Long retardation film, long optical film, long polarizing film, method for producing long retardation film, and method for producing long optical film

Abstract

A long retardation film (10) including a long side direction (D2) and a short side direction (D1) is provided with a base material (20) and a retardation layer (40) overlapping the base material (20). The phase difference layer (40) includes a first region (41) and a pair of second regions (42). The first region (41) is located between the pair of second regions (42) in the short side direction (D1). The phase difference layer (40) contains a cured product of a liquid crystal composition. The second region (42) has a second slow axis (A42). A second orientation angle ([theta] 42) between the second slow axis (A42) and the longitudinal direction (D2) is at least 0 DEG and less than 10 DEG, or greater than 170 DEG and less than 180 DEG.

Description

Technical Field

[0001] The present invention relates to a long strip phase difference film, a long strip optical film, a long strip polarizing film, a method for manufacturing a long strip phase difference film, and a method for manufacturing a long strip optical film. Background Art

[0002] Phase difference film and polarizing film are applied to display devices such as organic EL display devices and liquid crystal display devices. As disclosed in JP2021-184046A, for phase difference film, a coating film can be formed on the substrate by coating a polymerizable liquid crystal composition on the substrate, and the coating film is cured to make it. By forming a long coating film on a long substrate and curing the coating film, a long phase difference film can be manufactured. Long polarizing films can be manufactured using long phase difference films. The roll-to-roll manufacturing method is excellent in production efficiency and manufacturing cost.

[0003] In JP2021-184046A, the phase difference layer of the long phase difference film is transferred to the long transferred film to produce a long polarizing film. In the long polarizing film produced in this way, burrs are sometimes generated at the ends of the transferred phase difference layer in the width direction. If burrs are generated, foreign matter will mix into the long polarizing film, and the production line will be contaminated by foreign matter.

[0004] The first and second disclosures are made in consideration of such a point, and their purpose is to suppress the generation of burrs at the end of the phase difference layer. Summary of the invention

[0005] <First Publication>

[0006] The first disclosure aims to suppress the generation of burrs at the end of the phase difference layer.

[0007] The long phase difference film disclosed in the first disclosure is a long phase difference film including a long side direction and a short side direction, wherein:

[0008] The long strip phase difference film has:

[0009] substrate; and

[0010] a phase difference layer overlapping the substrate,

[0011] The phase difference layer includes a first region and a pair of second regions.

[0012] The first region is located between the pair of second regions in the short side direction.

[0013] The phase difference layer includes a cured product of a liquid crystal composition.

[0014] The second region has a second slow axis,

[0015] A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0016] The long optical film disclosed in the first disclosure is a long optical film including a long side direction and a short side direction, wherein:

[0017] The long optical film comprises a substrate, a bonding layer and a phase difference layer in sequence.

[0018] The phase difference layer includes a first region and a pair of second regions.

[0019] The first region is located between the pair of second regions in the short side direction.

[0020] The phase difference layer includes a cured product of a liquid crystal composition.

[0021] The second region has a second slow axis,

[0022] A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0023] The first disclosed long polarizing film is a long polarizing film including a long side direction and a short side direction, wherein:

[0024] The long polarizing film has:

[0025] a polarizing layer comprising a polarizer; and

[0026] a phase difference layer overlapping the polarizing layer,

[0027] The phase difference layer includes a first region and a pair of second regions.

[0028] The first region is located between the pair of second regions in the short side direction.

[0029] The phase difference layer includes a cured product of a liquid crystal composition.

[0030] The second region has a second slow axis,

[0031] A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0032] The first disclosed method for producing a long phase difference film comprises the following steps:

[0033] Applying an alignment film-forming composition on a long substrate having a long side direction and a short side direction to form a first coating film;

[0034] Irradiating the end regions in the short-side direction of the first coating film and the central region other than the end regions with polarized light having different polarization states, thereby forming an alignment film having alignment restricting forces in different alignment directions in the end regions and the central region by the first coating film;

[0035] Applying a liquid crystal composition on an intermediate including the substrate and the alignment film to form a second coating film; and

[0036] The second coating film is cured to form a phase difference layer including a cured product of the liquid crystal composition.

[0037] The phase difference layer includes a first region facing the central region and a second region facing the end region.

[0038] The second region has a second slow axis,

[0039] A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0040] The first disclosed method for producing a long optical film comprises the following steps:

[0041] laminating the long phase difference film disclosed in the first disclosure on a long transfer film including a bonding layer; and

[0042] The substrate is peeled off from the long phase difference film bonded to the bonding layer.

[0043] According to the first disclosure, it is possible to suppress the generation of burrs at the end of the phase difference layer.

[0044] <Second Publication>

[0045] The second disclosure aims to suppress the generation of burrs at the end of the phase difference layer.

[0046] The second disclosed long phase difference film is a long phase difference film including a long side direction and a short side direction, wherein:

[0047] The long strip phase difference film has:

[0048] substrate; and

[0049] a phase difference layer overlapping the substrate,

[0050] The phase difference layer includes a first region, a pair of second regions, and a pair of third regions.

[0051] The first region is located between the pair of second regions in the short side direction.

[0052] The pair of second regions are located between the pair of third regions in the short side direction.

[0053] The phase difference layer includes a cured product of a liquid crystal composition.

[0054] The second region is non-oriented,

[0055] The third region is horizontally oriented.

[0056] The second disclosed long optical film is a long optical film including a long side direction and a short side direction, wherein:

[0057] The long optical film comprises a substrate, a bonding layer and a phase difference layer in sequence.

[0058] The phase difference layer includes a first region and a pair of second regions.

[0059] The first region is located between the pair of second regions in the short side direction.

[0060] The phase difference layer includes a cured product of a liquid crystal composition.

[0061] The second region is non-oriented.

[0062] The second disclosed long polarizing film is a long polarizing film including a long side direction and a short side direction, wherein:

[0063] The long polarizing film has:

[0064] a polarizing layer including a polarizer; and

[0065] a phase difference layer overlapping the polarizing layer,

[0066] The phase difference layer includes a first region and a pair of second regions.

[0067] The first region is located between the pair of second regions in the short side direction.

[0068] The phase difference layer includes a cured product of a liquid crystal composition.

[0069] The second region is non-oriented.

[0070] The method for producing a long phase difference film disclosed in the second disclosure comprises the following steps:

[0071] Applying an alignment film-forming composition on a long substrate having a long side direction and a short side direction to form a first coating film;

[0072] irradiating a central region of the first coating film except for the end regions in the short-side direction with polarized light, thereby forming an alignment film having an alignment regulating force in the central region by the first coating film;

[0073] Applying a liquid crystal composition on an intermediate including the substrate and the alignment film to form a second coating film; and

[0074] The second coating film is cured to form a phase difference layer including a cured product of the liquid crystal composition.

[0075] The phase difference layer includes: a first region facing the central region; a second region facing the end region; and a third region facing the substrate on the outside of the alignment film in the short side direction.

[0076] The third region is horizontally oriented.

[0077] The method for producing a long optical film disclosed in the second disclosure comprises the following steps:

[0078] The second disclosed long phase difference film is laminated on the long transfer film including the bonding layer; and

[0079] The substrate is peeled off from the long phase difference film bonded to the bonding layer.

[0080] According to the second disclosure, it is possible to suppress the generation of burrs at the end of the phase difference layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1 It is a figure for demonstrating 1st and 2nd embodiment, and is a longitudinal cross-sectional view which shows an example of a long-length retardation film.

[0082] Figure 2 It is shown Figure 1 A top view of an example of a long strip phase difference film.

[0083] Figure 3 It is a perspective view showing an example of a long phase difference film, a transferred film, a long optical film, and a long polarizing film.

[0084] Figure 4 is a diagram for explaining the first embodiment. Figure 2 A partial enlarged view of .

[0085] Figure 5 Yes Description Figure 4 A diagram showing an example of a method for producing a long phase difference film.

[0086] Figure 6 Yes Description Figure 5 FIG. 1 is a diagram of a manufacturing method.

[0087] Figure 7 Yes Description Figure 5 FIG. 1 is a diagram of a manufacturing method.

[0088] Figure 8 Yes Description Figure 5 FIG. 1 is a diagram of a manufacturing method.

[0089] Fig. 9 Yes Description Figure 5 FIG. 1 is a diagram of a manufacturing method.

[0090] Fig.10 Yes Description Figure 5 FIG. 1 is a diagram of a manufacturing method.

[0091] Fig.11 Yes Description Figure 5 FIG. 1 is a diagram of a manufacturing method.

[0092] Fig.12 is a diagram for explaining the second embodiment. Figure 2 A partial enlarged view of .

[0093] Fig.13 Yes Description Fig.12 A diagram showing an example of a method for producing a long phase difference film.

[0094] Fig.14 Yes Description Fig.13 FIG. 1 is a diagram of a manufacturing method.

[0095] Fig.15 Yes Description Fig.13 FIG. 1 is a diagram of a manufacturing method.

[0096] Fig.16 Yes Description Fig.13 FIG. 1 is a diagram of a manufacturing method.

[0097] Fig.17 Yes Description Fig.13 FIG. 1 is a diagram of a manufacturing method.

[0098] Fig.18 Yes Description Fig.13 FIG. 1 is a diagram of a manufacturing method.

[0099] Fig.19 It is shown that the use Figure 4 A longitudinal cross-sectional view of an example of a long optical film and a long polarizing film manufactured from a long phase difference film.

[0100] Fig. 20 It is shown that the use Fig.12 A longitudinal cross-sectional view of an example of a long optical film and a long polarizing film manufactured from a long phase difference film.

[0101] Fig.21 It is shown in Fig.19 and Fig. 20 A longitudinal cross-sectional view of an example of a transferred film used in the production of a long optical film and a long polarizing film.

[0102] Fig. 22Yes Description Fig.19 and Fig. 20 A diagram showing an example of a method for producing a long optical film and a long polarizing film.

[0103] Fig.23 Yes Description Fig. 22 FIG. 1 is a diagram of a manufacturing method.

[0104] Fig.24 Yes Description Fig. 22 FIG. 1 is a diagram of a manufacturing method.

[0105] Fig.25 Yes Description Fig. 22 FIG. 1 is a diagram of a manufacturing method.

[0106] Fig.26 Yes Description Fig. 22 FIG. 1 is a diagram of a manufacturing method.

[0107] Fig. 27 Yes Description Fig. 22 FIG. 1 is a diagram of a manufacturing method.

[0108] Fig.28 It is shown by Fig.19 and Fig. 20 A diagram showing an application example of an optical film and a polarizing film obtained by using a long optical film and a long polarizing film.

[0109] Fig.29 It is a figure which shows another application example of an optical film and a polarizing film.

[0110] Fig.30 This is a cross-sectional view showing the long phase difference film of Example 1-1 together with the transferred film.

[0111] Fig.31 This is a cross-sectional view showing the long phase difference film of Example 1-2 together with the transferred film.

[0112] Fig.32 This is a cross-sectional view showing the long phase difference film of Example 2-1 together with the transferred film.

[0113] Fig.33 It is a cross-sectional view showing the long phase difference film of Comparative Example 1 together with the transferred film.

[0114] Fig.34 It is a cross-sectional view showing the long phase difference film of Comparative Example 2 together with the transferred film.

[0115] Fig.35 It is a cross-sectional view showing the long phase difference film of Comparative Example 3 together with the transferred film.

[0116] Fig.36 This is a photograph showing the long optical film of Example 1-1.

[0117] Fig.37 This is a photograph showing the long optical film of Example 2-1.

[0118] Fig.38 This is a photograph showing the long optical film of Comparative Example 1.

[0119] Fig.39 This is a photograph showing the long optical film of Comparative Example 2.

[0120] Fig.40 This is a photograph showing the long optical film of Comparative Example 3. DETAILED DESCRIPTION

[0121] The long phase difference film disclosed in the first disclosure is a long phase difference film including a long side direction and a short side direction, wherein:

[0122] The long strip phase difference film has:

[0123] substrate; and

[0124] a phase difference layer overlapping the substrate,

[0125] The phase difference layer includes a first region and a pair of second regions.

[0126] The first region is located between the pair of second regions in the short side direction.

[0127] The phase difference layer includes a cured product of a liquid crystal composition.

[0128] The second region has a second slow axis,

[0129] A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0130] In the long phase difference film disclosed in the first disclosure,

[0131] The first region may have a first slow axis,

[0132] An absolute value of a value obtained by subtracting 90° from a first orientation angle between the first slow axis and the long-side direction may be smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

[0133] In the long phase difference film disclosed in the first disclosure,

[0134] The first orientation angle may be greater than or equal to 10° and less than or equal to 170°.

[0135] In the long phase difference film disclosed in the first disclosure,

[0136] The first orientation angle may be greater than or equal to 30° and less than or equal to 150°.

[0137] In the long phase difference film disclosed in the first disclosure,

[0138] The first region may include a center of the phase difference layer in the short-side direction.

[0139] In the long phase difference film disclosed in the first disclosure,

[0140] A length of the second region along the short side direction may be greater than or equal to 1 mm and less than or equal to 100 mm.

[0141] In the long phase difference film disclosed in the first disclosure,

[0142] A length of the first region along the short side direction may be 12 times or more of a length of the second region along the short side direction.

[0143] In the long phase difference film disclosed in the first disclosure,

[0144] The phase difference layer may further include a pair of third regions.

[0145] The pair of second regions may also be located between the pair of third regions in the short side direction.

[0146] The first region may have a first slow axis,

[0147] The third region may have a third slow axis,

[0148] An absolute value of a value obtained by subtracting 90° from a third orientation angle between the third slow axis and the long-side direction may be smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

[0149] In the long phase difference film disclosed in the first disclosure,

[0150] The third orientation angle may be greater than or equal to 40° and less than or equal to 140°.

[0151] In the long phase difference film disclosed in the first disclosure,

[0152] The third region may include an end portion of the phase difference layer in the short-side direction.

[0153] The long phase difference film disclosed in the first aspect may include an alignment film located between the substrate and the first region and the second region.

[0154] The third region may be in contact with the substrate.

[0155] In the long phase difference film disclosed in the first disclosure,

[0156] The alignment film may include a photo-alignment film.

[0157] In the long phase difference film disclosed in the first disclosure,

[0158] The substrate may include a polyester film having a slow axis,

[0159] An angle between the slow axis of the polyester film and the long-side direction may be 40° or more and 140° or less.

[0160] In the long phase difference film disclosed in the first disclosure,

[0161] A length of the third region along the short side direction may be greater than or equal to 0.5 mm and less than or equal to 50 mm.

[0162] In the long phase difference film disclosed in the first disclosure,

[0163] The in-plane phase difference Re(450) in the first region of the phase difference layer at a wavelength of 450 nm may be smaller than the in-plane phase difference Re(550) in the first region of the phase difference layer at a wavelength of 550 nm.

[0164] The in-plane retardation Re(550) may be smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm.

[0165] The in-plane phase difference Re(550) may be greater than or equal to 130 nm and less than or equal to 153 nm.

[0166] The long optical film disclosed in the first disclosure is a long optical film including a long side direction and a short side direction, wherein:

[0167] The long optical film comprises a substrate, a bonding layer and a phase difference layer in sequence.

[0168] The phase difference layer includes a first region and a pair of second regions.

[0169] The first region is located between the pair of second regions in the short side direction.

[0170] The phase difference layer includes a cured product of a liquid crystal composition.

[0171] The second region has a second slow axis,

[0172] A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0173] In the long optical film disclosed in the first disclosure,

[0174] The first region may have a first slow axis,

[0175] An absolute value of a value obtained by subtracting 90° from a first orientation angle between the first slow axis and the long-side direction may be smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

[0176] In the long optical film disclosed in the first disclosure,

[0177] The first orientation angle may be greater than or equal to 10° and less than or equal to 170°.

[0178] The first disclosed long polarizing film is a long polarizing film including a long side direction and a width direction, wherein:

[0179] The long polarizing film has:

[0180] a polarizing layer comprising a polarizer; and

[0181] a phase difference layer overlapping the polarizing layer,

[0182] The phase difference layer includes a first region and a pair of second regions.

[0183] The first region is located between the pair of second regions in the short side direction.

[0184] The phase difference layer includes a cured product of a liquid crystal composition.

[0185] The second region has a second slow axis,

[0186] A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0187] In the long polarizing film disclosed in the first disclosure,

[0188] The first region may have a first slow axis,

[0189] An absolute value of a value obtained by subtracting 90° from a first orientation angle between the first slow axis and the long-side direction may be smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

[0190] In the long polarizing film disclosed in the first disclosure,

[0191] The first orientation angle may be greater than or equal to 10° and less than or equal to 170°.

[0192] In the long polarizing film disclosed in the first disclosure,

[0193] The first orientation angle may be greater than or equal to 30° and less than or equal to 150°.

[0194] In the long polarizing film disclosed in the first disclosure,

[0195] The second region may include an end portion of the phase difference layer in the short-side direction.

[0196] In the long polarizing film disclosed in the first disclosure,

[0197] The first region may include the center in the short side direction.

[0198] In the long polarizing film disclosed in the first disclosure,

[0199] A length of the second region along the short side direction may be greater than or equal to 1 mm and less than or equal to 100 mm.

[0200] In the long polarizing film disclosed in the first disclosure,

[0201] A length of the first region along the short side direction may be 12 times or more of a length of the second region along the short side direction.

[0202] In the long polarizing film disclosed in the first disclosure,

[0203] The in-plane phase difference Re(450) in the first region of the phase difference layer at a wavelength of 450 nm may be smaller than the in-plane phase difference Re(550) in the first region of the phase difference layer at a wavelength of 550 nm.

[0204] The in-plane retardation Re(550) may be smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm.

[0205] The in-plane phase difference Re(550) may be greater than or equal to 130 nm and less than or equal to 153 nm.

[0206] The first disclosed method for producing a long phase difference film comprises the following steps:

[0207] Applying an alignment film-forming composition on a long substrate having a long side direction and a short side direction to form a first coating film;

[0208] Irradiating the end regions in the short-side direction of the first coating film and the central region other than the end regions with polarized light having different polarization states, thereby forming an alignment film having alignment restricting forces in different alignment directions in the end regions and the central region by the first coating film;

[0209] Applying a liquid crystal composition on an intermediate including the substrate and the alignment film to form a second coating film; and

[0210] The second coating film is cured to form a phase difference layer including a cured product of the liquid crystal composition.

[0211] The phase difference layer includes a first region facing the central region and a second region facing the end region.

[0212] The second region has a second slow axis,

[0213] A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0214] In the method for producing a long phase difference film disclosed in the first aspect,

[0215] The first region may have a first slow axis,

[0216] An absolute value of a value obtained by subtracting 90° from a first orientation angle between the first slow axis and the long-side direction may be smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

[0217] In the method for producing a long phase difference film disclosed in the first aspect,

[0218] The first orientation angle may be greater than or equal to 10° and less than or equal to 170°.

[0219] In the method for producing a long phase difference film disclosed in the first aspect,

[0220] The first orientation angle may be greater than or equal to 30° and less than or equal to 150°.

[0221] In the method for producing a long phase difference film disclosed in the first aspect,

[0222] The first region may include the center in the short side direction.

[0223] In the method for producing a long phase difference film disclosed in the first aspect,

[0224] A length of the second region along the short side direction may be greater than or equal to 1 mm and less than or equal to 100 mm.

[0225] In the method for producing a long phase difference film disclosed in the first aspect,

[0226] A length of the first region along the short side direction may be 12 times or more of a length of the second region along the short side direction.

[0227] In the method for producing a long phase difference film disclosed in the first aspect,

[0228] The phase difference layer may further include a pair of third regions.

[0229] The pair of second regions may also be located between the pair of third regions in the short side direction.

[0230] The first region may have a first slow axis,

[0231] The third region may have a third slow axis,

[0232] An absolute value of a value obtained by subtracting 90° from a third orientation angle between the third slow axis and the long-side direction may be smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

[0233] In the method for producing a long phase difference film disclosed in the first aspect,

[0234] The third orientation angle may be greater than or equal to 40° and less than or equal to 140°.

[0235] In the method for producing a long phase difference film disclosed in the first aspect,

[0236] The third region may include an end portion of the phase difference layer in the short-side direction.

[0237] In the method for producing a long phase difference film disclosed in the first aspect,

[0238] The third region may be in contact with the substrate.

[0239] In the method for producing a long phase difference film disclosed in the first aspect,

[0240] The substrate may include a polyester film having a slow axis,

[0241] An angle between the slow axis of the polyester film and the long-side direction may be 40° or more and 140° or less.

[0242] In the method for producing a long phase difference film disclosed in the first aspect,

[0243] A length of the third region along the short side direction may be greater than or equal to 0.5 mm and less than or equal to 50 mm.

[0244] In the method for producing a long phase difference film disclosed in the first aspect,

[0245] The in-plane phase difference Re(450) in the first region of the phase difference layer at a wavelength of 450 nm may be smaller than the in-plane phase difference Re(550) in the first region of the phase difference layer at a wavelength of 550 nm.

[0246] The in-plane retardation Re(550) may be smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm.

[0247] The in-plane phase difference Re(550) may be greater than or equal to 130 nm and less than or equal to 153 nm.

[0248] The first disclosed method for producing a long optical film comprises the following steps:

[0249] laminating the long phase difference film disclosed in the first disclosure on a long transfer film including a bonding layer; and

[0250] The substrate is peeled off from the long phase difference film bonded to the bonding layer.

[0251] In the method for producing a long optical film disclosed in the first aspect,

[0252] The long optical film may include the first region of the phase difference layer and a part of the second region.

[0253] The remaining portion of the second region of the phase difference layer except for the portion may remain on the substrate.

[0254] In the method for producing a long optical film disclosed in the first aspect,

[0255] In a state where the long phase difference film is stacked on the transferred film, the second region may face an end portion of the bonding layer in the short-side direction.

[0256] In the method for producing a long optical film disclosed in the first aspect,

[0257] The long optical film may include the first region of the phase difference layer and a part of the second region.

[0258] The third region and the second region of the phase difference layer except for the portion may remain on the substrate.

[0259] In the method for producing a long optical film disclosed in the first aspect,

[0260] When the long strip phase difference film is stacked on the transferred film, the second region can face the end of the bonding layer in the short side direction, and the third region can be located on the outside of the bonding layer in the short side direction, or face the substrate of the transferred film.

