JP2013242508A - Optical film, transfer body for optical film, image display device, and mold for manufacturing optical film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively avoid deterioration of orientation in a liquid crystal layer of a pattern retardation film applied to three-dimensional image display in a passive system, to improve adhesion between an orientation film and the liquid crystal layer better than before.SOLUTION: An optical film includes a base material 2 made of a transparent film, an orientation film 3 prepared on one surface of the base material 2, and a liquid crystal layer 4 prepared on the orientation film 3 and oriented and solidified by an orientation regulating force of the orientation film 3. The orientation film 3 has the ten-point average roughness (Rz) of 10 nm or more and 45 nm or less.

Description

  The present invention relates to an optical film such as a pattern phase difference film, a half phase difference plate, and a quarter phase difference plate applied to a three-dimensional image display by a passive method, an image display device using them, and production of these optical films. It is about the method.

  2. Description of the Related Art Conventionally, with respect to an optical film applied to an image display device or the like, a method for securing desired optical characteristics by aligning a polymerizable liquid crystal with an alignment film has been proposed. For the production of the alignment film, a molding process using a mold for molding, a rubbing process for a polyimide film, and the like have been proposed.

  That is, in the passive image display device, pixels that are continuous in the vertical direction of the image display panel are sequentially and alternately assigned to the right eye and the left eye, and are driven by the image data for the right eye and the left eye, respectively. Thus, in the passive method, the image for the right eye and the image for the left eye are displayed simultaneously. In this manner, the screen of the image display panel is alternately divided into a region for displaying a right-eye image and a region for displaying a left-eye image by a band-shaped region having a short side in a vertical direction and a long side in a horizontal direction. Is done.

  In the passive type image display device, a pattern retardation film, which is an optical film including an alignment film and a polymerizable liquid crystal layer, is arranged on a display screen, and the pattern retardation film is used for the right eye and the left eye of the image display panel. Light emitted from the pixel by linearly polarized light is converted into circularly polarized light having different rotation directions for the right eye and the left eye, and then emitted.

  For this reason, in the pattern retardation film, an alignment film in which the alignment regulating force is controlled is produced on the surface of the substrate made of a transparent film, and a liquid crystal material is further applied. In the pattern phase difference film, the liquid crystal material is patterned and cured by the alignment regulating force of the alignment film, thereby giving a phase difference corresponding to the light emitted from the image display panel by the liquid crystal material layer. For this alignment film, for example, a method has been proposed in which a fine uneven shape formed on the surface of a molding die is molded into a molding resin layer made of an ultraviolet curable resin or the like (Patent Document). 1). Instead of this, a method has also been proposed in which a polyimide film on a base material is rubbed (Patent Document 2).

  However, the optical film in which the alignment film and the polymerizable liquid crystal layer are sequentially laminated on the transparent substrate as described above has a problem that the adhesion between the alignment film and the polymerizable liquid crystal layer is still insufficient in practice. That is, when a polyimide film is applied to the alignment film, the adhesion between the polyimide and the polymerizable liquid crystal is weak in the first place, which makes it difficult to sufficiently secure the adhesion. One method for solving this problem is to mix an adhesion promoter into the polymerizable liquid crystal. However, this method has a problem that the orientation of the polymerizable liquid crystal layer deteriorates. Even when a mold for molding is used, it is difficult to ensure sufficient adhesion between the alignment film and the polymerizable liquid crystal layer. In this case, a method of improving the adhesion by applying a surface treatment such as corona treatment or plasma treatment to the alignment film can be considered, but there is also a problem that the alignment of the polymerizable liquid crystal layer deteriorates in this case.

JP 2010-152296 A Special table 2007-50613 gazette

  The present invention has been made in view of such a situation, and with respect to an optical film such as a pattern retardation film applied to a three-dimensional image display by a passive method, by effectively avoiding the deterioration of alignment in a liquid crystal layer, It aims at improving the adhesiveness of an orientation film and a liquid-crystal layer compared with.

  The present inventor has made extensive studies to solve the above-mentioned problems, and has come up with the idea that an uneven shape that does not affect the alignment of the liquid crystal is produced in the alignment film, thereby completing the present invention.

(1) a substrate made of a transparent film;
An alignment film produced on one surface of the substrate;
A liquid crystal layer produced on the alignment film and aligned and solidified by the alignment regulating force of the alignment film;
The alignment film is
Ten-point average roughness (Rz) is 10 nm or more and 45 nm or less.

  According to (1), the variation 3σ of the gradient θ related to black luminance can be made sufficiently small to make the black luminance sufficiently small, whereby the phase difference in transmitted light can be made much more accurate than before. Can be granted. In general, since the average surface roughness (Ra) of the alignment film can be set to 1 nm or more and 4 nm or less, alignment deterioration in the retardation layer, which is a liquid crystal layer, can be effectively avoided, and the alignment film and Adhesion with the liquid crystal layer can be improved.

(2) In (1),
The alignment film is
The average surface roughness (Ra) is 1 nm or more and 4 nm or less.

  According to (2), when the average surface roughness (Ra) of the alignment film is 1 nm or more and 4 nm or less, more specifically, alignment deterioration in the retardation layer that is a liquid crystal layer is effectively avoided. Thus, the adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case.

(3) In (1) or (2),
The liquid crystal layer is
A band-shaped right-eye region that gives a phase difference corresponding to light emitted from pixels of an image display panel driven by right-eye image data, and light emitted from pixels of the image display panel driven by left-eye image data Band-shaped left eye regions that provide corresponding phase differences are provided alternately.

  If it is (3), it can be applied to an optical film which is a pattern retardation film.

(4) In (1) or (2),
The liquid crystal layer imparts a phase difference of ½ wavelength or ¼ wavelength to transmitted light.

  According to (4), it can be applied to an optical film such as a ½ phase plate or a ¼ phase plate.

(5) a first substrate made of a transparent film;
A first alignment film produced on one surface of the first substrate;
A first liquid crystal layer produced on the first alignment film and aligned and solidified by the alignment regulating force of the first alignment film;
A second alignment film formed on the first liquid crystal layer;
A second liquid crystal layer produced on the second alignment film and aligned and solidified by the alignment regulating force of the second alignment film;
The first and second alignment films are
Ten-point average roughness (Rz) is 10 nm or more and 45 nm or less.

According to (5)
When the first and second liquid crystal layers are applied to the configuration of a circularly polarizing plate or the like that sequentially gives a phase difference to transmitted light, and the first and second liquid crystal layers are laminated on one surface of the base, Luminance can be made sufficiently small, and deterioration of alignment in the retardation layer, which is a liquid crystal layer, can be effectively avoided, and adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case.

(6) a substrate made of a transparent film;
A first alignment film produced on one surface of the substrate;
A first liquid crystal layer produced on the first alignment film and aligned and solidified by the alignment regulating force of the first alignment film;
A second alignment film produced on the other surface of the substrate;
A second liquid crystal layer produced on the second alignment film and aligned and solidified by the alignment regulating force of the second alignment film;
The first and second alignment films are
Ten-point average roughness (Rz) is 10 nm or more and 45 nm or less.

According to (6)
When the first and second liquid crystal layers are applied to a configuration such as a circularly polarizing plate that sequentially gives a phase difference to transmitted light by the first and second liquid crystal layers, and the first and second liquid crystal layers are respectively laminated on both surfaces of the base material, It can be made sufficiently small, and the deterioration of alignment in the retardation layer that is a liquid crystal layer can be effectively avoided, and the adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case.

(7) In (5) or (6),
The first and second alignment films are
The average surface roughness (Ra) is 1 nm or more and 4 nm or less.

  According to (7), more specifically, it is possible to effectively avoid the deterioration of the alignment in the retardation layer that is a liquid crystal layer, and to improve the adhesion between the alignment film and the liquid crystal layer as compared with the conventional case.

(8) a transfer layer having at least a liquid crystal layer that is aligned and solidified by the alignment regulating force of the alignment film;
A support for holding the transfer layer,
The alignment film is
Ten-point average roughness (Rz) is 10 nm or more and 45 nm or less.

  According to (8), when applied to a transfer member for an optical film used for an optical film, the variation 3σ of the inclination θ related to the black luminance can be sufficiently reduced, and the black luminance can be sufficiently reduced. The phase difference can be imparted to the transmitted light with higher accuracy than in the past. Further, since the average surface roughness (Ra) of the alignment film can be set to 1 nm or more and 4 nm or less, the alignment film and the liquid crystal layer can be effectively avoided from deterioration of alignment in the retardation layer which is a liquid crystal layer. Adhesion with can be improved.

(9) In (8),
The alignment film is
The average surface roughness (Ra) is 1 nm or more and 4 nm or less.

  According to (9), when the average surface roughness (Ra) of the alignment film is 1 nm or more and 4 nm or less, more specifically, alignment deterioration in the retardation layer that is a liquid crystal layer is effectively avoided. Thus, the adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case.

(10) In (8) or (9),
The liquid crystal layer is
A liquid crystal layer for a ½ wavelength plate that imparts a phase difference of ½ wavelength to the transmitted light, and a liquid crystal layer for a ¼ wavelength plate that imparts a phase difference of a ¼ wavelength to the transmitted light,
The alignment film is
An alignment film for a half-wave plate according to the liquid crystal layer for the half-wave plate;
An alignment film for a quarter-wave plate according to the liquid crystal layer for a quarter-wave plate,
The transfer layer is
It is a laminate of the liquid crystal layer for half-wave plates, the alignment film for half-wave plates, the liquid crystal layer for quarter-wave plates, and the alignment film for quarter-wave plates.

