JP5974605B2 - Pattern retardation film and image display device - Google Patents

Description

  The present invention relates to a pattern retardation film applied to a three-dimensional image display by a passive method.

  In recent years, flat panel displays capable of three-dimensional display have been provided. Here, in order to perform three-dimensional display on a flat panel display, it is usually necessary to selectively provide a right-eye image and a left-eye image to the viewer's right eye and left eye in some manner. . As a method for selectively providing a right-eye image and a left-eye image, for example, a passive method is known. This passive three-dimensional display method will be described with reference to the drawings. FIG. 7 is a schematic diagram showing an example of a passive three-dimensional display using a liquid crystal display panel. In the example of FIG. 7, pixels that are consecutive in the vertical direction of the liquid crystal display panel are sequentially and alternately assigned to a right-eye pixel that displays a right-eye image and a left-eye pixel that displays a left-eye image. And driving with the image data for the left eye, thereby displaying the image for the right eye and the image for the left eye simultaneously. In this manner, the screen of the liquid crystal 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 in which the short side is vertical and the long side is horizontal. Will be.

  Furthermore, in the passive method, a pattern retardation film is placed on the panel surface of the liquid crystal display panel, and light emitted from the linearly polarized light from the right-eye and left-eye pixels is converted into circularly polarized light with different rotation directions for the right-eye and left-eye. To do. Therefore, in the pattern retardation film, two types of band-like regions in which the slow axis direction (direction in which the refractive index is maximum) are orthogonal to each other are sequentially formed corresponding to the setting of the region in the liquid crystal display panel. Thus, in the passive method, glasses equipped with corresponding polarizing filters are worn, and a right-eye image and a left-eye image are selectively provided to the viewer's right eye and left eye, respectively. 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. In the example of FIG. 7, the long side direction of the screen is shown as the horizontal direction in accordance with the name in the normal image display apparatus.

  This passive method can also be applied to a liquid crystal display device with a slow response speed, and can also display three-dimensionally with a simple configuration using a pattern retardation film and circularly polarized glasses.

  The pattern phase difference film according to this passive method requires a pattern-like phase difference layer that gives a phase difference to transmitted light corresponding to the allocation of pixels. With respect to this pattern retardation film, Patent Document 1 discloses a method for forming a retardation layer by forming a photo-alignment film with controlled alignment regulating force on a glass substrate and patterning the alignment of liquid crystals with this photo-alignment film. Is disclosed. Patent Document 2 discloses a method for forming a photo-alignment film in which a fine uneven shape is formed on the peripheral side surface of a roll plate by laser irradiation, and the uneven shape is transferred to control the alignment regulating force in a pattern shape. Has been.

  By the way, in the display device using the pattern phase difference film, when a white screen was displayed, as shown in FIG. 8, a band-like region OB having a brightness different from that of other portions was generated as if moire stripes were generated. . This strip-like region OB gives an unnatural impression to the viewer even when a general moving image is displayed. It is desired to prevent the occurrence of the band-like region OB having a different brightness as compared with such other parts.

JP 2005-49865 A JP 2010-152296 A

  The present invention has been made in view of such a situation, and in a passive image display device using a pattern retardation film, it is possible to prevent the occurrence of a band-like region having a brightness different from that of other portions. An object of the present invention is to provide a pattern retardation film, an image display device using the pattern retardation film, a mold for producing the pattern retardation film, and a method for producing the pattern retardation film.

  The present inventor has conducted extensive research to solve the above problems, and provided a fine uneven shape extending in a direction inclined obliquely to the longitudinal direction of the right eye region and the left eye region of the pattern retardation film. This led to the completion of the present invention.

    Specifically, the present invention provides the following.

(1) An alignment film and a retardation layer are sequentially provided on a substrate made of a transparent film material,
A phase difference corresponding to the light emitted from the image display panel is given in the retardation layer by the alignment regulating force of the alignment film,
The retardation layer is
A right eye region having a band shape that gives a phase difference corresponding to light emitted from the pixel of the image display panel driven by the right eye image data, and an output from the pixel of the image display panel driven by the left eye image data. The regions for the left eye with a band shape that gives a phase difference corresponding to the incident light are provided alternately in turn,
The alignment film is
Protrusions having a cross-sectional arc shape extending in a direction inclined obliquely with respect to the longitudinal direction of the right eye region and the left eye region are formed, and line-shaped uneven shapes corresponding to the right eye region and the left eye region are formed. Is formed.

  According to (1), the regularity of the right-eye region and the left-eye region is relaxed by the ridges extending in the obliquely inclined direction, and thereby, the band-like regions having different brightness compared to other regions. Occurrence can be prevented.

