JP2019204121A - Retardation film and optical laminate - Google Patents

Abstract

To provide a retardation film appropriate for producing an optical laminate having a retardation layer including a liquid crystal compound, an optical laminate having a substrate layer, an optical laminate, and a manufacturing method of these.SOLUTION: A retardation film 1 includes a substrate layer 11, an alignment layer 12 and a retardation layer-containing layer that contains at least one retardation layer 13, in this order. The retardation layer 13 includes: a first end area 13a including one end in a width direction; and a first neighboring area 13cneighboring the first end area 13a in the width direction. The first neighboring area 13cincludes a first slow axis. The first end area 13a includes a second slow axis being a slow axis in a different direction from the first slow axis.SELECTED DRAWING: Figure 1

Description

  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 including an optically anisotropic film such as a polarizing film or a retardation film is used. As such an optically anisotropic film, a film in which a liquid crystal compound layer is formed on a substrate film subjected to an alignment treatment is known. For example, Patent Document 1 describes an elliptically polarizing plate including a patterned polarizing layer containing a liquid crystal compound and a patterned retardation layer containing a liquid crystal compound. Patent Document 2 describes that a liquid crystal material is used for a retardation layer of an optical film used for a circularly polarizing plate or the like.

JP 2009-193014 A Japanese Patent Laid-Open 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 material layer, an optical laminate, and a production method thereof. And

  The present invention provides a retardation film, an optical layered body with a base material layer, an optical layered body, and a method for producing them as shown below.

[1] A retardation film including a base layer, an alignment layer, and a retardation layer-containing layer including at least one retardation layer in this order,
The retardation layer has a first end region including one end portion 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 phase difference film, wherein the first end region has a second slow axis that is a slow axis in a direction different from the first slow axis.

  [2] 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. The retardation film according to [1].

  [3] The retardation film according to [1] or [2], wherein the alignment layer includes a photoalignable polymer.

[4] The retardation layer further includes a second end region including the other end portion 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 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 the plane of the retardation layer. The retardation film as described in [4].

[6] A retardation film including a base layer, an alignment layer, and a retardation layer-containing layer including 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 portion 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 orientation axis;
The phase difference film, wherein the third end region has a second alignment axis that is an alignment axis in a direction different from the first alignment axis.

[7] The alignment layer includes a fourth end region including the other end portion 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 orientation axis;
The retardation film according to [6], wherein the fourth end region has a fourth orientation axis that is an orientation axis in a direction different from the first orientation axis.

[8] An optical laminate with a base material layer comprising the retardation film according to any one of [1] to [7] and an optical film,
The said optical film is an optical laminated body with a base material layer currently laminated | stacked on the said retardation layer content layer of the said retardation film through the contact bonding layer.

[9] An optical laminate with a base material layer comprising the retardation film according to any one of [1] to [5] and an optical film,
The optical film is laminated on the retardation layer-containing layer of the retardation film via 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 the orthogonal direction;
One end portion of the adhesive layer in the width direction is on the first end region of the retardation layer or on a first boundary line serving as a boundary between the first end region and the first adjacent region. An optical laminate with a base material layer.

[10] An optical laminate with a base material layer comprising the retardation film according to any one of [1] to [5] and an optical film,
The optical film is laminated on the retardation layer-containing layer of the retardation film via an adhesive layer,
The first slow axis of the first adjacent region is a slow axis in a direction that forms an angle of 20 ° or less with the orthogonal direction;
One end portion of the adhesive layer in the width direction is on the first adjacent region of the retardation layer or on a first boundary line serving as a boundary between the first end region and the first adjacent region. An optical laminate with a base material layer.

[11] The retardation film is the retardation film according to [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 the orthogonal direction;
The other end of the adhesive layer in the width direction is on the second end region of the retardation layer or on a second boundary line serving as a boundary between the second end region and the second adjacent region. [9] An optical laminate with a base material layer according to [10].

[12] The retardation film is the retardation film according to [4] or [5],
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 portion of the adhesive layer in the width direction is on the second adjacent region of the retardation layer or on a second boundary line serving as a boundary between the second end region and the second adjacent region. [9] An optical laminate with a base material layer according to [10].

[13] An optical laminate in which an optical film and a retardation layer-containing layer including at least one retardation layer are laminated via an adhesive layer,
The retardation layer includes a liquid crystal compound,
The retardation layer is 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 layered body according to [13], wherein the retardation layer has the same position of the other end in the width direction as the position of the other end in the width direction of the adhesive layer.

[15] Furthermore, the retardation layer-containing layer has an alignment layer on the retardation layer,
In the width direction, the position of one end portion of the alignment layer is the same as the position of one end portion of the adhesive layer, [13] or [14].

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

  [17] The optical layered body according to [15] or [16], wherein the alignment layer includes a photoalignable polymer.

[18] The retardation layer includes 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 laminated body 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 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. The optical laminated body as described.

[20] The retardation layer further includes 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 laminated body 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 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 the plane of the retardation layer. The optical laminated body as described.

[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 orientation axis;
The optical laminate according to any one of [15] to [17], wherein the third ′ end region has a second alignment axis that is an alignment axis in a direction different from the first alignment axis.

[23] The alignment layer includes 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 orientation axis;
The optical layered body according to [22], wherein the fourth ′ end region has a fourth alignment axis that is an alignment axis in a direction different from the third alignment axis.

[24] A method for producing a retardation film according to any one of [1] to [7],
An alignment layer forming step of forming the alignment layer on the base material layer;
A retardation layer forming step of forming the retardation layer-containing layer on the alignment layer.

[25] The alignment layer includes a photoalignable polymer,
The method for producing a retardation film according to [24], wherein the alignment layer forming step includes a step of irradiating the photoalignable polymer with polarized ultraviolet rays.

[26] A step of preparing the retardation film according to any one of [1] to [7];
A step of preparing an optical film;
A lamination step of laminating the optical film on the retardation layer-containing layer of the retardation film via an adhesive layer.

[27] A step of preparing the retardation film according to any one of [1] to [5];
A step of preparing an optical film;
Laminating the optical film on the retardation layer-containing layer of the retardation film via an adhesive layer, and
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 that is a direction orthogonal to the width direction in the plane of the retardation layer,
In the adhesive layer provided in the laminating step, one end in the width direction is on the first end region of the retardation layer or 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 which exists on the 1st boundary line used.

[28] A step of preparing the retardation film according to any one of [1] to [5];
A step of preparing an optical film;
Laminating the optical film on the retardation layer-containing layer of the retardation film via an adhesive layer, and
The first slow axis of the first 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,
In the adhesive layer provided in the laminating step, one end in the width direction is on the first adjacent region of the retardation layer or 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 which exists on the 1st boundary line used.

[29] The retardation film is the retardation film according to [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 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 is on the second end region of the retardation layer or on a second boundary line serving as a boundary between the second end region and the second adjacent region. [27] or [28] The manufacturing method of the optical laminated body with a base material layer.

[30] The retardation film is the retardation film according to [4] or [5],
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 an orthogonal direction that is a direction orthogonal to the width direction in the plane of the retardation layer,
The other end portion of the adhesive layer in the width direction is on the second adjacent region of the retardation layer or on a second boundary line serving as a boundary between the second end region and the second adjacent region. [27] or [28] The manufacturing method of the optical laminated body with a base material layer.

[31] A step of preparing the optical layered body with a base material layer according to any one of [9] to [12];
Peeling for peeling the peeling layer including the base material layer included in the optical layered body with the base material layer in a direction parallel to the orthogonal direction which is a direction perpendicular to the width direction in the plane of the retardation layer A process for producing an optical layered body.

  According to the present invention, there are provided a retardation film suitable for producing an optical laminate having a retardation layer containing a liquid crystal compound, an optical laminate with a base material layer, an optical laminate, and methods for producing these. Can do.

(A) is a top view which shows typically an example of the phase difference film of this invention, (B) is XX sectional drawing of FIG. 1 (A). It is a schematic sectional drawing which shows typically an example of the optical laminated body with a base material layer of this 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. It is a schematic sectional drawing which shows typically an example of the optical laminated body of this 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. It is a schematic sectional drawing which shows typically an example of the optical laminated body of this invention. (A) is a schematic sectional drawing which shows typically an example of the optical laminated body with a base material layer of this invention, (B) and (C) are the manufacturing processes of the optical laminated body with a base material layer of this invention. It is a schematic sectional drawing which shows typically an example. (A) is a schematic sectional drawing which shows typically an example of the retardation film of this invention, (B) is a schematic sectional drawing which shows typically an example of the optical laminated body with a base material layer of this invention. And (C) is a schematic cross-sectional view schematically showing a state in which the release layer is peeled off from the optical layered body with a base material layer shown in (B). (A) And (B) is a schematic sectional drawing which shows typically an example of the manufacturing process of the retardation film of this invention. It is a schematic sectional drawing which shows typically an example of the phase difference film of this invention. (A)-(C) are schematic which shows typically an example of the optical laminated body of this invention. It is the schematic which shows an example of the optical laminated body of this invention typically. (A)-(C) are schematic which shows typically an example of the optical laminated body of this invention.

<Outline of the present invention>
The retardation film of the present invention is a retardation film including a base layer, an alignment layer, and a retardation layer-containing layer including at least one retardation layer in this order,
The retardation layer has a first end region including one end portion 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 including a base layer, an alignment layer, and a retardation layer-containing layer including 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 portion 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 orientation axis;
The third end region may have a second alignment axis that is an alignment axis in a direction different from the first alignment axis.

  Moreover, the optical layered body with a base material layer of the present invention is an optical layered body with a base material layer including the retardation film and the optical film, and the optical film is formed of a retardation film through an adhesive layer. Laminated on the retardation layer-containing layer.

  Furthermore, the optical laminate of the present invention is an optical laminate in which an optical film and a retardation layer-containing layer including at least one retardation layer are laminated via an adhesive layer, and the retardation layer Includes a liquid crystal compound, and the retardation layer has the same position of one end in the width direction 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. When two or more retardation layers are included, it is sufficient that at least one retardation layer has the above retardation characteristics, and the other retardation layers do not have the above retardation characteristics. May be. When two or more retardation layers are included, it is preferable that all the retardation layers have the above-described retardation characteristics. Further, when the retardation layer-containing layer includes two or more retardation layers, for example, two or more retardation layers can be laminated with each other via a retardation layer adhesive layer. The containing layer can contain a retardation layer adhesive layer in addition to the retardation layer. The retardation layer-containing layer including two or more retardation layers may be obtained by laminating two or more retardation layers without interposing a retardation layer adhesive layer. Furthermore, the retardation layer-containing layer may include another alignment layer that is distinguished from the alignment layer included in the retardation film.

  The retardation film can be used as an optical laminate with a base layer by laminating an optical film as described above, and the optical laminate with a base layer includes a base layer as described later. The release layer (base material layer, or base material layer and orientation layer) may be used after being peeled off. In this case, the end of the adhesive layer for laminating the retardation layer-containing layer and the optical film is the end of the retardation layer-containing layer so that the release layer can be peeled from the optical layered body with the base material layer. (It is preferable to provide so that it may not protrude from the edge part of the layer located in the outermost side of the width direction among the layers which comprise a phase difference layer content layer.). Moreover, since the edge part of the phase difference layer in which the adhesive layer is not provided becomes a part to be removed in the final product, the edge part of the adhesive layer is located as close as possible to the edge part of the phase difference layer-containing layer. It is preferable.

  According to the retardation film, the first end region and the first adjacent region of the retardation layer have different retardation characteristics from each other. Moreover, according to said retardation film, since the 3rd end area | region and 3rd adjacent area | region of an orientation layer have mutually different orientation axes, the phase difference characteristic of the retardation layer formed on an orientation layer is shown. Can be different. Therefore, the range of the first end region and the third end region can be easily recognized by observing the light transmittance of the retardation layer using a mirror and a polarizing plate. Thereby, since it becomes easy to grasp | ascertain the position which provides an contact bonding layer, it becomes easy to manufacture the optical laminated body with a base material layer which can peel a peeling layer. In addition, since the range of the first end region and the third end region can be easily recognized, the end portion of the adhesive layer is provided near the end portion of the retardation layer included in the retardation layer-containing layer. it can. Thereby, it becomes easy to reduce the range of the edge part part of the phase difference layer removed in the final product.

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

  Thereby, although mentioned later for details, the position of one edge part in the width direction of a phase contrast layer is the width direction of an adhesion layer by peeling the peeling layer containing a base material layer from an optical film with a base material layer. It is possible to easily obtain the optical layered body described above, which is the same as the position of one end of the above.

