retardation layer 13 of the retardation film 1 through the adhesive layer 15 for the retardation layer. The process of forming the retardation film 1 is as described in the above-described embodiments, and the alignment layer formation process of forming the alignment layer 12 on the base layer 11 and the phase difference layer 13 on the alignment layer 12 It includes the process of forming. In the method of manufacturing the retardation layer film 100, the step of forming the retardation layer 13 and the step of forming the second retardation layer 113 form a retardation layer-containing layer 130 on the alignment layer 12. It becomes a phase difference layer formation process. In the method of manufacturing the retardation film 100, while continuously conveying the long base layer 11, the alignment layer 12, the first retardation layer 13, the adhesive layer 15 for the retardation layer, and the second retardation layer ( It is preferable to perform the step of forming 113).

Regarding the step of forming the alignment layer 12 and the first retardation layer 13 on the base layer 11 in this order, the alignment layer 12 and the phase difference on the base layer 11 described in the above embodiments are described. Since it is the same as the process of forming the layer 13, the description is omitted.

The process of forming the second retardation layer 113 can be performed, for example, by using the retardation film 10. The retardation film 10 has the same structure as the retardation film 1, and as shown in Fig. 9A, the base layer 101, the alignment layer 102, and the retardation layer 103 are in this order. Include as. The retardation characteristics of the retardation layer 103 can be adjusted by the orientation regulating force of the alignment layer 102. The process of forming the second retardation layer 113 includes a step of laminating the retardation film 1 and the retardation film 10 through the adhesive layer 15 for the retardation layer, and the base layer 101 included in the retardation film 10 ) And the step of peeling the alignment layer 102 may be included.

In the step of laminating, the retardation film 1 and the retardation film 10, as shown in Fig. 9 (A), the retardation layer 13 and the retardation layer 103 through the adhesive layer 15 for the retardation layer. They are stacked facing each other. Then, in the said peeling process, the base material layer 101 and the orientation layer 102 on the phase difference film 10 side are peeled (FIG. 9B). It is preferable to peel the base layer 101 and the alignment layer 102 in a direction parallel to the orthogonal direction L orthogonal to the width direction W within the plane of the retardation film 10.

The adhesive layer 15 for a retardation layer can be formed so that the position of both ends of the width direction W is above the retardation layer 103, as shown in Fig. 9A. In this case, an area (the dot portion in Fig. 9A) located outside both ends of the retardation layer 103 in the width direction W of the retardation layer adhesive layer 15 is directly attached to the retardation layer adhesive layer 15. Because it is a non-fixed region that is not fixed to, when peeling the base layer 101 and the alignment layer 102, as shown in Fig. 9(B), the peeling side (base layer 101 and alignment layer ( 102) side), a part of the retardation layer 103 is easy to migrate. Thereby, the 2nd retardation layer 113 is formed from the retardation layer 103, and the retardation film 100 which has the 1st retardation layer 13 and the 2nd retardation layer 113 can be manufactured (FIG. 9 (B)).

By using the retardation film 10 having the same retardation characteristics as the retardation film 1, the base layer and the alignment layer are peeled off from the optical layered body 51 having the base layer described in the previous embodiment (FIG. 2). By the same principle as in the case (Fig. 3), the retardation layer 103 of the retardation film 10 can be easily broken along the peeling direction when peeling the base layer 101 and the alignment layer 102. . As a result, wrinkles generated in the rupture line portion when the phase difference layer 103 is separated from the phase difference layer 113 into a non-fixed region, or the rupture line portion is jagged in planar shape due to the wrinkles. It can also suppress the occurrence of the problem that this does not occur. In this way, in the obtained retardation film 100, as shown in Fig. 9(B), the positions of both ends of the retardation layer 113 in the width direction W are at both ends of the adhesive layer 15 for a retardation layer. You can do the same with the location.

As will be described later, when the optical layered body 151 with the base layer is obtained from the retardation film 100 and the optical layered body 181 is manufactured, as described above, the second retardation layer 113 also has an adhesive layer 30. ), and is separated into a non-fixed region (second retardation layer 113' shown in FIG. 8C). Therefore, the retardation characteristic of the retardation layer 103 of the retardation film 10 is that the retardation layer 103 is favorably separated when the base layer 101 and the alignment layer 102 are peeled off, and the base layer is provided. When peeling the peeling layer (base layer 11 and alignment layer 12) from the optical layered body 151, it is preferable to select so that the second retardation layer 113 is well separated.

