JP5772550B2 - Rubbing apparatus, rubbing method and method for producing pattern retardation film - Google Patents

Description

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

  Conventionally, flat panel displays have been mainly two-dimensional displays. However, in recent years, flat panel displays capable of three-dimensional display have attracted attention, and some are also commercially available. Further, there is a tendency that future flat panel displays are capable of three-dimensional display, and flat panel displays capable of three-dimensional display are being studied in a wide range of fields.

  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 in some manner, respectively, to the viewer's right eye and left eye. As a method for selectively providing a right-eye video and a left-eye video, for example, a passive method is known. This passive three-dimensional display method will be described with reference to the drawings. FIG. 8 is a schematic diagram showing an example of a passive three-dimensional display using a liquid crystal display panel. In the example of FIG. 8, pixels that are continuous 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 the image data for the left eye, and thereby the image for the right eye and the image for the left eye are simultaneously displayed. In this way, 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 strip-shaped region having a short side in a vertical direction and a long side in a horizontal direction. 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. For this reason, 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. Accordingly, in the passive method, glasses (glasses) each having a corresponding polarizing filter are attached, 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. 9, the long side direction of the screen is shown as the horizontal direction in accordance with the name in the normal image display apparatus. In the passive method, the pixels that are continuous in the horizontal direction in FIG. 9 are distributed and driven for the right eye and the left eye in the belt-like area having the long side in the vertical direction (the short side direction of the screen), and this is supported. Even when a pattern retardation film is prepared, a three-dimensional image can be displayed in the same manner.

  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. Therefore, the passive liquid crystal display device has been attracting a great deal of attention as a center of the future three-dimensional display device.

  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. This pattern retardation film has not been widely researched and developed yet, and there is no established standard technology.

  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. Further, Patent Document 2 discloses a method for forming a photo-alignment film in which a fine uneven shape is formed around a roll plate by laser irradiation, and this uneven shape is transferred to control the alignment regulating force in a pattern shape. ing.

  Although it is desired that such a pattern retardation film can be mass-produced efficiently with high accuracy, the conventional method has a problem that is still insufficient in practice from such a viewpoint. More specifically, from the viewpoint of efficient mass production, although a method using a roll plate is excellent, when using a roll plate, the roll plate is prepared with high accuracy and a simple process. There is a problem that must be.

JP 2005-49865 A JP 2010-152296 A

  This invention is made | formed in view of such a condition, and it aims at enabling it to mass-produce efficiently with high precision regarding the pattern phase difference film etc. which concern on a passive system.

  The present inventor has intensively studied in order to solve the above-mentioned problems, and creates a concavo-convex shape related to the alignment film with a roll plate, and rotates a rubbing roll inclined obliquely while rotating the base material of the roll plate. The idea of rubbing the entire circumference of the roll plate by moving it by pressing it against the base material while rotating it has led to the completion of the present invention.

    Specifically, the present invention provides the following.

(1) In a rubbing apparatus for rubbing a base material of a roll plate to be used for transferring uneven shapes,
A roll plate drive for rotating the base material;
With the rotation axis of the rubbing roll tilted obliquely with respect to the rotation axis of the base material, the rubbing roll is pressed against the side surface of the base material as a cylinder while rotating the rubbing roll, and the rubbing roll is rotated by the roll plate And a rubbing roll drive unit that moves in a direction along the axis.

  According to (1), by setting the inclination of the rubbing roll, a roll plate can be produced by producing a line-shaped uneven shape extending in a desired direction. Therefore, this roll plate can efficiently mass-produce, for example, a pattern retardation film with high accuracy.

  (2) In (1), the inclination of the rubbing roll is variable.

  According to (2), when producing uneven shapes with different extending directions, it is possible to produce uneven shapes with different extending directions using a single device, and the equipment can be used efficiently. This also makes it possible to mass-produce film materials such as pattern retardation films with high accuracy and efficiency.

(3) In a rubbing method for rubbing a base material of a roll plate to be used for transferring uneven shapes,
By pressing the rubbing roll against the cylindrical side surface of the base material while rotating the rubbing roll in a state where the central axis of the rubbing roll is obliquely inclined with respect to the central axis of the base material In order to produce a concavo-convex shape on the side surface of the base material,
The base material is rotated about the central axis of the base material, and the rubbing roll is moved in a direction along the central axis of the base material, thereby moving the concavo-convex shape production site. Rub the side of the base material.

  According to (3), by setting the inclination of the rubbing roll, it is possible to produce a roll plate by producing a line-shaped uneven shape extending in a desired direction. Therefore, this roll plate can efficiently mass-produce, for example, a pattern retardation film with high accuracy.

