JP2017021098A - Optical film member pasting device, optical film member pasting method, and method of manufacturing display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for nicely pasting an optical film member on a display panel while preventing entrapment of air bubbles and generation of wrinkles and unevenness even if the optical film member is warped during manufacturing of a display device.SOLUTION: An optical film member pasting device 10 of the present invention includes a measurement mechanism 6 for measuring warpage of a polarizing plate 3 prior to starting a pasting action by means of a pasting roller 5, and is configured to start the pasting action when a stage 4 holding the polarizing plate 3 is tilted with respect to a stage 2 holding a display panel 1 by a tilt angle that is determined based on a result of measurement made by the measurement mechanism 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to the production of flat panel display devices such as liquid crystal display devices, plasma displays, and organic EL displays, with respect to the display panel, a polarizing plate, a retardation plate, and an antireflection film having an adhesive layer formed on at least one surface. The present invention relates to a manufacturing method and a manufacturing apparatus for attaching an optical film member having an optical function such as a viewing angle correction film.

  Liquid crystal display devices (LCDs) are widely used as various display monitors such as liquid crystal televisions, mobile phones, personal computer monitors, car navigation systems, and POS terminals. Optical film members such as polarizing plates, retardation plates or viewing angle correction (wide view) films used in these liquid crystal display devices are mainly attached to the front or rear surface of the glass substrate of the liquid crystal display panel in the liquid crystal display device. In order to realize a predetermined display operation and optical characteristics in cooperation with a liquid crystal, an alignment film, and the like. Similarly, in a flat panel display device such as a plasma display or an organic EL display, an optical film member such as an antireflection film or a viewing angle correction film is attached to the display panel to improve display characteristics.

  Many of these optical film members are manufactured by stretching a polymer film or the like, and are warped at the manufacturing stage. In addition, in order to improve the optical characteristics, there are many laminated structures in which a plurality of different types of optical film members such as a polarizing plate, a retardation plate, or a viewing angle correction (wide view) film are bonded. More warp appears more remarkably due to the difference in characteristics such as residual stress and thermal expansion of each film. Further, in the state immediately before being attached to the liquid crystal display panel from which the separator provided for protecting the adhesive layer on the polarizing plate surface is peeled, the degree of warpage is often further deteriorated.

  In a conventional pasting apparatus for pasting a polarizing plate on, for example, a liquid crystal display panel, an automated apparatus is generally used. As the pasting operation, the liquid crystal display panel and the polarizing plate are held on different surface plates (stages), and after the separator on the polarizing plate surface is peeled off, one of the polarizing plates on which the adhesive layer is formed From the other surface side of the polarizing plate where the adhesive layer is not formed, with the surface of the polarizing plate facing toward the liquid crystal display panel and the tip of the polarizing plate being placed close to the liquid crystal display panel side The sticking roller is moved downward and the stage holding the liquid crystal display panel is moved horizontally with respect to the sticking roller while the polarizing plate is pressed against the surface of the liquid crystal display panel, and the sticking roller is moved along the surface of the liquid crystal display panel. Is relatively moved, the liquid crystal display panel comes into contact with the liquid crystal display panel in order from the front end of the polarizing plate close to the liquid crystal display panel, and the polarizing plate is attached to the liquid crystal display panel.

  Even if the automated polarizing plate automatic pasting apparatus as described above is used, the polarizing plate can be correctly pasted to some extent with good reproducibility as long as the shape of the polarizing plate is an ideal flat plate shape. However, as described above, many polarizing plates are warped, and there are various warping directions and degrees. Therefore, the laminating roller moves down and the liquid crystal is pressed when pressing the polarizing plate. It is difficult to make the position and timing when the front end of the polarizing plate contacts the display panel constant. In some cases, particularly when the direction of warping of the polarizing plate is close to the surface of the liquid crystal display panel and greatly warps, the liquid crystal display panel and the front end of the polarizing plate are pressed before pressing the polarizing plate by the attaching roller. Will come into contact. As a result, by starting to attach the polarizing plate from a position different from the predetermined polarizing plate attachment position, if it is applied as it is, the position where the polarizing plate is finally attached will be shifted, and simply applied. The mounting position accuracy is reduced. Furthermore, the tip of the polarizing plate once brought into contact with the liquid crystal display panel and semi-fixed to the surface of the liquid crystal display panel is displaced by coming into contact with the subsequent application roller, and the adhesive layer on the surface of the polarizing plate rubs against the surface of the liquid crystal display panel. Therefore, bubbles may be mixed between the liquid crystal display panel and the polarizing plate, or wrinkles may be generated on the surface of the polarizing plate. As a result, the quality of the manufactured liquid crystal display device is deteriorated.

  In particular, as a countermeasure against bubbles when sticking with a polarizing plate warped in a direction approaching the surface of a liquid crystal display panel, in Patent Document 1, the sticking is performed by vacuum suction using a sticking roller in which a slit-like suction groove is formed. By holding the polarizing plate in close contact with the roller surface, the shape of the front end of the polarizing plate before the pasting operation is all along the same roller surface, regardless of the presence or absence of warping, the direction of warping, and the degree of warping. A method intended to stabilize to a certain convex shape is disclosed.

JP 2002-357817 A

  However, in the method disclosed in Patent Document 1, the pasting roller usually uses a rubber such as urethane, so that it is difficult to process the groove, and the feasibility of the apparatus is poor. In addition, it is necessary to form a plurality of slit-like suction grooves around the entire circumference of the roller, whereas the suction grooves that are in contact with the polarizing plate are only a part of them, and most of the other suction grooves are It is constantly released without being in contact with the polarizing plate. Therefore, when a suction source common to all the suction grooves is provided as a relatively realizable configuration, it is insufficient in terms of the suction capability of the polarizing plate, and an independent suction source for each suction groove. If this is provided, the structure of the apparatus relating to the suction source and the affixing roller becomes complicated, and the feasibility of the apparatus is still poor. Furthermore, in the sticking roller in which the suction groove is formed, when the pressure is applied to the polarizing plate for sticking, the sticking pressure becomes nonuniform in the place where the groove is formed and the place where the groove is not formed, There is a concern that defects such as unevenness may occur in the manufactured display device due to the non-uniform state of the polarizing plate.

  In any case, even if the method disclosed in Patent Document 1 is used, it is not accompanied by the feasibility of the apparatus, and bubbles are mixed between the liquid crystal display panel and the polarizing plate. Even if it was possible to prevent wrinkles from occurring on the surface, after all, due to non-uniform pasting state of the polarizing plate, there is concern about the occurrence of defects such as unevenness in the manufactured display device, etc. It does not disclose a polarizing plate attaching apparatus or method that can favorably attach a polarizing plate. That is, conventionally, there is no device or method that can prevent the occurrence of air bubbles, wrinkles, unevenness, etc., and can adhere the optical film member to the display panel satisfactorily as a realistic device or method. It was.

  The present invention has been made in order to solve the problems as described above, and the object of the present invention is to prevent the occurrence of bubble mixing, wrinkles, unevenness, and the like with the realization. An optical film member attaching apparatus or method capable of satisfactorily attaching an optical film member to a panel is obtained.

  In the optical film member pasting apparatus of the present invention, the polarizing plate has a measuring mechanism for measuring the warping state of the polarizing plate before the pasting operation by the pasting roller, and the polarizing plate is mounted on the stage holding the display panel. The affixing operation is started in a state in which the stage holding is disposed at an inclination angle determined based on the measurement result obtained by the measurement mechanism.

  At the time of manufacturing display devices, with the feasibility of the pasting device to be used, including the optical film members that have warped, the occurrence of air bubbles, wrinkles, unevenness, etc. is prevented, and the display panel is optically A film member can be affixed favorably.

It is the schematic of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 1 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 2 of this invention. It is operation | movement explanatory drawing of the polarizing plate sticking apparatus of Embodiment 2 modification of this invention. It is a top view of the liquid crystal display panel in the liquid crystal display device of Embodiment 3 of this invention. It is sectional drawing of the liquid crystal display panel in the liquid crystal display device of Embodiment 3 of this invention. It is a flowchart which shows the assembly process in the manufacturing method of the liquid crystal display panel in Embodiment 3 of this invention.

Embodiment 1 FIG.
As an example of an optical film member attaching apparatus to which the present invention is applied, a configuration of a polarizing plate attaching apparatus according to Embodiment 1 and a polarizing plate attaching method using this apparatus will be described. FIG. 1 is a schematic view of a main part showing a configuration of a polarizing plate pasting apparatus 10 according to the first embodiment. FIG. 1A is an external view seen from the side of the apparatus, and FIG. The external views as seen from the above are respectively shown. Hereinafter, the configuration of the polarizing plate pasting apparatus 10 will be described with reference to FIGS. 1 (a) and 1 (b).

