TWI551913B - A manufacturing method of a liquid crystal display element, and a manufacturing system of a liquid crystal display device - Google Patents

Description

Manufacturing method of liquid crystal display element and manufacturing system of liquid crystal display element

The present invention relates to a method of manufacturing a liquid crystal display element and a manufacturing system of the liquid crystal display element.

Patent Document 1 describes a method of manufacturing a liquid crystal display element by sequentially laminating an optical film of a plurality of optical films on a liquid crystal panel. Specifically, the film is fed from a continuous roll in which a film of an optical film is laminated, and a liner film is left, and the film is cut into a specific size (semi-cut) in the film width direction to form a sheet. A material, and a sheet of the release liner is attached to a liquid crystal panel, and a film of the next optical film is sequentially laminated on the optical film laminated on the liquid crystal panel.

Advanced technical literature Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2009-271516

In the case of the above Patent Document 1, in order to sequentially laminate a plurality of sheets of an optical film, high-precision bonding is required. However, in Patent Document 1, it is necessary to continuously transfer the optical film and the liner film in the form of a continuous web fed from a continuous roll to the position where it is attached to the liquid crystal panel, and the half-cut processing mechanism and the liner film of the optical film. The influence of various mechanical errors or control errors such as the peeling processing means, the liquid crystal panel transport processing means, the sheet attaching processing means, and the liner transport processing means makes it difficult to precisely laminate the sheets at the surface position. In order to reduce the amount of deviation between the sheets, the manufacturing speed can be slowed down, but the lower the manufacturing speed, the lower the productivity.

It is assumed that a deviation occurs in the laminate between the sheets, and the adhesive formed on the optical film is exposed, and the exposed adhesive adheres to the foreign matter, which degrades the display quality. In addition, the adhesive which is anxiously exposed to overflow will become a rubber ball when it is transported to the outside, and the rubber ball becomes a foreign matter at the time of bonding. Moreover, if the deviation is large, the anxiety layer is not covered by the display area of the liquid crystal panel.

Further, each sheet must be laminated so as to cover at least the display region (liquid crystal cell) of the liquid crystal panel, and further, it is not preferable to overflow from the end of the liquid crystal panel. In the case where the sheet overflows from the end of the liquid crystal panel and is laminated, the overflow portion must be cut off.

The present invention has been made in view of the above-described actual circumstances, and provides a liquid crystal display element which is manufactured without considering a reduction in the manufacturing speed and which does not cause an overflow (exposure) of the adhesive between the sheets of the laminated layer. Method and manufacturing system of liquid crystal display element.

In order to solve the above problems, the results of the research are repeated until the following invention is completed.

A method for producing a liquid crystal display device of the present invention, comprising a sheet stacking step of two or more optical films, comprising: winding a liner film of an optical film having a specific film width containing a binder; a continuous roller that transports the liner film transfer sub-step; leaving the liner film to cut the optical film at a specific cutting interval in a film width direction orthogonal to the longitudinal direction of the optical film to form an optical film a cutting step of the sheet; a step of transporting the liquid crystal panel; and a layer on the liquid crystal panel side by sandwiching the sheet which has been peeled off from the backing film while the liquid crystal panel is being conveyed In the two or more sheet stacking steps, two or more sheets are sequentially laminated on the liquid crystal panel side for each sheet to form a liquid crystal display element, and laminated on one side of the liquid crystal panel In the two or more sheets, the two sides of the sheet to be laminated next are set to be smaller than the two sides of the four sides of the sheet which has been laminated in the stacking state, and the two or more sheets are set. Winding on a continuous roll The film width of the optical film and the aforementioned cutting interval of the cutting step are set.

This configuration considers the adhesion deviation so that the four sides of the sheet on the side of the next (post) buildup layer are smaller than the four sides of the sheet of the previously laminated layer, and the corresponding side in the laminated state, thereby not It will cause the overflow (exposure) of the adhesive between the sheets which are sequentially laminated.

In the above invention, in the sheet, the side corresponding to the film width of the optical film wound around the continuous roll is the first side, and the first side is orthogonal to the length of the cutting interval. When the side is set to the second side, the following two lamination processes can be performed: the first lamination process (the first sheet lamination step), which is performed by substituting the first side of the preceding sheet of the previous layer. Lowering the first side of the sheet, and stacking the next sheet on the front sheet of the sheet of the preceding sheet corresponding to the second side of the next sheet And the second layering process (the second sheet layering step), wherein the first side of the sheet before the previous layer is laminated corresponds to the second side of the sheet below the next layer, and The second side of the preceding sheet corresponds to the first side of the next sheet, and the next sheet is laminated on the front sheet; or any one of them may be laminated. The order of the first buildup process and the second laminate process is not particularly limited. Further, after the first layering process is performed once or more, the second layering process may be performed once or more, or vice versa. Further, the second layering process may be performed during the plurality of first layering processes, or vice versa.

According to one embodiment of the invention, in the sheet, the film width corresponding to the optical film wound around the continuous roll is set to be the first side, and the first side is orthogonal to the first side and corresponds to the cutting interval. When the side of the length is set to the second side, the first side of one sheet before the previous layer is placed corresponding to the first side of the sheet to be laminated next, and the first sheet of the previous sheet is The two sides of the sheet are stacked on the front sheet, and the second sheet is laminated on the front sheet of the liquid crystal panel to form the first sheet. The film width of the laminated sheet is the largest, and the film width of the laminated film is sequentially reduced, and the film width of the two or more optical films wound on the continuous roll is set; and in the cutting step The first laminated sheet formed in the middle has the largest cutting interval, and the cutting interval of the subsequently laminated sheet is sequentially reduced, and the optical film is cut in the cutting step to form a sheet.

In this configuration, the film width of the first layer laminated on the liquid crystal panel and the specific cutting interval (the length in the direction orthogonal to the film width direction) are maximized, and the sheets after the second sheet are sequentially ordered. By shrinking, the sheet after the second sheet does not overflow from the sheet which is laminated first, and the overflow (exposure) of the adhesive between the sheets of the layer is not generated.

It is preferable to measure the amount of the deviation of the adhesion due to the mechanical error of each of the sheet laminating apparatuses, and to set the film width and the cutting interval of the sheet so as to be smaller than the amount of the deviation.

According to an embodiment of the invention, the method further includes a horizontal rotation step of laminating the liquid crystal panel with the sheet by the attaching sub-step, and before laminating the next sheet by the next attaching sub-step, The conveying direction of the liquid crystal panel is horizontally rotated by 90°; and in the sheet, the side corresponding to the film width of the optical film wound around the continuous roll is referred to as a first side, and is orthogonal to the first side and corresponds to When the side of the length of the cutting interval is the second side, the first side of one sheet before the layer is stacked before the horizontal rotation step corresponds to the second side of the next sheet, and the front side The second side of the one sheet corresponds to the first side of the next sheet, and the next sheet is laminated on the front sheet; so that the first side of the next sheet is smaller than the foregoing The second side of the preceding sheet is set to a film width of the optical film wound around the continuous roll for forming the next sheet; and the second side of the next sheet is smaller than the aforementioned The first side of the previous sheet Type, set the cutting interval and based on the cutting interval in the sub-step of cutting the optical film will be formed by cutting the next sheet piece.

As shown in FIGS. 6 and 7, this configuration is such that after the attachment process of the preceding sheet, the liquid crystal panel is horizontally rotated by 90° with respect to the conveyance direction D, and the next sheet is attached. Since the film width (the first side) of the next sheet is smaller than the cutting interval (the second side) of the previous sheet, and the cutting interval (the second side) of the next sheet is smaller than the film width of the previous sheet (1st side), so the next sheet does not overflow, and there is no overflow (exposure) of the adhesive between the sheets. In the present invention, "90°" of "90° horizontal rotation" includes the range of the difference.

Moreover, it is preferable that the area of all the sheets laminated on the liquid crystal panel is equal to or larger than the display area (the unit cell area) of the liquid crystal panel, and is equal to or less than the surface area of the liquid crystal panel. Further, the film width and the cutting interval of the sheet laminated on the outermost surface of the liquid crystal panel are preferably set based on the display region (liquid crystal cell region) of the liquid crystal panel and the amount of adhesion deviation. The adhesion amount is exemplified by the X-direction deviation amount in the transport direction of the liquid crystal panel, the Y-direction deviation amount in the direction orthogonal to the X direction (film width direction), and the attachment to the transport direction axis (X-axis) of the liquid crystal panel. The rotation deviation of the sheet conveying direction axis, that is, the amount of θ deviation.

According to an embodiment of the present invention, the attaching sub-step of the sheet laminating step for laminating the second sheet or later is preferably such that the central axis of the first sheet in the width direction and the width direction The intersection line of the central axis of the orthogonal direction is laminated with the center line of the width direction direction of the sheet after the second sheet and the center line of the direction orthogonal to the width direction, and the sheet is laminated (see 4A to 4C). According to this configuration, since the sheets can be laminated so that the intersecting lines of the sheets can be aligned or substantially identical, the sheets to be laminated next do not overflow from the sheets stacked previously.

In order to laminate the sheets so that the lines intersect with each other, it is preferable to perform positioning by attaching the sheets of the laminated sheets based on the alignment marks attached to the liquid crystal panel or the end portions or corner portions of the liquid crystal panel. The distance from the alignment mark or the like to the end line of the sheet is proportional to the order of the sheets of the laminated layer. That is, all of the sheets of the laminated layer can be bonded in accordance with the alignment of the panel reference such as the alignment mark of the panel. Further, as another alignment method, a sheet reference alignment method can be employed. In the sheet reference alignment method, the first sheet of the laminated layer is aligned and bonded by an alignment mark or the like, and the sheet laminated after the second sheet is based on the end of the sheet which is bonded to the previous sheet or Corner, align the method of fitting. Since the sheet reference alignment method is more surely adhered to the previously attached sheet than the panel reference, it is preferable.