  According to (10), when applied to a transfer member for an optical film for a circularly polarizing plate having a laminated structure of a half-wave plate and a quarter-wave plate, an alignment film for a half-wave plate, 1/4 When the alignment film for the wave plate is transferred integrally, it is possible to effectively avoid the deterioration of the alignment in the retardation layer, which is a liquid crystal layer, and to improve the adhesion between the alignment film and the liquid crystal layer as compared with the conventional case. it can.

(11) In (8) or (9),
The liquid crystal layer is
A liquid crystal layer for a ½ wavelength plate that imparts a phase difference of ½ wavelength to the transmitted light, and a liquid crystal layer for a ¼ wavelength plate that imparts a phase difference of a ¼ wavelength to the transmitted light,
The alignment film is
An alignment film for a half-wave plate according to the liquid crystal layer for the half-wave plate;
An alignment film for a quarter-wave plate according to the liquid crystal layer for a quarter-wave plate,
The transfer layer is
A laminate of the liquid crystal layer for half-wave plates, the alignment film for half-wave plates, and the liquid crystal layer for quarter-wave plates,
The support includes the alignment film for a quarter-wave plate.

  According to (11), it is applied to an optical film transfer body for a circularly polarizing plate having a laminated structure of a half-wave plate and a quarter-wave plate, and only the half-wave plate alignment film is integrated. When transferring, it is possible to effectively avoid the deterioration of the alignment in the retardation layer that is a liquid crystal layer, and to improve the adhesion between the alignment film and the liquid crystal layer as compared with the conventional case.

(12) a substrate made of a transparent film;
An optical functional layer of a linearly polarizing plate that functions as a linearly polarizing plate;
The optical functional layer of the circularly polarizing plate that functions as a circularly polarizing plate is laminated,
The optical functional layer of the circularly polarizing plate is an optical functional layer formed by the transfer layer provided on the optical film transfer body according to any one of (8), (9), (10), and (11). .

  According to (12), with respect to the optical film produced using the optical film transfer member according to any one of (8), (9), (10), or (11), the inclination θ related to black luminance The black luminance can be sufficiently reduced by sufficiently reducing the variation 3σ of the light intensity, and thereby, the phase difference can be imparted to the transmitted light with higher accuracy than in the past. Further, since the average surface roughness (Ra) of the alignment film can be set to 1 nm or more and 4 nm or less, the alignment film and the liquid crystal layer can be effectively avoided from deterioration of alignment in the retardation layer which is a liquid crystal layer. Adhesion with can be improved.

  (13) The optical film according to any one of (1), (2), (3), (4), (5), (6), (7), or (12) is used as the front side surface of the image display panel. To place.

(14) In a mold for manufacturing an optical film that is used for forming an alignment film by shaping,
The ten-point average roughness (Rz) of the part subjected to shaping is 10 nm or more and 45 nm or less.

  According to (14), with respect to the alignment film produced by this production mold, sufficient alignment regulation force can be ensured, and sufficient surface roughness can be ensured. By effectively avoiding the deterioration of the alignment, the adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case. In addition, the variation 3σ of the slope θ related to black luminance can be made sufficiently small to make the black luminance sufficiently small, whereby a phase difference can be given to transmitted light with higher accuracy than in the past.

(15) In (14),
The average surface roughness (Ra) of the portion subjected to the shaping is 1 nm or more and 4 nm or less.

  According to (15), more specifically, it is possible to effectively avoid the deterioration of the alignment in the retardation layer that is the liquid crystal layer, and to improve the adhesion between the alignment film and the liquid crystal layer as compared with the conventional case. .

(16) In (14) or (15),
In the part to be subjected to the shaping,
A first region having a strip shape in which a line-shaped uneven shape is formed; and a second region having a band shape in which a line-shaped uneven shape having a different extension direction from the line-shaped uneven shape in the first region is formed; Were produced alternately one after the other.

  According to (16), the adhesiveness between the alignment film and the liquid crystal layer can be improved as compared with the prior art when applied to a mold for producing a patterned retardation film.

  By effectively avoiding the deterioration of the alignment in the liquid crystal layer, the adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case. In addition, the variation 3σ of the slope θ related to black luminance can be made sufficiently small to make the black luminance sufficiently small, whereby a phase difference can be given to transmitted light with higher accuracy than in the past.

It is a figure which shows the pattern phase difference film which concerns on 1st Embodiment of this invention. It is a flowchart which shows the manufacturing process of the pattern phase difference film of FIG. It is a figure which shows the manufacturing process of a roll plate. It is a figure which shows the continuation of FIG. It is a figure which shows the change of the surface shape by a rubbing process. It is the figure which expanded the magnification further about the example of FIG. FIG. 6 is a diagram in which the magnification of the example of FIG. 5 is further enlarged than that of FIG. 6. It is a figure which shows the surface shape in case the frequency | count of rubbing is few. It is a figure which shows the surface shape at the time of increasing the frequency | count of rubbing from the example of FIG. It is a figure which shows the surface shape at the time of increasing the frequency | count of rubbing further from the example of FIG. It is a figure which shows the measurement result of the surface shape in the example of FIG. It is a figure which shows the measurement result of the surface shape in the example of FIG. It is a figure which shows the measurement result of the surface shape in the example of FIG. It is a photograph which shows the cross section of a pattern phase difference film. It is a figure which shows the phase difference plate which concerns on 2nd Embodiment of this invention. It is a figure where it uses for description of the metal mold | die for manufacture of the phase difference plate of FIG. It is a figure where it uses for description of the measuring device which concerns on 3rd Embodiment. It is a figure which shows dispersion | variation by rubbing process time. It is a figure which shows dispersion | variation by rubbing process time. It is a figure which shows the relationship between a root mean square roughness and dispersion | variation. It is a figure which shows the relationship between ten-point average roughness and dispersion | variation. It is a photograph which shows the surface shape of alignment film. It is a photograph which shows the surface shape of the alignment film when an optical characteristic is inferior by contrast with FIG. It is sectional drawing of the optical film which concerns on 5th Embodiment. It is a figure where it uses for description of arrangement | positioning of each member in the optical film of FIG. It is sectional drawing of the optical film which concerns on 6th Embodiment. It is sectional drawing of the optical film which concerns on 7th Embodiment. It is sectional drawing of the transfer film applied to the optical film of FIG. It is sectional drawing of the optical film which concerns on 8th Embodiment. It is sectional drawing of the transfer film applied to the optical film of FIG.

[First Embodiment]
FIG. 1 is a view showing a pattern retardation film according to the first embodiment of the present invention. In the image display apparatus according to the first embodiment, the pixels of the liquid crystal display panel that are continuous in the vertical direction (the direction corresponding to the left-right direction in FIG. 1) sequentially and alternately display the right-eye image. The pixel for the left eye and the pixel for the left eye for displaying the image for the left eye are allocated, and driven by the image data for the right eye and the left eye, respectively. As a result, the image display device alternately divides the display screen into a band-like region for displaying an image for the right eye and a band-like region for displaying an image for the left eye, so that the image for the right eye and the image for the left eye are simultaneously displayed. indicate. In this image display device, the pattern phase difference film 1 shown in FIG. 1 is disposed on the panel surface of the liquid crystal display panel, and the pattern phase difference film 1 corresponds to light emitted from pixels for the right eye and the left eye, respectively. To give the phase difference. Thereby, this image display apparatus displays a desired three-dimensional image by a passive method.

  In the pattern retardation film 1, an alignment film 3 and a retardation layer 4 are sequentially formed on one surface of a base material 2 made of a transparent film such as TAC (triacetyl cellulose). In the pattern retardation film 1, the retardation layer 4 is a liquid crystal layer made of a polymerizable liquid crystal material such as acrylic. The pattern retardation film 1 is solidified (cured) while the liquid crystal material of the retardation layer 4 maintains refractive index anisotropy, and the alignment of the liquid crystal material is patterned by the alignment regulating force of the alignment film 3. In FIG. 1, the orientation of the liquid crystal molecules is exaggerated by an elongated ellipse. By this patterning, the pattern phase difference film 1 is formed in a band shape alternately with the right-eye area A and the left-eye area B sequentially with a certain width corresponding to the pixel assignment in the liquid crystal display panel. A phase difference corresponding to each of the light emitted from the right-eye and left-eye pixels is given. Here, the slow axis direction of the adjacent belt-like region is usually any combination of +45 degrees and −45 degrees, 0 degrees and +90 degrees, or 0 degrees and −90 degrees with respect to the horizontal direction. Is done.

  The pattern phase difference film 1 is coated with a molding resin, which is a resin used for molding a fine concavo-convex shape, and a molding resin layer 5 is formed from this molding resin. In the pattern retardation film 1, the alignment film 3 is formed by the uneven shape on the surface of the shaping resin layer 5. In this embodiment, an ultraviolet curable resin is applied to the shaping resin. Further, as the ultraviolet curable resin, it is possible to use an acrylate-based, methacrylate-based or epoxy-based monomer, a prepolymer, or a mixture thereof to which a photopolymerization initiator such as benzophenone or aromatic iodonium is added. it can.

  That is, the pattern retardation film 1 is formed with a minute uneven shape formed on the surface of a mold, which will be described later, on the shaping resin layer 5 to produce a minute uneven shape related to the alignment film 3. The retardation layer 4 is patterned by the orientation regulating force due to. For this reason, in the alignment film 3, strip-shaped regions respectively corresponding to the strip-shaped regions A and B for the right eye and the left eye are sequentially formed, and minute uneven shapes are respectively produced. Here, the minute concavo-convex shape is formed by a line-shaped (linear) concavo-convex shape extending in one direction, and the direction extending in the one direction is different by 90 degrees between the right-eye region A and the left-eye region B. And is inclined at 45 degrees with respect to the extending direction of each region (the horizontal direction on the display screen, corresponding to the direction connecting the upper right and the lower left in FIG. 1). In addition to the basic structure shown in FIG. 1, the pattern retardation film 1 is provided with an adhesive layer, a separator film, an antireflection film, and the like as necessary.

