JP5792597B2 - Liquid crystal display element manufacturing method and liquid crystal display element manufacturing system - Google Patents

Description

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

  Patent Document 1 describes a method of manufacturing a liquid crystal display element by laminating a plurality of optical films on a liquid crystal panel in order for each optical film. Specifically, the carrier film is fed out from a continuous roll formed by winding a carrier film on which an optical film is laminated, and the optical film is cut into a predetermined size (half cut) in the film width direction while leaving the carrier film. The sheet piece from which the carrier film is peeled off is attached to the liquid crystal panel, and the sheet pieces of the next optical film are sequentially laminated on the optical film laminated on the liquid crystal panel.

JP 2009-271516 A

  In the case of the above-mentioned Patent Document 1, since a plurality of optical film sheet pieces are sequentially laminated, high-precision bonding is required. However, in Patent Document 1, it is necessary to continuously transport an optical film and a carrier film in the form of a continuous web fed from a continuous roll to a position where the optical film is attached to a liquid crystal panel. It is easy to make sheet stacking exactly at the surface position due to the influence of various mechanical errors and control errors such as mechanism, liquid crystal panel feed processing mechanism, sheet piece sticking processing mechanism, carrier film feed processing mechanism, etc. is not. In order to reduce the amount of misalignment between the sheet pieces, it is possible to cope with this by reducing the manufacturing speed, but the productivity decreases as the manufacturing speed decreases.

  If the lamination of the sheet pieces is shifted, the pressure-sensitive adhesive formed on the optical film is exposed, and there is a concern that foreign matter adheres to the exposed pressure-sensitive adhesive and deteriorates display quality. There is also a concern that the exposed and sticking adhesive comes into contact with the outside during transportation to become a paste ball, and that the paste ball becomes a foreign object at the time of bonding. Further, if the displacement is large, there is a concern that the liquid crystal panel is stacked without covering the display area.

  And each sheet piece needs to be laminated | stacked so that the display area (liquid crystal cell) of a liquid crystal panel may be covered at least, and also it is not desirable to laminate | stack so that it may protrude from the edge of a liquid crystal panel. When the sheet pieces protrude from the end of the liquid crystal panel and are stacked, it is necessary to cut and remove the protruding portion.

  The present invention has been made in view of the above circumstances, and the amount of sticking misalignment is taken into consideration without lowering the production speed, so that the adhesive does not protrude (expose) between the laminated sheet pieces. A liquid crystal display element manufacturing method and a liquid crystal display element manufacturing system are provided.

  As a result of intensive studies in order to solve the above problems, the present invention has been completed.

The present invention includes a carrier film transport sub-step for transporting the carrier film from a continuous roll formed by winding a carrier film on which an optical film having a predetermined film width including an adhesive is laminated, and optically leaving the carrier film. A cutting sub-step for cutting the optical film at a predetermined cutting interval in the film width direction perpendicular to the longitudinal direction of the film to form a sheet piece of the optical film, a transport sub-step for transporting the liquid crystal panel, and the liquid crystal panel Including two or more sheet film stacking steps of an optical film including a pasting sub-step of stacking the sheet strip peeled from the carrier film on the liquid crystal panel side through the adhesive while transporting, By the sheet piece stacking step, two or more sheet pieces are liquid crystal in order for each sheet piece Forming a liquid crystal display element by laminating the panel side, the manufacturing method for the liquid crystal display element,
In two or more sheet pieces laminated on one side of the liquid crystal panel, each of the four sides of the sheet piece to be laminated next corresponds in the laminated state among the four sides of the sheet piece laminated immediately before The film width of the optical film wound around the two or more continuous rolls is set so as to be smaller than the side to be cut, and the cutting interval in the cutting sub-step is set.

  In this configuration, in consideration of sticking misalignment, each of the four sides of the sheet piece to be laminated next (rear) corresponds to the four pieces of the sheet pieces laminated immediately before in the laminated state. By making it smaller than the side, the sticking out (exposure) of the adhesive between the sequentially laminated sheet pieces does not occur.

In the above invention, in the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, and is orthogonal to the first side and corresponds to the length of the cutting interval. When the side is the second side,
The first side of the next sheet piece to be laminated next corresponds to the first side of the immediately preceding sheet piece that has been laminated first, and the next side to the second side of the immediately preceding sheet piece. A first lamination process (first sheet piece lamination step) in which the next sheet piece is laminated on the immediately preceding sheet piece so that the second side of the sheet piece corresponds to
The second side of the next sheet piece to be laminated next corresponds to the first side of the immediately preceding sheet piece, and the next side of the immediately preceding sheet piece. Even if both the second lamination process (second sheet piece lamination step) in which the next sheet piece is laminated on the immediately preceding sheet piece so that the first side of the sheet piece corresponds to the first side Any one of the lamination processes may be executed. The order of the first stacking process and the second stacking process is not particularly limited. Further, after the first stacking process is executed once or once or more, the second stacking process may be executed once or once or more, and vice versa. Further, the second stacking process may be executed during the first stacking process performed a plurality of times, and vice versa.

As one embodiment of the invention, in the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, orthogonal to the first side, and the length of the cutting interval. When the side corresponding to the length is the second side, the first side of the next sheet piece to be laminated next corresponds to the first side of the sheet piece immediately before laminated, The next sheet piece is laminated on the immediately preceding sheet piece so that the second side of the next sheet piece corresponds to the second side of the sheet piece,
In two or more sheet pieces laminated on one side of the liquid crystal panel, the film width of the sheet piece laminated first is the largest, and the film width of the sheet piece laminated thereafter is sequentially reduced, The film width of the optical film wound around the two or more continuous rolls is set, and the cutting interval of the first laminated sheet pieces formed in the cutting substep is the largest, and is laminated after the next. In the cutting sub-step, the optical film is cut to form sheet pieces so that the cutting intervals of the sheet pieces to be sequentially reduced.

  In this configuration, the film width and the predetermined cutting interval (the length in the direction perpendicular to the film width direction) of the sheet piece first laminated on the liquid crystal panel are the largest, and those of the second and subsequent sheet pieces are By sequentially reducing the size, the second and subsequent sheet pieces do not stick out from the sheet pieces laminated before that, and the adhesive sticks out (exposes) between the laminated sheet pieces. It will not occur.

  It is preferable to measure in advance the amount of misalignment caused by the machine error of each sheet piece laminating apparatus and set the film width and cutting interval of the sheet pieces so as to be smaller than the amount of misalignment.

As one embodiment of the present invention, the liquid crystal panel on which the sheet pieces are laminated by the pasting substep is 90 ° horizontally with respect to the transport direction of the liquid crystal panel before the next sheet piece is laminated by the next pasting substep. And further including a horizontal rotation step of rotating,
In the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, a side orthogonal to the first side and a side corresponding to the length of the cutting interval is the first side. When there are two sides, the second side of the next sheet piece corresponds to the first side of the immediately preceding sheet piece stacked before the horizontal rotation step, and the second side of the immediately preceding sheet piece. The next sheet piece is laminated on the immediately preceding sheet piece so that the first side of the next sheet piece corresponds to the side,
An optical film wound around the continuous roll for forming the next sheet piece so that the first side of the next sheet piece is smaller than the second side of the immediately preceding sheet piece. Set film width, and
The cutting interval is set so that the second side of the next sheet piece is smaller than the first side of the immediately preceding sheet piece, and based on the cutting interval, the optical sub-step The film is cut to form the next sheet piece.

  In this configuration, as shown in FIGS. 6 and 7, after the immediately preceding sheet piece sticking process, the liquid crystal panel is rotated 90 ° horizontally with respect to the conveying direction D, and the next sheet piece is stuck. The film width (first side) of the next sheet piece is smaller than the cutting interval (second side) of the immediately preceding sheet piece, and the cutting interval (second side) of the next sheet piece is the immediately preceding sheet piece. Thus, the next sheet piece does not protrude, and the adhesive does not protrude (expose) between the laminated sheet pieces. In the present invention, “90 °” of “90 ° horizontal rotation” includes a range of variation.

  Moreover, it is preferable that the area of all the sheet pieces laminated | stacked on a liquid crystal panel is more than the display area (liquid crystal cell area | region) of a liquid crystal panel, and below the surface area of a liquid crystal panel. Furthermore, the film width and the cutting interval of the sheet piece on the outermost surface laminated on the liquid crystal panel are preferably set based on the display area (liquid crystal cell area) of the liquid crystal panel and the amount of misalignment. The amount of misalignment is the amount of misalignment in the X direction, which is the transport direction of the liquid crystal panel, the amount of misalignment in the Y direction (film width direction) in the direction orthogonal to the X direction, Examples include the θ shift amount that is the rotation shift of the feed direction axis.

  As one embodiment of the invention, the attaching sub-step of the sheet piece laminating step for laminating the second and subsequent sheet pieces is perpendicular to the width direction central axis line of the first sheet piece and the width direction. The sheet piece is aligned so that the intersecting line with the center axis line in the direction coincides with the intersecting line between the center axis line in the width direction of the second and subsequent sheet pieces and the center axis line in the direction orthogonal to the width direction. It is preferable to laminate (see FIGS. 4A to 4C). With this configuration, the sheet pieces can be stacked so that the intersecting lines of the sheet pieces match or substantially match with each other, so that the sheet piece to be stacked next does not protrude from the sheet piece stacked immediately before.