As an embodiment of the invention, it is preferable that the sheet stacking step of the above two or more is continuously performed. Thereby, since the liquid crystal display element in which the sheet of the optical film is sequentially laminated on the liquid crystal panel can be continuously manufactured, productivity can be improved. Further, as another embodiment, two sheet stacking steps may be continuously performed, or one or more sheet stacking steps may be continuously performed thereafter.

Further, in one embodiment of the invention, one of the optical films is a two-color polarizing film, and the other optical film is a reflective polarizing film; and the step of laminating the two color polarizing films is performed by laminating the two-color polarized light on the liquid crystal panel a sheet of a film; a step of laminating a sheet of the reflective polarizing film, wherein the transmission axis of the sheet of the two color polarizing film and the transmission axis of the sheet of the reflective polarizing film are in the same direction, and the reflective polarizing film is The sheet is attached to the sheet of the two-color polarizing film, and the sheet of the reflective polarizing film is laminated on the liquid crystal panel. In the above configuration, the reflective polarizing film and the two-color polarizing film to which the reflective polarizing film is attached preferably have a transmission axis in a longitudinal direction orthogonal to the film width direction.

Thereby, a two-color polarizing film having a transmission axis in the longitudinal direction (MD direction) and an absorption axis in the film width direction can be used. The longitudinal direction (MD direction) has a transmission axis of the two-color polarizing film, and the longitudinal direction (MD direction) has a transmission axis of the reflective polarizing film, and the two-color polarizing film, the reflective polarizing film, and the liquid crystal panel can be transported. In the same direction, the production line can be made into a straight line without using a complicated mechanism such as a rotating mechanism.

Further, in an embodiment of the invention, further comprising an inspection step of laminating the two color-changing films of the two liquid crystal panels by the sheet stacking step of the two two-color polarizing films The liquid crystal panel is optically inspected; and the sheet stacking step of the reflective polarizing film is performed on the sheet of the two color polarizing film laminated on one surface of the liquid crystal panel after being inspected by the inspection step to make the two colors polarized. The sheet of the film is attached to the sheet of the reflective polarizing film in such a manner that the direction of the transmission axis of the film is the same as the direction of the transmission axis of the sheet of the reflective polarizing film. Thereby, the two-color polarizing film is interposed and the reflective polarizing film is laminated on the liquid crystal panel.

In this configuration, the liquid crystal panel having the two-color polarizing film in the two-layer layer is inspected before the laminated layer is reflected, and the liquid crystal panel is judged to be a good reflection of the polarizing film, and it is determined that the liquid crystal panel of the defective product does not need to have a reflective polarizing film. Yes, it can improve the yield of the reflective polarizing film.

Moreover, the manufacturing system of the liquid crystal display element of another invention is equipped with the sheet-layering apparatus of two or more optical film, and this apparatus is equipped with the lining film of the optical film which laminated the specific film width containing the adhesive agent. The continuous roll is used to transport the liner film transport mechanism; the liner is left, and the optical film is cut at a specific cutting interval in the film width direction orthogonal to the longitudinal direction of the optical film to form an optical a cutting mechanism for a sheet of a film; a conveying mechanism for conveying the liquid crystal panel; and a layer which is laminated on the liquid crystal panel side with the sheet which has been peeled off from the backing film while the liquid crystal panel is being conveyed In addition, two or more sheets are laminated on the liquid crystal panel side in order to form a liquid crystal display element, and laminated on one side of the liquid crystal panel. In the two or more sheets, the above two are set such that each of the four sides of the sheet to be laminated next is smaller than the side corresponding to the four sides of the sheet which has been laminated before the laminated state. The sheet is wound on a continuous roll The film width of the optical film and the aforementioned cutting interval of the cutting mechanism.

This configuration considers the attachment deviation so that each of the four sides of the sheet on the next (post) build-up side is smaller than the four sides of the sheet of the previously laminated layer, and the corresponding side in the laminated state does not occur. The overflow (exposed) of the adhesive between the sheets which are sequentially laminated.

According to one embodiment of the invention, in the sheet, the side corresponding to the film width of the optical film wound around the continuous roll is the first side, and the first side is orthogonal to the first side and corresponds to the cutting. When the side of the length of the interval is the second side, the first side of one sheet before the previous layer is placed corresponding to the first side of the sheet to be laminated next to the sheet, and the sheet of the previous sheet is The second side corresponds to the second side of the next sheet, and the next sheet is laminated on the front sheet; and the sheet is laminated on two or more sheets on one surface of the liquid crystal panel. The film width of the first laminated film is maximized, and the film width of the laminated film is sequentially reduced, and the film width of the two or more optical films wound on the continuous roll is set; and the sheet laminating device is The cutting mechanism cuts the optical film forming sheet so that the cutting interval of the first laminated sheet is maximized, and the cutting interval of the sheet of the area layer is sequentially reduced.

In this configuration, the film width of the sheet laminated on the liquid crystal panel and the cutting interval (the length in the direction orthogonal to the width direction) are maximized, and the sheets of the second sheet and the like are sequentially reduced. The sheet after the second sheet does not overflow from the sheet which is laminated first, and does not cause the overflow (exposure) of the adhesive between the sheets of the laminate.

Furthermore, as one embodiment of the invention, the cutting mechanism for controlling the two or more sheet stacking devices and the control unit of the film transport mechanism may control all of the cutting mechanism and the film transport mechanism. The cut interval of the first laminated sheet is the largest, and the cutting interval of the later laminated sheets is sequentially reduced.

It is preferable to measure the amount of the deviation of the adhesion due to the mechanical error of each of the sheet laminating apparatuses, and to set the film width and the cutting interval of the sheet so as to be smaller than the amount of the deviation. The cutting intervals are stored in advance in the memory of the control unit, and the control unit controls the feed amount of the lining film and the cutting mechanism to perform cutting at the cutting interval. The feed amount can be measured by, for example, detection of an encoder that measures the amount of rotation of a feed roller or the like that constitutes a part of the film transport mechanism.

Further, in an embodiment of the invention, the horizontal rotating portion further includes a liquid crystal panel in which a sheet is laminated by the attaching mechanism, and the lower sheet is laminated on the next sheet by the next attaching mechanism. The conveying direction of the liquid crystal panel is horizontally rotated by 90°, and the side corresponding to the film width of the optical film wound around the continuous roll is the first side, and the first side is orthogonal to the first side. When the side of the length of the cutting interval is the second side, the first side of the sheet before the layer is rotated before the horizontal rotating portion corresponds to the second side of the next sheet. Forming the next piece of the sheet on the front piece of the sheet in a manner in which the second side of the preceding sheet corresponds to the first side of the next sheet; and a side width smaller than the second side of the front sheet, the film width of the optical film wound around the continuous roll for forming the next sheet; and the aforementioned sheet of the next sheet The second side is smaller than the aforementioned first piece of the preceding piece of sheet Manner, setting the cutting interval and the cutting means cutting the optical film based on the cutting interval, the next piece of sheet material is formed.

As shown in FIGS. 6 and 7, this configuration is such that after the attachment process of the preceding sheet, the liquid crystal panel is horizontally rotated by 90° with respect to the conveyance direction D, and the next sheet is attached. Since the film width (the first side) of the next sheet is smaller than the cutting interval (the second side) of the previous sheet, and the cutting interval (the second side) of the next sheet is smaller than the film width of the previous sheet (1st side), so the next sheet does not overflow, and there is no overflow (exposure) of the adhesive between the sheets.

According to an embodiment of the invention, it is preferable that the attaching means for the sheet stacking step of the sheet after the second sheet is formed so that the central axis of the first sheet in the film width direction and the film are The intersection line of the central axis in the direction orthogonal to the width direction is laminated so as to coincide with the line connecting the central axis of the sheet in the film width direction of the second sheet and the film in the direction orthogonal to the film width direction. Sheet. According to this configuration, since the sheets can be laminated so that the intersecting lines of the sheets can be aligned or substantially identical, the sheets to be laminated next do not overflow from the sheets stacked previously.

The attaching mechanism can be attached to any one of the alignment method of the panel reference and the alignment method of the sheet reference.

Moreover, as one embodiment of the invention, the two or more sheet laminating apparatuses are disposed in a continuous production line. Thereby, since the liquid crystal display element in which the sheet of the optical film is sequentially laminated on the liquid crystal panel can be continuously manufactured, productivity can be improved. In addition, as another embodiment, two or more sheet laminating apparatuses may be disposed in a continuous production line, and one or more sheet laminating apparatuses different from each other may be disposed in another (continuous) production line.

Further, in one embodiment of the invention, one of the optical films is a two-color polarizing film, and the other optical film is a reflective polarizing film; and the two-color polarizing film sheet laminating device is formed by laminating the two colors on the liquid crystal panel a sheet for a polarizing film; a sheet stacking device for reflecting a polarizing film, wherein the reflective polarizing film is formed such that a transmission axis of the sheet of the two color polarizing film and a transmission axis of the sheet of the reflective polarizing film are in the same direction The sheet is attached to the sheet of the two-color polarizing film, and the sheet of the reflective polarizing film is laminated on the liquid crystal panel. In this configuration, the reflective polarizing film and the two-color polarizing film to which the reflective polarizing film is attached preferably have a transmission axis in a longitudinal direction orthogonal to the film width.

Thereby, a two-color polarizing film having a transmission axis in the longitudinal direction (MD direction) and an absorption axis in the film width direction can be used. Since the longitudinal direction (MD direction) has the transmission axes of the two-color polarizing film and the reflective polarizing film, and the two-color polarizing film, the reflective polarizing film, and the liquid crystal panel can be transported in the same direction, it is not necessary to use a rotating mechanism or the like. The complex mechanism allows the production line to be a straight line.