(4) Production of a patterned retardation film by patterning a retardation layer by an alignment regulating force by an alignment film provided on a substrate made of a transparent film material, and providing a retardation corresponding to the transmitted light of the retardation layer In the method
In the alignment film,
By transferring the surface shape of the roll plate, a first region in which minute line-like uneven shapes are formed in a substantially constant direction and a minute line-like uneven shape in a direction different from the first region are formed. Second regions are alternately provided in a strip shape,
The manufacturing method includes:
A first concavo-convex shape for producing a concavo-convex shape corresponding to the first region in the base material by pressing and moving the side surface as the cylinder of the base material rotating while rotating the inclined rubbing roll Shape production process;
By setting the inclination of the rubbing roll to an inclination different from that of the first concavo-convex shape manufacturing step, while rotating the rubbing roll, by pressing and moving the side surface of the base material of the rotating roll plate, A second concavo-convex shape producing step of producing a concavo-convex shape corresponding to the second region in the base material.

  According to (4), by setting the inclination of the rubbing roll, a roll plate can be produced by producing a line-shaped uneven shape extending in a desired direction. Therefore, this roll plate can efficiently mass-produce the pattern retardation film with high accuracy.

  According to the present invention, a film material such as a pattern retardation film can be mass-produced efficiently with high accuracy.

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 where it uses for description of the manufacturing method of the metal mold | die of FIG. It is a figure which shows the continuation of FIG. It is a figure which shows a rubbing apparatus. It is a figure which shows the setting of the rubbing apparatus in the 2nd rubbing process. It is a figure where it uses for description of order. It is a figure where it uses for description of the three-dimensional image display by a passive system.

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

[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 (left-right direction in FIG. 1) are alternately displayed in order of the right-eye pixel and the left-eye pixel. They are distributed to the left-eye pixels that display the video, and are driven by right-eye and left-eye image data, respectively. As a result, the image display apparatus alternately divides the display screen into a band-like region for displaying the right-eye image and a band-like region for displaying the left-eye image, and separates the right-eye image and the left-eye image. 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. 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.

  In the pattern retardation film 1, after the ultraviolet curable resin 5 is applied to the surface of the substrate 2, minute uneven shapes are formed on the surface of the ultraviolet curable resin 5. In the pattern retardation film 1, the alignment film 3 is formed by the uneven shape on the surface of the ultraviolet curable resin 5. The pattern retardation film 1 is formed by transferring a minute uneven shape produced on the surface of a mold, which will be described later, to produce a minute uneven shape related to the alignment film 3, and the retardation layer is formed by the alignment regulating force due to the uneven shape. 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 the one direction is one of the right eye region A and the left eye region B. The first region corresponding to the right region and the second region corresponding to the other direction of the right eye region A and the left eye region B are in directions different from each other by 90 degrees, and the extending direction of each region (horizontal direction) 1 and corresponding to the direction connecting the upper right and the lower left in FIG. 1). 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.

[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, 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 in which the uneven shape related to the alignment film 3 of the pattern retardation film 1 is formed around. In the manufacturing process 10, the substrate 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 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 side surface (henceforth only a "side surface") as a cylinder 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 a sheet material wound around the take-up reel 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. 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.

[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, after the surface of the base material 40 is polished and smoothed (FIG. 3A), in the first concavo-convex shape manufacturing process, the first surface is formed by a fine line-shaped concavo-convex shape on the entire surface of the base material 40. An uneven region 42 is formed (FIG. 3B). 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 not particularly limited as long as a later-described resist layer 43 or the like can be laminated so as to be peeled and removed, and various metal materials such as nickel, chromium, titanium, copper, and cobalt, SiO ₂ , DLC ( Although various inorganic oxides such as diamond-like carbon) and TiO ₂ can be widely applied, they are metal materials, DLC, TiO _{2 and the} like from the viewpoint of laminating a resist layer 43 and the like described later so that they can be removed. Of these, nickel, chromium, and DLC are more preferable. In addition, a material in which various metal material layers are formed on the surface by applying a technique such as sputtering may be applied. For example, tungsten, titanium, titanium oxide which is a metal compound, titanium nitride, tungsten is applied to the metal material layer on the surface. If carbide, chromium oxide, chromium molybdenum, or nickel chromium molybdenum is applied, the strength can be improved.

  The first uneven region 42 is formed on the surface of the base material 40 by forming 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 addition, the surface said here means the side surface as a cylinder of the base material 40 which has a cylindrical shape. Specifically, in this embodiment, this concavo-convex shape is produced by a rubbing process using a rubbing roll R.