  The drawings are schematic and do not reflect the exact size of the components shown. Further, in the figure, the same components as those described in the previous drawings are denoted by the same reference numerals, and the description thereof is omitted. The same applies to the following drawings. In addition, for convenience of explanation, in order to specify each direction in the figure, the XYZ direction is clearly shown as a three-dimensional axial direction, and the right side in FIGS. 1A and 1B is the X direction. (+ X direction), the upper side in FIG. 1A is the Z direction (+ Z direction), and the upper side in FIG. 1B is the Y direction (+ Y direction).

  As shown in FIG. 1 (a) and FIG. 1 (b), in this polarizing plate attaching apparatus 10, a panel holding stage 2 for holding a liquid crystal cell 1 as a display panel, and an optical film member The film member holding stage 4 for holding the polarizing plate 3 and the panel holding stage 2 can be moved up and down (the moving operation direction is indicated by an arrow in FIG. The liquid crystal cell 1 held on the panel holding stage 2 is moved horizontally along the surface of the liquid crystal cell 1 to move the polarizing plate 3 of the liquid crystal cell 1. Measures the position of the tip of polarizing plate 3 provided as a measuring mechanism for measuring the state of warping (the direction of warping and the degree of warping) before sticking of sticking roller 5 and polarizing plate 3 on the surface And a polarizing plate tip position measuring sensor mechanism 6 that. Further, since it is also provided in a general polarizing plate attaching apparatus, illustration and detailed description are omitted, but a carrying-in mechanism (illustrated) for carrying the liquid crystal cell 1 to which the optical film member is attached onto the holding stage 2. (Omitted), a film member supply mechanism (not shown) for supplying the polarizing plate 3 as an optical film member to be attached to the film member holding stage 4, and an adhesive layer on the surface of the polarizing plate 3 A separator peeling mechanism (not shown) that peels off the separator provided in the apparatus and a control mechanism (not shown) that controls the operation of the entire apparatus according to a predetermined operation program and operation sequence while exchanging information with each configuration.

  As for the film member holding stage 4, as a more detailed configuration, when the film member holding stage 4 holds the polarizing plate 3, the film member holding stage 4 is attached in the vicinity of the end of the polarizing plate 3 when the polarizing plate 3 starts to be applied. The tip relief portion 4a that can be separated from the tip of the polarizing plate 3 so as not to interfere with the attaching roller 5 (in FIG. A plurality of suction ports 4b for holding the polarizing plate 3 by suction and holding the polarizing plate 3, and a film member holding stage. Rotation operation mechanism 4c for rotating 4 is provided.

  As for the rotational operation mechanism 4c, FIG. 1 (a) shows only the connecting member that connects the rotating plate and the surface plate portion that holds the polarizing plate 3 in the film member holding stage 4. As a matter of course, a motor unit and a motor control system (both not shown) are provided as the drive system. Although not shown, the suction port 4b is connected to an exhaust system such as an exhaust pump via an exhaust path, and constitutes an exhaust mechanism together with these members. Furthermore, in this exhaust mechanism, a plurality of adsorbing ports 4b are provided with electromagnetic valves that open and close for each exhaust path corresponding to some areas so that the adsorption operation can be switched for each area. I have.

  Further, a more detailed configuration of the polarizing plate tip position measurement sensor mechanism 6 for measuring the position of the tip portion of the polarizing plate 3 which is a characteristic configuration of the present invention will be described below. The polarizing plate tip position measuring sensor mechanism 6 is a polarizing plate 3 in the Z direction in the drawing, that is, in the direction perpendicular to the surface of the liquid crystal cell 1 to which the polarizing plate 3 is attached or the holding surface of the liquid crystal cell 1 of the panel holding stage 2. The position of the polarizing plate tip position measuring sensor 6a for measuring the position of the tip portion of the liquid crystal and the liquid crystal in which the tip portion of the polarizing plate 3 held by the film member holding stage 4 in the X direction in FIG. A polarizing plate tip position measuring sensor 6b for measuring the position of the tip portion of the polarizing plate 3 in the extending direction of the end surface of the liquid crystal cell 1 perpendicular to the end surface of the cell 1 is provided.

  The polarizing plate tip position measurement sensor mechanism 6 is for specifying the two-dimensional position (particularly, the positional relationship in the X direction and Z direction) of the tip portion of the polarizing plate 3 held by the film member holding stage 4. Since the film member holding stage 4 holding the polarizing plate 3 is moved relative to the polarizing plate tip position measuring sensor mechanism 6 at the time of measurement, the polarizing plate tip position measuring sensor is provided. The tip end of the polarizing plate 3 held by the film member holding stage 4 is moved within the measurement range of the mechanism 6 (specifically, between the polarizing plate tip position measuring sensor 6a and the polarizing plate tip position measuring sensor 6b). A polarizing plate attaching device as long as it is within a possible range and a two-dimensional positional relationship (positional relationship in the X direction and Z direction) with the liquid crystal cell 1 held by the panel holding stage 2 can be specified. 10 It may be disposed at an appropriate position in the.

  In the polarizing plate attaching apparatus 10 of the first embodiment, as shown in FIG. 1A and FIG. 1B, it is disposed outside the holding portion of the liquid crystal cell 1 on the panel holding stage 2, It was fixed on the panel holding stage 2. In this way, the polarizing plate tip position measurement sensor mechanism 6 is interlocked with the panel holding stage 2 and the liquid crystal cell 1 held by the panel holding stage 2, and the position with respect to the liquid crystal cell 1 held by the panel holding stage 2. The relationship remains constant without fluctuation. That is, as in the case where the positional relationship between the two fluctuates, there is no need to manage the positional information of both, and the apparatus configuration can be simplified.

  Further, as a specific configuration of the polarizing plate tip position measuring sensor mechanism 6, the polarizing plate tip position measuring sensor 6a is parallel to the surface of the panel holding stage 2 as shown in FIG. A transmissive optical sensor having a pair of a general light projector and a light receiver can be used. Further, as shown in FIGS. 1 (a) and 1 (b), the polarizing plate tip position measuring sensor 6b is paired so as to face the panel holding stage 2 in the vertical direction (Z direction in the figure). A transmission type optical sensor that is configured by a sensor and that has a pair of a general projector and a light receiver can also be used. In the figure, the light projector and the light receiver are connected by a broken line simulating sensor light. Further, here, as shown in FIGS. 1A and 1B, the projector and the receiver are configured as a pair so that the position information can be measured at two locations apart from the tip of the polarizing plate 3. Two polarizing plate tip position measuring sensors 6 a or two polarizing plate tip position measuring sensors 6 b are arranged on the panel holding stage 2.

  Furthermore, in order to obtain two-dimensional position information of the tip of the polarizing plate 3 held by the film member holding stage 4, information obtained by the polarizing plate tip position measuring sensor 6a or the polarizing plate tip position measuring sensor 6b. Polarizing plate 3 managed in conjunction with the presence or absence of the tip of polarizing plate 3 to be detected between the pair of sensors described above of polarizing plate tip position measuring sensor 6a or polarizing plate tip position measuring sensor 6b. The tip of the polarizing plate 3 based on the position information (position information in the X direction and position information in the Z direction in addition to the position information of the tilt angle θ described in detail below) of the film member holding stage 4 in the state of holding the film The polarizing plate tip position measurement sensor mechanism 6 includes an information processing mechanism (not shown) for recording and managing the positional information of the film member holding stage 4 at the time when it is detected that there is a portion.

  In addition to the polarizing plate tip position measurement sensor mechanism 6 which has been described in detail above, the detailed configuration of the panel holding stage 2 is also provided in a general polarizing plate pasting apparatus. Although omitted, a suction holding mechanism for holding the liquid crystal cell 1, an alignment mechanism for positioning the liquid crystal cell 1 before suction at a predetermined position on the panel holding stage 2, and a panel holding stage mainly in the X and Z directions. A translation mechanism for translating 2 is provided. In addition, this parallel movement mechanism has all the parallel movement mechanisms on the film member holding stage 4 side, the adhering roller 5 side, and further on the transport mechanism side for carrying in and out the liquid crystal cell 1 on the panel holding stage 2. If the panel holding stage 2 does not need to be moved in a fixed state, it can be omitted.