[0261] In the method for producing a long optical film disclosed in the first aspect,

[0262] The transferred film may include a polarizing layer including a polarizer.

[0263] The second disclosed long phase difference film is a long phase difference film including a long side direction and a short side direction, wherein:

[0264] The long strip phase difference film has:

[0265] substrate; and

[0266] a phase difference layer overlapping the substrate,

[0267] The phase difference layer includes a first region, a pair of second regions, and a pair of third regions.

[0268] The first region is located between the pair of second regions in the short side direction.

[0269] The pair of second regions are located between the pair of third regions in the short side direction.

[0270] The phase difference layer includes a cured product of a liquid crystal composition.

[0271] The second region is non-oriented,

[0272] The third region is horizontally oriented.

[0273] In the long phase difference film disclosed in the second disclosure,

[0274] The third region may have a third slow axis,

[0275] A third orientation angle between the third slow axis and the long-side direction may be greater than or equal to 40° and less than or equal to 140°.

[0276] In the long phase difference film disclosed in the second disclosure,

[0277] The first region may have a first slow axis,

[0278] A first orientation angle between the first slow axis and the long-side direction may be 10° or more and 80° or less, or 100° or more and 170° or less.

[0279] In the long phase difference film disclosed in the second disclosure,

[0280] The third region may include an end portion of the phase difference layer in the short-side direction.

[0281] In the long phase difference film disclosed in the second disclosure,

[0282] The first region may include a center of the phase difference layer in the short-side direction.

[0283] The second disclosed long phase difference film may include an alignment film located between the substrate and the first region and the second region.

[0284] The third region may be in contact with the substrate.

[0285] In the long phase difference film disclosed in the second disclosure,

[0286] The alignment film may include a photo-alignment film.

[0287] In the long phase difference film disclosed in the second disclosure,

[0288] The substrate may comprise a polyester film.

[0289] In the long phase difference film disclosed in the second disclosure,

[0290] The polyester film may have a slow axis,

[0291] An angle between the slow axis of the polyester film and the long-side direction may be 40° or more and 140° or less.

[0292] In the long phase difference film disclosed in the second disclosure,

[0293] A length of the second region along the short side direction may be greater than or equal to 1 mm and less than or equal to 200 mm.

[0294] In the long phase difference film disclosed in the second disclosure,

[0295] A length of the third region along the short side direction may be greater than or equal to 0.5 mm and less than or equal to 50 mm.

[0296] In the long phase difference film disclosed in the second disclosure,

[0297] A length of the first region along the short side direction may be 6 times or more of a length of the second region along the short side direction.

[0298] In the long phase difference film disclosed in the second disclosure,

[0299] The in-plane phase difference Re(450) in the first region of the phase difference layer at a wavelength of 450 nm may be smaller than the in-plane phase difference Re(550) in the first region of the phase difference layer at a wavelength of 550 nm.

[0300] The in-plane retardation Re(550) may be smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm.

[0301] The in-plane phase difference Re(550) may be greater than or equal to 130 nm and less than or equal to 153 nm.

[0302] The second disclosed long optical film is a long optical film including a long side direction and a short side direction, wherein:

[0303] The long optical film comprises a substrate, a bonding layer and a phase difference layer in sequence.

[0304] The phase difference layer includes a first region and a pair of second regions.

[0305] The first region is located between the pair of second regions in the short side direction.

[0306] The phase difference layer includes a cured product of a liquid crystal composition.

[0307] The second region is non-oriented.

[0308] The second disclosed long polarizing film is a long polarizing film including a long side direction and a width direction, wherein:

[0309] The long polarizing film has:

[0310] a polarizing layer including a polarizer; and

[0311] a phase difference layer overlapping the polarizing layer,

[0312] The phase difference layer includes a first region and a pair of second regions.

[0313] The first region is located between the pair of second regions in the short side direction.

[0314] The phase difference layer includes a cured product of a liquid crystal composition.

[0315] The second region is non-oriented.

[0316] In the second disclosed long polarizing film,

[0317] The first region may have a first slow axis,

[0318] A first orientation angle between the first slow axis and the long-side direction may be 10° or more and 80° or less, or 100° or more and 170° or less.

[0319] In the second disclosed long polarizing film,

[0320] The second region may include an end portion of the phase difference layer in the short-side direction.

[0321] In the second disclosed long polarizing film,

[0322] The first region may include a center of the phase difference layer in the short-side direction.

[0323] In the second disclosed long polarizing film,

[0324] A length of the second region along the short side direction may be greater than or equal to 1 mm and less than or equal to 100 mm.

[0325] In the second disclosed long polarizing film,

[0326] A length of the first region along the short side direction may be 12 times or more of a length of the second region along the short side direction.

[0327] In the long polarizing film disclosed in the second disclosure,

[0328] The in-plane phase difference Re(450) in the first region of the phase difference layer at a wavelength of 450 nm may be smaller than the in-plane phase difference Re(550) in the first region of the phase difference layer at a wavelength of 550 nm.

[0329] The in-plane retardation Re(550) may be smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm.

[0330] The in-plane phase difference Re(550) may be greater than or equal to 130 nm and less than or equal to 153 nm.

[0331] The method for producing a long phase difference film disclosed in the second disclosure comprises the following steps:

[0332] Applying an alignment film-forming composition on a long substrate having a long side direction and a short side direction to form a first coating film;

[0333] irradiating a central region of the first coating film except for the end regions in the short-side direction with polarized light, thereby forming an alignment film having an alignment regulating force in the central region by the first coating film;

[0334] Applying a liquid crystal composition on an intermediate including the substrate and the alignment film to form a second coating film; and

[0335] The second coating film is cured to form a phase difference layer including a cured product of the liquid crystal composition.

[0336] The phase difference layer includes: a first region facing the central region; a second region facing the end region; and a third region facing the substrate on the outside of the alignment film in the short side direction.

[0337] The third region is horizontally oriented.

[0338] In the method for producing a long phase difference film disclosed in the second aspect,

[0339] The third region may have a third slow axis,

[0340] A third orientation angle between the third slow axis and the long-side direction may be greater than or equal to 40° and less than or equal to 140°.

[0341] In the method for producing a long phase difference film disclosed in the second aspect,

[0342] The first region may have a first slow axis,

[0343] A first orientation angle between the first slow axis and the long-side direction may be 10° or more and 80° or less, or 100° or more and 170° or less.

[0344] In the method for producing a long phase difference film disclosed in the second aspect,

[0345] The third region may include an end portion of the phase difference layer in the short-side direction.

[0346] In the method for producing a long phase difference film disclosed in the second aspect,

[0347] The first region may include a center of the phase difference layer in the short-side direction.

[0348] In the method for producing a long phase difference film disclosed in the second aspect,

[0349] The substrate may include a polyester film having a slow axis,

[0350] An angle between the slow axis of the polyester film and the long-side direction may be 40° or more and 140° or less.

[0351] In the method for producing a long phase difference film disclosed in the second aspect,

[0352] A length of the second region along the short side direction may be greater than or equal to 1 mm and less than or equal to 200 mm.

[0353] In the method for producing a long phase difference film disclosed in the second aspect,

[0354] A length of the third region along the short side direction may be greater than or equal to 0.5 mm and less than or equal to 50 mm.

[0355] In the method for producing a long phase difference film disclosed in the second aspect,

[0356] A length of the first region along the short side direction may be 6 times or more of a length of the second region along the short side direction.

[0357] In the method for producing a long phase difference film disclosed in the second aspect,

[0358] The in-plane phase difference Re(450) in the first region of the phase difference layer at a wavelength of 450 nm may be smaller than the in-plane phase difference Re(550) in the first region of the phase difference layer at a wavelength of 550 nm.

[0359] The in-plane retardation Re(550) may be smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm.

[0360] The in-plane phase difference Re(550) may be greater than or equal to 130 nm and less than or equal to 153 nm.

[0361] The method for producing a long optical film disclosed in the second disclosure comprises the following steps:

[0362] The second disclosed long phase difference film is laminated on the long transfer film including the bonding layer; and

[0363] A step of peeling the substrate from the long phase difference film bonded to the bonding layer.

[0364] In the method for producing a long optical film disclosed in the second aspect,

[0365] The long optical film may include the first region of the phase difference layer and a part of the second region.

[0366] The third region and the second region of the phase difference layer except for the portion may remain on the substrate.

[0367] In the method for producing a long optical film disclosed in the second aspect,

[0368] When the long strip phase difference film is stacked on the transferred film, the second region can face the end of the bonding layer in the short side direction, and the third region can be located on the outside of the bonding layer in the short side direction, or face the substrate of the transferred film.

[0369] In the method for producing a long optical film disclosed in the second aspect,

[0370] The transferred film may include a polarizing layer including a polarizer.

[0371] In the drawings attached to this specification, for the sake of convenience of illustration and understanding, the scale and aspect ratio are appropriately changed and exaggerated from the actual situation.

[0372] In this specification, the terms "film", "sheet", and "plate" are not distinguished from each other based on the difference in name only. For example, "phase difference film" cannot be distinguished from a component called phase difference sheet or phase difference plate only by the difference in name. "Polarizing film" cannot be distinguished from a component called polarizing sheet or polarizing plate only by the difference in name.

[0373] "Membrane surface (sheet surface, plate surface)" refers to a surface that is consistent with the plane direction of the membrane (sheet, plate) component as a target when the membrane (sheet, plate) component as a target is observed as a whole and globally. The normal direction of the membrane (sheet, plate) component refers to the normal direction of the membrane surface (sheet surface, plate surface) of the membrane (sheet, plate) component.

[0374] In this specification, when multiple candidates for upper limit values ​​and multiple candidates for lower limit values ​​are listed for a certain parameter, the numerical range of the parameter can also be constructed by combining any candidate for upper limit value and any candidate for lower limit value. As an example, the statement "Parameter B can be greater than A1, greater than A2, or greater than A3. Parameter B can be less than A4, less than A5, or less than A6." is studied. In this example, the numerical range of parameter B can be greater than A1 and less than A4, greater than A1 and less than A5, greater than A1 and less than A6, greater than A2 and less than A4, greater than A2 and less than A5, greater than A2 and less than A6, greater than A3 and less than A4, greater than A3 and less than A5, or greater than A3 and less than A6.

[0375] In order to clarify the relationship between directions among the drawings, arrows with the same reference numerals are used in several drawings to indicate the same first direction D1, second direction D2, and third direction D3. The end side of the arrow is the first side of each direction. The side opposite to the end of the arrow is the second side of each direction. Figure 1 As shown, a symbol formed by placing an x ​​in a circle indicates an arrow pointing toward the back of the drawing along a direction perpendicular to the drawing. A symbol formed by placing a dot in a circle indicates an arrow pointing from the drawing toward the front along a direction perpendicular to the drawing.

[0376] In addition, Figure 1 and Fig.21 The hatching lines indicating the cross section are marked in the figure. In other figures, the hatching lines are omitted. Figure 8 to Figure 11 , Figures 16 to 20 , Figure 23-24 , Figure 26-27 as well as Figure 30 to Figure 34 In FIG. 1 , hatching is indicated to indicate the orientation regulating force of the orientation films 30 and 130 and the orientation state of the phase difference layers 40 and 140. Figure 8 to Figure 11 , Figures 16 to 20 , Figure 23-24 , Figure 26-27 and Figure 30 to Figure 34 The hatched lines in the annotations do not represent sections.

[0377] <<Long strip phase difference film 10, 110>>

[0378] Figure 1 to Figure 3 An example of the long phase difference film 10, 110 of the first and second embodiments described later is shown. Figure 1 and Figure 2 As shown, the long strip phase difference film 10, 110 has a long side direction and a short side direction. The short side direction may also be orthogonal to the long side direction. In the figure, the long side direction of the long strip phase difference film 10, 110 is represented as the second direction D2. The short side direction of the long strip phase difference film 10, 110 is represented as the first direction D1. The long strip phase difference film 10, 110 extends in the first direction D1 and the second direction D2. The normal direction of the long strip phase difference film 10, 110 is represented as the third direction D3. The third direction D3 is the thickness direction of the long strip phase difference film 10, 110. The first direction D1 and the second direction D2 may also be orthogonal to each other. The third direction D3 may also be orthogonal to the first direction D1. The third direction D3 may also be orthogonal to the second direction D2.

[0379] like Figure 3 As shown, the long phase difference film 10, 110 can be handled as a roll 10R, 110R wound on the winding core 12 with the winding axis RA as the center. As a result, the operability of the long phase difference film 10, 110 can be improved. As described later, the long phase difference film 10, 110 can be manufactured by a roll-to-roll manufacturing method. The long phase difference film 10, 110 is excellent in production efficiency and manufacturing cost.

[0380] <<Long film 10 according to the first embodiment>>

[0381] Hereinafter, the long phase difference film 10 of the first embodiment of the present disclosure will be described in detail. Figure 4 As shown, the long strip phase difference film 10 of this embodiment includes a substrate 20 and a phase difference layer 40 overlapping with the substrate 20. The substrate 20 is a long strip. The phase difference layer 40 is a long strip. The phase difference layer 40 includes a first region 41 and a pair of second regions 42. In the illustrated example, the phase difference layer 40 also includes a pair of third regions 43. The first region 41 is located between a pair of second regions 42 in the short side direction. A pair of second regions 42 is located between a pair of third regions 43 in the short side direction. The phase difference layer 40 includes a solidified material of a liquid crystal composition. The second region 42 has a horizontal orientation. The second region 42 has a second slow axis A42, and the second orientation angle θ42 between the second slow axis A42 and the long side direction is greater than 0° and less than 10°, or greater than 170° and less than 180°.

[0382] In this specification, "long strip" means that the object such as a film has a length of more than 5m in the unfolded state, and may have a length of more than 10m, or may have a length of more than 100m. In this specification, "long side direction" means the direction along the longest edge when the object such as a film is unfolded. In this specification, "short side direction" means the direction in which the minimum length is obtained when the object such as a film is unfolded.

[0383] As described later, the long phase difference film 10 is stacked on the long transferred film 50 including the bonding layer 53, and then the substrate 20 is peeled off from the long phase difference film 10 bonded to the bonding layer 53, thereby transferring the phase difference layer 40 to the transferred film 50. At this time, the generation of burrs at the end of the phase difference layer 40 transferred to the transferred film 50 in the short side direction can be suppressed.

[0384] In the example shown in the figure, the long phase difference film 10 further includes an orientation film 30. The orientation film 30 is located between the substrate 20 and the phase difference layer 40 in the third direction D3. The orientation film 30 is long. Hereinafter, each layer of the long phase difference film 10 will be described with reference to the drawings.

[0385] <Phase difference layer 40>

[0386] The phase difference layer 40 includes a cured product of a liquid crystal composition. The liquid crystal composition includes a liquid crystal compound. The liquid crystal composition may be a liquid crystal composition that undergoes a polymerization reaction, i.e., a polymerizable liquid crystal composition. The liquid crystal composition may include a polymerizable liquid crystal compound. The phase difference layer 40 may include a polymerizable liquid crystal compound. The phase difference layer 40 can be obtained in the following manner: a coating film is formed by applying a liquid crystal composition, and then the liquid crystal composition is cured. The orientation state of the liquid crystal compound in the coating film can also be adjusted to horizontal orientation, vertical orientation, inclined orientation, twisted orientation, mixed orientation, etc. By adjusting the orientation of the liquid crystal compound in the coating film, the optical properties of each region in the phase difference layer 40 can be controlled. The orientation of the liquid crystal compound in each region of the phase difference layer 40 will be described later.

[0387] The polymerizable liquid crystal compound is not particularly limited. The polymerizable liquid crystal compound may be a polymerizable liquid crystal compound for forming a layer having birefringence. The polymerizable liquid crystal compound may be appropriately selected according to the desired retardation value, wavelength dispersion, orientation, solubility, etc. of the phase difference layer 40.

[0388] A polymerizable liquid crystal compound is a liquid crystal compound having a polymerizable group. A polymerizable liquid crystal compound contains a polymerizable functional group in the molecule. According to the polymerizable functional group, the liquid crystal compound can be polymerized and fixed, so the orientation stability is excellent and the time-dependent change of the phase difference can be reduced. The polymerizable liquid crystal compound can be a monofunctional liquid crystal compound containing a single polymerizable functional group. The polymerizable liquid crystal compound can also be a multifunctional liquid crystal compound containing two or more polymerizable functional groups. By having two or more polymerizable functional groups, the three-dimensional orientation of the liquid crystal compound is more stable, and the time-dependent change of the phase difference can be further reduced. The polymerizable liquid crystal compound can also be a multifunctional liquid crystal compound containing three polymerizable functional groups. The polymerizable liquid crystal compound can also be a multifunctional liquid crystal compound containing two polymerizable functional groups. The polymerizable functional group can be polymerized by ionizing radiation such as ultraviolet rays and electron beams. The polymerizable functional group can also be polymerized by the action of heat. The polymerizable liquid crystal compound can be a low molecular liquid crystal compound. The polymerizable liquid crystal compound can also be a high molecular liquid crystal compound.

[0389] The polymerizable functional group may be a free radical polymerizable functional group. As a free radical polymerizable functional group, a functional group having at least one addition polymerizable ethylenically unsaturated double bond may be exemplified. As a specific example of the polymerizable functional group, a vinyl group with or without a substituent, an acrylate group (a general term including acryloyl group, methacryloyl group, acryloyloxy group, methacryloyloxy group) and the like may be exemplified.

[0390] The polymerizable functional group may be a cationic polymerizable functional group. Specific examples of the polymerizable functional group include alicyclic ether groups (epoxy, oxetanyl, etc.), cyclic acetal groups, cyclic lactone groups, cyclic iminoether groups, cyclic thioether groups, spirocyclic orthoester groups, and vinyloxy groups.

[0391] The polymerizable liquid crystal composition may include a single polymerizable liquid crystal compound. The polymerizable liquid crystal composition may include two or more polymerizable liquid crystal compounds. By combining two or more polymerizable liquid crystal compounds, the retardation value, wavelength dispersion, orientation, solubility, phase transition temperature, etc. can be adjusted.

[0392] The polymerizable liquid crystal composition may contain one or more polymerizable compounds having no liquid crystal properties, a photopolymerization initiator, a sensitizer, a leveling agent, an antioxidant, a light stabilizer, and other materials.

[0393] The wavelength dispersibility of the phase difference layer 40 may be reverse dispersibility. Reverse dispersibility refers to the wavelength dispersibility in which the in-plane phase difference Re increases from the short wavelength side to the long wavelength side. By making the wavelength dispersibility of the phase difference layer 40 reverse dispersibility, the variation of the in-plane phase difference Re corresponding to the wavelength can be suppressed, thereby achieving excellent color performance. As a polymerizable liquid crystal compound showing reverse dispersibility, a compound represented by the general formula (1) of JP2019-73712 A and a compound represented by the general formula (II) of International Publication No. WO2017 / 043438 can be exemplified.

[0394] The phase difference layer 40 having reverse dispersion properties can have the following optical characteristics regarding the in-plane phase difference in the first region 41 .

[0395] Re(450)<Re(550)

[0396] Re(550)<Re(650)

[0397] Re(450) is the in-plane phase difference in the first region 41 of the phase difference layer 40 at a wavelength of 450 nm. Re(550) is the in-plane phase difference in the first region 41 of the phase difference layer 40 at a wavelength of 550 nm. Re(650) is the in-plane phase difference in the first region 41 of the phase difference layer 40 at a wavelength of 650 nm.

[0398] Re(450), Re(550) and Re(650) in the first region 41 of the phase difference layer 40 are not particularly limited. In the example where the first region 41 of the phase difference layer 40 is set as a λ / 4 phase difference layer, Re(450), Re(550) and Re(650) can be greater than 90nm, greater than 100nm, or greater than 110nm. In the example where the first region 41 of the phase difference layer 40 is set as a λ / 4 phase difference layer, Re(450), Re(550) and Re(650) can be less than 180nm, less than 160nm, or less than 150nm. In the example where the first region 41 of the phase difference layer 40 is set as a λ / 4 phase difference layer, the in-plane phase difference Re(550) can be greater than 130nm, greater than 133nm, or greater than 136nm. In the example where the first region 41 of the phase difference layer 40 is set as a λ / 4 phase difference layer, the in-plane phase difference Re(550) can be less than 153nm, less than 150nm, or less than 147nm. By setting the in-plane phase difference in the first region 41 of the phase difference layer 40 in this way, the first region 41 of the phase difference layer 40 can be used as a circular polarizer in combination with a polarizer.

[0399] The thickness of the phase difference layer 40 along the third direction D3 may be greater than 0.1 μm, greater than 0.5 μm, or greater than 1.5 μm. The thickness of the phase difference layer 40 may be less than 5.0 μm, less than 4.0 μm, or less than 3.0 μm. By setting the thickness of the phase difference layer 40 in this way, the first region 41 of the phase difference layer 40 can be given the above-mentioned in-plane phase difference suitable for being a λ / 4 phase difference layer.

[0400] The thickness of the components constituting the phase difference layer 40 or the long phase difference film 10, and the thickness of the components constituting the transferred film 50 or the long optical film 55 described later, is set as the average value of the measured values ​​at 20 locations in the observation image of the long phase difference film 10, the transferred film 50, etc. obtained by a scanning transmission electron microscope (STEM). The thickness of the components constituting the phase difference layer 140 or the long phase difference film 110 of the second embodiment described later, and the thickness of the components constituting the long optical film 155, is also set as the average value of the measured values ​​at 20 locations in the observation image of the long phase difference film 110, etc. obtained by a scanning transmission electron microscope (STEM).

[0401] In this specification, the in-plane phase difference is set to the average value of 16 measured values. For the 16 measurement locations, an area 1 cm from the outer edge of the measurement sample is used as a blank, and for the area inside the blank, 16 intersections when lines dividing the longitudinal and transverse regions into 5 equal parts are drawn as the center of the measurement. In the case where the measurement sample is a quadrilateral, an area 1 cm from the outer edge of the quadrilateral is used as a blank, and the 16 intersections of lines dividing the area inside the blank into 5 equal parts in the longitudinal and transverse directions are used as the center for measurement, and the average value is calculated to determine the in-plane phase difference of the measurement sample. In the case where the measurement sample is a shape other than a quadrilateral, such as a circle, an ellipse, a triangle, or a pentagon, the square or rectangle with the largest area inscribed in these shapes is determined, and 16 measurements are performed on the square or rectangle using the above method. The in-plane phase difference is measured using an apparatus with the trade name "RETS-100" manufactured by Otsuka Electronics Co., Ltd.