<Embodiment of the present invention>
[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Phase difference film]
FIG. 1A is a plan view schematically showing an example of the retardation film of the present embodiment, and FIG. 1B is a sectional view taken along line XX in FIG. In the figure, W represents the width direction, and L represents an orthogonal direction orthogonal to the width direction W in plan view. The retardation film 1 includes a base material layer 11, an alignment layer 12, and one retardation layer 13 (retardation layer-containing layer) in this order. For example, as shown in FIGS. 1A and 1B, the retardation film 1 has a width-direction length that decreases in the order of the base material layer 11, the alignment layer 12, and the retardation layer 13 in the width-direction cross section. The positions in the width direction at both ends of the alignment layer 12 are inside the positions in the width direction at both ends of the base material layer, and the positions in the width direction at both ends of the retardation layer 13 are at the both ends of the alignment layer 12. It is inside the position in the width direction.

  The retardation film 1 is not limited to those in which the length in the width direction of each layer and the positions in the width direction of both ends of each layer have the above-described relationship. For example, the base layer 11 and the alignment layer 12 may have the same length in the width direction, and the positions in the width direction at both ends may be the same in the width direction cross section of the retardation film 1. In addition, the alignment layer 12 and the retardation layer 13 may have the same width in the width direction, and the width direction positions of both ends may be the same in the width direction cross section of the retardation film 1. 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 positions in the width direction at both ends of the alignment layer 12 are more than the positions in the width direction at both ends of the retardation layer 13. It may be inside. Furthermore, the base layer 11 and the retardation layer 13 may have the same length in the width direction, and the width direction positions of both ends may be the same in the width direction cross section of the retardation film 1.

  The base material layer 11 has a function as a support layer that supports the alignment layer 12 and the retardation layer 13 formed thereon.

The alignment layer 12 has an alignment regulating force for aligning the liquid crystal compound contained in the retardation layer 13 formed thereon in the desired direction, and can be formed using, for example, a photoalignable 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, at both ends in the width direction W, a first end region 13a and a second end region 13b having a slow axis in a direction different from the slow axis of the adjacent region. Therefore, each region of the alignment layer 12 can also have an alignment axis that can exhibit a different alignment regulating force in correspondence with each region of the retardation layer 13 provided on the alignment layer 12. In the alignment layer 12, the third end region 12a and the fourth end region 12b at both ends in the width direction W of the alignment layer 12 are respectively positioned as shown by the right-down oblique lines in FIG. 1 (A) and FIG. 1 (B). The phase difference layer 13 has an alignment axis capable of exerting an alignment regulating force capable of providing the phase difference characteristics of the first end region 13a and the second end region 13b. The third adjacent regions 12c _a and fourth adjacent region 12c _b adjacent to the third end region 12a and the fourth end region 12b of the alignment layer 12, first adjacent region 13c of each retardation layer 13 _a and the second having an orientation axis capable of exhibiting alignment regulating force can be imparted to the phase difference characteristic of the adjacent regions 13c _b.

As shown in FIGS. 1A and 1B, the retardation layer 13 includes a first end region 13 a including one end portion in the width direction W, and a first end region 13 a adjacent to the first end region 13 a in the width direction W. A first adjacent region 13c _a , _a second end region 13b including the other end in the width direction W, and a second adjacent region 13c _b adjacent to the second end region 13b in the width direction W; In FIGS. 1A and 1B, the first end region 13a and the second end region 13b are indicated by diagonal lines rising to the right. In the phase difference film 1, a first boundary line 13p constituting a first end region 13a of the boundary between the first adjacent region 13c _a is linear, a second end region 13b a boundary between the second adjacent region 13c _b The formed second boundary line 13q is also linear. The first boundary line 13p and the second boundary line 13q are parallel to the orthogonal direction L.

The first adjacent region 13c _a is not particularly limited as long as it is a region adjacent to the first end region 13a, and the second adjacent region 13c _b is not particularly limited as long as it is a region adjacent to the second end region 13b. . For example, as shown in FIG. 1 (A) and (B), it may be an area which is the slow axis direction are the same as the first adjacent region 13c _a second adjacent region 13c _b. 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, and the second adjacent region 13c _b is The side adjacent to the second end region 13b is adjacent to the first end region 13a on the side opposite to the width direction W. Further, a first adjacent region 13c _a and the second adjacent region 13c _b is an area where slow axis directions are different from each other, may be in contact with each other, a first adjacent region 13c _a second adjacent region 13c _b There may be another region in the direction of the slow axis.

The first adjacent region 13ca 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 having 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 second slow axis and the fourth slow axis are slow axes in a direction that forms an angle of 20 ° or less with the orthogonal direction L that is a direction orthogonal to the width direction W in the plane of the retardation layer 13. is there. The angle formed between the second slow axis or the fourth slow axis and the orthogonal direction L is the angle formed between the second slow axis and the orthogonal direction L, or the angle formed between the fourth slow axis and the orthogonal direction L. Of these, an acute angle is assumed. The angle formed by the second slow axis or the fourth slow axis and the orthogonal direction is 0 ° means that the second slow axis or the fourth slow axis and the orthogonal direction L are parallel. means.

  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 that forms an angle of 20 ° or less with the first boundary line 13p, and the fourth slow axis is the second slow axis. It may also be a slow axis in a direction that forms an angle of 20 ° or less with the boundary line 13q. The angle formed between the second slow axis and the first boundary line 13p can be regarded as an angle formed when the second slow axis and the first boundary line 13p are extended to contact each other. However, the angle when not contacting (when the second slow axis and the first boundary line 13p are parallel) is 0 °. Further, the angle formed between the fourth slow axis and the second boundary line 13q can be regarded as an angle formed when the fourth slow axis and the second boundary line 13q are extended to contact each other. The angle when it does not contact even when extended (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 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). This angle is preferably 10 ° or less, more preferably 5 ° or less, and 0 ° (the second slow axis and the orthogonal direction L or the first boundary line 13p are Most preferably). The second end region 13b also has a fourth slow axis, and the fourth slow axis has 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). The angle is preferably 10 ° or less, more preferably 5 ° or less, and 0 ° (the fourth slow axis and the orthogonal direction L or the second boundary line). Most preferably 13q is parallel). Thereby, although the details will be described later, the position of both end portions in the width direction of the retardation layer is the same as the position of both end portions in the width direction of the adhesive layer from the optical layered body with a base layer described later. Can be easily obtained.

The alignment state of the first end region 13a and the alignment state of the second end region 13b may be the same or different from each other. Also, the alignment state of the first adjacent region 13c _a The alignment state of the second adjacent region 13c _b, may be different from each other may be the same as each other. The alignment state of each region of the retardation layer 13 can be realized by adjusting the liquid crystal alignment of the liquid crystal compound forming the retardation layer. The liquid crystal alignment of the liquid crystal compound is, for example, the alignment regulation of the alignment layer. It can be adjusted by the force, and can be adjusted by the alignment axis of the alignment layer. For example, the third adjacent region 12c has _a first alignment axis, and the third end region 12a has a second alignment axis that is an alignment axis in a direction different from the first alignment axis. _a and the liquid crystal alignment of the liquid crystal compound contained in the first end region 13a can be adjusted. Further, the fourth adjacent regions 12c _b having a third orientation axis, by the fourth end region 12b having a fourth orientation axis is a direction different from the orientation axis and the third alignment axis, the second adjacent regions 13c The liquid crystal alignment of the liquid crystal compound contained in _b and the second end region 13b can be adjusted.

As described above, in the retardation film 1 shown in FIG. 1 (A) and (B), and phase difference characteristics are different from each other and the first end region 13a and the first adjacent region 13c _a retardation layer 13, also the phase difference characteristics are different from each other and the second end region 13b a second adjacent region 13c _b. Therefore, if the light transmittance of the retardation film 1 is observed using a mirror, a polarizing plate, etc., the range of the 1st end area | region 13a and the 2nd end area | region 13b can be recognized easily.

  The length in the width direction W of the first end region 13a is usually 50 mm or less, preferably 35 mm or less, more preferably 20 mm or less, and further preferably 10 mm or less. The length in 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 further preferably 10 mm or less. The lengths in the width direction W of the first end region 13a and the second end region 13b may be the same as or different from each other. The length in the width direction W of the third end region 12a is usually 60 mm or less, preferably 45 mm or less, more preferably 30 mm or less, and further preferably 20 mm or less. The length in the width direction W of the fourth end region 12b is usually 60 mm or less, preferably 45 mm or less, more preferably 30 mm or less, and further preferably 20 mm or less. The lengths in the width direction W of the third end region 12a and the fourth end region 12b may be the same as or different from each other. If the length in the width direction W of the first end region 13a and the second end region 13b and the length in the width direction W of the third end region 12a and the fourth end region 12b are within the above ranges, the first end region The region 13a and the second end region 13b can be easily recognized, and an adhesive layer to be described later can be easily disposed on these regions. Therefore, both ends of the adhesive layer laminated when obtaining the optical layered body with a base material layer to be described later are arranged on the first end region 13a and the first boundary line 13p, and on the second end region 13b and the second boundary line. It can be easily provided on 13q, and the range of the end portion of the retardation layer removed in the final product can be reduced.

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

  The angle formed between the first slow axis or the third slow axis and the orthogonal direction L is the angle formed between the first slow axis and the orthogonal direction L, or the third slow axis and the orthogonal direction L. Of the angles formed, an acute angle is assumed. The angle formed by the first slow axis or the third slow axis and the orthogonal direction is 0 ° means that the first slow axis or the third slow axis and the orthogonal direction are parallel. Further, the angle formed between the first slow axis and the first boundary line 13p can be regarded as an angle formed when the first slow axis and the first boundary line 13p are extended to contact each other. When it does not contact even if extended (when the first slow axis and the first boundary line 13p are parallel), the angle is 0 °. The angle formed between the third slow axis and the second boundary line 13q can be regarded as an angle formed when the third slow axis and the second boundary line 13q are extended to contact each other. However, the angle when not in contact (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 slow axes in different directions, and the second end region and the second adjacent region are mutually different. It has a slow axis in different directions. 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. You may have. 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 can be adjusted. The retardation film 1 can be obtained in which the retardation characteristics are different from each other, and the second end region and the second adjacent region of the retardation layer are different from each other in retardation characteristics.

[Optical laminate with substrate layer]
FIG. 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 material layer includes the retardation film 1 shown in FIG. 1B and the optical film 20, and the optical film 20 has a retardation through an adhesive layer 30. It is laminated on the retardation layer 13 of the film 1.

  As shown in FIG. 2, the end of the adhesive layer 30 on the first end region 13a side is on the first end region 13a of the retardation layer 13, and the end of the adhesive layer 30 on the second end region 13b side is , On the second end region 13 b of the retardation layer 13. The both end portions 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 end portions of the adhesive layer 30 are the same as the positions of both end portions of the retardation layer 13. There may be. Further, the end of the adhesive layer 30 on the first end region 13a side can be provided on the third end region 12a of the alignment layer 12, and the end of the adhesive layer 30 on the second end region 13b side is provided on the alignment layer. Twelve fourth end regions 12b can be provided. The adhesive layer 30 adheres the retardation layer 13 and the optical film 20, and the alignment layer 12 and the base material layer 11 are not directly attached to the optical film 20. The base material layer 11 can be peeled from 51 as a peeling layer.

In the phase difference film 1, as described above, it has a first end region 13a and the different phase difference characteristics first adjacent region 13c _a and each other of the retardation layer 13, and the second end region 13b and the second adjacent regions since the 13c _b has a different phase difference characteristics from each other, it is possible to easily recognize the range of the first end region 13a and second end region 13b. Thereby, when laminating | stacking the phase difference film 1 and the optical film 20, the position which does not protrude from the both ends of the phase difference layer 13 so that the base material layer 11 can be peeled from the optical laminated body 51 with a base material layer. The adhesive layer 30 can be provided by easily grasping. Further, a region of the retardation layer 13 that is not in direct contact with the adhesive layer 30 is usually removed in the final product, but the adhesive layer 30 is placed on the first end region 13a and the second end region 13b of the retardation layer 13. By providing in, the area | region which is not directly contacting with the contact bonding layer 30 among the phase difference layers 13 can be reduced, Therefore The part removed in a 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 is a slow axis in a direction that forms an angle of 20 ° or less with the orthogonal direction L (first boundary line 13p). The fourth slow axis of 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). Moreover, the edge part of the width direction W of the contact bonding layer 30 exists on the 1st end area | region 13a and the 2nd end area | region 13b. By peeling the base material layer 11 from the optical layered body 51 with the base material layer, the positions of both end portions in the width direction of the retardation layer are the same as the positions of both end portions in the width direction of the adhesive layer, as will be described later. It is possible to easily obtain an optical laminate.

(Optical laminate)
FIG. 3 is a schematic cross-sectional view schematically showing a state in which the release layer is peeled off from 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. 3, the optical laminate 81 is formed by laminating an optical film 20 and a single retardation layer 13 ′ (retardation layer-containing layer) via an adhesive layer 30. The alignment layer 12 ′ is included on the surface opposite to the adhesive layer 30 of 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 end portions in the width direction W may be outside the positions of both end portions in the width direction W of the adhesive layer 30, and one end portion in the width direction W of the adhesive layer 30 The position may be outside the position of one end in the width direction W.