For example, in the phase difference layer 103, regions corresponding to the first end region 13a, the second end region 13b, the first adjacent region 13c _a and the second adjacent region 13c _b are formed. In addition ((A) and (B) in Fig. 1), the above-described first end region 113a, second end region 113b, first adjacent region 113c _a and second adjacent region 113c _b ) By forming (Fig. 8(A)), the separation of the above-described phase difference layer 103 and phase difference layer 113 twice can be made favorable. In this case, the first end region 13a and the first end region 113a may be the same region or different regions, and similarly, the second end region 13b, the second end region 113b, and the first adjacent region The 13c _a and the first adjacent areas 113c _a and the second adjacent areas 13c _b and the second adjacent areas 113c _b may be the same area or different areas. When the first end region 13a and the first end region 113a are different regions, in the retardation layer 103 of the retardation film 10, the first end region 13a is greater than the first end region 113a. It is preferable that it is outside the width direction W. Similarly, when the second end region 13b and the second end region 113b are different regions, in the retardation layer 103 of the retardation film 10, the second end region 13b is the second end region 113b It is preferable to be outside the width direction W than ).

(Method for manufacturing optical laminate with base layer)

The manufacturing method of the optical laminated body 151 with a base layer,

A process for preparing the retardation film 100 (Fig. 8 (A)),

A process for preparing the optical film 20,

It is preferable to have a lamination process of laminating the optical film 20 on the retardation layer-containing layer 130 of the retardation film 100 through the adhesive layer 30 (Fig. 8(B)). In the manufacturing method of the optical laminated body 151 with a base layer, it is preferable to perform each process, using these long retardation film 100 and long optical film 20 continuously conveying them.

In the step of preparing the retardation film 100, for example, the retardation film 100 shown in FIG. 8(A) may be prepared, or the retardation film 100 may be produced by the method for producing the retardation film. The adhesive layer 30 may be formed on the retardation layer-containing layer 130 of the retardation film 100 or may be formed on the optical film 20.

(Method for manufacturing optical laminate)

The manufacturing method of the optical laminated body 181 includes the process of preparing the optical laminated body 151 with a base layer ((B) of FIG. 8 ),

The orthogonal direction which is the direction orthogonal to the width direction W in the plane of the phase difference layer containing layer 130 in the base layer 11 and the alignment layer 12 (release layer) included in the optical layered body 151 with a base layer It is preferable to have the peeling process of peeling in the direction parallel to (L) (FIG. 8(C)). In the manufacturing method of the optical laminated body 181, it is preferable to perform a peeling process, conveying this continuously using the optical laminated body 151 with a long base material layer.

In the process of preparing the optical layered body 151 with a base layer, for example, the optical layered body 151 with a base layer shown in FIG. You may manufacture the optical laminated body 151 with a base material layer by this. In the peeling step, it is sufficient to peel in a direction parallel to the orthogonal direction L. In the optical layered body 151 with a base layer shown in FIG. 8B, the orthogonal direction L and the first boundary line 13p , 113p) and the second boundary lines 13q and 113q are in a parallel relationship, so that the two boundary lines can be separated in a parallel direction. By this, as described above, the phase difference layer-containing layer 130' shown in Fig. 8C, that is, the first phase difference layer 13', the adhesion layer 15' for the phase difference layer, and the second phase difference layer 113'. The position of both ends in the width direction W of the same, the optical layered body 181, which is the same as the position of both ends in the width direction W of the adhesive layer 30, can be easily obtained.

The retardation film of this embodiment, the optical laminated body with a base material layer, and the optical laminated body may be changed like the modified example shown below.

(Modified example 1 of the second embodiment)

In the retardation film 100 shown in Fig. 8A described above, the first end regions 13a, 113a and the first end regions 13a, 113a are formed at both ends of the first retardation layer 13 and the second retardation layer 113 in the width direction. Although the case where the two end regions 13b and 113b are provided is described as an example, the retardation film may have any one of the first end region and the second end region. In this case, the retardation film may have any one of the third end region and the fourth end region of the alignment layer 12.