[0402] In this specification, the measurement of the in-plane phase difference Re using RETS-100 is carried out according to the following procedures (A1) to (A4).

[0403] (A1) First, in order to stabilize the light source of RETS-100, leave it for more than 60 minutes after turning on the light source. Then, select the rotating analyzer method and select the θ mode. By selecting this θ mode, the worktable becomes a tilting rotation worktable.

[0404] (A2) Next, the following measurement conditions are input into RETS-100.

[0405] (Measurement conditions)

[0406] Delay measurement range: rotating analyzer method

[0407] ·Measurement spot diameter: φ5mm

[0408] Tilt angle range: 0°

[0409] ·Measurement wavelength range: 400nm~800nm

[0410] Average refractive index of the layer to be measured (for example, in the case of a PET film, N=1.617)

[0411] Thickness: Thickness measured separately using STEM

[0412] (A3) Next, background data is obtained without placing a sample on the device. The device is set as a closed system, and this operation is performed every time the light source is turned on.

[0413] (A4) Then, a sample is set on a stage within the apparatus and measurement is performed.

[0414] When the measurement object of the in-plane phase difference does not have a sufficient size due to reasons such as narrow width, a measurement sample with a sufficient size is prepared under the same conditions as the measurement object, and the in-plane phase difference measured for the measurement sample is used as the in-plane phase difference of the measurement object.

[0415] <Base material 20>

[0416] The substrate 20 supports the phase difference layer 40. In the example shown in the figure, the substrate 20 also supports the orientation film 30. The substrate 20 may also be transparent. In this specification, transparency means that the total light transmittance according to JIS K7361-1:1997 is 50% or more, or 70% or more, or 80% or more, or 90% or more. On the basis of manufacturing the long phase difference film 10 in a roll-to-roll manner, the substrate 20 may also have flexibility that allows it to be wound into a roll.

[0417] As the material of the substrate 20, a resin can be used. The resin substrate 20 has flexibility and is suitable for the roll-to-roll manufacturing method. As the material of the substrate 20, polyester (e.g., polyethylene terephthalate, polyethylene naphthalate), polyurethane, polyimide, polyamide, polycarbonate, polymethyl methacrylate, polymethyl acrylate, etc. can be exemplified.

[0418] The polyester film after biaxial stretching has high transparency and excellent mechanical properties. The biaxially stretched polyester film may have birefringence. As described later, the biaxially stretched polyester film with birefringence can exert an orientation restriction force on the liquid crystal compound contained in the liquid crystal composition used to form the phase difference layer 40. In many resin substrates such as polyester films, the stretching axis becomes the slow axis. In many resin substrates such as polyester films after biaxial stretching, the stretching direction with the largest stretching ratio becomes the slow axis. The resin film is usually stretched in the long side direction and the short side direction orthogonal to the long side direction. The stretching ratio in the short side direction is greater than the stretching ratio in the long side direction.

[0419] In the example shown in the figure, the absolute value of the value obtained by subtracting 90° from the orientation angle θ20 of the slow axis A20 of the biaxially stretched resin substrate 20 with respect to the long side direction (the second direction D2) is smaller than the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42. The orientation angle θ20 may be greater than 40°, greater than 50°, greater than 60°, greater than 70°, or greater than 80°. The orientation angle θ20 may be less than 140°, less than 130°, less than 120°, less than 110°, or less than 100°. The orientation angle θ20 may also be 90°. As Figure 4 As shown in FIG. 1 , the orientation angle is the angle between the slow axis and the long side direction (the second direction D2). The orientation angle is the angle between the slow axis and the reference axis AS in the counterclockwise direction when the axis extending to one side in the long side direction is set as the reference axis AS. The orientation angle is determined to be an angle greater than 0° and less than 180°. Figure 4 In the example shown, the reference axis AS is oriented toward the first side in the second direction D2.

[0420] The base material 20 may contain one or more of a flame retardant, an anti-blocking agent, an antioxidant, a light stabilizer, a tackifier, an antistatic agent, and the like in the binder resin composed of the above-mentioned materials.

[0421] The thickness of the substrate 20 along the third direction D3 may be 10 μm or more, 25 μm or more, or 30 μm or more. The thickness of the substrate 20 may be 1000 μm or less, 200 μm or less, or 150 μm or less.

[0422] The surface of the substrate 20 facing the alignment film 30 and the phase difference layer 40 may not be subjected to surface treatment. As described later, when the phase difference layer 40 is transferred to the transferred film 50, the substrate 20 having the surface not subjected to surface treatment can be easily peeled off from the long phase difference film 10. The surface of the substrate 20 not facing the alignment film 30 and the phase difference layer 40 may be subjected to surface treatment.

[0423] <Orientation film 30>

[0424] like Figure 1 and Figure 2 As shown, the long phase difference film 10 includes an alignment film 30 between a substrate 20 and a phase difference layer 40. The alignment film 30 has an alignment regulating force. The alignment film 30 adjusts the alignment of the phase difference layer 40. The alignment film 30 aligns the liquid crystal compound contained in the phase difference layer 40 in a certain direction.

[0425] The alignment film 30 exerts an alignment restricting force on the liquid crystal compound as described below. The alignment film may be a rubbed alignment film. The rubbed alignment film is given an alignment restricting force by rubbing treatment. The rubbed alignment film can be obtained by coating the alignment film forming composition on the substrate 20 to form a coating film on the substrate 20, and rubbing the coating film using a rubbing roller or the like. The alignment film 30 is more preferably a photo-alignment film. The photo-alignment film is given an alignment restricting force by irradiating polarized light.

[0426] According to the above description, the material of the alignment film is not particularly limited. As the material of the alignment film, a material used as a rubbed alignment film or a material used as a photoalignment film can be used. As the material of the rubbed alignment film, polyvinyl alcohol resin, polyimide resin, polyamide resin, etc. can be exemplified.

[0427] As the material of the photo-alignment film, it is more preferable to use a photo-alignment material that exhibits an orientation restriction force by irradiating polarized light. The material of the photo-alignment film can be any of a photo-dimerization type material and a photo-isomerization type material. The photo-alignment film can be obtained by coating the photo-alignment material on the substrate 20 to form a coating film on the substrate 20, and irradiating the coating film of the photo-alignment material with polarized light to cure the coating film.

[0428] The thickness of the alignment film 30 along the third direction D3 may be 1 nm or more, or 60 nm or more. The thickness of the alignment film 30 may be 1000 nm or less, or 500 nm or less.

[0429] <Optical Characteristics of Phase Difference Layer 40 >

[0430] In the long phase difference film 10 of this embodiment, the phase difference layer 40 includes a first region 41, a pair of second regions 42, and a pair of third regions 43. The first region 41 is located between the pair of second regions 42 in the short-side direction. The pair of second regions 42 is located between the pair of third regions 43 in the short-side direction.

[0431] The first region 41 is cut out from the long retardation film 10 and used as a retardation film 10X (see Figure 3). The first region 41 is given a desired phase difference corresponding to the purpose of the phase difference film 10X. In the first region 41, the liquid crystal compound can be horizontally oriented. In the present specification, horizontal orientation means that the liquid crystal compound is arranged along the sheet surface of the phase difference layer 40 (the phase difference layer 140 in the case of the second embodiment described later). In the first region 41, the liquid crystal compound can be arranged in a manner extending along one direction of the plane defined by the first direction D1 and the second direction D2. In this example, the first region 41 can have in-plane birefringence. The first region 41 can have a first slow axis A41 in the plane. The orientation of the liquid crystal compound in the first region 41 can be adjusted by the orientation limiting force given to the orientation film 30.

[0432] In the illustrated example, the first orientation angle θ41 between the first slow axis A41 of the first region 41 and the long side direction (the second direction D2) is greater than 10° and less than 170°. As an example, the first orientation angle θ41 may be greater than 10°, greater than 20°, or greater than 30°. In this example, the first orientation angle θ41 may be less than 80°, less than 70°, or less than 60°. As another example, the first orientation angle θ41 may be greater than 100°, greater than 110°, or greater than 120°. In this other example, the first orientation angle θ41 may be less than 170°, less than 160°, or less than 150°.

[0433] exist Figure 4 In the example shown, the first region 41 can also be used as a λ / 4 phase difference layer. The first region 41 of the phase difference layer 40 can also be stacked with a polarizing layer having a transmission axis in any direction of the first direction D1 and the second direction D2 to form a circular polarizer. In this example, the first orientation angle θ41 between the first slow axis A41 of the first region 41 and the long side direction (second direction D2) can be greater than 30°, greater than 35°, greater than 40°, or greater than 42°. In this example, the first orientation angle θ41 can be less than 90°, less than 80°, less than 70°, less than 60°, less than 55°, less than 50°, or less than 48°. In this example, the first orientation angle θ41 can also be 45°.

[0434] As another example of using the first region 41 as a λ / 4 phase difference layer, the first orientation angle θ41 may be greater than 125°, greater than 130°, or greater than 132°. In this other example, the first orientation angle θ41 may be less than 145°, less than 140°, or less than 138°. In this other example, the first orientation angle θ41 may also be 135°.

[0435] As already explained, the orientation angle is the size of the angle between the slow axis and the long side direction (the second direction D2). The orientation angle is the size of the angle formed by the slow axis in the counterclockwise direction relative to the reference axis AS when the axis extending to one side in the long side direction is set as the reference axis AS. The orientation angle is determined to be an angle greater than 0° and less than 180°.

[0436] like Figure 4 As shown, in the second region 42, the liquid crystal compound can be horizontally oriented. That is, in the second region 42, the liquid crystal compound can be oriented in the plane of the phase difference layer 40. In other words, in the second region 42, the liquid crystal compound can be arranged in a manner extending along one direction of the plane defined by the first direction D1 and the second direction D2. In this example, the second region 42 can have in-plane birefringence. The second region 42 can have a second slow axis A42 in the plane. The orientation of the liquid crystal compound in the second region 42 can be adjusted by the orientation restriction force given to the orientation film 30. The second orientation angle θ42 between the second slow axis A42 and the long side direction (second direction D2) is 0° or more and less than 10°, or greater than 170° and less than 180°. As an example, the second orientation angle θ42 can be less than 10°, can be less than 8°, can be less than 5°, or can be 0°. The second orientation angle θ42 can be greater than 170°, can be greater than 172°, or can be greater than 175°. The absolute value of the value obtained by subtracting 90° from the second orientation angle θ42 may be greater than the absolute value of the value obtained by subtracting 90° from the first orientation angle θ41. In other words, the absolute value of the value obtained by subtracting 90° from the first orientation angle θ41 may be smaller than the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42.

[0437] like Figure 4As shown, the third region 43 has a third slow axis A43. In the third region 43, the liquid crystal compound can be horizontally oriented. That is, in the third region 43, the liquid crystal compound can be oriented in the plane of the phase difference layer 40. In other words, in the third region 43, the liquid crystal compound can be arranged in a manner extending along one direction of the plane defined by the first direction D1 and the second direction D2. In this example, the third region 43 can have in-plane birefringence. The third region 43 can have a third slow axis A43 in the plane. The absolute value of the value obtained by subtracting 90° from the third orientation angle θ43 between the third slow axis A43 and the long side direction (second direction D2) can be smaller than the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42. In other words, the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42 can be greater than the absolute value of the value obtained by subtracting 90° from the third orientation angle θ43. In the example shown in the figure, the third orientation angle θ43 is greater than 40° and less than 140°. As an example, the third orientation angle θ43 may be greater than 40°, greater than 50°, greater than 60°, greater than 70°, or greater than 80°. The third orientation angle θ43 may be less than 140°, less than 130°, less than 120°, less than 110°, or less than 100°. The third orientation angle θ43 may also be 90°.

[0438] The alignment of the liquid crystal compound in the third region 43 can be adjusted by the alignment regulating force given to the alignment film 30. The alignment of the liquid crystal compound in the third region 43 can be adjusted by the alignment regulating force of the substrate 20 having a slow axis given thereto by stretching.

[0439] The phase difference layer of the long strip phase difference film can be transferred to the transferred film of the long strip for use. In the phase difference layer of the previous long strip phase difference film, the liquid crystal compound is oriented in a certain direction over the entire surface. When the phase difference layer of the previous long strip phase difference film is transferred to the transferred film and the substrate is peeled off from the long strip phase difference film in the long side direction, burrs may be generated at the end of the short side direction (width direction) of the phase difference layer. Phase difference films with burrs attached, optical films manufactured using the phase difference film, and other manufactured products cannot be used as products. In addition, the burrs generated will contaminate the production line for processing the long strip phase difference film. If the production line is contaminated by burrs, burrs will also be attached to the manufactured products manufactured by the production line later. That is, the yield of manufactured products related to the long strip phase difference film will be greatly reduced.

[0440] The inventors of the present disclosure have studied the generation of burrs and found that the generation of burrs is affected by the relationship between the direction in which the substrate is peeled off from the long retardation film and the slow axis of the liquid crystal compound in the retardation layer.

[0441] First, as will be referred to later Fig.26As shown, when the phase difference layer is transferred to the transferred film, the two end portions of the phase difference layer are torn from the other portions and remain on the substrate. That is, only the central portion of the phase difference layer is transferred to the transferred film. Moreover, it is confirmed that when the phase difference layer is torn, the phase difference layer is easily torn along its slow axis. The orientation angle of the slow axis in the long strip phase difference film is usually other than 0°, mostly greater than 10° and less than 80°, or greater than 100° and less than 170°, for example, 45° or 135°. Regarding the phase difference layer with an orientation angle of 45° or 135°, it is easy to produce burrs.

[0442] Based on this phenomenon, it is expected that by aligning the orientation axis along the longitudinal direction, in other words, by increasing the absolute value of the value obtained by subtracting 90° from the orientation angle, the phase difference layer can be stably torn along the longitudinal direction (second direction D2) which is the peeling direction of the substrate.

[0443] Based on such research, in the present embodiment, the orientation of the liquid crystal compound in each region 41, 42, 43 of the phase difference layer 40 is adjusted. In the present embodiment, the second region 42 and the third region 43 are not intentionally cut out from the long phase difference film 10 to be used as the phase difference film 10X. The second region 42 is a region where the phase difference layer 40 is predetermined to be torn when the substrate 20 is peeled off from the long phase difference film 10. The third region 43 is a region intentionally left on the substrate 20 peeled off from the long phase difference film 10.

[0444] First, in the present embodiment, in the phase difference layer 40, in the second region 42, the orientation angle θ42 of the slow axis A42 is greater than 0° and less than 10°, or greater than 170° and less than 180°. Therefore, in the second region 42, the phase difference layer 40 is easily torn along the long side direction (the second direction D2). Thus, the phase difference layer 40 can be torn linearly in the second region 42 along the peeling direction of the substrate 20, that is, the long side direction (the second direction D2). As a result, the burrs generated at the end E40P in the short side direction (the first direction D1) of the phase difference layer 40P transferred to the transferred film 50 can be reduced.

[0445] In addition, according to the discovery made by the inventors of the present application, when the orientation axis of the phase difference layer 40 forms a large angle with respect to the direction in which the phase difference layer 40 is torn, in other words, when the absolute value of the value obtained by subtracting 90° from the orientation angle of the phase difference layer 40 becomes smaller, the phase difference layer 40 is difficult to tear in the above-mentioned tearing direction. Based on such a discovery, in the example shown, in the phase difference layer 40, the absolute value of the value obtained by subtracting 90° from the orientation angle θ41 of the slow axis A41 in the first region 41 is smaller than the absolute value of the value obtained by subtracting 90° from the orientation angle θ42 of the slow axis A42 in the second region 42. Therefore, the first region 41 is more difficult to tear in the long side direction than the second region 42. As a result, when the substrate 20 is peeled off from the long strip phase difference film 10 in the long side direction (the second direction D2), the tearing of the substrate 20 in the second region 42 in a linear shape along the peeling direction is promoted. In addition, in the example shown, the orientation angle θ42 of the slow axis A42 in the second region 42 is greater than 0° and less than 10°, or greater than 170° and less than 180°, whereas the orientation angle θ41 of the slow axis A41 in the first region 41 is greater than 30° and less than 150°. Therefore, compared with the second region 42, the tearing of the first region 41 in the long side direction becomes significantly difficult. Thus, when the substrate 20 is peeled off from the long strip phase difference film 10, the tearing of the substrate 20 in the second region 42 in a linear shape along the peeling direction is effectively promoted.

[0446] In the example shown, in the phase difference layer 40, the absolute value of the value obtained by subtracting 90° from the orientation angle θ43 of the slow axis A43 in the third region 43 is smaller than the absolute value of the value obtained by subtracting 90° from the orientation angle θ42 of the slow axis A42 in the second region 42. Therefore, the third region 43 is more difficult to tear in the long side direction than the second region 42. As a result, when the substrate 20 is peeled off from the long strip phase difference film 10, the tearing of the phase difference layer 40 in the second region 42 is promoted. In addition, in the example shown in the figure, the orientation angle θ42 of the slow axis A42 in the second region 42 is greater than 0° and less than 10°, or greater than 170° and less than 180°, while the orientation angle θ43 of the slow axis A43 in the third region 43 is greater than 40° and less than 140°. Therefore, compared with the second region 42, the tearing of the third region 43 in the long side direction becomes significantly difficult. Thus, when the substrate 20 is peeled off from the long strip phase difference film 10, the tearing of the substrate 20 in the second region 42 in a linear manner along the peeling direction is effectively promoted. In addition, the second region 42 is sandwiched by the first region 41 and the third region 43, which are more difficult to tear in the long side direction than the second region 42, thereby enabling the second region 42 to be torn in a linear manner with higher reliability.

[0447] like Figure 2 and Figure 4As shown, in the illustrated long phase difference film 10, the first region 41 of the phase difference layer 40 includes the center position of the long phase difference film 10 in the short side direction (first direction D1). The first region 41 of the phase difference layer 40 includes the center position of the phase difference layer 40 in the short side direction (first direction D1). In addition, the third region 43 includes the end E40 of the phase difference layer 40 in the short side direction (first direction D1). Therefore, the area of ​​the first region 41 intended to be used as the phase difference film 10X can be largely ensured. On the other hand, the area of ​​the third region 43 intentionally remaining on the substrate 20 can be reduced. As a result, the yield rate when manufacturing a product from the long phase difference film 10 can be substantially improved.

[0448] In the example shown in the figure, the first region 41 and the second region 42 are adjacent to each other in the first direction D1. The second region 42 and the third region 43 are adjacent to each other in the first direction D1. Therefore, the yield rate when manufacturing a product from the long phase difference film 10 can be sufficiently improved.

[0449] From the viewpoint of improving the yield rate when manufacturing products from the long phase difference film and realizing stable transfer of the phase difference layer 40, the size of each region 41, 42, 43 can be determined as follows. The length L42 of the second region 42 along the short side direction (first direction D1) (see Figure 4 ) can be 1 mm or more, 5 mm or more, or 10 mm or more. The length L42 of the second region 42 along the short side direction (first direction D1) can be 200 mm or less, 100 mm or less, or 50 mm or less. The length L43 of the third region 43 along the short side direction (first direction D1) (see Figure 4 ) can be 0.5 mm or more, 1 mm or more, or 1.5 mm or more. The length L43 of the third region 43 along the short side direction (first direction D1) can be 50 mm or less, 40 mm or less, or 30 mm or less. The length L41 of the first region 41 along the short side direction (first direction D1) (refer to Figure 2 ) may be the length L42 of the second region 42 along the short side direction (the first direction D1) (see Figure 4 ) more than 6 times, more than 12 times, or more than 20 times. The length L41 of the first region 41 along the short side direction (first direction D1) (refer to Figure 2 ) may also be the length L42 of the second region 42 along the short side direction (first direction D1) (see Figure 4 ) is less than 250 times.

[0450] The illustrated long strip phase difference film 10 includes an orientation film 30 located between the substrate 20 and the first region 41 and the second region 42 of the phase difference layer 40. The first region 41 and the second region 42 are in contact with the orientation film 30. The orientation film 30 is not located between the third region 43 and the substrate 20 in the third direction D3. The third region 43 is in contact with the substrate 20. According to this example, the orientation of the liquid crystal compound in the first region 41 and the second region 42 can be adjusted by the orientation film 30. The orientation of the liquid crystal compound in the third region 43 can be adjusted by the substrate 20. For example, the orientation of the liquid crystal compound in the third region 43 can be controlled by the surface properties of the substrate 20, or the substrate orientation angle θ20 related to the substrate slow axis A20 of the substrate 20. That is, the orientation of the three regions 41, 42, and 43 of the phase difference layer 40 can be controlled with a higher degree of freedom.

[0451] In the illustrated example, the orientation film 30 includes a central region 31 and a pair of end regions 32. The central region 31 faces the first region 41 of the phase difference layer 40 in the third direction D3. The central region 31 includes the center of the long phase difference film 10 in the short side direction (the first direction D1). The central region 31 includes the center of the orientation film 30 in the short side direction (the first direction D1). The central region 31 has an orientation limiting force. In the first region 41 of the phase difference layer 40, the liquid crystal compound is oriented in a manner extending along a direction corresponding to the orientation limiting force of the central region 31. Each end region 32 faces the second region 42 of the phase difference layer 40 in the third direction D3. The end region 32 includes an end E30 in the short side direction (the first direction D1).

[0452] Each end region 32 has an orientation restricting force. In the second region 42 of the phase difference layer 40, the liquid crystal compound is oriented so as to extend along a direction corresponding to the orientation restricting force of the end region 32 facing it. In the illustrated example, the central region 31 also has an orientation restricting force. In the first region 41 of the phase difference layer 40, the liquid crystal compound is oriented so as to extend along a direction corresponding to the orientation restricting force of the central region 31 facing it. In addition, in the illustrated example, the end region 32 may also be formed so that the orientation direction of the liquid crystal compound regulated by its orientation restricting force is different from the orientation direction of the liquid crystal compound regulated by the orientation restricting force of the central region 31. In this case, in the second region 42 of the phase difference layer 40, the liquid crystal compound is oriented so as to extend in a direction different from the direction in which the liquid crystal compound extends in the first region 41.