Further, in an embodiment of the invention, the inspection apparatus further includes a sheet stacking device of the two color-shifting films, and the liquid crystal panel has a two-area layer 2 color-polarizing film sheet. The panel is optically inspected; and the sheet laminate device of the reflective polarizing film is placed on a sheet of a two-color polarizing film laminated on one surface of the liquid crystal panel after being inspected by the inspection device to make the two-color polarizing film The sheet of the reflective polarizing film is attached in such a manner that the direction of the transmission axis of the sheet is the same as the direction of the transmission axis of the sheet of the reflective polarizing film. Thereby, the reflective polarizing film is laminated on the liquid crystal panel via the two-color polarizing film.

In this configuration, the liquid crystal panel having the two-color polarizing film in the two-layer layer is inspected before the laminated layer is reflected, and the liquid crystal panel is judged to be a good reflection of the polarizing film, and it is determined that the liquid crystal panel of the defective product does not need to have a reflective polarizing film. Yes, it can improve the yield of the reflective polarizing film.

Further, in another method of producing a liquid crystal display device of the present invention, there is provided a sheet stacking step of two or more optical films, which comprises: an optical film having a specific film width containing a plurality of adhesives from adjacent layers. a continuous roll wound with a lining film of the sheet, a step of transporting the lining film of the lining film, a transfer sub-step of transporting the liquid crystal panel, and a step of detaching the lining film from the lining film while transporting the liquid crystal panel The sheet is laminated on the liquid crystal panel side by the adhesion agent, and two or more sheets are sequentially laminated on the liquid crystal panel by the two or more sheet stacking steps. The liquid crystal display element is formed on the panel side, and is laminated on two or more sheets of one surface of the liquid crystal panel, so that the four sides of the sheet to be laminated next are smaller than the four sides of the sheet which has been laminated before. In the method of the side corresponding to the laminated state, the film width of the sheet of the optical film wound on the continuous roll of two or more sheets and the length in the direction orthogonal to the film width are set. Thereby, since the continuous roll can be embedded using a so-called notch, the cutting sub-step described above can be omitted.

According to an embodiment of the invention, in the sheet, a side corresponding to a film width of a sheet wound around the optical film of the continuous roll is referred to as a first side, and corresponds to a direction orthogonal to the film width. When the side of the length is set to the second side, the first side of one sheet before the previous layer is formed, and the first side of the sheet to be laminated next is laminated, and the front side of the sheet is formed. The second side is formed by laminating the next sheet on the front sheet, and the second sheet is laminated on the sheet of one or more of the liquid crystal panels. The film width of the first laminated sheet and the length in the direction orthogonal to the film width are maximized, and the film width of the subsequently laminated sheet and the length in the direction orthogonal to the film width are sequentially reduced. The film width of two or more sheets of the optical film wound on the continuous roll and the length in the direction orthogonal to the film width.

According to an embodiment of the invention, the method further includes a horizontal rotation step of laminating the liquid crystal panel with the sheet by the attaching sub-step, and before laminating the next sheet by the next attaching sub-step, The conveyance direction of the liquid crystal panel is horizontally rotated by 90°; and in the sheet, the side corresponding to the film width of the optical film wound around the continuous roll is referred to as a first side, and corresponds to a direction orthogonal to the film width. When the side of the length is the second side, the first side of the one sheet before the layer is stacked before the horizontal rotation step corresponds to the second side of the next sheet, and the front sheet is The second side of the lower sheet corresponds to the first side of the next sheet, and the next sheet is laminated on the front sheet; and the first side of the next sheet is smaller than the front sheet In the second aspect of the sheet, the film width of the sheet wound around the optical film of the continuous roll is set; and the second side of the next sheet is smaller than the first sheet of the front sheet Side way, set and wrap around The optical film of the length of the film roll of said continuous sheet of a direction perpendicular to the width.

Further, a manufacturing system of a liquid crystal display device according to another aspect of the invention includes a sheet stacking device comprising two or more optical films, the device comprising: an optical film having a specific film width containing a plurality of adhesives from adjacent layers. a continuous roll wound with a lining film of the sheet, a lining film conveying mechanism that transports the lining film, a conveying mechanism that transports the liquid crystal panel, and the sheet that has been peeled off from the lining film while conveying the liquid crystal panel An attachment mechanism that is laminated on the liquid crystal panel side with the above-mentioned adhesive; and two or more sheets are laminated on the liquid crystal panel side for each sheet by the two or more sheet laminating devices And forming a liquid crystal display element, and laminating the two or more sheets of one surface of the liquid crystal panel such that the four sides of the sheet to be laminated next are smaller than the four sides of the sheet which has been laminated before In the manner of the side corresponding to the laminated state, the film width of the sheet of the optical film wound on the continuous roll of two or more sheets and the length in the direction orthogonal to the film width are set. Thereby, since the continuous roll can be embedded using a so-called notch, the cutting sub-step described above can be omitted.

According to an embodiment of the invention, in the sheet, a side corresponding to a film width of a sheet wound around the optical film of the continuous roll is referred to as a first side, and corresponds to a direction orthogonal to the film width. When the side of the length is set to the second side, the first side of one sheet before the previous layer is formed, and the first side of the sheet to be laminated next is laminated, and the front side of the sheet is formed. The second side is formed by laminating the next sheet on the front sheet, and the second sheet is laminated on the sheet of one or more of the liquid crystal panels. The film width of the first laminated sheet and the length in the direction orthogonal to the film width are maximized, and the film width of the subsequently laminated sheet and the length in the direction orthogonal to the film width are sequentially reduced. The film width of two or more sheets of the optical film wound on the continuous roll and the length in the direction orthogonal to the film width.

According to an embodiment of the invention, the horizontal rotating portion further includes a liquid crystal panel in which a sheet is laminated by the attaching means, and the liquid crystal panel is laminated with respect to the liquid crystal before the next sheet is laminated by the next attaching means. The conveying direction of the panel is horizontally rotated by 90°; and in the sheet, the side corresponding to the film width of the optical film wound around the continuous roll is referred to as a first side, and corresponds to a direction orthogonal to the film width. When the side of the length is the second side, the first side of the one sheet before the layer is laminated before the horizontal rotating unit is rotated corresponds to the second side of the next sheet, and the front sheet is The second side of the sheet corresponds to the first side of the next sheet, and the next sheet is laminated on the front sheet; and the first side of the next sheet is smaller than the aforementioned The film width of the sheet wound around the optical film of the continuous roll is set to be the second side of the first sheet; and the second side of the next sheet is smaller than the front sheet The first side of the way, set and wrapped before Length of the film roll of the continuous optical film of the width direction of the sheet perpendicular.

Further, in one embodiment of any one of the above manufacturing methods, the sheet stacking step further includes a film inspection substep of inspecting the optical film, and the cutting substep is preferably performed according to the inspection result of the film inspection substep. Optical film. Inspection refers to checking for defects in the optical film. Further, in the case where the optical film is cut according to the result of the inspection, it is possible to avoid the fact that the defective portion is cut. Preferably, the defective portion is cut into a specific size as a defective product, and is removed by, for example, a removing device so as not to be attached to the liquid crystal panel.

Further, in the above-described embodiment, preferably, in the film inspection sub-step, the optical film is inspected in a state where the liner film is peeled off from the optical film, and after the inspection, the adhesion is interposed. The film is attached to the aforementioned optical film. Thereby, the defect inspection of the optical film can be performed without considering the phase difference inherent in the liner film and the defects such as foreign matter or flaws adhering to the liner film or the like.

Further, in the above-described embodiment, preferably, the cutting step further includes an exclusion sub-step of determining an optical film of the defective product by the inspection result of the film inspection sub-step, cutting into a specific size, and The sheet of the optical film judged to be defective was excluded. In the case of the defect inspection, the defective product is cut into a specific size (referred to as a jump cut) in a manner avoiding the defective portion of the optical film, and the sheet containing the defect determined to be defective is borrowed. It is excluded (removed) by, for example, a known exclusion device. Thereby, the yield of the optical film can be greatly improved.

The optical film may be an optical film of a single layer as long as it contains an adhesive layer on the outermost layer, or may be a laminated optical film in which an optical film is laminated. Further, it is also possible to have a structure in which another film member is laminated on the optical film. Further, examples of the optical film include a polarizer and a polarizing film, and the polarizing film is formed by a polarizer and a double-sided or single-layer polarizer protective film. Further, there is also a case where a surface protective film for protecting a polarizer or a polarizing film from transport defects is laminated. Further, as another optical film, an optical compensation film such as a retardation film or a brightness enhancement film is exemplified. As the laminated optical film, a retardation film and/or a brightness enhancement film may be laminated on the polarizer or the polarizing film.

The polarizing film may, for example, be a two-color polarizing film. The two-color polarizing film is a step of obtaining a polarizer by (A) drying a polyvinyl alcohol-based film subjected to dyeing, crosslinking, and stretching treatment; (B) unilateral or two of the polarizer The step of bonding the protective layer on the side; (C) the manufacturing method of the step of performing heat treatment after bonding. The respective processes of dyeing, crosslinking, and stretching of the polyvinyl alcohol-based film need not be carried out separately, and may be carried out simultaneously, and the order of each treatment may be arbitrary. Further, as the polyvinyl alcohol-based film, a polyvinyl alcohol-based film which has been subjected to swelling treatment can also be used. In general, a polyvinyl alcohol-based film is immersed in a solution containing iodine or a dichroic dye, and is immersed in iodine or a dichroic dye to be dyed, washed, and stretched in a solution containing boric acid or borax. Drying is carried out after stretching 3 times to 7 times uniaxially. After stretching in a solution containing iodine or a dichroic dye, it is further stretched (two-stage stretching) in a solution containing boric acid or borax or the like, and then dried, whereby the alignment of iodine is increased. The polarizing property is improved, so that it is preferable.