(Modified example 2 of the second embodiment)

In the retardation film 100 shown in FIG. 8(A) described above, the second, 2'ground of the first end regions 13a, 113a of the first retardation layer 13 and the second retardation layer 113 Although the case where the axis is a slow axis in a direction that forms an angle of 20° or less with the orthogonal direction L (or the first boundary line 13p) has been described as an example, the retardation film has a first adjacent region 13c _a , 113c _a ) May be a slow axis in a direction in which the first and 1'slow axes form an angle of 20° or less with the orthogonal direction L (or the first boundary lines 13p and 113p). Similarly, the 4th and 4'slow axes of the first retardation layer 13 and the second end regions 13b and 113b of the second retardation layer 113 are in the orthogonal direction L (or the second boundary lines 13q and 113q). )), instead of being the slow axis in the direction forming an angle of 20° or less, the third and 3'slow axes of the second adjacent regions 13c _b and 113c _b are in the orthogonal direction L (or the second boundary line ( 13q, 113q)) may be a slow axis in a direction that forms an angle of 20° or less.

In this case, the ends of the adhesive layer of the optical layered body with the base layer on the first end regions 13a and 113a side are formed on the first adjacent regions 13c _a and 113c _a or on the first boundary lines 13p and 113p. It is preferable that the ends of the adhesive layer on the second end regions 13b and 113b are preferably formed on the second adjacent regions 13c _b and 113c _b or on the second boundary lines 13q and 113q. In this case, the end of the adhesive layer on the first end region 13a side is above the third adjacent region 12c _a of the alignment layer 12 or the third end region 12a and the third adjacent region 12c _a. ), and the end of the adhesive layer 30 on the second end region 13b side is above the fourth adjacent region 12c _b of the alignment layer 12 or the fourth end region 12b. And the fourth adjacent region 12c _b . Thereby, the optical laminated body in which the position of the both ends of the adhesive layer 30 is the same as the position of both ends of the phase difference layer containing layer can be obtained (refer to the optical laminated body 184 shown in FIG. 11A to be described later). . The first retardation layer and the second retardation layer included in the optical laminate are regions derived from the first and second end regions of the first and second retardation layers of the retardation film, that is, FIG. 8. The first end regions 13'a, 113'a and the second end regions present in the first retardation layer 13' and the second retardation layer 113' of the optical laminate 181 shown in (C) It can be said that (13'b, 113'b) is not included.

In this case, the optical film 20 may have the positions of both ends in the width direction W outside the positions of both ends in the width direction W of the adhesive layer 30, and one end in the width direction W The adhesive layer 30 may be outside the position of one end in the width direction W.

(Modification 3 of the second embodiment)

In the retardation film 100 shown in Fig. 8A described above, the base layer 11, the alignment layer 12, the first retardation layer 13, the retardation layer adhesive layer 15, the second retardation layer ( Although the case where 113) was laminated in this order was described as an example, it is also possible to have the alignment layer 112 on the second retardation layer 113 (FIG. 10). The alignment layer 112 has an orientation regulating force that adjusts the phase difference characteristics of the second phase difference layer 113. Such a retardation film can be produced by peeling the base layer 101 from the lamination of the retardation film 1 and the retardation film 10 shown in Fig. 9A through the adhesive layer 15 for a retardation layer. . In this case, the alignment layer 112 shown in Fig. 10 is a layer derived from the alignment layer 102 shown in Fig. 9A.

(Modification 4 of the second embodiment)

In the retardation film 100 shown in Fig. 8A described above, the two retardation layers (the first retardation layer 13 and the second retardation layer 113) included in the retardation layer-containing layer are retardation characteristics. Although the case having this different region was described as an example, one of the phase difference layers may have a region having different phase difference characteristics, and the other phase difference layer may have the same phase difference characteristics throughout.

(Modification 5 of the second embodiment)

In the retardation film 100 shown in Fig. 8A described above, the case where the retardation layer-containing layer has two retardation layers has been described as an example, but three or more retardation layers may be included. When the phase difference layer-containing layer includes three or more phase difference layers, three or more phase difference layers may be stacked by forming an adhesive layer for the phase difference layers between the phase difference layers. In such a retardation layer-containing layer, it is sufficient that at least one retardation layer included in the retardation layer-containing layer has a region having different retardation characteristics.

(Modification 6 of the second embodiment)