[Pattern retardation film manufacturing process]
FIG. 2 is a schematic diagram showing a manufacturing process of the pattern retardation film 1. In the manufacturing process 10, the base material 2 is provided by a roll, and the base material 2 is supplied from a supply reel 11. In the manufacturing process 10, a coating solution of an ultraviolet curable resin is applied to the substrate 2 by the die 12. In this manufacturing process 10, the roll plate 20 is a cylindrical mold in which the uneven shape related to the alignment film 3 of the pattern retardation film 1 is formed on the peripheral side surface. In the manufacturing process 10, the base material 2 coated with the ultraviolet curable resin is pressed against the roll plate 20 by the pressure roller 14, and the ultraviolet curable resin is cured by irradiation with ultraviolet rays by the ultraviolet irradiation device 15 made of a high-pressure mercury lamp. Thereby, the manufacturing process 10 transfers the uneven | corrugated shape formed in the surrounding side surface of the roll plate 20 to the base material 2. FIG. Thereafter, the substrate 2 is peeled off integrally with the ultraviolet curable resin cured from the roll plate 20 by the peeling roller 16, and a liquid crystal material is applied by the die 19. Thereafter, the liquid crystal material is cured by ultraviolet irradiation by the ultraviolet irradiation device 17, and then wound around the take-up reel 18. The pattern retardation film 1 is produced by forming an adhesive layer, an antireflection layer, and the like on the sheet material wound on the take-up reel 18 as necessary, and then cutting it to a desired size. Thereby, the pattern phase difference film 1 is efficiently mass-produced by continuously processing the base material 2 provided by the roll by transferring the concavo-convex shape using the roll plate 20.

[Roll plate manufacturing process]
3 and 4 are diagrams showing a manufacturing process of the roll plate 20 which is a mold for manufacturing the pattern retardation film. 3 and 4, regions corresponding to the regions A and B of the pattern retardation film 1 are indicated by symbols ARA and ARB, respectively. In this manufacturing process, the peripheral side surface of the base material 40 is polished and smoothed (FIG. 3A). Subsequently, in this manufacturing process, the underlayer 41 is produced (FIG. 3A). Here, the base material 40 is a cylindrical metal material corresponding to the outer shape of the roll plate 20. The base material 40 is preferably a metal material from the viewpoint of ease of processing and dimensional stability, and more preferably nickel, chromium, stainless steel, copper, or the like. In this embodiment, the base material 40 is made of copper.

  The underlayer 41 is provided to reinforce the adhesion to the base material 40 with respect to the material layer provided on the upper layer. In this embodiment, the foundation layer 41 is formed with a thickness of 500 nm from a nickel layer doped with phosphorus by electroless plating.

Subsequently, in this step, the first inorganic material layer 42 is formed on the base layer 41. In this embodiment, a chromium layer is applied to the first inorganic material layer 42, and the first inorganic material layer 42 is produced by sputtering to a thickness of 100 nm. In addition, although various inorganic materials, such as a metal material, an inorganic oxide, an inorganic nitride, an inorganic carbide, can be widely applied to this 1st inorganic material layer 42, it is chromium, titanium from the ease of processing etc. , nickel, tungsten, stainless steel-based metallic material, _{aluminum, SiO 2, SiO x, Al} 2 O 3, Cr 2 O 3, TiO 2, Si 3 N 4, AlN, TiN, SiO x N y, SiC, WC, DLC Etc. can be applied.

  Subsequently, in this step, as shown in FIG. 3B, a fine line-shaped uneven shape is formed on the entire surface of the first inorganic material layer 42 in the first uneven shape forming step. Here, the line-shaped uneven shape is a minute uneven shape corresponding to the uneven shape of the right eye region of the alignment film 3. In this embodiment, the concavo-convex shape is produced by a rubbing process using a rubbing cloth. 3 and 4, the rubbing process is shown by the rubbing roll R for convenience.

  Subsequently, in this step, a mask 43 in which a region ARA corresponding to the right eye region A is covered with a resist material and a region ARB corresponding to the left eye region B is exposed with a resist material in the mask manufacturing step is manufactured (FIG. 3 (c)). That is, in this step, a positive resist agent is applied to the entire surface, and then exposed and developed to produce a mask that exposes the region ARB corresponding to the left-eye region B. The resist material is not particularly limited, and a negative resist material may be applied. In addition, various methods can be widely applied even in the coating method and the exposure method.

Subsequently, as shown in FIG. 4D, in the thin film manufacturing process, the second inorganic material layer 44 is formed on the entire surface. In this embodiment, a chromium layer having a thickness of 100 nm is formed by sputtering, and thereby the chromium layer is applied to the second inorganic material layer 44. The second inorganic material layer 44 can be widely applied to various inorganic materials such as a metal material, an inorganic oxide, an inorganic nitride, and an inorganic carbide. However, in terms of ease of processing, chromium, titanium, nickel, tungsten, stainless steel-based metallic material, _{aluminum, SiO 2, SiO x, Al} 2 O 3, Cr 2 O 3, TiO 2, Si 3 N 4, AlN, TiN, SiO x N y, SiC, WC, DLC , etc. Selected from.

  Subsequently, as shown in FIG. 4E, in the second concavo-convex shape manufacturing step, a direction different from the extending direction of the line-shaped concavo-convex shape in the first inorganic material layer 42 (in this embodiment, the first inorganic shape The entire surface is rubbed in a direction that forms an angle of 90 degrees with the rubbing direction in the material layer 42, and an uneven shape is produced on the surface of the second inorganic material layer (chrome layer) 44. Thereafter, as shown in FIG. 4F, in the manufacturing process, the mask 43 is removed together with the second inorganic material layer 44, which is an upper layer, in a subsequent resist removing process. Thus, in this manufacturing process, the concavo-convex shape corresponding to the regions A and B of the alignment film 3 is prepared by two concavo-convex shape manufacturing processes, and the roll plate 20 is manufactured.

[Rubbing process]
By the way, when the rubbing process in the roll plate manufacturing process described above was examined in detail, it was found that the surface shape of the rubbing process target was gradually flattened by repeating the rubbing process.

  That is, FIG. 5, FIG. 6, and FIG. 7 are photographs obtained by photographing the surface shape of the object to be rubbed while sequentially increasing the magnification. 5 (a), 6 (a), and 7 (a) show an example in which an underlayer of a nickel layer doped with phosphorus with a film thickness of 500 nm is formed on the polished copper surface by electroless plating. A titanium layer having a film thickness of 100 nm was prepared by sputtering. 5 (b), 6 (b) and 7 (b) rub the surface of the titanium layer according to FIGS. 5 (a), 6 (a) and 7 (a) with a constant pressing force. It is the result of rubbing treatment in a state of being pressed with a cloth, and the horizontal direction is the rubbing direction. The number of rubbing is 3000 times. 5 (c), 6 (c), and 7 (c), the number of rubbing processes is 5000 times under the same conditions as in FIGS. 5 (b), 6 (b), and 7 (b). This is the result of setting.

  According to FIG. 5, FIG. 6, and FIG. 7, when no rubbing treatment is performed, the surface is covered with a grain boundary of titanium, and thereby the uneven shape due to the grain boundary of titanium appears on the surface. I understand. However, as the number of times of rubbing increases, deformation is observed in the surface shape as if the grain boundaries are stretched, and the surface is observed to be flat as a whole. As a result, according to FIGS. 5, 6, and 7, it appears that the uneven shape due to the metal grain boundary is gradually flattened by the rubbing process.

  Based on the assumption that the surface shape of the object to be rubbed is gradually flattened by repeating the rubbing process as described above, as a result of examining the adhesion force with the polymerizable liquid crystal material due to the surface shape of the object to be rubbed, the average surface roughness It was found that it is necessary to secure (Ra) of 1 nm or more. Thus, it was found that the number of rubbing treatments should be limited to a certain number or less from the viewpoint of enhancing the adhesion.

  However, if the number of rubbing treatments is reduced, there is a possibility that sufficient alignment regulating force cannot be applied to the alignment film 3. That is, the concavo-convex shape used for the alignment of the retardation layer is so fine that it cannot be seen in FIGS. 5 to 7, and the alignment regulating force increases as the number of rubbing treatments increases. The relationship between the number of rubbing treatments and the orientation regulating force was examined from the viewpoint of securing sufficient orientation regulating force. When rubbing treatment was performed until the average surface roughness (Ra) was 4 nm or less, sufficient orientation regulating force was secured. I found that I can do it.

  The average surface roughness (Ra) is, of course, determined by preparing the alignment film 3 by a molding process using a rubbing mold and examining the adhesion between the alignment film 3 and the polymerizable liquid crystal material. In addition, the orientation regulation power was examined. The average surface roughness (Ra) is an arithmetic average roughness defined in the standard JIS B 0601: 2001, and is measured in a direction orthogonal to the rubbing direction.

  Accordingly, it has been found that it is necessary to set the number of rubbing treatments so that the average surface roughness (Ra) is 1 nm or more and 4 nm or less in the alignment film 3. Here, in this type of molding process, the surface shape of the molding die can be sufficiently transferred, so that the average surface roughness can be obtained even on the peripheral side surface of the roll plate 20 that is the molding die. It is necessary to set the number of rubbing treatments so that the thickness (Ra) is 1 nm or more and 4 nm or less. In the rubbing treatment, the relationship between the number of rubbing treatments and the change in surface roughness changes depending on the rubbing treatment conditions such as the pressing force of the rubbing cloth. Therefore, when the average roughness (Ra) is set in the above range, the number of rubbing treatments needs to be appropriately selected according to the rubbing treatment conditions.

