JP5516565B2 - Optical film manufacturing apparatus and optical film manufacturing method - 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. 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 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. Incidentally, the slow axis direction of the adjacent strip-like region is usually any combination of +45 degrees and −45 degrees, 0 degrees and +90 degrees, and 0 degrees and −90 degrees with respect to the horizontal direction. 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. In the passive method, the pixels that are continuous in the horizontal direction in FIG. 7 are driven by being distributed to the band-like region having the long side in the vertical direction (the short side direction of the screen) for the right eye and the left eye, and corresponding to this. Even when a pattern retardation film is produced, 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 efficiently mass-produced with high quality, 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, a method of using a roll plate is excellent, but when using a roll plate, there is still an insufficient problem in terms of quality.

JP 2005-49865 A JP 2010-152296 A

  This invention is made | formed in view of such a condition, It aims at enabling it to mass-produce efficiently with high quality regarding optical films, such as a pattern phase difference film which concerns on a passive system.

  The present inventor has made extensive studies to solve the above problems, and found that radial coating unevenness generated in the liquid crystal layer constituting the retardation layer is caused by electrostatic discharge, and reduces the charge amount due to the static electricity. The idea of providing a static elimination mechanism was reached, and the present invention was completed.

    Specifically, the present invention provides the following.

(1) In an optical film manufacturing apparatus in which an alignment film and a liquid crystal layer are sequentially formed on a transparent film substrate
Pulling out the substrate on which the alignment film has been produced from an intermediate reel, and transporting it to the step of producing the liquid crystal layer,
A static elimination mechanism is provided for reducing the amount of charge of the base material drawn out from the intermediate reel.

  According to (1), by reducing the charge amount of the base material by the static elimination mechanism, it is possible to prevent the discharge of the charge charged on the base material and to effectively avoid the occurrence of coating unevenness due to this discharge. Thereby, the quality of an optical film can be improved by processing with a roll and mass-producing an optical film such as a pattern retardation film efficiently.

(2) In (1), the static elimination mechanism includes:
A conductive member is provided that is grounded and disposed along a portion where the base material is peeled off from the intermediate reel.

  According to (2), the static elimination mechanism is applied to production in a clean room by being provided with a conductive member that is grounded and disposed along a location where the base material is peeled off from the intermediate reel. Thus, the quality of the optical film can be improved.

(3) In (2), the static elimination mechanism includes:
A winding diameter detector for detecting the winding diameter of the intermediate reel;
And a movable portion that varies the position of the conductive member by following the change in the winding diameter based on the detection result of the winding diameter detection portion.

  According to (3), by changing the position of the conductive member following the change in the winding diameter, even when the winding diameter is changed by feeding the base material, the function of the static elimination mechanism does not deteriorate. Thus, the quality of the optical film can be stably maintained.

(4) In (1), (2) or (3),
The optical film is a pattern retardation film used for image display by a passive method.

  According to (4), it can apply to the manufacturing apparatus of a pattern phase difference film, and can mass-produce a pattern phase difference film efficiently by high quality.

(5) In the method for producing an optical film in which an alignment film and a liquid crystal layer are sequentially produced on a substrate made of a transparent film,
Pulling out the substrate on which the alignment film has been produced from an intermediate reel, and transporting it to the step of producing the liquid crystal layer,
A charge eliminating step for reducing the charge amount of the base material drawn from the intermediate reel.

  According to (5), by reducing the amount of charge of the base material in the charge removal step, it is possible to prevent the discharge of the charge charged on the base material and to effectively avoid the occurrence of coating unevenness due to this discharge. Thus, the quality of the pattern retardation film can be improved by processing with a roll and efficiently mass-producing an optical film such as a pattern retardation film.

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

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. FIG. 3 is a diagram showing a continuation of FIG. 2. 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 static elimination mechanism. 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, pixels that are continuous in the vertical direction (the left-right direction in FIG. 1) of the liquid crystal display panel are alternately and sequentially displayed for right-eye pixels and left-eye pixels that display a right-eye image. 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 that is a liquid crystal layer retains refractive index anisotropy, and the alignment of the liquid crystal material is regulated by the alignment film 3. Pattern by force. 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, a minute uneven shape is 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 the first half of the manufacturing process of the pattern retardation film 1. This manufacturing process 10 is an alignment film manufacturing process for manufacturing the alignment film 3 on the substrate 2. 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, the ultraviolet curable resin is sequentially applied to the substrate 2 in the application process 12 of the ultraviolet curable resin. More specifically, in the coating step 12, a coating solution of an ultraviolet curable resin is applied by the die 13. The manufacturing process 10 dries the ultraviolet curable resin applied to the substrate 2 in the subsequent drying process 17. For this reason, the drying process 17 leads to the dryer 18, where the ultraviolet curable resin is dried for 10 minutes with hot air at 100 ° C., and is sent to the next process in an uncured state.