In the optical layered body 151 with a base layer shown in Fig. 8B described above, both ends of the adhesive layer 30 are respectively on the first end regions 13a and 113a and on the second end regions 13b and 113b. ) Although the above case is described as an example, the end portions of the adhesive layer 30 may be on the first boundary lines 13p and 113p or on the second boundary lines 13q and 113q, or may be in any combination of these. In this case, the end portion on the side of the first end region 13a of the adhesive layer 30 can be formed at the boundary between the third end region 12a and the third adjacent region 12c _a of the alignment layer 12, , An end portion on the side of the second end region 13b of the adhesive layer 30 may be formed at a boundary portion between the fourth end region 12b and the fourth adjacent region 12c _b of the alignment layer 12. When both ends of the adhesive layer 30 are on the first boundary lines 13p, 113p and the second boundary lines 13q, 113q, respectively, by peeling the substrate layer from the optical layered body provided with the substrate layer, FIG. As shown in (A), the positions of both ends of the adhesive layer 30 are the first retardation layer 13", which forms the retardation layer-containing layer 130", the adhesive layer 15 for retardation layer, and the second retardation layer. An optical laminate 184 having the same position as the both ends of (113") can be obtained. The first retardation layer 13" and the second retardation layer 113" included in the optical laminate 184 include a first end difference region of a first retardation layer and a second retardation layer of an optical laminate having a base layer. And a region derived from the second end region, that is, a first end present in the first retardation layer 13' and the second retardation layer 113' of the optical laminate 181 shown in FIG. 8C. The regions 13'a and 113'a and the second end regions 13'b and 113'b may be excluded. In this case, the position of both ends in the width direction W of the optical film 20 may be outside the position of both ends in the width direction W of the adhesive layer 30, or one side in the width direction W The end portion may be outside the position of one end portion in the width direction W of the adhesive layer 30.

(Modified example 7 of the second embodiment)

In the optical layered body 181 shown in Fig. 8C described above, the first end regions 13'a and 113'a are provided in the first retardation layer 13' and the second retardation layer 113'. And the case where the second end regions 13'b and 113'b are included as an example, the optical laminate may not include one or both of these end regions. When both ends of the first retardation layer and the second retardation layer of the optical laminate do not have end regions, the region including one end of the first retardation layer and the second retardation layer of the optical laminate is the first of the retardation film. The region originates from the adjacent region, and the region including the other end is the region derived from the second adjacent region of the retardation film.

(Modified example 8 of the second embodiment)

The optical layered body 181 shown in FIG. 8(C) described above includes the optical film 20, the adhesive layer 30, the second retardation layer 113', the retardation adhesive layer 15', and the first retardation Although the case where the layer 13' is laminated|stacked in this order was demonstrated as an example, it is not limited to this. For example, as shown in FIG. 11B, the optical laminate 185 further having an alignment layer 112 ′ between the adhesive layer 30 and the second retardation layer 113 ′ may be used. As shown in C), the optical layered body 186 having an alignment layer 12' on the surface opposite to the adhesive layer 15' for the retardation layer of the first retardation layer 13' may be a combination of these. It can be free (Figure 12).

In this case, in the width direction W, the positions of both ends of the alignment layer are also the same as the positions of both ends of the adhesive layer 30. The optical layered body 185 shown in Fig. 11B can be produced using, for example, the retardation film shown in Fig. 10. In this case, the alignment layer 112' is a layer derived from the alignment layer 112 shown in FIG. The optical layered body 186 shown in Fig. 11C is, for example, peeled off the base layer 11 as a peeling layer from the optical layered body 151 with the base layer shown in Fig. 8B. Can be obtained. In this case, the alignment layer 12' is a layer derived from the alignment layer 12 shown in Fig. 8B. The optical laminated body 187 shown in FIG. 12 can be manufactured using the retardation film shown in FIG. 10. In this case, the alignment layers 12' and 112' are layers derived from the alignment layers 12 and 112 shown in FIG. Also in this case, the position of at least one end in the width direction W of the optical film 20 may be outside the position of at least one end in the width direction W of the adhesive layer 30.

In addition, all of the optical laminates 185 to 187 ((B) and (C) in FIG. 11 and FIG. 12) have ends of the adhesive layer 30 on the first boundary lines 13p and 113p or in the first adjacent region. It may be on (13c _a , 113c _a ), on the second boundary lines (13q, 113q) or on the second adjacent areas (13c _b , 113c _b ), or in a combination of these. In this case, the end portion on the side of the first end region 13a of the adhesive layer 30 can be formed at the boundary between the third end region and the third adjacent region of the alignment layers 12' and 112', and the adhesive layer ( The end portion on the side of the second end region 13b of 30) can be formed at the boundary between the fourth end region and the fourth adjacent region of the alignment layers 12' and 112'. For example, one end of the adhesive layer 30 is on the first boundary lines 13p, 113p or on the first adjacent areas 13c _a , 113c _a , and the other end is above the second boundary lines 13q, 113q or second. When over the adjacent regions 13c _b and 113c _b , as shown in FIGS. 13A to 13C, the positions of both ends of the adhesive layer 30 are aligned with the alignment layer 12" and the first retardation layer ( 13"), adhesive layers for retardation layer 15", second retardation layer 113", and optical laminates 188 to 190, which are the same as the positions of both ends of alignment layer 112", can be obtained. These optical laminates The first retardation layer 13" and the second retardation layer 113" included in (188 to 190) are the first end region and the first end region of the second retardation layer and the second retardation layer of the optical layered body provided with the base layer. The region originating from the two-end region, that is, the optical laminates 185 to 187 may be made not to include the regions indicated by the diagonal lines shown in Figs. 11B and 11C and Fig. 12. , In the optical film 20, the position of at least one end in the width direction W may be outside the position of at least one end in the width direction W of the adhesive layer 30.