[0453] In this example, the alignment film 30 may be a photo-alignment film. According to the photo-alignment film, the alignment regulating force in each region of the alignment film 30 can be easily adjusted independently of other regions.

[0454] In this example, the substrate 20 may also include a biaxially stretched polyester film. The substrate orientation angle θ20 associated with the substrate slow axis A20 of the biaxially stretched polyester film is usually 40° or more and 140° or less. By forming the third region 43 of the phase difference layer 40 on the biaxially stretched polyester film, the third orientation angle θ43 associated with the third slow axis A43 of the third region 43 becomes 40° or more and 140° or less. That is, the third region 43 that is difficult to tear in the long side direction can be easily formed.

[0455] The width W20 of the substrate 20 along the short side direction (first direction D1) (see Figure 1 and Figure 2 ) may be 1000 mm or more, 1150 mm or more, or 1200 mm or more. The width W20 of the substrate 20 along the short side direction (first direction D1) may be 2000 mm or less, 1800 mm or less, or 1600 mm or less. The width W30 of the orientation film 30 along the short side direction (first direction D1) (see Figure 1 and Figure 2 ) can be 950 mm or more, 1100 mm or more, or 1150 mm or more. The width W30 of the orientation film 30 along the short side direction (first direction D1) can be 1950 mm or less, 1750 mm or less, or 1550 mm or less. The width W40 of the phase difference layer 40 along the short side direction (first direction D1) (refer to Figure 1 and Figure 2 ) can be greater than 970 mm, can be greater than 1120 mm, or can be greater than 1170 mm. The width W40 of the phase difference layer 40 along the short side direction (the first direction D1) can be less than 1970 mm, can be less than 1770 mm, or can be less than 1570 mm. The width W40 of the phase difference layer 40 along the short side direction (the first direction D1) can be greater than the width W30 of the orientation film 30 along the short side direction (the first direction D1). The width W40 of the phase difference layer 40 along the short side direction (the first direction D1) can be less than the width W30 of the orientation film 30 along the short side direction (the first direction D1). The length of the long strip phase difference film 10 along the long side direction (the second direction D2) can be greater than 5 m, can be greater than 10 m, or can be greater than 100 m. The length of the long retardation film 10 along the longitudinal direction (the second direction D2) may be 10000 m or less, 8000 m or less, or 6000 m or less.

[0456] <Method for producing the long phase difference film 10>

[0457] Next, an example of a method for producing the long phase difference film 10 will be described. In the following description, the long phase difference film 10 is produced by a roll-to-roll production method. Figure 1 to Figure 4 The long phase difference film 10 is shown.

[0458] Figure 5 An example of a method for manufacturing a long phase difference film 10 and an example of a manufacturing device 70 for the long phase difference film 10 are shown. The manufacturing device 70 includes: a supply core 71, which is wound with a long substrate 20; a recovery core 72, which recovers the manufactured long phase difference film 10; and a conveying roller 73, which guides the substrate 20 or the long phase difference film 10 from the supply core 71 to the recovery core 72. The manufacturing device 70 includes a first supply device 76, a first drying device 77, and a first curing device 78 as a device for forming an orientation film 30 on the substrate 20. The manufacturing device 70 includes a second supply device 81, a second drying device 82, and a second curing device 83 as a device for forming a phase difference layer 40.

[0459] First, the substrate 20 wound on the supply core 71 is supplied. The substrate 20 conveyed by the conveying roller 73 passes through a position facing the first supply device 76. The first supply device 76 applies the alignment film forming composition 34 containing the photo-alignment material on one surface of the substrate 20. Figure 6 As shown, a first coating film 35 of an alignment film composition 34 is formed on one surface of a substrate 20 .

[0460] The substrate 20 conveyed by the conveying roller 73 passes through a position facing the first drying device 77. The first drying device 77 dries the first coating film 35 of the alignment film forming composition 34. As an example, the first drying device 77 supplies a high-temperature dry gas to the first coating film 35 of the alignment film forming composition 34.

[0461] The substrate 20 conveyed by the conveying roller 73 passes through a position facing the first curing device 78. The first curing device 78 has a structure corresponding to the curing process of the first coating film 35 of the alignment film forming composition 34. Figure 5 As shown, the first curing device 78 may include a first exposure device 78A, a first mask 78B, a second exposure device 78C, and a second mask 78D. The first mask 78B is located between the first exposure device 78A and the substrate 20. The second mask 78D is located between the second exposure device 78C and the substrate 20. In the first curing device 78, the first exposure device 78A and the second exposure device 78C are arranged in the traveling direction of the substrate 20. In the first curing device 78, the first mask 78B and the second mask 78D are arranged in the traveling direction of the substrate 20. In the example shown in the figure, the second exposure device 78C and the second mask 78D are arranged on the downstream side of the first exposure device 78A and the first mask 78B in the traveling direction of the substrate 20.

[0462] In the example shown in the figure, the first exposure device 78A emits polarized light toward the first coating film 35 of the alignment film forming composition 34. Figure 7 As shown, the first mask 78B includes a first transmission region 78B1 and a pair of first light shielding regions 78B2. The first transmission region 78B1 is located between the pair of first light shielding regions 78B2 in the short side direction D1 of the substrate 20 facing the first mask 78B. The polarized light emitted from the first exposure device 78A passes through the first transmission region 78B1. The polarized light emitted from the first exposure device 78A is shielded by the first light shielding region 78B2. In addition, as shown in FIG. Figure 8 As shown, the second mask 78D includes a pair of second transmission regions 78D1 and a second light shielding region 78D2. The second light shielding region 78D2 is located between the pair of second transmission regions 78D1 in the short side direction D1 of the substrate 20 facing the second mask 78D. The polarized light emitted from the second exposure device 78C passes through the second transmission region 78D1. The polarized light emitted from the second exposure device 78C is shielded in the second light shielding region 78D2.

[0463] like Figure 7 As shown in FIG. 1 , the first coating film 35 of the composition for forming an alignment film 34 is irradiated with polarized light in the area facing the first transmission area 78B1. Figure 8 As shown, the first coating film 35 is irradiated with polarized light in the area facing the second transmission area 78D1. By exposure using polarized light, the first coating film 35 is given an orientation regulating force corresponding to the polarized light. In the example shown in the figure, the first coating film 35 is irradiated with polarized light having different polarization states in the area facing the first transmission area 78B1 and the area facing the second transmission area 78D1. Therefore, the first coating film 35 exhibits orientation regulating forces in different orientation directions in the area facing the first transmission area 78B1 and the area facing the second transmission area 78D1. In the example shown in the figure, the area facing the first transmission area 78B1 becomes the central area 31 of the orientation film 30. In addition, the area facing the second transmission area 78D1 becomes the end area 32 of the orientation film 30. With respect to the end area 32, the orientation direction of the liquid crystal compound adjusted by its orientation regulating force is different from the orientation direction of the liquid crystal compound adjusted by the orientation regulating force of the central area 31.

[0464] In the example shown in the figure, the second exposure device 78C and the second mask 78D are arranged on the downstream side of the first exposure device 78A and the first mask 78B in the direction of travel of the substrate 20, but the present invention is not limited thereto. The second exposure device 78C and the second mask 78D may also be arranged on the upstream side of the first exposure device 78A and the first mask 78B in the direction of travel of the substrate 20. In other words, the central region 31 of the alignment film 30 may be irradiated with polarized light by the first exposure device 78A before the end region 32, or the end region 32 may be irradiated with polarized light by the second exposure device 78C before the central region 31.

[0465] Through the above operations, such as Fig. 9 As shown, an intermediate 15 including a substrate 20 and an alignment film 30 is obtained. In the intermediate 15, the alignment film 30 includes a central region 31 and an end region 32. The alignment film 30 has alignment regulating forces in different alignment directions in the central region 31 and the end region 32.

[0466] exist Figure 8 , Fig. 9 , described later Figure 10-11 , Fig.19 , Fig.23 and Fig.26 In FIG. 1 , hatching corresponding to the orientation regulating force of the orientation film 30 and the orientation state of the phase difference layer 40 is indicated. Figure 8 , Fig. 9 , Figure 10-11 , Fig.19 , Fig.23 and Fig.26 The hatched lines in the diagram do not represent cross sections. Figure 8 , Fig. 9 , Figure 10-11 , Fig.19 , Fig.23 and Fig.26 In the retardation layer 40 , no pattern is given to a region where the liquid crystal compound does not have a regular orientation.

[0467] like Figure 5 As shown in FIG. 1 , the intermediate body 15 is transported by the transport roller 73 and passes through a position facing the second supply device 81. The second supply device 81 applies a liquid crystal composition 44 containing a liquid crystal compound on one surface of the intermediate body 15. Fig.10 As shown, the second coating film 45 is formed on one surface of the substrate 20 and on the alignment film 30. The second coating film 45 is not cured, and the liquid crystal compound in the second coating film 45 can change its arrangement.

[0468] This case is unique

[0469] In the region of the second coating film 45 facing the end region 32 of the alignment film 30 in the third direction D3, the liquid crystal compound is aligned so as to extend in a certain direction by the alignment restraining force of the end region 32. The second region 42 of the phase difference layer 40 is formed in the region of the second coating film 45 facing the end region 32 of the alignment film 30 in the third direction D3. Figure 4 In the production of the long retardation film 10 shown, the liquid crystal compound in the second region 42 can be aligned so that the second alignment angle θ42 is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

[0470] In the region of the second coating film 45 facing the central region 31 of the alignment film 30 in the third direction D3, the liquid crystal compound is aligned so as to extend in a certain direction by the alignment restraining force of the central region 31. The first region 41 of the phase difference layer 40 is formed in the region of the second coating film 45 facing the central region 31 of the alignment film 30 in the third direction D3. Figure 4 In the production of the long retardation film 10 shown, the liquid crystal compound in the first region 41 can be aligned so that the absolute value of the value obtained by subtracting 90° from the first alignment angle θ41 is smaller than the absolute value of the value obtained by subtracting 90° from the second alignment angle θ42 .

[0471] exist Fig.10 In the example shown, the second coating film 45 extends to the outside of the orientation film 30 in the short-side direction (first direction D1). In this specification, the "outside" in the short-side direction refers to the side opposite to the center in the short-side direction. In this specification, the "inside" in the short-side direction refers to the center side in the short-side direction. The end region of the second coating film 45 in the short-side direction (first direction D1) faces the substrate 20 in the third direction D3. The end region of the second coating film 45 in the short-side direction (first direction D1) is located on the substrate 20. In the end region of the second coating film 45 in the short-side direction (first direction D1), the liquid crystal compound is subjected to an orientation restricting force from the substrate 20. The resin substrate generally exhibits an orientation restricting force in the direction with the highest stretching ratio. The stretched resin substrate generally exhibits an orientation restricting force in a direction parallel to its slow axis. The stretched polyester substrate exhibits an orientation restricting force in a direction parallel to the slow axis. The third region 43 of the phase difference layer 40 is formed in the region of the second coating film 45 that is in contact with the substrate 20 in the third direction D3. Figure 4 In the production of the long retardation film 10 shown, the liquid crystal compound in the third region 43 can be aligned so that the absolute value of the value obtained by subtracting 90° from the third orientation angle θ43 is smaller than the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42.

[0472] The intermediate product 15 conveyed by the conveying rollers 73 passes through a position facing the second drying device 82. The second drying device 82 dries the second coating film 45 of the liquid crystal composition 44. As an example, the second drying device 82 supplies a high-temperature dry gas to the second coating film 45 of the liquid crystal composition 44.

[0473] The intermediate body 15 conveyed by the conveying roller 73 passes through a position facing the second curing device 83. The second curing device 83 has a structure corresponding to the curing process of the second coating film 45 of the liquid crystal composition 44. Fig.11 As shown, the second curing device 83 may include an exposure device 83A. In the example shown in the figure, the exposure device 83A emits ionizing radiation to the second coating film 45 of the liquid crystal composition 44. The second coating film 45 of the liquid crystal composition 44 is cured by irradiating the ionizing radiation from the second curing device 83. In the curing process, the second coating film 45 is cured while the liquid crystal compound maintains the arrangement. In each of the first region 41, the second region 42 and the third region 43 of the phase difference layer 40, the liquid crystal compound is horizontally oriented. In addition, in the example shown in the figure, the liquid crystal compound is arranged in the second region 42 in such a manner that the second orientation angle θ42 is greater than 0° and less than 10°, or greater than 170° and less than 180°. In addition, the liquid crystal compound is arranged in the first region 41 in such a manner that the absolute value of the value obtained by subtracting 90° from the first orientation angle θ41 is less than the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42. Furthermore, the liquid crystal compound is arranged in the third region 43 so that the absolute value of the value obtained by subtracting 90° from the third orientation angle θ43 is smaller than the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42 .

[0474] The long strip phase difference film 10 is manufactured as described above. The manufactured long strip phase difference film 10 includes a long side direction and a short side direction. The long strip phase difference film 10 includes a substrate 20, an orientation film 30 and a phase difference layer 40. The substrate 20, the orientation film 30 and the phase difference layer 40 each include a long side direction parallel to the long side direction of the long strip phase difference film 10. The substrate 20, the orientation film 30 and the phase difference layer 40 each include a short side direction parallel to the short side direction of the long strip phase difference film 10.

[0475] <<Elongated phase difference film 110 of the second embodiment>>

[0476] Next, the long phase difference film 110 according to the second embodiment of the present disclosure will be described in detail. Figure 4 Compared with the long phase difference film 10 shown, Fig.12 The difference between the long phase difference film 110 shown in the figure is that the phase difference layer 140 includes a non-oriented region. In addition, the orientation film 130 includes a region that is not given an orientation regulating force. Figure 4The long strip phase difference film 10 shown is substantially the same. Fig.12 In the second embodiment shown, Figure 4 The same parts of the long phase difference film 10 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0477] <<Long strip phase difference film 110>>

[0478] like Fig.12 As shown, the long strip phase difference film 110 of this embodiment includes a substrate 120 and a phase difference layer 140 overlapping the substrate 120. The substrate 120 is a long strip. The phase difference layer 140 is a long strip. The phase difference layer 140 includes a first region 141, a pair of second regions 142, and a pair of third regions 143. The first region 141 is located between a pair of second regions 142 in the short side direction. A pair of second regions 142 is located between a pair of third regions 143 in the short side direction. The phase difference layer 140 includes a solidified material of a liquid crystal composition. The second region 142 can be a non-oriented region. The third region 143 has a horizontal orientation.

[0479] As described later, the long strip phase difference film 110 is stacked on the long strip transferred film 50 including the bonding layer 53, and then the substrate 120 is peeled off from the long strip phase difference film 110 bonded to the bonding layer 53, thereby transferring the phase difference layer 140P to the transferred film 50. At this time, the generation of burrs at the end E140P in the short side direction of the phase difference layer 140P transferred to the transferred film 50 can be suppressed.

[0480] In the example shown in the figure, the long phase difference film 110 further includes an alignment film 130. The alignment film 130 is located between the substrate 120 and the phase difference layer 140 in the third direction D3. The alignment film 130 is long. Hereinafter, each layer of the long phase difference film 110 will be described with reference to the drawings.

[0481] <Phase difference layer 140>

[0482] The phase difference layer 140 contains a solidified liquid crystal composition. The liquid crystal composition may be the same liquid crystal composition as the liquid crystal composition contained in the phase difference layer 40 of the first embodiment. In the case where the phase difference layer 140 contains a polymerizable liquid crystal compound, the polymerizable liquid crystal compound may be appropriately selected according to the desired delay value, wavelength dispersion, orientation, solubility, etc. of the phase difference layer 40. The phase difference layer 140 can be obtained by applying a liquid crystal composition to form a coating film, and then curing the liquid crystal composition. The orientation state of the liquid crystal compound in the coating film can also be adjusted to horizontal orientation, vertical orientation, inclined orientation, twisted orientation, mixed orientation, etc. By adjusting the orientation of the liquid crystal compound in the coating film, the optical properties of each region in the phase difference layer 140 can be controlled. The orientation of the liquid crystal compound in each region of the phase difference layer 140 will be described later.

[0483] The wavelength dispersion of the retardation layer 140 may be reverse dispersion. In this case, the retardation layer 40 may have the following optical characteristics regarding the in-plane retardation in the first region 141 .

[0484] Re(450)<Re(550)

[0485] Re(550)<Re(650)

[0486] Re(450) is the in-plane phase difference in the first region 141 of the phase difference layer 140 at a wavelength of 450 nm. Re(550) is the in-plane phase difference in the first region 141 of the phase difference layer 140 at a wavelength of 550 nm. Re(650) is the in-plane phase difference in the first region 141 of the phase difference layer 140 at a wavelength of 650 nm.

[0487] Re(450), Re(550) and Re(650) in the first region 141 of the phase difference layer 140 are not particularly limited. In the example where the first region 141 of the phase difference layer 140 is set as a λ / 4 phase difference layer, Re(450), Re(550) and Re(650) can be greater than 90nm, greater than 100nm, or greater than 110nm. In the example where the first region 141 of the phase difference layer 140 is set as a λ / 4 phase difference layer, Re(450), Re(550) and Re(650) can be less than 180nm, less than 160nm, or less than 150nm. In the example where the first region 141 of the phase difference layer 140 is set as a λ / 4 phase difference layer, the in-plane phase difference Re(550) can be greater than 130nm, greater than 133nm, or greater than 136nm. In the example where the first region 141 of the phase difference layer 140 is set as a λ / 4 phase difference layer, the in-plane phase difference Re(550) can be less than 153nm, less than 150nm, or less than 147nm. By setting the in-plane phase difference in the first region 141 of the phase difference layer 140 in this way, the first region 141 of the phase difference layer 140 can be used as a circular polarizer in combination with a polarizer.

[0488] The thickness of the phase difference layer 140 along the third direction D3 may be greater than 0.1 μm, greater than 0.5 μm, or greater than 1.5 μm. The thickness of the phase difference layer 140 may be less than 5.0 μm, less than 4.0 μm, or less than 3.0 μm. By setting the thickness of the phase difference layer 140 in this way, the first region 141 of the phase difference layer 140 can be given the above-mentioned in-plane phase difference suitable for being a λ / 4 phase difference layer.

[0489] <Base material 120>

[0490] The substrate 120 supports the phase difference layer 140. In the example shown in the figure, the substrate 120 also supports the orientation film 130. The substrate 120 may be transparent. In the case where the long phase difference film 110 is manufactured in a roll-to-roll manner, the substrate 120 may have flexibility so as to be wound into a roll.

[0491] The material of the substrate 120 may be the same material as that of the substrate 20 in the first embodiment. The thickness of the substrate 120 along the third direction D3 may be set to the same range as that of the thickness of the substrate 20 in the first embodiment.

[0492] As the substrate 120, similarly to the substrate 20 of the first embodiment, a resin substrate such as a polyester film formed by biaxial stretching can be used. As described later, the biaxially stretched polyester film having birefringence can exert an orientation restricting force on the liquid crystal compound contained in the liquid crystal composition used to form the phase difference layer 140. The orientation angle θ120 formed by the slow axis A120 of the biaxially stretched resin substrate 120 with respect to the long side direction (the second direction D2) can be 40° or more, 50° or more, 60° or more, 70° or more, or 80° or more. The orientation angle θ20 can be less than 140°, less than 130°, less than 120°, less than 110°, or less than 100°. The orientation angle θ120 can also be 90°. As Fig.12 As shown in FIG. 1 , the orientation angle is the angle between the slow axis and the long side direction (the second direction D2). The orientation angle is the angle between the slow axis and the reference axis AS in the counterclockwise direction when the axis extending to one side in the long side direction is set as the reference axis AS. The orientation angle is determined to be an angle greater than 0° and less than 180°. Fig.12 In the example shown, the reference axis AS is oriented toward the first side in the second direction D2.

[0493] The surface of the substrate 120 facing the alignment film 130 and the phase difference layer 140 may not be subjected to surface treatment. As described later, when the phase difference layer 140 is transferred to the transferred film 50, the substrate 120 having the surface not subjected to surface treatment can be easily peeled off from the long phase difference film 110. The surface of the substrate 120 not facing the alignment film 130 and the phase difference layer 140 may also be subjected to surface treatment.

[0494] <Orientation film 130>

[0495] like Figure 1 and Figure 2 As shown, the long phase difference film 110 includes an alignment film 130 between a substrate 120 and a phase difference layer 140. The alignment film 130 has an alignment regulating force. The alignment film 130 adjusts the alignment of the phase difference layer 140. The alignment film 130 aligns the liquid crystal compound contained in the phase difference layer 140 in a certain direction.

[0496] The alignment film 130 exerts an alignment restriction force on the liquid crystal compound as described below. As in the case of the first embodiment, the alignment film may also be a rubbed alignment film. The rubbed alignment film can be obtained by applying the alignment film forming composition on the substrate 120 to form a coating film on the substrate 120, and rubbing the coating film using a rubbing roller or the like. As in the case of the first embodiment, the alignment film 130 is more preferably a photoalignment film.

[0497] As described above, the material of the alignment film is not particularly limited. As in the case of the first embodiment, the material of the alignment film may be a material used for a rubbed alignment film or a material used for a photo-alignment film.

[0498] As in the first embodiment, a photo-alignment material is more preferably used as the material of the photo-alignment film. The photo-alignment film can be obtained by coating the photo-alignment material on the substrate 120 to form a coating film on the substrate 120, and irradiating the coating film of the photo-alignment material with polarized light to cure the coating film.

[0499] The thickness of the alignment film 130 along the third direction D3 can be set to the same range as the thickness of the alignment film 30 along the third direction D3 of the first embodiment.

[0500] <Optical Characteristics of the Phase Difference Layer 140 >

[0501] In the long phase difference film 110 of this embodiment, the phase difference layer 140 includes a first region 141, a pair of second regions 142, and a pair of third regions 143. The first region 141 is located between the pair of second regions 142 in the short side direction. The pair of second regions 142 is located between the pair of third regions 143 in the short side direction.