  In order to stack the sheet pieces so that the crossing lines of the sheets match, the alignment of the liquid crystal panel or the edge or corner of the liquid crystal panel is used as a reference to position and paste the stacked sheet pieces. Is preferred. The distance from the alignment mark or the like to the end line of the sheet pieces increases in proportion to the order of the laminated sheet pieces. That is, all the sheet pieces to be laminated can be bonded by a panel-based alignment method based on the panel alignment mark or the like. Further, as another alignment method, an alignment method based on a sheet piece can be adopted. In this alignment method based on the sheet piece, the first sheet piece to be laminated is aligned and bonded based on the alignment mark or the like, and the second and subsequent sheet pieces are one sheet ahead of it. This is a method of aligning and bonding the edges or corners of the sheet pieces bonded together. This alignment method based on the sheet piece is preferable because it can be bonded into the sheet piece bonded earlier more reliably than that based on the panel.

  As one embodiment of the above invention, it is preferable that the two or more sheet piece lamination steps are continuously performed. Thereby, since the liquid crystal display element formed by laminating | stacking the sheet | seat piece of an optical film sequentially on a liquid crystal panel can be manufactured continuously, productivity can be improved. As another embodiment, two sheet piece lamination steps may be performed continuously, and then one or more sheet piece lamination steps may be performed continuously.

As one embodiment of the invention, one of the optical films is a two-color polarizing film, and one of the other optical films is a reflective polarizing film,
In the sheet piece laminating step of the two-color polarizing film, the sheet piece of the two-color polarizing film is laminated on the liquid crystal panel,
In the step of laminating the sheet pieces of the reflective polarizing film, the sheet pieces of the reflective polarizing film are placed so that the transmission axis of the sheet pieces of the two-color polarizing film and the transmission axis of the sheet piece of the reflective polarizing film are in the same direction. The sheet piece of the reflective polarizing film is laminated on the liquid crystal panel by being attached to the sheet piece of the two-color polarizing film. 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 the longitudinal direction perpendicular to the film width direction.

  Accordingly, 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 transmission axis of the two-color polarizing film is in the longitudinal direction (MD direction) and the transmission axis of the reflective polarizing film is in the longitudinal direction (MD direction), the transport direction of the two-color polarizing film, the reflective polarizing film, and the liquid crystal panel Therefore, the production line can be a straight line without employing a complicated mechanism such as a rotating mechanism.

Further, as one embodiment of the invention, after the two color polarizing film sheet pieces are laminated on both surfaces of the liquid crystal panel by the two two color polarizing film sheet piece laminating steps, the liquid crystal panel is optically inspected. Further comprising an inspection step to
The reflective polarizing film sheet piece laminating step includes: after the inspection in the inspecting step, on the sheet piece of the two-color polarizing film laminated on one surface of the liquid crystal panel; and the direction of the transmission axis of the sheet piece of the two-color polarizing film The sheet piece of the reflective polarizing film is attached so that the direction of the transmission axis of the sheet piece of the reflective polarizing film is the same. Thus, the reflective polarizing film is laminated on the liquid crystal panel via the two-color polarizing film.

  In this configuration, before laminating the reflective polarizing film, the liquid crystal panel in which the two-color polarizing film is laminated on both sides is inspected, and the reflective polarizing film is laminated on the liquid crystal panel judged to be non-defective, and the liquid crystal judged defective. Since it is not necessary to laminate it on the panel, the yield of the reflective polarizing film can be increased.

  In another aspect of the invention, a carrier film conveying means for conveying the carrier film from a continuous roll formed by winding a carrier film on which an optical film having a predetermined film width including an adhesive is laminated, and leaving the carrier film. Cutting means for cutting the optical film at a predetermined cutting interval in the film width direction orthogonal to the longitudinal direction of the optical film to form a sheet piece of the optical film, transport means for transporting the liquid crystal panel, and the liquid crystal panel Two or more sheet piece laminating devices for an optical film provided with an attaching means for laminating the sheet pieces peeled from the carrier film on the liquid crystal panel side through the adhesive while being conveyed, the two or more sheets A liquid crystal display element in which two or more sheet pieces are sequentially laminated on the liquid crystal panel side for each piece of sheet by a single lamination device In the liquid crystal display element manufacturing system to be formed, in two or more sheet pieces laminated on one surface of the liquid crystal panel, each of the four sides of the next laminated sheet piece is laminated immediately before The film width of the optical film wound around the two or more continuous rolls is set so as to be smaller than the corresponding side in the laminated state among the four sides of the sheet piece, and the cutting interval in the cutting means Is set.

  In this configuration, in consideration of sticking misalignment, each of the four sides of the sheet piece to be laminated next (rear) corresponds to the four pieces of the sheet pieces laminated immediately before in the laminated state. By making it smaller than the side, the sticking out (exposure) of the adhesive between the sequentially laminated sheet pieces does not occur.

As one embodiment of the invention, in the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, orthogonal to the first side, and the length of the cutting interval. When the side corresponding to the length is the second side, the first side of the next sheet piece to be laminated next corresponds to the first side of the sheet piece immediately before laminated, The next sheet piece is laminated on the immediately preceding sheet piece so that the second side of the next sheet piece corresponds to the second side of the sheet piece,
In the two or more sheet pieces laminated on one side of the liquid crystal panel, the film width of the sheet piece laminated first is the largest, and the film width of the sheet piece laminated next and thereafter is sequentially reduced. The film width of the optical film wound around two or more continuous rolls is set, and the cutting interval of the first laminated sheet piece is the largest, and the cutting interval of the next laminated sheet piece is sequentially The cutting means of the sheet piece laminating apparatus cuts the optical film to form a sheet piece so as to be smaller.

  In this configuration, the film width and the cutting interval (the length in the direction orthogonal to the width direction) of the sheet pieces that are first laminated on the liquid crystal panel are the largest, and those of the second and subsequent sheet pieces are sequentially reduced. Therefore, the second and subsequent sheet pieces do not stick out from the sheet pieces laminated before that, and the adhesive does not protrude (expose) between the laminated sheet pieces. It becomes.

  Moreover, you may have the control part which controls the cutting | disconnection means and carrier film conveyance means of two or more said sheet piece lamination apparatuses as one Embodiment of the said invention. The control unit controls all the cutting means and the carrier film conveying means so that the cutting interval of the sheet pieces to be stacked first is the largest, and the cutting interval of the sheet pieces to be stacked after that is sequentially reduced. .

  It is preferable to measure in advance the amount of misalignment caused by the machine error of each sheet piece laminating apparatus and set the film width and cutting interval of the sheet pieces so as to be smaller than the amount of misalignment. These cutting intervals are stored in advance in the memory of the control unit, and the control unit controls the feeding amount of the carrier film and the cutting means so as to cut at this cutting interval. The feed amount may be measured, for example, by detection of an encoder that measures the rotation amount of a feed roller or the like that constitutes a part of the carrier film transport unit.

Further, as one embodiment of the invention, the liquid crystal panel in which the sheet pieces are laminated by the sticking means is placed 90 ° horizontally with respect to the transport direction of the liquid crystal panel before the next sheet piece is laminated by the next sticking means. It further has a horizontal rotating part to rotate,
In the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, a side orthogonal to the first side and a side corresponding to the length of the cutting interval is the first side. When there are two sides, the second side of the next sheet piece corresponds to the first side of the immediately preceding sheet piece stacked before the rotation by the horizontal rotating unit, The next sheet piece is laminated on the immediately preceding sheet piece so that the first side of the next sheet piece corresponds to the second side,
An optical film wound around the continuous roll for forming the next sheet piece so that the first side of the next sheet piece is smaller than the second side of the immediately preceding sheet piece. Set film width, and
The cutting interval is set so that the second side of the next sheet piece is smaller than the first side of the immediately preceding sheet piece, and based on the cutting interval, the cutting means is the optical film. Is cut to form the next sheet piece.

  In this configuration, as shown in FIGS. 6 and 7, after the immediately preceding sheet piece sticking process, the liquid crystal panel is rotated 90 ° horizontally with respect to the conveying direction D, and the next sheet piece is stuck. The film width (first side) of the next sheet piece is smaller than the cutting interval (second side) of the immediately preceding sheet piece, and the cutting interval (second side) of the next sheet piece is the immediately preceding sheet piece. Thus, the next sheet piece does not protrude, and the adhesive does not protrude (expose) between the laminated sheet pieces.

  As one embodiment of the invention, the sticking means of the sheet piece laminating apparatus for laminating the second and subsequent sheet pieces is perpendicular to the film width direction central axis line of the first sheet piece and the film width direction. The crossing line with the central axis line in the direction to be aligned and the crossing line between the central axis line in the film width direction of the second and subsequent sheet pieces and the central axis line in the direction orthogonal to the film width direction are the same. It is preferable to laminate sheet pieces. With this configuration, the sheet pieces can be stacked so that the intersecting lines of the sheet pieces match or substantially match with each other, so that the sheet piece to be stacked next does not protrude from the sheet piece stacked immediately before.

  The sticking means can stick the sheet piece by applying both the panel-based alignment method and the sheet-piece-based alignment method.

  Moreover, as one embodiment of the invention, the two or more sheet piece laminating apparatuses are arranged in a continuous production line. Thereby, since the liquid crystal display element formed by laminating | stacking the sheet | seat piece of an optical film sequentially on a liquid crystal panel can be manufactured continuously, productivity can be improved. As another embodiment, two sheet piece laminating apparatuses may be arranged on a continuous production line, and one or more sheet piece laminating apparatuses different from this may be arranged on another (continuous) production line.

Moreover, as one embodiment of the invention, one of the optical films is a two-color polarizing film, and one of the other optical films is a reflective polarizing film,
A two-color polarizing film sheet piece laminating apparatus laminates the two-color polarizing film sheet pieces on the liquid crystal panel,
The reflection polarizing film sheet piece laminating apparatus is arranged so that the transmission axis of the two-color polarizing film sheet piece and the transmission axis of the reflection polarizing film sheet piece are in the same direction. The sheet piece of the reflective polarizing film is laminated on the liquid crystal panel by being attached to the sheet piece of the two-color polarizing film. 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 the longitudinal direction perpendicular to the film width direction.