(Modified Example 9 of the second embodiment)

In the optical layered body 181 shown in Fig. 8C described above, two retardation layers (first retardation layer 13' and second retardation layer 113' included in the retardation layer-containing layer 130') )) All of these cases have been described as an example in which a phase difference characteristic has a different region, but is not limited to this. For example, the retardation characteristics of the two retardation layers may be the same throughout, or one retardation layer may have a region in which the retardation characteristics are different, and the other retardation layer may have the same retardation characteristics throughout.

(Modified example 10 of the second embodiment)

In the optical layered body 181 shown in Fig. 8C described above, the case where the phase difference layer-containing layer has two phase difference layers was described as an example, but three or more phase difference layers may be included. When the phase difference layer-containing layer includes three or more phase difference layers, three or more phase difference layers may be stacked by forming an adhesive layer for the phase difference layers between the phase difference layers. In this case, the retardation characteristics of all the retardation layers containing the retardation layer-containing layer may be the same throughout, or all retardation layers may have regions with different retardation characteristics, and at least one retardation layer has regions with different retardation characteristics. May be.

The embodiments of the present invention and modifications thereof have been described above, but the present invention is not limited to these embodiments and modifications thereof, and may be implemented by, for example, combining the structures and steps of each of the above embodiments and modifications. It might be.

(Base layer)

The base layer has a function as a support layer supporting the alignment layer and retardation layer formed thereon. It is preferable that the base layer is a film formed of a resin material. As the resin material, for example, a resin material excellent in transparency, mechanical strength, thermal stability and stretchability is used.

Specifically, polyolefin resins, such as polyethylene and polypropylene; Cyclic polyolefin-based resins such as norbornene-based polymers; Polyester resins such as polyethylene terephthalate and polyethylene naphthalate; (Meth)acrylic acid-based resins such as (meth)acrylic acid and methyl poly(meth)acrylate; Cellulose ester-based resins such as triacetyl cellulose, diacetyl cellulose, and cellulose acetate propionate; Vinyl alcohol resins such as polyvinyl alcohol and polyvinyl acetate; Polycarbonate-based resins; Polystyrene-based resins; Polyarylate resins; Polysulfone-based resins; Polyethersulfone-based resins; Polyamide resins; Polyimide resins; Polyether ketone-based resins; Polyphenylene sulfide resins; And polyphenylene oxide-based resins, mixtures thereof, and copolymers. Among these resins, it is preferable to use any of cyclic polyolefin-based resins, polyester-based resins, cellulose ester-based resins and (meth)acrylic acid-based resins or mixtures thereof. Moreover, said "(meth)acrylic acid" means "at least 1 type of acrylic acid and methacrylic acid."

The base layer may be a single layer in which one kind or two or more kinds of resins are mixed, or may have a multilayer structure of two or more layers. In the case of having a multilayer structure, the resins forming each layer may be the same or different from each other.

Any additive may be added to the resin material constituting the film formed of the resin material. Examples of the additives include ultraviolet absorbers, antioxidants, lubricants, plasticizers, mold release agents, coloring inhibitors, flame retardants, nucleating agents, antistatic agents, pigments and coloring agents.

The thickness of the base layer is not particularly limited, but is generally 1 to 500 µm, more preferably 1 to 300 µm, and further preferably 5 to 200 µm from the viewpoint of workability such as strength and handling. desirable.

In order to improve the adhesion between the base layer and the alignment layer, at least the surface on which the alignment layer of the base layer is formed may be subjected to corona treatment, plasma treatment, flame treatment, or the like, or a primer layer or the like. Further, the adhesion may be adjusted by adjusting the components of the composition for forming an alignment layer used to form an alignment layer or the components of a composition for forming a phase difference layer used to form a retardation layer.