[0502] As in the case of the first embodiment, the first region 141 is cut out from the long retardation film 110 and used as the retardation film 110X (see Figure 3 ). The first region 141 is given a desired phase difference corresponding to the purpose of the phase difference film 110X. As in the case of the first embodiment, in the first region 141, the liquid crystal compound can be horizontally oriented. In the first region 141, the liquid crystal compound can be arranged in a manner extending along one direction of the plane defined by the first direction D1 and the second direction D2. In this example, the first region 141 can have in-plane birefringence. The first region 141 can have a first slow axis A141 in the plane. The orientation of the liquid crystal compound in the first region 141 can be adjusted by the orientation limiting force given to the orientation film 130.

[0503] As an example, the first orientation angle θ141 between the first slow axis A141 of the first region 141 and the long side direction (the second direction D2) may be greater than 10°, greater than 20°, or greater than 30°. In this example, the first orientation angle θ141 may be less than 80°, less than 70°, or less than 60°.

[0504] As another example, the first orientation angle θ141 may be greater than 100°, greater than 110°, or greater than 120°. In this other example, the first orientation angle θ141 may be less than 170°, less than 160°, or less than 150°.

[0505] exist Fig.12 In the example shown, the first region 141 can also be used as a λ / 4 phase difference layer. The first region 141 of the phase difference layer 140 can be stacked with a polarizing layer having a transmission axis in any one of the first direction D1 and the second direction D2 to form a circular polarizer. In this example, the first orientation angle θ141 between the first slow axis A141 of the first region 141 and the long side direction (second direction D2) can be greater than 35°, greater than 40°, or greater than 42°. In this example, the first orientation angle θ141 can be less than 55°, less than 50°, or less than 48°. In this example, the first orientation angle θ41 can also be 45°.

[0506] As another example of using the first region 141 as a λ / 4 phase difference layer, the first orientation angle θ141 may be greater than 125°, greater than 130°, or greater than 132°. In this other example, the first orientation angle θ141 may be less than 145°, less than 140°, or less than 138°. In this other example, the first orientation angle θ141 may also be 135°.

[0507] like Fig.12 As shown, in the second region 142, the orientation of the polymerizable liquid crystal compound contained in the cured product of the polymerizable liquid crystal composition is not restricted and is irregular. As an example, by forming the second region 142 on the orientation film 30 to which the orientation restriction force is not given, the non-polarized light of the second region 142 can be achieved. As another example, by forming the second region 142 on an optically isotropic substrate, for example, by forming the second region 142 on an unstretched substrate, the non-orientation of the second region 142 can be achieved.

[0508] like Fig.12As shown, the third region 143 has a third slow axis A143. In the third region 143, the liquid crystal compound can be horizontally oriented. As described above, horizontal orientation means that the liquid crystal compound is arranged along the sheet surface of the phase difference layer 140. In the third region 143, the liquid crystal compound can be arranged in a manner extending along one direction of the plane defined by the first direction D1 and the second direction D2. In this example, the third region 143 can have in-plane birefringence. The third region 143 can have a third slow axis A143 in the plane. The third orientation angle θ143 between the third slow axis A143 and the long side direction (second direction D2) can be 40° or more, 50° or more, 60° or more, 70° or more, or 80° or more. The third orientation angle θ43 can be less than 140°, less than 130°, less than 120°, less than 110°, or less than 100°. The third orientation angle θ143 can also be 90°.

[0509] The alignment of the liquid crystal compound in the third region 143 can be regulated by the alignment regulating force given to the alignment film 130. The alignment of the liquid crystal compound in the third region 143 can be regulated by the alignment regulating force of the substrate 120 to which the slow axis is given by stretching.

[0510] As described above, by reducing the orientation angle of the phase difference layer, the phase difference layer can be stably torn along the peeling direction of the substrate, that is, the long side direction (the second direction D2). However, the orientation angle of the long strip phase difference film is determined according to the purpose of the phase difference film obtained from the long strip phase difference film. Therefore, it is also possible to consider only giving a different orientation to the region where the phase difference layer is torn than to other regions. On the other hand, the manufacturing process is required to be simplified.

[0511] Based on such research, in the present embodiment, the orientation of the liquid crystal compound in each region 141, 142, 143 of the phase difference layer 140 is adjusted. In the present embodiment, the second region 142 and the third region 143 are not intentionally cut out from the long phase difference film 110 and used as the phase difference film 110X. The second region 142 is a region where the tearing of the phase difference layer 140 is predetermined when the substrate 120 is peeled off from the long phase difference film 110. The third region 143 is a region intentionally left on the substrate 120 peeled off from the long phase difference film 110.

[0512] First, in the present embodiment, the phase difference layer 140 is non-oriented in the second region 142. That is, the arrangement of the liquid crystal compound is irregular. Therefore, in the second region 142, there is no direction in which the phase difference layer 140 is easily torn. Thus, the phase difference layer 140 can be torn linearly in the second region 142 along the peeling direction of the substrate 120, that is, the long side direction (the second direction D2).

[0513] However, it was confirmed that the adhesion of the phase difference layer is reduced in the non-oriented area. Moreover, if the non-oriented area where the adhesion is reduced extends to the end of the phase difference layer in the first direction D1, the tearing of the phase difference layer cannot be stably implemented. Specifically, when the phase difference layer is to be torn, the phase difference layer is sometimes not torn in a straight line at the predetermined position. In addition, there is also a situation where it is not the phase difference layer that is torn, but the entire area of ​​the phase difference layer in the first direction D1 is peeled off from the substrate. For example, if the phase difference layer is separated from the substrate to its end area in the first direction D1 and transferred, as in the comparative example described later, burrs caused by rupture of the end area may sometimes occur, thereby contaminating the production line. In the case of these phenomena, even if burrs caused by poor tearing of the phase difference layer are not generated, the manufactured product cannot be used as a product.

[0514] On the other hand, in this embodiment, the liquid crystal compound in the third region 143 of the phase difference layer 140 is horizontally oriented. Compared with the non-oriented second region 142, the third region 143 in which the liquid crystal compound is horizontally oriented has stronger adhesion to the substrate 120. Therefore, the adhesion of the third region 143 to the adjacent layer is improved. As a result, when the substrate 120 is peeled off from the long phase difference film 110, a straight tear in the second region 142 along the peeling direction of the substrate 120 is obtained.

[0515] By the above operation, it is possible to reduce burrs generated at the end E140P in the short-side direction (the first direction D1 ) of the phase difference layer 140P transferred onto the transferred film 50 .

[0516] From the viewpoint of reducing the burrs generated at the end E140P of the phase difference layer 140P after transfer, it is effective to set the range of the third orientation angle θ143. When the slow axis A140 of the phase difference layer 140 forms a large angle with respect to the direction in which the phase difference layer 140 is torn, the phase difference layer 140 has a stronger adhesion with respect to tearing. From this point of view, the third orientation angle θ143 may also be greater than 40° and less than 140°. Furthermore, the third orientation angle θ143 may be greater than 50°, greater than 60°, greater than 70°, or greater than 80°. The third orientation angle θ143 may be less than 130°, less than 120°, less than 110°, or 100°. The third orientation angle θ143 may also be 90°.

[0517] The first orientation angle θ141 of the first region 141 with respect to the first slow axis A141 is subject to constraints corresponding to the purpose of the long strip phase difference film 110. The third orientation angle θ143 can be determined for the purpose of reducing the generation of burrs. It is effective to make the third orientation angle θ143 closer to 90° than the first orientation angle θ141. Thus, when the first orientation angle θ141 is set to be greater than 10° and less than 80° or greater than 100° and less than 170°, or when the first orientation angle θ141 is set to be greater than 35° and less than 55° or greater than 125° and less than 145°, the burrs generated at the end E140P in the short side direction (first direction D1) of the phase difference layer 140P transferred to the transferred film 50 can be reduced.

[0518] like Figure 2 and Fig.12 As shown, in the illustrated strip phase difference film 110, the first region 141 of the phase difference layer 140 includes the center position in the short side direction (first direction D1) of the strip phase difference film 110. The first region 141 of the phase difference layer 140 includes the center position in the short side direction (first direction D1) of the phase difference layer 140. In addition, the third region 143 includes the end E140 of the phase difference layer 140 in the short side direction (first direction D1). Therefore, the area of ​​the first region 141 that is intentionally used as the phase difference film 110X can be largely ensured. On the other hand, the area of ​​the third region 143 that is intentionally left on the substrate 120 can be reduced. As a result, the yield rate when manufacturing a product from the strip phase difference film 110 can be fully improved.

[0519] In the example shown in the figure, the first region 141 and the second region 142 are adjacent to each other in the first direction D1. The second region 142 and the third region 143 are adjacent to each other in the first direction D1. Therefore, the yield rate when manufacturing a product from the long phase difference film 110 can be sufficiently improved.

[0520] From the viewpoint of improving the yield rate when manufacturing products from the long retardation film and realizing stable transfer of the retardation layer 140, the sizes of the regions 141, 142, and 143 can be determined as follows. The length L142 of the second region 142 along the short side direction (first direction D1) (see Fig.12 ) can be 1 mm or more, 5 mm or more, or 10 mm or more. The length L142 of the second region 142 along the short side direction (first direction D1) can be 200 mm or less, 100 mm or less, or 50 mm or less. The length L143 of the third region 143 along the short side direction (first direction D1) (see Fig.12) can be 0.5 mm or more, 1 mm or more, or 1.5 mm or more. The length L143 of the third region 143 along the short side direction (first direction D1) can be 50 mm or less, 40 mm or less, or 30 mm or less. The length L141 of the first region 141 along the short side direction (first direction D1) (see Figure 2 ) may be the length L142 of the second region 142 along the short side direction (first direction D1) (see Fig.12 ) more than 6 times, more than 12 times, or more than 20 times. The length L141 of the first region 141 along the short side direction (first direction D1) (refer to Figure 2 ) may also be the length L142 of the second region 142 along the short side direction (first direction D1) (see Fig.12 ) is less than 250 times.

[0521] The illustrated long strip phase difference film 110 includes an orientation film 130 located between the substrate 120 and the first region 141 and the second region 142 of the phase difference layer 140. The first region 141 and the second region 142 are in contact with the orientation film 130. The orientation film 130 is not located between the third region 143 and the substrate 120 in the third direction D3. The third region 143 is in contact with the substrate 120. According to this example, the orientation of the liquid crystal compound in the first region 141 and the second region 142 can be adjusted by the orientation film 130. The orientation of the liquid crystal compound in the third region 143 can be adjusted by the substrate 120. For example, the orientation of the liquid crystal compound in the third region 143 can be controlled by the surface properties of the substrate 120, or the substrate orientation angle θ120 of the substrate 120 related to the substrate slow axis A120. That is, the orientation of the three regions 141, 142, and 143 of the phase difference layer 40 can be controlled with a higher degree of freedom.

[0522] In the illustrated example, the orientation film 130 includes a central region 131 and a pair of end regions 132. The central region 131 faces the first region 141 of the phase difference layer 140 in the third direction D3. The central region 131 includes the center of the long phase difference film 110 in the short side direction (the first direction D1). The central region 131 includes the center of the orientation film 130 in the short side direction (the first direction D1). The central region 131 has an orientation limiting force. In the first region 141 of the phase difference layer 140, the liquid crystal compound is oriented in a manner extending along a direction corresponding to the orientation limiting force of the central region 131. Each end region 132 faces the second region 142 of the phase difference layer 140 in the third direction D3. The end region 132 includes an end E130 in the short side direction (the first direction D1). The end region 132 does not have an orientation limiting force. In the second region 142 of the phase difference layer 140, the liquid crystal compound is irregularly dispersed.

[0523] In this example, the alignment film 130 may be a photo-alignment film. According to the photo-alignment film, the alignment regulating force in each region of the alignment film 130 can be easily adjusted independently of other regions.

[0524] In this example, the substrate 120 may include a biaxially stretched polyester film. The substrate orientation angle θ120 of the biaxially stretched polyester film related to the substrate slow axis A120 is usually 40° or more and 140° or less. By forming the third region 143 of the phase difference layer 140 on the biaxially stretched polyester film, the third orientation angle θ143 of the third region 143 related to the third slow axis A143 becomes 40° or more and 140° or less. That is, the third region 143 with extremely excellent adhesion to the substrate 120 can be easily formed.

[0525] The width W120 of the substrate 120 along the short side direction (first direction D1) (see Figure 1 and Figure 2 ) can be set to the same range as the width W20 of the substrate 20 along the short side direction (first direction D1) of the first embodiment. The width W130 of the alignment film 130 along the short side direction (first direction D1) (see Figure 1 and Figure 2 ) can also be set to the same range as the width W30 of the alignment film 30 along the short side direction (first direction D1) of the first embodiment. The width W140 of the phase difference layer 140 along the short side direction (first direction D1) (see Figure 1 and Figure 2 ) can also be set to the same range as the width W40 of the phase difference layer 40 along the short side direction (first direction D1) of the first embodiment. The width W140 of the phase difference layer 140 along the short side direction (first direction D1) can be greater than the width W130 of the orientation film 130 along the short side direction (first direction D1). The length of the long phase difference film 110 along the long side direction (second direction D2) can also be set to the same range as the length of the long phase difference film 10 along the long side direction (second direction D2) of the first embodiment.

[0526] <Method for manufacturing the long phase difference film 110>

[0527] Next, an example of a method for producing the long-length phase difference film 110 will be described. In the following description, the long-length phase difference film 110 is produced by a roll-to-roll production method. Figure 1 to Figure 3 and Fig.12 The long strip phase difference film 110 is shown.

[0528] Fig.13An example of a method for manufacturing the long-length retardation film 110 and an example of an apparatus 170 for manufacturing the long-length retardation film 110 are shown. Figure 5 Compared with the manufacturing device 70 shown in FIG. 1 , the manufacturing device 170 is different in that the first curing device 178 does not include the second exposure device 78C and the second mask 78. Figure 5 The manufacturing apparatus 70 shown is substantially the same. Fig.13 In the manufacturing apparatus 170 of the second embodiment shown in FIG. Figure 5 The same parts of the manufacturing apparatus 70 shown are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0529] like Fig.13 As shown, the manufacturing device 170 includes a supply core 71, a recovery core 72, and a conveying roller 73. The manufacturing device 170 includes a first supply device 76, a first drying device 77, and a first curing device 178 as a device for forming the alignment film 130 on the substrate 120. The manufacturing device 170 includes a second supply device 81, a second drying device 82, and a second curing device 83 as a device for forming the phase difference layer 140.

[0530] First, the substrate 120 supplied from the supply core 71 is transported by the transport roller 73 and passes through a position facing the first supply device 76. Fig.14 As shown, the first supply device 76 forms a first coating film 35 of the alignment film-forming composition 34 on one surface of the substrate 120 .

[0531] The substrate 120 transported by the transport roller 73 passes through a position facing the first drying device 77. The first drying device 77 dries the first coating film 35 of the alignment film-forming composition 34.

[0532] The substrate 120 conveyed by the conveying roller 73 passes through a position facing the first curing device 78. Fig.15 As shown, the first curing device 178 may include a first exposure device 78A and a mask 78B. In the example shown in the figure, the first exposure device 78A emits polarized light toward the first coating film 35 of the alignment film forming composition 34. The polarized light passes through the transmission area 78B1 of the mask 78B. The polarized light emitted from the first exposure device 78A is shielded by the light shielding area 78B2 of the mask 78B.

[0533] like Fig.15As shown, the first coating film 35 of the composition for forming an alignment film 34 is irradiated with polarized light in the area facing the transmission area 78B1. By exposure using polarized light, the first coating film 35 is given an alignment regulating force corresponding to the polarized light. The exposed area of ​​the first coating film 35 becomes the central area 131 of the alignment film 130. The first coating film 35 of the composition for forming an alignment film 34 is not irradiated with polarized light in the area facing the light shielding area 78B2. The unexposed area of ​​the first coating film 35 becomes the end area 132 of the alignment film 130. The end area 132 does not have an alignment regulating force.

[0534] Through the above steps, if Fig.16 As shown, an intermediate 115 including a substrate 120 and an alignment film 130 is obtained. In the intermediate 115, the alignment film 130 includes a central region 131 and end regions 132. The alignment film 130 has an alignment regulating force only in the central region 131.

[0535] exist Fig.16 , described later Figure 17-18 , Fig. 20 , Fig.24 and Fig. 27 In FIG. 1 , hatching lines corresponding to the orientation regulating force of the orientation film 130 and the orientation state of the phase difference layer 140 are marked. Fig.16 , Figure 17-18 , Fig. 20 , Fig.24 and Fig. 27 The hatched lines in the diagram do not represent cross sections. Fig.16 , Figure 17-18 , Fig. 20 , Fig.24 and Fig. 27 In the above, no pattern is added to the region of the alignment film 130 where no alignment regulating force is generated or the region of the phase difference layer 140 where the liquid crystal compound does not have a regular alignment.

[0536] like Fig.13 As shown, the intermediate body 115 is transported by the transport roller 73 and passes through a position facing the second supply device 81. The second supply device 81 applies a liquid crystal composition 44 containing a liquid crystal compound on one surface of the intermediate body 115. Fig.17 As shown, the second coating film 45 is formed on one surface of the substrate 120 and on the alignment film 130. The second coating film 45 is not cured, and the liquid crystal compound in the second coating film 45 can change its arrangement.

[0537] In the region of the second coating film 45 facing the central region 131 of the alignment film 130 in the third direction D3, the liquid crystal compound is aligned in a manner extending in a certain direction by the alignment restraining force of the central region 131. In the region of the second coating film 45 facing the central region 131 of the alignment film 130 in the third direction D3, the first region 141 of the phase difference layer 140 is formed. Fig.12 In the production of the long retardation film 110 shown, the liquid crystal compound in the first region 141 is aligned so that the first alignment angle θ141 becomes 45°.

[0538] The end region 132 of the orientation film 130 has no orientation restriction force. In the region of the second coating film 45 facing the end region 132 of the orientation film 130 in the third direction D3, the arrangement of the liquid crystal compound is not restricted by the orientation film 130. In the region facing the end region 132, the liquid crystal compound has no regularity in arrangement. The second region 142 of the phase difference layer 140 is formed in the region of the second coating film 45 facing the end region 132 of the orientation film 130 in the third direction D3. Fig.12 In the production of the long phase difference film 110 shown, the second region 142 is non-oriented.

[0539] like Fig.17 As shown, the second coating film 45 extends to the outside of the orientation film 130 in the short side direction (the first direction D1). The end region of the second coating film 45 in the short side direction (the first direction D1) faces the substrate 120 in the third direction D3. The end region of the second coating film 45 in the short side direction (the first direction D1) is located on the substrate 120. In the end region of the second coating film 45 in the short side direction (the first direction D1), the liquid crystal compound receives an orientation restricting force from the substrate 120. The third region 143 of the phase difference layer 140 is formed in the region of the second coating film 45 that contacts the substrate 120 in the third direction D3. Fig.12 In the production of the long retardation film 110 shown, the liquid crystal compound in the third region 143 can be aligned so that the third alignment angle θ143 becomes 40° or more and 140° or less.

[0540] The intermediate product 115 conveyed by the conveying rollers 73 passes through a position facing the second drying device 82. The second drying device 82 dries the second coating film 45 of the liquid crystal composition 44.

[0541] The intermediate 115 conveyed by the conveying roller 73 passes through a position facing the second curing device 83. The second coating film 45 of the liquid crystal composition 44 is cured by irradiating ionizing radiation from the second curing device 83. During the curing process, the second coating film 45 is cured while the liquid crystal compound is maintained in an aligned state. In the first region 141 and the third region 143 of the phase difference layer 140, the liquid crystal compound is horizontally aligned. In the second region 142, the liquid crystal compound is irregularly aligned.

[0542] By processing as above, a long strip phase difference film 110 is manufactured. The manufactured long strip phase difference film 110 includes a long side direction and a short side direction. The long strip phase difference film 110 includes a substrate 120, an orientation film 130 and a phase difference layer 140. The substrate 120, the orientation film 130 and the phase difference layer 140 each include a long side direction parallel to the long side direction of the long strip phase difference film 110. The substrate 120, the orientation film 130 and the phase difference layer 140 each include a short side direction parallel to the short side direction of the long strip phase difference film 110.

[0543] <<Elongated optical films 55 and 155 and elongated polarizing films 60 and 160 of the first and second embodiments>>

[0544] Next, the long optical film 55 and the long polarizing film 60 according to the first embodiment, and the long optical film 155 and the long polarizing film 160 according to the second embodiment will be described in detail.

[0545] The long optical films 55 and 155 are manufactured by using the above-mentioned long retardation films 10 and 110. The long optical films 55 and 155 include the long transferred films 50 and 150 and the long retardation layers 40P and 140P transferred from the long retardation films 10 and 110. Fig.19 This is a cross-sectional view showing an example of the long optical film 55 according to the first embodiment. Fig. 20 This is a cross-sectional view showing an example of the long film 155 according to the second embodiment. Fig.19 and Fig. 20 The long optical films 55 and 155 shown are formed by Figures 1 to 18 The phase difference layer 40 of the long phase difference film 10, 110 shown is transferred to Fig.21 The transfer film 50 shown is manufactured.

[0546] Fig.21 The transfer film 50 shown includes a long polarizing layer 52. The polarizing layer 52 transmits polarized light components vibrating in a specific direction and blocks polarized light components vibrating in a direction orthogonal to the specific direction. Fig.19 and Fig. 20The long optical films 55 and 155 shown function as circular polarizers by combining the polarizing layer 52 with the first regions 41 and 141 of the retardation layers 40P and 140P functioning as λ / 4 retardation layers.

[0547] Strictly speaking, the long polarizing films 60 and 160 function as circular polarizers for light of any wavelength, and generally function as elliptically polarizers for light of other wavelengths. A polarizing plate that functions as a circular polarizer for light of any wavelength between 400 nm and 800 nm is called a circular polarizer.

[0548] Reference Fig.21 , Fig.19 and Fig. 20 The specific example shown will explain the transferred film 50 and the long optical films 55 and 155 in further detail.

[0549] The transferred film 50 and the long strip optical films 55 and 155 are long strips and have a long side direction and a short side direction. The layers constituting the transferred film 50 and the long strip optical films 55 and 155 are also long strips and have a long side direction and a short side direction. The long side direction of the transferred film 50 is parallel to the long side direction of the components of the transferred film 50. The short side direction of the transferred film 50 is parallel to the short side direction of the components of the transferred film 50. The long side direction of the long strip optical films 55 and 155 is parallel to the long side direction of the components of the long strip optical films 55 and 155. The short side direction of the long strip optical films 55 and 155 is parallel to the short side direction of the components of the long strip optical films 55 and 155.