The alignment layer 12 ′ has an alignment regulating force for aligning 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 that can exhibit different alignment regulating force in correspondence with each region of a retardation layer 13 ′ described later provided on the alignment layer 12. In the alignment layer 12 ', a third edge region 12'a and fourth end region 12'b in the width direction at both ends by the right down hatching in FIG. 3, the third adjacent regions 12c _a and a fourth adjacent adjacent thereto the region 12c _b, respectively, has an orientation axis capable of exhibiting alignment regulating force the phase difference characteristics can be imparted with the respective regions of the retardation layer 13 provided on '.

As shown in FIG. 3, the phase difference layer 13 ′ includes a first end region 13 ′ a including one end portion in the width direction W, and a first adjoining first end region 13 ′ a in the width direction W. has a region 13c _a, a second end region 13'b including the other end in the width direction is W, the second adjacent regions 13c _b adjacent to the second end region 13'b in the width direction W. In FIG. 3, the first end region 13 ′ a and the second end region 13 ′ b are indicated by diagonal lines rising to the right. The first boundary line 13p that forms the boundary between the first end region 13′a and the first adjacent region 13c _a is linear, and the first boundary line 13p that forms the boundary between the second end region 13′b and the second adjacent region 13c _b The two boundary lines 13q are also linear. The first boundary line 13p and the second boundary line 13q are parallel to the orthogonal direction L.

The first adjacent region 13ca 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 having 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, the phase difference layer 13 'has a first end region 13'a and the first adjacent region 13c _a and the phase difference characteristics are different from each other, and a second end region 13'b and the second adjacent regions 13c _b The phase difference characteristics are different from each other. The second slow axis is a slow axis in a direction that forms an angle of 20 ° or less with the orthogonal direction L that is a direction orthogonal to the width direction W in the plane of the retardation layer 13 ′. The axis is a slow axis in a direction that forms an angle of 20 ° or less with the orthogonal 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 laminated body 81 shown in FIG. 3, 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 ′, 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 the second boundary line 13q. It is a slow axis in a direction that forms an angle of 20 ° or less. The 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, the angle is 10 ° or less, more preferably 5 ° or less, and 0 ° (second slow axis and orthogonal direction L or first boundary line 13p). And are parallel). Further, the second end region 13′b of the retardation layer 13 ′ also has a fourth slow axis, and the fourth slow axis is a slow in a direction that forms an angle of 20 ° or less with the second boundary line 13q. Preferably, the angle is 10 ° or less, more preferably 5 ° or less, and 0 ° (the fourth slow axis and the second boundary line 13q are Most preferably).

The alignment state of the first end region 13′a and the alignment state of the second end region 13′b may be the same or different from each other. Also, the alignment state of the first adjacent region 13c _a The alignment state of the second adjacent region 13c _b, may be different from each other may be the same as each other. The alignment state of each region of the retardation layer 13 ′ can be realized by adjusting the liquid crystal alignment of the liquid crystal compound forming the retardation layer. The liquid crystal alignment of the liquid crystal compound is, for example, the alignment layer alignment. It can be adjusted by the regulating force and can be adjusted by the alignment axis of the alignment layer. For example, the third adjacent region 12ca has _a first alignment axis, and the third end region 12'a has a second alignment axis that is an alignment axis in a direction different from the first alignment axis. it is possible to adjust the crystal orientation of the liquid crystal compound contained in the region 13c _a and the first end region 13'a. Further, the fourth adjacent regions 12c _b having a third orientation axis, by the fourth end region 12'b having a fourth orientation axis is a direction different from the orientation axis and the third alignment axis, the second adjacent it is possible to adjust the crystal orientation of the liquid crystal compound contained in the regions 13c _b and second end regions 13'B.

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

The method for obtaining the optical laminate 81 shown in FIG. 3 is not particularly limited. For example, the base layer 11 (release layer) is formed in a direction parallel to the orthogonal direction L from the optical laminate 51 with a base layer shown in FIG. ) Can be obtained. Therefore, the optical film 20 and the adhesive layer 30 forming the optical laminate 81 can be the optical film 20 and the adhesive layer 30 of the optical laminate 51 with the base material layer, respectively, and the retardation layer 13 forming the optical laminate 81. 'And the alignment layer 12' may be layers derived from the retardation layer 13 and the alignment layer 12 of the optical layered body 51 with the base material layer, respectively. The first adjacent region 13c _a , the second adjacent region 13c _b , the first boundary line 13p, the second boundary line 13q, the third adjacent region 12c _a , and the fourth adjacent region 12c _b in the optical stacked body 81 are: The first adjacent region 13c _a , the second adjacent region 13c _b , the first boundary line 13p of the retardation layer 13 (FIG. 1B) included in the retardation film 1 that forms the optical layered body 51 with the base material layer, respectively. The second boundary line 13q, the third adjacent region 12c _a , and the fourth adjacent region 12c _b may be the first end region 13′a, the second end region 13′b, and the third end that form the optical stacked body 81. Area | region 12'a and 4th edge area | region 12'b are 1st edge area | regions of the phase difference layer 13 (FIG.1 (B)) contained in the phase difference film 1 which makes the optical laminated body 51 with a base material layer, respectively. 13a, second end region 13b, third end region 12a, and fourth end region 1 It may be a region derived from b. In addition, about description which is the same as the above-mentioned retardation film 1 and the optical laminated body 51 with a base material layer as description of each layer and each area | region, the description is abbreviate | omitted.

  When the optical layered body 81 is obtained by peeling the base material layer 11 as described above from the optical layered body 51 with the base material layer shown in FIG. 2, the orientation layer is applied to the peeled base material layer 11 as shown in FIG. 12 and part of the retardation layer 13 are likely to shift. This is because the length of the adhesive layer 30 in the width direction W is shorter than the length of the alignment layer 12 and the retardation layer 13 in the width direction W in the optical layered body 51 with the base material layer shown in FIG. 12 and the phase difference layer 13 are located outside both ends of the adhesive layer 30 in the width direction W, and are not fixed to the adhesive layer 30 directly or indirectly (in FIG. This is because it has a portion indicated by.

  As described above, in the optical layered body 51 with the base material layer shown in FIG. 2, the end of the adhesive layer 30 on the first end region 13a side is on the first end region 13a, and the second end of the adhesive layer 30 The end on the region 13b side is on the second end region 13b. Further, the end of the adhesive layer 30 on the first end region 13a side can be provided on the third end region 12a of the alignment layer 12, and the end of the adhesive layer 30 on the second end region 13b side is provided on the alignment layer. Twelve fourth end regions 12b can be provided. Therefore, when the base material layer 11 is peeled from the optical layered body 51 with the base material layer, the retardation layer 13 shown in FIG. 2 has the first end region 13a and the second end region 13b (indicated by the right-upward oblique lines in the figure). Part), the region fixed to the adhesive layer 30 (retardation layer 13 'shown in FIG. 3) and the non-fixed region (portion shown by dots in FIG. 2 and FIG. 3) transferred to the base material layer 11. To separate.

  The first end region 13a of the retardation layer 13 shown in FIG. 2 is a slow axis in a direction in which the second slow axis forms an angle of 20 ° or less with the orthogonal direction L (or the first boundary line 13p). 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 easily split along the slow axis direction. It is difficult to tear in a direction perpendicular to the axial direction.

  Therefore, when the first end region 13a has the second slow axis having the above angle and the second end region 13b has the fourth slow axis having the above angle, the peeling direction of the base material layer 11 is the orthogonal direction L. Therefore, the orientation directions of the slow axes of the first end region 13a and the second end region 13b are in a state parallel or nearly parallel to the peeling direction of the base material layer 11. Therefore, when the base material layer 11 is peeled, in the first end region 13a and the second end region 13b having the slow axis orientation direction parallel or nearly parallel to the peeling direction, the retardation layer 13 is in the peeling direction. The phase difference layer 13 ′ and the non-fixed region are easily separated well.

  Thus, in the optical laminated body 51 with a base material layer shown in FIG. 2, the retardation layer 13 is a retardation layer along the peeling direction of the base material layer 11 in the first end region 13a and the second end region 13b. It is easy to separate into 13 'and a non-fixed area | region favorably. As a result, there are wrinkles generated at the tear when the retardation layer 13 is separated into the retardation layer 13 ′ and the non-fixed region, and the wrinkle does not have a jagged contour in plan view due to the wrinkles. Can be prevented from occurring. As a result, as shown in FIG. 3, the optical layered body in which the positions of both end portions in the width direction W of the retardation layer 13 ′ and the alignment layer 12 ′ are the same as the positions of both end portions in the width direction W of the adhesive layer 30. 81 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 In the case where the first boundary line 13p is parallel), the peeling direction of the base material layer 11 and the direction of the second slow axis of the first end region 13a can be made parallel. In the first end region 13a, the separation can be made even better along the peeling direction of the base material layer 11. 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 (second boundary line 13q) (the fourth slow axis and the orthogonal direction L or In the case where the second boundary line 13q is parallel), the peeling direction of the base material layer 11 and the direction of the fourth slow axis of the second end region 13b can be made parallel. In the second end region 13b, the separation can be made even better along the peeling direction of the base material layer 11.

  On the other hand, the direction of the slow axis of the first end region 13a and the second end region 13b is parallel to the width direction W which is a direction orthogonal to the peeling direction of the base material layer 11, or parallel to the width direction W. 1st end region 13a and 2nd end region 13b are easy to tear in the direction (namely, width direction W) orthogonal to the peeling direction of the base material layer 11, or a direction close | similar to this. Therefore, even if the base material layer 11 is peeled off, the retardation layer 13 is not easily torn in the peeling direction of the base material layer 11 in the first end region 13a and the second end region 13b, and the retardation layer 13 is in the first end region. In some cases, the region 13a and the second end region 13b may not be separated, and wrinkles generated in the tear portion of the retardation layer 13 or a problem that the tear portion becomes jagged due to the wrinkle. Therefore, as described above, in the retardation film 1 and the optical layered body 51 with the base material layer, the first end region 13a of the retardation layer 13 has an angle that the second slow axis is 20 ° or less with the orthogonal direction L. The second end region 13b is preferably 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 layered body 81 described above, an optical layered body having an alignment layer has an alignment axis in a direction in which the third end region and the third adjacent region of the alignment layer are different from each other, and the fourth end region and the fourth end region. The adjacent regions may have orientation axes in 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 retardation layer can be adjusted, and the first end region and the first adjacent region of the retardation layer can be adjusted. Therefore, it is possible to obtain an optical laminated body in which the phase difference characteristics are different from each other, and the second end region and the second adjacent region of the phase difference layer are different in phase difference characteristics from each other.

[Method for producing retardation film]
As described above, the retardation layer 13 of the retardation film 1 comprises a liquid crystal compound, different orientation of the first end region 13a and the first adjacent region 13c _a, The second end region 13b and the second adjacent regions the alignment state of the 13c _b are also different. Therefore, it is preferable that the phase difference layer 13 aligns the liquid crystal compound in an alignment state corresponding to the region, and fixes the alignment state while maintaining the alignment state.

  The method for producing the retardation film 1 includes, for example, an alignment layer forming step for forming the alignment layer 12 on the base material layer 11 and a retardation for forming the retardation layer 13 (retardation layer-containing layer) on the alignment layer 12. And a layer forming step. In the manufacturing method of the phase difference film 1, it is preferable to perform the process of forming the orientation layer 12 and the phase difference layer 13 continuously, conveying the elongate base material layer 11 continuously.

  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 tilt alignment to the liquid crystal compound contained in the retardation layer. Examples of the alignment layer 12 include an alignment film made of an alignment polymer, a photo-alignment film using a photo-alignment polymer, or a groove alignment film. Among these, a photo-alignment polymer is used. The photo-alignment film is preferable.

  When the alignment layer 12 is an alignment film formed from an alignment polymer, the alignment regulating force can be arbitrarily adjusted according to the surface state and 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 material layer 11 to remove the solvent. Alternatively, the orientation layer 12 can be formed by applying the orientation polymer composition to the substrate layer 11 and removing the solvent, and then performing a known rubbing treatment. Examples of the method for varying the alignment regulating force of the alignment layer 12 depending on the region include different types of orientation polymers, different surface states, different rubbing treatment states, and the like. By performing masking when performing the steps, regions having different rubbing treatment states can be formed.

  As a coating method of the orientation polymer composition, a known coating method such as a spin coating method, an extrusion method, a gravure coating method, a die coating method, a bar coating method, or an applicator method, a printing method such as a flexo method, etc. Can be mentioned. Examples of the method for removing the solvent include a natural drying method, a ventilation drying method, a heat drying method, and a vacuum drying method.