The brightness enhancement film may, for example, be a reflective polarizing film having a reflection axis and a transmission axis. The reflective polarizing film is obtained by, for example, stretching a plurality of polymer films A and B of two different materials into a plurality of layers. In the direction of stretching, only the refractive index of the material A increases, and the birefringence is found. The stretching direction of the material AB interface having the refractive index difference is the reflection axis, and the direction in which the refractive index difference is not generated (non-stretching direction) is the transmission axis. .

Moreover, the adhesive agent contained in the optical film is not particularly limited, and examples thereof include a propylene-based pressure-sensitive adhesive, an oxime-based pressure-sensitive adhesive, and a urethane-based pressure-sensitive adhesive. As the liner film, for example, a film of a plastic film (for example, a polyethylene terephthalate film, a polyolefin film, or the like) can be used. Further, if necessary, those which are subjected to coating treatment with a suitable release agent such as a lanthanide or a long-chain alkyl group, a fluorine-based or a molybdenum sulfide, or the like can be used.

(optical film and continuous roll)

This embodiment is not limited to the form in which an optical film is formed on the liner film. For example, it may be formed by winding a continuous roll in the form of a roll. The continuous roll may, for example, be one in which (1) an optical film laminate having a liner film and an optical film containing an adhesive formed on the liner film is wound into a roll. In this case, the manufacturing system of the liquid crystal display element has a cutting mechanism for forming a sheet of the optical film from the optical film, which is left without cutting the liner film, and the optical film (containing the adhesive) is specified. The cutting interval is cut (half cut). In the cutting, for example, the sheet of the good product may be cut off from the sheet of the defective product based on the inspection result of the defect inspection device in the manufacturing system.

Moreover, as a continuous roll, for example, (2) the optical film laminated body which has a sheet|seat and the sheet|membrane containing the optical film of the adhesive agent formed on this lining film is wound into the roll shape (so-called gap. A continuous roll embedded in an optical film).

(liquid crystal display element)

The liquid crystal display element is a sheet in which at least one (two colors) polarizing film is formed on one side or both sides of the liquid crystal panel, and a driving circuit is required to be mounted as needed. As the liquid crystal panel, for example, any of a vertical alignment (VA) type, a planar switch (IPS) type, or the like can be used. The liquid crystal panel 4 shown in FIG. 1 is configured such that the liquid crystal layer is sealed between the pair of substrates (the first substrate and the second substrate).

(Embodiment 1)

(Method of Manufacturing Liquid Crystal Display Element)

Embodiment 1 will be described below. The method for producing a liquid crystal display device includes a sheet stacking step of two or more optical films, and the step includes: transferring a continuous roll obtained by winding a liner film of an optical film having a specific film width containing a pressure-sensitive adhesive layer thereon a lining film transporting sub-step of the lining film; leaving the lining film, cutting the optical film at a specific cutting interval in a film width direction orthogonal to the longitudinal direction of the optical film to form a sheet of the optical film a sub-step; a transfer sub-step of transporting the liquid crystal panel; and a step of attaching the sheet which has been peeled from the liner film to the liquid crystal panel side via the adhesive while transferring the liquid crystal panel; In the two or more sheet stacking steps, two or more sheets are sequentially laminated on the liquid crystal panel side for each sheet to form a liquid crystal display element. Further, two or more sheets laminated on one surface of the liquid crystal panel are set so that the film width of the first laminated sheet is maximized, and the film width of the laminated sheet is sequentially reduced. The film width of the optical film wound around the continuous roll. The cutting step is carried out so that the cutting interval of the sheet of the first layer formed in the cutting step is maximized, and the cutting interval of the sheet after the layer is sequentially reduced. In the present embodiment, the side corresponding to the film width of the optical film wound around the continuous roll is referred to as a first side, and is orthogonal to the first side and corresponds to the length of the cutting interval. When the side is set to the second side, the first side of one sheet before the previous layer is formed, and the first side of the sheet next to the next sheet is laminated, and the second sheet of the previous sheet is used. The next piece of the sheet is laminated on the front piece of the sheet in a manner corresponding to the second side of the next sheet.

Hereinafter, one of the optical films will be described as a two-color polarizing film, and the other optical film will be described as a reflective polarizing film. Further, the optical film laminated on the liquid crystal panel is not limited thereto, and may be another optical film, and the third (later) optical film may be laminated in the same sheet stacking step.

The sheet stacking step of the two-color polarizing film is performed by laminating a sheet of two color polarizing films on the liquid crystal panel, and the sheet laminating step of the reflective polarizing film is a sheet of the reflective polarizing film laminated on the sheet of the two-color polarizing film. . In this case, the two-color polarizing film and the reflective polarizing film are described as having a transmission axis in the longitudinal direction orthogonal to the film width direction. Further, in the present embodiment, the sheet stacking step of the two-color polarizing film and the sheet stacking step of the reflective polarizing film are continuously performed.

Fig. 1 is a flow chart showing an example of a method of manufacturing a liquid crystal display element. The step of laminating the sheets of the two color polarizing films laminated on the liquid crystal panel will be described. A continuous roll (S1) of a 2-color polarizing film was prepared. The film width W1 of the two-color polarizing film is larger than the film width W2 (W1>W2) of the reflective polarizing film laminated on the two-color polarizing film. The two-color polarizing film and the liner film are sent out from the continuous roll, and are conveyed to the downstream side (film transfer sub-step, S2). The conveying means is constituted by, for example, a feed roller, a tension roller, a regulating roller, a sensor for inspecting the feed amount, a control unit for controlling the conveyance speed or the feed amount, and the like.

The liner film is left, and the two-color polarizing film is cut at a specific slit width L1 orthogonal to the longitudinal direction of the two-color polarizing film to form a sheet of the two-color polarizing film (cutting step) , S3). Examples of the cutting mechanism include a laser device, a cutter, and other cutting mechanisms.

The lining film was set to the inside, and was folded back at the tip end portion of the peeling mechanism, and the two-color polarizing film was peeled off from the lining film and supplied to the attaching position. When the liquid crystal panel is conveyed, the sheet of the two-color polarizing film which has been peeled off from the lining film is laminated on the liquid crystal panel side via an adhesive (attachment substep, S4). As the attaching means, for example, a pair of rollers for attachment can be mentioned. Further, there is a winding sub-step of winding a liner film of the peeled sheet, and a transport sub-step of transporting the liquid crystal panel to the attaching position. Further, in the transport sub-step, the liquid crystal panel to which the two-color polarizing film is attached is transported to a position where it is attached to the next reflective polarizing film. The conveying means of the liquid crystal panel is configured, for example, by a pairing roller for the attachment, a conveying roller, an adsorption plate, a control unit for controlling the conveying speed or the feed amount, and the like.

Next, a step of laminating a sheet of a reflective polarizing film laminated on a two-color polarizing film will be described. A continuous roll (S11) for reflecting the polarizing film is prepared. The film width W2 of the reflective polarizing film is made smaller than the width W1 of the laminated two color polarizing film (see FIGS. 4A and 4B, and W2 < W1). The reflective polarizing film and the liner film are sent out from the continuous roll and conveyed to the downstream side (liner transfer substep, S12).

The liner film is left, and the reflective polarizing film is cut at a specific slit width L2 in the film width direction orthogonal to the longitudinal direction of the reflective polarizing film to form a sheet for reflecting the polarizing film (cutting step, S13) ). Here, the cutting interval L2 of the reflective polarizing film is smaller than the cutting interval L1 of the two-color polarizing film (see FIGS. 4A and 4B and L2 < L1).

The lining film was placed inside, and was folded back at the tip end portion of the peeling mechanism, and the reflective polarizing film was peeled off from the lining film and supplied to the attaching position. Further, while the liquid crystal panel is being conveyed, the sheet of the reflective polarizing film which has been peeled off from the liner film is adhered to the two-color polarizing film via the adhesive (the attaching step, S14). The attachment mechanism is the same as the attachment mechanism described above. In the transfer sub-step, the liquid crystal panel to which the reflective polarizing film is attached is transported to the next step.

In another embodiment of the above-described embodiment, when a reflective polarizing film having a transmission axis in a longitudinal direction orthogonal to the film width direction is laminated on a two-color polarizing film having a transmission axis in the film width direction, the liquid crystal panel is transported. The route is formed in an L shape, and after the liquid crystal panel laminates the sheets of the two color polarizing films, the liquid crystal panel is transported along the L-shaped transport path, and the sheet of the polarizing film is reflected so that the transmission axis directions are the same. The direction of the layer is laminated on the sheet of the two-color polarizing film.

Further, in another embodiment of the above embodiment, the sheet stacking step further includes a film inspection substep of inspecting the optical film, and the cutting substep is performed by cutting the optical film according to the inspection result of the film inspection substep. Furthermore, the cutting sub-step further includes an exclusion sub-step of cutting the optical film judged to be defective into a specific size by using the inspection result of the film inspection sub-step (cutting in a manner avoiding the defect (so-called Jump cutting)), excluding the sheet of the optical film judged to be defective. Further, the film inspection sub-step can also read the defect information previously attached to the optical film or the liner film, and cut off the defect in a manner avoiding the defect based on the defect information. As a defect inspection method, for example, an image in which transmitted light or reflected light is imaged on an optical film, and the image is subjected to image processing, and the defect is analyzed to determine whether it is a good product or a defective product. Furthermore, the image processing algorithm can be applied to a known method, and the defect can be detected by, for example, using the shading of the binarization process. The information on the defect obtained in the defect inspection is connected to the position information (for example, the position coordinate) and transmitted to the control device (not shown), which helps to cut off the sub-step cutting process.

Further, as another embodiment, in the film inspection sub-step, it is preferable to perform inspection of the optical film in a state where the liner film is peeled off from the optical film, and after the inspection, the liner film is interposed with the adhesive. Optical film.