  Subsequently, in the molding process 19, in the molding process 19, the fine line-shaped irregularities formed on the surface of the transfer mold are transferred to the surface of the ultraviolet curable resin to produce the alignment film 3. That is, in this forming step 19, the roll plate 20 having a cylindrical shape is a transfer mold, and the surface of the roll plate 20 has a fine uneven shape to be used for transfer. The molding step 19 presses the ultraviolet curable resin layer provided on the base material 2 against the roll plate 20 by the pressing roller 19A, and in this state, the ultraviolet light from the ultraviolet irradiation device 23 is irradiated from the base material 2 side. The UV curable resin is cured. Further, after peeling the base material 2 from the roll plate 20 by the peeling roller 19B, the uncured ultraviolet curable resin is cured by irradiating the ultraviolet rays again by an ultraviolet irradiation device (not shown) and wound on the intermediate reel 24 to continue the process. Send it out.

  FIG. 3 is a schematic diagram showing the latter half of the manufacturing process of the pattern retardation film 1. This manufacturing process 30 is a manufacturing process of the retardation layer 4. In the manufacturing process 30, the supply of the base material 2 on which the alignment film 3 is manufactured in the manufacturing process 10 of FIG. 2 is received by the intermediate reel 24. In the manufacturing process 30, the liquid crystal material is sequentially applied to the substrate 2 by the die 33 in the liquid crystal material application process 31. The applied liquid crystal material is applied on the alignment film 3 in the travel direction (extension direction) of the line-shaped unevenness in the band-like regions A and B shown in FIG. Orient.

  Subsequently, in the manufacturing process 30, in the subsequent drying process 34, the liquid crystal material applied to the substrate 2 by the dryer 35 is dried with hot air. In the manufacturing process 30, in the subsequent ultraviolet irradiation process 36, the substrate 2 is wound around the roller 37 via the pressing roller 36 </ b> A, and the ultraviolet light from the ultraviolet irradiation device 38 is irradiated here. Here, the roller 37 is an iron cooling roller through which cooling water circulates, and thus the manufacturing process 30 suppresses the temperature rise of the substrate 2. Thus, in this manufacturing process 30, the liquid crystal material remains in a state in which the liquid crystal molecules are aligned in a predetermined pattern (with an alignment pattern that matches the extending direction of the line-shaped uneven shape on the alignment film 3 in FIG. 1). The retardation layer 4 is produced by curing with the above, and the base material 2 is sent out through the peeling roller 36B. In the manufacturing process 30, an adhesive layer, an antireflection layer, and the like are subsequently formed as necessary, and then cut into a desired size to produce the pattern retardation film 1. Thereby, in the pattern phase difference film 1, the base material 2 provided by the roll is continuously processed by transferring the concavo-convex shape using the roll plate 20, and is efficiently produced in a large amount by a simple manufacturing process.

[Roll plate manufacturing process]
4 and 5 are diagrams showing a manufacturing process of the roll plate 20 which is a mold for manufacturing a pattern retardation film. 4 and 5, regions corresponding to the regions A and B of the pattern retardation film 1 are denoted by reference numerals ARA and ARB, respectively. In this manufacturing process, after the surface of the base material 40 is polished and smoothed (FIG. 4A), 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. The uneven region 42 is formed (FIG. 4B). 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, the 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, then exposed to ultraviolet rays, and developed to produce a mask exposing 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. Various methods can be widely applied even in the coating method and the exposure method.

  Subsequently, as shown in FIG. 5D, 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. 5E, 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 entire surface is rubbed with a rubbing roll R in a direction) to form a concavo-convex shape on the surface of the second layer film 44. Thereafter, as shown in FIG. 5 (f), in the manufacturing process, the resist layer 43 is removed together with the second layer film 44 on the upper layer in the subsequent resist removing process, whereby the alignment is performed by two uneven shape forming processes. Concave and convex shapes corresponding to regions A and B of the film 3 are produced.

[Charging mechanism]
By the way, when the pattern retardation film was produced by the manufacturing steps 10 and 30 described above, radial coating unevenness was found in the retardation layer 4 which is a liquid crystal layer. When such coating unevenness occurs, it becomes difficult for the phase difference layer 4 to impart a correct phase difference to the transmitted light at the location, so that the right-eye video light to be selectively incident on the right eye is transmitted to the left eye. On the contrary, the crosstalk in which the left eye image light that should be selectively incident on the left eye leaks locally occurs and the image quality deteriorates remarkably. Thereby, the quality of a pattern phase difference film will fall. In addition, the coating unevenness itself may be visually recognized, and in this case, the quality of the pattern retardation film is remarkably deteriorated.