  Further, when the alignment layer 12 is a photo-alignment film using a photo-alignment polymer, in the alignment layer forming step, a composition containing a polymer or monomer having a photoreactive group and a solvent (hereinafter referred to as “photo-alignment polymer”). The composition can be obtained by irradiating polarized light after the solvent is removed. As the polarized light to be irradiated, polarized ultraviolet rays are preferably used. The alignment layer 12 of the photo-alignment film can arbitrarily control the direction of the alignment regulating force by selecting the polarization direction of the polarized light applied to the coating layer of the photo-alignment polymer composition. Therefore, by performing pattern exposure using a mask when performing polarized light irradiation, regions having different alignment regulating forces can be formed.

  Examples of the method for applying the photo-alignable polymer composition 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. The polarized light irradiation may be performed by directly irradiating polarized light from the coating layer of the photoalignable polymer composition applied on the base material layer 11, or irradiating the polarized light from the base material layer 11 side. You may irradiate the transmitted polarized light to the said coating layer. The polarized light used for polarized light irradiation is preferably substantially parallel light. The wavelength of polarized light used for polarized light irradiation is not particularly limited as long as the photoreactive group of the polymer or monomer having a photoreactive group is in a wavelength region where light energy can be absorbed, but the wavelength is in the range of 250 to 400 nm. UV light (ultraviolet light) is preferable.

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

  In the retardation layer forming step, the retardation layer 13 is formed on the alignment layer 12 having different alignment regulating force (alignment axis) according to the region formed in the alignment layer forming step. For example, as described above, the alignment layer 12 includes a third end region having the second alignment axis, a third adjacent region having the first alignment axis, a fourth end region having the fourth alignment axis, and a third end region. A fourth adjacent region having an alignment axis may be formed. The retardation layer 13 is formed by, for example, applying a composition for forming a retardation layer containing a liquid crystal compound and a solvent on the alignment layer 12, removing the solvent, and then irradiating ultraviolet rays, thereby aligning the alignment layer 12. It can be formed by aligning the liquid crystal compound in an alignment state corresponding to the regulating force. Examples of the method for applying the retardation layer forming composition and the method for removing the solvent include the same methods as the method for applying the oriented polymer composition and the method for removing the solvent.

  As the liquid crystal compound forming the retardation layer, a polymerizable liquid crystal compound having a polymerizable group is preferably used. 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.

  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. However, when a polymerizable liquid crystal compound is used as the liquid crystal compound, polarized light irradiation is performed. It can also be adjusted by photo-aligning the polymerizable liquid crystal compound to develop or improve the orientation of the polymerizable liquid crystal compound. When performing polarized light irradiation, the alignment state of the polymerizable liquid crystal compound can be varied depending on the region by performing pattern exposure using a mask. For example, among the layers containing a polymerizable liquid crystal compound, liquid crystal molecules are aligned in a predetermined direction in an exposure region exposed by pattern exposure. By performing a thermal polymerization reaction of the polymerizable liquid crystal compound in this state, a slow axis is generated in the exposed region. Thereby, the orientation state of the retardation layer 13 can be varied depending on the region. The polarized light irradiated to the polymerizable liquid crystal compound is preferably polarized ultraviolet light.

[Manufacturing Method of Optical Laminate with Base Layer]
The manufacturing method of the optical laminated body 51 with a base material layer is
A step of preparing the retardation film 1;
Preparing the optical film 20;
It is preferable to include a laminating step of laminating the optical film 20 on the retardation layer 13 (retardation layer-containing layer) of the retardation film 1 via the adhesive layer 30. In the manufacturing method of the optical laminated body 51 with a base material layer, it is preferable to perform each process, using the elongate phase difference film 1 and the elongate optical film 20, and conveying these continuously.

  In the step of preparing the retardation film 1, for example, the retardation film 1 shown in FIGS. 1A and 1B may be prepared, and the retardation film is manufactured by the above-described manufacturing method of the retardation film. Also good. The adhesive layer 30 may be provided on the retardation layer 13 of the retardation film 1 or may be provided on the optical film 20. In any case, in the optical layered body 51 with the base material layer shown in FIG. 2, both end portions of the adhesive layer 30 are on the first end region 13 a and the second end region 13 b of the retardation layer 13 of the retardation film 1. It is preferable to provide the adhesive layer 30 so as to be on top. Further, the adhesive layer 30 may be provided so that both end portions of the adhesive layer 30 are on the third end region 12 a and the fourth end region 12 b of the alignment layer 12.

As described above, the retardation layer 13 of the retardation film 1, and a first end region 13a different phase difference characteristics first adjacent region 13c _a and each other, and the second end region 13b and the second adjacent and the region 13c _b has a different phase difference characteristics from each other. Therefore, the range of the first end region 13a and the second end region 13b is confirmed, and the adhesive layer 30 is bonded so that both ends in the width direction W are positioned on the first end region 13a and the second end region 13b. Layer 30 can be easily provided.

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

[Method for producing optical laminate]
The manufacturing method of the optical laminate 81 is as follows:
Preparing the optical layered body 51 with a base material layer;
The base material layer 11 (peeling layer) included in the optical layered body 51 with the base material layer is peeled in a direction parallel to the orthogonal direction L which is a direction orthogonal to the width direction W in the plane of the retardation layer 13. And a peeling step. In the manufacturing method of an optical laminated body, it is preferable to perform a peeling process, using a long optical laminated body with a base material layer, and conveying this continuously.

  In the step of preparing the optical layered body 51 with the base material layer, for example, the optical layered body 51 with the base material layer shown in FIG. 2 may be prepared. You may manufacture the optical laminated body 51 with a layer. In the peeling step, it suffices to peel in a direction parallel to the orthogonal direction L. In the optical layered body 51 with the base material layer shown in FIG. 2, the orthogonal direction L, the first boundary line 13p, and the second boundary line 13q Can be peeled in a direction parallel to the two boundary lines.

  In the peeling process, the alignment layer 12 and the retardation layer 13 are positioned outside both ends in the width direction W of the adhesive layer 30 by peeling the base material layer 11, and directly or indirectly to the adhesive layer 30. Specifically, the non-fixed region (the portion indicated by the dots in FIGS. 2 and 3) that is not fixed and the region fixed to the adhesive layer of the retardation layer 13 (retardation layer 13 ′ shown in FIG. 3). After separating, the non-fixed region moves to the base material layer 11 forming the release layer. At this time, the retardation layer 13 is separated into a non-fixed region and a 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 that forms 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 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 material layer 11 in the peeling step, the retardation layer 13 is separated from the retardation layer 13 ′ along the peeling direction of the base material layer 11 in the first end region 13a and the second end region 13b. It is easy to separate into non-fixed areas. Therefore, in the optical layered body 81 obtained by peeling the base material layer 11 by the peeling step, wrinkles generated at the tear when the retardation layer 13 is separated into the retardation layer 13 ′ and the non-fixed region, Due to the wrinkles, it is possible to suppress the occurrence of a problem such that the crack portion becomes jagged in plan view. Thereby, as shown in FIG. 3, the optical laminated body in which the positions of both end portions in the width direction W of the retardation layer 13 ′ and the alignment layer 12 ′ are the same as the positions of both end portions in the width direction W of the adhesive layer 30. 81 can be easily obtained.

  The retardation film, the optical layered body with a base material layer, and the optical layered body of the present embodiment may be changed as in the following modifications. Moreover, you may combine arbitrarily above-described 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 case where the retardation layer 13 has the first end region 13a and the second end region 13b at both ends in the width direction is taken as an example. As described above, the retardation film may have one of the first end region and the second end region. In this case, the retardation film may have one of the third end region and the fourth end region of the alignment layer 12. For example, in the optical layered body with a base material layer using the retardation film having the retardation layer having the first end region and not having the second end region, the adhesive layer is formed on the first end region or the first end region. By providing on the boundary line, the base material layer can be peeled off. When the base material layer is peeled off, the end of the adhesive layer in the width direction is the end of the retardation layer and the orientation layer on the first end region side. An optical layered body at the same position as the end of the can be obtained.

(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 is perpendicular to the orthogonal direction L (or the first boundary line 13p). Although the case where the slow axis is in the direction of forming an angle of 20 ° or less has been described as an example, the present invention is not limited to this. Retardation film, first slow axis of the first adjacent region 13c _a is, the orthogonal direction L (or the first boundary line 13p) and may be a slow axis in a direction forming an angle of 20 ° or less. Similarly, instead of the fourth slow axis of the second end region 13b of the retardation layer 13 being 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). the third slow axis of the second adjacent region 13c _b is the orthogonal direction L (or the second boundary line 13q) and may be a slow axis in a direction forming an angle of 20 ° or less.

In this case, the end portion of the first end region 13a side of the adhesive layer of the base layer with the optical stack are preferably provided on the first adjacent region 13c _a or the first boundary line 13p, the adhesive layer end of the second end region 13b side is preferably provided on the second neighboring region 13c _b or on the second boundary line 13q. It this case, the end portion of the first end region 13a side of the adhesive layer is provided on the third boundary between the adjacent regions 12c _a or on the third end region 12a and the third adjacent region 12c _a of the alignment layer 12 can be the ends of the second end region 13b side of the adhesive layer 30 may be provided on the fourth adjacent region 12c _b or on the fourth end region 12b and the boundary portion between the fourth adjacent region 12c _b of the alignment layer 12 it can. Thus, when separating the base layer, the first adjacent region 13c _a or the first boundary line 13p, and, in second adjacent regions 13c _b or the second boundary line 13q, the base layer is separated along the peeling direction As shown in FIG. 4, it is possible to obtain an optical laminate 82 in which the positions of both ends of the adhesive layer 30 are the same as the positions of both ends of the retardation layer 13 ″ and the alignment layer 12 ″. 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 81 shown in FIG. The phase difference layer 13 ′ may not include the first end region 13′a and the second end region 13′b that exist.In this case, the optical film 20 is formed at both end portions in the width direction W. The position may be outside the positions of both end portions in the width direction W of the adhesive layer 30, and one end portion in the width direction W is more than the position of one end portion in the width direction W of the adhesive layer 30. It may be outside.

(Modification 3 of the first embodiment)
In the optical laminated body 51 with a base material layer shown in FIG. 2 described above, the case where both end portions of the adhesive layer 30 are on the first end region 13a and the second end region 13b, respectively, will be described as an example. However, it is not limited to this. The edge part of the contact bonding layer 30 may be on the 1st boundary line 13p and the 2nd boundary line 13q, and the form which combined these arbitrarily may be sufficient. In this case, the end portion of the first end region 13a side of the adhesive layer 30 may be provided to the third end region 12a and the boundary between the third adjacent region 12c _a of the alignment layer 12, a second adhesive layer 30 end of the end region 13b side may be provided in the fourth end region 12b and the boundary portion between the fourth adjacent region 12c _b of the alignment layer 12. When both end portions of the adhesive layer 30 are on the first boundary line 13p and the second boundary line 13q, respectively, the base material layer is peeled from the optical layered body with the base material layer, whereby the optical shown in FIG. The laminated body 82 can be obtained. The optical layered body 82 shown in FIG. 4 is in the region derived from the first end region and the second end region of the retardation layer of the retardation film, that is, the retardation layer 13 ′ of the optical layered body 81 shown in FIG. The existing first end region 13′a and second end region 13′b may not be included.

(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. May not include one or both of these end regions. When both end portions of the retardation layer of the optical laminate have no end region, the optical laminate 82 shown in FIG. 4 can be obtained. As shown in FIG. 4, one of the retardation layers of the optical laminate 82 can be obtained. The region including the end portion is a region derived from the first adjacent region of the retardation film, and the region including 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 laminate 81 shown in FIG. 3 described above has been described by taking as an example the case where the optical film 20, the adhesive layer 30, the retardation layer 13 ′, and the alignment layer 12 ′ are laminated in this order. The optical laminated body may be the optical laminated body 83 shown in FIG. 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 does not include the alignment layer 12 ′ included in the optical laminated body 81 shown in FIG. In this case, in the optical laminated body 83 shown in FIG. 5, in the width direction W, the positions of both end portions of the adhesive layer 30 are the same as the positions of both end portions of the retardation layer 13 ′. Such an optical layered body 83 can be obtained, for example, by peeling off the base material layer 11 and the alignment layer 12 as a release layer from the optical layered body with a base material layer shown in FIG. 5). Also in this case, 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.

(Modification 6 of the first embodiment)
In the method for manufacturing the optical layered body 81 described above, the case where the substrate layer 11 is peeled off as the release layer from the optical layered body 51 with the substrate layer has been described as an example. The base material layer 11 and the alignment layer 12 may be peeled off as a peeling layer. In this case, as shown in FIG. 5, when the release layer (base material layer 11 and alignment layer 12) is peeled from the optical layered body with the base material layer, the optical film 20, the adhesive layer 30, and the retardation layer 13 ′ are It is possible to obtain an optical layered body 83 that is laminated in this order and in which the positions of both ends of the adhesive layer 30 and the positions of both ends of the retardation layer 13 ′ are the same. In addition, the layer contained in a peeling layer can be set by adjusting the relationship of the adhesive force between each layer in a phase difference film, for example.