  FIG. 8, FIG. 9, and FIG. 10 are photographs specifically showing the surface shape of the alignment film when a pattern retardation film is produced by the manufacturing process of this embodiment. FIG. 8 shows the case where the number of rubbing treatments is small and the adhesion force can be sufficiently secured, but the orientation regulating force is insufficient. FIG. 8A shows the surface shape of the right eye region A shaped by the first inorganic material layer 42, and FIG. 8B shows the left eye shape shaped by the second inorganic material layer 44. This is the surface shape of region B. In FIGS. 8A and 8B, the first and second arrows indicate the rubbing directions in FIGS. 3B and 4E. In FIG. 8B, rubbing marks formed on the surface of the lower first inorganic material layer 42 appear on the surface of the second inorganic material layer 44 that is the upper layer.

  FIG. 9 shows a case where both the adhesion force and the orientation regulating force can be sufficiently secured. This is a case where the number of rubbing treatments is increased as compared with the example shown in FIG. 9 (a) and 9 (b) are photographs corresponding to FIGS. 8 (a) and 8 (b), respectively. FIG. 10 shows the case where the number of rubbing treatments is further increased as compared with the case of FIG. 9, and the alignment regulating force can be sufficiently secured, but the adhesion force is insufficient. 10 (a) and 10 (b) are photographs corresponding to FIGS. 8 (a) and 8 (b), respectively.

  11, FIG. 12, and FIG. 13 are diagrams showing the measurement results of the surface shapes of the parts shown in FIG. 8, FIG. 9, and FIG. 10, respectively. 11 to 13 show measurement results in a direction orthogonal to the rubbing direction, and (a1) and (a2) are surface shapes of the right eye region A formed by the first inorganic material layer 42. Yes, (b1) and (b2) are the surface shapes of the region for the left eye shaped by the second inorganic material layer 44. In the measurement results of FIGS. 11 (a1) and (a2), the average surface roughness (Ra) is 4.5 nm, and in the measurement results of FIGS. 11 (b1) and (b2), the average surface roughness (Ra) is It was 4.5 nm. Also. In the measurement results of FIG. 12, the average surface roughness (Ra) of the first inorganic material layer 42 and the second inorganic material layer 44 was 2.0 nm and 1.8 nm, respectively. Moreover, in the measurement result of FIG. 13, the average surface roughness (Ra) of the 1st inorganic material layer 42 and the 2nd inorganic material layer 44 was 0.85 nm and 0.71 nm, respectively. 8 to 13 also show that the average surface roughness (Ra) of the alignment film 3 is set to 1 nm or more and 4 nm or less to effectively avoid the deterioration of the alignment in the liquid crystal layer, compared with the conventional case. Thus, it was found that the adhesion between the alignment film and the liquid crystal layer can be improved.

  14 (a) and 14 (b) are photographs showing a cross section of the pattern retardation film. FIGS. 14A and 14B are photographs of different portions when the uneven shape is appropriately created. In the pattern retardation film used for the photography of FIG. 14, an acrylic resin is applied to the shaping resin layer 5, and the embedding resin is the resin layer of the retardation layer 4. Moreover, the description arrange | positioned in the part of this embedding resin shows typically the uneven | corrugated shape grasped | ascertained by the measurement of the surface shape. According to FIG. 14, when the boundary between the retardation layer (acrylic resin) and the embedding resin indicated by arrows at both ends is observed in detail, the uneven shape corresponding to the surface shape measurement result of FIG. 12 can be grasped. it can.

  According to the above configuration, since the average surface roughness (Ra) of the alignment film is set to 1 nm or more and 4 nm or less, deterioration of alignment in the retardation layer that is a liquid crystal layer can be effectively avoided, compared with the conventional case. Thus, the adhesion between the alignment film and the liquid crystal layer can be improved.

[Second Embodiment]
In the image display device according to this embodiment, a polarizing plate, a half-wave plate, and a quarter-wave plate are sequentially arranged on the panel surface of the liquid crystal display panel to improve the viewing angle characteristics of the liquid crystal display panel. FIG. 15 is a perspective view showing a quarter-wave plate disposed on the panel surface. The half-wave plate is configured the same as the quarter-wave plate shown in FIG. 15 except that the thickness of the retardation layer and the direction of the slow axis, which will be described later, are different. Detailed description will be omitted.

  Here, in the quarter-wave plate 51, an alignment film 53 and a retardation layer 54 are sequentially formed on one surface of a substrate 52 made of a transparent film such as TAC (triacetyl cellulose). The quarter-wave plate 51 is formed of a liquid crystal material that is solidified (cured) in a state in which the retardation layer 54 retains the refractive index anisotropy, similarly to the pattern retardation film 1, and the orientation of the liquid crystal material is changed. Patterning is performed by the alignment regulating force of the alignment film 53, thereby giving a phase difference corresponding to the transmitted light. The quarter-wave plate 51 is formed with an alignment film 53 with the same surface shape of the ultraviolet curable resin 55 as the pattern retardation film 1, and the entire surface of the alignment film 53 is uniformly perpendicular to the vertical direction. It is produced by a line-shaped uneven shape extending in a slanting direction.

  The quarter-wave plate 51 is produced in the same process as the process for manufacturing the pattern retardation film 1 described above with reference to FIG. 2 using a roll plate that is a dedicated manufacturing mold. Thereby, the quarter-wave plate 51 and the half-wave plate are efficiently mass-produced.

  FIG. 16 is a diagram illustrating a manufacturing process of a roll plate used for manufacturing the quarter-wave plate 51. In this manufacturing process, after the peripheral side surface of the base material 60 is smoothed by cutting, the base layer 61 is manufactured (FIG. 16A). Here, the base material 60 is a cylindrical metal material corresponding to the outer shape of the roll plate, and various metal materials and the like can be widely applied in the same manner as described above for the pattern retardation film 1. In form, copper is applied. The underlayer 61 is made of phosphorus-doped nickel layer with a film thickness of 500 nm by electroless plating.

  Subsequently, in this step, an inorganic material layer 62 is formed on the surface of the base layer 61. In this embodiment, a chromium layer is applied to the inorganic material layer 62, and the inorganic material layer 62 is produced by sputtering to a thickness of 100 nm. Subsequently, in this step, as shown in FIG. 16B, a fine line-shaped uneven shape is formed on the entire surface of the inorganic material layer 62 by rubbing. In this embodiment, the transmission axis of the polarizing plate disposed on the panel surface of the liquid crystal display panel and the slow axis of the half-wave plate and quarter-wave plate are 75 degrees and 15 degrees clockwise, respectively. The extending direction of the line-shaped concavo-convex shape coincides with the extending direction of the slow axis. Thereby, in the quarter-wave plate 51, the surface shape of the inorganic material layer 62 is transferred by the shaping process, and the alignment film 53 is produced.

  In this embodiment, by setting the number of rubbing treatments in the inorganic material layer 62, the average surface roughness (Ra) is set to 1 nm or more and 4 nm or less in the direction orthogonal to the rubbing direction. In the alignment film 53 for transferring the surface shape of the inorganic material layer 62, the average surface roughness (Ra) was set to 1 nm or more and 4 nm or less. Thereby, also in this embodiment, the deterioration of the alignment in the liquid crystal layer is effectively avoided, and the adhesion between the alignment film and the liquid crystal layer is improved as compared with the conventional case.

  According to the second embodiment, the same effect as that of the first embodiment can be secured by applying the present invention to the ½ retardation plate and the ¼ retardation plate.

[Third Embodiment]
By the way, on the premise of the configurations of the first and second embodiments described above, further investigation was made on the surface roughness of the alignment film. FIG. 17 is a diagram showing a configuration of a measuring apparatus used for examining the alignment film. In this measuring apparatus, the pattern phase difference film 1 is arrange | positioned between polarizing plates 70A and 70B by orthogonal Nicol arrangement. In this state, the amount of transmitted light is measured while changing the inclination θ of the pattern retardation film 1 with respect to the polarizing plates 70A and 70B, and the inclination θ with the smallest amount of transmitted light is measured. The light amount when the transmitted light amount is the smallest is also called black luminance. In this embodiment, with respect to one pattern retardation film 1, the amount of black luminance and the inclination related to black luminance were measured at a plurality of locations, and the measurement results were statistically processed. In addition, the rubbing process which concerns on this measurement was performed by the pushing amount of 0.5 mm using the flocking cloth which used the rayon. Moreover, the pattern phase difference film 1 was created with the test metal mold | die produced by affixing the sample for a measurement on the surrounding side surface of the base material 40. FIG.

  18 and 19 are diagrams showing the measurement results. The measurement results in FIG. 18 show the rubbing time on the horizontal axis and the variation 3σ of the inclination θ on the vertical axis. Note that σ is a standard deviation. The measurement result indicated by reference sign L1 is a measurement result when the displacement speed of the rubbing cloth with respect to the base material during the rubbing process is set to five times that of the measurement result indicated by reference sign L2. According to the measurement result shown in FIG. 18, it was found that the variation 3σ of the angle θ related to the black luminance is smaller as the displacement speed of the rubbing cloth relative to the base material is lower and the rubbing processing time is shorter. In particular, when the processing time is shorter than a certain time, it can be seen that the variation 3σ is rapidly reduced.