Further, in the above-described embodiment, a method of sequentially laminating a two-color polarizing film and a reflective polarizing film on one surface of a liquid crystal panel has been described, but the present embodiment is not limited to this configuration. A two-color polarizing film may be laminated on the other side of the liquid crystal panel. In this case, the transmission axis of the two-color polarizing film laminated on one surface of the liquid crystal panel is laminated so that the transmission axis of the two-color polarizing film laminated on the other surface is a crossed polarizer.

(Manufacturing system of liquid crystal display element)

Hereinafter, a manufacturing system of a liquid crystal display element of the first embodiment will be described with reference to Fig. 3 . A manufacturing system of a liquid crystal display device includes a sheet stacking device of two or more optical films, and the apparatus includes a continuous roll formed by winding a film of a film having a specific film width including a pressure-sensitive adhesive, and transporting the film a lining film conveying mechanism for the lining film; the lining film is cut, and the optical film is cut at a specific cutting interval in a film width direction orthogonal to the longitudinal direction of the optical film to form a sheet of the optical film. The mechanism for transporting the liquid crystal panel; and the attachment mechanism that laminates the sheet that has been peeled off from the liner film to the liquid crystal panel side while interposing the sheet that has been peeled off from the liner film. By the two or more sheet stacking apparatuses, two or more sheets, each of which is sequentially laminated on the liquid crystal panel side to form a liquid crystal display element. Further, the manufacturing system has a method of controlling the cutting mechanism and the control unit of the liner conveying mechanism so that the cutting interval of the sheet to be laminated first is maximized, and then the cutting interval of the laminated sheets is sequentially reduced; The cutting mechanism of the material layering apparatus cuts the optical film so that the cutting interval of the first laminated sheet is maximized, and the cutting interval of the laminated sheet is sequentially reduced. In other words, the relationship between the cutting intervals L of the sheets (the first sheet, the second sheet, the nth sheet, the n+1th sheet, and the . . ) laminated in the liquid crystal panel in this order is L _n > L _n+1 .

Hereinafter, the two sheets laminated on one surface of the liquid crystal panel are a two-color polarizing film and a reflective polarizing film. However, the present invention is not limited thereto, and may be another optical film, or the same sheet stacking device may be used to laminate the third sheet. (after) optical film.

The two sheet stacking devices are a sheet stacking device 301 for laminating a sheet of two color polarizing films, and a sheet stacking device 302 for laminating a sheet of a polarizing film on a sheet of a two-color polarizing film. In the present embodiment, the sheet stacking device 301 of the two-color polarizing film and the sheet stacking device 302 of the reflective polarizing film are disposed in a continuous production line. The film width W1 of the two-color polarizing film is larger than the film width W2 of the reflective polarizing film (see FIGS. 4A to 4B). In the present embodiment, the two-color polarizing film has a transmission axis in the longitudinal direction and an absorption axis in the film width direction. Further, the reflective polarizing film has a transmission axis in the longitudinal direction and a reflection axis in the film width direction. Further, the film width W1 of the two-color polarizing film is related to the film width W2 of the reflective polarizing film.

The sheet stacking apparatus 301 of the two-color polarizing film shown in FIG. 3 has a liner conveyance mechanism 101, a liquid crystal panel conveyance mechanism 102, and an attachment mechanism 103 (adhesion roller 50a and drive roller 50b). Further, the sheet stacking device 302 that reflects the polarizing film includes a liquid crystal panel transport mechanism 202, a liner transport mechanism 201, and an attaching mechanism 203 (adhesive roller, drive roller). In the present embodiment, the sheet 131 of the two-color polarizing film is attached from the upper side of the liquid crystal panel 4, and the sheet 231 on which the polarizing film is reflected is attached from the upper side of the liquid crystal panel 4. Furthermore, it is not limited to the attachment method, and for example, a sheet of a two-color polarizing film may be attached from the lower side of the liquid crystal panel, and a sheet of the reflective polarizing film may be attached from the lower side of the liquid crystal panel, or may be a liquid crystal. An optical film is attached to the upper side of the panel, and another optical film is attached from the lower side of the liquid crystal panel.

(liquid crystal panel transport mechanism)

The liquid crystal panel transport mechanism 102 transports and supplies the liquid crystal panel 4 to the attaching mechanism 103. In the present embodiment, the liquid crystal panel transport mechanism 102 is configured to include a transport roller 80, an adsorption plate, and the like. The liquid crystal panel 4 is transported to the downstream side of the production line by rotating the transfer roller 80 or transferring the adsorption plate.

(liner transport mechanism)

The lining film transport mechanism 101 sends a lining film 12 in which a two-color polarizing film 13 containing an adhesive is laminated from the continuous roll 1, and leaves the lining film 12, and cuts the two color polarizing film 13 at a specific cutting interval L1. A sheet 131 of a two-color polarizing film is formed on the backing film 12, and the backing film 12 is inside, and is folded back at the front end of the peeling mechanism 40, and the sheet 131 (containing an adhesive) of the two color polarizing film is removed from the backing film. 12 is peeled off and supplied to the attaching mechanism 103. Therefore, the liner conveying mechanism 101 has the cutting mechanism 20, the regulating roller 30, the peeling mechanism 40, and the winding mechanism 60.

The cutting mechanism 20 fixes the liner film 12 by the suction mechanism 20a, leaves a liner film, cuts the two-color polarizing film 13 at a predetermined interval L1, and forms a sheet 131 of a two-color polarizing film on the liner film 12. Examples of the cutting mechanism 20 include a cutter, a laser device, and the like.

The dancer roller 30 has a function of maintaining the tension of the liner film 12. The liner conveying mechanism 101 conveys the liner 12 via the regulating roller 30.

In the case where the liquid crystal panel 4 is attached to the sheet 131, the peeling mechanism 40 folds the backing film 12 inward at the front end portion thereof, and peels the sheet 131 from the backing film 12. In the present embodiment, the peeling mechanism 40 uses a sharp knife edge portion at the distal end portion, but the present invention is not limited thereto.

The winding mechanism 60 winds the liner film 12 of the peeled sheet 131. Further, a feed roller may be further provided between the attaching mechanism 103 and the winding mechanism 60.

(attachment mechanism)

The attaching mechanism 103 is provided with a pressure-sensitive adhesive, and a sheet 131 of a two-color polarizing film supplied from the film transport mechanism 101 is attached from the upper side of the liquid crystal panel 4 supplied from the liquid crystal panel transport mechanism 102. In the present embodiment, the attaching mechanism 103 is constituted by the attaching roller 50a and the driving roller 50b.

(Control Department)

The control unit 300 controls the cutting mechanism 20 and the liner transport mechanism 101 to control the cutting interval L1 of the sheet 131 of the two-color polarizing film. The cutting interval L1 is a length in a direction orthogonal to the film width direction of the sheet 131 of the two-color polarizing film (see FIGS. 4A to 4C). The control unit 300 controls the cutting mechanism 20 and the liner transport mechanism 101 so that the cutting interval L1 of the two-color polarizing film is maximized, and the cutting interval L2 of the reflective polarizing film is less than L1. For example, the control unit 300 controls the feed amount and the cutting process of the liner film so that the cutting intervals L1 and L2 are stored in advance in the memory of the control unit 300 and the cutting is performed at the specific intervals L1 and L2. The feed amount can be measured by, for example, detecting an encoder that measures the amount of rotation of a feed roller or the like that forms part of the film transport mechanisms 101, 201.

Next, a sheet laminating apparatus 302 that reflects a polarizing film will be described. The sheet stacking device 302 of the reflective polarizing film is attached to the sheet 131 of the two color polarizing film laminated on the liquid crystal panel 4, and is attached to the sheet 231 which reflects the polarizing film, and is laminated with the sheet of the two color polarizing film. Since the configuration of the device is the same, it will be briefly described.

The liquid crystal panel transport mechanism 202 transports the liquid crystal panel 4 to which the sheet 131 is attached by the attaching mechanism 103, and supplies it to the attaching mechanism 203.

The lining film transport mechanism 201 can be configured similarly to the lining membrane transport mechanism 101, and the affixing mechanism 203 can be configured similarly to the attaching mechanism 103. For example, the adjustment roller may be configured in the same manner as the adjustment roller 30, and the winding mechanism may be configured in the same manner as the winding mechanism 60. The attachment roller and the driving roller may be configured in the same manner as the attachment roller 50a and the driving roller 50b.

The cutting mechanism 20 fixes the liner 22 with the adsorption mechanism 20a, leaves the liner 22, cuts the reflective polarizing film 23 at a specific interval L2 (L1>L2), and forms a sheet of the reflective polarizing film on the liner film 22. 231.

The attaching mechanism 203 is provided with an adhesive, and the reflective polarizing film supplied from the liner transport mechanism 201 is attached to the upper surface of the liquid crystal panel 4 supplied from the liquid crystal panel transport mechanism 202 to the sheet 131 of the two-color polarizing film. Sheet 231. The attaching mechanism 203 is preferably such that the central axis of the width direction of the sheet 131 of the two-color polarizing film intersects with the central axis of the direction orthogonal to the width direction (the broken line P1 of FIG. 4A), and the reflective polarizing film. The central axis of the width direction of the sheet 231 is aligned or substantially coincident with the line of intersection with the central axis of the direction orthogonal to the width direction (the broken line P2 of FIG. 4B), and is laminated on the sheet 131 of the two-color polarizing film. A sheet 231 of a polarizing film. The reason for this is that it is preferable to consider the amount of deviation (X-direction deviation, Y-direction deviation, θ deviation), and laminate sheets.

The control unit 300 controls the cutting mechanism 20 and the liner transport mechanism 201 to control the cutting interval L2 of the sheet 231 that reflects the polarizing film. The cutting interval L2 is a length in a direction orthogonal to the film width direction of the sheet 231 of the reflective polarizing film (see FIGS. 4A to 4C). The control unit 300 controls the cutting mechanism 20 and the liner transport mechanism 201 such that L2 of the reflective polarizing film is smaller than L1 of the two-color polarizing film.