  Accordingly, 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 transmission axes of the two-color polarizing film and the reflective polarizing film are in the longitudinal direction (MD direction), the transport direction of the two-color polarizing film, the reflective polarizing film, and the liquid crystal panel can be the same direction. The production line can be a straight line without adopting a simple mechanism.

Moreover, as one embodiment of the above invention, after the sheet pieces of the two-color polarizing film are laminated on both surfaces of the liquid crystal panel using the two sheet piece laminating apparatuses of the two-color polarizing film, the liquid crystal panel is optically inspected. Further having an inspection device
The reflection polarizing film sheet piece laminating apparatus is configured such that, after inspection by the inspection apparatus, the direction of the transmission axis of the sheet piece of the two-color polarizing film is applied to the sheet piece of the two-color polarizing film laminated on one surface of the liquid crystal panel. And the sheet piece of the said reflective polarizing film is affixed so that the direction of the transmission axis of the sheet piece of a reflective polarizing film may become the same. Thus, the reflective polarizing film is laminated on the liquid crystal panel via the two-color polarizing film.

  In this configuration, before laminating the reflective polarizing film, the liquid crystal panel in which the two-color polarizing film is laminated on both sides is inspected, and the reflective polarizing film is laminated on the liquid crystal panel judged to be non-defective, and the liquid crystal judged defective. Since it is not necessary to laminate it on the panel, the yield of the reflective polarizing film can be increased.

  In another aspect of the present invention, a carrier film that conveys the carrier film from a continuous roll formed by winding a plurality of laminated optically adjacent sheet pieces of optical film having a predetermined film width including an adhesive. A transport sub-step, a transport sub-step for transporting the liquid crystal panel, and a pasting sub-step for laminating the sheet pieces peeled from the carrier film on the liquid crystal panel side through the adhesive while transporting the liquid crystal panel Including two or more sheet piece laminating steps of the optical film, and by the two or more sheet piece laminating steps, two or more sheet pieces are sequentially laminated on the liquid crystal panel side for each sheet piece to form a liquid crystal display element. A method of manufacturing a liquid crystal display element, wherein two or more sheet pieces are laminated on one surface of the liquid crystal panel. Winding around the two or more continuous rolls so that each of the four sides of the sheet piece to be laminated next is smaller than the corresponding side in the laminated state among the four sides of the sheet piece laminated immediately before. The film width of the sheet piece of the optical film being rotated and the length in the direction orthogonal to the film width are set. As a result, a so-called continuous roll with cuts can be used, so that the cutting sub-step as described above can be omitted.

  As one embodiment of the invention, in the sheet piece, a side corresponding to the film width of the sheet piece of the optical film wound around the continuous roll is defined as a first side, and the length in a direction orthogonal to the film width When the side corresponding to the length is the second side, the first side of the next sheet piece to be laminated next corresponds to the first side of the sheet piece immediately before laminated, The next sheet piece is laminated on the immediately preceding sheet piece and laminated on one side of the liquid crystal panel so that the second side of the next sheet piece corresponds to the second side of the sheet piece In the two or more sheet pieces, the film width of the sheet piece to be laminated first and the length in the direction orthogonal to the film width are the largest, and the film width and the film width of the sheet piece to be laminated after Length in orthogonal direction As gradually decrease, the length in the direction perpendicular to the film width and the film width of the sheet pieces of the optical film is wound into the two or more continuous roll is set.

As one embodiment of the present invention, the liquid crystal panel on which the sheet pieces are laminated by the pasting substep is 90 ° horizontally with respect to the transport direction of the liquid crystal panel before the next sheet piece is laminated by the next pasting substep. And further including a horizontal rotation step of rotating,
In the sheet piece, the side corresponding to the film width of the optical film wound around the continuous roll is defined as the first side, and the side corresponding to the length in the direction orthogonal to the film width is defined as the second side. Then, the second side of the next sheet piece corresponds to the first side of the immediately preceding sheet piece laminated before the horizontal rotation step, and the second side of the immediately preceding sheet piece, The next sheet piece is stacked on the immediately preceding sheet piece so that the first side of the next sheet piece corresponds, and the first side of the next sheet piece is the same as that of the immediately preceding sheet piece. The film width of the sheet piece of the optical film wound around the continuous roll is set so as to be smaller than the second side, and the second side of the next sheet piece is the immediately preceding sheet piece. So that it is smaller than the first side. Length in the direction perpendicular to the film width of the sheet pieces of the optical film is wound into a roll is set.

  In another aspect of the present invention, a carrier film that conveys the carrier film from a continuous roll formed by winding a plurality of laminated optically adjacent sheet pieces of optical film having a predetermined film width including an adhesive. A transport unit; a transport unit that transports the liquid crystal panel; and a pasting unit that stacks the sheet piece peeled from the carrier film on the liquid crystal panel side through the adhesive while transporting the liquid crystal panel. A liquid crystal display device comprising two or more sheet piece laminating devices for an optical film, wherein the two or more sheet piece laminating devices form a liquid crystal display element by sequentially laminating two or more sheet pieces on the liquid crystal panel side for each sheet piece; A display element manufacturing system, wherein two or more sheet pieces stacked on one surface of the liquid crystal panel are stacked next. The sheet piece of the optical film wound around the two or more continuous rolls so that each of the four sides becomes smaller than the corresponding side in the laminated state among the four sides of the sheet piece laminated immediately before. The film width and the length in the direction orthogonal to the film width are set. As a result, a so-called continuous roll with cuts can be used, so that the cutting sub-step as described above can be omitted.

  As one embodiment of the invention, in the sheet piece, a side corresponding to the film width of the sheet piece of the optical film wound around the continuous roll is defined as a first side, and the length in a direction orthogonal to the film width When the side corresponding to the length is the second side, the first side of the next sheet piece to be laminated next corresponds to the first side of the sheet piece immediately before laminated, The next sheet piece is laminated on the immediately preceding sheet piece and laminated on one side of the liquid crystal panel so that the second side of the next sheet piece corresponds to the second side of the sheet piece In the two or more sheet pieces, the film width of the sheet piece to be laminated first and the length in the direction orthogonal to the film width are the largest, and the film width and the film width of the sheet piece to be laminated after Length in orthogonal direction As gradually decrease, the length in the direction perpendicular to the film width and the film width of the sheet pieces of the optical film is wound into the two or more continuous roll is set.

  As one embodiment of the invention, the liquid crystal panel in which the sheet pieces are laminated by the sticking means is rotated 90 ° horizontally with respect to the transport direction of the liquid crystal panel before the next sheet piece is laminated by the next sticking means. A side corresponding to a length in a direction orthogonal to the film width, wherein the side corresponding to the film width of the optical film wound around the continuous roll is a first side, further including a horizontal rotating part Is the second side, the second side of the next sheet piece corresponds to the first side of the immediately preceding sheet piece laminated before the rotation by the horizontal rotating unit, and the immediately preceding sheet The next sheet piece is laminated on the immediately preceding sheet piece so that the first side of the next sheet piece corresponds to the second side of the piece, and the first side of the next sheet piece Is the sheet piece just before The film width of the sheet piece of the optical film wound around the continuous roll is set so as to be smaller than the second side, and the second side of the next sheet piece is the immediately preceding sheet. The length in the direction orthogonal to the film width of the sheet piece of the optical film wound around the continuous roll is set so as to be smaller than the first side of the piece.

Moreover, as one embodiment of any one of the above manufacturing methods, the sheet piece lamination step further includes a film inspection sub-step for inspecting an optical film,
The cutting sub-step preferably cuts the optical film according to the inspection result of the film inspection sub-step. Inspection means to inspect for defects in the optical film. Moreover, when an optical film is cut | disconnected according to a test result, it can comprise so that a fault part may be avoided and cut | disconnected. It is preferable to remove the defective portion as a defective product into a predetermined size and eliminate it with a removal device or the like so as not to be bonded to the liquid crystal panel.

  Moreover, in said embodiment, in the said film test | inspection substep, the said optical film is test | inspected in the state which peeled the said carrier film from the said optical film, and after a test | inspection, a carrier film is put into the said optical film via the said adhesive It is preferable to stick together. Thereby, it is not necessary to consider the phase difference inherent in the carrier film and the defects such as foreign matter and scratches attached to or inherent in the carrier film, and the defect inspection of the optical film can be performed.

  Further, in the above-described embodiment, the cutting sub-step excludes the optical film determined to be defective as a result of the inspection of the film inspection sub-step to be cut into a predetermined size and the sheet piece of the optical film determined to be defective is excluded. It is preferable to further include substeps. When a defective product is determined in the defect inspection, a sheet piece that is cut into a predetermined size (sometimes referred to as a skip cut) so as to avoid a defective portion of the optical film and includes a defect determined as a defective product is, for example, known It is excluded (removed) by the exclusion device. Thereby, the yield of an optical film improves significantly.

3 is a flowchart of a method for manufacturing the liquid crystal display element of Embodiment 1. 5 is a flowchart of a method for manufacturing a liquid crystal display element of Embodiment 2. 3 is a diagram for explaining a manufacturing system of a liquid crystal display element of Embodiment 1. FIG. FIG. 3 is a schematic diagram illustrating a state in which the first sheet piece is stacked on the liquid crystal panel in the first embodiment. FIG. 2 is a schematic diagram illustrating a state in which a second sheet piece is stacked on a liquid crystal panel in the first embodiment. FIG. 3 is a schematic diagram illustrating a state in which the first and second sheet pieces are stacked on the liquid crystal panel in the first embodiment. 6 is a diagram for explaining a manufacturing system of a liquid crystal display element of Embodiment 2. FIG. FIG. 10 is a diagram for explaining a liquid crystal display element manufacturing system according to a third embodiment. FIG. 10 is a schematic diagram of a state in which a first sheet piece is stacked on a liquid crystal panel in Embodiment 3. FIG. 10 is a schematic diagram of a state in which a second sheet piece is stacked on a liquid crystal panel in Embodiment 3. FIG. 10 is a schematic diagram of a state in which the first and second sheet pieces are stacked on the liquid crystal panel in the third embodiment. It is a figure for demonstrating the film width and cutting | disconnection space | interval of an optical film.