[0550] The transferred film 50 includes a base material 51 and a bonding layer 53 . Fig.21 The transferred film 50 shown includes a substrate 51, a polarizing layer 52 and a bonding layer 53 in sequence in the third direction D3. The substrate 51 of the transferred film 50 is not particularly limited. The substrate 51 of the transferred film 50 may be the same as the substrate 20, 120 of the above-mentioned long phase difference film 10, 110. From the perspective of a manufacturing method that can be applied in a roll-to-roll manner, the material of the substrate 51 may be a resin. As materials for the substrate 51, polyester films, polycarbonate films, cycloolefin polymer films, triacetyl cellulose films and acrylic films can be exemplified. The thickness of the substrate 51 along the third direction D3 can be set to the same range as the thickness of the substrate 20, 120 of the long phase difference film 10, 110 along the third direction D3.

[0551] There is no particular limitation on the bonding layer 53. The bonding layer 53 may include an adhesive material or a bonding material. There is no particular limitation on the material of the bonding layer 53. The material of the bonding layer 53 may also be a PVA-based adhesive material or an acrylic-based adhesive material. The thickness of the bonding layer 53 along the third direction D3 may be greater than 1 μm, greater than 1.5 μm, or greater than 2 μm. The thickness of the bonding layer 53 may be less than 200 μm, less than 160 μm, or less than 120 μm.

[0552] The polarizing layer 52 may include an absorption-type polarizer. The absorption-type polarizer has an absorption axis and a transmission axis. The absorption-type polarizer transmits the linear polarized light component vibrating in a direction parallel to the transmission axis, and absorbs the linear polarized light component vibrating in a direction parallel to the absorption axis. The polarizing layer 52 may also include a reflection-type polarizer. The reflection-type polarizer has a reflection axis and a transmission axis. The reflection-type polarizer transmits the linear polarized light component vibrating in a direction parallel to the transmission axis, and reflects the linear polarized light component vibrating in a direction parallel to the reflection axis.

[0553] The polarizer of the polarizing layer 52 can be a polyvinyl alcohol film, a polyvinyl formal film, a polyvinyl acetal film, or an ethylene-vinyl acetate copolymer saponified film that is dyed and stretched using iodine or the like. The polarizer of the polarizing layer 52 can also be a coated polarizer coated with a dichroic guest-host material. The polarizer of the polarizing layer 52 can also be a multilayer thin-film polarizing plate. The thickness of the polarizing layer 52 along the third direction D3 can be greater than 0.5 μm, can be greater than 1 μm, or can be greater than 2 μm. The thickness of the polarizing layer 52 can be less than 150 μm, can be less than 120 μm, or can be less than 80 μm.

[0554] The end E53 on the short side direction (first direction D1) of the bonding layer 53 can face the second region 42, 142 of the phase difference layer 40, 140 contained in the long strip phase difference film 10, 110. Thus, when the phase difference layer 40, 140 is transferred, the phase difference layer 40, 140 can be torn in the second region 42, 142. The second region 42 of the phase difference layer 40 of the first embodiment is an area that is easily torn along the long side direction (second direction D2) of the phase difference layer 40. In addition, the second region 142 of the phase difference layer 140 of the second embodiment is non-oriented. When the phase difference layer 140 is torn in the second region 142, the influence of the phase difference layer on the tearing direction can be reduced.

[0555] Since the end E53 of the bonding layer 53 faces the second region 42, 142, the width of each layer along the short side direction (first direction D1) can be set as follows. Fig.21) may be smaller than the width W40, W140 of the phase difference layer 40, 140 included in the long phase difference film 10, 110 along the short side direction (first direction D1). The width W53 of the bonding layer 53 along the short side direction (first direction D1) (refer to Fig.21 ) may be smaller than the total length L42+L41+L42, L142+L141+L142 of the first region 41, 141 and the pair of second regions 42, 142 of the phase difference layer 40, 140 included in the long phase difference film 10, 110 along the short side direction (first direction D1). The width W53 of the bonding layer 53 along the short side direction (first direction D1) (refer to Fig.21 ) may be greater than the length L41 , L141 of the first region 41 , 141 of the phase difference layer 40 , 140 included in the long phase difference film 10 , 110 along the short side direction (the first direction D1 ).

[0556] The width W53 of the bonding layer 53 along the short side direction (first direction D1) may be 940 mm or more, 1090 mm or more, or 1140 mm or more. The width W53 of the bonding layer 53 along the short side direction (first direction D1) may be 1940 mm or less, 1740 mm or less, or 1540 mm or less.

[0557] The width W51 of the substrate 51 along the short side direction (first direction D1) (see Fig.21 ) may be greater than the width W53 of the bonding layer 53 along the short side direction (the first direction D1). The width W51 of the substrate 51 along the short side direction (the first direction D1) may be set to the same range as the widths W20 and W120 of the substrates 20 and 120 along the short side direction (the first direction D1).

[0558] The width W52 of the polarizing layer 52 along the short side direction (first direction D1) may also be greater than the width W53 of the bonding layer 53 along the short side direction (first direction D1). The width W52 of the polarizing layer 52 along the short side direction (first direction D1) may also be less than the width W51 of the substrate 51 along the short side direction (first direction D1). By setting the width of the polarizing layer 52 in this way, the variation in the thickness of the transferred film 50 in the area where the bonding layer 53 is provided can be suppressed. Thus, the phase difference layers 40P and 140P of the long phase difference films 10 and 110 can be stably transferred to the transferred film 50.

[0559] The length of the transferred film 50 along the longitudinal direction (the second direction D2 ) can be set to the same range as the length of the long retardation films 10 , 110 along the longitudinal direction (the second direction D2 ).

[0560] like Fig.19 and Fig. 20 As shown, the long optical film 55, 155 includes a transferred film 50 and a phase difference layer 40P, 140P. The phase difference layer 40P, 140P is a part of the phase difference layer 40, 140 included in the long phase difference film 10, 110. The phase difference layer 40P, 140P of the long optical film 55, 155 includes a first region 41, 141 of the phase difference layer 40, 140 included in the long phase difference film 10, 110 and a part (first part) 42A, 142A of each of a pair of second regions 42, 142. The phase difference layer 40P, 140P of the long optical film 55, 155 does not include the remaining portion (second portion) 42B, 142B other than the portion 42A, 142A of the pair of second regions 42, 142 of the phase difference layer 40, 140 included in the long phase difference film 10, 110, and the pair of third regions 43, 143. Fig.26 and Fig. 27 As shown, the inner portion of each second region 42, 142 of the phase difference layer 40, 140 in the short-side direction (first direction D1) is transferred to the transfer film 50. The outer portion of each second region 42, 142 of the phase difference layer 40, 140 in the short-side direction (first direction D1) remains on the substrate 20, 120 together with the third region 43, 143. The inner portion of the second region 42, 142 is the portion 42A, 142A of the second region 42, 142. The outer portion of the second region 42, 142 is the remaining portion 42B, 142B of the second region 42, 142.

[0561] exist Fig.19 and Fig. 20In the example shown, the long optical film 55, 155 includes a substrate 51, a polarizing layer 52, a bonding layer 53, a phase difference layer 40P, 140P and an orientation film 30P, 130P in order along the third direction D3. The orientation film 30P, 130P is a part of the orientation film 30, 130 included in the long phase difference film 10, 110. The orientation film 30P, 130P is a part of the orientation film 30, 130 included in the long phase difference film 10, 110 that faces the phase difference layer 40P, 140P in the third direction D3. The orientation film 30P, 130P of the long optical film 55, 155 includes a part (first part) 32A, 132A of the central region 31, 131 and a pair of end regions 32, 132 of the orientation film 30, 130 included in the long phase difference film 10, 110. The oriented film 30P, 130P of the long optical film 55, 155 does not include the remaining portion (second portion) 32B, 132B of each of the pair of end regions 32, 132 of the oriented film 30, 130 contained in the long phase difference film 10, 110 except for the portion 32A, 132A. The inner portion of each end region 32, 132 of the oriented film 30, 130 in the short side direction (first direction D1) is transferred to the transferred film 50. The outer portion of each end region 32, 132 of the oriented film 30, 130 in the short side direction (first direction D1) remains on the substrate 20, 120. The inner portion of the end region 32, 132 is the portion 32A, 132A of the end region 32, 132. The outer portion of the end region 32, 132 is the remaining portion 32B, 132B of the end region 32, 132.

[0562] Fig.19 and Fig. 20 The long optical films 55 and 155 shown function as long polarizing films 60 and 160. In this application, the phase difference layer 40P and 140P function as a λ / 4 phase difference layer. The angle between the first slow axis A41 and A141 in the first region 41 and 141 of the phase difference layer 40P and 140 and the transmission axis of the polarizing layer 52 can be greater than 35°, greater than 40°, or greater than 42°. The angle between the first slow axis A41 and A141 of the phase difference layer 40P and 140P and the transmission axis of the polarizing layer 52 can be less than 55°, less than 50°, or less than 48°. The angle between the first slow axis A41 and A141 of the phase difference layer 40P and 140P and the transmission axis of the polarizing layer 52 can be 45°.

[0563] An example of a method for manufacturing the long optical film 55, 155 is described. In the following description, the long optical film 55, 155 is manufactured by a roll-to-roll manufacturing method. Fig.19 and Fig. 20The long polarizing films 60 and 160 shown are examples of the long optical films 55 and 155 .

[0564] Fig. 22 An example of a method for manufacturing a long optical film 55, 155 and an example of a manufacturing device 90 for the long optical film 55, 155 are shown. The manufacturing device 90 includes a first supply core 91, a second supply core 92, a first recovery core 93, a second recovery core 94 and a conveying roller 95. The first supply core 91 sends out a long phase difference film 10, 110. The long phase difference film 10, 110 can also be manufactured in advance and wound around the first supply core 91. Instead of the example shown in the figure, the long phase difference film 10, 110 can also be continuously manufactured and sent to the conveying roller 95. The second supply core 92 sends out a long transfer film 50. The long transfer film 50 can also be manufactured in advance and wound around the second supply core 92. Instead of the example shown in the figure, the long transfer film 50 can also be continuously manufactured and sent to the conveying roller 95. The first recovery core 93 recovers the manufactured long optical film 55, 155. The second collection core 94 collects the long substrates 20 and 120. The conveying rollers 95 include a first conveying roller 95A and a second conveying roller 95B.

[0565] First, the long phase difference film 10, 110 is supplied from the first supply core 91 to the first conveying roller 95A. In parallel with the supply of the long phase difference film 10, 110, the transfer film 50 is supplied from the second supply core 92 to the first conveying roller 95A. Fig.23 and Fig.24 As shown, the long phase difference film 10, 110 and the transferred film 50 are supplied between a pair of first conveying rollers 95A. The long phase difference film 10, 110 and the transferred film 50 are stacked between a pair of first conveying rollers 95A. The phase difference layer 40 of the long phase difference film 10, 110 contacts the bonding layer 53 of the transferred film 50. A pair of first conveying rollers 95A presses the long phase difference film 10, 110 and the transferred film 50 toward each other. As a result, the phase difference layer 40, 140 is bonded to the bonding layer 53.

[0566] like Fig.23 and Fig.24As shown, both ends E53 of the bonding layer 53 face the second regions 42 and 142 of the phase difference layer 40 and 140 in the third direction D3. That is, the bonding layer 53 is bonded to the first region 41 and 141 of the phase difference layer 40 and 140, and the inner portion of the pair of second regions 42 and 142 in the first direction D1, that is, a portion 42A and 142A. The bonding layer 53 does not face the outer portion of the pair of third regions 43 and 143 of the phase difference layer 40 and 140, and the pair of second regions 42 and 142 in the first direction D1, that is, the remaining portion 42B and 142B other than the portion 42A and 142A in the third direction D3. When the long phase difference film 10 , 110 is stacked on the transferred film 50 , the third region 43 , 143 and the remaining portion 42B, 142B of the second region 42 , 142 are located outside the bonding layer 53 in the short-side direction (first direction D1 ).

[0567] Then, if Fig. 22 As shown in FIG. 1 , the stacked long phase difference films 10, 110 and the transferred film 50 are fed toward between the second conveying rollers 95B. Fig. 22 and Fig.25 As shown, after the long retardation film 10, 110 passes between the pair of second conveying rollers 95B, the substrate 20, 120 is peeled from the long retardation film 10, 110. In the roll-to-roll manufacturing method, the substrate 20, 120 is peeled along the second direction D2 which is the longitudinal direction.

[0568] like Fig.26 and Fig. 27 As shown, the portion of the phase difference layer 40, 140 bonded to the bonding layer 53 is maintained as the phase difference layer 40P, 140P bonded to the bonding layer 53 and is transferred to the transfer film 50. The portion of the orientation film 30, 130 facing the phase difference layer 40P, 140P in the third direction D3 is also transferred to the transfer film 50 as the orientation film 30P, 130P. Fig.26 and Fig. 27 As shown, the phase difference layer 40, 140 is torn at a position in the second region 42, 142 and at a position facing the end E53 of the bonding layer 53 in the third direction D3. Similarly, the orientation film 30, 130 is torn at a position in the end region 32, 132 and at a position facing the end E53 of the bonding layer 53 in the third direction D3.

[0569] That is, the first region 41, 141 and the second region 42, 142 of the phase difference layer 40, 140, a portion 42A, 142A of the inner portion in the first direction D1 are transferred to the transfer film 50 as the phase difference layer 40P, 140P. The third region 43, 143 and the remaining portion 42B, 142B of the second region 42, 142 of the phase difference layer 40, 140, which are the outer portions in the first direction D1, are kept in close contact with the substrate 20, 120. The central region 31, 131 and the portion 32A, 132A of the end region 32, 132 of the orientation film 30, 130, which are the inner portions in the first direction D1, are transferred to the transfer film 50 as the orientation film 30P, 130P. The remaining portions 32B and 132B of the edge regions 32 and 132 of the alignment films 30 and 130 , which are the outer portions in the first direction D1 , remain bonded to the substrates 20 and 120 .

[0570] As described above, the long polarizing films 60 and 160 are continuously manufactured by transferring the phase difference layers 40P and 140P and the orientation films 30P and 130P from the long phase difference films 10 and 110 to the transferred film 50. The manufactured long polarizing films 60 and 160 are recovered to the first recovery core 93. The substrates 20 and 120 peeled from the orientation films 30P and 130P and the phase difference layers 40P and 140P are recovered to the second recovery core 94.

[0571] From the viewpoint of improving the yield of the optical films 55X, 155X and the polarizing films 60X, 160X described later and realizing stable transfer of the phase difference layers 40, 140, the lengths L42A, L142A of the second regions (parts) 42A, 142A included in the phase difference layers 40P, 140P along the short side direction (first direction D1) can be determined as follows (refer to Fig.19 and Fig. 20 ). The length L42A, L142A can be greater than 1 mm, greater than 2 mm, or greater than 5 mm. The length L42A, L142A can be less than 100 mm, less than 50 mm, or less than 25 mm. From the same point of view, the length L32A, L132A (refer to the length L42A, L142A) of the end region 32, 132 (i.e., a portion 32A, 132A) included in the orientation film 30P, 130P along the short side direction (first direction D1) can also be determined as follows: Fig.19 and Fig. 20). The length L32A and L132A can be greater than 1 mm, greater than 2 mm, or greater than 5 mm. The length L32A and L132A can be less than 100 mm, less than 50 mm, or less than 25 mm. The length L41 and L141 of the first region 41 and 141 included in the phase difference layer 40P and 140P along the short side direction (first direction D1) can be greater than 12 times, greater than 24 times, or greater than 40 times the length L42A and L142A of the second region (part) 42A and 142A included in the phase difference layer 40P and 140P along the short side direction (first direction D1). The length L41A; L141A can also be less than 500 times the length L42A and L142A.

[0572] The transferred film 50, the long optical films 55, 155 and the long polarizing films 60, 160 can be similarly formed as the long phase difference films 10, 110 described above. Figure 3 As shown, the roll 50R, 55R, 60R, 50R, 155R, 160R is wound around the winding core 12 with the winding axis RA as the center and is processed. As a result, it is easy to process the long film 50, 55, 60; 50, 155, 160. The long film 50, 55, 60; 50, 155, 160 can be manufactured by a roll-to-roll manufacturing method. The long film 50, 55, 60; 50, 155, 160 is excellent in production efficiency and manufacturing cost. By cutting the long optical film 55, 155 or the long polarizing film 60, 160 into the desired size, each optical film 55X, 155X or each polarizing film 60X, 160X can be obtained. According to this example, as needed, a single optical film 55X, 155X or a single polarizing film 60X, 160X having various sizes can be obtained from the long optical film 55, 155 or the long polarizing film 60, 160. The optical film 55X, 155X or the polarizing film 60X, 160X having various sizes can be provided in a timely manner.

[0573] The optical film 55X, 155X or the polarizing film 60X, 160X obtained from the long optical film 55, 155 or the long polarizing film 60, 160 can also be applied to the display device 100. Fig.28 In the example shown, the optical films 55X, 155X and the polarizing films 60X, 160X are arranged to overlap with the display element 101 as an image forming device. In this example, the optical films 55X, 155X and the polarizing films 60X, 160X have a reflection suppression function to suppress the reflection of external light such as ambient light on the surface of the display device 100. The reflection suppression function can improve the contrast of the image displayed by the display device 100.

[0574] Examples of the display element 101 include liquid crystal display elements, organic EL display elements, inorganic EL display elements, plasma display elements, electronic paper display elements, LED display elements (micro LEDs, etc.), quantum dots, etc. These display elements may also have a touch panel function inside the display element.

[0575] exist Fig.29 In the specific example shown, the display device 100 constitutes an organic EL display device. The display device 100 includes an organic EL display panel 103 and optical films 55X, 155X (polarizing films 60X, 160X). The optical films 55X, 155X (polarizing films 60X, 160X) overlap on the image display surface of the organic EL display panel 103 to play a reflection suppression function. In this example, the optical films 55X, 155X include phase difference layers 40P, 140P that function as λ / 4 phase difference layers, and a single polarizing layer 52 that functions as a polarizer. The phase difference layers 40P, 140P are located between the polarizing layer 52 and the organic EL display panel 103.

[0576] According to the first embodiment, in the second region 42 of the phase difference layer 40 torn during transfer, the second orientation angle θ42 associated with the second slow axis A42 is greater than 0° and less than 10°, or greater than 170° and less than 180°. The direction in which the phase difference layer 40 is torn is affected by the orientation of the liquid crystal compound. Therefore, the phase difference layer 40 is torn in the second region 42 approximately along the direction of peeling off the substrate 20, that is, the long side direction (second direction D2). Thus, the tearing in the second region 42 of the phase difference layer 40 can be smoothly implemented. As a result, the generation of burrs at the end E40P in the short side direction (first direction D1) of the phase difference layer 40P can be effectively suppressed.

[0577] In addition, in the specific example of the first embodiment shown in the figure, the absolute value of the value obtained by subtracting 90° from the first orientation angle θ41 related to the first slow axis A41 in the first region 41 is smaller than the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42. According to such an example, the first region 41 is less likely to be torn in the long side direction (second direction D2) than the second region 42. As a result, the tearing in the second region 42 of the phase difference layer 40 can be smoothly implemented.

[0578] For example, in the specific example of the first embodiment, the first orientation angle θ41 may be greater than or equal to 10° and less than or equal to 170°.

[0579] In the specific example of the first embodiment described above, the first orientation angle θ41 may be greater than 30° and less than 150°. According to such an example, in the first region 41, tearing in the long side direction is significantly more difficult than in the second region 42. As a result, when the substrate 20 is peeled off from the long strip phase difference film 10, tearing of the phase difference layer 40 in the second region 42 can be effectively promoted.

[0580] In addition, in the specific example of the first embodiment shown in the figure, the absolute value of the value obtained by subtracting 90° from the third orientation angle θ43 related to the third slow axis A43 in the third region 43 is smaller than the absolute value of the value obtained by subtracting 90° from the second orientation angle θ42. According to such an example, the third region 43 is less likely to be torn in the long side direction (second direction D2) than the second region 42. As a result, the tearing in the second region 42 of the phase difference layer 40 can be smoothly implemented.

[0581] In the specific example of the first embodiment, the third orientation angle θ43 may be greater than or equal to 40° and less than or equal to 140°. Therefore, in the third region 43, tearing in the long side direction is significantly more difficult than in the second region 42. As a result, when the substrate 20 is peeled off from the long phase difference film 10, tearing of the phase difference layer 40 in the second region 42 can be effectively promoted.

[0582] In addition, in the specific example of the first embodiment described above, the first region 41 of the phase difference layer 40 may also include the center position of the phase difference layer 40 in the short side direction (first direction D1). In addition, the third region 43 may also include the end E40 of the phase difference layer 40 in the short side direction (first direction D1) of the phase difference layer 40. According to such an example, the area of ​​the first region 41 that is intentionally used as the phase difference film 10X can be largely ensured. On the other hand, the area of ​​the third region 43 that is intentionally left on the substrate 20 can be reduced. As a result, the yield rate when collecting the phase difference film 10X from the long strip phase difference film 10 can be fully improved.

[0583] In addition, in the specific example of the first embodiment shown in the figure, the long retardation film 10 includes an orientation film 30 located between the substrate 20 and the first region 41 and the second region 42 of the retardation layer 40. The third region 43 is in contact with the substrate 20. According to such an example, the orientation of the first region 41 and the second region 42 of the retardation layer 40 can be adjusted by the orientation film 30. In addition, the orientation of the third region 43 of the retardation layer 40 can be adjusted by the substrate 20.

[0584] In the specific example of the first embodiment, the alignment film may include a photo-alignment film. According to such an example, by irradiating polarized light, an alignment regulating force can be imparted to the alignment film.

[0585] In addition, in the specific example of the first embodiment described above, the substrate 20 may include a polyester film having a slow axis. The angle between the slow axis of the polyester film and the long side direction (the second direction D2) is 40° or more and 140° or less. According to such an example, by forming the third region 43 of the phase difference layer 40 on the polyester film, the third orientation angle θ43 associated with the third slow axis A43 of the third region 43 can be made 40° or more and 140° or less, and the tearing of the third region 43 in the long side direction can be made extremely difficult.