  Subsequently, the detailed operation of the polarizing plate attaching apparatus 10 of the first embodiment, that is, the polarizing plate attaching method of the first embodiment will be described with reference to FIGS. Here, among the operations performed by the polarizing plate pasting apparatus 10 according to the first embodiment, particularly characteristic operations will be mainly described, and the operations performed also by a general polarizing plate pasting apparatus. Just a brief description. In addition, here, in order to explain the basic operation of the polarizing plate pasting apparatus 10, the polarizing plate 3 to be pasted will be described taking the case of the polarizing plate 3 a having no warp as an example. And

  First, the film member supply mechanism operates to supply the polarizing plate 3a as an optical film member to be attached to the film member holding stage 4, and the separator is peeled off as shown in FIG. 2 (a). The polarizing plate 3a in the state is prepared in a state where it is held by the film member holding stage 4. More specifically, by the film member supply mechanism, for example, the film member holding stage 4 is appropriately moved to the predetermined position with respect to the polarizing plate 3a prepared at the predetermined position, and the holding surface side is brought into contact therewith. In this state, by starting the suction by the suction port 4b provided in the film member holding stage 4, an operation of sucking and holding the polarizing plate 3a is performed. Furthermore, a separator peeling mechanism operates with respect to the polarizing plate 3a adsorb | sucked and hold | maintained on the film member holding | maintenance stage 4, a separator peels, and it will be in the state shown by Fig.2 (a). As shown in FIG. 2 (a), in the state where the tip escape portion 4a in the film member holding stage 4 is in a collapsed state, the polarizing plate 3a holding surface including the tip escape portion 4a is the same surface. By performing the suction operation by the suction port 4b, the separation operation of the separator is performed in a state where the film member holding stage 4 holds the entire surface of the polarizing plate 3a.

  On the other hand, the loading mechanism of the liquid crystal cell 1 operates to prepare the liquid crystal cell 1 being held at a predetermined position on the holding stage 2 as shown in FIG. More specifically, for example, when a loading robot or the like takes out one liquid crystal cell 1 from a cassette or the like that stores a plurality of liquid crystal cells 1 and places it on the panel holding stage 2, the liquid crystal cell 1 is placed on the panel holding stage 2. Loading operation of the liquid crystal cell 1 is performed. Further, the alignment mechanism is used to position the liquid crystal cell 1 that has been carried onto the panel holding stage 2 and before being sucked, at a predetermined position on the panel holding stage 2. After that, the liquid crystal cell 1 is sucked and held at a predetermined position on the panel holding stage 2 to be in the state shown in FIG.

  Subsequently, a measurement operation related to the position of the front end portion of the polarizing plate 3 a which is a characteristic operation in the polarizing plate pasting apparatus 10 of the first embodiment is performed by the polarizing plate front end position measuring sensor mechanism 6. A series of operations will be described with reference to FIGS. First, as shown in FIG. 3 (a), the position of the tip of the polarizing plate 3a held by the film member holding stage 4 using the polarizing plate tip position measuring sensor 6b, with respect to the position in the X direction in the figure. taking measurement.

  Note that, as shown in FIG. 3A, for the film member holding stage 4 holding the polarizing plate 3a, at the time of starting the measuring operation of the position of the leading end of the polarizing plate 3a, the leading end relief portion 4a is formed at the suction port 4b. It is in a state of getting up after releasing the adsorption. Therefore, the tip of the polarizing plate 3a is in a state where the separator is peeled off and is not directly held from the film member holding stage 4, and has a shape reflecting the warped state of the polarizing plate 3a before being attached. However, for the polarizing plate 3a used in the description with reference to FIG. 2 to FIG. 5, since the case where no warp occurs is taken as an example, as shown in FIG. Even when the film member is not directly held from the film member holding stage 4, it is shown as a generally flat surface (rectangular shape in a sectional view) without warping.

  Moreover, about the measurement of the position of the front-end | tip part of the polarizing plate 3a in the X direction performed here, as a preparatory stage of the measurement by the polarizing plate front-end | tip position measurement sensor mechanism 6 in the state which inclined the film member holding | maintenance stage 4 performed after that Corresponds to the positioning operation. Therefore, the polarizing plate application apparatus 10 is a target to be attached, that is, the degree of warping of the polarizing plate 3 to be measured, or the variation range of the warp is not so large, and the positioning operation is not performed. If there is no hindrance to the measurement by the polarizing plate tip position measurement sensor mechanism 6 in a state where the film member holding stage 4 is tilted thereafter, this positioning operation may be omitted.

  As a specific positioning operation, first, the position of the tip of the polarizing plate 3a with respect to the detection region by the pair of projector and light receiver of the polarizing plate tip position measuring sensor 6b is the + X side in the X direction in the figure. Relative movement is made so that it is closer to the -X side. Here, as indicated by the arrow in the direction of movement (+ X direction) in the figure, the panel holding stage 2 side on which the polarizing plate tip position measurement sensor 6b is disposed is operated, and the position of the tip portion of the polarizing plate 3a is moved. Then, the polarizing plate tip position measurement sensor 6b is brought closer. The polarizing plate tip position measurement sensor 6b is gradually brought closer to the position of the tip portion of the polarizing plate 3a, and when the position of the tip portion of the polarizing plate 3a enters the detection region of the polarizing plate tip position measurement sensor 6b. , Stop relative movement. A state in which the positioning is completed and the panel holding stage 2 and the polarizing plate tip position measuring sensor 6b are stopped corresponds to FIG.

  Note that it takes time from the detection of the approach of the position of the tip of the polarizing plate 3a to the stop of the moving operation of the panel holding stage 2 on which the polarizing plate tip position measuring sensor 6b is installed, and the positioning accuracy is insufficient. The information processing mechanism described above as the configuration moves while constantly monitoring the position information of the panel holding stage 2, and the position information of the panel holding stage 2 at the time of detection by the polarizing plate tip position measuring sensor 6 b is used as the source. In addition, it is preferable to slightly perform correction to return the panel holding stage 2 to the position at the time of detection. In this way, positioning can be performed more accurately.

  As described above, after the positioning operation by the polarizing plate tip position measuring sensor 6b is completed, subsequently, as shown in FIG. 3B, the polarizing plate tip position measuring sensor 6a is used to hold the film member holding stage 4 and the film member holding stage 4. In a state where the polarizing plate 3a is inclined, the position of the tip portion of the polarizing plate 3a is measured in the Z direction in the figure. About the measurement of the position of the front-end | tip part of the polarizing plate 3a of the Z direction in the state which inclined the polarizing plate 3a performed here, the curvature state (the direction of curvature, the extent of curvature) of the polarizing plate 3 to be attached is measured. Corresponding to the action to be performed.

  As a specific measurement operation of the warping state (the direction of warping, the degree of warping) of the polarizing plate 3a, as shown in FIG. By operating the film member holding stage 4 holding the polarizing plate 3a, the position of the tip of the polarizing plate 3a is set to 1 of the polarizing plate tip position measuring sensor 6a from the position where the positioning operation described above is completed. Gradually approaching the detection area by the pair of projector and light receiver, and the rotational movement is stopped when the position of the tip of the polarizing plate 3a enters the detection area of the polarizing plate tip position measuring sensor 6a. The state in which the detection by the polarizing plate tip position measuring sensor 6a is completed and the rotational movement of the film member holding stage 4 holding the polarizing plate 3a is stopped corresponds to FIG. As shown in FIG. 3B, the rotation angle θ1 of the film member holding stage 4 holding the polarizing plate 3a is measured when the polarizing plate tip position measuring sensor 6a detects the position of the tip of the polarizing plate 3a. As a result (recorded and managed by the information processing mechanism). The rotation angle θ1 is determined in accordance with the warpage state (the direction of warpage and the degree of warpage) of the polarizing plate 3a, and can be used as a measurement result that serves as a guide for indicating the warping state of the polarizing plate 3a. .

  In addition, the rotation angle θ1 of the film member holding stage 4 is in an optimum angle range of the polarizing plate 3a that comes into contact with the liquid crystal cell 1 when the polarizing plate 3a that has not been warped is applied. The central value may be set as the predetermined angle θ1. For example, if the optimum angle range for attaching the polarizing plate 3a is 15 ° ± 10 °, the angle of the tip of the polarizing plate 3 is changed by warping by setting the predetermined angle θ1 to 15 °. However, the tip of the polarizing plate 3a can be brought into contact with the liquid crystal cell 1 within a range closer to 15 degrees. It should be noted that the center value within the optimum angle range used in the above description may be set to approximately the center within the optimum angle range.

  In addition, in order for the polarizing plate 3a that is not warped to be attached at the predetermined angle θ1, the arrangement (positional relationship) of each component of the polarizing plate attaching device 10 is set to the predetermined angle θ1. It is necessary to arrange them together. Specifically, the tip portion of the polarizing plate 3a when the polarizing plate 3a having no warp is held at a predetermined position of the film member holding stage 4 and the rotation angle θ1 (for example, 15 degrees) is set. The position in the Z direction of the detection region of the polarizing plate tip position measurement sensor 6a may be arranged so as to coincide with this position.

  Even during the measurement operation of the state of warping (the direction of warping and the degree of warping) of the polarizing plate 3a, the polarizing plate 3a is detected from the detection of the position of the tip of the polarizing plate 3a in the polarizing plate tip position measuring sensor 6a. When it takes time to stop the rotation of the held film member holding stage 4 and the measurement accuracy of the warping state of the polarizing plate 3a is insufficient, the rotational position information of the film member holding stage 4 is constantly monitored. The rotation angle θ1 may be determined based on the rotation position information of the film member holding stage 4 at the time of detection by the polarizing plate tip position measurement sensor 6a.