  Also in Modification 2 and Modification 3 of the first embodiment described above, the base material layer and the alignment layer may be peeled off from the optical laminate with the base material layer as a release layer. In this case, as shown in FIG. 6, when the release layer (base material layer 11 and alignment layer 12) is peeled from the optical layered body with the base material layer, the optical film 20, the adhesive layer 30, and the retardation layer 13 ″ are It is possible to obtain an optical layered body 84 that is laminated in this order and in which both ends of the adhesive layer 30 and the positions of both ends of the retardation layer 13 ″ are the same. Also in this case, 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.

(Modification 7 of the first embodiment)
In the optical laminated body 51 with a base material layer shown in FIG. 2 described above, the case where the optical film 20 is provided is described as an example, but the present invention is not limited to this. For example, as illustrated in FIG. 7A, the optical film may be an optical laminate 52 with a base material layer that is a retardation film 10. Further, as shown in FIG. 7B, the optical film may be an optical laminate 53 with a base material layer that is a retardation layer 113, and the optical film is an alignment layer as shown in FIG. 112 and the optical laminated body 54 with a base material layer which is the retardation layer 113 may be used.

  The optical layered body 52 with a base material layer shown in FIG. 7A includes a retardation layer 13 of the retardation film 1 shown in FIG. 1B and a retardation layer 103 of the retardation film 10 as the optical film 20. Are laminated so as to face each other with the adhesive layer 30 interposed therebetween. The retardation film 10 as the optical film 20 includes a base material 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 the same as the positions of both ends of the retardation layer 103. It is preferable that In addition, the both ends of the adhesive layer 30 and the positions on the retardation layer 13 of the retardation 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 directly adhere to the retardation film 10. In addition, since the alignment layer 102 and the base material layer 101 are not directly bonded to the retardation layer film 1, the base material layers 11 and 101, the orientation layer 12, 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 regions having different retardation characteristics as in the retardation layer 13 of the retardation film 1. It may have. The alignment layer 102 of the retardation film 10 can have different alignment regulating force for each region according to the retardation characteristics of each region of the retardation layer 103 provided thereon.

  The optical layered body 53 with a base material layer shown in FIG. 7B has a retardation as the optical film 20 through the adhesive layer 30 on the retardation layer 13 of the retardation film 1 shown in FIG. The layer 113 is laminated. The optical laminated body 53 with a base material layer can be obtained by, for example, peeling the base material layer 101 and the alignment layer 102 from the optical laminated body 52 with a base material layer (FIG. 7A) (FIG. 7 ( B)), the retardation layer 113 shown in FIG. 7B is obtained from the retardation layer 103 shown in FIG. In this case, since the region located outside the both end portions in the width direction W of the adhesive layer 30 in the retardation layer 103 is a non-fixed region that is not directly fixed to the adhesive layer 30, FIG. ), A part of the retardation layer 103 is easily transferred to the peeled substrate layer 101 and the alignment layer 102. Therefore, for example, by using the retardation film 10 having a retardation characteristic as in the retardation film 1, the substrate layer and the alignment layer are peeled from the optical layered body 51 with the substrate layer (FIG. 2). In this case, the retardation layer 103 of the retardation film 10 can be easily torn along the peeling direction when the substrate layer 101 and the alignment layer 102 are peeled by the same principle as in FIG. In addition, this causes wrinkles that occur at the tear when the retardation layer 103 is separated into the retardation layer 113 and the non-fixed region, and the wrinkles do not have a jagged contour in plan view due to the wrinkles. It is also possible to suppress the occurrence of defects. In the optical layered body 53 with the base material layer thus obtained (FIG. 7B), the positions of both end portions of the retardation layer 113 in the width direction W are the same as the positions of both end portions of the adhesive layer 30. It can be.

  The optical layered body 54 with a base material layer shown in FIG. 7C is a retardation as the optical film 20 via the adhesive layer 30 on the retardation layer 13 of the retardation film 1 shown in FIG. The layer 113 and the alignment layer 112 are laminated in this order. The optical layered body 54 with a base material layer can be obtained, for example, by peeling the base material layer 101 from the optical layered body 52 with a base material layer (FIG. 7A) (FIG. 7C). A retardation layer 113 and an alignment layer 112 shown in FIG. 7C are obtained from the retardation layer 103 and the alignment layer 102 shown in FIG. 7A, respectively. In this case, the regions located outside the both end portions in the width direction W of the adhesive layer 30 in the retardation layer 103 and the alignment layer 102 are not fixed to the adhesive layer 30 directly or indirectly. Since it is a region, as shown in FIG. 7C, part of the retardation layer 103 and the alignment layer 102 easily migrates to the peeled substrate layer 101. Therefore, for example, by using the retardation film 10 having a retardation characteristic as in the retardation film 1, the substrate layer and the alignment layer are peeled from the optical layered body 51 with the substrate layer (FIG. 2). In the case of (FIG. 3), the retardation layer 103 of the retardation film 10 can be easily torn along the peeling direction when the substrate layer 101 is peeled. Moreover, it can also suppress that an above-mentioned wrinkle and malfunction generate | occur | produce in the tear part when the phase difference layer 103 is isolate | separated into the phase difference layer 113 and the non-fixed area | region. In the optical layered body 54 with the base material layer thus obtained (FIG. 7C), the positions of both end portions of the retardation layer 113 and the alignment layer 112 in the width direction W are set to both end portions of the adhesive layer 30. It can be the same as the position of.

[Second Embodiment]
This embodiment is different from the first embodiment in that it includes a retardation layer-containing layer including two retardation layers. In the following, the same members as those described in the previous embodiment are denoted by the same reference numerals, and description thereof is omitted.

[Phase difference film]
FIG. 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 with a base material layer shown in FIG. 7B described in Modification 7 of the first embodiment is used as a retardation film, this embodiment shown in FIG. The retardation film 100 of the form corresponds to the optical layered body 53 with a base material layer shown in FIG.

  As shown in FIG. 8A, the retardation film 100 includes a base material layer 11, an alignment layer 12, and a retardation layer-containing layer 130 in this order, and the retardation layer-containing layer 130 is sequentially from the alignment layer 12 side. The first retardation layer 13, the retardation layer adhesion 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 this embodiment, the first retardation layer 13 is distinguished from the second retardation layer 113. 13 is called.

  In the cross section of the retardation film 100 in the width direction W, the length in the width direction of the retardation layer adhesive layer 15 and the second retardation layer 113 are the same, and the width direction of the first retardation layer 13 is the same. It can be shorter than the length of. The positions in the width direction of both ends of the retardation layer adhesive layer 15 and the second phase difference layer 113 can be inside the positions in the width direction of both ends of the first retardation layer 13. The length in the width direction of the retardation layer adhesive layer 15 and the second retardation layer 113 is not limited to the example shown in FIG. 8A, but is the same as the length in the width direction of the first retardation layer 13. Alternatively, it may be longer than the length of the first retardation layer 13 in the width direction, and the positions in the width direction of both ends of the retardation layer adhesive layer 15 and the second retardation layer 113 are the positions of the first retardation layer 13. It may be the same as the position in the width direction at both ends or outside the position in the width direction at both ends of the first retardation layer 13. The length in the width direction of the retardation layer adhesive layer 15 may be the same as or different from the length in the width direction of the second retardation layer 113.

  About the base material layer 11 and the orientation layer 12, since it is as having demonstrated in previous embodiment, the description is abbreviate | omitted. The first retardation layer 13 corresponds to the retardation layer 13 shown in FIG. 7B. Since the retardation layer 13 has been described in the previous embodiment, the description thereof is omitted.

As shown in FIG. 8A, the second retardation layer 113 includes a first end region 113a including one end portion in the width direction W, and a first adjacent region adjacent to the first end region 113a in the width direction W. has a region 113c _a, a second end region 113b including the other end in the width direction is W, the second adjacent regions 113c _b adjacent to the second end region 113b in the width direction W. In FIG. 8A, the first end region 113a and the second end region 113b are indicated by diagonal lines rising to the right. In the second retardation layer 113, the first boundary line 113p formed between the first end region 113a of the boundary between the first adjacent region 113c _a is straight, a second end region 113b of the second adjacent region 113c _b The second boundary line 113q forming the boundary is also linear. The first boundary line 113p and the second boundary line 113q are parallel to the orthogonal direction L orthogonal to the width direction W in the plan view of the retardation film 100.

First adjacent region 113c _a second retardation layer 113 has a slow axis first '. The first end region 113a has a second 'slow axis that is a slow axis in a direction different from the first' slow axis. Further, the second adjacent region 113c _b having a slow axis 3 '. The second end region 113b has a fourth ′ slow axis that is a slow axis in a direction different from the third ′ slow axis.

The description of each region, each boundary line, and each slow axis of the second retardation layer 113 is the same as that of the retardation layer 13 (FIGS. 1A and 1B) described in the previous embodiment. Since it is the same, the description is omitted. Specifically, the first end region 113a, the second end region 113b, the first adjacent region 113c _a , the second adjacent region 113c _b , the first boundary line 113p, and the second boundary line 113q of the second retardation layer 113 are The first end region 13a, the second end region 13b, the first adjacent region 13c _a , and the second adjacent region 13c of the retardation layer 13 (FIGS. 1A and 1B) described in the previous embodiment, respectively. _b is the same as the description of the first boundary line 13p and the second boundary line 13q. In addition, the first ′ to 4 ′ slow axis of each of the above regions is the first to fourth slow retardation of each region of the retardation layer 13 (FIGS. 1A and 1B) described in the previous embodiment. This is the same as the description of the phase axis.

  The above-mentioned alignment state of each region of the second retardation layer 113 can be realized by adjusting the liquid crystal alignment of the liquid crystal compound forming the second retardation layer. It can be adjusted by the orientation regulating force of the layer. In the retardation film 100 shown in FIG. 8A, an alignment layer for regulating the orientation of the second retardation layer 113 is not shown, but as described in the method for manufacturing the retardation film 100 described later, The orientation state of each region of the two retardation layer 113 can also be realized by an orientation layer different from the orientation layer 12.

  The above descriptions of the first retardation layer 13 and the second retardation layer 113 are the same as those of the retardation layer 13 (FIGS. 1A and 1B) described in the previous embodiment. However, the first retardation layer 13 and the second retardation layer 113 may have different structures or the same structure.

  Since the first retardation layer 13 and the second retardation layer 113 have the retardation characteristics described above, the light of the retardation film 100 can be obtained using a mirror, a polarizing plate, and the like as described in the previous embodiment. If the transparency is observed, the ranges of the first end regions 13a and 113a and the second end regions 13b and 113b can be easily recognized. Moreover, although the details will be described later, the positions of both end portions in the width direction of the first retardation layer 13 and the second retardation layer 113 are both end portions in the width direction of the adhesive layer from the optical layered body with a base layer described later. An optical layered body having the same position as can be easily obtained.

[Optical laminate with substrate layer]
FIG. 8B 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 illustrated in FIG. 8B, the optical layered body 151 with the base material layer includes the retardation film 100 illustrated in FIG. 8A and the optical film 20, and the optical film 20 has the adhesive layer 30 interposed therebetween. The retardation layer 100 is laminated on the second retardation layer 113 of the retardation layer-containing layer 130 included in the retardation film 100.

  Both end portions in the width direction W of the adhesive layer 30 are the same as the positions of both end portions of the retardation layer-containing layer 130, or inside the width direction W from the positions of both end portions of the retardation layer-containing layer 130. Is preferred. Thereby, the adhesive layer 30 bonds the retardation layer-containing layer 130 and the optical film 20, and the alignment layer 12 and the substrate layer 11 are not directly bonded to the optical film 20. The base material layer 11 and the alignment layer 12 can be peeled from the layered optical laminate 151 as a peeling layer.

  As shown in FIG. 8B, the end of the adhesive layer 30 on the first end region 113a side is on the first end region 113a of the second retardation layer 113, and the second end region 113b of the adhesive layer 30. The side end is on the second end region 113b. The both end portions of the adhesive layer 30 are not particularly limited as long as they are on the first end region 113a and the second end region 113b, and the positions of both end portions of the adhesive layer 30 are the same as the positions of both end portions of the second retardation layer 113. It may be the same. Note that the positional relationship between the adhesive layer 30 and each region forming the first retardation layer 13 and the alignment layer 12 is as described in the previous embodiment, and thus the description thereof is omitted.