  The optical film only needs to include an adhesive layer as the outermost layer, and may be a single-layer optical film or a laminated optical film in which optical films are laminated. Moreover, the structure by which the other film member was laminated | stacked on the optical film may be sufficient. Examples of the optical film include a polarizer and a polarizing film. The polarizing film is formed by laminating a polarizer and a polarizer protective film on both sides or one side thereof. In some cases, a surface protective film for protecting the polarizer or the polarizing film from scratches during transportation is laminated. Examples of other optical films include optical compensation films such as retardation films and brightness enhancement films. As the laminated optical film, a retardation film and / or a brightness enhancement film may be laminated on a polarizer or a polarizing film.

  Examples of the polarizing film include a two-color polarizing film. The two-color polarizing film is (A) a step of drying a polyvinyl alcohol-based film that has been dyed, crosslinked and stretched to obtain a polarizer, and (B) a step of attaching a protective layer to one or both sides of the polarizer, (C) It manufactures by the manufacturing method including the process of heat-processing after bonding. Each treatment of dyeing, crosslinking and stretching of the polyvinyl alcohol film need not be performed separately and may be performed simultaneously, and the order of the treatments may be arbitrary. In addition, you may use the polyvinyl alcohol-type film which gave the swelling process as a polyvinyl-alcohol-type film. Generally, a polyvinyl alcohol film is immersed in a solution containing iodine or a dichroic dye, dyed by adsorbing iodine or a dichroic dye, washed, and stretched in a solution containing boric acid or borax. After uniaxial stretching at a magnification of 3 to 7 times, it is dried. After stretching in a solution containing iodine or dichroic dye, further stretching (two-stage stretching) in a solution containing boric acid or borax, etc., and then drying, the orientation of iodine increases, and the degree of polarization This is particularly preferable because the characteristics are improved.

  Examples of the brightness enhancement film include a reflective polarizing film having a reflection axis and a transmission axis. The reflective polarizing film can be obtained, for example, by alternately laminating and stretching a plurality of polymer films A and B of two different materials. The refractive index of only material A increases and changes in the stretching direction, birefringence is developed, and the stretching direction having a difference in refractive index at the interface of material AB becomes the reflection axis, and the direction in which no refractive index difference occurs (non-stretching direction). It becomes the transmission axis.

  The pressure-sensitive adhesive contained in the optical film is not particularly limited, and examples thereof include an acrylic pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, and a urethane pressure-sensitive adhesive. As the carrier film, for example, a film such as a plastic film (for example, a polyethylene terephthalate film, a polyolefin film, etc.) can be used. Further, if necessary, an appropriate material such as a silicone-based, long-chain alkyl-based, fluorine-based or molybdenum sulfide-coated material may be used.

(Optical film and continuous roll)
In the present embodiment, the form in which the optical film is formed on the carrier film is not particularly limited. For example, you may be comprised with the continuous roll wound by roll shape. As a continuous roll, what wound the optical film laminated body which has (1) carrier film and the optical film containing the adhesive formed on the said carrier film in roll shape is mentioned, for example. In this case, in order to form a sheet piece of the optical film from the optical film, the liquid crystal display element manufacturing system leaves the carrier film without being cut and keeps the optical film (including the adhesive) at a predetermined cutting interval. It has a cutting means for cutting (half cut). In this cutting, for example, based on the inspection result of the defect inspection apparatus in the manufacturing system, the cutting may be performed so as to distinguish the non-defective sheet piece from the defective sheet piece.

  Further, as a continuous roll, for example, (2) a roll of an optical film laminate having a carrier film and a sheet piece of an optical film containing an adhesive formed on the carrier film (so-called notched optics) Continuous roll of film).

(Liquid crystal display element)
In the liquid crystal display element, at least (two-color) polarizing film sheet pieces are formed on one or both sides of a liquid crystal panel, and a drive circuit is incorporated as necessary. As the liquid crystal panel, for example, an arbitrary type such as a vertical alignment (VA) type or an in-plane switching (IPS) type can be used. The liquid crystal panel 4 shown in FIG. 1 has a configuration in which a liquid crystal layer is sealed between a pair of substrates (a first substrate and a second substrate) arranged to face each other.

(Embodiment 1)
(Manufacturing method of liquid crystal display element)
Embodiment 1 will be described below. A liquid crystal display device manufacturing method includes a carrier film transport sub-step for transporting the carrier film from a continuous roll formed by winding a carrier film on which an optical film having a predetermined film width including an adhesive is laminated, and the carrier film. A cutting sub-step for forming the sheet piece of the optical film by cutting the optical film at a predetermined cutting interval in the film width direction orthogonal to the longitudinal direction of the optical film, and a transport sub-step for transporting the liquid crystal panel; Including two or more sheet piece laminating steps of an optical film including a pasting sub-step of laminating the sheet pieces peeled from the carrier film on the liquid crystal panel side via the adhesive while transporting the liquid crystal panel; By the two or more sheet piece lamination steps, two or more sheet pieces are turned into sheet pieces. DOO laminated on the liquid crystal panel side in order to form a liquid crystal display element. And in two or more sheet pieces laminated | stacked on the one side of the said liquid crystal panel, the film width of the sheet piece laminated | stacked first is the largest, and the film width of the sheet piece laminated | stacked after the next becomes small sequentially. The film width of the optical film wound around the two or more continuous rolls is set. The cutting sub-step is executed so that the cutting interval of the first laminated sheet pieces formed in the cutting sub-step is the largest, and the cutting intervals of the next and subsequent laminated sheet pieces are sequentially reduced. In this embodiment, in the sheet piece, the side corresponding to the film width of the optical film wound around the continuous roll is defined as the first side, the side orthogonal to the first side, and the side corresponding to the length of the cutting interval. Is the second side, the first side of the next sheet piece to be stacked next corresponds to the first side of the previous sheet piece previously stacked, The next sheet piece is laminated on the immediately preceding sheet piece so that the second side of the next sheet piece corresponds to the second side.

  In the following, one of the optical films is a two-color polarizing film, and one of the other optical films is described as a reflective polarizing film. In addition, the optical film laminated | stacked on a liquid crystal panel is not restrict | limited to this, Other optical films may be sufficient, and the 3rd (after) optical film may be laminated | stacked by the same sheet piece lamination | stacking step.

  The two-color polarizing film sheet piece laminating step laminates the two-color polarizing film sheet piece on the liquid crystal panel, and the reflective polarizing film sheet piece laminating step is the two-color polarizing film sheet piece. Laminate to. In this case, the two-color polarizing film and the reflective polarizing film will be described as having a transmission axis in the longitudinal direction perpendicular to the film width direction. Moreover, in this embodiment, the sheet piece lamination | stacking step of a 2 color polarizing film and the sheet piece lamination | stacking step of a reflective polarizing film are performed continuously.

  FIG. 1 shows a flowchart of an example of a method for manufacturing a liquid crystal display element. The sheet piece lamination step of the two-color polarizing film first laminated on the liquid crystal panel will be described. A continuous roll of two-color polarizing film is prepared (S1). The film width W1 of the two-color polarizing film is larger than the film width W2 of the reflective polarizing film laminated on the two-color polarizing film (W1> W2). The two-color polarizing film and the carrier film are fed out from the continuous roll and conveyed to the downstream side (carrier film conveyance sub-step, S2). As this conveyance means, for example, a feed roller, a tension roller, a dancer roller, a sensor for detecting a feed amount, a control unit for controlling the feed speed, the feed amount, and the like are configured.

  A sheet piece of the two-color polarizing film is formed by cutting the two-color polarizing film at a predetermined cutting interval L1 in the film width direction perpendicular to the longitudinal direction of the two-color polarizing film, leaving the carrier film (cutting sub-step, S3 ). Examples of the cutting means include a laser device, a cutter, and other cutting means.

  The sheet of the two-color polarizing film is peeled off from the carrier film by turning back at the leading end of the peeling means with the carrier film facing inward, and supplied to the application position. And while conveying a liquid crystal panel, the sheet piece of the 2 color polarizing film peeled from the carrier film is laminated | stacked on the liquid crystal panel side via an adhesive (attachment substep, S4). As a sticking means, for example, a pair of sticking rollers can be mentioned. There are a winding sub-step in which the carrier film from which the sheet piece has been peeled is wound, and a transport sub-step in which the liquid crystal panel is transported to the application position. Moreover, a conveyance substep conveys the liquid crystal panel with which the 2 color polarizing film was affixed to the sticking position with the following reflective polarizing film. The transport means of the liquid crystal panel includes, for example, a sticking roller pair, a transport roller, a suction plate, a control unit for controlling the transport speed, the feed amount, and the like.

  Next, the sheet piece lamination | stacking step of the reflective polarizing film laminated | stacked on a two-color polarizing film is demonstrated. A continuous roll of reflective polarizing film is prepared (S11). The film width W2 of the reflective polarizing film is smaller than the width W1 of the two-color polarizing film already laminated (see FIGS. 4A and 4B, W2 <W1). The reflective polarizing film and the carrier film are fed out from the continuous roll and conveyed to the downstream side (carrier film conveyance substep, S12).

  The reflective polarizing film is cut at a predetermined cutting interval L2 in the film width direction orthogonal to the longitudinal direction of the reflective polarizing film, leaving the carrier film, thereby forming a sheet piece of the reflective polarizing film (cutting substep, 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, L2 <L1).