In the liquid crystal panel transport mechanism 204, the liquid crystal panel in which the sheet 131 of the two color polarizing film and the sheet 231 which reflects the polarizing film are laminated is conveyed to the downstream side.

In addition, on the other side of the liquid crystal panel on which the sheet is not laminated, an optical film such as a sheet of a two-color polarizing film may be attached to another surface of the liquid crystal panel on which the sheet is not laminated.

Further, an inspection device for inspecting a liquid crystal display element having a two-color polarizing film or the like in two area layers may be provided on the downstream side of the conveyance. The inspection purpose and inspection method of the inspection apparatus are not particularly limited.

(Embodiment 2)

In the manufacturing method of the second embodiment, the sheet-layering process of the two color-shifting films is performed on the sheet of the two-layer color-polarizing film of the liquid crystal panel, and then the inspection step of optically inspecting the liquid crystal panel is performed. After the inspection step is inspected, the sheet stacking step of the reflective polarizing film is carried out, and the sheet having the two color polarizing film laminated on one surface of the liquid crystal panel is laminated to have a transmission layer of the sheet having the two color polarizing film. A sheet of a reflective polarizing film having a transmission axis in the same direction as the direction of the axis. In the present embodiment, the sheet stacking step of the two two-color polarizing films, the inspection step, and the sheet stacking step of the reflective polarizing film are continuously performed, but the present invention is not particularly limited thereto. The sheet laminating step of two two-color polarizing films is continuously performed; the sheet laminating step and the inspecting step of two two-color polarizing films may be continuously performed; and the inspecting step and the sheet laminating step of the reflective polarizing film may be continuously performed.

A manufacturing flow chart of the second embodiment is shown in Fig. 2 . First, a sheet of two color polarizing films (a sheet laminating step of two color polarizing films, S21) is attached to one surface of a liquid crystal panel. Next, a sheet of two color polarizing films (a sheet laminating step of two color polarizing films, S22) is attached to the other surface of the liquid crystal panel. The sheet stacking step of the two-color polarizing film is the same as the steps of the steps S1 to S4 of the above-described first embodiment. Further, the transmission axis of the two-color polarizing film laminated on one surface of the liquid crystal panel is laminated so that the transmission axis of the two-color polarizing film laminated on the other surface thereof is a crossed polarizing mirror.

Next, the liquid crystal panel in which the two-color polarizing film was attached to both surfaces was irradiated with light on the surface of the two-color polarizing film as the back side (backlight side), and the reflected optical image was taken. Further, light was irradiated onto the surface of the two-color polarizing film as the backlight side (back side), and the transmitted optical image was taken. The image data obtained by the photographing is subjected to image processing to determine whether or not there is a defect such as a foreign matter or a bubble interposed between the two-color polarizing film or between the two-color polarizing film and the liquid crystal panel (inspection step, S23). When it is judged that it is a good product (normal product), the liquid crystal display panel is conveyed to the attachment position with the reflective polarizing film. Further, a sheet of a reflective polarizing film (a step of laminating a sheet of a reflective polarizing film, S25) is attached to the two-color polarizing film on the back side of the liquid crystal display panel. The sheet stacking step of the reflective polarizing film is the same as the steps of the steps S11 to S14 of the first embodiment. In addition, the transmission axis of the two-color polarizing film is laminated so that the transmission axes of the reflective polarizing films laminated on the two color polarizing films are in the same direction. On the other hand, when it is determined that the product is defective, the liquid crystal panel is transported to the defective port to be excluded (excluding step, S26).

(manufacturing system)

The manufacturing system of the second embodiment will be described below with reference to Fig. 5 . In the present embodiment, the sheet layering apparatus, the inspection apparatus, and the sheet-layering apparatus of the reflective polarizing film of the two two-color polarizing films are disposed in a continuous production line. However, the present invention is not particularly limited thereto, and a two-color polarizing film can be used. The sheet stacking device is disposed in a continuous production line, and the sheet stacking device and the inspection device of the two 2-color polarizing films can be disposed on the continuous production line, and the sheet stacking device of the inspection device and the reflective polarizing film can be disposed in the continuous production line. .

The sheet stacking apparatuses 501 and 502 shown in Fig. 5 have the same configuration as the sheet stacking apparatus of the two color polarizing films of the first embodiment. The sheet layering apparatus 501 is a sheet 131 of a color polarizing film which is laminated on the visual side of the liquid crystal panel, and the sheet layering apparatus 502 is a sheet 131 of a color polarizing film laminated on the back side (backlight side) of the liquid crystal panel. In the sheet stacking apparatuses 501 and 502, if the transmission axes of the sheets of the two color polarizing films laminated on both surfaces of the liquid crystal panel are orthogonal polarizers, the sheet can be laminated from the upper side of the liquid crystal panel as in the first embodiment. The sheet can be laminated from the lower side of the liquid crystal panel. According to the needs, it can also have a 90° horizontal rotation mechanism, an up-and-down reversing mechanism, and the like.

The liquid crystal panel having a sheet of two color polarizing films on two areas is transported to the inspection apparatus 400 by the liquid crystal panel transport mechanism 202. The inspection device 400 performs optical inspection of the liquid crystal panel. The inspection device 400 vertically irradiates light to the surface on the back side of the liquid crystal panel that is transported (from the top to the bottom in FIG. 5). The light from the illuminating unit 401 is reflected by a half mirror (not shown) to illuminate the liquid crystal panel. The reflected optical image generated by the illumination is imaged by the imaging unit 402. Further, the transmission optical image is captured by the imaging unit 403. The image data obtained by the imaging is subjected to image processing by the information processing unit of the inspection apparatus 400, and the defect is analyzed, and the determination unit determines whether it is a good product or a defective product.

Then, the sheet laminated device 503 of the reflective polarizing film having the same configuration as that of the first embodiment is laminated on the sheet 131 of the two-color polarizing film which is laminated on the back surface side of the liquid crystal panel, after being inspected by the inspection apparatus 400. The sheet 231 of the reflective polarizing film is attached so that the direction of the transmission axis of the sheet 131 of the two-color polarizing film is the same as the direction of the transmission axis of the sheet 232 of the reflective polarizing film. In the liquid crystal panel which is judged to be a good result by the inspection, the sheet laminating apparatus 503 attaches the sheet 231 which reflects the polarizing film to the sheet 131 of the two-color polarizing film. The liquid crystal panel that judges the result of the inspection as a defective product is transported to the defective port to be excluded. Further, the liquid crystal panel of the defective product can be transported to the defective port by the liquid crystal panel transport mechanism 202, the attaching mechanism 203, and the transport mechanism 204.

The operation timing of each of the above-described mechanisms and devices is calculated by, for example, a method of arranging a sensor at a specific position, or a rotary encoder or the like for detecting a rotating member of a transport mechanism or a transport mechanism. The control unit can be realized by a software program in cooperation with hardware resources such as a CPU and a memory. In this case, the program software, the processing program, various settings, and the like are stored in advance in the memory. Further, it may be constituted by a dedicated circuit, firmware, or the like.

(Embodiment 3)

The manufacturing method and the manufacturing system according to the third embodiment are basically the configuration of the first embodiment described above, and further include the attaching substep of the first sheet (the attaching mechanism 103), and then attaching the second sheet before attaching the second sheet. The horizontal rotation step (horizontal rotation portion 90) in which the liquid crystal panel 4 is horizontally rotated by 90° with respect to the conveyance direction D (see FIGS. 6 and 7). Since the constituent elements of the third embodiment have the same constituent elements as those of the first embodiment, and the constituent elements of Figs. 6 and 7A to 7C are the same as those of Figs. 3 and 4A to 4C, which are identical to the reference numerals, the respective constituent elements are omitted. The description of the constituent elements will be described below, and the different configurations will be described below.

As shown in FIGS. 6 and 7A to 7C, the first sheet 131 is laminated on the liquid crystal panel 4. Further, before the first sheet 131 is laminated with the second sheet 231, the liquid crystal panel 4 is horizontally rotated by 90° with respect to the conveyance direction D. Next, the second sheet 231 is laminated on the first sheet 131. At the time of the attachment, the first side of the first sheet 131 (the film width of the optical film wound around the continuous roll) and the second side of the second sheet 231 are specified by the cutting mechanism. The cutting edge is cut (the side in the thickness direction of the laminate), and the second side of the first sheet 131 (the side cut by the cutting mechanism at a specific cutting interval) and the second sheet are used. The first side of the sheet 231 (the film width of the optical film wound around the continuous roll) corresponds to the upper and lower sides (the thickness direction of the laminate).

For example, the horizontal rotating unit 90 is configured such that the liquid crystal panel 4 is moved upward, and the liquid crystal panel transport mechanism (for example, the transport roller 80) is detached, and then horizontally rotated by 90°, and then placed on the transport roller 80. However, it is not limited thereto, and may be other institutions.

After laminating the second sheet 231, a third sheet may be laminated. In this case, the liquid crystal panel may be horizontally rotated by 90° again before the third sheet is laminated.

(Example)

Using the sheet laminating apparatus of the first embodiment, a sheet of a retardation film (first sheet), a sheet of a two-color polarizing film (second sheet), and a sheet of a retardation film are sequentially laminated on one surface of a liquid crystal panel (32 inches). A sheet of reflective polarizing film (third sheet). In each of Examples 1 and 2 and Comparative Example 1, the number of evaluation samples was set to 100 (n=100). Table 1 shows the film width W1 of each of the retardation film of the first sheet of the liquid crystal panel, the two-color polarizing film of the second sheet, and the reflective polarizing film of the third sheet of the first embodiment and the second comparative example. W2, W3, cut off the size relationship of the intervals L1, L2, L3, and the actual size of these is shown in Table 2. In addition, Table 2 shows the maximum value (the width direction (Y direction) in the film width direction and the X direction) in the longitudinal direction (the direction in which the liquid crystal panel is transported), and the defect occurrence rate (%) by visual inspection. The amount of deviation is such that the third sheet overflows from the second sheet, the length of the adhesive (viscose) of the third sheet is exposed (the amount of adhesive exposure), or the second sheet is from the first sheet. The material overflows, and the maximum length of the adhesive of the second sheet (adhesive) is exposed, and is measured by a digital vernier caliper. The evaluation items for bad judgment are set to adhesive defects, dirt, and foreign matter.