  In the optical layered body 151 with the base material 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 is the orthogonal direction L (first boundary line). 13p) is a slow axis in a direction that forms an angle of 20 ° or less, and the fourth slow axis of the second end region 13b is a direction that forms an angle of 20 ° or less with the orthogonal direction L (second boundary line 13q). Can be the slow axis. In addition, the second phase of the first end region 113a of the second retardation layer 113 in the retardation film 100 has a slow phase in a direction that forms an angle of 20 ° or less with the orthogonal direction L (first boundary line 113p). The 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 of the adhesive layer 30 in the width direction W is on the first end region 13 a and the second end region 13 b of the first retardation layer 13 and the first end region of the second retardation layer 113. 113a and second end region 113b. Further, the end portion of the adhesive layer 30 in the width direction W can be provided on the third end region 12 a and the fourth end region 12 b of the alignment layer 12.

  Thereby, by peeling the base material layer 11 and the alignment layer 12 from the optical layered body 151 with the base material layer, as described later, the first retardation layer and the second retardation layer included in the retardation layer-containing layer. It is possible to easily obtain an optical laminate in which the positions of both end portions in the width direction are the same as the positions of both end portions in the width direction of the adhesive layer.

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

  The first retardation layer 13 ′, the adhesive layer 30, and the optical film 20 are the same as the retardation layer 13 ′, the adhesive layer 30, and the optical film 20 (FIG. 3) described in the previous embodiment, respectively. The description thereof is omitted.

As shown in FIG. 8C, the second retardation layer 113 ′ includes a first end region 113′a including one end in the width direction W and a first end region 113′a in the width direction W. The adjacent first adjacent region 113c _a , the second end region 113′b including the other end in the width direction W, and the second adjacent region 113c _b adjacent to the second end region 113′b in the width direction W Have In FIG. 8C, the first end region 113′a and the second end region 113′b are indicated by a diagonal line rising to the right. The first boundary line 113p forming the boundary between the first end region 113'a and the first adjacent regions 113c _a is straight, the eggplant and second end region 113'b the boundary between the second adjacent regions 113c _b The two boundary lines 113q are also linear. The first boundary line 113p and the second boundary line 113q are parallel to the orthogonal direction L.

The first adjacent region 113ca has _a first 'slow axis. The first end region 113′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 113c _b having a slow axis 3 '. The second end region 113′b has a fourth ′ slow axis that is a slow axis in a direction different from the third ′ slow axis.

The description of each region, each boundary line, and each slow axis of the second retardation layer 113 ′ is the same as that of the retardation layer 13 ′ (FIG. 3) described in the previous embodiment. Is omitted. Specifically, the first end region 113′a, the second end region 113′b, the first adjacent region 113c _a , the second adjacent region 113c _b , the first boundary line 113p, and the second end region 113′b of the second retardation layer 113 ′. The two boundary lines 113q are respectively the first end region 13′a, the second end region 13′b, the first adjacent region 13c _a , and the second of the retardation layer 13 ′ (FIG. 3) described in the previous embodiment. This is the same as the description of the adjacent region 13c _b , the first boundary line 13p, and the second boundary line 13q. In addition, the first ′ to 4 ′ slow axis included in each region is the same as the description of the first to fourth slow axes included in each region of the retardation layer 13 (FIG. 3) described in the previous embodiment. is there.

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

  The above description of the first retardation layer 13 ′ and the second retardation layer 113 ′ is the same as the description of the retardation layer 13 ′ (FIG. 3) described in the previous embodiment. The retardation layer 13 ′ and the second retardation layer 113 ′ do not need to have the same structure, and may have different structures.

The method for obtaining the optical layered body 181 shown in FIG. 8C is not particularly limited. For example, the optical layered body 151 with the base material layer shown in FIG. It can be obtained by peeling the material layer 11 and the alignment layer 12 (peeling layer). Therefore, the optical film 20 and the adhesive layer 30 that form the optical laminate 181 can be the optical film 20 and the adhesive layer 30 of the optical laminate 151 with the base material layer, respectively, and the first retardation that forms the optical laminate 181. The layer 13 ′ and the second retardation layer 113 ′ may be layers derived from the first retardation layer 13 and the second retardation layer 113 of the optical layered body 151 with the base material layer, respectively. The first adjacent region 13c _a , the second adjacent region 13c _b , the first boundary line 13p, the second boundary line 13q, and the second retardation layer 113 ′ of the first retardation layer 13 ′ in the optical laminate 181 The first adjacent region 113c _a , the second adjacent region 113c _b , the first boundary line 113p, and the second boundary line 113q are each included in the retardation film 100 (FIG. 8A) forming the optical layered body 151 with the base material layer. 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, the first adjacent region 113c _a of the second retardation layer 113, the second The adjacent region 113c _b may be the first boundary line 113p and the second boundary line 113q. In addition, the first end region 13′a and the second end region 13′b of the first retardation layer 13 ′ forming the optical layered body 181 and the first end region 113′a and the second end region of the second retardation layer. 113′b is a first end region 13a and a second end region 13b of the first retardation layer 13 included in the retardation film 100 (FIG. 8A) forming the optical layered body 151 with the base material layer, respectively. The region may be derived from the first end region 113a and the second end region 113b of the two retardation layer 113.

  When the optical layered body 181 is obtained by peeling the base layer 11 and the alignment layer 12 as described above from the optical layered body 151 with the base layer shown in FIG. 8B, as shown in FIG. In addition, a part of the retardation layer-containing layer 130 is easily transferred to the peeled substrate layer 11 and alignment layer 12 side. This is because, in the optical layered body 151 with the base material 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 retardation layer-containing layer 130. The phase difference layer-containing layer 130 is located outside both ends of the adhesive layer 30 in the width direction W and is not fixed directly or indirectly to the adhesive layer 30 (in FIG. 8B). This is because it has a portion indicated by dots.

  As described above, in the optical layered body 151 with the base material layer illustrated in FIG. 8B, the end portion in the width direction W of the adhesive layer 30 is on the first end region 13 a of the first retardation layer 13 and the second end layer 13 a. It is on the end region 13 b and on the first end region 113 a and the second end region 113 b of the second retardation layer 113. Further, in the optical layered body 151 with the base material layer, the end portion in the width direction W of the adhesive layer 30 can be provided on the third end region 12 a and the fourth end region 12 b of the alignment layer 12. Therefore, when the base material layer 11 and the alignment layer 12 are peeled from the optical layered body 151 with the base material layer, the retardation layer-containing layer 130 is a region fixed to the adhesive layer 30 (the retardation layer shown in FIG. 8C). Content layer 130 ′) and non-fixed regions (portions indicated by dots in FIGS. 8B and 8C) that move to the release layer (base material layer 11 and alignment layer 12).

  In addition, the first retardation layer 13 illustrated in FIG. 8B has the retardation characteristics described in the previous embodiment. Further, the first end region 113a of the second retardation layer 113 shown in FIG. 8B also has a direction in which the second ′ slow axis forms an angle of 20 ° or less with the orthogonal direction L (or the first boundary line 113p). The 4 ′ slow axis of the second end region 113b is also a slow axis in a direction that forms an angle of 20 ° or less with the orthogonal direction L (or the second boundary line 113q). Therefore, when the release layer (base material layer 11 and alignment layer 12) is peeled from the optical layered body 151 with the base material layer in the orthogonal direction L orthogonal to the width direction W in the plan view, the base described in the previous embodiment is used. The retardation layer-containing layer 130 is easily torn along the peeling direction of the peeling layer based on the same principle as that for peeling the base material layer and the alignment layer from the optical layered body 51 with the material layer (FIG. 2) (FIG. 3). be able to.

  In this way, in the optical layered body 151 with the base material layer shown in FIG. 8B, the retardation layer-containing layer 130 is in the retardation layer-containing layer 130 ′ (FIG. 8C) along the peeling direction of the peeling layer. ) And non-fixed areas are easily separated. As a result, the wrinkles generated at the tear when the retardation layer-containing layer 130 is separated into the retardation layer-containing layer 130 ′ and the non-fixed region, and the wrinkles, the tear portion became jagged in plan view. It is possible to suppress the occurrence of a problem that the contour is not formed. As a result, as shown in FIG. 8C, the width direction W of the retardation layer-containing layer 130 ′, that is, the first retardation layer 13 ′, the retardation layer adhesive layer 15 ′, and the second retardation layer 113 ′. The optical laminated body 181 in which the positions of both end portions in the same as the positions of both end portions in the width direction W of the adhesive layer 30 can be easily obtained.

  Like the optical layered body 181 described above, the optical layered body having an alignment layer has alignment axes in directions in which the third end region and the third adjacent region of the alignment layer are different from each other. The adjacent regions may have orientation axes in 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 of the first retardation layer and It is possible to obtain an optical laminated body in which the first adjacent region has different phase difference characteristics, and the second end region of the first phase difference layer and the second adjacent region have different phase difference characteristics. it can.

[Method for producing retardation film]
9A and 9B are schematic cross-sectional views illustrating an example of a manufacturing process of the retardation film 100 illustrated in FIG. 8A. A step of forming the retardation film 1 and a step of forming the second retardation layer 113 on the first retardation layer 13 of the retardation film 1 through the retardation layer adhesive layer 15. it can. The step of forming the retardation film 1 is as described in the previous embodiment, and the alignment layer forming step of forming the alignment layer 12 on the base material layer 11 and the retardation layer 13 on the alignment layer 12 are performed. Forming. In the method for producing the retardation layer film 100, the step of forming the retardation layer 13 and the step of forming the second retardation layer 113 form the retardation layer containing layer 130 on the alignment layer 12. It becomes a formation process. In the method for producing the retardation film 100, the continuous orientation layer 12, the first retardation layer 13, the retardation layer adhesive layer 15, and the second layer are continuously conveyed while continuously conveying the long base material layer 11. A step of forming the retardation layer 113 is preferably performed.

  About the process of forming the alignment layer 12 and the 1st phase difference layer 13 in this order on the base material layer 11, the alignment layer 12 and the phase difference layer 13 are formed on the base material layer 11 demonstrated in previous embodiment. Since it is the same as the process to perform, the description is abbreviate | omitted.

  The step of forming the second retardation layer 113 can be performed using, for example, the retardation film 10. The retardation film 10 has the same structure as that of the retardation film 1 and includes a base material layer 101, an alignment layer 102, and a retardation layer 103 in this order, as shown in FIG. 9A. The retardation characteristics of the retardation layer 103 can be adjusted by the alignment regulating force of the alignment layer 102. The step of forming the second retardation layer 113 includes the step of laminating the retardation film 1 and the retardation film 10 via the retardation layer adhesive layer 15, and the base material layer 101 included in the retardation film 10. And a step of peeling off the alignment layer 102.

  In the step of laminating, as shown in FIG. 9A, the retardation film 1 and the retardation film 10 are formed with the retardation layer 13 and the retardation layer 103 through the retardation layer adhesive layer 15. Are stacked so that they face each other. Thereafter, in the step of peeling, the base material layer 101 and the alignment layer 102 on the retardation film 10 side are peeled (FIG. 9B). The base material layer 101 and the alignment layer 102 are preferably peeled in a direction parallel to the orthogonal direction L perpendicular to the width direction W in the plane of the retardation film 10.

  The retardation layer adhesive layer 15 can be provided so that the positions of both end portions in the width direction W are on the retardation layer 103 as shown in FIG. In this case, a region (dot portion in FIG. 9A) located outside the both end portions of the retardation layer 103 in the width direction W of the retardation layer adhesive layer 15 is the retardation layer adhesive layer 15. 9B, when peeling the base material layer 101 and the alignment layer 102, the peeling side (the base material layer 101 and the orientation layer 102). Part of the retardation layer 103 easily moves to the side). Thereby, the 2nd phase difference layer 113 is formed from the phase difference layer 103, and the phase difference film 100 which has the 1st phase difference layer 13 and the 2nd phase difference layer 113 can be manufactured (FIG. 9B). )).

  By using the retardation film 10 having the same retardation characteristics as the retardation film 1, the substrate layer and the alignment layer can be obtained from the optical layered body 51 with the substrate layer (FIG. 2) described in the previous embodiment. The phase difference layer 103 of the retardation film 10 can be easily torn along the peeling direction when the base material layer 101 and the alignment layer 102 are peeled by the same principle as in the case of peeling (FIG. 3). As a result, there is a problem that wrinkles are generated in a tear portion when the retardation layer 103 is separated into the retardation layer 113 and the non-fixed region, and the wrinkle portion does not have a jagged shape in a plan view due to the wrinkles. Occurrence can also be suppressed. Thereby, in the obtained retardation film 100, as shown in FIG. 9B, the positions of both ends of the retardation layer 113 in the width direction W are the positions of both ends of the adhesive layer 15 for the retardation layer. Can be the same.

  As will be described later, when the optical layered body 151 with the base material layer is obtained from the retardation film 100 and the optical layered body 181 is manufactured, the second retardation layer 113 is also fixed to the adhesive layer 30 as described above. Are separated into a region (second retardation layer 113 ′ shown in FIG. 8C) and an unfixed region that is not fixed. Therefore, the retardation characteristics of the retardation layer 103 of the retardation film 10 are such that the retardation layer 103 is well separated when the substrate layer 101 and the alignment layer 102 are peeled off, and the optical layered body 151 with the substrate layer is provided. Is preferably selected so that the second retardation layer 113 is well separated when the release layer (base material layer 11 and alignment layer 12) is peeled off.