  The sheet of the reflective polarizing film is peeled off from the carrier film by turning back at the leading end of the peeling means with the carrier film on the inside, and supplied to the application position. And while conveying a liquid crystal panel, the sheet piece of the reflective polarizing film peeled off from the carrier film is affixed on a two-color polarizing film through an adhesive (attachment substep, S14). The pasting means is the same as the pasting means. In the transport sub-step, the liquid crystal panel to which the reflective polarizing film is attached is transported to the next step.

  As another embodiment of the above embodiment, when a reflective polarizing film having a transmission axis in the longitudinal direction perpendicular to the film width direction is laminated on a two-color polarizing film having a transmission axis in the film width direction, the transport line of the liquid crystal panel is set to L After the two-color polarizing film sheet piece is laminated on the liquid crystal panel, the liquid crystal panel is conveyed along an L-shaped conveying line, and the reflective polarizing film sheet piece is used as the two-color polarizing film. Are laminated so that their transmission axis directions are in the same direction.

  Moreover, as another embodiment of the above embodiment, the sheet piece laminating step further includes a film inspection substep for inspecting the optical film, and the cutting substep cuts the optical film according to the inspection result of the film inspection substep. To do. Further, the cutting sub-step cuts the optical film determined to be defective according to the inspection result of the film inspection sub-step into a predetermined size (cut to avoid a defect (so-called skip cut)), and the optical film determined to be defective. The method further includes an exclusion sub-step for eliminating the sheet pieces. Further, the film inspection sub-step may read defect information previously attached to the optical film or the carrier film, and cut it so as to avoid the defect based on the defect information. As a defect inspection method, for example, there is a method of taking an image of transmitted light or reflected light on an optical film, subjecting the image to image processing, analyzing the defect, and determining whether the product is a good product or a defective product. Note that a known method can be applied to the image processing algorithm, and for example, a defect can be detected by density determination by binarization processing. The defect information obtained by the defect inspection is linked together with the position information (for example, position coordinates), transmitted to the control device (not shown), and contributes to the cutting process of the cutting sub-step.

  Further, as yet another embodiment, in the film inspection substep, it is preferable to inspect the optical film in a state where the carrier film is peeled off from the optical film, and to bond the carrier film to the optical film via an adhesive after the inspection. .

  Moreover, although the said embodiment demonstrated the method of laminating | stacking a two-color polarizing film and a reflective polarizing film in this order on one surface of a liquid crystal panel, this embodiment is not restrict | limited to this structure. Similarly, a two-color polarizing film can be laminated on the other surface of the liquid crystal panel. In this case, lamination is performed so that the transmission axis of the two-color polarizing film laminated on one surface of the liquid crystal panel and the transmission axis of the two-color polarizing film laminated on the other surface are in a crossed Nicols relationship.

(Liquid crystal display device manufacturing system)
The manufacturing system of the liquid crystal display element of Embodiment 1 is demonstrated referring FIG. The liquid crystal display element manufacturing system includes a carrier film transporting means for transporting the carrier film from a continuous roll formed by winding a carrier film on which an optical film having a predetermined film width including an adhesive is laminated, and the carrier film. A cutting means for forming a sheet piece of the optical film by cutting the optical film at a predetermined cutting interval in the film width direction orthogonal to the longitudinal direction of the optical film, a transport means for transporting the liquid crystal panel, and the liquid crystal panel Two or more sheet piece laminating apparatuses for optical films, each having a sticking means for laminating the sheet pieces peeled from the carrier film on the liquid crystal panel side via the pressure-sensitive adhesive. By the two or more sheet piece laminating apparatuses, two or more sheet pieces are sequentially laminated on the liquid crystal panel side for each sheet piece to form a liquid crystal display element. Then, the manufacturing system controls the cutting means and the carrier film conveying means so that the cutting interval of the sheet pieces to be laminated first is the largest, and the cutting intervals of the sheet pieces to be laminated after the next are sequentially reduced. The cutting means of the sheet piece laminating apparatus has a control unit, the cutting interval of the sheet piece that is laminated first is the largest, so that the cutting interval of the sheet pieces that are laminated next is sequentially reduced, Cut the optical film. That is, the size relationship of the cutting interval L of the sheet pieces (first sheet, second sheet, n-th sheet, n + 1-th sheet,...) Sequentially stacked on the liquid crystal panel is L _n > L _{n + 1} .

  In the following, the two sheet pieces laminated on one surface of the liquid crystal panel are a two-color polarizing film and a reflective polarizing film, but are not limited thereto, and may be other optical films. The optical film (after) may be laminated by the same sheet piece laminating apparatus.

  The two sheet piece laminating apparatuses are a sheet piece laminating apparatus 301 for laminating the sheet pieces of the two-color polarizing film, and a sheet piece laminating apparatus for laminating the sheet pieces of the reflective polarizing film on the sheet pieces of the two-color polarizing film. 302. In this embodiment, the two-color polarizing film sheet piece laminating apparatus 301 and the reflective polarizing film sheet piece laminating apparatus 302 are arranged 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. The reflective polarizing film has a transmission axis in the longitudinal direction and a reflection axis in the film width direction. And it is the relationship of film width W1 of a two-color polarizing film> film width W2 of a reflective polarizing film.

  The two-color polarizing film sheet piece laminating apparatus 301 shown in FIG. 3 includes a carrier film transport unit 101, a liquid crystal panel transport unit 102, and a pasting unit 103 (a pasting roll 50a and a driving roll 50b). The reflective polarizing film sheet piece laminating apparatus 302 includes a liquid crystal panel transport unit 202, a carrier film transport unit 201, and a pasting unit 203 (a pasting roll, a driving roll). In this embodiment, a sheet piece 131 of a two-color polarizing film is attached from the upper side of the liquid crystal panel 4, and then a sheet piece 231 of a reflective polarizing film is attached from the upper side of the liquid crystal panel 4. In addition, it is not restrict | limited to this sticking method, For example, the sheet piece of a 2 color polarizing film may be stuck from the lower side of a liquid crystal panel, and the sheet piece of a reflective polarizing film may be stuck from the lower side of a liquid crystal panel, The optical film may be attached from the upper side of the liquid crystal panel, and the other optical film may be attached from the lower side of the liquid crystal panel.

(Liquid crystal panel transport means)
The liquid crystal panel transport unit 102 supplies and transports the liquid crystal panel 4 to the pasting unit 103. In the present embodiment, the liquid crystal panel transport unit 102 includes a transport roller 80 and a suction plate. The liquid crystal panel 4 is transported downstream of the production line by rotating the transport roller 80 or by transferring the suction plate.

(Carrier film transport means)
The carrier film conveying means 101 feeds out the carrier film 12 on which the two-color polarizing film 13 containing the adhesive is laminated from the continuous roll 1, and cuts the two-color polarizing film 13 at a predetermined cutting interval L1 while leaving the carrier film 12. A two-color polarizing film sheet piece 131 is formed on the carrier film 12 and folded at the tip of the peeling means 40 with the carrier film 12 facing inward, and the two-color polarizing film sheet piece 131 (adhesive is removed) from the carrier film 12. Including) is peeled off and supplied to the pasting means 103. For this purpose, the carrier film transport unit 101 includes a cutting unit 20, a dancer roll 30, a peeling unit 40, and a winding unit 60.

  The cutting means 20 fixes the carrier film 12 by the adsorption means 20a, cuts the two-color polarizing film 13 at a predetermined interval L1 while leaving the carrier film, and the sheet piece 131 of the two-color polarizing film on the carrier film 12. Form. Examples of the cutting means 20 include a cutter and a laser device.

  The dancer roll 30 has a function of maintaining the tension of the carrier film 12. The carrier film transport unit 101 transports the carrier film 12 via the dancer roll 30.

  When the sheet piece 131 is attached to the liquid crystal panel 4, the peeling means 40 is folded back with the carrier film 12 facing inward at the tip, and the sheet piece 131 is peeled from the carrier film 12. In the present embodiment, the peeling means 40 uses a sharp knife edge portion at the tip portion, but is not limited to this.

  The winding means 60 winds up the carrier film 12 from which the sheet piece 131 has been peeled off. Note that a feed roller may be further provided between the sticking unit 103 and the winding unit 60.

(Paste means)
The sticking means 103 sticks the sheet piece 131 of the two-color polarizing film supplied by the carrier film transport means 101 from above the liquid crystal panel 4 supplied by the liquid crystal panel transport means 102 via an adhesive. In the present embodiment, the sticking means 103 includes a sticking roller 50a and a driving roller 50b.

(Control part)
The control unit 300 controls the cutting unit 20 and the carrier film transport unit 101 to control the cutting interval L1 of the sheet piece 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 piece 131 of the two-color polarizing film (see FIGS. 4A to 4C). The controller 300 controls the cutting means 20 and the carrier film transport means 101 so that the cutting interval L1 of the two-color polarizing film is the largest and the cutting interval L2 of the reflective polarizing film to be laminated next is smaller than L1. For example, the predetermined intervals L1 and L2 for cutting are stored in advance in the memory of the control unit 300, and the control unit 300 controls the feeding amount of the carrier film and the cutting process so as to cut at the predetermined intervals L1 and L2. To do. The feed amount may be measured, for example, by detection of an encoder that measures the rotation amount of a feed roller or the like that constitutes a part of the carrier film transport unit 101, 201.

  Next, the reflective polarizing film sheet piece laminating apparatus 302 will be described. The reflective polarizing film sheet piece laminating apparatus 302 is an apparatus for attaching the reflective polarizing film sheet piece 231 to the two-color polarizing film sheet piece 131 laminated on the liquid crystal panel 4. Since it is the same structure as a lamination apparatus, it demonstrates easily.

  The liquid crystal panel transport unit 202 transports the liquid crystal panel 4 on which the sheet piece 131 is pasted by the pasting unit 103 and supplies it to the pasting unit 203.