[0586] In the specific example of the first embodiment described above, the length L42 of the second region 42 of the phase difference layer 40 along the short side direction (first direction D1) may be 1 mm or more and 100 mm or less. According to such an example, the yield of the phase difference film 10X can be improved, and stable transfer of the phase difference layer 40 can be achieved.

[0587] In addition, in the specific example of the first embodiment described above, the length L41 of the first region 41 of the phase difference layer 40 along the short side direction (first direction D1) may be 12 times or more the length L42 of the second region 42 of the phase difference layer 40 along the short side direction (first direction D1). According to such an example, the yield of the phase difference film 10X can be improved, and stable transfer of the phase difference layer 40 can be achieved.

[0588] In the specific example of the first embodiment, the length L43 of the third region 43 of the phase difference layer 40 along the short side direction (first direction D1) is 0.5 mm or more and 50 mm or less. According to such an example, the yield of the phase difference film 10X can be improved, and the stable transfer of the phase difference layer 40 can be achieved.

[0589] In addition, in the specific example of the first embodiment described above, the in-plane phase difference Re(450) in the first region 41 of the phase difference layer 40 at a wavelength of 450nm is less than the in-plane phase difference Re(550) in the first region 41 of the phase difference layer 40 at a wavelength of 550nm. In addition, the in-plane phase difference Re(550) is less than the in-plane phase difference Re(650) in the first region 41 of the phase difference layer 40 at a wavelength of 650nm. In addition, the in-plane phase difference Re(550) is greater than 130nm and less than 153nm. According to such an example, the wavelength dispersion of the phase difference layer 40 is inverse dispersion. As a result, the variation of the in-plane phase difference Re corresponding to the wavelength can be suppressed, thereby achieving excellent color performance.

[0590] According to the second embodiment, the second region 142 of the phase difference layer 140 torn during transfer is non-oriented. In the second region 142, the liquid crystal compound is irregularly arranged. Therefore, the direction in which the phase difference layer 140 is torn in the second region 142 is not easily affected by the orientation of the liquid crystal compound contained in the phase difference layer 140. The phase difference layer 140 can be torn in the second region 142 roughly along the direction of peeling off the substrate 120, that is, the long side direction (the second direction D2). In addition, in the second embodiment, the liquid crystal compound in the third region 143 of the phase difference layer 140 is horizontally oriented. Therefore, when the phase difference layer 140 is torn along the long side direction (the second direction D2), the third region 143 can stably maintain close contact with the substrate 120. As a result, the tearing in the second region 142 of the phase difference layer 140 is smoothly implemented. As a result, the generation of burrs at the end E140P in the short side direction (the first direction D1) of the phase difference layer 140P can be effectively suppressed.

[0591] In addition, in the specific example of the second embodiment shown in the figure, the end region 132 of the orientation film 130 is not given an orientation restriction force. That is, the end region 132 does not have a structure with directivity. Therefore, the tearing in the end region 132 of the orientation film 130 is also smoothly implemented on the substrate 120 substantially along the peeling direction. From this point of view, the generation of burrs can also be suppressed.

[0592] In the specific example of the second embodiment described above, the third region 143 has a third slow axis A143. The third orientation angle θ143 between the third slow axis A143 and the long side direction may be greater than or equal to 40° and less than or equal to 140°. According to such an example, the phase difference layer 140 exhibits strong adhesion to the adjacent layer in the third region 143. Therefore, the tearing in the second region 142 of the phase difference layer 140 can be stably implemented, and the generation of burrs at the end E140P in the short side direction (first direction D1) of the phase difference layer 140P can be effectively suppressed.

[0593] From the perspective of reducing the burrs generated at the end E140P of the transferred phase difference layer 140P, the third orientation angle θ143 may be 40° or more, 50° or more, 60° or more, 70° or more, or 80° or more. The third orientation angle θ143 may be 140° or less, 130° or less, 120° or less, 110° or less, or 100° or less. The third orientation angle θ143 may also be 90°.

[0594] Example

[0595] The present disclosure is described in more detail by way of examples. The present disclosure is not limited by the following examples. Figure 30 to Figure 35In the figure, hatching lines corresponding to the orientation restriction force of the orientation film and the orientation state of the phase difference layer are marked. Figure 30 to Figure 35 The hatched lines in the diagram do not represent cross sections. Figure 30 to Figure 35 In the retardation layer, no pattern is given to a region where the liquid crystal compound does not have a regular orientation.

[0596] <Strip retardation film>

[0597] As described below, long-length retardation films of Example 1-1, Example 1-2, Example 2-1, Comparative Example 1, Comparative Example 2, and Comparative Example 3 were produced by a roll-to-roll method.

[0598] (Example 1-1)

[0599] By reference Figure 5 to Figure 11 The above-described manufacturing method is to manufacture the Figure 1 to Figure 4 The long phase difference film 10 is shown.

[0600] As the substrate, a PET film "Cosmoshine A4160 (thickness: 100 μm, PET film (A))" manufactured by Toyobo Co., Ltd. was used. The substrate was a biaxially stretched film and had in-plane birefringence. The stretching ratio in the short-side direction during biaxial stretching was greater than the stretching ratio in the long-side direction.

[0601] The first coating film having a thickness of 300 nm is formed by coating the untreated surface (non-primer surface) of the substrate with a composition for forming an alignment film. The composition for forming an alignment film comprises a polycinnamate compound and a propylene glycol monomethyl ether solution (solid content is 4.5%). The first coating film is dried by keeping it in an atmosphere at 100° C. for 1 minute. The first coating film is exposed to polarized light to produce an alignment film. The conditions for the polarized light exposure are: the irradiation wavelength is set to 310 nm, and the irradiation amount is set to 20 mJ / cm 2 Through the above operations, an intermediate including a substrate and an oriented film is obtained.

[0602] As reference Figure 7 and Figure 8 As described above, the exposure of the first coating film is partially exposed using a mask. Polarized light exposure is performed with polarized light having different polarization states in the central region and the end region of the first coating film. An orientation restricting force having an orientation angle of 45° is applied to the central region of the obtained alignment film. An orientation restricting force having an orientation angle of 0° is applied to the end region of the obtained alignment film.

[0603] With reference to the synthesis of compound 4 of Example 4 of JP5962760 B, a polymerizable liquid crystal compound was synthesized. The polymerizable liquid crystal compound exhibits inverse wavelength dispersion. Relative to 100 parts by mass of the polymerizable liquid crystal compound, 4 parts by mass of Irgacure907 are added as an initiator and 0.3 parts by mass of Megafac F-477 manufactured by DIC Corporation are added as a surfactant to prepare a polymerizable liquid crystal composition. The polymerizable liquid crystal composition further contains toluene in a manner that the solid content is 20%. The second coating film is formed by applying the polymerizable liquid crystal composition on the surface of the intermediate on which the oriented film is formed.

[0604] Next, the second coating film was dried by holding in an atmosphere at 120° C. for 1 minute. Then, a Fusion-UV device manufactured by Heraeus was used to irradiate the film at 300 mJ / cm 2 The second coating film is irradiated with ultraviolet rays at an irradiation amount of , thereby curing the second coating film 45 to form the phase difference layer 40. Through the above operation, a long phase difference film including a substrate, an alignment film, and a phase difference layer is obtained.

[0605] like Fig.30 As shown, the phase difference layer 40 contained in the long phase difference film 10 of Example 1 includes: a first region 41, which faces the central region 31 of the orientation film 30 in the third direction D3; a pair of second regions 42, which face the end regions 32 of the orientation film 30 in the third direction D3; and a pair of third regions 43, which are located on both outer sides of the orientation film 30 in the first direction D1 and face the substrate 20 in the third direction D3. In the first region 41, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 45°. In the second region 42, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 0°. In the third region 43, the polymerizable liquid crystal compound is horizontally oriented. The third orientation angle of the polymerizable liquid crystal compound in one of the pair of third regions 43 separated in the first direction D1 is 60°. The third orientation angle of the polymerizable liquid crystal compound in the other third region 43 is 87°. The in-plane phase difference Re in the first region 41 is 140nm. As described above, the in-plane phase difference Re was measured using a product named “RETS-100” manufactured by Otsuka Electronics Co., Ltd.

[0606] The width L41 of the first region 41 in the short side direction (first direction D1) perpendicular to the long side direction is 1250 mm. The width L42 of each second region 42 in the short side direction (first direction D1) perpendicular to the long side direction is 30 mm. The width L43 of each third region 43 in the short side direction (first direction D1) perpendicular to the long side direction is 5 mm.

[0607] (Example 1-2)

[0608] In Example 1-2, an intermediate 15 including a substrate 20 and an orientation film 30 is prepared in the same manner as in Example 1-1. The orientation film 30 of the obtained intermediate 15 includes: a central region 31 having an orientation limiting force with an orientation angle of 45°; and an end region 32 having an orientation limiting force with an orientation angle of 0°. However, in Example 1-2, a phase difference layer 40 is prepared on the intermediate 15 so that the length of the end region 32 of the orientation film 30 in the first direction D1 is longer than that in Example 1-1. The phase difference layer 40 is prepared by the same preparation method as in Example 1-1. However, in Example 1-2, the width of the phase difference layer 40 along the first direction D1 is made shorter than the width of the orientation film 30 along the first direction D1. The phase difference layer 40 is located only in the region facing the orientation film 30 in the third direction D3.

[0609] like Fig.31 As shown, the phase difference layer 40 contained in the long phase difference film 10 of Example 1-2 includes: a first region 41 facing the central region 31 of the orientation film 30 in the third direction D3; and a pair of second regions 42 facing the end regions 32 of the orientation film 30 in the third direction D3. In the first region 41, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 45°. In the second region 42, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 0°. The in-plane phase difference Re in the first region 41 is 140 nm. As described above, the in-plane phase difference Re is measured using a product named "RETS-100" manufactured by Otsuka Electronics Co., Ltd.

[0610] The width L41 of the first region 41 in the short direction (first direction D1) perpendicular to the long direction is 1250 mm. The width L42 of each second region 42 in the short direction (first direction D1) perpendicular to the long direction is 35 mm.

[0611] (Example 2-1)

[0612] In Example 2-1, an intermediate including a substrate and an alignment film was prepared in the same manner as in Example 1-1. Fig.15 As described above, the exposure of the first coating film is partially performed using a mask, and only the central area of ​​the first coating film is exposed to polarized light. Figure 13 to Figure 16 The above-described manufacturing method produces an intermediate 115 including a substrate 120 and an alignment film 130. In Example 2-1, a phase difference layer 140 is produced by the same manufacturing method as the phase difference layer 40 of Example 1-1. This method is also referred to Figure 17-18 The method for manufacturing the phase difference layer 140 is described.

[0613] In Example 2-1, an alignment regulating force was applied to the central region 131 of the alignment film 130 of the obtained intermediate 115 so that the alignment angle became 45°. No alignment regulating force was applied to the edge regions 132 of the obtained alignment film 130.

[0614] like Fig.32 As shown, the phase difference layer 140 contained in the long phase difference film 110 of Example 2-1 includes: a first region 141 facing the central region 131 of the orientation film 130 in the third direction D3; a pair of second regions 142 facing the end regions 132 of the orientation film 130 in the third direction D3; and a pair of third regions 143 located on both outer sides of the orientation film 130 in the first direction D1 and facing the substrate 120 in the third direction D3. In the first region 141, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 45°. In the second region 142, the polymerizable liquid crystal compound is non-oriented. In the third region 143, the polymerizable liquid crystal compound is horizontally oriented. The third orientation angle of the polymerizable liquid crystal compound in one of the pair of third regions 143 separated in the first direction D1 is 60°. The third orientation angle of the polymerizable liquid crystal compound in the other third region 143 is 87°. The in-plane phase difference Re in the first region 141 is 140 nm. As described above, the in-plane phase difference Re is measured using a product named "RETS-100" manufactured by Otsuka Electronics Co., Ltd.

[0615] The width L141 of the first region 141 in the short-side direction (first direction D1) perpendicular to the long-side direction is 1250 mm. The width L142 of each second region 142 in the short-side direction (first direction D1) perpendicular to the long-side direction is 30 mm. The width L143 of each third region 143 in the short-side direction (first direction D1) perpendicular to the long-side direction is 5 mm.

[0616] (Comparative Example 1)

[0617] The manufacturing method of the long strip phase difference film 210 of Comparative Example 1 is different from the manufacturing method of the long strip phase difference film of Example 1-1 only in that the entire area of ​​the first coating film is exposed to polarized light with the same polarized light. Therefore, in Comparative Example 1, the orientation film 230 is given an orientation restriction force with an orientation angle of 45° in the entire area. In Comparative Example 1, in the entire area of ​​the phase difference layer 240 facing the orientation film 130, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 45°.

[0618] like Fig.33As shown, the phase difference layer 240 contained in the long phase difference film 210 of comparative example 1 includes: a first region 241 facing the orientation film 230 in the third direction D3; and a pair of third regions 243 located on both outer sides of the orientation film 230 in the first direction D1 and facing the substrate 220 in the third direction D3. In the first region 241, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 45°. In the third region 243, the polymerizable liquid crystal compound is horizontally oriented. The third orientation angle of the polymerizable liquid crystal compound in one of the pair of third regions 243 separated in the first direction D1 is 60°. The third orientation angle of the polymerizable liquid crystal compound in the other third region 243 is 87°. The in-plane phase difference Re in the first region is 140nm. As described above, the in-plane phase difference Re is measured using a product named "RETS-100" manufactured by Otsuka Electronics Co., Ltd.

[0619] The width L241 of the first region 241 in the short side direction (first direction D1) orthogonal to the long side direction is 1310 mm. The width L243 of each third region 243 in the short side direction (first direction D1) orthogonal to the long side direction is 5 mm. The phase difference layer of the long phase difference film of Comparative Example 1 has a structure in which the structure of the first region 41 is applied to the region of the second region 42 of the phase difference layer of the long phase difference film of Example 1-1.

[0620] (Comparative Example 2)

[0621] The method for manufacturing the long strip phase difference film of Comparative Example 2 is different from the method for manufacturing the long strip phase difference film of Example 2-1 only in that the polarized light exposure is performed on the entire area of ​​the first coating film. Therefore, in Comparative Example 2, the orientation film is given an orientation restriction force with an orientation angle of 45° in the entire area. In Comparative Example 2, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 45° in the entire area of ​​the phase difference layer facing the orientation film.

[0622] like Fig.34As shown, the phase difference layer 340 contained in the long phase difference film 310 of comparative example 2 includes: a first region 341 facing the orientation film 330 in the third direction D3; and a pair of third regions 343 located on both outer sides of the orientation film 330 in the first direction D1 and facing the substrate 320 in the third direction D3. In the first region 341, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 45°. In the third region 343, the polymerizable liquid crystal compound is horizontally oriented. The third orientation angle of the polymerizable liquid crystal compound in one of the pair of third regions 343 separated in the first direction D1 is 60°. The third orientation angle of the polymerizable liquid crystal compound in the other third region 343 is 87°. The in-plane phase difference Re in the first region is 140nm. As described above, the in-plane phase difference Re is measured using a product named "RETS-100" manufactured by Otsuka Electronics Co., Ltd.

[0623] The width L341 of the first region 341 in the short side direction (first direction D1) orthogonal to the long side direction is 1310 mm. The width L343 of each third region 343 in the short side direction (first direction D1) orthogonal to the long side direction is 5 mm. The phase difference layer of the long phase difference film of Comparative Example 2 has a structure in which the structure of the first region 41 is applied to the region of the second region 42 of the phase difference layer of the long phase difference film of Example 2-1.

[0624] (Comparative Example 3)

[0625] In Comparative Example 3, an intermediate including a substrate and an orientation film is prepared in the same manner as in Example 2-1. The orientation film of the intermediate obtained includes: a central region having an orientation limiting force with an orientation angle of 45°; and an end region having no orientation limiting force. However, in Comparative Example 3, the length of the end region of the orientation film in the first direction D1 is made longer than that in Example 2-1. A phase difference layer is produced on the intermediate. The phase difference layer is produced by the same production method as in Example 2-1. However, in Comparative Example 3, the width of the phase difference layer along the second direction is made shorter than the width of the orientation film along the second direction. The phase difference layer is located only in the region facing the orientation film in the third direction D3.

[0626] like Fig.35As shown, in the long strip phase difference film 410 of comparative example 3, the phase difference layer 440 includes: a first region 441 facing the central region 431 of the orientation film 430 in the third direction D3; and a second region 442 facing the end region 432 of the orientation film 430 in the third direction D3. In the first region 441, the polymerizable liquid crystal compound is horizontally oriented at an orientation angle of 45°. In the second region 442, the polymerizable liquid crystal compound is non-oriented. The in-plane phase difference Re in the first region is 140 nm. As described above, the in-plane phase difference Re is measured using a product named "RETS-100" manufactured by Otsuka Electronics Co., Ltd.

[0627] The width L441 of the first region 441 in the short side direction (first direction D1) orthogonal to the long side direction is 1250 mm. The width L442 of each second region 442 in the short side direction (first direction D1) orthogonal to the long side direction is 30 mm. The phase difference layer of the long phase difference film of Comparative Example 3 has a structure in which the structure of the second region 42 is applied to the region of the third region 43 of the phase difference layer of the long phase difference film of Example 2-1.

[0628] <Evaluation>

[0629] By reference Figure 22 to Figure 27 The transfer method described is to laminate the long strip phase difference films 10, 110, 210, 310, 410 of Example 1-1, Example 1-2, Example 2-1, Comparative Example 1, Comparative Example 2, and Comparative Example 3 on the long strip transferred film 50 including the bonding layer 53, and then peel off the substrate 20, 120, 220, 320, 420 from the long strip phase difference films 10, 110, 210, 310, 410 bonded to the bonding layer 53, thereby producing a long strip optical film in a roll-to-roll manner. The length of the long strip phase difference film and the transferred film along the second direction D2 is set to about 20m, and a long strip optical film of about 20m is produced.

[0630] (Transfer film)

[0631] like Figure 30 to Figure 35 As shown, the transferred film 50 includes a substrate 51 and a bonding layer 53. The transferred film has the same structure among Example 1-1, Example 1-2, Example 2-1, Comparative Example 1, Comparative Example 2 and Comparative Example 3. FUJITAC TD80UL (thickness 80 μm, TAC film (A)) manufactured by Fujifilm Corporation is used as the substrate of the transferred film. A long strip of transferred film is produced by laminating a bonding layer on the substrate. The bonding layer is Panaclean PD-S1 (manufactured by PANAC Co., Ltd.) (thickness 25 μm). The width W51 (refer to Fig.21) is 1330 mm. The width W53 of the bonding layer in the transferred film along the short side direction (first direction D1) (refer to Fig.21 ) is 1280mm.

[0632] (Example 1-1)

[0633] like Fig.30 As shown, the long phase difference film 10 of Example 1-1 is stacked with the transferred film 50. The two ends E53 of the bonding layer 53 of the transferred film 50 in the first direction D1 face the second region 42 of the phase difference layer 40 in the third direction D3. By peeling off the substrate from the long phase difference film, the phase difference layer and the orientation film are transferred to the transferred film, thereby obtaining a long optical film. The phase difference layer and the orientation film are torn at a position P1 in the second region and facing the end E53 of the bonding layer. The outer portion of the phase difference layer and the orientation film in the first direction D1 that is closer to the torn position P1 remains on the substrate.

[0634] (Example 1-2)

[0635] like Fig.31 As shown, the long phase difference film 10 of Example 1-2 is stacked with the transferred film 50. The two ends E53 of the bonding layer 53 of the transferred film 50 in the first direction D1 face the second region 42 of the phase difference layer 40 in the third direction D3. By peeling the substrate from the long phase difference film, the phase difference layer and the orientation film are transferred to the transferred film, thereby obtaining a long optical film. The phase difference layer and the orientation film are torn at the position P2 in the second region, and the portion outside the position P2 in the first direction D1 remains on the substrate.

[0636] (Example 2-1)

[0637] like Fig.32 As shown, the long phase difference film 110 of Example 2-1 is stacked with the transferred film 50. The two ends E53 of the bonding layer 53 of the transferred film 50 in the first direction D1 face the second region 142 of the phase difference layer 140 in the third direction D3. By peeling off the substrate from the long phase difference film, the phase difference layer and the orientation film are transferred to the transferred film, thereby obtaining a long optical film. The phase difference layer and the orientation film are torn at a position P3 facing the end E53 of the bonding layer in the second region in the first direction D1. The outer portion of the phase difference layer and the orientation film in the first direction D1 that is closer to the torn position P3 remains on the substrate.

[0638] (Comparative Example 1)

[0639] like Fig.33As shown, the long phase difference film 210 of comparative example 1 is stacked with the transferred film 50. The two ends E53 of the bonding layer 53 of the transferred film 50 in the first direction D1 face the first region 241 of the phase difference layer 240 in the third direction D3. By peeling the substrate from the long phase difference film, the phase difference layer and the orientation film are transferred to the transferred film, thereby obtaining a long optical film. The phase difference layer and the orientation film are torn at the position P4 in the first region, and the portion outside the position P4 in the first direction D1 remains on the substrate.

[0640] (Comparative Example 2)

[0641] like Fig.34 As shown, the long phase difference film 310 of comparative example 2 is stacked with the transferred film 50. The two ends E53 of the bonding layer 53 of the transferred film 50 in the first direction D1 face the first region 341 of the phase difference layer 340 in the third direction D3. By peeling the substrate from the long phase difference film, the phase difference layer and the orientation film are transferred to the transferred film, thereby obtaining a long optical film. The phase difference layer and the orientation film are torn at the position P5 in the first region, and the portion outside the position P5 in the first direction D1 remains on the substrate.

[0642] (Comparative Example 3)

[0643] like Fig.35 As shown, the long strip phase difference film 410 of comparative example 3 is stacked with the transferred film 50. The two ends E53 of the bonding layer 53 of the transferred film 50 in the first direction D1 face the second region 442 of the phase difference layer 440 in the third direction D3. By peeling off the substrate from the long strip phase difference film, the phase difference layer and the orientation film are transferred to the transferred film, thereby obtaining a long strip optical film. The phase difference layer and the orientation film are torn at a position P6 in the second region on the first direction D1 in a part of the area along the long side direction, and the portion on the outside of the position P6 in the first direction D1 remains on the substrate. In other wider areas along the long side direction, the phase difference layer and the orientation film are not torn at the position P6 facing the end E53 of the bonding layer 53, but are transferred to the transferred film 50 over the full width of the second region along the first direction D1.