  Subsequently, as shown in FIG. 4A, again using the polarizing plate tip position measurement sensor 6b, the film member holding stage 4 and the held polarizing plate 3a are inclined in the rotation angle θ1 in the X direction. The position of the tip of the polarizing plate 3a is measured. Regarding the measurement of the position of the tip of the polarizing plate 3a in the X direction, the polarizing plate 3a in the X direction with respect to the liquid crystal cell 1, including the case where the rotation angle θ1 that varies depending on the warping state of the polarizing plate 3 is different. This is performed in order to correct the deviation of the sticking start position of the polarizing plate 3 a with respect to the liquid crystal cell 1. That is, if the accuracy of the attaching position of the polarizing plate 3a with respect to the liquid crystal cell 1 is not so important, the measurement operation of the position of the tip in the X direction for the inclined polarizing plate 3a is omitted. It doesn't matter. Further, instead of performing this measurement operation, a predetermined correction value in the X direction (corresponding to the rotation angle θ1 of the polarizing plate 3a (the rotation axis and the tip of the polarizing plate 3a when held at a predetermined position) The panel holding stage 2 that holds the liquid crystal cell 1 by setting the correction value to the optimum value in advance, with the X direction component (the function of the rotation angle θ) of the distance between positions being easily calculated) set in advance. Then, the film member holding stage 4 holding the polarizing plate 3a is moved relative to the film member holding stage 4, and the operation of correcting the shift of the attaching position of the polarizing plate 3a is performed, so that the attaching position is hardly lowered. It is possible.

  Specifically, the measurement operation of the position of the front end portion of the polarizing plate 3a shown in FIG. 4A is performed in a state where the polarizing plate 3a and the film member holding stage 4 are inclined, as shown in FIG. There is almost no difference from the positioning operation described with reference to a). That is, in FIG. 4A, as indicated by the arrow in the movement direction (+ X direction), the panel holding stage 2 side on which the polarizing plate tip position measurement sensor 6b is arranged is operated and arranged at an inclination of the rotation angle θ1. The polarizing plate tip position measuring sensor 6b is gradually brought closer to the position of the tip portion of the polarizing plate 3a, and when the polarizing plate tip position measuring sensor 6b detects the tip of the polarizing plate 3a, the panel holding stage 2 movement operation is stopped. FIG. 4A corresponds to the state where the measurement operation of the position of the tip of the polarizing plate 3a is completed and the panel holding stage 2 and the polarizing plate tip position measuring sensor 6b are stopped.

  4A, the inclination angle of the film member holding stage 4 and the held polarizing plate 3a is brought into contact with the liquid crystal cell 1 when the polarizing plate 3a is applied. Since the angle θ1 is the optimum angle at the time, the film member holding stage 4 holding the polarizing plate 3a is maintained at the tilt angle, and the position of the tip of the polarizing plate 3a is positioned at the liquid crystal cell 1. If it is translated to a position close to the predetermined sticking start position P0, the position becomes the optimum position for starting the sticking process of the polarizing plate 3a as it is.

  In the state of FIG. 4A, the position of the tip of the polarizing plate 3a is measured in the X direction of the detection region of the polarizing plate tip position measuring sensor 6b and the polarizing plate tip position measurement, as can be seen from the figure. It coincides with the intersection of the position in the Z direction of the detection region of the sensor 6a. Therefore, the polarizing plate 3a sticking process described above is started by translating a predetermined sticking start position P0 in the liquid crystal cell 1 held on the panel holding stage 2 by a distance from the intersection. It can be set as the optimal arrangement | positioning. As shown in FIG. 4A, the specific distance necessary for this parallel movement is the distance Lx in the X direction, which is a predetermined pasting start position P0 and a detection region of the polarizing plate tip position measuring sensor 6b. The distance Lz in the Z direction is the distance between the predetermined sticking start position P0 and the position in the Z direction of the detection region of the polarizing plate tip position measuring sensor 6a. The predetermined value may be set when the configuration of the panel holding stage 2 is designed.

  Subsequently, as shown in FIG. 4B, the panel holding stage 2 in a state where the liquid crystal cell 1 is held is moved in parallel by the predetermined distance described above to start the attaching process of the polarizing plate 3a. Move to position. That is, the panel holding stage 2 is translated by a distance Lx in the X direction (+ X direction) and a distance Lz in the Z direction (+ Z direction) as indicated by arrows in the drawing. However, if the parallel movement is performed while the film member holding stage 4 holding the polarizing plate 3a is tilted, the polarizing plate 3a and the polarizing plate tip position measurement sensor 6 may interfere with each other. Therefore, in FIG. 4B, as indicated by the arrow in the direction of rotation of the film member holding stage 4 holding the polarizing plate 3a, the film member holding stage 4 holding the polarizing plate 3a is returned to the horizontal direction, This parallel movement was performed.

  Subsequently, as shown in FIG. 5A, the film member holding stage 4 holding the polarizing plate 3a is again determined based on the measurement result of the warpage state measured by the polarizing plate tip position measuring sensor 6a. The film member holding stage 4 is automatically tilted to the tilt angle by rotating by the rotation mechanism 4c by θ1 (the rotation direction of the film member holding stage 4 is indicated by an arrow). The state is before the start of the attaching process of the polarizing plate 3a. In addition, angle (theta) 1 which rotates this film member holding | maintenance stage 4 respond | corresponds to the stage inclination angle in a general polarizing plate sticking apparatus. In the state before the start of the sticking process, as shown in FIG. 5A, the tip of the polarizing plate 3a held by the film member holding stage 4 is close to a predetermined sticking start position P0 in the liquid crystal cell 1. The position is held at an angle θ 1 with respect to the liquid crystal cell 1. The sticking roller 5 is also moved down in the vicinity of the tip of the polarizing plate 3a as indicated by the arrow in the drawing.

  In the state shown in FIG. 5A, when the film member holding stage 4 is rotated, the tip of the polarizing plate 3a is brought into contact with a predetermined sticking start position P0 in the liquid crystal cell 1. Any of the cases in which the film member holding stage 4 is brought close to the film member holding stage 4 but not brought into contact with the film member holding stage 4 may be selected. Even when the film member holding stage 4 holding the former polarizing plate 3a is brought into contact at the time of rotating, the polarizing plate is obtained based on the measurement result of the tip portion of the polarizing plate 3a performed in advance. The position of the front end portion 3a and the pasting start position P0 are made to coincide with each other, and further, the abutting roller 5 is abutted at an angle θ1 which is an optimum angle when performing the pasting process. Can be optimally applied from the attachment start position P0 by the pressing operation by the lowering and the attaching operation in which the attaching roller 5 is relatively moved along the surface of the liquid crystal cell 1.

  On the other hand, when the latter film member holding stage 4 is rotated, if the tip of the polarizing plate 3a is brought close to the liquid crystal cell 1 but is not brought into contact with it, the subsequent application roller 5 is lowered. This corresponds to the case where contact is made for the first time by the pressing operation. Even in that case, the position of the front end portion of the polarizing plate 3a and the pasting start position P0 are almost matched based on the measurement result of the position of the front end portion of the polarizing plate 3a performed in advance. When the attaching process is performed, the contact is made at an angle θ1 which is an optimum angle, and the attaching roller 5 is moved along the surface of the liquid crystal cell 1 which is subsequently pressed by the attaching roller 5 being lowered. Can be optimally pasted from the pasting start position P0 by the pasting operation of relatively moving. In that case, in the state shown in FIG. 5 (a), the position of the tip of the polarizing plate 3a is arranged at an upper portion by a predetermined separation distance from the sticking start position P0. Therefore, the parallel movement of the holding stage 2 described with reference to FIG. 4B does not change the distance Lx in the X direction (+ X direction), but the distance Lz in the Z direction (+ Z direction). In other words, it is only necessary to move in parallel by the movement distance obtained by subtracting the predetermined separation distance. In addition, the predetermined separation distance is set so that the position of the tip of the polarizing plate 3a is the pasting start position P0 in consideration of various fluctuation factors in the polarizing plate pasting apparatus 10 (variations such as movement operation and measurement operation). However, it is preferable to set a minimum value with a margin in a range where they do not come into contact with each other even when the distance fluctuates in the closest direction.