  Subsequently, in the mask plate manufacturing process, the roll plate 20 is formed with a mask that covers the region ARA corresponding to the right eye region A and exposes the region ARB corresponding to the left eye region B with a resist material. 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, a second layer film 44 of an inorganic material is formed on the entire surface with a film thickness of 0.1 μm. As a result, a second layer pattern composed of the second layer film 44 is formed on the surface of the base material 40 not masked by the resist layer 43. The second layer film 44 is formed by applying a metal material such as chromium, titanium, nickel, etc., a metal compound, and DLC by applying, for example, a sputtering method.

  Subsequently, as shown in FIG. 4E, in the second concavo-convex shape manufacturing step, a direction different from the first concavo-convex region 42 (in this embodiment, the rubbing direction of the first concavo-convex region 42 forms an angle of 90 degrees. The surface of the second layer film 44 is rubbed with a rubbing roll R to produce a concavo-convex shape on the surface of the second layer film 44. Thereafter, as shown in FIG. 4 (f), in the manufacturing process, in the subsequent resist removing process, the resist layer 43 is removed together with the second layer film 44 as an upper layer thereof, whereby the alignment is performed by performing the uneven shape forming process twice. Concave and convex shapes corresponding to the regions A and B of the film 3 are produced. Note that the roll plate manufacturing process is performed in a clean room in which the air cleanliness is controlled, thereby effectively avoiding manufacturing defects due to adhesion of foreign matter.

[Rubbing device]
5 and 6 are diagrams showing the rubbing apparatus. FIG. 5 is a diagram showing the setting at the time of the first rubbing process described above with reference to FIG. 3B, and FIG. 6 is the setting at the time of the second rubbing process described above with reference to FIG. FIG. The rubbing device 50 is installed in a clean room in which the air cleanliness is controlled, thereby effectively avoiding manufacturing defects due to the adhesion of foreign matter.

  The rubbing device 50 holds a cylindrical base material 40 related to the roll plate 20 so that the central axis a thereof is substantially horizontal, and as shown by an arrow A, a roll plate drive unit equipped with an electric motor in this state. 51, the base material 40 is rotated around the central axis a at a predetermined rotational speed. In this state, the rubbing apparatus 50 holds the rubbing roll 52, holds the rubbing roll 52 by tilting the rotating shaft b of the rubbing roll obliquely with respect to the rotating shaft a of the base material 40, as indicated by an arrow B. The rubbing roll 52 is pressed against the side surface of the base material 40 while being driven to rotate in the direction of arrow B by a rubbing roll driving unit 53 equipped with an electric motor. The crossing angle (inclination angle) between the rotation axis a and the rotation axis b depends on the design of the alignment film 3 and the retardation layer 4, but is in the range of 10 to 90 degrees, usually 30 to 60 degrees. It is. In the present embodiment, the crossing angle is 45 degrees as shown in FIGS.

Here, the rubbing roll 52 is a columnar member around which a rubbing cloth to be subjected to a rubbing process is wound. As a result, the rubbing device 50 performs rubbing by rubbing the surface of the base material 40 with the rubbing cloth on the surface while rotating the rubbing roll 52. Here, as the rubbing cloth, for example, various cloth materials that can be used for rubbing treatment, natural leather, artificial leather, and the like can be widely applied. In this embodiment, the rubbing treatment is performed with a flocking cloth which is a cloth material having a large number of fibers flocked on the surface. The material for the rubbing cloth is appropriately selected from cellulose, rayon, polyamide (nylon: registered trademark), polyolefins such as polyethylene, acrylic resin, polyester resin, urethane resin and the like. A general pile having a pile length of 1 to several mm, a density of 20 to 40,000 filaments / cm2, a pile diameter of several tens to 300 dinars, and a pile number of about 250 to 1500 / cm2 is used. The preferred material is a flocked fabric using chemical fibers such as rayon and nylon with less rubbing residue. In this case, the pile length is 1 to 2 mm, the density is 2.5 to 35,000 filaments / cm ² , the pile diameter. Several 50 to 150 dinar, the number of piles 600 to 1000 / cm ² , and the spreading angle of the filament is 5 to 20 °.