  FIG. 19 shows the black luminance on the horizontal axis and the variation 3σ of the inclination θ by the vertical axis. The unit of the horizontal axis is candela, which is the amount of transmitted light when irradiated with light for measurement with a constant amount of light. According to FIG. 19, it can be seen that the smaller the variation 3σ is, the smaller the black luminance is. In particular, when the variation 3σ becomes smaller than about 1.0 degree of the variation 3σ, the amount of change in black luminance with respect to the variation 3σ becomes smaller. The change in the measurement result at the boundary of 1.0 degree of the variation 3σ can also be seen in the measurement result of FIG.

  Here, when the variation 3σ is small, or when the black luminance is small, it can be said that the variation in the amount of retardation applied by the pattern retardation film 1 is small. In the pattern retardation film 1, the image display panel has high accuracy. The emitted light can be converted into circularly polarized light having different directions for the right eye and the left eye. Therefore, crosstalk can be sufficiently suppressed. Moreover, when applied to a 1/2 phase difference plate and a 1/4 phase difference plate, a desired phase difference can be given with high accuracy.

  In order to create a retardation layer with high accuracy, it is necessary to set the relative speed between the base material and the rubbing cloth to a constant speed or less and perform rubbing processing in a short processing time. It was found that rubbing treatment was necessary based on a concept opposite to the concept. Thus, when the rubbing process is performed in a short time with the relative speed set to a certain speed or less, it is considered that the line-shaped uneven shape is not formed with a sufficient depth.

  20 and 21 show the results of measuring the relationship between the surface shape of the alignment film and the variation 3σ from such a viewpoint. In addition, this measurement result measured the surface shape of the alignment film in the stage before apply | coating an ultraviolet curable resin about the pattern phase difference film used for the measurement of FIG.18 and FIG.19. FIG. 20 shows a measurement result in which the root mean square roughness RMS (Rq) is taken on the horizontal axis and the variation 3σ is taken on the vertical axis. According to the measurement result of FIG. 10, when the variation 3σ is small, it can be seen that the roughness due to the mean square roughness is small, but the measurement result of FIGS. 18 and 19 is 1.0 degree of the variation 3σ described above. Such boundaries cannot be seen.

  On the other hand, FIG. 21 shows measurement results in which the ten-point average roughness Rz is plotted on the horizontal axis and the variation 3σ is plotted on the vertical axis. 20 and 21, according to the measurement results of FIG. 20 and FIG. 21, as the surface roughness is rough, that is, as the line-shaped unevenness shape related to the alignment film is formed with a sufficient depth, the optical characteristics related to the retardation layer. It turns out that deteriorates. In other words, it can be said that the shallower the line-shaped unevenness of the alignment film, the easier it is to align the liquid crystal molecules in the retardation layer.

  Further, according to the measurement results of FIG. 21, in comparison with the measurement results of FIGS. 18 and 19, if rubbing is performed so that the ten-point average roughness Rz is 45 nm or less, the variation 3σ is 1.2 degrees. It can be seen that the rubbing process can be performed as described below, and the black luminance can be sufficiently suppressed. Note that the lower limit of the ten-point average roughness needs to be about 10 times the size of the liquid crystal molecules applied to the retardation layer, and thus needs to be 1 nm or more. However, from the viewpoint of securing a practical margin, the lower limit is preferably 10 nm or more.

  It has been found that the alignment film needs to have a ten-point average roughness Rz of 45 nm or less and 10 nm or more in order to sufficiently reduce the variation and sufficiently align the liquid crystal layer. Accordingly, in this embodiment, on the premise of the configuration of the first and second embodiments, the ten-point average roughness Rz is set to be 45 nm or less and 10 nm or more by setting the number of rubbing processes and the rubbing process speed. did. Further, in this embodiment, the ten-point average roughness Rz of the peripheral side surface of the roll plate is prepared to be 45 nm or less and 10 nm or more.

  FIGS. 22 and 23 are photographs taken by AFM (Atomic Force Microscope) showing the surface shape of the 5 μm × 5 μm region of the alignment film subjected to the measurement of FIGS. Is the rubbing direction. FIG. 22 is based on a sample that falls within the above-described range, and a weak line-shaped uneven shape is created to such an extent that the rubbing direction can be barely seen. FIG. 23 is based on an excessively rubbed sample that does not fall within the above-described range, and the variation 3σ and the black luminance are still insufficient. According to FIGS. 22 and 23, it can be seen that the optical characteristics related to the retardation layer deteriorate as the line-shaped unevenness shape related to the alignment film is formed with a sufficient depth. It can be seen that the shallower the concavo-convex shape is, the easier it is to align the liquid crystal molecules applied to the retardation layer.

  According to the third embodiment, when the ten-point average roughness Rz of the alignment film is 45 nm or less and 10 nm or more, the liquid crystal layer can be aligned with sufficiently reduced variation, thereby achieving high quality. Pattern retardation film and retardation plate can be produced. Further, according to the comparison with the ten-point average roughness Rz based on the measurement results of FIGS. 11 (a1) to 12 (b2), when the ten-point average roughness Rz is 45 nm or less and 10 nm or more, the alignment is generally performed. Since the average surface roughness (Ra) of the film can be set to 1 nm or more and 4 nm or less, it is possible to effectively avoid the deterioration of the alignment in the retardation layer that is the liquid crystal layer, and the alignment film and the liquid crystal layer are compared with the conventional one Adhesion can be improved.

[Fourth Embodiment]
In this embodiment, in the configuration of the above-described third embodiment, the ten-point average roughness Rz of the alignment film is 45 nm or less and 10 nm or more by further setting the number of rubbing processes and the rubbing process speed, and the alignment film The average surface roughness (Ra) is set to 1 nm or more and 4 nm or less. In this embodiment, the ten-point average roughness Rz of the peripheral side surface of the roll plate is 45 nm or less and 10 nm or more, and the average surface roughness (Ra) is 1 nm or more and 4 nm or less.

  In this embodiment, the ten-point average roughness Rz of the alignment film is 45 nm or less, 10 nm or more, and the average surface roughness (Ra) of the alignment film is set to 1 nm or more and 4 nm or less. The liquid crystal layer can be aligned with a reduced amount, and the deterioration of the alignment in the liquid crystal layer can be effectively avoided, and the adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case.

[Fifth Embodiment]
FIG. 24 is a diagram showing an image display apparatus according to the fifth embodiment of the present invention. In the image display device 71, an optical film 73 is disposed on the panel surface of the image display panel 72. The image display panel 72 is an organic EL panel having a flexible sheet shape, and displays a desired color image. The optical film 73 suppresses reflection of extraneous light arriving at the image display panel 72 by controlling the polarization plane.

  For this reason, the optical film 73 is configured by a laminate of a linearly polarizing plate 75 and a circularly polarizing plate 76, and an adhesive layer 74 made of a pressure sensitive adhesive is provided on the side surface of the image display panel 72. Affixed to the panel surface and held.

  The optical film 73 converts extraneous light traveling toward the panel surface of the image display panel 72 into linearly polarized light by the linearly polarizing plate 75 and then converts it into circularly polarized light by the circularly polarizing plate 76. Here, the extraneous light by the circularly polarized light is reflected by the surface of the image display panel 72 and the like, but the rotation direction of the polarization plane is reversed at the time of this reflection. As a result, the reflected light is converted from the circularly polarizing plate 76 to linearly polarized light in the direction shielded by the linearly polarizing plate 75, and then shielded by the subsequent linearly polarizing plate 75, as a result. The emission to the outside is remarkably suppressed by controlling the polarization plane.

  In this embodiment, the circularly polarizing plate 76 includes a portion 77 (referred to as a half-wave plate retardation layer) that functions as a ½ retardation plate and a portion 78 (1 that functions as a ¼ retardation plate). / 4 wavelength plate retardation layer). As shown in FIG. 25, the half-wave plate retardation layer 77 and the quarter-wave plate retardation layer 78 have a slow axis (respectively, respectively) with respect to the transmission axis of the linear polarizing plate 75 indicated by the arrow. Are arranged so as to form angles of 15 degrees and 73 degrees counterclockwise, respectively. Accordingly, the image display device 71 ensures positive dispersion characteristics in a wide wavelength band used for displaying a color image, and sufficiently suppresses reflection of external light.

  More specifically, the quarter-wave plate retardation layer 78 is formed with an in-plane retardation (Re) of 125 nm or more and 150 nm or less, and the half-wave plate retardation layer 77 is formed with an in-plane retardation (Re) Re) is created when 235 nm or more and 285 nm or less. Thereby, the optical film 73 emits the transmitted light in the visible light wavelength range (450 to 750 nm) incident from the linearly polarizing plate 75 side as circularly polarized light having an ellipticity of 0.8 or more.

  Here, the circularly polarizing plate 76 (FIG. 24) is arranged on the lower surface side of the base material 79 made of a transparent film such as TAC (triacetyl cellulose) in order, for a quarter-wave plate alignment film 81 and for a quarter-wave plate. A retardation layer 78 is provided, and an adhesive layer 74 is provided on the side surface of the image display panel 72 of the quarter-wave plate retardation layer 78. The quarter-wave plate retardation layer 78 is formed of a liquid crystal material that is solidified (cured) while maintaining refractive index anisotropy, and the circularly polarizing plate 76 has an alignment of the liquid crystal material of ¼ wavelength. Patterning is performed by the alignment regulating force of the plate alignment film 81. In the circularly polarizing plate 76, a molding resin, which is a resin used for forming a fine uneven shape, is applied to the surface of the base material 79, and a fine uneven shape is produced by the forming process of the forming resin. Is done. In the circularly polarizing plate 76, an ultraviolet curable resin is applied to the shaping resin, and after the ultraviolet curable resin 82 is applied to the surface of the base material 79, a minute amount is formed on the surface of the ultraviolet curable resin 82. An uneven shape is formed, and the quarter-wave plate alignment film 81 is formed by this minute uneven shape. In addition, about this ultraviolet curable resin 82, various resin used for a shaping process, such as an acrylic type, can be applied widely.