(2) In (1),
The angle of the extending direction of the ridges with respect to the longitudinal direction of the right eye region and the left eye region is an angle of 5 degrees or more and 30 degrees or less.

  According to (2), with a more specific configuration, it is possible to prevent the occurrence of a band-like region having different brightness compared to other parts.

  (3) In the image display device, the pattern retardation film described in (1) or (2) is disposed.

  According to (3), an image display device that can prevent the occurrence of a band-like region with different brightness compared to other parts is configured.

(4) On the surface of the base material, there is a line-shaped concavo-convex shape in which the extending direction is different from the first region by the band shape in which the line-shaped concavo-convex shape is produced and the line-shaped concavo-convex shape in the first region. The second region by the produced band shape is a mold for producing a pattern phase difference film produced alternately,
On the surface of the base material, cutting marks are formed by a cutting tool extending obliquely with respect to the longitudinal direction of the first and second regions, and the uneven shape of the first and second regions is formed. It is formed.

  According to (4), in the pattern phase difference film created using this production mold, a ridge extending in an obliquely inclined direction corresponding to the cutting trace is produced, and the right eye The regularity of the area for use and the area for the left eye is relaxed, thereby preventing the occurrence of a band-like area having different brightness as compared with other parts.

  (5) The angle of the extending direction of the cutting trace with respect to the longitudinal direction of the first and second regions is an angle of 5 degrees or more and 30 degrees or less.

  According to (5), with a more specific configuration, it is possible to prevent the occurrence of a band-like region having a different brightness compared to other parts.

(6) Manufacturing process of manufacturing mold for manufacturing manufacturing mold;
An alignment film production step of producing an alignment film on a substrate by a molding process using the production mold; and
A retardation layer preparation step of preparing a retardation layer on the alignment film,
The production process of the manufacturing mold is as follows:
A chamfering process for cutting the surface of the base material flatly;
On the surface of the base material, a line-shaped concavo-convex shape in which the extension direction is different from the first region by the band shape in which the line-shaped concavo-convex shape is produced and the line-shaped concavo-convex shape in the first region is produced A step of forming a concavo-convex shape to produce a line-shaped concavo-convex shape related to the alignment film so as to successively and alternately continue with the second region by the band shape
The surface exposure step includes
The surface of the base material is cut by displacing the bite relative to the base material in a direction inclined obliquely with respect to the longitudinal direction of the first and second regions.

  According to (6), in the pattern phase difference film, a ridge extending in an obliquely inclined direction corresponding to the displacement direction of the cutting tool is produced, and the regularity of the right-eye region and the left-eye region is made by this ridge. Thus, it is possible to prevent the occurrence of a band-like region having different brightness compared to other parts.

  (7) The angle of the displacement direction of the cutting tool with respect to the longitudinal direction of the first and second regions is an angle of 5 degrees or more and 30 degrees or less.

  According to (7), with a more specific configuration, it is possible to prevent the occurrence of a band-like region having different brightness compared to other parts.

  ADVANTAGE OF THE INVENTION According to this invention, generation | occurrence | production of the strip | belt-shaped area | region from which brightness differs compared with another site | part can be prevented in the passive-type image display apparatus using a pattern phase difference film.

It is a figure which shows the pattern phase difference film which concerns on 1st Embodiment of this invention. It is a figure where it uses for description of 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 where it uses for description of a surface exposure process. It is a figure which shows a roll version in detail. It is a figure where it uses for description of the three-dimensional image display by a passive system. It is a figure where it uses for description of the strip | belt-shaped area | region where brightness differs compared with another site | part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Overall Configuration of First Embodiment]
FIG. 1 is a diagram showing a pattern retardation film applied to the image display device according to the first embodiment of the present invention. In the image display device according to the first embodiment, the pixels of the liquid crystal display panel that are continuous in the vertical direction (the left-right direction is the corresponding direction in FIG. 1) sequentially and alternately display the right-eye image. The pixels are assigned to the left-eye pixels for displaying the left-eye image and the left-eye image, and are driven by the right-eye and left-eye image data, 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. Display at the same time. 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.

  Here, in the pattern retardation film 1, an alignment film 3 and a retardation layer 4 are sequentially formed on one surface of a substrate 2 made of a transparent film such as TAC (triacetyl cellulose). The pattern retardation film 1 is formed of a liquid crystal material that is solidified (cured) in a state where the retardation layer 4 retains refractive index anisotropy, and the alignment of the liquid crystal material is patterned by the alignment regulating force of the alignment film 3. To do. 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 light emitted from the right-eye pixel and the left-eye pixel is given.