  As a result of various investigations on the coating unevenness, the surface of the alignment film 3 is charged by the peeling charging when the substrate 2 is pulled out from the intermediate reel 24 in the manufacturing process 30, and the accumulated charge due to this charging is discharged in the coating process 31 of the liquid crystal material. It was found that uneven coating occurs. In particular, in the patterned retardation film 1, the retardation layer, which is a liquid crystal layer, is patterned by the alignment regulating force of the alignment film. As a result, it is necessary to strictly prevent discharge in the alignment film.

  Therefore, in this embodiment, a static elimination mechanism is provided at a position where the base material 2 is pulled out from the intermediate reel 24, and this removal mechanism reduces the charge amount (charge charge amount) of the alignment film 3 to prevent discharge, thereby generating coating unevenness. To prevent. In addition, even if an antistatic agent is added to the coating solution of the ultraviolet curable resin related to the alignment film 3 and the coating solution of the retardation layer 4, the charge amount of charging can be reduced, and discharge can be prevented. As a result, the occurrence of uneven coating can be prevented. However, in this case, there is a side effect that the alignment of the liquid crystal material in the retardation layer 4 is disturbed. On the other hand, when the charge removal amount is reduced by the charge eliminating mechanism to prevent the occurrence of uneven coating, the occurrence of such side effects can be prevented.

  FIG. 6 is a diagram showing this static elimination mechanism. Here, as described above, in the manufacturing process 30, the base material 2 on which the alignment film 3 is manufactured in the manufacturing process 10 is wound and supplied to the intermediate reel 24 so that the alignment film 3 is on the inner side. In the manufacturing process 30, the intermediate reel 24 functions as a paper feed roll, and the base material 2 is unwound from the intermediate reel 24 via rollers 24 </ b> A and 24 </ b> B and sequentially sent to the liquid crystal material application process 31. The pattern phase difference film 1 is peeled and charged when the substrate 2 is unwound from the intermediate reel 24, and the static elimination mechanism 50 is disposed so as to reduce the amount of charge due to the peeling band charge.

  That is, in the static elimination mechanism 50, the rotation shaft 51 whose axial length is longer than the width of the base material 2 wound around the intermediate reel 24 is held outside the circumference of the intermediate reel 24 so as to be substantially parallel to the rotation center axis of the intermediate reel 24. A pair of arms 52 are provided at both ends of the rotating shaft 51. Further, the static elimination mechanism 50 is provided with a static elimination string 53 so as to connect the tips of the pair of arms 52. Here, the static elimination string 53 is a string-like member having conductivity by a metal material such as stainless steel or copper. In the static elimination mechanism 50, the static elimination cord 53 is disposed on the alignment film 3 side immediately after the location where the base material 2 is peeled off from the intermediate reel 24, and is separated from the base material 2, and the static elimination cord 53 is grounded. . Thereby, the static elimination mechanism 50 reduces the charge amount of the alignment film 3 by the grounded static elimination string 53, and effectively avoids the occurrence of uneven coating.

  In the static elimination mechanism 50, the winding diameter detection unit 54 detects the winding diameter of the intermediate reel 24. As a method for detecting the winding diameter, when the winding diameter of the intermediate reel 24 is directly detected by an optical method or the like, the winding diameter is detected by the rotational speed of the intermediate reel 24 that changes as the base material 2 is fed out at a constant speed. In various cases, various detection methods can be widely applied.

  Based on the detection result of the winding diameter detection unit 54, the static elimination string movable unit 55 drives a motor (not shown) to rotate the rotation shaft 51 to follow the change in the winding diameter of the intermediate reel 24 and remove the neutralization string. The position 53 is varied in the radial direction of the intermediate reel 24. Thereby, the static elimination string movable part 55 holds the static elimination string 53 at a fixed position with respect to the winding surface of the intermediate reel 24, and prevents a decrease in function due to a change in the winding diameter of the intermediate reel 24. In the static elimination mechanism 50, the arm 52 is formed in a dogleg shape so that the tip is bent toward the intermediate reel 24 side, and this is also configured to prevent deterioration of the function due to a change in the winding diameter of the intermediate reel 24. The

  According to the above configuration, by removing the charge amount of the base material by providing a static elimination mechanism at the location where the base material is drawn from the intermediate reel, the discharge of the charge charged on the base material is prevented, and the coating unevenness due to this discharge is prevented. Occurrence can be effectively avoided. Thereby, it can process with a roll and mass-produce a pattern phase difference film efficiently, and can improve the quality of a pattern phase difference film.