  Subsequently, as shown in FIG. 5B, the panel holding stage 2 holding the liquid crystal cell 1 is held in the X direction (−X) while the polarizing plate 3 a is pressed against the surface of the liquid crystal cell 1 by the attaching roller 5. By horizontally moving in the direction), the attaching operation of the polarizing plate 3a is performed by the attaching roller 5. More specifically, as shown in FIG. 5A, the tip of the polarizing plate 3a was pressed against the surface of the liquid crystal cell 1 by the sticking roller 5 from the other surface side of the polarizing plate 3a on which the adhesive layer was not formed. In this state, as shown in FIG. 5B, the moving direction is indicated by an arrow in the figure, but the panel holding stage 2 holding the liquid crystal cell 1 is moved horizontally in the X direction (−X direction). The pasting roller 5 is relatively moved along the surface of the liquid crystal cell 1. Through the above relative movement operation, the polarizing plate 3a is in contact with the liquid crystal cell 1 by the attaching roller 5 in order from the tip of the polarizing plate 3a that has been pressed to the predetermined attaching start position P0 of the liquid crystal cell 1. The polarizing plate 3a is attached to the surface of the liquid crystal cell 1.

  Further, as shown in FIG. 5B, the panel holding stage 2 holding the liquid crystal cell 1 and the polarizing plate 3a attached to the surface of the liquid crystal cell 1 in order from the front end portion are in progress of the attaching operation. In response to this, it moves in the X direction (-X direction) direction in the figure. In that case, the polarizing plate 3 a is sequentially separated from the portion closer to the tip than the film member holding stage 4, and a part on the side opposite to the tip is sucked and held by the suction port 4 b of the film member holding stage 4. As it is, while sliding on the surface of the film member holding stage 4, it moves in the direction indicated by the dotted arrow in the figure. Finally, the adsorption of all the adsorption ports 4b is released, and the entire polarizing plate 3a is attached to the surface of the liquid crystal cell 1.

  Through the above operation, the polarizing plate 3a is attached to the liquid crystal cell 1 by the polarizing plate attaching apparatus 10 of the first embodiment. In the above description of the operation, an example in which the attaching operation by the attaching roller 5 is performed by horizontally moving the panel holding stage 2 holding the liquid crystal cell 1 with respect to the fixed attaching roller 5 will be described. However, since the affixing operation by the affixing roller 5 can be performed by the relative movement of the affixing roller 5 along the surface of the liquid crystal cell 1, a horizontal movement mechanism is provided on the affixing roller 5 side. The pasting operation may be performed by moving the pasting roller 5 horizontally along the surface of the liquid crystal cell 1. Further, the above description of the operation has been made by taking as an example the case where the polarizing plate 3a which has not been warped is processed, but the operation itself of the polarizing plate attaching apparatus 10 is not different from the operation described above. However, the processing state performed by the polarizing plate pasting apparatus 10 and the obtained action differ depending on the warping state (the direction of warping, the degree of warping) of the polarizing plate 3 to be attached. Next, a description will be given of a case where the polarizing plate 3b and the polarizing plate 3c that have warped in opposite directions, which are in a typical warped state, are bonded by the polarizing plate bonding apparatus 10, respectively.

  First, using FIG. 6 and FIG. 7, the direction in which the tip protrudes from the holding surface of the film member holding stage 4 (in other words, the direction in which the tip approaches the surface of the liquid crystal cell 1, or the bonding surface side is concave. A description will be given of the case where the polarizing plate 3b is attached to the polarizing plate 3b in which the warping in the warping direction) occurs. Here, in the description of the operation for attaching the polarizing plate 3b that has been warped by the polarizing plate attaching device 10, the emphasis is particularly on the operation portion in which a different processing state or a different action occurs due to the difference in the warping state. The explanation will be given.

  First, FIG. 6A shows a positioning operation performed by the polarizing plate tip position measuring sensor 6b described with reference to FIG. 3A, with the polarizing plate 3b having a warp in which a sticking surface side becomes a concave surface. This shows the state performed on the device. About a specific positioning operation, the position of the tip of the polarizing plate 3b in the X direction in the drawing is measured by the polarizing plate tip position measuring sensor 6b, but the polarizing plate 3a is not warped. As a difference from the case where it is performed, the protrusion amount in the X direction in the figure from the film member holding stage 4 is reduced by the amount of warpage of the polarizing plate 3b at the position of the tip of the polarizing plate 3b. In any case, by performing this positioning operation, the position of the tip of the polarizing plate 3b in the X direction is measured. As shown in the drawing, the tip of the polarizing plate 3b is located in the detection region of the polarizing plate tip position measuring sensor 6b. The panel holding stage 2 and the polarizing plate tip position measuring sensor 6b are stopped at the position where (abuts) is in contact, and the positioning operation is completed.

  Subsequently, FIG. 6B shows a warping state (direction of warping, warping of the polarizing plate 3 to be attached, which is performed by the polarizing plate tip position measuring sensor 6a described with reference to FIG. 3B. About the operation | movement which measures (degree), the state performed with respect to the polarizing plate 3b is shown. As a specific measurement operation of the state of warping (the direction of warping, the degree of warping) of the polarizing plate 3b, as shown in the drawing, the film member holding stage 4 holding the polarizing plate 3b is rotated to rotate the polarizing plate tip. The position measurement sensor 6a obtains the rotation angle θ2 of the film member holding stage 4 when the tip of the polarizing plate 3b enters the detection region as a measurement result.

  The rotation angle θ2 is used as a measurement result that serves as an indication of the state of warping of the polarizing plate 3b due to the magnitude relationship of the angle with the predetermined angle θ1 that is an angle when the polarizing plate 3a that does not warp is measured. can do. As is apparent from the figure, the polarizing plate 3b is measured by rotating the polarizing plate 3a that is not warped because the tip protrudes from the holding surface of the film member holding stage 4 due to warping. It will enter the detection area of the polarizing plate tip position measurement sensor 6a earlier than the case. Therefore, the angle θ2 that is the measurement result is set to be smaller than the predetermined angle θ1 that is a reference for the warpage state.

  Subsequently, FIG. 7A shows a polarizing plate 3 in the X direction with the film member holding stage 4 tilted by the polarizing plate tip position measurement sensor 6b described with reference to FIG. The state where the position of the tip of the liquid crystal is measured and the operation of correcting the displacement of the attaching position with respect to the liquid crystal cell 1 is performed on the polarizing plate 3b is shown. As a difference from the case where the polarizing plate 3a is not warped, the deviation in the X direction due to the inclination angle θ2 being smaller than θ1 and the deviation in the X direction caused by the warping of the polarizing plate 3b are combined. Since the shift of the distance occurs, the positional relationship in the X direction between the film member holding stage 4 and the holding stage 2 holding the liquid crystal cell 1 is different, and this difference corresponds to correction. As described above, the position of the front end portion of the polarizing plate 3b that is tilted at the same tilt angle θ2 as before the pasting process is specified.

  Subsequently, based on the arrangement shown in FIG. 7A, as described with reference to FIG. 4B, the holding stage 2 holding the liquid crystal cell 1 in the position before the start of the pasting process is parallel. Move. Regarding the distance to be translated, the predetermined sticking start position P0 in the liquid crystal cell 1 held on the panel holding stage 2, the position in the X direction of the detection region of the polarizing plate tip position measuring sensor 6b, and the polarizing plate tip position Since the positional relationship with the position of the tip of the polarizing plate 3b that coincides with the intersection of the position in the Z direction of the detection region of the measurement sensor 6a is the same as the positional relationship shown in FIG. As in the case of b), the distance Lx in the X direction (+ X direction), which is a predetermined distance, the distance Lz in the Z direction (+ Z direction), or as described above, the predetermined distance is subtracted from the distance Lz. The translation is performed for the distance moved. Further, as described above, this parallel movement is also performed here with the film member holding stage 4 holding the polarizing plate 3b returned to the horizontal direction.

  Next, FIG. 7B shows a state in which the movement to the position before the pasting process described with reference to FIG. As described above, the liquid crystal cell 1 is moved in parallel with the holding stage 2 in the state where the film member holding stage 4 holding the polarizing plate 3b is returned to the horizontal direction from the arrangement of FIG. By rotating the film member holding stage 4 holding the polarizing plate 3b by the rotation mechanism 4c by an angle θ2 determined based on the measurement result of the warped state measured by the polarizing plate tip position measuring sensor 6a. As shown in FIG. 7B, the film member holding stage 4 is in a state before the start of the attaching process of the polarizing plate 3b that is automatically inclined to the inclination angle. In the state before starting the pasting process, the position of the front end portion of the polarizing plate 3b that is tilted at the same inclination angle θ2 as before the pasting process start is specified, and the position of the front end portion and the pasting start position P0. As shown in FIG. 7 (b), the tip of the polarizing plate 3b held by the film member holding stage 4 is at a position close to a predetermined sticking start position P0 in the liquid crystal cell 1, The film member holding stage 4 tilted at an angle θ2 is tilted and held with respect to the liquid crystal cell 1. That is, as in the case of the polarizing plate 3a in which no warpage occurs, the tip end portion of the polarizing plate 3b can be arranged at an optimum position for pasting. The sticking roller 5 is also moved downward in the vicinity of the tip of the polarizing plate 3b, as indicated by the arrow in the drawing.