(Orientation layer)

The alignment layer is as described in the above [Method for producing phase difference film]. The thickness of the alignment layer is usually 10 to 500 nm, and preferably 10 to 200 nm.

(Phase difference layer)

The phase difference layer is not particularly limited as long as it provides a predetermined phase difference to light, and functions as, for example, a half wave plate, a quarter wave plate, a positive C plate, and a quarter wave plate with reverse wavelength dispersion. Can be lifted. The retardation layer can be formed using a known liquid crystal compound. The type of the liquid crystal compound is not particularly limited, and a rod-shaped liquid crystal compound, a disc-shaped liquid crystal compound, and a mixture thereof can be used. Further, the liquid crystal compound may be a polymer liquid crystal compound, a polymerizable liquid crystal compound, or a mixture of these.

(Optical film)

Examples of the optical film include a polarizing film, a reflective film, a semi-transmissive reflective film, a brightness enhancing film, an optical compensation film, and a film having an anti-glare function. Moreover, it may have the same structure as the above-mentioned retardation film. The optical film may have a single layer structure, or a multilayer optical film having a multilayer structure of two or more layers.

(Adhesive layer)

The adhesive layer may be formed of an adhesive, an adhesive, or a combination of these, and is usually one layer, but may be two or more layers. When the adhesive layer is composed of two or more layers, each layer may be formed of the same material as each other, or may be formed of different materials.

As the adhesive, for example, one or two or more of an aqueous adhesive, an active energy ray-curable adhesive, an adhesive, or the like can be formed in combination. Examples of the water-based adhesive include polyvinyl alcohol-based resin aqueous solutions, water-based two-component urethane emulsion adhesives, and the like. The active energy ray-curable adhesive is an adhesive that cures by irradiating active energy rays such as ultraviolet rays, and includes, for example, a polymerizable compound and a photopolymerizable initiator, a photoreactive resin, a binder resin, and a photoreactive crosslinking agent. And the like. Examples of the polymerizable compound include photopolymerizable monomers such as photocurable epoxy monomers, photocurable acrylic monomers, and photocurable urethane monomers, and oligomers derived from these monomers. Examples of the photopolymerization initiator include substances that generate active species such as neutral radicals, anionic radicals, and cationic radicals by irradiating active energy rays such as ultraviolet rays.

Examples of the pressure-sensitive adhesive include a composition in which a (meth)acrylic resin, a styrene resin, a silicone resin, or the like is used as a base polymer and a crosslinking agent such as an isocyanate compound, an epoxy compound or an aziridine compound is added.

The adhesive layer is preferably formed using an active energy ray-curable adhesive, and is particularly preferably formed using an adhesive containing an ultraviolet curable epoxy-based monomer and a photocationic polymerization initiator.

(Adhesive layer for phase difference layer)

The adhesive layer for retardation layers can be formed by an adhesive, an adhesive, or a combination of these. The adhesive layer for the retardation layer is usually one layer, but may be formed of two or more layers. When the adhesive layer for retardation layers consists of two or more layers, each layer may be formed of the same material as each other, or may be formed of different materials.

Examples of the adhesive and the adhesive forming the adhesive layer for the retardation layer include the same adhesives and adhesives used in the adhesive layer. It is preferable to use an adhesive as an adhesive layer for a retardation layer.

1, 10: retardation film, 11: base layer, 12, 12": alignment layer, 12a, 12'a: third end region, 12b, 12'b: fourth end region, 12c _a : first adjacent region, 12c _b : second adjacent region, 13, 13', 13": retardation layer (first retardation layer), 13a, 13'a: first end region, 13b, 13'b: second end region, 13c _a : 1st adjacent area, 13c _b : 2nd adjacent area, 13p: 1st boundary line, 13q: 2nd boundary line, 15, 15', 15": adhesive layer for retardation layer, 20: optical film, 30: adhesive layer, 51, 52, 53, 54: optical laminate with base layer, 81, 82, 83, 84: optical laminate, 100: retardation film, 101: base layer, 102, 112, 112': alignment layer, 103, 113, 113', 113": second retardation layer (phase difference layer), 113a, 113'a: first end region, 113b, 113'b: second end region, 113c _a : first adjacent region, 113c _b : second adjacent region, 113p: first boundary line, 113q: second boundary line: 130, 130', 130": retardation layer-containing layer, 151: optical layered body with base layer, 181, 184, 185, 186, 187, 188, 189, 190: optical Laminate.