  The circularly polarizing plate 76 is provided with a half-wave plate alignment film 80 and a half-wave plate retardation layer 77 in this order on the upper surface side of the substrate 79. The half-wave plate retardation layer 77 is formed of a liquid crystal material that is solidified (cured) while maintaining the refractive index anisotropy. Patterning is performed by orientation regulation force. Similar to the alignment film 81 for the quarter-wave plate, the circularly polarizing plate 76 has a minute uneven shape on the surface of the ultraviolet curable resin 83 by the molding process using the ultraviolet curable resin 83 which is a molding resin. The half-wave plate alignment film 80 is formed by this minute uneven shape.

  Here, the fine concavo-convex shape relating to the alignment film for half-wave plate 80 and the alignment film for quarter-wave plate 81 is formed by a line-shaped concavo-convex shape extending in one direction. Are formed so as to form angles of 15 degrees and 73 degrees counterclockwise with respect to the transmission axis of the linearly polarizing plate 75, respectively.

  In the linear polarizing plate 75, the lower surface side of a base material 85 made of a transparent film such as TAC (triacetyl cellulose) is saponified, and then an optical functional layer 86 and an adhesive layer 87 are sequentially arranged. It is integrated with the plate 76. Here, the optical functional layer 86 is a part having an optical function as a linear polarizing plate, and is produced, for example, by adsorbing and orienting iodine compound molecules on a film material made of polyvinyl alcohol (PVA). The adhesive layer 87 is, for example, PVA (polyvinyl alcohol) glue.

  Thus, for each component on the side of the circularly polarizing plate 76 in the optical film 1, a film material having a thickness of about 30 μm can be applied to the base material 79, and a quarter-wave plate retardation layer 78, a half-wave plate The retardation layer 77 can be formed with a thickness of about 1 μm and 2 μm, respectively. The ultraviolet curable resins 82 and 83 can be formed with a thickness of about 2 μm, and the adhesive layer 74 can be formed with a thickness of 15 μm or less. Thus, the circularly polarizing plate 76 can be formed with a thickness of about 50 μm as a whole. The linear polarizing plate 75 can be formed with a total thickness of the optical functional layer 86 and the substrate 85 of about 30 μm, and the adhesive layer 87 can be formed with a thickness of 20 μm or less. Thereby, even if it exists in the linearly-polarizing plate 75, thickness can be made thin enough. Accordingly, the optical film 73 can ensure sufficient flexibility. When an ultraviolet curable resin is applied to the adhesive layer 87, the thickness can be about 100 nm, and the overall thickness can be further reduced.

  Here, in the image display panel 72 according to this embodiment, the optical film 73 has much more flexibility than the image display panel 72 due to the sheet shape having flexibility. It can be said that. However, in this type of optical film 73, it is predicted that the optical film 73 is disposed on a member having a significantly large curvature other than the image display panel. In this case, further flexibility is required.

  Therefore, the optical film 73 and the circularly polarizing plate 76 were tested for bending resistance by a cylindrical mandrel test defined in JIS K5600-5-1. According to the test results, in both the optical film 73 and the circularly polarizing plate 76, the mandrel has a diameter of 3 mm, and the surface is free from cracks and peeling, and further, the film is not bent. That was confirmed. As a result, it was found that the bending resistance test with the diameter of 3 mm was satisfied. Here, in the case of having such a degree of bending resistance, even if the arrangement target is an image display panel having a flexible sheet shape, the flexibility of the arrangement target is not sufficiently impaired. I was able to confirm. Even if the object to be arranged is a member having a much larger curvature, the optical film 73 can be arranged without being damaged.

  In this embodiment, the alignment film 80 for half-wave plates and the alignment film 81 for quarter-wave plates produced on both surfaces of the base material 79 in this way are roll plates similar to those in the above-described embodiment. It is produced by the used shaping process. In addition, one or both of the roll plates related to this shaping treatment are produced so that the ten-point average roughness Rz of the peripheral side surface is 45 nm or less and 10 nm or more. One or both of the plate alignment films 81 are produced so that the ten-point average roughness Rz is 45 nm or less and 10 nm or more.

  In this embodiment, the present invention is applied to a circularly polarizing plate according to a laminated structure of a ½ retardation plate and a ¼ retardation plate, and further, by controlling the polarization plane by laminating this circularly polarizing plate and a linearly polarizing plate. By applying to one or both of the alignment film for half-wave plates and the alignment film for quarter-wave plates, the ten-point average roughness Rz is 45 nm or less and 10 nm or more by applying to an optical film for preventing reflection. The same effects as those of the above-described embodiment can be obtained with respect to these circularly polarizing plates and optical films.

  Further, by applying to one or both of these circularly polarizing plates and optical film molds, the ten-point average roughness Rz is set to 45 nm or less and 10 nm or more, thereby relating to these circularly polarizing plates and optical films. With respect to the mold, the same effect as the above-described embodiment can be obtained.

[Sixth Embodiment]
FIG. 26 is a diagram showing an image display device according to the sixth embodiment of the present invention in comparison with FIG. In FIG. 26, the same components as those of the image display device 71 of FIG. 24 are denoted by the corresponding reference numerals, and redundant description is omitted. Here, the image display device 91 is configured in the same manner as the image display device 71 according to the fifth embodiment except that an optical film 93 is disposed instead of the optical film 73. The optical film 93 is configured in the same manner as the optical film 73 except that a circularly polarizing plate 96 is provided instead of the circularly polarizing plate 76.

  In the optical film 93, a half-wave plate retardation layer 77 and a quarter-wave plate retardation layer 78 are sequentially provided on the side surface of the image display panel 72 of the base material 79. The linearly polarizing plate 75 is provided by the adhesive layer 87. Here, in the optical film 93, the alignment film 80 for half-wave plates is formed by the molding process of the ultraviolet curable resin 83, and the liquid crystal material is aligned by the alignment regulating force of the alignment film 80 for half-wave plates. In this state, the half-wave plate retardation layer 77 is cured. Subsequently, after the ultraviolet curable resin 82 is applied, a quarter wavelength plate alignment film 81 is formed by a molding process of the ultraviolet curable resin 82. Further, the quarter-wave plate retardation layer 78 is formed by curing in a state where the liquid crystal material is oriented by the orientation regulating force of the quarter-wave plate orientation film 81.

  In this embodiment, one or both of the alignment film for half-wave plate 80 and the alignment film for quarter-wave plate 81 have a ten-point average roughness Rz of 45 nm or less in the same manner as described above for the fifth embodiment. It is made to be 10 nm or more. Correspondingly, one or both of the roll plates related to the shaping process of the alignment film 80 for half-wave plates and the alignment film 81 for quarter-wave plates has a 10-point average roughness Rz of 45 nm or less, 10 nm. As described above.

  As in this embodiment, even if the retardation layer 77 for half-wave plates and the retardation layer 78 for quarter-wave plates are sequentially formed on one surface of the base material 79, the first Effects similar to those of the fifth embodiment can be obtained.

[Seventh Embodiment]
FIG. 27 is a diagram showing an image display apparatus according to the eighth embodiment of the present invention in comparison with FIG. 24 and FIG. In the image display device 101, the optical film 103 is disposed on the panel surface of the image display panel 72. This embodiment has the same configuration as that of the fifth or sixth embodiment except that the configuration of the optical film 103 is different. In addition, in this optical film 103, the same structure as FIG. 24, FIG. 26 is attached | subjected and shown, and the overlapping description is abbreviate | omitted.

  The optical film 103 is configured by laminating a linearly polarizing plate 75 and a circularly polarizing plate 76 with an adhesive layer 87 interposed therebetween, and is held on the image display panel 72 by the adhesive layer 74. The circularly polarizing plate 76 is, from the image display panel 72 side, a quarter-wave plate shaping resin layer 82, a quarter-wave plate alignment film 81, a quarter-wave plate retardation layer 78, and a half wavelength. A plate-forming resin layer 83, a half-wave plate alignment film 80, and a half-wave plate retardation layer 77 are sequentially provided. Thereby, this optical film 103 is directly applied to the linear polarizing plate 75, the quarter-wave plate shaping resin layer 82, the quarter-wave plate retardation layer 78, the half-wave plate shaping resin layer 83, The half-wave plate retardation layer 77 is provided, and thereby, the fifth embodiment is further reduced in thickness as compared with the optical film 73 to further increase flexibility.

  The circularly polarizing plate 76 is produced by a molding process in the same manner as described above for the above-described embodiment in which one or both of the quarter-wave plate alignment film 81 and the half-wave plate alignment film 80 are formed. The roll plate to be subjected to the shaping process is prepared so that the ten-point average roughness Rz is 45 nm or less and 10 nm or more, whereby one or both of the alignment film 80 for half-wave plates and the alignment film 81 for quarter-wave plates are formed. The ten-point average roughness Rz is made to be 45 nm or less and 10 nm or more.

  The circularly polarizing plate 76 includes a quarter-wave plate shaping resin layer 82, a quarter-wave plate orientation film 81, a quarter-wave plate retardation layer 78, and a half-wave plate shaping resin layer. 83, the transfer method is applied to the process of integrating the alignment film 80 for half-wave plate and the retardation layer 77 for half-wave plate into the linearly polarizing plate 75.

  Here, in the transfer method, for example, when a desired layer is formed on a base material, the layer is not directly formed on the base material, but can be peeled once on a releasable support. After forming the transfer body by laminating the layers, the layer formed on the support is finally placed on the base material (transfer base material) on which the layer is to be laminated according to the process, demand, etc. In this method, a desired layer is formed on the substrate by bonding and laminating, and then peeling and removing the support.