For example, the retardation layer 103, in addition to providing an area corresponding to the first end region 13a, second end region 13b, the first adjacent region 13c _a and the second adjacent regions 13c _b described above (FIG. 1 (A) and (B)), a first end region 113a and the second end region 113b, by providing the first adjacent regions 113c _a and the second adjacent regions 113c _b (FIG. 8 (a)), the phase difference layer as described above It is possible to make two separations of the phase difference layer 103 and the retardation layer 113 good. In this case, the first end region 13a and the first end region 113a may be the same region or different regions. Similarly, the second end region 13b, the second end region 113b, and the first adjacent region 13c. _a and the first adjacent region 113c _a , the second adjacent region 13c _b and the second adjacent region 113c _b may be the same region or different regions. 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 outside of the first end region 113a in the width direction W. Preferably there is. 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 more in the width direction W than the second end region 113b. Preferably it is on the outside.

[Manufacturing Method of Optical Laminate with Base Layer]
The manufacturing method of the optical laminated body 151 with a base material layer is as follows:
A step of preparing the retardation film 100 (FIG. 8A);
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. 8B). In the manufacturing method of the optical laminated body 151 with a base material layer, it is preferable to perform each process, using the elongate phase difference film 100 and the elongate optical film 20, and conveying these continuously.

  In the step of preparing the retardation film 100, for example, the retardation film 100 shown in FIG. 8A may be prepared, or the retardation film 100 may be manufactured by the above-described method for manufacturing a retardation film. The adhesive layer 30 may be provided on the retardation layer-containing layer 130 of the retardation film 100 or may be provided on the optical film 20.

[Method for producing optical laminate]
The manufacturing method of the optical laminated body 181 includes a step of preparing an optical laminated body 151 with a base material layer (FIG. 8B),
The base layer 11 and the alignment layer 12 (peeling layer) included in the optical layered body with base layer 151 are perpendicular to the orthogonal direction L which is the direction orthogonal to the width direction W in the plane of the retardation layer-containing layer 130. It is preferable to have a peeling step of peeling in a parallel direction (FIG. 8C). In the manufacturing method of the optical laminated body 181, it is preferable to perform a peeling process, using the elongate optical laminated body 151 with a base material layer, conveying this continuously.

  In the step of preparing the optical layered body 151 with the base material layer, for example, the optical layered body 151 with the base material layer shown in FIG. 8B may be prepared. You may manufacture the optical laminated body 151 with a base material layer. In the peeling process, it is only necessary to peel in a direction parallel to the orthogonal direction L. In the optical layered body 151 with the base material layer shown in FIG. 8B, the orthogonal direction L, the first boundary lines 13p and 113p, and the first Since the two boundary lines 13q and 113q are in a parallel relationship, the separation can be performed in a direction parallel to the two boundary lines. Thereby, as described above, the retardation layer-containing layer 130 ′, that is, the first retardation layer 13 ′, the retardation layer adhesive layer 15 ′, and the second retardation layer 113 ′ shown in FIG. An optical laminate 181 in which the positions of both end portions in the width direction W are the same as the positions of both end portions in the width direction W of the adhesive layer 30 can be easily obtained.

  The retardation film, the optical layered body with a base material layer, and the optical layered body of the present embodiment may be changed as in the following modifications.

(Modification 1 of 2nd Embodiment)
In the retardation film 100 shown in FIG. 8A described above, the first end regions 13a and 113a and the second end regions 13b are provided at both ends in the width direction of the first retardation layer 13 and the second retardation layer 113, respectively. Although the case where it has 113b was mentioned as an example and demonstrated, the phase difference film may have any one among a 1st end area | region and a 2nd end area | region. In this case, the retardation film may have one of the third end region and the fourth end region of the alignment layer 12.

(Modification 2 of the second embodiment)
In the retardation film 100 shown in FIG. 8A described above, the second and 2 ′ slow axes of the first end regions 13a and 113a of the first retardation layer 13 and the second retardation layer 113 are orthogonal to each other. The case of the slow axis in the direction that forms an angle of 20 ° or less with L (or the first boundary line 13p) has been described as an example. However, the retardation film has the first difference between the first adjacent regions 13c _a and 113c _a . The 1,1 ′ slow axis may be 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, 113p). Similarly, the 4th and 4 'slow axes of the second end regions 13b and 113b of the first retardation layer 13 and the second retardation layer 113 are 20 ° with the orthogonal direction L (or the second boundary lines 13q and 113q). Instead of being a slow axis in a direction that forms the following angle, the third and 3 ′ slow axes of the second adjacent regions 13c _b and 113c _b are orthogonal to the orthogonal direction L (or the second boundary lines 13q and 113q). And a slow axis in a direction forming an angle of 20 ° or less.

In this case, the first end region 13a of the adhesive layer of the base layer with the optical stack, the ends of 113a side, the first adjacent region _13c a, 113c _a on or the first boundary line 13p, be provided on 113p The end portions of the adhesive layer on the second end regions 13b and 113b side are preferably provided on the second adjacent regions 13c _b and 113c _b or on the second boundary lines 13q and 113q. It this case, the end portion of the first end region 13a side of the adhesive layer is provided on the third boundary between the adjacent regions 12c _a or on the third end region 12a and the third adjacent region 12c _a of the alignment layer 12 can be the ends of the second end region 13b side of the adhesive layer 30 may be provided on the fourth adjacent region 12c _b or on the fourth end region 12b and the boundary portion between the fourth adjacent region 12c _b of the alignment layer 12 it can. Thereby, the optical laminated body with the same position of the both ends of the contact bonding layer 30 as the position of the both ends of a phase difference layer containing layer can be obtained (refer the optical laminated body 184 shown to FIG. 11 (A) mentioned later. ). The first retardation layer and the second retardation layer included in the optical laminate are regions derived from the first end region and the second end region of the first retardation layer and the second retardation layer of the retardation film, That is, the first end regions 13′a and 113′a and the second end regions 13 present in the first retardation layer 13 ′ and the second retardation layer 113 ′ of the optical layered body 181 shown in FIG. 'b, 113'b may not be included. In this case, in the optical film 20, the positions of both end portions in the width direction W may be outside the positions of both end portions in the width direction W of the adhesive layer 30, and one end portion in the width direction W is bonded. It may be outside the position of one end in the width direction W of the layer 30.

(Modification 3 of the second embodiment)
In the retardation film 100 shown in FIG. 8A described above, the base material layer 11, the alignment layer 12, the first retardation layer 13, the retardation layer adhesive layer 15, and the second retardation layer 113 are arranged in this order. Although the case where the layers are laminated is described as an example, the alignment layer 112 may be further provided on the second retardation layer 113 (FIG. 10). The alignment layer 112 has an alignment regulating force that adjusts the phase difference characteristics of the second retardation layer 113. Such a retardation film is manufactured by peeling off the base material layer 101 from the laminate of the retardation film 1 and the retardation film 10 shown in FIG. 9A via the retardation layer adhesive layer 15. can do. In this case, the alignment layer 112 illustrated in FIG. 10 is a layer derived from the alignment layer 102 illustrated in FIG.

(Modification 4 of the second embodiment)
In the retardation film 100 shown in FIG. 8A described above, both of the two retardation layers (the first retardation layer 13 and the second retardation layer 113) included in the retardation layer-containing layer are The case of having a region having different phase difference characteristics has been described as an example, but one of the phase difference layers has a region having different phase difference characteristics, and the other phase difference layer has a phase difference characteristic of It may be the same 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. However, the retardation film 100 includes three or more retardation layers. May be. When the retardation layer-containing layer includes three or more retardation layers, three or more retardation layers can be laminated by providing a retardation layer adhesive layer between the retardation 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 regions having different retardation characteristics.

(Modification 6 of the second embodiment)
In the optical layered body 151 with the base material layer shown in FIG. 8B described above, both end portions of the adhesive layer 30 are on the first end regions 13a and 113a and the second end regions 13b and 113b, respectively. However, the end portion of the adhesive layer 30 may be on the first boundary lines 13p and 113p and the second boundary lines 13q and 113q, and in an arbitrarily combined form. There may be. In this case, the end portion of the first end region 13a side of the adhesive layer 30 may be provided to the third end region 12a and the boundary between the third adjacent region 12c _a of the alignment layer 12, a second adhesive layer 30 end of the end region 13b side may be provided in the fourth end region 12b and the boundary portion between the fourth adjacent region 12c _b of the alignment layer 12. When both end portions of the adhesive layer 30 are on the first boundary lines 13p and 113p and the second boundary lines 13q and 113q, respectively, the substrate layer is peeled off from the optical layered body with the substrate layer. 11 (A), the positions of both end portions of the adhesive layer 30 are the first retardation layer 13 ″ forming the retardation layer-containing layer 130 ″, the retardation layer adhesive layer 15 ″, and the second position. The same optical layered body 184 as the positions of both end portions of the phase difference layer 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 region of the first retardation layer and the second retardation layer of the optical laminate with the base material layer, and A region derived from the second end region, that is, the first end region 13′a, which is present in the first retardation layer 13 ′ and the second retardation layer 113 ′ of the optical laminate 181 shown in FIG. 113′a and second end regions 13′b and 113′b may not be included. In this case, in the optical film 20, the positions of both end portions in the width direction W may be outside the positions of both end portions in the width direction W of the adhesive layer 30, and one end portion in the width direction W is bonded. It may be outside the position of one end in the width direction W of the layer 30.

(Modification 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 and the second end region 13 are formed on the first retardation layer 13 ′ and the second retardation layer 113 ′. The case where 'b, 113'b is included has been described as an example, but the optical layered body may not include one or both of these end regions. When both end portions of the first retardation layer and the second retardation layer of the optical laminate do not have end regions, the region including one end portion of the first retardation layer and the second retardation layer of the optical laminate is The region derived from the first adjacent region of the retardation film and the region including the other end are regions derived from the second adjacent region of the retardation film.

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

  In these cases, the positions of both end portions of the alignment layer in the width direction W are the same as the positions of both end portions of the adhesive layer 30. The optical laminated body 185 shown in FIG. 11B can be manufactured using, for example, a retardation film shown in FIG. In this case, the alignment layer 112 'is a layer derived from the alignment layer 112 shown in FIG. Moreover, the optical laminated body 186 shown in FIG.11 (C) can be obtained by peeling the base material layer 11 as a peeling layer from the optical laminated body 151 with a base material layer shown in FIG.8 (B), for example. . In this case, the alignment layer 12 ′ is a layer derived from the alignment layer 12 shown in FIG. The optical laminated body 187 shown in FIG. 12 can be manufactured using the retardation film shown in FIG. 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, 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.

Further, in each of the optical laminates 185 to 187 (FIGS. 11B and 11C, FIG. 12), the end portions of the adhesive layer 30 are on the first boundary lines 13p and 113p and the first adjacent regions 13c _a , It may be on 113c _a, may be on the second boundary lines 13q, 113q, or on the second adjacent regions 13c _b , 113c _b , or may be a form in which these are arbitrarily combined. In this case, the end portion of the adhesive layer 30 on the first end region 13a side can be provided at a boundary portion between the third end region and the third adjacent region of the alignment layers 12 ′ and 112 ′, The end portion on the two-end region 13b side can be provided at a boundary portion 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, the first boundary line 13p, 113p or on the first adjacent region _13c a, located on 113c _a, the other end, the second boundary line 13q, on 113q or the 2 on the adjacent regions 13c _b and 113c _b , as shown in FIGS. 13A to 13C, the positions of both end portions of the adhesive layer 30 are the alignment layer 12 ″, the first retardation layer 13 ″, Optical laminated bodies 188 to 190 having the same positions at both ends of the retardation layer adhesive layer 15 ″, the second retardation layer 113 ″, and the alignment layer 112 ″ can be obtained. These optical laminated bodies 188 to 190 are included. The first retardation layer 13 ″ and the second retardation layer 113 ″ are derived from the first end region and the second end region of the first retardation layer and the second retardation layer of the optical layered body with the base material layer. FIG. 11 (B) and FIG. 11 (C) and FIG. 2, the optical film 20 may also include at least one end portion in the width direction W of the adhesive layer 30 in the width direction W. It may be outside the position of the end.

(Modification 9 of the second embodiment)
In the optical layered body 181 shown in FIG. 8C described above, the two retardation layers (first retardation layer 13 ′ and second retardation layer 113 ′) included in the retardation layer-containing layer 130 ′. Each of the cases has been described by taking as an example the case of having regions having different phase difference characteristics, but is not limited thereto. For example, the retardation characteristics of the two retardation layers may be the same throughout, and one of the retardation layers has a region having different retardation characteristics, and the other retardation layer has the same position. The phase difference characteristics may be the same throughout.