Claims (31)

A retardation film comprising a base layer, an alignment layer, and a retardation layer-containing layer comprising at least one retardation layer in this order,
The retardation layer has a first end region including one end in the width direction, and a first adjacent region adjacent to the first end region in the width direction,
The first adjacent region has a first slow axis,
The first end region is a retardation film having a second slow axis that is a slow axis in a direction different from the first slow axis. The phase difference film according to claim 1, wherein the first slow axis or the second slow axis is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer. The retardation film according to claim 1 or 2, wherein the alignment layer comprises a photo-alignment polymer. The retardation layer according to any one of claims 1 to 3, further comprising: a second end region including the other end in the width direction and a second end region adjacent to the second end region in the width direction. 2 has adjacent areas,
The second adjacent region has a third slow axis,
The second end region has a retardation film having a fourth slow axis that is a slow axis in a direction different from the third slow axis. The retardation film according to claim 4, wherein the third slow axis or the fourth slow axis is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction that is a direction orthogonal to the width direction in a plane of the retardation layer. A retardation film comprising a base layer, an alignment layer, and a retardation layer-containing layer comprising at least one retardation layer in this order,
The retardation layer is on the alignment layer,
The alignment layer has a third end region including one end in the width direction, and a third adjacent region adjacent to the third end region in the width direction,
The third adjacent region has a first alignment axis,
The third end region is a retardation film having a second alignment axis which is an alignment axis in a direction different from the first alignment axis. The alignment layer of claim 6, wherein the alignment layer has a fourth end region including the other end in the width direction, and a fourth adjacent region adjacent to the fourth end region in the width direction,
The fourth adjacent region has a third alignment axis,
The fourth end region is a retardation film having a fourth alignment axis which is an alignment axis in a direction different from the first alignment axis. An optical layered body comprising a retardation film according to any one of claims 1 to 7, and a base layer comprising an optical film,
The optical film is an optical laminate with a base layer, which is laminated on the retardation layer-containing layer of the retardation film through an adhesive layer. An optical layered body comprising a retardation film according to any one of claims 1 to 5 and a base layer comprising an optical film,
The optical film is laminated on the retardation layer-containing layer of the retardation film through an adhesive layer,
The second slow axis of the first end region is a slow axis in a direction forming an angle of 20° or less with the orthogonal direction,
One end of the adhesive layer in the width direction is on the first end region of the retardation layer, or on a first boundary line that is a boundary between the first end region and the first adjacent region, the optical with base layer Laminate. An optical layered body comprising a retardation film according to any one of claims 1 to 5 and a base layer comprising an optical film,
The optical film is laminated on the retardation layer-containing layer of the retardation film through an adhesive layer,
The first slow axis of the first adjacent region is a slow axis in a direction forming an angle of 20° or less with the orthogonal direction,
One end of the adhesive layer in the width direction is on the first adjacent area of the retardation layer, or on a first boundary line that is a boundary between the first end area and the first adjacent area. Laminate. The retardation film according to claim 9 or 10, wherein the retardation film is the retardation film according to claim 4 or 5,
The fourth slow axis of the second end region is a slow axis in a direction forming an angle of 20° or less with the orthogonal direction,
The other end of the adhesive layer in the width direction has a base layer over the second end region of the retardation layer, or over a second boundary line that borders the second end region and the second adjacent region. Optical laminate. The retardation film according to claim 9 or 10, wherein the retardation film is the retardation film according to claim 4 or 5,
The third slow axis of the second adjacent region is a slow axis in a direction forming an angle of 20° or less with the orthogonal direction,
The other end of the adhesive layer in the width direction has a base layer on the second adjacent region of the phase difference layer, or on a second boundary line that is a boundary between the second end region and the second adjacent region. Optical laminate. An optical laminate comprising an optical film and a retardation layer-containing layer comprising at least one retardation layer laminated through an adhesive layer,
The phase difference layer includes a liquid crystal compound,
The retardation layer has an optical laminate in which the position of one end in the width direction is the same as the position of one end in the width direction of the adhesive layer. The optical laminate according to claim 13, wherein the retardation layer has a position at the other end in the width direction that is the same as a position at the other end in the width direction of the adhesive layer. 15. The method of claim 13 or claim 14, The retardation layer-containing layer further has an alignment layer on the retardation layer,
In the width direction, the position of one end of the alignment layer is the same as the position of one end of the adhesive layer. 16. The optical laminate according to claim 15, wherein in the width direction, the position of the other end of the alignment layer is the same as the position of the other end of the adhesive layer. 17. The optical laminate according to claim 15 or 16, wherein the alignment layer comprises a photo-alignment polymer. The retardation layer according to any one of claims 13 to 17, wherein the retardation layer comprises: a first' end region including one end in the width direction and a first' end region adjacent to the first' end region in the width direction. 1 has an adjacent area,