  The alignment film 3 is coated on the surface of the base material 2 with a molding resin, which is a resin used to mold a fine concavo-convex shape, and a concavo-convex shape is produced by a molding process of the molding resin. In this embodiment, an ultraviolet curable resin is applied to the shaping resin. As the ultraviolet curable resin, an acrylate-based, methacrylate-based or epoxy-based monomer, a prepolymer, or a mixture thereof with a photopolymerization initiator such as benzophenone or aromatic iodonium added can be applied. .

  Thereby, after the ultraviolet curable resin 5 is applied to the surface of the substrate 2, the pattern retardation film 1 is formed with a minute concavo-convex shape on the surface of the ultraviolet curable resin 5. A film 3 is formed. The pattern retardation film 1 is formed by transferring a minute uneven shape produced on the surface of a molding die to be described later to produce a minute uneven shape related to the alignment film 3, and by the alignment regulating force due to this uneven shape. The retardation layer 4 is patterned. 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 (line) concavo-convex shape extending in one direction, and the direction extending in this one direction is a direction different by 90 degrees between the right-eye region A and the left-eye region B. And is formed so as to be inclined by 45 degrees with respect to the extending direction of each region (the horizontal direction, which is the vertical direction of the paper surface in FIG. 1A). In addition, in the inclination with respect to the extension direction of each area | region, when the retardation of the base material 2 is so large that it cannot disregard, it is increased / decreased suitably according to the retardation value. 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.

  Furthermore, in this embodiment, the alignment film 3 is formed with ridges 6 having a circular arc shape extending in a direction inclined obliquely with respect to the longitudinal direction of the right eye region and the left eye region. In addition, a line-shaped uneven shape corresponding to the above-described right-eye region and left-eye region is formed. Here, the ridge 6 is produced with a width much larger than the line-shaped uneven shape and with a width smaller than the right-eye region A and the left-eye region B. Specifically, the ridge 6 is produced by forming a cutting mark by a chamfering process of a roll plate manufacturing process, which will be described later, and is formed with a width of about 50 μm and a height of 26 nm, for example. As a result, the pattern retardation film 1 is obtained. The projection 6 prevents the occurrence of a band-like region having different brightness compared to other parts.

  The ridges 6 are set to a desired angle within a range in which the inclination θ in the extending direction is not less than 5 degrees and not more than 30 degrees with respect to the longitudinal direction of the right eye region and the left eye region. As a result, the pattern retardation film 1 is obtained. Due to the ridges 6, it is possible to more reliably prevent the occurrence of band-like regions with different brightness compared to other parts.

  That is, as described above with reference to FIG. 8, in the display device using the pattern retardation film, when a white screen is displayed, a band-like region OB having a brightness different from that of other portions is generated as if moiré fringes. . The band-like region OB is considered to be visually generated by regular repeated pattern superposition as in the case of moire because the shape changes when the viewing direction is changed.

  In the image display panel, pixels are arranged in a matrix, and a light-shielding portion using a so-called black matrix is provided between the pixels. On the other hand, in the pattern retardation film, the right-eye area and the left-eye area are alternately provided in the retardation layer, and the boundary between the right-eye area and the left-eye area is a light shielding portion of the image display panel. It is arranged so as to overlap with. However, even if the boundary between the right eye region and the left eye region is arranged so as to overlap the light shielding portion of the image display panel in this way, the emitted light obliquely emitted from each pixel is between the right eye region and the left eye region. It is considered that the band-like region OB is observed due to the regularity of the production cycle of the right-eye region and the left-eye region in the pattern retardation film and the production cycle of the light-shielding portion in the image display panel. It is done.

  Accordingly, as in this embodiment, if the protrusion 6 having a circular arc cross section extending in a direction obliquely inclined with respect to the longitudinal direction of the right eye region and the left eye region is provided, in the pattern retardation film The regularity of the production cycle of the right eye region and the left eye region can be relaxed, and the belt-like region OB can be made invisible.

  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, an ultraviolet curable resin coating solution is applied to the substrate 2 by the die 12. In this manufacturing process 10, the roll plate 20 is a cylindrical mold for molding 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 peripheral side surface of the roll plate 20 by the pressure roller 14, and the ultraviolet curable resin is cured by irradiating the ultraviolet rays with 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 from the roll plate 20 by the peeling roller 16, and the 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 substrate 2 provided by the roll.

  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 smoothed by cutting in the chamfering process. 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 nickel layer is applied to the first inorganic material layer 42, and a nickel layer having a thickness of 100 nm is formed by sputtering. 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 Ny, 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 or the left-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 nickel layer having a thickness of 100 nm is formed by sputtering, and thereby the nickel 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 Ny, SiC, WC, and the like DLC Selected.