(Modification 10 of the second embodiment)
In the optical laminate 181 shown in FIG. 8C described above, the case where the retardation layer-containing layer has two retardation layers has been described as an example. However, the optical layered body 181 includes three or more retardation layers. May be. When the retardation layer-containing layer includes three or more retardation layers, three or more retardation layers can be laminated by providing a retardation layer adhesive layer between the retardation layers. In this case, the retardation characteristics of all the retardation layers included in the retardation layer-containing layer may be the same throughout, or all the retardation layers may have regions having different retardation characteristics. At least one retardation layer may have regions having different retardation characteristics.

  As mentioned above, although embodiment of this invention and its modification were demonstrated, this invention is not limited to these embodiment and its modification, for example, each structure of said each embodiment and its modification, and Each process can also be implemented in combination.

(Base material layer)
A base material layer has a function as a support layer which supports the orientation layer and retardation layer which are formed on it. The base material layer is preferably a film formed of a resin material. As the resin material, for example, a resin material excellent in transparency, mechanical strength, thermal stability, stretchability and the like is used. Specifically, polyolefin resins such as polyethylene and polypropylene; cyclic polyolefin resins such as norbornene polymers; polyester resins such as polyethylene terephthalate and polyethylene naphthalate; (meth) acrylic acid, poly (meth) methyl acrylate, etc. (Meth) acrylic acid resins; cellulose ester resins such as triacetyl cellulose, diacetyl cellulose and cellulose acetate propionate; vinyl alcohol resins such as polyvinyl alcohol and polyvinyl acetate; polycarbonate resins; polystyrene resins; Arylate resin; Polysulfone resin; Polyethersulfone resin; Polyamide resin; Polyimide resin; Polyether ketone resin; Polyphenylene sulfide resin; Ren'okishido resins, and mixtures thereof, may be mentioned copolymer and the like. 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 a mixture thereof. The “(meth) acrylic acid” means “at least one of acrylic acid and methacrylic acid”.

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

  Arbitrary additives may be added to the resin material forming the film formed of the resin material. Examples of the additive include an ultraviolet absorber, an antioxidant, a lubricant, a plasticizer, a release agent, an anti-coloring agent, a flame retardant, a nucleating agent, an antistatic agent, a pigment, and a coloring agent.

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

  In order to improve the adhesion between the base material layer and the orientation layer, at least the surface of the base material layer on the side where the orientation layer is formed may be subjected to corona treatment, plasma treatment, flame treatment, etc. May be formed. In addition, by adjusting the components of the composition for forming the alignment layer used for forming the alignment layer and the components of the composition for forming the retardation layer used for forming the retardation layer, the above-mentioned adhesion is achieved. May be adjusted.

(Orientation layer)
The alignment layer is as described above in [Method for producing retardation film]. The thickness of the alignment layer is usually 10 to 500 nm, preferably 10 to 200 nm.

(Retardation layer)
The retardation layer is not particularly limited as long as it gives a predetermined phase difference to light. For example, a half-wave plate, a quarter-wave plate, a positive C plate, and a quarter-wave plate with reverse wavelength dispersion. And the like can be mentioned. The retardation layer can be formed using a known liquid crystal compound. The kind of liquid crystal compound is not particularly limited, and a rod-like liquid crystal compound, a disk-like liquid crystal compound, and a mixture thereof can be used. The liquid crystal compound may be a polymer liquid crystal compound, a polymerizable liquid crystal compound, or a mixture thereof.

(Optical film)
Examples of the optical film include a polarizing film, a reflective film, a transflective reflective film, a brightness enhancement film, an optical compensation film, and a film with an antiglare function. Moreover, you may have a structure similar to an above-described retardation film. The optical film may have a single-layer structure or a laminated optical film having a multilayer structure of two or more layers.

(Adhesive layer)
The adhesive layer can be formed of an adhesive, a pressure-sensitive adhesive, and a combination thereof, 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 or different materials.

  As an adhesive agent, it can form, for example, combining 1 type (s) or 2 or more types among a water-system adhesive agent, an active energy ray hardening-type adhesive agent, an adhesive, etc. Examples of the aqueous adhesive include an aqueous polyvinyl alcohol resin solution, an aqueous two-component urethane emulsion adhesive, and the like. The active energy ray-curable adhesive is an adhesive that is cured by irradiating active energy rays such as ultraviolet rays, for example, an adhesive containing a polymerizable compound and a photopolymerizable initiator, an adhesive containing a photoreactive resin, Examples thereof include those containing a binder resin and a photoreactive crosslinking agent. Examples of the polymerizable compound include photopolymerizable monomers such as a photocurable epoxy monomer, a photocurable acrylic monomer, and a photocurable urethane monomer, and oligomers derived from these monomers. As said photoinitiator, what contains the substance which generate | occur | produces active species, such as a neutral radical, an anion radical, and a cation radical, irradiating active energy rays, such as an ultraviolet-ray, can be mentioned.

  Examples of the pressure-sensitive adhesive include compositions in which a (meth) acrylic resin, styrene resin, 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 particularly preferably formed using an adhesive containing an ultraviolet curable epoxy monomer and a photocationic polymerization initiator.

(Adhesive layer for retardation layer)
The adhesive layer for retardation layer can be formed of an adhesive, a pressure-sensitive adhesive, and a combination thereof. The adhesive layer for retardation layer is usually one layer, but may be formed of two or more layers. When the retardation layer adhesive layer is composed of two or more layers, each layer may be formed of the same material, or may be formed of different materials.

  Examples of the adhesive and pressure-sensitive adhesive forming the adhesive layer for the retardation layer include those similar to the examples of the adhesive and pressure-sensitive adhesive used in the adhesive layer. An adhesive is preferably used as the retardation layer adhesive layer.

1,10 retardation film, 11 base material layer, 12, 12 ″ orientation 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 first adjacent region, 13c _b Second adjacent region, 13p first boundary line, 13q second boundary line, 15, 15 ', 15 "retardation layer adhesive layer, 20 optical film, 30 adhesive layer, 51, 52, 53, 54 with base material layer Optical layered body, 81, 82, 83, 84 Optical layered body, 100 retardation film, 101 substrate layer, 102, 112, 112 ′ orientation layer, 103, 113, 113 ′, 113 ″ second retardation layer (position 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 "phase difference layer-containing layer, 151 optical lamination with base material layer Body, 181, 184, 185, 186, 187, 188, 189, 190 optical laminate.

Claims (31)

A retardation film including a base layer, an alignment layer, and a retardation layer-containing layer including at least one retardation layer in this order,
The retardation layer has a first end region including one end portion 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 phase difference film, wherein the first end region has a second slow axis that is a slow axis in a direction different from the first slow axis.   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. Item 2. A retardation film according to Item 1.   The retardation film according to claim 1, wherein the alignment layer contains a photoalignable polymer. The retardation layer further includes a second end region including the other end portion 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 claim 1, wherein the second end region has a fourth slow axis that is a slow axis in a direction different from the third slow axis.   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 the plane of the retardation layer. The retardation film according to claim 4. A retardation film including a base layer, an alignment layer, and a retardation layer-containing layer including 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 portion 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 orientation axis;
The phase difference film, wherein the third end region has a second alignment axis that is an alignment axis in a direction different from the first alignment axis. The alignment layer includes 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 orientation axis;
The retardation film according to claim 6, wherein the fourth end region has a fourth orientation axis that is an orientation axis in a direction different from the first orientation axis. An optical laminate with a base material layer comprising the retardation film according to any one of claims 1 to 7 and an optical film,
The said optical film is an optical laminated body with a base material layer currently laminated | stacked on the said retardation layer content layer of the said retardation film through the contact bonding layer. An optical laminate with a base material layer comprising the retardation film according to any one of claims 1 to 5 and an optical film,
The optical film is laminated on the retardation layer-containing layer of the retardation film via 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 the orthogonal direction;
One end portion of the adhesive layer in the width direction is on the first end region of the retardation layer or on a first boundary line serving as a boundary between the first end region and the first adjacent region. An optical laminate with a base material layer. An optical laminate with a base material layer comprising the retardation film according to any one of claims 1 to 5 and an optical film,
The optical film is laminated on the retardation layer-containing layer of the retardation film via an adhesive layer,
The first slow axis of the first adjacent region is a slow axis in a direction that forms an angle of 20 ° or less with the orthogonal direction;
One end portion of the adhesive layer in the width direction is on the first adjacent region of the retardation layer or on a first boundary line serving as a boundary between the first end region and the first adjacent region. An optical laminate with a base material layer. The retardation film is a 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 the orthogonal direction;
The other end of the adhesive layer in the width direction is on the second end region of the retardation layer or on a second boundary line serving as a boundary between the second end region and the second adjacent region. The optical laminated body with a base material layer of Claim 9 or 10. The retardation film is a retardation film according to claim 4 or 5,
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 on the second adjacent region of the retardation layer or on a second boundary line serving as a boundary between the second end region and the second adjacent region. The optical laminated body with a base material layer of Claim 9 or 10. An optical layered body in which an optical film and a retardation layer-containing layer including at least one retardation layer are laminated via an adhesive layer,
The retardation layer includes a liquid crystal compound,
The retardation layer is 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 layered body according to claim 13, wherein the retardation layer has the same position of the other end in the width direction as the position of the other end in the width direction of the adhesive layer. Furthermore, the retardation layer-containing layer has an alignment layer on the retardation layer,
The optical laminated body according to claim 13 or 14, wherein a position of one end of the alignment layer is the same as a position of one end of the adhesive layer in the width direction.   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.   The optical layered body according to claim 15 or 16, wherein the alignment layer includes a photoalignable polymer. The retardation layer includes 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 laminated body according to any one of claims 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.   The optical axis 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 the plane of the retardation layer. Laminated body. The retardation layer further includes 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 layered body according to claim 18 or 19, wherein the second 'end region has a fourth slow axis which is a slow axis in a direction different from the third slow axis.   The optical axis 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 that is a direction orthogonal to the width direction in a plane of the retardation layer. Laminated body. 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 orientation axis;
18. The optical layered body according to claim 15, wherein the third ′ end region has a second orientation axis that is an orientation axis in a direction different from the first orientation axis. The alignment layer has a 4 ′ end region including the other end in the width direction, and a fourth adjacent region adjacent to the 4 ′ end region in the width direction,
The fourth adjacent region has a third orientation axis;
The optical laminated body according to claim 22, wherein the fourth 'end region has a fourth alignment axis that is an alignment axis in a direction different from the third alignment axis. It is a manufacturing method of phase contrast film given in any 1 paragraph of Claims 1-7,
An alignment layer forming step of forming the alignment layer on the base material layer;
A retardation layer forming step of forming the retardation layer-containing layer on the alignment layer. The alignment layer includes a photoalignable polymer,
The method for producing a retardation film according to claim 24, wherein the alignment layer forming step includes a step of irradiating the photo-alignable polymer with polarized ultraviolet rays. Preparing the retardation film according to any one of claims 1 to 7,
A step of preparing an optical film;
A lamination step of laminating the optical film on the retardation layer-containing layer of the retardation film via an adhesive layer. Preparing the retardation film according to any one of claims 1 to 5,
A step of preparing an optical film;
Laminating the optical film on the retardation layer-containing layer of the retardation film via an adhesive layer, and
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 that is a direction orthogonal to the width direction in the plane of the retardation layer,
In the adhesive layer provided in the laminating step, one end in the width direction is on the first end region of the retardation layer or 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 which exists on the 1st boundary line used. Preparing the retardation film according to any one of claims 1 to 5,
A step of preparing an optical film;
Laminating the optical film on the retardation layer-containing layer of the retardation film via an adhesive layer, and
The first slow axis of the first 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,
In the adhesive layer provided in the laminating step, one end in the width direction is on the first adjacent region of the retardation layer or 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 which exists on the 1st boundary line used. The retardation film is a 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 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 is on the second end region of the retardation layer or on a second boundary line serving as a boundary between the second end region and the second adjacent region. The manufacturing method of the optical laminated body with a base material layer of Claim 27 or 28. The retardation film is a retardation film according to claim 4 or 5,
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 an orthogonal direction that is a direction orthogonal to the width direction in the plane of the retardation layer,
The other end portion of the adhesive layer in the width direction is on the second adjacent region of the retardation layer or on a second boundary line serving as a boundary between the second end region and the second adjacent region. The manufacturing method of the optical laminated body with a base material layer of Claim 27 or 28. Preparing the optical layered body with a base material layer according to any one of claims 9 to 12,
Peeling for peeling the peeling layer including the base material layer included in the optical layered body with the base material layer in a direction parallel to the orthogonal direction which is a direction perpendicular to the width direction in the plane of the retardation layer A process for producing an optical layered body.

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