The first adjacent region has a first slow axis,
The first' end region has a second slow axis, which is a slow axis in a direction different from the first slow axis. The optical laminate according to claim 18, wherein the second slow axis is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction that is a direction orthogonal to the width direction in a plane of the retardation layer. 20. The retardation layer according to claim 18 or 19, wherein the retardation layer further comprises: a second' end region including the other end in the width direction, and a second adjacent the second' end region in the width direction. Has an adjacent area,
The second adjacent region has a third slow axis,
The second' end region has a fourth slow axis that is a slow axis in a direction different from the third slow axis. The optical laminate according to claim 20, wherein the fourth slow axis is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer. 18. The method of any one of claims 15 to 17, wherein the retardation layer is over the alignment layer,
The alignment layer has a third' end region including one end in the width direction, and a third adjacent region adjacent to the third' end region in the width direction,
The third adjacent region has a first alignment axis,
The 3'end region has an optical laminate having a second alignment axis which is an alignment axis in a direction different from the first alignment axis. The alignment layer of claim 22, wherein the alignment layer has a fourth' end region including the other end in the width direction, and a fourth adjacent region adjacent to the fourth' end region in the width direction,
The fourth adjacent region has a third alignment axis,
The 4'end region has an optical laminate having a fourth alignment axis which is an alignment axis in a direction different from the third alignment axis. A method for producing the retardation film according to any one of claims 1 to 7,
An alignment layer forming process of forming the alignment layer on the base layer,
A method of manufacturing a retardation film having a retardation layer forming step of forming the retardation layer-containing layer on the alignment layer. 25. The method of claim 24, The alignment layer comprises a photo-alignment polymer,
The alignment layer forming step is a method of manufacturing a retardation film having a step of irradiating polarized ultraviolet light to the photo-alignment polymer. A process for preparing the retardation film according to any one of claims 1 to 7, and
The process of preparing the optical film,
A method of manufacturing an optical laminate with a substrate layer, having a lamination step of laminating the optical film on the retardation layer-containing layer of the retardation film through an adhesive layer. A process for preparing the retardation film according to any one of claims 1 to 5,
The process of preparing the optical film,
It has a lamination process of laminating the optical film on the retardation layer-containing layer of the retardation film through an adhesive layer,
The second slow axis of the first end region is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer,
The adhesive layer formed in the lamination process has one end in the width direction over the first end region of the retardation layer, or on a first boundary line that is a boundary between the first end region and the first adjacent region. The manufacturing method of the optical laminated body with a base material layer. A process for preparing the retardation film according to any one of claims 1 to 5,
The process of preparing the optical film,
It has a lamination process of laminating the optical film on the retardation layer-containing layer of the retardation film through an adhesive layer,
The first slow axis in the first adjacent region is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction, which is a direction orthogonal to the width direction in the plane of the retardation layer,
The adhesive layer formed in the lamination process has one end in the width direction over the first adjacent region of the retardation layer, or on a first boundary line that is a boundary between the first end region and the first adjacent region. The manufacturing method of the optical laminated body with a base material layer. The retardation film according to claim 27 or 28, wherein the retardation film is the retardation film according to claim 4 or 5,
The fourth slow axis of the second end region is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction which is a direction orthogonal to the width direction in the plane of the retardation layer,
The other end of the adhesive layer in the width direction has a base layer over the second end region of the retardation layer, or over a second boundary line that borders the second end region and the second adjacent region. Method of manufacturing an optical laminate. The retardation film according to claim 27 or 28, wherein the retardation film is the retardation film according to claim 4 or 5,
The third slow axis in the second adjacent region is a slow axis in a direction that forms an angle of 20° or less with an orthogonal direction that is a direction orthogonal to the width direction in the plane of the retardation layer,
The other end of the adhesive layer in the width direction has a base layer on the second adjacent region of the phase difference layer, or on a second boundary line that is a boundary between the second end region and the second adjacent region. Method of manufacturing an optical laminate. The process of preparing the optical laminated body with a base material layer as described in any one of Claims 9-12,
An optical lamination having a peeling step of peeling a release layer comprising the substrate layer included in the optical layered body with the substrate layer in a direction parallel to an orthogonal direction which is a direction orthogonal to the width direction in the plane of the phase difference layer. Method of making a sieve.

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