  In addition, the rubbing apparatus 50 locally rubs the side surface of the base material 40 in this way, and the rubbing roll driving unit 53 causes the base material 40 to move in the direction along the rotation axis a (center axis). The rubbing roll 52 is gradually moved. As a result, in the rubbing apparatus 50, even if the axial length of the base material 40 is much longer than the length of the rubbing roll 52 by gradually changing the region to be rubbed, Rubbing all sides. The movement in the direction along the central axis of the rubbing roll 52 is repeated as necessary. When the rubbing roll 52 is repeatedly moved, the rubbing process may be performed on both the forward path and the return path, or the rubbing process may be performed only on one of the forward path and the return path. The rotating peripheral speed of the rubbing roll 52 is several tens to several hundreds m / min, the rotating peripheral speed of the base material is several m to several tens m / min, and a ratio of 5 to 50 is appropriate.

  However, when the pattern retardation film is produced by continuous processing using a roll plate as in this embodiment, the pattern retardation film can be mass-produced easily and with high accuracy.

  By the way, if the axial length of the roll plate 20 is increased, a pattern retardation film for a large screen can be produced by processing the roll material with a wide width, and further, a pattern retardation film is produced by taking a large number of pieces in the width direction. Can be very convenient in manufacturing. However, in the roll plate, there is a drawback that it is difficult to perform the rubbing treatment with high accuracy by rubbing the side surface by the cylindrical shape, as compared to the case of producing the mold for producing the alignment film with a flat plate, Furthermore, when the axial length is increased, the production becomes more difficult. However, as in this embodiment, when the base material 40 of the roll plate 20 is rotated, the slanted rubbing roll 52 is pressed against the base material 40 and moved while being rotated. The entire circumference of the plate can be rubbed, and the roll plate 20 can be easily produced with high accuracy. In addition, it is possible to effectively prevent the occurrence of optical axis shift and schlieren defect and produce a concavo-convex shape on the entire surface, and this also makes it possible to produce a highly accurate pattern retardation film.

  In this embodiment, the rubbing device 50 is configured so that the inclination of the rubbing roll 52 can be varied. In the first rubbing process (FIG. 5), the displacement direction (circular circle) of the surface of the base material 40 with which the rubbing roll 52 contacts. The rotation axis b of the rubbing roll 52 is set to be inclined 45 degrees with respect to the circumferential tangent method. On the other hand, in the second rubbing process (FIG. 6), the rotation axis is inclined by 90 degrees from the first time, and is inclined by 45 degrees on the opposite side to the first with respect to the direction of the circumferential tangent. Is set as follows. Thereby, in this embodiment, one rubbing apparatus can be shared by the rubbing process related to the area for the right eye and the rubbing process related to the area for the left eye, and the manufacturing process can be simplified. Deviations that occur when transferring irregularities from the roll plate (considered by the geometrical transformation from the circumferential surface of the roll plate to the substrate surface of the pattern retardation film, the electrostatic field during transfer, etc. If the error is not negligible as an error, the deviation is corrected by correcting the rubbing direction by changing the inclination of the rubbing roll 52 by an amount that offsets the deviation.

  Further, in this rubbing apparatus 50, as indicated by arrows A and B in FIGS. 5 and 6, the displacement direction of the side surface of the base material 40 and the side surface of the rubbing roller 53 at the location where the rubbing roll 52 contacts. The rotation directions of the base material 40 and the rubbing roll 52 are set so that the displacement direction is the reverse direction. Thereby, in the rubbing apparatus 50, foreign matter such as dust that adheres to the side surface of the base material 40 and arrives at the rubbing location is blown off by the rotation of the rubbing roll 52, and the occurrence of defects due to the foreign matter is prevented.

  Furthermore, in this rubbing apparatus 50, the direction of rotation of the rubbing roll 52 is set in this way, and the rubbing process by the rubbing roll 52 is executed in order. FIG. 7 is a drawing for explaining this order, and is a view showing the flocked surface of the rubbing cloth 54 as viewed from above. As described above, the rubbing roll 52 has a rubbing cloth 54 made of a flocking cloth attached to the side surface, and fibers 55 of nylon, rayon, etc. are flocked to the rubbing cloth 54. The order is the friction direction in which the frictional resistance of the rubbing cloth is the smallest, and in the example shown in FIG. 7, the direction from the root of each fiber toward the tip is the order direction when viewed from above. Thereby, in this embodiment, the rubbing cloth 54 is disposed on the side surface of the rubbing roll 52 so that the displacement direction of the surface of the base material 40 with which the rubbing cloth 54 comes into contact is the forward direction. Thereby, in this embodiment, the fibers of the rubbing cloth are directed in a certain direction during the rubbing process, thereby reducing the irregularities of the uneven shape due to the line shape. In the case of a rubbing cloth, the orientation of each fiber may be greatly disturbed. Therefore, in such a case, the order direction of the rubbing cloth may be determined by statistically processing the order direction of each fiber by averaging or the like.