  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 (the first inorganic material in this embodiment). The entire surface is rubbed in a direction that forms an angle of 90 degrees with the rubbing direction in the layer 42, and an uneven shape is formed on the surface of the second inorganic material layer (nickel 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.

[Chamfering process]
FIG. 5 is a diagram for explaining the chamfering process (FIG. 3A) of the roll plate manufacturing process. In this embodiment, the concave grooves 52 corresponding to the ridges 6 of the alignment film 3 are formed in the base material 40 by the cutting process in the surface-deposition process. Here, the convex groove 6 of the alignment film 3 is produced so as to extend in a direction inclined obliquely with respect to the longitudinal direction of the right-eye region and the left-eye region, so that the concave groove 52 is formed in the convex groove 6. Corresponding to the circumferential tangential direction, it is manufactured to extend in a direction inclined obliquely by an angle θ.

  For this reason, in this chamfering process, the moving direction of the cutting tool related to the chamfering process on the base material 40 is set to the extending direction of the concave groove 52. Here, such a surface-exposing process is a process of cutting the surface of the base material 40 with a cutting tool to flatten the surface of the base material 40. However, when the surface after the processing is observed finely, FIG. As shown by the above, a cutting mark by the fine groove 52 is produced. The concave groove 52 is a groove having an extremely shallow cross-sectional arc shape. In actual measurement results, the concave groove 52 has a cross-sectional arc shape with a width of about 50 μm and a depth of 26 nm. And a smaller width than the right-eye region A and the left-eye region B.

  More specifically, in this embodiment, as shown in FIG. 5A, the tool trajectory has an angle θ with respect to the circumferential tangential direction by setting the feed speed of the cutting tool with respect to the rotational speed of the base material 40. Accordingly, the obliquely inclined angle θ in the extending direction of the concave groove 52 is set to a desired angle in the range of 5 degrees or more and 30 degrees or less.

  As a result, as shown in FIG. 6A, the roll plate 20 according to this embodiment has a base layer 41, a first inorganic material layer 42, and a second inorganic material on the uneven surface formed by the concave grooves 52. The layer 44 is sequentially provided, and the uneven shape due to the concave groove 52 appears on the surface shape due to the first and second inorganic material layers 42 and 44. Further, when the roll plate 20 is viewed in plan, the concave groove 52 extends at an angle θ with respect to the longitudinal direction of the regions ARA and ARB corresponding to the right eye region A and the left eye region B of the alignment film 3. It will be produced as follows.

  As a result, in the alignment film 3 of the pattern retardation film 61 produced by the roll plate 20, as described above with reference to FIG. 1, the surface shape is changed by the concavo-convex shape by the ridges 6 corresponding to the concave grooves 52. In the above, a line-shaped uneven shape for further orientation is produced. Thereby, in this embodiment, the regularity regarding the boundary of the area | region for right eyes and the area | region for left eyes can be relieve | moderated, and generation | occurrence | production of the strip | belt-shaped area | region where brightness differs compared with another site | part can be prevented.

  In this way, instead of using the chamfering process to create the groove, a dedicated process may be provided separately to make the groove.

  In this embodiment, the surface shape of the alignment film is changed by changing the surface shape of the alignment film by providing protrusions having a cross-sectional arc shape extending obliquely with respect to the longitudinal direction of the right eye region and the left eye region. In comparison, it is possible to prevent the occurrence of band-like regions having different brightness.

  Further, by setting the angle to 5 degrees or more and 30 degrees or less, it is possible to reliably prevent the occurrence of a band-like region having a brightness different from that of other portions.

[Second Embodiment]
In this embodiment, in addition to the configuration of the above-described embodiment, the pitch (width) of the concave grooves 52 (see FIG. 6) is varied randomly or at a constant period, thereby producing a pattern retardation film. The pitch (width) of the projected ridges 6 is varied randomly or at a constant period (see FIG. 1). This embodiment has the same configuration as that of the first embodiment except that the configuration regarding the pitch is different.

  In this embodiment, by changing the pitch (width) of the concave grooves and ridges, the regularity in the pattern retardation film is alleviated and the occurrence of band-like regions having different brightness compared to other parts is prevented. be able to.

[Other Embodiments]
The specific configuration suitable for the implementation of the present invention has been described in detail above, but the present invention can be variously modified and further combined with the configuration of the above-described embodiment without departing from the spirit of the present invention. .