  The carrier film transport unit 201 can be configured by the same device as the carrier film transport unit 101, and the pasting unit 203 can be configured by the same device as the pasting unit 103. For example, the dancer roll can be constituted by the same device as the dancer roll 30, the winding means can be constituted by the same device as the winding means 60, and the sticking roller and the driving roller have the same mechanism as the sticking roller 50a and the driving roller 50b. Can be configured.

  The cutting means 20 fixes the carrier film 22 by the adsorption means 20a, cuts the reflective polarizing film 23 at a predetermined interval L2 (L1> L2), leaving the carrier film 22, and the reflective polarizing film on the carrier film 22 The sheet piece 231 is formed.

  The affixing means 203 is a sheet piece 131 of a two-color polarizing film that is obtained by applying a sheet piece 231 of a reflective polarizing film supplied by a carrier film conveying means 201 from above the liquid crystal panel 4 supplied by a liquid crystal panel conveying means 202 via an adhesive. Paste to. The sticking means 203 includes a cross line (dashed line P1 in FIG. 4A) between the central axis line in the width direction of the sheet piece 131 of the two-color polarizing film and the central axis line in the direction orthogonal to the width direction, and the sheet piece of the reflective polarizing film. The sheet piece 231 of the reflective polarizing film is two colors so that the crossing line (broken line P2 in FIG. 4B) of the width direction center axis line 231 and the center axis line in the direction orthogonal to the width direction match or substantially match. It is preferable to laminate | stack on the sheet piece 131 of a polarizing film. This is because it is preferable to stack the sheet pieces in consideration of the amount of sticking deviation (X direction deviation, Y direction deviation, θ deviation).

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

  The liquid crystal panel transport unit 204 transports the liquid crystal panel in which the sheet piece 131 of the two-color polarizing film and the sheet piece 231 of the reflective polarizing film are laminated to the downstream side.

  Moreover, you may affix optical films, such as a sheet piece of a 2 color polarizing film, to another surface of the liquid crystal panel in which the sheet piece is not laminated | stacked on the conveyance downstream using another sheet piece lamination apparatus.

  An inspection device for inspecting a liquid crystal display element in which a two-color polarizing film or the like is laminated on both sides may be installed on the downstream side of the conveyance. The inspection purpose and inspection method of this inspection apparatus are not particularly limited.

(Embodiment 2)
The manufacturing method according to the second embodiment includes an inspection step of optically inspecting the liquid crystal panel after laminating the sheet pieces of the two-color polarizing film on both surfaces of the liquid crystal panel by two sheet piece laminating steps of the two-color polarizing film. Run. And after the inspection by the inspection step, the sheet piece lamination step of the reflective polarizing film is executed, and the transmission axis of the sheet piece of the two-color polarizing film is applied to the sheet piece of the two-color polarizing film laminated on one surface of the liquid crystal panel. A sheet piece of a reflective polarizing film having a transmission axis in the same direction as the direction is laminated. In this embodiment, the sheet piece laminating step of the two two-color polarizing films, the inspection step and the sheet piece laminating step of the reflective polarizing film are continuously performed, but not particularly limited thereto, as another embodiment, The two two-color polarizing film sheet piece laminating steps may be performed in succession, or the two two-color polarizing film sheet piece laminating steps and the inspection step may be performed sequentially. You may perform a sheet piece lamination | stacking step continuously.

  FIG. 2 shows a manufacturing flowchart of the second embodiment. First, a sheet piece of a two-color polarizing film is attached to one side of the liquid crystal panel (two-color polarizing film sheet piece stacking step, S21). Next, a sheet piece of a two-color polarizing film is attached to the other side of the liquid crystal panel (two-color polarizing film sheet piece stacking step, S22). The sheet piece laminating step of the two-color polarizing film is the same as each step of Step S1 to Step S4 of the first embodiment. The transmission axis of the two-color polarizing film laminated on one side of the liquid crystal panel and the transmission axis of the two-color polarizing film laminated on the other side are laminated so as to have a crossed Nicols relationship.

  Next, the liquid crystal panel with the two-color polarizing film sheet pieces attached on both sides is irradiated with light on the two-color polarizing film surface on the back side (backlight side) to capture the reflected light image. . In addition, the two-color polarizing film surface on the backlight side (back side) is irradiated with light, and a transmitted light image is captured. Image processing is performed on the image data obtained by imaging, and it is determined whether or not there is a defect such as a foreign matter or a bubble present inside the two-color polarizing film or between the two-color polarizing film and the liquid crystal panel (inspection step, S23). . When it is determined that the product is non-defective (normal product), the liquid crystal display panel is transported to a position where it is attached to the reflective polarizing film. And the sheet piece of a reflective polarizing film is affixed on the 2 color polarizing film used as the back side of a liquid crystal panel (sheet piece lamination | stacking step of a reflective polarizing film, S25). The sheet piece lamination step of the reflective polarizing film is the same as each step from Step S11 to Step S14 in the first embodiment. In addition, it laminates | stacks so that the transmission axis of a two-color polarizing film and the transmission axis of the reflective polarizing film laminated | stacked on this two-color polarizing film may become the same direction. On the other hand, when it is determined as a defective product, the liquid crystal panel is conveyed to the defective product port and eliminated (exclusion step, S26).

(Manufacturing system)
The manufacturing system of Embodiment 2 will be described with reference to FIG. In this embodiment, the sheet piece laminating device for two two-color polarizing films, the inspection device, and the sheet piece laminating device for reflective polarizing films are arranged in a continuous production line. A polarizing film sheet piece laminating device may be arranged on a continuous production line, or two two-color polarizing film sheet piece laminating devices and an inspection device may be arranged on a continuous production line. You may arrange | position a sheet piece lamination | stacking apparatus in a continuous production line.

  Sheet piece laminating apparatuses 501 and 502 shown in FIG. 5 have the same configuration as the sheet piece laminating apparatus for the two-color polarizing film of the first embodiment. The sheet piece laminating device 501 laminates a sheet piece 131 of a two-color polarizing film on the viewing side of the liquid crystal panel, and the sheet piece laminating device 502 is a sheet piece of the two-color polarizing film on the back side (backlight side) of the liquid crystal panel. 131 are stacked. As in the first embodiment, the sheet piece laminating apparatuses 501 and 502 are arranged so that the transmission axis between the sheet pieces of the two-color polarizing film laminated on both surfaces of the liquid crystal panel is crossed Nicol. Pieces may be laminated, or sheet pieces may be laminated from the lower side of the liquid crystal panel. You may have a 90 degree horizontal rotation mechanism, a vertical inversion mechanism, etc. as needed.

  The liquid crystal panel in which the sheet pieces of the two-color polarizing film are laminated on both sides is conveyed to the inspection device 400 by the liquid crystal panel conveying means 202. The inspection device 400 optically inspects the liquid crystal panel. The inspection apparatus 400 irradiates light perpendicularly to a surface (from the top to the bottom in FIG. 5) which is the back side of the liquid crystal panel that has been conveyed. Light from the irradiation unit 401 is reflected by a half mirror (not shown) and irradiates the liquid crystal panel. The reflected light image by this irradiation is picked up by the image pickup means 402. The transmitted light image is picked up by the image pickup means 403. The image data obtained by imaging is subjected to image processing by the information processing unit of the inspection apparatus 400, the defect is analyzed, and the determination unit determines whether it is a non-defective product or a defective product.

  Next, the reflection polarizing film sheet piece laminating apparatus 503 having the same configuration as that of the first embodiment is applied to the sheet piece 131 of the two-color polarizing film laminated on the back surface side of the liquid crystal panel after the inspection by the inspection apparatus 400. The sheet piece 231 of the reflective polarizing film is pasted so that the direction of the transmission axis of the sheet piece 131 of the two-color polarizing film is the same as the direction of the transmission axis of the sheet piece 232 of the reflective polarizing film. The sheet piece laminating apparatus 503 attaches the sheet piece 231 of the reflective polarizing film to the sheet piece 131 of the two-color polarizing film with respect to the liquid crystal panel determined to be a non-defective product based on the inspection result. The liquid crystal panel determined to be defective by the inspection result is conveyed to the defective product port and eliminated. The defective liquid crystal panel may be transported to the defective product port by the liquid crystal panel transport means 202, the sticking means 203, and the transport means 204.

  The operation timing of each of the above means and devices is calculated by, for example, a method of detecting by arranging a sensor at a predetermined position, or calculated by detecting the rotating member of the conveying means or the conveying mechanism with a rotary encoder or the like. Is done. The control unit may be realized by a cooperative action of a software program and a hardware resource such as a CPU and a memory. In this case, a memory is stored in advance for program software, a processing procedure, various settings, and the like. Further, it can be configured by a dedicated circuit or firmware.

(Embodiment 3)
The manufacturing method and the manufacturing system of the third embodiment are based on the configuration of the first embodiment, and the second sheet piece is pasted after the first sheet piece pasting substep (the pasting means 103). Before attaching, the liquid crystal panel 4 has a horizontal rotation process (horizontal rotation unit 90) for horizontally rotating by 90 ° with respect to the transport direction D (see FIGS. 6 and 7). Each component in the third embodiment has the same component as that in the first embodiment, and each component in FIGS. 6 and 7A to 7C corresponds to each component in FIGS. 3 and 4A to 4C. Therefore, description of each component is omitted, and different configurations will be described below.