  According to the above configuration, the entire circumference of the roll plate is rubbed simply and with high accuracy by rotating the rubbing roll tilted obliquely against the base material while rotating the base material of the roll plate while rotating it. Thus, a highly accurate pattern retardation film can be mass-produced.

  Further, since the direction of the rubbing roll can be changed, the apparatus can be used in common by two rubbing processes.

[Other Embodiments]
As mentioned above, although the specific structure suitable for implementation of this invention was explained in full detail, this invention can change the structure of the above-mentioned embodiment variously in the range which does not deviate from the meaning of this invention.

  That is, in the above-described embodiment, when a base plate having a concavo-convex shape in one direction formed on the entire surface is masked with a resist film to form a concavo-convex shape in the other direction, a roll plate is manufactured by a manufacturing process for removing the resist film. However, the present invention is not limited to this, and can be widely applied to the case where a pattern retardation film is produced by a production die produced by various production processes. Specifically, the present invention can be widely applied to a case where a manufacturing die is manufactured by alternately manufacturing masked regions corresponding to a right eye region and a left eye region, respectively.

  Moreover, the above-mentioned embodiment described the case where the alignment film 3 was prepared by transferring the specific uneven shape to the surface of the layer of the ultraviolet curable resin 5 by the setting of FIG. However, the present invention is not limited to this mode, and the surface may be formed by transferring the specific uneven shape onto the surface of the electron beam curable resin layer by means of an arrangement as shown in FIG. In this case, a known electron beam irradiation apparatus is used instead of the ultraviolet irradiation apparatus 15. The electron beam curable resin may be the same as the ultraviolet curable resin except that it does not contain a photopolymerization initiator. Others are basically the same as in the case of using an ultraviolet curable resin, the process, and the materials used.

  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.

  Further, in the above-described embodiment, the case where the present invention is applied for the production of the alignment film according to the pattern retardation film has been described. However, the present invention is not limited to this, and the fine optical film according to the alignment film is not limited to this. The present invention can be widely applied when the uneven shape is produced on a transparent film material.

DESCRIPTION OF SYMBOLS 1 Pattern phase difference film 2 Base material 3 Orientation film 4 Phase difference layer 5 UV curable resin 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 42 First uneven region 43 Resist layer 44 Second layer film 50 Rubbing device 51 Roll plate driving unit 52 Rubbing roll 53 Rubbing roll driving unit 54 Rubbing cloth 55 Fiber

Claims (4)

In the rubbing apparatus for rubbing the base material of the roll plate to be used for the uneven shape transfer,
A roll plate drive for rotating the base material;
With the rotation axis of the rubbing roll tilted obliquely with respect to the rotation axis of the base material, the rubbing roll is pressed against the side surface of the base material as a cylinder while rotating the rubbing roll, and the rubbing roll is rotated by the roll plate A rubbing apparatus comprising: a rubbing roll drive unit that moves in a direction along an axis. The rubbing apparatus according to claim 1, wherein an inclination of the rubbing roll is variable. In the rubbing method for rubbing the base material of the roll plate to be used for transferring the uneven shape,
By pressing the rubbing roll against the cylindrical side surface of the base material while rotating the rubbing roll in a state where the central axis of the rubbing roll is obliquely inclined with respect to the central axis of the base material In order to produce a concavo-convex shape on the side surface of the base material,
The base material is rotated about the central axis of the base material, and the rubbing roll is moved in a direction along the central axis of the base material, thereby moving the concavo-convex shape production site. A rubbing method in which the side surface of the base material is rubbed. In the method for producing a patterned retardation film, the retardation layer is patterned by an orientation regulating force by an orientation film provided on a substrate made of a transparent film material, and a retardation corresponding to the transmitted light of the retardation layer is given.
In the alignment film,
By transferring the surface shape of the roll plate, a first region in which minute line-like uneven shapes are formed in a substantially constant direction and a minute line-like uneven shape in a direction different from the first region are formed. Second regions are alternately provided in a strip shape,
The manufacturing method includes:
While rotating the slanted rubbing roll, the concave and convex shape corresponding to the first region is produced in the base material by pressing and moving the side surface as the cylinder of the base material of the rotating roll plate. 1 uneven shape manufacturing process,
By setting the inclination of the rubbing roll to an inclination different from that of the first concavo-convex shape manufacturing step and moving the rubbing roll while pressing the side surface of the rotating base material while rotating the rubbing roll, the second A method for producing a patterned retardation film, comprising: a second concavo-convex shape producing step for producing a concavo-convex shape corresponding to a region in the base material.

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