  In this embodiment, the layer configuration related to the circularly polarizing plate 76 is laminated on the linearly polarizing plate 75 by a transfer method. Therefore, the substrate to be transferred is a linear polarizing plate 75, and the layer (transfer layer) used for transfer is a quarter-wave plate shaping resin layer 82, a quarter-wave plate alignment film 81, and a quarter wavelength. This is a laminate of a plate retardation layer 78, a half-wave plate shaping resin layer 83, a half-wave plate alignment film 80, and a half-wave plate retardation layer 77.

  FIG. 28 is a diagram showing a configuration of a transfer film as the transfer body. The transfer film 110 is formed on the support substrate 111 in sequence, the quarter-wave plate shaping resin layer 82, the quarter-wave plate alignment film 81, and the quarter-wave plate position according to the circularly polarizing plate 76. A retardation layer 78, a half-wave plate shaping resin layer 83, a half-wave plate alignment film 80, and a half-wave plate retardation layer 77 are provided.

  Here, the support substrate 111 detachably carries a layer (transfer layer) to be transferred, and after the transfer layer is bonded and laminated on the transfer substrate, it is appropriately peeled and removed as needed. It is a substrate. In this embodiment, a PET (Polyethylene terephthalate) film, which is a transparent film material, is applied, whereby the transfer film 110 is configured to be able to inspect optical characteristics. The PET film is corona-treated, thereby appropriately setting the adhesion between the PET film and a release layer described later. The support substrate 111 may have a sheet shape as a whole. The support substrate 21 may be a resinous film material made of a resin such as a polyester resin such as polyethylene terephthalate, polybutylene terephthalate, or polyethylene aphthalate, or a polyolefin resin such as polypropylene or polymethylpentene. When the peelability from the transfer layer is insufficient, the support substrate 21 is provided with a release layer that promotes peeling on the transfer layer side.

  For the release layer, it is possible to apply a material having relatively high adhesion to the support substrate 111 (low peelability) and low adhesion to the transfer layer (high peelability). In this embodiment, the lowermost layer of the transfer layer is a quarter-wave plate shaping resin layer 82 made of an ultraviolet curable resin. Polymer compound), fluorine-based resin, melamine resin, epoxy resin, or a mixture of these resins and other resins (acrylic resin, cellulose-based resin, polyester resin, etc.) as appropriate. In this embodiment, a release layer made of melamine resin is provided on the support substrate 21 made of the above-described PET film, and wettability with respect to the coating solution of the ultraviolet curable resin provided on the release layer is ensured.

  In this way, instead of providing a release layer made of melamine resin on a corona-treated PET film, a PET film that has not been surface-treated at all may be applied to a support substrate to omit the release layer. Alternatively, a release layer may be omitted by applying a TAC film without a so-called permeation layer called a nonsol to the support substrate. In this way, the configuration can be simplified.

  Incidentally, when the peelability by the release layer is insufficient, a release layer may be provided between the support substrate 111 and the release layer, and this release layer may supplement the release property by the release layer. . For the release layer, a material having relatively low adhesion to the support film (high peelability) and high adhesion to the release layer (low peelability) can be applied. More specifically, in this embodiment, the release layer includes an acrylic resin, a cellulose resin, a polyester resin, a urethane resin, a vinyl chloride-vinyl acetate copolymer, or a mixture of two or more selected from the above. Alternatively, a mixture of one or more selected from the above and other resins is used. The thickness of the release layer is usually about 1 to 10 μm. The release layer may be provided on the support substrate 111 or may be provided on the release layer.

  The quarter-wave plate shaping resin layer 82 is obtained by applying an ultraviolet curable resin coating solution on the support substrate 111 or on a release layer formed on the support substrate 111. The quarter-wave plate alignment film 81 is prepared by coating, and the quarter-wave plate alignment film 81 is formed by using a mold for molding (roll plate) in which fine irregularities for forming are formed on the peripheral side surface. The mold resin layer 82 is formed by a forming process. The quarter-wave plate retardation layer 78 is formed by applying a liquid crystal material on the quarter-wave plate alignment film 81 and curing it.

  The half-wave plate shaping resin layer 83 is applied on the quarter-wave plate retardation layer 78 in the same manner as the quarter-wave plate shaping resin layer 82 and is applied with an ultraviolet curable resin. The half-wave plate alignment film 80 is formed by using a molding die in the same manner as the quarter-wave plate alignment film 81. 83 is created by a shaping process. The half-wave plate retardation layer 77 is formed by applying and curing a liquid crystal material on the half-wave plate alignment film 80. Thus, in the transfer body, the quarter wavelength plate shaping resin layer 82, the quarter wavelength plate alignment film 81, the quarter wavelength plate retardation layer 78, which have the layer configuration related to these circularly polarizing plates, The half-wave plate shaping resin layer 83, the half-wave plate alignment film 80, and the half-wave plate retardation layer 77 are transfer layers used for transfer.

  Further, the transfer film 110 is provided with an adhesive layer 87 and a separator film 113 on the transfer layer according to the layer configuration of the circularly polarizing plate 76.

  Here, the adhesive layer 87 is a layer for adhering the transfer layer and the substrate to be transferred. Depending on the material of the transfer layer and the material of the substrate to be transferred, a material having high adhesion is applied to both. In this embodiment, cellulose (fiber) based resins such as acetyl cellulose (cellulose acetate), nitrocellulose (cellulose nitrate or nitrified cotton), cellulose acetate propionate, poly (meth) methyl acrylate, poly (meta) ) Acrylic resin such as butyl acrylate, methyl (meth) acrylate- (meth) butyl acrylate copolymer, methyl (meth) acrylate-styrene copolymer, urethane resin, polyester resin, vinyl chloride-vinyl acetate Materials such as polymers, ionomers, natural or synthetic rubbers are used. The thickness of the adhesive layer is about 1 to 30 μm. In addition, you may apply an ultraviolet curable resin to this adhesion layer 87, In this case, the whole thickness can be made still thinner.

  The separator film 113 is a release sheet that covers the surface of the adhesive layer 87 so that it can be released. The separator film 113 is provided to prevent the adhesive layer 87 from being exposed and causing unnecessary adhesion to unnecessary articles, and is peeled off and removed immediately before transfer.

  The optical film 103 peels the separator film 113 from the transfer film 110 to expose the adhesive layer 87, and after the transfer film 110 is bonded to the linearly polarizing plate 75 by the adhesive layer 87, the support substrate 111 is peeled off. Created. After that, an adhesive layer 74 and a separator film covering the adhesive layer 74 are sequentially provided and cut into a desired size, and then the separator film is peeled off in the step of incorporating into the image display panel to expose the adhesive layer 74. After that, the adhesive layer 74 is disposed on the image display panel. In this way, the separator film covering the adhesive layer 74 in the optical film 103 is finally peeled off from the optical film 103, thereby supporting the separator film according to the adhesive layer 74 in place of the support substrate 111 described above. You may make it apply to a body.

  According to the above configuration, even when the optical film 3 is created by applying a transfer method, the same effect as in the above-described embodiment can be obtained.

[Eighth Embodiment]
FIG. 29 is a cross-sectional view showing an image display apparatus according to the ninth embodiment of the present invention in comparison with FIG. This image display device 121 is configured in the same manner as the image display device of the eighth embodiment except that an optical film 123 is disposed instead of the optical film 103. The optical film 123 includes a quarter-wave plate shaping resin layer 82, a quarter-wave plate orientation film 81, a quarter-wave plate retardation layer 78, and a half-wave plate shaping resin layer 83. , Instead of the circularly polarizing plate 76 formed of the half-wave plate alignment film 80 and the half-wave plate retardation layer 77, the circular polarizing plate 76 to the quarter-wave plate shaping resin layers 82 and 1/4. The optical film 103 has the same configuration except that a circularly polarizing plate 126 having a configuration in which the wavelength plate alignment film 81 is removed is applied. As a result, in this embodiment, the quarter-wave plate shaping resin layer 82 is removed, so that the overall thickness can be further reduced to further ensure flexibility.

  FIG. 30 is a cross-sectional view showing a transfer film used for manufacturing the optical film 123 in comparison with FIG. In this transfer film 130, a quarter-wave plate retardation layer 78, a half-wave plate shaping resin layer 83, and a half-wave plate retardation layer 77 are assigned to the transfer layer, and the quarter wavelength plate A quarter-wave plate alignment film 81, which is the surface of the plate shaping resin layer 82, is assigned to the release layer.

  Specifically, in the quarter-wave plate shaping resin layer 82, the surface shape sufficiently functions as the quarter-wave plate orientation film 81, and the support is peeled off from the transfer layer. In addition, it is configured to sufficiently function as a release layer. Thereby, the quarter-wave plate shaping resin layer 82 is in a state in which the quarter-wave plate alignment film 81 is formed, and the adhesiveness of the support substrate 111 is high (the peelability is low). A material having low adhesion (high peelability) to the quarter-wave plate retardation layer 78 that is the lowermost layer is applied. Furthermore, a material having a sufficiently small adhesion with the quarter-wave plate retardation layer 78 is applied as compared with the adhesion between the other layers formed on the transfer film 130.

  The quarter-wave plate shaping resin layer 82, the quarter-wave plate retardation layer 78, the half-wave plate shaping resin layer 83, and the half-wave plate retardation layer 77 are molded. A material satisfying these conditions is selected from an ultraviolet curable resin used for the treatment and a liquid crystal material used for the optical film, or prepared and applied so as to satisfy these conditions.