[0644] (Evaluation results)

[0645] For the long optical films produced as Example 1-1, Example 1-2, Example 2-1, Comparative Example 1, Comparative Example 2, and Comparative Example 3, it was confirmed whether burrs were generated at the ends of the phase difference layer. For Example 1-1, Example 1-2, and Example 2-1, burrs were not generated. For Comparative Example 1, Comparative Example 2, and Comparative Example 3, burrs were confirmed.

[0646] Regarding Comparative Example 3, in a wider area along the long side direction, the phase difference layer and the orientation film are not torn at the position P6 in the second area on the first direction D1, and a second area on the first direction D1 of the phase difference layer is transferred to the transferred film over the entire width including its end. The orientation film is also transferred to the transferred film over the entire width including its end in a wider area along the long side direction. As a result, in a part of the long side direction of the long optical film obtained as Comparative Example 3, there is a second area of ​​the phase difference layer that extends further outward in the first direction D1 than the bonding layer. The second area extending from the bonding layer is not bonded to the bonding layer. The second area extending from the bonding layer remains on the long optical film as a burr or a foreign object broken from the phase difference layer. In the manufacture of the long optical film of Comparative Example 3, the portion of the phase difference layer that is not bonded to the bonding layer contacts the first area of ​​the phase difference layer, and the first area is locally damaged to the extent that it cannot be processed as a product. Such inconvenience did not occur in Example 1-1, Example 1-2, Example 2-1, Comparative Example 1, and Comparative Example 2.

[0647] Fig.36 This is an optical microscope photograph showing the end portion in the first direction D1 of the retardation layer 40 of the long optical film 55 obtained as Example 1-1. Fig.37 This is an optical microscope photograph showing the end portion in the first direction D1 of the retardation layer 140 of the long optical film 155 obtained as Example 2-1. Fig.38 This is a photograph showing an end portion in the first direction D1 of the retardation layer of the long optical film obtained as Comparative Example 1. Fig.39 This is a photograph showing the end portion in the first direction D1 of the retardation layer of the long optical film obtained as Comparative Example 2. Fig.40 This is an optical microscope photograph showing the end portion of the retardation layer of the long optical film obtained as Comparative Example 3 in the first direction D1. Figures 36 to 40 The photographs shown are at 2x magnification. Figures 36 to 40 In the photograph shown, the phase difference layer and the alignment film are transferred to the area on the left.

[0648] Furthermore, although a plurality of embodiments and their modified examples have been described above, it is of course possible to appropriately combine the plurality of embodiments and modified examples for application.

[0649] Description of symbols

[0650] 10, 110: long phase difference film; 10R, 110R: roll; 10X, 110X: phase difference film; 12: winding core; 15: intermediate; 20, 120: substrate; 30, 130: orientation film; 30P, 130P: orientation film; 31, 131: central area; 32, 132: end area; 35, 135: first coating film; 40, 140: phase difference layer; 40P, 140P: phase difference layer; 41, 1 41: first region; 42, 142: second region; 43, 143: third region; 44, 144: liquid crystal composition; 45, 145: second coating film; 50: transferred film; 50R: roll; 52: polarizing layer; 53: bonding layer; 55: long optical film; 55R: roll; 55X, 155X: optical film; 60, 160: long polarizing film; 60R, 160R: roll; 60X, 160X: polarizing film; 7 0: manufacturing device; 71: supply core; 72: recovery core; 73: conveyor roller; 76: first supply device; 77: first drying device; 78: first curing device; 78A: first exposure device; 78B: first mask; 78C: second exposure device; 78D: second mask; 81: second supply device; 82: second drying device; 83: second curing device; 90: manufacturing device; 91: first supply core; 92: second supply core; 9 3: 1st recovery core; 94: 2nd recovery core; 95: conveying roller; 95A: 1st conveying roller; 95B: 2nd conveying roller; 100: display device; 103: organic EL display panel; D1: 1st direction; D2: 2nd direction; D3: 3rd direction; A20: substrate slow axis; A41: 1st slow axis; A42: 2nd slow axis; A43: 3rd slow axis; θ41: 1st orientation angle; θ42: 2nd orientation angle; θ43: 3rd orientation angle.

Claims

1. A long strip phase difference film, comprising a long side direction and a short side direction, wherein: The long strip phase difference film has: substrate; and a phase difference layer overlapping the substrate, The phase difference layer includes a first region and a pair of second regions. The first region is located between the pair of second regions in the short side direction. The phase difference layer includes a cured product of a liquid crystal composition. The second region has a second slow axis, A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

2. The long phase difference film according to claim 1, wherein: The first region has a first slow axis, An absolute value of a value obtained by subtracting 90° from a first orientation angle between the first slow axis and the longitudinal direction is smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

3. The long phase difference film according to claim 2, wherein: The first orientation angle is greater than or equal to 10° and less than or equal to 170°.

4. The long phase difference film according to claim 2, wherein: The first orientation angle is greater than or equal to 30° and less than or equal to 150°.

5. The long phase difference film according to any one of claims 1 to 4, wherein The first region includes the center of the phase difference layer in the short-side direction.

6. The long phase difference film according to any one of claims 1 to 5, wherein A length of the second region along the short-side direction is greater than or equal to 1 mm and less than or equal to 100 mm.

7. The long phase difference film according to any one of claims 1 to 6, wherein A length of the first region along the short side direction is 12 times or more the length of the second region along the short side direction.

8. The long phase difference film according to any one of claims 1 to 7, wherein The phase difference layer further comprises a pair of third regions. The pair of second regions are located between the pair of third regions in the short side direction. The first region has a first slow axis, The third region has a third slow axis, An absolute value of a value obtained by subtracting 90° from a third orientation angle between the third slow axis and the longitudinal direction is smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

9. The long phase difference film according to claim 8, wherein: The third orientation angle is greater than or equal to 40° and less than or equal to 140°.

10. The long phase difference film according to claim 8 or 9, wherein: The third region includes an end portion of the phase difference layer in the short-side direction.

11. The long phase difference film according to any one of claims 8 to 10, wherein: The long phase difference film includes an alignment film located between the substrate and the first region and the second region. The third region is in contact with the substrate.

12. The long strip phase difference film according to claim 11, wherein: The alignment film includes a photo-alignment film.

13. The long phase difference film according to claim 11 or 12, wherein: The substrate comprises a polyester film having a slow axis, The angle between the slow axis of the polyester film and the long-side direction is 40° or more and 140° or less.

14. The long phase difference film according to any one of claims 8 to 13, wherein A length of the third region along the short-side direction is greater than or equal to 0.5 mm and less than or equal to 50 mm.

15. The long phase difference film according to any one of claims 1 to 14, wherein The in-plane retardation Re(450) in the first region of the retardation layer at a wavelength of 450 nm is smaller than the in-plane retardation Re(550) in the first region of the retardation layer at a wavelength of 550 nm. The in-plane retardation Re(550) is smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm, The in-plane retardation Re(550) is greater than or equal to 130 nm and less than or equal to 153 nm.

16. A long optical film, comprising a long side direction and a short side direction, wherein: The long optical film comprises a substrate, a bonding layer and a phase difference layer in sequence. The phase difference layer includes a first region and a pair of second regions. The first region is located between the pair of second regions in the short side direction. The phase difference layer includes a cured product of a liquid crystal composition. The second region has a second slow axis, A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

17. The long optical film according to claim 16, wherein: The first region has a first slow axis, An absolute value of a value obtained by subtracting 90° from a first orientation angle between the first slow axis and the longitudinal direction is smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

18. The long optical film according to claim 17, wherein: The first orientation angle is greater than or equal to 10° and less than or equal to 170°.

19. A long polarizing film, comprising a long side direction and a short side direction, wherein: The long polarizing film has: a polarizing layer comprising a polarizer; and a phase difference layer overlapping the polarizing layer, The phase difference layer includes a first region and a pair of second regions. The first region is located between the pair of second regions in the short side direction. The phase difference layer includes a cured product of a liquid crystal composition. The second region has a second slow axis, A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

20. The long polarizing film according to claim 19, wherein: The first region has a first slow axis, An absolute value of a value obtained by subtracting 90° from a first orientation angle between the first slow axis and the longitudinal direction is smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

21. The long polarizing film according to claim 20, wherein: The first orientation angle is greater than or equal to 10° and less than or equal to 170°.

22. The long polarizing film according to claim 20, wherein: The first orientation angle is greater than or equal to 30° and less than or equal to 150°.

23. The long polarizing film according to any one of claims 19 to 22, wherein: The second region includes an end portion of the phase difference layer in the short-side direction.

24. The long polarizing film according to any one of claims 19 to 23, wherein: The first region includes the center in the short-side direction.

25. The long polarizing film according to any one of claims 19 to 24, wherein: A length of the second region along the short-side direction is greater than or equal to 1 mm and less than or equal to 100 mm.

26. The long polarizing film according to any one of claims 19 to 25, wherein: A length of the first region along the short side direction is 12 times or more the length of the second region along the short side direction.

27. The long polarizing film according to any one of claims 19 to 26, wherein: The in-plane retardation Re(450) in the first region of the retardation layer at a wavelength of 450 nm is smaller than the in-plane retardation Re(550) in the first region of the retardation layer at a wavelength of 550 nm. The in-plane retardation Re(550) is smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm, The in-plane retardation Re(550) is greater than or equal to 130 nm and less than or equal to 153 nm.

28. A method for manufacturing a long strip phase difference film, wherein: The method for manufacturing the long strip phase difference film comprises the following steps: Applying an alignment film-forming composition on a long substrate having a long side direction and a short side direction to form a first coating film; Irradiating the end regions in the short-side direction of the first coating film and the central region other than the end regions with polarized light having different polarization states, thereby forming an alignment film having alignment restricting forces in different alignment directions in the end regions and the central region by the first coating film; Applying a liquid crystal composition on an intermediate including the substrate and the alignment film to form a second coating film; as well as The second coating film is cured to form a phase difference layer including a cured product of the liquid crystal composition. The phase difference layer includes a first region facing the central region and a second region facing the end region. The second region has a second slow axis, A second orientation angle between the second slow axis and the long-side direction is greater than or equal to 0° and less than 10°, or greater than 170° and less than 180°.

29. The method for producing a long phase difference film according to claim 28, wherein: The first region has a first slow axis, An absolute value of a value obtained by subtracting 90° from a first orientation angle between the first slow axis and the longitudinal direction is smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

30. The method for producing a long phase difference film according to claim 29, wherein: The first orientation angle is greater than or equal to 10° and less than or equal to 170°.

31. The method for producing a long phase difference film according to claim 29, wherein: The first orientation angle is greater than or equal to 30° and less than or equal to 150°.

32. The method for producing a long phase difference film according to any one of claims 28 to 31, wherein: The first region includes the center in the short-side direction.

33. The method for producing a long phase difference film according to any one of claims 28 to 32, wherein: A length of the second region along the short-side direction is greater than or equal to 1 mm and less than or equal to 100 mm.

34. The method for producing a long phase difference film according to any one of claims 28 to 33, wherein: A length of the first region along the short side direction is 12 times or more the length of the second region along the short side direction.

35. The method for producing a long phase difference film according to any one of claims 28 to 34, wherein: The phase difference layer further comprises a pair of third regions. The pair of second regions are located between the pair of third regions in the short side direction. The first region has a first slow axis, The third region has a third slow axis, An absolute value of a value obtained by subtracting 90° from a third orientation angle between the third slow axis and the longitudinal direction is smaller than an absolute value of a value obtained by subtracting 90° from the second orientation angle.

36. The method for producing a long phase difference film according to claim 35, wherein: The third orientation angle is greater than or equal to 40° and less than or equal to 140°.

37. The method for producing a long phase difference film according to claim 35 or 36, wherein: The third region includes an end portion of the phase difference layer in the short-side direction.

38. The method for producing a long phase difference film according to any one of claims 35 to 37, wherein: The third region is in contact with the substrate.

39. The method for producing a long strip phase difference film according to claim 38, wherein: The substrate comprises a polyester film having a slow axis, The angle between the slow axis of the polyester film and the long-side direction is 40° or more and 140° or less.

40. The method for producing a long phase difference film according to any one of claims 35 to 39, wherein: A length of the third region along the short-side direction is greater than or equal to 0.5 mm and less than or equal to 50 mm.

41. The method for producing a long phase difference film according to any one of claims 28 to 40, wherein: The in-plane retardation Re(450) in the first region of the retardation layer at a wavelength of 450 nm is smaller than the in-plane retardation Re(550) in the first region of the retardation layer at a wavelength of 550 nm. The in-plane retardation Re(550) is smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm, The in-plane retardation Re(550) is greater than or equal to 130 nm and less than or equal to 153 nm.

42. A method for manufacturing a long optical film, wherein: The method for manufacturing the long optical film comprises the following steps: The long phase difference film according to any one of claims 1 to 15 is laminated on a long transfer film including an adhesive layer; and The substrate is peeled off from the long phase difference film bonded to the bonding layer.

43. The method for manufacturing a long optical film according to claim 42, wherein: The long optical film includes the first region of the phase difference layer and a part of the second region. The remaining portion of the second region of the phase difference layer except for the portion remains on the substrate.

44. The method for manufacturing a long optical film according to claim 42 or 43, wherein: In a state where the long phase difference film is stacked on the transferred film, the second region faces an end portion of the bonding layer in the short-side direction.

45. The method for producing a long optical film according to any one of claims 42 to 44, wherein: The long strip retardation film is the long strip retardation film according to any one of claims 8 to 14, The long optical film includes the first region of the phase difference layer and a part of the second region. The third region and the remaining portion of the second region of the phase difference layer except for the portion remain on the substrate.

46. ​​The method for producing a long optical film according to any one of claims 42 to 45, wherein: The long strip retardation film is the long strip retardation film according to any one of claims 8 to 14, When the long phase difference film is stacked on the transferred film, the second region faces the end of the bonding layer in the short side direction, and the third region is located outside the bonding layer in the short side direction and faces the substrate of the transferred film.

47. The method for producing a long optical film according to any one of claims 42 to 46, wherein: The transferred film includes a polarizing layer containing a polarizer.

48. A long strip phase difference film, comprising a long side direction and a short side direction, wherein: The long strip phase difference film has: substrate; and a phase difference layer overlapping the substrate, The phase difference layer includes a first region, a pair of second regions, and a pair of third regions. The first region is located between the pair of second regions in the short side direction. The pair of second regions are located between the pair of third regions in the short side direction. The phase difference layer includes a cured product of a liquid crystal composition. The second region is non-oriented, The third region is horizontally oriented.

49. The long strip phase difference film according to claim 48, wherein: The third region has a third slow axis, A third orientation angle between the third slow axis and the longitudinal direction is greater than or equal to 40° and less than or equal to 140°.

50. The long phase difference film according to claim 48 or 49, wherein: The first region has a first slow axis, A first orientation angle between the first slow axis and the long-side direction is 10° or more and 80° or less, or 100° or more and 170° or less.

51. The long phase difference film according to any one of claims 48 to 50, wherein The third region includes an end portion of the phase difference layer in the short-side direction.

52. The long phase difference film according to any one of claims 48 to 51, wherein The first region includes the center of the phase difference layer in the short-side direction.

53. The long phase difference film according to any one of claims 48 to 52, wherein: The long phase difference film includes an alignment film located between the substrate and the first region and the second region. The third region is in contact with the substrate.

54. The long strip phase difference film according to claim 53, wherein: The alignment film includes a photo-alignment film.

55. The long phase difference film according to any one of claims 48 to 54, wherein The substrate comprises a polyester film.

56. The long strip phase difference film according to claim 55, wherein: The polyester film has a slow axis, The angle between the slow axis of the polyester film and the long-side direction is 40° or more and 140° or less.

57. The long phase difference film according to any one of claims 48 to 56, wherein A length of the second region along the short-side direction is greater than or equal to 1 mm and less than or equal to 200 mm.

58. The long phase difference film according to any one of claims 48 to 57, wherein A length of the third region along the short-side direction is greater than or equal to 0.5 mm and less than or equal to 50 mm.

59. The long phase difference film according to any one of claims 48 to 58, wherein A length of the first region along the short side direction is six times or more of a length of the second region along the short side direction.

60. The long phase difference film according to any one of claims 48 to 59, wherein The in-plane retardation Re(450) in the first region of the retardation layer at a wavelength of 450 nm is smaller than the in-plane retardation Re(550) in the first region of the retardation layer at a wavelength of 550 nm. The in-plane retardation Re(550) is smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm, The in-plane retardation Re(550) is greater than or equal to 130 nm and less than or equal to 153 nm.

61. A long optical film, comprising a long side direction and a short side direction, wherein: The long optical film comprises a substrate, a bonding layer and a phase difference layer in sequence. The phase difference layer includes a first region and a pair of second regions. The first region is located between the pair of second regions in the short side direction. The phase difference layer includes a cured product of a liquid crystal composition. The second region is non-oriented.

62. A long polarizing film, comprising a long side direction and a short side direction, wherein: The long polarizing film has: a polarizing layer including a polarizer; and a phase difference layer overlapping the polarizing layer, The phase difference layer includes a first region and a pair of second regions. The first region is located between the pair of second regions in the short side direction. The phase difference layer includes a cured product of a liquid crystal composition. The second region is non-oriented.

63. The long polarizing film according to claim 62, wherein: The first region has a first slow axis, A first orientation angle between the first slow axis and the long-side direction is 10° or more and 80° or less, or 100° or more and 170° or less.

64. The long polarizing film according to claim 62 or 63, wherein: The second region includes an end portion of the phase difference layer in the short-side direction.

65. The long polarizing film according to any one of claims 62 to 64, wherein: The first region includes the center of the phase difference layer in the short-side direction.

66. The long polarizing film according to any one of claims 62 to 65, wherein A length of the second region along the short-side direction is greater than or equal to 1 mm and less than or equal to 100 mm.

67. The long polarizing film according to any one of claims 62 to 66, wherein: A length of the first region along the short side direction is 12 times or more the length of the second region along the short side direction.

68. The long polarizing film according to any one of claims 62 to 67, wherein The in-plane retardation Re(450) in the first region of the retardation layer at a wavelength of 450 nm is smaller than the in-plane retardation Re(550) in the first region of the retardation layer at a wavelength of 550 nm. The in-plane retardation Re(550) is smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm, The in-plane retardation Re(550) is greater than or equal to 130 nm and less than or equal to 153 nm.

69. A method for manufacturing a long strip phase difference film, wherein: The method for manufacturing the long strip phase difference film comprises the following steps: Applying an alignment film-forming composition on a long substrate having a long side direction and a short side direction to form a first coating film; irradiating a central region of the first coating film except for the end regions in the short-side direction with polarized light, thereby forming an alignment film having an alignment regulating force in the central region by the first coating film; Applying a liquid crystal composition on an intermediate including the substrate and the alignment film to form a second coating film; and The second coating film is cured to form a phase difference layer including a cured product of the liquid crystal composition. The phase difference layer includes: a first region facing the central region; a second region facing the end region; and a third region facing the substrate on the outside of the alignment film in the short side direction. The third region is horizontally oriented.

70. The method for manufacturing a long strip phase difference film according to claim 69, wherein: The third region has a third slow axis, A third orientation angle between the third slow axis and the longitudinal direction is greater than or equal to 40° and less than or equal to 140°.

71. The method for producing a long strip phase difference film according to claim 69 or 70, wherein: The first region has a first slow axis, A first orientation angle between the first slow axis and the long-side direction is 10° or more and 80° or less, or 100° or more and 170° or less.

72. The method for producing a long phase difference film according to any one of claims 69 to 71, wherein: The third region includes an end portion of the phase difference layer in the short-side direction.

73. The method for producing a long phase difference film according to any one of claims 69 to 72, wherein: The first region includes the center of the phase difference layer in the short-side direction.

74. The method for producing a long phase difference film according to any one of claims 69 to 73, wherein: The substrate comprises a polyester film having a slow axis, The angle between the slow axis of the polyester film and the long-side direction is 40° or more and 140° or less.

75. The method for producing a long phase difference film according to any one of claims 69 to 74, wherein: A length of the second region along the short-side direction is greater than or equal to 1 mm and less than or equal to 200 mm.

76. The method for producing a long phase difference film according to any one of claims 69 to 75, wherein: A length of the third region along the short-side direction is greater than or equal to 0.5 mm and less than or equal to 50 mm.

77. The method for producing a long phase difference film according to any one of claims 69 to 76, wherein: A length of the first region along the short side direction is six times or more of a length of the second region along the short side direction.

78. The method for producing a long phase difference film according to any one of claims 69 to 77, wherein: The in-plane retardation Re(450) in the first region of the retardation layer at a wavelength of 450 nm is smaller than the in-plane retardation Re(550) in the first region of the retardation layer at a wavelength of 550 nm. The in-plane retardation Re(550) is smaller than the in-plane retardation Re(650) in the first region of the retardation layer at a wavelength of 650 nm, The in-plane retardation Re(550) is greater than or equal to 130 nm and less than or equal to 153 nm.

79. A method for manufacturing a long optical film, wherein: The method for manufacturing the long optical film comprises the following steps: The long phase difference film according to any one of claims 48 to 60 is laminated on a long transfer film including an adhesive layer; and The substrate is peeled off from the long phase difference film bonded to the bonding layer.

80. The method for manufacturing a long optical film according to claim 79, wherein: The long optical film includes the first region of the phase difference layer and a part of the second region. The third region and the remaining portion of the second region of the phase difference layer except for the portion remain on the substrate.

81. The method for manufacturing a long optical film according to claim 79 or 80, wherein: When the long phase difference film is stacked on the transferred film, the second region faces the end of the bonding layer in the short side direction, and the third region is located outside the bonding layer in the short side direction and faces the substrate of the transferred film.

82. The method for producing a long optical film according to any one of claims 79 to 81, wherein: The transferred film includes a polarizing layer containing a polarizer.

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