  Subsequently, as described with reference to FIG. 5B, the liquid crystal cell 1 held on the panel holding stage 2 is moved horizontally, and the sticking roller 5 is relatively moved along the surface of the liquid crystal cell 1. By doing so, the attaching operation of the polarizing plate 3b by the attaching roller 5 is performed. In the case of the polarizing plate 3b, since the tip portion protrudes from the holding surface of the film member holding stage 4, the polarizing plate 3b is substantially in contact with the liquid crystal cell 1 at the tip portion. This angle is larger than the angle θ2 of the holding surface of the film member holding stage 4. The substantial angle with which the tip of the polarizing plate 3b comes into contact does not completely coincide with the angle θ1 that is the optimum angle when performing the pasting process, but the inclination angle θ2 of the holding surface is not warped. Since the angle is smaller than the angle θ1 in the case of the polarizing plate 3a that has not been generated, that is, it is set at a shallow angle, the polarizing plate 3b with the protruding tip is left as it is by the film member holding stage 4 inclined to the angle θ1. Compared to the case of holding and pasting, the liquid crystal cell 1 is brought into contact with and pasted at an angle closer to the optimum angle θ1. That is, even when the polarizing plate 3b in which the warp in the direction in which the tip protrudes from the holding surface of the film member holding stage 4 is used, the state is close to the state when the polarizing plate 3a in which no warping has occurred is pasted. And can be applied optimally.

  Subsequently, using FIG. 8 and FIG. 9, the direction in which the front end part recedes from the holding surface of the film member holding stage 4 that is warped in the opposite direction to the polarizing plate 3 b (in other words, the front end part is from the surface of the liquid crystal cell 1. A case will be described in which the polarizing plate applying apparatus 10 is applied to the polarizing plate 3c in which the warping in the direction of leaving or the warping direction in which the attaching surface side becomes a convex surface) occurs.

  First, FIG. 8A shows a positioning operation performed by the polarizing plate tip position measuring sensor 6b described with reference to FIG. 3A, with the polarizing plate 3c having a warp in which the sticking surface side becomes a convex surface. This shows the state performed on the device. As a difference from the case where the polarizing plate 3a is not warped, the position of the tip of the polarizing plate 3c is equivalent to the amount of warping of the polarizing plate 3c in the drawing from the film member holding stage 4. The amount of protrusion in the X direction is reduced. In any case, by performing this positioning operation, the position of the tip of the polarizing plate 3c in the X direction is measured. As shown in the drawing, the tip of the polarizing plate 3c is located in the detection region of the polarizing plate tip position measuring sensor 6b. The panel holding stage 2 and the polarizing plate tip position measuring sensor 6b are stopped at the position where (abuts) is in contact, and the positioning operation is completed.

  Subsequently, FIG. 8B shows a warped state (direction of warping, warpage of the polarizing plate 3 to be attached by the polarizing plate tip position measuring sensor 6a described with reference to FIG. 3B. About the operation | movement which measures (degree), the state performed with respect to the polarizing plate 3c is shown. As shown in the drawing, the film member holding stage 4 holding the polarizing plate 3c is rotated, and the film member holding stage 4 at the time when the leading end portion of the polarizing plate 3c enters the detection region by the polarizing plate tip position measuring sensor 6a. Is obtained as a measurement result.

  The rotation angle θ3 is used as a measurement result that serves as an indication of the state of warping of the polarizing plate 3c due to the magnitude relationship of the angle with a predetermined angle θ1 that is an angle when the polarizing plate 3a without warping is measured. can do. As is apparent from the figure, the polarizing plate 3c is rotated by rotating the polarizing plate 3a that is not warped because the leading end is retracted from the holding surface of the film member holding stage 4 due to the warping. It will enter into the detection area of the polarizing plate tip position measuring sensor 6a later than the measurement. Accordingly, the angle θ3 that is the measurement result is larger than the predetermined angle θ1 that is a reference for the warped state.

  Subsequently, FIG. 9A shows a polarizing plate 3 in the X direction in a state in which the film member holding stage 4 is tilted, which is performed by the polarizing plate tip position measuring sensor 6b described with reference to FIG. The state of measuring the position of the tip portion of the liquid crystal cell and correcting the deviation of the attaching position with respect to the liquid crystal cell 1 shows the state performed on the polarizing plate 3c. As a difference from the case where the polarizing plate 3a is not warped, the deviation in the X direction due to the inclination angle θ3 being larger than θ1 and the deviation in the X direction caused by the warping of the polarizing plate 3c are combined. Since the shift of the distance occurs, the positional relationship in the X direction between the film member holding stage 4 and the holding stage 2 holding the liquid crystal cell 1 is different, and this difference corresponds to correction. As described above, the position of the front end portion of the polarizing plate 3c that is inclined at the same inclination angle θ3 as before the start of the pasting process is specified.

  Subsequently, based on the arrangement of FIG. 9A, as described with reference to FIG. 4B, the holding stage 2 holding the liquid crystal cell 1 in the position before starting the pasting process is parallel. Move. Regarding the distance to be translated, the predetermined sticking start position P0 in the liquid crystal cell 1 held on the panel holding stage 2, the position in the X direction of the detection region of the polarizing plate tip position measuring sensor 6b, and the polarizing plate tip position Since the positional relationship with the position of the tip of the polarizing plate 3c that coincides with the intersection of the position in the Z direction of the detection region of the measurement sensor 6a is the same as the positional relationship shown in FIG. As in the case of b), the distance Lx in the X direction (+ X direction), which is a predetermined distance, the distance Lz in the Z direction (+ Z direction), or as described above, the predetermined distance is subtracted from the distance Lz. The translation is performed for the distance moved. Further, as described above, this parallel movement is also performed here with the film member holding stage 4 holding the polarizing plate 3c returned to the horizontal direction.

  Subsequently, FIG. 9B shows a state in which the movement to the position before starting the pasting process described with reference to FIG. 9A, the liquid crystal cell 1 is moved in parallel with the holding stage 2 in the state where the film member holding stage 4 holding the polarizing plate 3c is returned to the horizontal direction from the arrangement shown in FIG. By rotating the film member holding stage 4 holding the polarizing plate 3c by the rotation mechanism 4c by an angle θ3 determined based on the measurement result of the warped state measured by the polarizing plate tip position measuring sensor 6a. As shown in FIG. 9B, the film member holding stage 4 is in a state before starting the attaching process of the polarizing plate 3c that is automatically inclined to the inclination angle. In the state before starting the pasting process, the position of the front end portion of the polarizing plate 3c tilted at the same inclination angle θ3 as that before the pasting process starts is specified, and the position of the front end portion and the pasting start position P0. 9B, as shown in FIG. 9B, at the position where the tip of the polarizing plate 3c held by the film member holding stage 4 is close to the predetermined sticking start position P0 in the liquid crystal cell 1, The film member holding stage 4 tilted at an angle θ3 is tilted and held with respect to the liquid crystal cell 1. That is, as in the case of the polarizing plate 3a in which no warpage occurs, the tip end portion of the polarizing plate 3c can be arranged at an optimum position for pasting. The sticking roller 5 is also moved downward in the vicinity of the tip of the polarizing plate 3c, as indicated by the arrow in the drawing.

  Subsequently, as described with reference to FIG. 5B, the liquid crystal cell 1 held on the panel holding stage 2 is moved horizontally, and the sticking roller 5 is relatively moved along the surface of the liquid crystal cell 1. By doing so, the attaching operation of the polarizing plate 3c by the attaching roller 5 is performed. In the case of this polarizing plate 3c, since the tip portion is retracted from the holding surface of the film member holding stage 4, the polarizing plate 3c is substantially in contact with the liquid crystal cell 1 at the tip portion of the polarizing plate 3c. This angle is smaller than the angle θ3 of the holding surface of the film member holding stage 4. The substantial angle with which the tip of the polarizing plate 3c abuts does not completely coincide with the angle θ1 that is the optimum angle when performing the pasting process, but the inclination angle θ3 of the holding surface is not warped. Since the angle θ1 is larger than that in the case of the polarizing plate 3a that is not generated, that is, it is set to a deep angle, the polarizing plate 3c whose tip is retreated is moved as it is by the film member holding stage 4 inclined to the angle θ1. Compared to the case of holding and pasting, the liquid crystal cell 1 is brought into contact with and pasted at an angle closer to the optimum angle θ1. That is, even when the polarizing plate 3c in which the warp in the direction in which the tip is retracted from the holding surface of the film member holding stage 4 is used, the state is close to the state when the polarizing plate 3a in which no warping has occurred is pasted. And can be applied optimally.