  As shown in FIGS. 6 and 7A to 7C, the first sheet piece 131 is laminated on the liquid crystal panel 4. Then, before the second sheet piece 231 is stacked on the first sheet piece 131, the liquid crystal panel 4 is horizontally rotated by 90 ° with respect to the transport direction D. Next, the second sheet piece 231 is laminated on the first sheet piece 131. At the time of this pasting, the first side of the first sheet piece 131 (the film width of the optical film wound around the continuous roll) and the second side of the second sheet piece 231 (predetermined by the cutting means) Correspond to the top and bottom (in the thickness direction of the stack), the second side of the first sheet piece 131 (the side cut at a predetermined cutting interval by the cutting means), and 2 The first side of the first sheet piece 231 (the film width of the optical film wound around the continuous roll) corresponds to the top and bottom (the thickness direction of the lamination).

The horizontal rotating unit 90 is, for example, a mechanism in which the liquid crystal panel 4 is moved upward to move away from the liquid crystal panel transporting unit (for example, the transporting roller 80), and then horizontally rotated by 90 °, and then placed on the transporting roller 80. However, the present invention is not limited to this, and other mechanisms may be used.

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

(Example)
Using the sheet piece laminating apparatus of the first embodiment, a retardation film sheet piece (first sheet), a two-color polarizing film sheet piece (second sheet), and reflection are formed on one surface of a liquid crystal panel (32 inches). It laminated | stacked in order of the sheet piece (3rd sheet) of a polarizing film. In each of Examples 1 and 2 and Comparative Example 1, the number of evaluation samples was 100 (n = 100). The film widths W1 and W2 of the first retardation film, the second two-color polarizing film, and the third reflective polarizing film directly laminated on the liquid crystal panel in Examples 1 and 2 and Comparative Example 1, respectively. , W3, and cutting intervals L1, L2, and L3 are shown in Table 1, and their actual dimensions are shown in Table 2. Table 2 also shows the maximum amount of sticking misalignment (width direction (Y direction which is the film width direction), length direction (X direction which is the transport direction of the liquid crystal panel)), defect occurrence rate by visual inspection (%). Indicates. The amount of misalignment is the length (adhesive exposure amount) at which the third sheet piece protrudes from the second sheet piece and the adhesive (glue) of the third sheet piece is exposed, or the second sheet piece. The maximum length of the sheet piece that protrudes from the first sheet piece and the adhesive (glue) of the second sheet piece is exposed, and was measured with a digital caliper. The evaluation items for determining the defect were adhesive chipping, dirt, and foreign matter.

  From the result of Example 1, when the film width of the sheet piece and the relationship between the cutting intervals are W1> W2> W3 and L1> L2> L3, the third sheet piece protrudes from the second sheet piece. In addition, it was confirmed that the second sheet piece was attached without protruding from the first sheet piece. On the other hand, when the film width (W1 = W2 = W3) and the cutting interval (L1 = L2 = L3) of the first sheet, the second sheet, and the third sheet piece are the same from the result of Comparative Example 1, The result was that the second sheet piece could not be attached without protruding from the first sheet piece, and the third sheet piece could not be attached without protruding from the second sheet piece. In Comparative Example 2, the third sheet piece does not protrude from the first sheet piece, but protrudes from the second sheet piece. Therefore, in Example 1 in which the adhesive was not exposed, the defect occurrence rate was 0%, whereas in Comparative Examples 1 and 2 in which the adhesive was exposed, the occurrence of defects such as adhesive chipping, dirt, and foreign matter was observed. .

  From the results of Example 1, the film width direction of the first sheet, the second sheet and the third sheet, and the cutting interval are set in consideration of the maximum shift amount in the film width direction and the direction orthogonal to the film width direction. (W1 ≧ (W2 + maximum displacement amount in the width direction) ≧ (W3 + maximum displacement amount in the width direction), L1 ≧ (L2 + maximum displacement amount in the length direction ≧ (L3 + maximum displacement amount in the length direction)). Each maximum deviation amount can be set from the result of long-run operation of the manufacturing system.

1, 2 Continuous roll 4 Liquid crystal panel 20 Cutting means 40 Peeling means 90 Horizontal rotating part 101, 201 Carrier film conveying means 102, 202 Liquid crystal panel conveying means 103, 203 Adhering means 131 Sheet piece 231 of two-color polarizing film Reflective polarizing film Sheet piece 300 control unit

Claims (20)