  That is, in the above-described embodiment, the case where the protrusions are formed in the alignment film has been described. However, the present invention is not limited to this, and the boundary between the right eye region and the left eye region may be meandered. By doing so, it is possible to more reliably prevent the occurrence of a band-like region having different brightness as compared with other parts.

  Further, in addition to the configuration of the above-described embodiment, the step between the regions may be reduced. That is, in the above-described embodiment, the first inorganic material layer 42 and the second inorganic material layer 44 are sequentially laminated to produce a roll plate (FIG. 4 (f)), so that in the regions ARA and ARB, A step due to the thickness of the second inorganic material layer 44 occurs. In the pattern retardation film, even this level difference is formed, so that a level difference is generated between the right eye area A and the left eye area B. The occurrence of such a step emphasizes the regularity of the right-eye area A and the left-eye area B that are alternately repeated with respect to the obliquely emitted light from the image display panel. Thus, by reducing such a step, it is possible to surely prevent the occurrence of a band-like region having a brightness different from that of other portions.

  Further, in addition to the configuration of each of the embodiments described above, the boundary in the pattern retardation film may be widened to further prevent the generation of the band-like region. In this case, if the film thickness of the mask 43 is increased, a portion where the rubbing process cannot be sufficiently performed occurs at a portion of the lower layer area ARB that is in contact with the edge of the mask 43, thereby increasing the width of the boundary. .

  Further, in addition to the configuration of each of the embodiments described above, the regularity due to repetition of the right eye region A and the left eye region B is reduced by changing (modulating) the region widths of the right eye region A and the left eye region B. The generation of the band-like region may be further prevented. In this case, for example, the continuous right-eye region A and left-eye region B may be grouped by dividing each region by a certain number, and the region width may be varied in units of each group. Further, the region width may be varied in units of regions, randomly or at a constant pitch. Further, the region width may be varied in the longitudinal direction of each region.

  Further, in addition to the configuration of each of the above-described embodiments, the generation of a band-like region may be further prevented by the processing of the light shielding unit on the image display panel side. In addition, in the processing of the light shielding portion, various methods are widely applied, for example, when the edge of the light shielding portion is meandered, or when the width of the light shielding portion is variable (modulated), similarly to the processing related to the boundary described above. can do.

  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 various types of shaping resins other than the ultraviolet curable resin can be widely applied. In addition, the present invention can be widely applied to the case where the softened base material is directly pressed against the roll plate for shaping.

  In the above-described embodiment, the case where the alignment film is formed by the shaping layer has been described. However, the present invention is not limited to this, and the present invention is widely applied to the case where the alignment film is formed by applying a so-called photo-alignment technique. be able to.

  Moreover, although the case where the pattern phase difference film was produced by the roll plate was described in the above-described embodiment, the present invention is not limited to this, and can be widely applied to the case where the pattern phase difference film is produced by a flat plate.

  In the above-described embodiment, the case where the use of the liquid crystal display panel is assumed has been described. However, the present invention is not limited to this, and the present invention can be widely applied to the case where the use of an organic EL panel or a plasma display panel is assumed. In addition, the present invention can be widely applied to the case where the polarizing filter is provided integrally.

DESCRIPTION OF SYMBOLS 1 Pattern phase difference film 2 Base material 3 Orientation film 4 Phase difference layer 5 Molding layer 6 Convex strip 10 Manufacturing process 11 Supply reel 12, 19 Die 14 Pressure roller 15, 17 Ultraviolet irradiation apparatus 16 Peeling roller 18 Take-up reel 20 Roll plate 40 Base material 41 Underlayer 42, 44 Inorganic material layer 43 Mask 52 Concave groove

Claims (3)

An alignment film and a retardation layer are sequentially provided on a substrate made of a transparent film material,
A phase difference corresponding to the light emitted from the image display panel is given in the retardation layer by the alignment regulating force of the alignment film,
The retardation layer is
A right eye region having a band shape that gives a phase difference corresponding to light emitted from the pixel of the image display panel driven by the right eye image data, and an output from the pixel of the image display panel driven by the left eye image data. The regions for the left eye with a band shape that gives a phase difference corresponding to the incident light are provided alternately in turn,
The alignment film is
Protrusions having a cross-sectional arc shape extending in a direction inclined obliquely with respect to the longitudinal direction of the right eye region and the left eye region are formed, and line-shaped uneven shapes corresponding to the right eye region and the left eye region are formed. Pattern retardation film on which is formed. The pattern retardation film according to claim 1, wherein an angle of an extension direction of the protrusion with respect to a longitudinal direction of the right eye region and the left eye region is an angle of 5 degrees or more and 30 degrees or less. The image display apparatus which has arrange | positioned the pattern phase difference film of Claim 1 or Claim 2.

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