  As described above, in the polarizing plate pasting method using the polarizing plate pasting apparatus 10 according to the first embodiment, the warpage state of the polarizing plate 3 performed before the pasting operation by the pasting roller 5 is measured and evaluated. The tilt angle of the film member holding stage 4 that holds the polarizing plate 3 is optimized and determined based on the measurement result of the warping state of the polarizing plate 3 obtained by the measurement mechanism, and the determined tilt angle is set to the determined tilt angle. The pasting operation is started in a state in which the film member holding stage 4 holding the polarizing plate 3 is automatically inclined and arranged. As a result, the attaching operation of the polarizing plate 3 is performed in a state in which the inclination angle of the film member holding stage 4 holding the polarizing plate 3 to be brought into contact with the liquid crystal cell 1 is optimized according to the warped state, Including the polarizing plate 3 that has warped, the generation of bubbles, wrinkles, unevenness, etc. can be prevented, and the polarizing plate 3 can be satisfactorily adhered to the liquid crystal cell 1.

  In particular, in the polarizing plate pasting method using the polarizing plate pasting apparatus 10 according to the first embodiment, more specifically, even when the polarizing plate 3a that is not warped is stuck, the film member is retained. A polarizing plate in which no warpage occurs even when the polarizing plate 3b that has warped in the direction in which the tip protrudes from the holding surface of the stage 4 or the polarizing plate 3c in which the warping in the direction in which the tip retreats is attached. The angle θ1 for inclining the film member holding stage 4 when processing 3a is set as the center value of the optimum angle range of the polarizing plate 3a that is in contact with the liquid crystal cell 1, and is attached. When the polarizing state of the arbitrary polarizing plate 3 (the direction of warping) is measured before sticking, and the polarizing plate 3b that has warped in the direction in which the tip protrudes is pasted, a predetermined result obtained as a result of this measurement is obtained. When the angle θ2 smaller than the angle θ1 is used as the angle for inclining the film member holding stage 4 at the start of the pasting operation, and on the contrary, the polarizing plate 3c that has warped in the direction in which the tip is retracted is pasted. In this case, an angle θ3 larger than the predetermined angle θ1 obtained as a result of this measurement is used as it is as an angle for inclining the film member holding stage 4 at the start of the bonding operation, and a polarizing plate that does not warp When affixing 3a, the predetermined angle θ1 obtained as a result of this measurement is used as it is as an angle for inclining the film member holding stage 4 at the start of the affixing operation. Polarized light in which no warp occurs regardless of whether the direction of warping is from the polarizing plate 3a to the polarizing plate 3c. 3a can be pasted as a state close to the state when pasting.

  Moreover, in the polarizing plate sticking method using the polarizing plate sticking apparatus 10 of the first embodiment, the angle corresponding to the degree of warping (warping magnitude) of the polarizing plate 3b and the polarizing plate 3c described above. The angle θ2 and the angle θ3 are arbitrary, and the warpage state of an arbitrary polarizing plate 3 to be attached reflects not only the direction of the warpage but also the degree of warpage (the magnitude of the warpage). Accordingly, the degree of the angle smaller than the angle θ1 as described above or the degree of the angle larger than the angle θ1 is automatically set optimally, and is finer and is not warped. The polarizing plate 3a can be attached as a state close to the state when the polarizing plate 3a is attached. That is, it can be optimally applied in accordance with the warping state (the direction of warping, the degree of warping).

  Moreover, in the polarizing plate sticking method using the polarizing plate sticking apparatus 10 of this Embodiment 1, the film member holding | maintenance stage 4 holding the polarizing plate 3 is measured for the measurement of the curvature state of the polarizing plate 3 of the said description. It is performed by detecting the position of the tip of the polarizing plate 3 while tilting, and the tilt angle at the time of measuring the warp state corresponds to each warp state (the direction of warp and the degree of warp). The position of the front end of the polarizing plate 3 is set based on the measurement result of the position of the front end of the polarizing plate 3 that is set to the optimal angle and is held at the optimal angle, based on the arrangement at the time of measurement. And the liquid crystal cell 1 are translated by a distance matching the vicinity of the predetermined pasting start position P0 in the liquid crystal cell 1, and the pasting operation is started, so that the measurement operation in the warped state and the angle adjustment operation to the optimum angle can be performed simultaneously. In addition, In addition to being able to be performed automatically, the angle at the time of pasting is optimized in accordance with the warping state (the direction of warping, the degree of warping), and the polarizing plate 3 generated in accordance with the tilt angle. It is possible to automatically correct the positional deviation of the position of the tip portion with respect to the predetermined pasting start position P0, particularly the positional deviation in the X direction, and paste with high pasting position accuracy.

  Moreover, in the polarizing plate sticking apparatus 10 of this Embodiment 1, as above-mentioned, when the curvature state (direction of curvature) of the arbitrary polarizing plates 3 to be attached is measured before sticking, it is obtained as a measurement result. The method of using the angle θ1 to the angle θ3 as the angle for inclining the film member holding stage 4 at the start of the pasting operation has been described, but measurement of the warping state (warping direction) of the polarizing plate 3 has been described. Based on the results, the angle at which the film member holding stage 4 is inclined may be determined separately at the start of the attaching operation. Specifically, as described above, the warping state of the polarizing plate to be attached is measured with respect to an arbitrary polarizing plate 3 based on the angle θ1 when measured with respect to the polarizing plate 3a where no warping occurs. As a measurement result of the warped state performed before the attachment, the polarizing plate 3 is not warped when the angle θ1 is obtained, and the polarizing plate is obtained when an angle smaller than the angle θ1 is obtained. 3 is warped in the direction in which the tip projects from the holding surface of the film member holding stage 4, and when the angle larger than the angle θ 1 is obtained, the polarizing plate 3 holds the film member holding stage 4. The measurement result shows that the warp in the direction in which the tip part is retracted from the surface is obtained. From the measurement result of this warp state (warp direction), the following is shown at the beginning of the pasting operation. Determining the angle of inclination of the arm member holding stage 4.

  First, when it is obtained as a measurement result that any polarizing plate 3 is not warped, the central value within the range of the optimum angle of the polarizing plate 3 in contact with the liquid crystal cell 1 is obtained. If the measurement result shows that the angle further warps in the direction in which the tip protrudes, within a range of the optimum angle, the angle is set to a predetermined angle smaller than the center value. On the contrary, when it is obtained as a measurement result that the warp in the direction in which the tip portion is retracted, within a range of the optimum angle, a predetermined angle larger than the central value, In each case, by setting the angle at which the film member holding stage 4 is inclined at the start of the bonding operation, the polarizing plate 3a with no warpage is pasted in any warping state (warping direction) of the polarizing plate 3. It is close to the state when attaching It can be pasted. That is, it can be optimally applied in accordance with the warped state (warp direction).

  Further, using the measured angle, not only the direction of warping, but also the degree of warping is measured before pasting, and depending on the degree of warping, within the range of the optimum angle, By setting the degree to be an angle smaller than the central value or the degree to be an angle larger than the central value, it is closer to the state when sticking the polarizing plate 3a that is finer and does not generate warp. Can be pasted as a state. That is, it can be optimally applied in accordance with the warping state (the direction of warping, the degree of warping). It should be noted that the center value within the optimum angle range used in the above description may be set to approximately the center within the optimum angle range.

Embodiment 2. FIG.
In the polarizing plate pasting apparatus 10 according to the first embodiment described above, before the pasting operation by the pasting roller 5, measurement and evaluation including the direction of warping of the polarizing plate 3 and the degree of warping are performed. A description has been given of a pasting apparatus that can be adjusted including the angle and position at the time of pasting according to the warped state. In particular, the warped state that adversely affects the pasting of the polarizing plate 3 is a case where the polarizing plate 3b that has warped in the direction in which the tip protrudes from the holding surface of the film member holding stage 4 is processed. If the diaphragm is simplified, the measurement is performed to detect whether the polarizing plate 3b is in a warped state, and only when the warped polarizing plate 3b is detected, a predetermined countermeasure is taken. At a certain level, it can be satisfactorily applied and a desired effect can be obtained. Therefore, the polarization of the second embodiment, which is a modified example in which the configuration of the measurement mechanism for measuring and evaluating the warpage state (the direction of warpage and the degree of warpage) performed before the pasting operation by the pasting roller 5 is further simplified. The board sticking apparatus 10 and the sticking method will be described below with reference to FIG. Here, description will be made with emphasis on the changes from the first embodiment.

  In the configuration of the polarizing plate pasting apparatus 10a of Embodiment 2 described here and the polarizing plate pasting method using this apparatus, the film member holding stage 4 is held when held by the film member holding stage 4. The polarizing plate 3b that has warped in the direction in which the tip protrudes from the surface is the polarizing plate in the other warped state (for example, the polarizing plate 3a or the film member holding stage 4 that has not been warped as exemplified in the first embodiment). A measuring function is provided that can be distinguished from the polarizing plate 3c) in which the warp in the direction in which the front end part retreats from the holding surface is detected.