  Instead of such selection and adjustment of each material, a release layer may be separately provided on the surface of the quarter-wave plate shaping resin layer 82. Further, when the peelability by the release layer is insufficient, a release layer may be provided on the support side of the release layer, and this release layer may supplement the peelability by the release layer.

  The transfer film 130 is prepared by a shaping process in the same manner as described above for the quarter-wave plate orientation film 81 and the half-wave plate orientation film 80 for the above-described embodiment, and is used for this shaping process. One or both of the roll plates are prepared so that the ten-point average roughness Rz is 45 nm or less and 10 nm or more, whereby one or both of the alignment film 80 for half-wave plates and the alignment film 81 for quarter-wave plates are sufficient. The point average roughness Rz is made to be 45 nm or less and 10 nm or more.

  According to this embodiment, even when an optical film having a laminated structure of a quarter-wave plate and a half-wave plate is produced by a transfer method, the ten-point average roughness Rz of the alignment film is 45 nm or less, 10 nm or more. Therefore, it is possible to align the liquid crystal layer with sufficiently reduced variation, thereby making it possible to produce a high quality optical film, a transfer film for production of this optical film, and further with a liquid crystal layer. By effectively avoiding the deterioration of the alignment in a certain retardation layer, the adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case.

[Ninth Embodiment]
In this embodiment, on the premise of the configuration of the fifth embodiment, the sixth embodiment, the seventh embodiment, or the eighth embodiment, the ten-point average roughness Rz of the alignment film is 45 nm or less, 10 nm or more, The average surface roughness (Ra) of the alignment film is set to 1 nm or more and 4 nm or less. Further, in this embodiment, the ten-point average roughness Rz of the peripheral side surface of the roll plate subjected to the shaping process is 45 nm or less and 10 nm or more, and the average surface roughness (Ra) is 1 nm or more and 4 nm or less. Is done.

  In this embodiment, even when an optical film having a laminated structure of a quarter-wave plate and a half-wave plate is produced by various methods, the ten-point average roughness Rz of the alignment film is 45 nm or less and 10 nm or more. In addition, by setting the average surface roughness (Ra) of the alignment film to 1 nm or more and 4 nm or less, the dispersion can be sufficiently reduced and the liquid crystal layer can be aligned, and the deterioration of the alignment in the liquid crystal layer is effective. Thus, the adhesion between the alignment film and the liquid crystal layer can be improved as compared with the conventional case.

[Other Embodiments]
The specific configuration suitable for the implementation of the present invention has been described in detail above. However, the present invention is not limited to the scope of the present invention, and various combinations of the above-described embodiments, and further the configuration of the above-described embodiments. Can be variously changed.

  That is, in the first embodiment described above, the case where the roll plate is produced by mask rubbing using a resist after the entire surface is rubbed has been described. Various techniques can be widely applied.

  In the above-described embodiment, the case where the alignment film is formed by the shaping process has been described. However, the present invention is not limited to this, and can be widely applied to the case where the alignment film is formed by the rubbing process of the polyimide film. .

  In the above-described embodiment, the case where the ultraviolet curable resin is applied to the shaping resin has been described. However, the present invention is not limited to this, and when various shaping resins other than the ultraviolet curable resin are applied, Can be widely applied to the case where a base material softened by heating or the like is pressed to form.

  In the above-described embodiment, the case where the present invention is applied to the pattern phase difference film and the phase difference plate has been described. However, the present invention is not limited to this, and various types of optical materials for producing an alignment film by other shaping processes. Can be widely applied in film production.

  Moreover, in the above-mentioned embodiment, although the case where various optical films were produced with a roll plate was described, this invention is not limited to this, It can apply widely also when producing with a flat plate.

  Further, in the first embodiment described above, the case where the use of the liquid crystal display panel is assumed has been described, but the present invention is not limited to this, and is widely applied to the case where the use of an organic EL panel or a plasma display panel is assumed. The present invention can also be widely applied to the case where the polarizing filter is provided integrally.

DESCRIPTION OF SYMBOLS 1 Pattern retardation film 2, 52, 79, 85 Base material 3, 53, 80, 81 Alignment film 4, 54, 77, 78 Retardation layer 5, 55, 82, 83 UV curable resin 10 Manufacturing process 11 Supply reel 12, 19 Die 14 Pressure roller 15, 17 Ultraviolet irradiation device 16 Peeling roller 18 Reel 20 Roll plate 40, 60 Base material 41, 61 Underlayer 42, 44, 62 Inorganic material layer 43 Resist layer 51 1/4 wavelength plate 70A 70B Polarizing plate 71, 91, 101, 121 Image display device 72 Image display panel 73, 93, 103, 123 Optical film 74, 87 Adhesive layer 75 Linear polarizing plate 76, 96, 126 Circular polarizing plate 86 Optical functional layer 87 Adhesive Layer 110, 130 Transfer film 111 Support base material 113 Separator film

Claims (16)

A substrate made of a transparent film;
An alignment film produced on one surface of the substrate;
A liquid crystal layer produced on the alignment film and aligned and solidified by the alignment regulating force of the alignment film;
The alignment film is
An optical film having a ten-point average roughness (Rz) of 10 nm or more and 45 nm or less. The alignment film is
The optical film according to claim 1, wherein the average surface roughness (Ra) is 1 nm or more and 4 nm or less. The liquid crystal layer is
A band-shaped right-eye region that gives a phase difference corresponding to light emitted from pixels of an image display panel driven by right-eye image data, and light emitted from pixels of the image display panel driven by left-eye image data The optical film of Claim 1 or Claim 2 with which the area | region for left eyes by the strip | belt shape which gives a corresponding phase difference was alternately provided. The optical film according to claim 1, wherein the liquid crystal layer imparts a phase difference of ½ wavelength or ¼ wavelength to transmitted light. A first substrate made of a transparent film;
A first alignment film produced on one surface of the first substrate;
A first liquid crystal layer produced on the first alignment film and aligned and solidified by the alignment regulating force of the first alignment film;
A second alignment film formed on the first liquid crystal layer;
A second liquid crystal layer produced on the second alignment film and aligned and solidified by the alignment regulating force of the second alignment film;
The first and second alignment films are
An optical film having a ten-point average roughness (Rz) of 10 nm or more and 45 nm or less. A substrate made of a transparent film;
A first alignment film produced on one surface of the substrate;
A first liquid crystal layer produced on the first alignment film and aligned and solidified by the alignment regulating force of the first alignment film;
A second alignment film produced on the other surface of the substrate;
A second liquid crystal layer produced on the second alignment film and aligned and solidified by the alignment regulating force of the second alignment film;
The first and second alignment films are
An optical film having a ten-point average roughness (Rz) of 10 nm or more and 45 nm or less. The first and second alignment films are
The optical film according to claim 5 or 6, wherein the average surface roughness (Ra) is 1 nm or more and 4 nm or less. A transfer layer having at least a liquid crystal layer that is aligned and solidified by the alignment regulating force of the alignment film;
A support for holding the transfer layer,
The alignment film is
The ten-point average roughness (Rz) is 10 nm or more and 45 nm or less. The alignment film is
The transfer body for optical films according to claim 8, wherein the average surface roughness (Ra) is 1 nm or more and 4 nm or less. The liquid crystal layer is
A liquid crystal layer for a ½ wavelength plate that imparts a phase difference of ½ wavelength to the transmitted light, and a liquid crystal layer for a ¼ wavelength plate that imparts a phase difference of a ¼ wavelength to the transmitted light,
The alignment film is
An alignment film for a half-wave plate according to the liquid crystal layer for the half-wave plate;
An alignment film for a quarter-wave plate according to the liquid crystal layer for a quarter-wave plate,
The transfer layer is
The liquid crystal layer for the half-wave plate, the alignment film for the half-wave plate, the liquid crystal layer for the quarter-wave plate, or the alignment film for the quarter-wave plate. The transfer body for optical films according to 9. The liquid crystal layer is
A liquid crystal layer for a ½ wavelength plate that imparts a phase difference of ½ wavelength to the transmitted light, and a liquid crystal layer for a ¼ wavelength plate that imparts a phase difference of a ¼ wavelength to the transmitted light,
The alignment film is
An alignment film for a half-wave plate according to the liquid crystal layer for the half-wave plate;
An alignment film for a quarter-wave plate according to the liquid crystal layer for a quarter-wave plate,
The transfer layer is
A laminate of the liquid crystal layer for half-wave plates, the alignment film for half-wave plates, and the liquid crystal layer for quarter-wave plates,
The optical film transfer body according to claim 8, wherein the support includes the alignment film for a quarter-wave plate. A substrate made of a transparent film;
An optical functional layer of a linearly polarizing plate that functions as a linearly polarizing plate;
The optical functional layer of the circularly polarizing plate that functions as a circularly polarizing plate is laminated,
The optical functional layer of the circularly polarizing plate is an optical functional layer formed by the transfer layer provided on the optical film transfer body according to any one of claims 8, 9, 10, and 11. Optical film. The optical film according to any one of claims 1, 2, 3, 4, 5, 6, 7, or 12 is disposed on a front side surface of an image display panel. Image display device. In the mold for manufacturing the optical film used for the production of the alignment film by shaping,
A mold for producing an optical film, wherein a ten-point average roughness (Rz) of a portion subjected to shaping is 10 nm or more and 45 nm or less. The mold for manufacturing an optical film according to claim 14, wherein an average surface roughness (Ra) of a portion subjected to the shaping is 1 nm or more and 4 nm or less. In the part to be subjected to the shaping,
A first region having a strip shape in which a line-shaped uneven shape is formed; and a second region having a band shape in which a line-shaped uneven shape having a different extension direction from the line-shaped uneven shape in the first region is formed; The mold for producing an optical film according to claim 14 or 15, wherein the molds are alternately and sequentially produced.