From the results of Example 1, it was confirmed that the film width and the cutting interval of the sheet were W1>W2>W3 and L1>L2>L3, and the third sheet was not from the second sheet. The sheet overflows, and the second sheet can be bonded without overflowing the first sheet. On the other hand, from the results of Comparative Example 1, the film width (W1 = W2 = W3) and the cutting interval (L1 = L2 = L3) of the first sheet, the second sheet, and the third sheet are the same. In other words, the second sheet cannot be attached without overflowing from the first sheet, and the third sheet cannot be attached without being overflowed from the second sheet. Further, in Comparative Example 2, the third sheet did not overflow from the first sheet but overflowed from the second sheet. Therefore, in Comparative Example 1 and Example 2 in which the adhesive agent was not exposed, the defect generation rate was 0%, and defects such as adhesive defects, dirt, and foreign matter were observed.

Further, from the results of Example 1, it was confirmed that it is preferable to set the first sheet, the second sheet, and the third sheet in consideration of the film width direction and the maximum deviation amount in the direction orthogonal to the film width direction. Film width, cutting interval (W1 ≧ (W2+ width direction maximum deviation amount) ≧ (W3 + width direction maximum deviation amount), L1 ≧ (L2+ length direction maximum deviation amount) ≧ (L3 + length direction maximum deviation amount). The maximum deviation amount can be set according to the result of long-term operation of the manufacturing system.

1. . . Continuous roll

2. . . Continuous roll

4. . . LCD panel

12. . . Lining film

13. . . 2-color polarizing film

20. . . Cutting mechanism

20a. . . Adsorption mechanism

twenty two. . . Lining film

twenty three. . . Reflective polarizing film

30. . . Adjustment roller

40. . . Stripping mechanism

50a. . . Attaching roller

50b. . . Drive roller

60. . . Winding mechanism

80. . . Transfer roller

90. . . Horizontal rotation

101. . . Liner conveying mechanism

102. . . Liquid crystal panel transport mechanism

103. . . Attachment mechanism

131. . . 2 color polarizing film sheet

201. . . Liner conveying mechanism

202. . . Liquid crystal panel transport mechanism

203. . . Attachment mechanism

204. . . Liquid crystal panel transport mechanism

231. . . Sheet of reflective polarizing film

300. . . Control department

301. . . Two-color polarizing film sheet laminating device

302. . . Sheet laminate device for reflecting polarizing film

400. . . Inspection device

401. . . Irradiation department

402. . . Camera mechanism

403. . . Camera mechanism

501. . . Sheet laminating device

502. . . Sheet laminating device

503. . . Sheet laminate device for reflecting polarizing film

Fig. 1 is a flow chart showing a method of manufacturing a liquid crystal display element of the first embodiment.

Fig. 2 is a flow chart showing a method of manufacturing a liquid crystal display element of the second embodiment.

Fig. 3 is a view for explaining a manufacturing system of a liquid crystal display element of the first embodiment.

Fig. 4A is a schematic view showing a state in which a first sheet is laminated on a liquid crystal panel in the first embodiment.

Fig. 4B is a schematic view showing a state in which a second sheet is laminated on a liquid crystal panel in the first embodiment.

Fig. 4C is a schematic view showing a state in which the first sheet and the second sheet are laminated on the liquid crystal panel in the first embodiment.

Fig. 5 is a view for explaining a manufacturing system of a liquid crystal display element of the second embodiment.

Fig. 6 is a view for explaining a manufacturing system of a liquid crystal display element of the third embodiment.

Fig. 7A is a schematic view showing a state in which a first sheet is laminated on a liquid crystal panel in the third embodiment.

Fig. 7B is a schematic view showing a state in which a second sheet is laminated on a liquid crystal panel (a liquid crystal panel is horizontally rotated by 90° and then laminated).

Fig. 7C is a schematic view showing a state in which the first sheet and the second sheet are laminated on the liquid crystal panel in the third embodiment.

Fig. 8 is a view for explaining the film width and the cutting interval of the optical film.

1. . . Continuous roll

2. . . Continuous roll

4. . . LCD panel

12. . . Lining film

13. . . 2-color polarizing film

20. . . Cutting mechanism

20a. . . Adsorption mechanism

twenty two. . . Lining film

twenty three. . . Reflective polarizing film

30. . . Adjustment roller

40. . . Stripping mechanism

50a. . . Attaching roller

50b. . . Drive roller

60. . . Winding mechanism

80. . . Transfer roller

101. . . Liner conveying mechanism

102. . . Liquid crystal panel transport mechanism

103. . . Attachment mechanism

131. . . 2 color polarizing film sheet

201. . . Liner conveying mechanism

202. . . Liquid crystal panel transport mechanism

203. . . Attachment mechanism

204. . . Liquid crystal panel transport mechanism

231. . . Sheet of reflective polarizing film

300. . . Control department

301. . . Two-color polarizing film sheet laminating device

302. . . Sheet laminate device for reflecting polarizing film

Claims (20)