From a continuous roll formed by winding a carrier film on which an optical film having a predetermined film width containing an adhesive is wound, a carrier film conveyance substep for conveying the carrier film, and a longitudinal direction of the optical film leaving the carrier film A cutting sub-step for forming the sheet piece of the optical film by cutting the optical film at a predetermined cutting interval in the film width direction orthogonal to the conveyance sub-step for conveying the liquid crystal panel, while conveying the liquid crystal panel, Including two or more sheet piece laminating steps of an optical film including a pasting sub-step of laminating the sheet pieces peeled from the carrier film on the liquid crystal panel side via the adhesive, and the two or more sheet piece laminating steps By putting two or more sheet pieces into the liquid crystal panel side in order for each sheet piece And a layer forming a liquid crystal display device, a manufacturing method for a liquid crystal display device,
In two or more sheet pieces laminated on one side of the liquid crystal panel, each of the four sides of the sheet piece to be laminated next corresponds in the laminated state among the four sides of the sheet piece laminated immediately before A method for manufacturing a liquid crystal display element, wherein a film width of the optical film wound around the two or more continuous rolls is set so as to be smaller than a side to be cut, and the cutting interval in the cutting sub-step is set. In the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, a side perpendicular to the first side and a length corresponding to the length of the cutting interval is a second side. When it is defined as a side, the first side of the next sheet piece to be laminated next corresponds to the first side of the immediately preceding sheet piece that has been laminated first, and the second side of the immediately preceding sheet piece. On the other hand, the next sheet piece is laminated on the immediately preceding sheet piece so that the second side of the next sheet piece corresponds,
In two or more sheet pieces laminated on one side of the liquid crystal panel, the film width of the sheet piece laminated first is the largest, and the film width of the sheet piece laminated thereafter is sequentially reduced, The film width of the optical film wound around the two or more continuous rolls is set, and the cutting interval of the first laminated sheet pieces formed in the cutting substep is the largest, and is laminated after the next. The method of manufacturing a liquid crystal display element according to claim 1, wherein the optical film is cut and the sheet pieces are formed in the cutting sub-step so that the cutting intervals of the sheet pieces to be sequentially reduced. A horizontal rotation step of horizontally rotating the liquid crystal panel on which the sheet pieces are laminated by the pasting sub-step by 90 ° horizontally with respect to the transport direction of the liquid crystal panel before the next sheet piece is laminated by the next pasting sub-step; ,
In the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, a side orthogonal to the first side and a side corresponding to the length of the cutting interval is the first side. When there are two sides, the second side of the next sheet piece corresponds to the first side of the immediately preceding sheet piece laminated before the horizontal rotation step, and the second side of the immediately preceding sheet piece corresponds to the first side. The next sheet piece is laminated on the immediately preceding sheet piece so that the first side of the next sheet piece corresponds to two sides,
An optical film wound around the continuous roll for forming the next sheet piece so that the first side of the next sheet piece is smaller than the second side of the immediately preceding sheet piece. Set film width, and
The cutting interval is set so that the second side of the next sheet piece is smaller than the first side of the immediately preceding sheet piece, and based on the cutting interval, the optical sub-step The manufacturing method of the liquid crystal display element of Claim 1 or 2 with which a film is cut | disconnected and the said following sheet piece is formed.   The manufacturing method of the liquid crystal display element of any one of Claims 1-3 with which the said 2 or more sheet piece lamination | stacking step is performed continuously. One of the optical films is a two-color polarizing film, and one of the other optical films is a reflective polarizing film,
In the sheet piece laminating step of the two-color polarizing film, the sheet piece of the two-color polarizing film is laminated on the liquid crystal panel,
In the step of laminating the sheet pieces of the reflective polarizing film, the sheet pieces of the reflective polarizing film are placed so that the transmission axis of the sheet pieces of the two-color polarizing film and the transmission axis of the sheet piece of the reflective polarizing film are in the same direction. The manufacturing method of the liquid crystal display element of any one of Claims 1-4 which laminate | stack the sheet piece of the said reflective polarizing film on the said liquid crystal panel by affixing on the sheet piece of the said 2 color polarizing film.   The method for producing a liquid crystal display element 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. And further comprising an inspection step of optically inspecting the liquid crystal panel after laminating the sheet pieces of the two-color polarizing film on both surfaces of the liquid crystal panel by two sheet piece laminating steps of the two-color polarizing film.
The reflective polarizing film sheet piece laminating step includes: after the inspection in the inspecting step, on the sheet piece of the two-color polarizing film laminated on one surface of the liquid crystal panel; and the direction of the transmission axis of the sheet piece of the two-color polarizing film The manufacturing method of the liquid crystal display element of Claim 5 or 6 which affixes the sheet piece of the said reflective polarizing film so that the direction of the transmission axis of the sheet piece of a reflective polarizing film may become the same. From a continuous roll formed by winding a carrier film on which an optical film having a predetermined film width including an adhesive is wound, carrier film transport means for transporting the carrier film, and the longitudinal direction of the optical film leaving the carrier film A cutting means for cutting the optical film at a predetermined cutting interval in the orthogonal film width direction to form a sheet piece of the optical film, a conveying means for conveying the liquid crystal panel, and the carrier film while conveying the liquid crystal panel And two or more sheet piece laminating apparatuses for optical films, each having two or more optical film sheet laminating apparatuses. The two or more sheet piece laminating apparatuses comprise two or more optical film sheet laminating apparatuses. A liquid crystal display is formed by laminating the sheet pieces in order on the liquid crystal panel side for each sheet piece. A manufacturing system of elements,
In two or more sheet pieces laminated on one side of the liquid crystal panel, each of the four sides of the sheet piece to be laminated next corresponds in the laminated state among the four sides of the sheet piece laminated immediately before A system for manufacturing a liquid crystal display element, wherein the film width of the optical film wound around the two or more continuous rolls is set so as to be smaller than the side to be cut, and the cutting interval in the cutting means is set. In the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, a side perpendicular to the first side and a length corresponding to the length of the cutting interval is a second side. When it is defined as a side, the first side of the next sheet piece to be laminated next corresponds to the first side of the immediately preceding sheet piece that has been laminated first, and the second side of the immediately preceding sheet piece. On the other hand, the next sheet piece is laminated on the immediately preceding sheet piece so that the second side of the next sheet piece corresponds,
In the two or more sheet pieces laminated on one side of the liquid crystal panel, the film width of the sheet piece laminated first is the largest, and the film width of the sheet piece laminated next and thereafter is sequentially reduced. The film width of the optical film wound around two or more continuous rolls is set, and the cutting interval of the first laminated sheet piece is the largest, and the cutting interval of the next laminated sheet piece is sequentially The liquid crystal display element manufacturing system according to claim 8, wherein the cutting means of the sheet piece laminating apparatus cuts the optical film to form a sheet piece so as to be smaller. The liquid crystal panel in which the sheet pieces are laminated by the sticking means further includes a horizontal rotation unit that horizontally rotates 90 ° with respect to the transport direction of the liquid crystal panel before the next sheet piece is laminated by the next sticking means,
In the sheet piece, a side corresponding to the film width of the optical film wound around the continuous roll is defined as a first side, a side orthogonal to the first side and a side corresponding to the length of the cutting interval is the first side. When there are two sides, the second side of the next sheet piece corresponds to the first side of the immediately preceding sheet piece laminated before the rotation by the horizontal rotation unit, and The next sheet piece is laminated on the immediately preceding sheet piece so that the first side of the next sheet piece corresponds to the second side,
An optical film wound around the continuous roll for forming the next sheet piece so that the first side of the next sheet piece is smaller than the second side of the immediately preceding sheet piece. Set film width, and
The cutting interval is set so that the second side of the next sheet piece is smaller than the first side of the immediately preceding sheet piece, and based on the cutting interval, the cutting means is the optical film. The system for manufacturing a liquid crystal display element according to claim 8, wherein the next sheet piece is formed by cutting.   The manufacturing system of the liquid crystal display element of any one of Claims 8-10 which has arrange | positioned the said 2 or more sheet piece lamination | stacking apparatus in the continuous manufacturing line. One of the optical films is a two-color polarizing film, and one of the other optical films is a reflective polarizing film,
A two-color polarizing film sheet piece laminating apparatus laminates the two-color polarizing film sheet pieces on the liquid crystal panel,
The reflection polarizing film sheet piece laminating apparatus is arranged so that the transmission axis of the two-color polarizing film sheet piece and the transmission axis of the reflection polarizing film sheet piece are in the same direction. The manufacturing system of the liquid crystal display element of any one of Claims 8-11 which laminates | stacks the sheet piece of the said reflective polarizing film on the said liquid crystal panel by affixing on the sheet piece of the said 2 color polarizing film.   The liquid crystal display element manufacturing system according to 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 perpendicular to the film width direction. The two-color polarizing film sheet piece laminating apparatus further comprises an inspection device for optically inspecting the liquid crystal panel after laminating the two-color polarizing film sheet pieces on both surfaces of the liquid crystal panel,
The reflection polarizing film sheet piece laminating apparatus is configured such that, after inspection by the inspection apparatus, the direction of the transmission axis of the sheet piece of the two-color polarizing film is applied to the sheet piece of the two-color polarizing film laminated on one surface of the liquid crystal panel. The manufacturing system of the liquid crystal display element of Claim 12 or 13 which affixes the sheet piece of the said reflective polarizing film so that the direction of the transmission axis of the sheet piece of a reflective polarizing film may become the same. A carrier film transporting sub-step for transporting the carrier film from a continuous roll formed by winding a plurality of laminated carrier films adjacent to each other, and a liquid crystal panel; A sheet piece of an optical film comprising: a conveying sub-step for conveying; and an attaching sub-step for laminating the sheet piece peeled from the carrier film to the liquid crystal panel side via the adhesive while conveying the liquid crystal panel. A method for manufacturing a liquid crystal display element, comprising two or more laminating steps, wherein the two or more sheet piece laminating steps form a liquid crystal display element by laminating two or more sheet pieces sequentially on the liquid crystal panel side for each sheet piece. Because
In two or more sheet pieces laminated on one side of the liquid crystal panel, each of the four sides of the sheet piece to be laminated next corresponds in the laminated state among the four sides of the sheet piece laminated immediately before The film width of the sheet piece of the optical film wound around the two or more continuous rolls and the length in the direction orthogonal to the film width are set so as to be smaller than the sides to be manufactured. . In the sheet piece, the side corresponding to the film width of the sheet piece of the optical film wound around the continuous roll is defined as the first side, and the side corresponding to the length in the direction perpendicular to the film width is defined as the second side. When it is defined as a side, the first side of the next sheet piece to be laminated next corresponds to the first side of the immediately preceding sheet piece that has been laminated first, and the second side of the immediately preceding sheet piece. On the other hand, the next sheet piece is laminated on the immediately preceding sheet piece so that the second side of the next sheet piece corresponds,
Among two or more sheet pieces laminated on one surface of the liquid crystal panel, the film width of the sheet piece to be laminated first and the length in the direction perpendicular to the film width are the largest, and the sheet piece to be laminated thereafter The film width of the optical film wound around the two or more continuous rolls and the direction orthogonal to the film width so that the film width and the length in the direction orthogonal to the film width are successively reduced. The method for manufacturing a liquid crystal display element according to claim 15, wherein the length is set. A horizontal rotation step of horizontally rotating the liquid crystal panel on which the sheet pieces are laminated by the pasting sub-step by 90 ° horizontally with respect to the transport direction of the liquid crystal panel before the next sheet piece is laminated by the next pasting sub-step; ,
In the sheet piece, the side corresponding to the film width of the optical film wound around the continuous roll is defined as the first side, and the side corresponding to the length in the direction orthogonal to the film width is defined as the second side. The second side of the next sheet piece corresponds to the first side of the immediately preceding sheet piece laminated before the horizontal rotation step, and the second side of the immediately preceding sheet piece The next sheet piece is laminated on the immediately preceding sheet piece so that the first side of the next sheet piece corresponds,
The film width of the sheet piece of the optical film wound around the continuous roll is set so that the first side of the next sheet piece is smaller than the second side of the immediately preceding sheet piece, and,
A direction orthogonal to the film width of the sheet piece of the optical film wound around the continuous roll so that the second side of the next sheet piece is smaller than the first side of the immediately preceding sheet piece. The method for manufacturing a liquid crystal display element according to claim 15, wherein the length of the liquid crystal display element is set. Carrier film transport means for transporting the carrier film and a liquid crystal panel from a continuous roll formed by winding a carrier film in which a plurality of sheet pieces of an optical film having a predetermined film width including an adhesive are adjacent to each other are wound. A sheet piece laminating apparatus for an optical film, comprising: a conveying means for carrying out; and a sticking means for laminating the sheet piece peeled from the carrier film on the liquid crystal panel side via the adhesive while conveying the liquid crystal panel. A manufacturing system of a liquid crystal display element, comprising two or more, and forming a liquid crystal display element by laminating two or more sheet pieces sequentially on the liquid crystal panel side for each sheet piece by the two or more sheet piece laminating apparatus. ,
In two or more sheet pieces laminated on one side of the liquid crystal panel, each of the four sides of the sheet piece to be laminated next corresponds in the laminated state among the four sides of the sheet piece laminated immediately before A system for manufacturing a liquid crystal display element, in which the film width of the sheet piece of the optical film wound around the two or more continuous rolls and the length in the direction perpendicular to the film width are set so as to be smaller than the side to be . In the sheet piece, the side corresponding to the film width of the sheet piece of the optical film wound around the continuous roll is defined as the first side, and the side corresponding to the length in the direction perpendicular to the film width is defined as the second side. When it is defined as a side, the first side of the next sheet piece to be laminated next corresponds to the first side of the immediately preceding sheet piece that has been laminated first, and the second side of the immediately preceding sheet piece. On the other hand, the next sheet piece is laminated on the immediately preceding sheet piece so that the second side of the next sheet piece corresponds,
Among two or more sheet pieces laminated on one surface of the liquid crystal panel, the film width of the sheet piece to be laminated first and the length in the direction perpendicular to the film width are the largest, and the sheet piece to be laminated thereafter The film width of the optical film wound around the two or more continuous rolls and the direction orthogonal to the film width so that the film width and the length in the direction orthogonal to the film width are successively reduced. The liquid crystal display element manufacturing system according to claim 18, wherein the length is set. The liquid crystal panel in which the sheet pieces are laminated by the sticking means further includes a horizontal rotation unit that horizontally rotates 90 ° with respect to the transport direction of the liquid crystal panel before the next sheet piece is laminated by the next sticking means,
In the sheet piece, the side corresponding to the film width of the optical film wound around the continuous roll is defined as the first side, and the side corresponding to the length in the direction orthogonal to the film width is defined as the second side. The second side of the next sheet piece corresponds to the first side of the immediately preceding sheet piece stacked prior to rotation by the horizontal rotation unit, and the second side of the immediately preceding sheet piece On the other hand, the next sheet piece is laminated on the immediately preceding sheet piece so that the first side of the next sheet piece corresponds,
The film width of the sheet piece of the optical film wound around the continuous roll is set so that the first side of the next sheet piece is smaller than the second side of the immediately preceding sheet piece, and,
A direction orthogonal to the film width of the sheet piece of the optical film wound around the continuous roll so that the second side of the next sheet piece is smaller than the first side of the immediately preceding sheet piece. The system for manufacturing a liquid crystal display element according to claim 18, wherein the length is set.