  In addition, since this static elimination mechanism is a conductive member that is grounded and disposed along the location where the substrate is peeled off from the intermediate reel, the pattern phase difference can be applied to production in a clean room. The quality of the film can be improved.

  In addition, by changing the position of the static elimination string by following the change in the winding diameter by the winding diameter detection unit and the static elimination string moving part, the function of the static elimination mechanism does not deteriorate even when the base diameter is changed and the winding diameter changes. Thus, the quality of the pattern retardation film can be stably maintained.

[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, the case of disposing the static elimination string that is a conductive string-like member has been described. However, the present invention is not limited to this, and for example, when a conductive plate made of a metal plate material is disposed, static elimination is possible. Various kinds of conductive materials may be arranged.

  Further, in the above-described embodiment, the case where the discharge cord is disposed at a position immediately after being peeled off from the intermediate reel has been described, but the present invention is not limited to this, and if practically sufficient, the other places are used. Further, static elimination may be performed by disposing a static elimination string or the like at a plurality of locations.

  In the above-described embodiment, the case where the concavo-convex shape is formed on the roll plate by the rubbing process has been described. However, the present invention is not limited to this and can be widely applied to the case where the surface is manufactured by polishing or the like.

  Further, in the above-described embodiment, after masking only the region where the concavo-convex shape in one direction is left on the entire surface of the base material in which the concavo-convex shape in one direction is formed with the resist film, the concavo-convex shape in the other direction is prepared, Although the case where a roll plate is produced by removing the resist film has been described, the present invention is not limited to this, and is widely applied to the case where a pattern retardation film is produced by a production die produced by various production processes. Can do. 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.

  In the above-described embodiment, the case where the present invention is applied to the production of a patterned retardation film has been described. However, the present invention is not limited to this, and various types of liquid crystal layers are manufactured after an alignment film is formed on a substrate. It can be widely applied to the production of optical films. That is, when the alignment film and the liquid crystal layer are sequentially formed, the alignment of the liquid crystal layer is significantly disturbed by the discharge in the alignment film. Accordingly, by providing a static elimination mechanism, it is possible to significantly improve the quality of various optical films provided with an alignment film and a liquid crystal layer.

  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 UV curable resin 10, 30 Manufacturing process 11 Supply reel 19A, 19B, 24A, 24B, 36A, 36B, 37 Roller 12 Application | coating process 12, 33 Die 17 , 34 Drying process 18, 35 Dryer 19 Molding process 20 Roll plate 23, 38 Ultraviolet irradiation device 24 Intermediate reel 30 Manufacturing process 31 Application process 36 Ultraviolet irradiation process 40 Base material 42 First uneven area 43 Resist layer 44 Second layer Membrane 50 Static elimination mechanism 51 Rotating shaft 52 Arm 53 Static elimination string 54 Winding diameter detection part 55 Static elimination string movable part

Claims (3)

In an optical film manufacturing apparatus in which an alignment film and a liquid crystal layer are sequentially produced on a substrate made of a transparent film,
Pulling out the substrate on which the alignment film has been produced from an intermediate reel, and transporting it to the step of producing the liquid crystal layer,
Neutralizing mechanism is provided we are reducing the charge amount of the base material drawn from the middle reel,
The static elimination mechanism is
A conductive member disposed along a portion that is grounded and from which the base material is peeled off from the intermediate reel;
A winding diameter detector for detecting the winding diameter of the intermediate reel;
An apparatus for manufacturing an optical film, comprising: a movable portion that varies the position of the conductive member by following the change in the winding diameter based on the detection result of the winding diameter detection portion . The optical film manufacturing apparatus according to claim 1, wherein the optical film is a pattern retardation film used for image display by a passive method. In the method for producing an optical film in which an alignment film and a liquid crystal layer are sequentially produced on a substrate made of a transparent film,
Pulling out the substrate on which the alignment film has been produced from an intermediate reel, and transporting it to the step of producing the liquid crystal layer,
Has a neutralization step to reduce the charge amount of the base material drawn from the middle reel,
The step of static elimination includes
A conductive member is disposed along a portion that is grounded and the base material is peeled off from the intermediate reel,
A method for manufacturing an optical film, wherein the position of the conductive member is varied by following the change in the winding diameter based on the detection result of the winding diameter of the intermediate reel .

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