A method for producing a liquid crystal display device comprising a sheet stacking step of two or more optical films, the step comprising: winding a continuous roll from a film having an optical film having a specific film width containing an adhesive layer a step of transporting the liner film of the liner film; leaving the liner film to cut the optical film at a specific cutting interval in a film width direction orthogonal to the longitudinal direction of the optical film to form a sheet of the optical film a cutting sub-step; a transport sub-step of transporting the liquid crystal panel; and a step of attaching the sheet which has been peeled from the backing film to the liquid crystal panel side by interposing the sheet from the backing film while the liquid crystal panel is being conveyed And two or more sheets are laminated on the liquid crystal panel side in order to form two or more sheets, and a liquid crystal display element is formed on the surface of one of the liquid crystal panels. In the above-mentioned sheet, the two or more windings are set so that the four sides of the sheet to be laminated next are smaller than the sides corresponding to the four sides of the sheet which has been laminated in the stacking state. Optics for continuous rolls The film width of the film and the aforementioned cutting interval of the cutting step are set. The method of manufacturing a liquid crystal display element according to claim 1, wherein the side of the film corresponding to the film width of the optical film wound around the continuous roll is a first side, and is orthogonal to the first side. When the side corresponding to the length of the cutting interval is the second side, the first side of one sheet before the previous layer is placed corresponding to the first side of the sheet to be laminated next to the sheet. The second side of the preceding sheet corresponds to the second side of the next sheet, and is laminated on the front sheet. The next sheet is laminated on two or more sheets of one surface of the liquid crystal panel so that the film width of the first layered sheet is maximized, and then the film width of the laminated sheet is sequentially reduced. Setting a film width of the two or more optical films wound on the continuous roll; and maximizing the cutting interval of the first laminated sheets formed in the cutting step, and thereafter cutting the laminated sheets The optical film is cut in the cutting step described above to form a sheet in such a manner that the interval is sequentially reduced. A method of manufacturing a liquid crystal display element according to claim 1, further comprising a horizontal rotation step of laminating a liquid crystal panel having a sheet by the attaching sub-step, and laminating the lower sheet by the next attaching sub-step Previously, the conveyance direction of the liquid crystal panel was horizontally rotated by 90°; and in the sheet, the side corresponding to the film width of the optical film wound around the continuous roll was set as the first side, and the first side was When the side orthogonal to the length of the cutting interval is the second side, the first side of one sheet before the layer is stacked before the horizontal rotation step corresponds to the second side of the next sheet. And the second side of the preceding sheet corresponds to the first side of the next sheet, and the next sheet is laminated on the front sheet; so that the a film having a side smaller than the second side of the front sheet, and a film width of the optical film wound around the continuous roll for forming the next sheet; and the aforementioned first sheet 2 sides smaller than the previous piece In the first aspect of the material, the cutting interval is set, and the optical film is cut in the cutting substep to form the next sheet based on the cutting interval. A method of manufacturing a liquid crystal display element according to claim 1, wherein the two or more sheet stacking steps are continuously performed. The method of manufacturing a liquid crystal display device according to claim 2, wherein one of the optical films is a two-color polarizing film, and the other optical film is a reflective polarizing film; and the step of laminating the two color polarizing films is laminated on the liquid crystal panel. a sheet of the two-color polarizing film; and a step of laminating the sheet of the reflective polarizing film such that a transmission axis of the sheet of the two-color polarizing film and a transmission axis of the sheet of the reflective polarizing film are in the same direction The sheet of the reflective polarizing film is attached to the sheet of the two-color polarizing film, and the sheet of the reflective polarizing film is laminated on the liquid crystal panel. The method for producing a liquid crystal display device according to claim 5, wherein the reflective polarizing film and the two-color polarizing film to which the reflective polarizing film is attached have a transmission axis in a longitudinal direction orthogonal to the film width direction. The method of manufacturing a liquid crystal display device of claim 5, further comprising an inspection step of laminating the two color-changing films of the two liquid crystal panels after the two-layer two-color polarizing film of the liquid crystal panel The liquid crystal panel is optically inspected; and the sheet stacking step of the reflective polarizing film is performed on the sheet of the two color polarizing film laminated on one surface of the liquid crystal panel after being inspected by the inspection step. The direction and the opposite of the transmission axis of the sheet of the 2-color polarizing film The sheet of the reflective polarizing film is attached in such a manner that the direction of the transmission axis of the sheet of the polarizing film is the same. A manufacturing system of a liquid crystal display device comprising a sheet stacking device of two or more optical films, the device comprising: a continuous roll obtained by winding a liner film of an optical film having a specific film width containing an adhesive layer a lining film transport mechanism that transports the lining film; and the lining film is left, and the optical film is cut at a specific cutting interval in a film width direction orthogonal to the longitudinal direction of the optical film to form a sheet of the optical film. a cutting mechanism; a conveying mechanism for conveying the liquid crystal panel; and a bonding mechanism that laminates the sheet that has been peeled off from the liner film to the liquid crystal panel side while interposing the sheet from the liner film; In the two or more sheet stacking apparatuses, two or more sheets are sequentially laminated on the liquid crystal panel side for each sheet to form a liquid crystal display element, and two or more sheets laminated on one surface of the liquid crystal panel are laminated. In the material, the two sides of the sheet to be laminated are smaller than the sides corresponding to the four sides of the sheet which has been laminated in the stacking state, and the two or more sheets are wound around the continuous roll. Film width of optical film And the aforementioned cutting interval of the cutting mechanism. The manufacturing system of the liquid crystal display element of claim 8, wherein the side of the film corresponding to the film width of the optical film wound around the continuous roll is the first side, and is orthogonal to the first side. When the side corresponding to the length of the cutting interval is the second side, the first side of one sheet before the previous layer is placed corresponding to the first side of the sheet to be laminated next to the sheet. The first side of the previous piece of paper corresponds to the next side a method of stacking the next sheet on the front sheet by stacking the second sheet on the front sheet; and laminating the sheet in one or more sheets on one side of the liquid crystal panel so that the sheet is initially laminated The film width is the largest, and the film width of the sheet of the laminated film is sequentially reduced, and the film width of the two or more optical films wound around the continuous roll is set; and the cutting mechanism of the sheet laminating device is such that In the first layered sheet, the cutting interval is the largest, and the sheet forming the sheet is cut by sequentially cutting the sheet to be cut. The manufacturing system of the liquid crystal display element of claim 8, further comprising a horizontal rotating portion for laminating the liquid crystal panel with the sheet by the attaching mechanism before laminating the next sheet by the next attaching mechanism And horizontally rotating by 90° with respect to the conveyance direction of the liquid crystal panel; and in the sheet, a side corresponding to a film width of the optical film wound around the continuous roll is referred to as a first side, and the first side is positive When the side corresponding to the length of the cutting interval is the second side, the first side of the sheet before the layer is rotated by the horizontal rotating portion corresponds to the second side of the next sheet. And the second sheet of the preceding sheet corresponds to the first side of the next sheet, and the next sheet is laminated on the front sheet; and the next sheet is The first side is smaller than the second side of the front sheet, and the film width of the optical film wound around the continuous roll for forming the next sheet is set; and the next sheet is The second side is smaller than the previous piece In the first aspect of the material, the cutting interval is set, and the cutting mechanism cuts the optical film based on the cutting interval to form the next sheet. The manufacturing system of the liquid crystal display element of claim 8, wherein the two or more sheet laminating apparatuses are disposed in a continuous production line. The manufacturing system of the liquid crystal display element of claim 9, wherein one of the optical films is a two-color polarizing film, and the other optical film is a reflective polarizing film; and the sheet-layering device of the two-color polarizing film is laminated on the liquid crystal panel. a sheet of the two-color polarizing film; and a sheet stacking apparatus for reflecting the polarizing film, wherein the transmission axis of the sheet of the two-color polarizing film and the transmission axis of the sheet of the reflective polarizing film are in the same direction The sheet of the reflective polarizing film is attached to the sheet of the two-color polarizing film, and the sheet of the reflective polarizing film is laminated on the liquid crystal panel. The manufacturing system of the liquid crystal display element of claim 12, wherein the reflective polarizing film and the two-color polarizing film to which the reflective polarizing film is attached have a transmission axis in a longitudinal direction orthogonal to the film width direction. The manufacturing system of the liquid crystal display element of claim 12, further comprising an inspection device which is a sheet stacking device of two of the two color polarizing films, after the two-area layer 2 color polarizing film of the liquid crystal panel The liquid crystal panel is optically inspected, and the sheet laminate device of the reflective polarizing film is placed on a sheet of a two-color polarizing film laminated on one surface of the liquid crystal panel after being inspected by the inspection device. The direction of the transmission axis of the sheet of the color polarizing film The sheet of the reflective polarizing film is attached in such a manner that the direction of the transmission axis of the sheet of the reflective polarizing film is the same. A method for producing a liquid crystal display device comprising a sheet stacking step of two or more optical films, the step comprising: lining a sheet of an optical film having a specific film width containing a plurality of adhesives from adjacent layers a continuous roll wound by a film, a step of transporting the liner film transfer step; a transfer sub-step of transporting the liquid crystal panel; and the sheet which has been peeled off from the liner film while interposing the liquid crystal panel An adhesive is laminated on the liquid crystal panel side, and the two or more sheets are sequentially laminated on the liquid crystal panel side to form a liquid crystal by the two or more sheet stacking steps. a display element laminated on two or more sheets of one surface of the liquid crystal panel such that four sides of the sheet to be laminated next are smaller than the four sides of the sheet which has been laminated before in the laminated state In the manner of the corresponding side, the film width of the sheet of the optical film wound on the continuous roll of two or more sheets and the length in the direction orthogonal to the film width are set. The method of manufacturing a liquid crystal display element according to claim 15, wherein the film has a side corresponding to a film width of a sheet wound around the optical film of the continuous roll, and is equivalent to the film. When the side of the length of the width orthogonal direction is the second side, the first side of the sheet before the previous layer is formed corresponding to the first side of the sheet to be laminated next to the front side, and the front side The second side of the sheet of paper corresponds to the second side of the next sheet, and the next sheet is laminated on the preceding sheet; In a sheet of two or more sheets laminated on one surface of the liquid crystal panel, the film width of the first laminated sheet and the length in the direction orthogonal to the film width are maximized, and the film width of the laminated sheet is followed by The film width of the sheet of the optical film wound on the continuous roll of two or more sheets and the length in the direction orthogonal to the film width are set so that the length in the direction in which the film width is orthogonally decreases. A method of manufacturing a liquid crystal display element according to claim 15, further comprising a horizontal rotation step of laminating a liquid crystal panel having a sheet by the attaching sub-step, and laminating the next sheet by the next attaching sub-step Previously, the transport direction of the liquid crystal panel was horizontally rotated by 90°; and in the sheet, the side corresponding to the film width of the optical film wound around the continuous roll was set as the first side, and the film was equivalent to the film. When the side of the length in the direction orthogonal to the width is the second side, the first side of the one sheet before the layer is stacked before the horizontal rotation step corresponds to the second side of the next sheet, and the front side The second side of the one sheet corresponds to the first side of the next sheet, and the next sheet is formed on the front sheet of the sheet; and the first side of the next sheet is formed The film width of the sheet wound around the optical film of the continuous roll is set to be smaller than the second side of the front sheet; and the second side of the next sheet is smaller than the front sheet The first side of the way, setting and volume The length of the film of the optical film of the continuous roll is orthogonal to the direction in which the film width is orthogonal. A manufacturing system for a liquid crystal display element comprising two or more optical films A sheet laminating apparatus comprising: a continuous roll obtained by winding a film of a sheet of an optical film having a specific film width of a plurality of sheets of an adjacent layer, and transporting the lining of the lining film a film transporting mechanism; a transporting mechanism that transports the liquid crystal panel; and an attaching mechanism that laminates the sheet that has been peeled off from the lining film to the liquid crystal panel while interposing the sheet from the lining film; In the two or more sheet stacking apparatuses, two or more sheets are sequentially laminated on the liquid crystal panel side for each sheet to form a liquid crystal display element, and two or more sheets laminated on one surface of the liquid crystal panel are laminated. In the material, the two sides of the sheet to be laminated are smaller than the sides corresponding to the four sides of the sheet which has been laminated in the stacking state, and the two or more sheets are wound around the continuous roll. The film width of the sheet of the optical film and the length in the direction orthogonal to the film width. The manufacturing system of the liquid crystal display element of claim 18, wherein a side corresponding to a film width of a sheet wound around the optical film of the continuous roll is referred to as a first side, and corresponds to the film When the side of the length of the width orthogonal direction is the second side, the first side of the sheet before the previous layer is formed corresponding to the first side of the sheet to be laminated next to the front side, and the front side The second side of the one sheet corresponds to the second side of the next sheet, and the next sheet is laminated on the front sheet; and two or more sheets laminated on one side of the liquid crystal panel are laminated In the material, the film width of the first laminated sheet and the length in the direction orthogonal to the film width are maximized, and the film width of the subsequently laminated sheet and the direction orthogonal to the film width are The film length of the sheet of the optical film wound on the continuous roll of two or more sheets and the length in the direction orthogonal to the film width are set so that the length is sequentially reduced. The manufacturing system of the liquid crystal display element of claim 18, further comprising a horizontal rotating portion for laminating the liquid crystal panel with the sheet by the attaching mechanism before laminating the next sheet by the next attaching mechanism And horizontally rotating by 90° with respect to the conveyance direction of the liquid crystal panel; and in the sheet, the side corresponding to the film width of the optical film wound around the continuous roll is referred to as a first side, and corresponds to the film width When the side of the length of the orthogonal direction is the second side, the first side of the one sheet before the layer is laminated before the horizontal rotating unit is rotated corresponds to the second side of the next sheet. Forming the next piece of the sheet on the front piece of the sheet in a manner in which the second side of the preceding sheet corresponds to the first side of the next sheet; and The film width of the sheet wound around the optical film of the continuous roll is set such that the one side is smaller than the second side of the front sheet; and the second side of the next sheet is smaller than the front sheet The way of the first side of the sheet, setting and volume The length of the film of the optical film of the continuous roll is orthogonal to the direction in which the film width is orthogonal.