  Specifically, for example, as shown in FIG. 10A, in the polarizing plate pasting apparatus 10a, a film member is used as a measurement mechanism for measuring and evaluating the warpage state performed before the pasting operation by the pasting roller 5. Polarized light composed of a transmission type optical sensor composed of a pair of light projectors and light receivers in which a path (detection region) of sensor light is arranged substantially along the surface of the polarizing plate 3b with respect to the polarizing plate 3b held on the holding stage 4. A plate tip position measuring sensor 6c is arranged. The projector and the light receiver constituting the polarizing plate tip position measuring sensor 6c are basically provided on the panel holding stage 2 side as in the first embodiment, even if provided on the film member holding stage 4 side. However, in this case, at least one of the pair of projectors and light receivers is held by the film member so as to be suitable for arranging the detection region along the surface of the polarizing plate 3b held by the film member holding stage 4. Arranged on stage 4. About the other, as shown in figure, if the detection area | region can be arrange | positioned along the surface of the polarizing plate 3b, you may arrange | position in any.

  In addition, although the structure which is not evaluated to the extent of curvature is taken as an example here, for example, the polarizing plate 3b held on the film member holding stage 4 with respect to the polarizing plate tip position measuring sensor 6c is set in the Z direction in the figure. It is also possible to evaluate the degree of warpage (degree of protrusion) protruding from the holding surface of the film member holding stage 4 by relative movement. In that case, since the film member holding stage 4 and the polarizing plate tip position measuring sensor 6c need to operate independently, the polarizing plate tip position measuring sensor 6c is provided on the panel holding stage 2 side or is held by the film member. The stage 4 may be mounted so as to be movable in the direction perpendicular to the holding surface.

  FIG. 10A shows a state in which the processing is performed on the polarizing plate 3b to be detected. As a matter of course, in the actual processing, the warp exemplified in the first embodiment is used. In some cases, the polarizing plate 3c or the polarizing plate 3c that has warped in the direction in which the tip is retracted from the holding surface of the polarizing plate 3a or the film member holding stage 4 that has not been generated may be processed. In FIG. 4, the tip of the polarizing plate is not detected in the detection region of the polarizing plate tip position measuring sensor 6c, and is distinguished from the case where the polarizing plate 3b to be detected is processed.

  As described above, after the detection operation of the warp state by the polarizing plate tip position measurement sensor 6c is completed, the polarizing plate sticking apparatus 10a of the second embodiment performs the warp state obtained by the detection operation of the warp state. Two kinds of predetermined rotation angles (tilt angles) determined based on the measurement results, and the film member holding stage 4 holding the polarizing plate 3 rotate to hold the film member as shown in FIG. The stage 4 is in a state before the start of the attaching process of the polarizing plate 3b that is automatically inclined to the inclination angle. Here, the fact that the polarizing plate 3b that has warped in the direction in which the tip protrudes from the holding surface of the film member holding stage 4 is processed is detected by the measurement mechanism in the warped state described with reference to FIG. In such a case, one predetermined rotation angle (inclination angle) θ4 is moved to a state before starting the attaching process of the polarizing plate 3b. On the other hand, when the measurement mechanism detects that the polarizing plate 3a or the polarizing plate 3c is being processed instead of the polarizing plate 3b to be detected, the other predetermined rotation angle (tilt angle) θ1. It is rotated and moved to a state before the polarizing plate 3a or the polarizing plate 3c is attached.

  Here, with respect to the angle θ1 and the angle θ4 set as two kinds of predetermined rotation angles (tilt angles), when the polarizing film 3a with no warping is applied to the angle θ1, the liquid crystal is used. The center value of the optimum angle range of the polarizing plate 3a in contact with the cell 1 may be set as the predetermined angle θ1. Alternatively, here, the polarizing plate 3c having a warp in the direction in which the tip is retracted from the holding surface of the film member holding stage 4 at the same angle θ1 is also attached. An angle slightly larger than the value may be set. In addition, the angle θ4 is preferably set to a smaller angle than the angle θ1. This is the same reason that the inclination angle θ2 used when attaching the polarizing plate 3b in the first embodiment is set to an angle smaller than θ1, and in the case of the polarizing plate 3b, redundant explanation will be given. Since the tip portion protrudes from the holding surface of the film member holding stage 4, the substantial angle when the tip portion of the polarizing plate 3 b is brought into contact with the liquid crystal cell 1 is the film member holding stage. In consideration of the fact that the angle is larger than the angle θ4 of the holding surface 4, the angle θ4 is set smaller than the angle θ1. By doing so, it is possible to affix the liquid crystal cell 1 in contact with the liquid crystal cell 1 at an angle θ1 that is an optimum angle.

  Note that, as exemplified above, when the polarizing plate tip position measurement sensor 6c was evaluated to the degree of warpage (degree of protrusion) protruding from the holding surface of the film member holding stage 4, it was obtained by the measurement. By setting the degree of the angle θ4 to be smaller (larger to be smaller than the angle θ1) as the degree of warping (the degree of protrusion) is larger based on the information on the degree of protrusion particularly in the measurement result. Further, it can be attached as a state closer to the state when attaching the polarizing plate 3a that is finer and does not warp. That is, it can be optimally applied in accordance with the warping state (the direction of warping, the degree of warping).

  In the polarizing plate pasting apparatus 10b of the second embodiment described above, the basic configuration is the pasting operation by the pasting roller 5 as in the polarizing plate pasting apparatus 10 of the first embodiment. Tilt angle of the film member holding stage 4 that holds the polarizing plate 3 based on the measurement result about the warping state of the polarizing plate 3 obtained by the measurement mechanism for measuring and evaluating the warping state of the polarizing plate 3 performed before. , And the pasting operation is started in a state where it is automatically tilted and arranged at the determined tilt angle. Therefore, including the polarizing plate 3 that has warped, the occurrence of bubbles, wrinkles, unevenness, etc. can be prevented, and the polarizing plate 3 can be satisfactorily attached to the liquid crystal cell 1. You can get a good effect.

  Moreover, in the polarizing plate sticking apparatus 10 and the polarizing plate sticking apparatus 10a or the sticking method of Embodiment 1 and Embodiment 2 which were demonstrated above, the curvature state (warpage) of the polarizing plate 3 used as sticking object Direction, the degree of warping) is measured before pasting, and based on the measurement result of the obtained warping state, the inclination angle of the film member holding stage 4 holding the polarizing plate 3 is optimized and determined, The pasting operation is started in a state where the film member holding stage 4 holding the polarizing plate 3 is automatically inclined and arranged at the determined inclination angle. If the value is larger than a certain limit, even if the optimization adjustment as described above is performed, the product specification may not be satisfied, resulting in a failure. Since the liquid crystal cell 1 is a member with high added value, if it becomes a defective product at this stage, the entire manufacturing cost increases. Even if the rework process is possible, the substantial process tact time is greatly reduced, and the manufacturing cost is also increased. Note that the rework process referred to here is a process in which the polarizing plate 3 in a stuck state, which has become a defective product, is peeled off from the liquid crystal cell 1, and the cleaning process of the liquid crystal cell 1 and the pasting in which a new polarizing plate 3 is pasted again. It means to process.

  Therefore, when the degree of warping of the polarizing plate 3 is larger than a certain limit, the result of measuring the warping state (the direction of warping, the degree of warping) of the polarizing plate 3 according to the present invention before pasting is used. The effective method is to stop the pasting process and to perform the pasting process, or to perform the process of changing the warp state and within the limit, and then perform the pasting process. In particular, in the case of the second embodiment, since the adjustment for correcting the attachment position is not performed as in the first embodiment, the range of the degree of warping of the polarizing plate 3 that can be attached without any problem is compared. It is effective to use the above method. Therefore, a modification in which the above method is applied to, for example, the second embodiment will be described below with reference to FIG.

  First, FIG. 11A shows the polarization of the measurement mechanism that measures the warpage state (the direction of warpage and the degree of warpage) of the polarizing plate 3 to be pasted in the configuration of the second embodiment. The polarizing plate sticking apparatus 10b which added the detection function which detects about the case where the grade of the curvature of the board 3 is large exceeding a certain limit is shown. Here, as in the case of the description of the second embodiment, the figure shows a case where the polarizing plate 3b that has warped in the direction in which the tip protrudes from the holding surface of the film member holding stage 4 is treated as an example. Yes. Note that the degree of warping of the polarizing plate 3b is set to such a degree that the polarizing plate attaching apparatus 10a according to the second embodiment can perform the attaching process without any problem.

  As a difference between the polarizing plate sticking apparatus 10b of this modification and the polarizing plate sticking apparatus 10a of the second embodiment, specifically, a configuration for performing a detection function for detecting a case where the polarizing plate sticking apparatus 10b is larger than a certain limit described above. In addition to the polarizing plate tip position measuring sensor 6c provided in the polarizing plate pasting apparatus 10a, a polarizing plate tip position measuring sensor 6d is disposed at a position detected when the polarizing plate 3 having a larger degree of warpage is processed. ing. The position at which the polarizing plate tip position measuring sensor 6d is disposed is a lower limit value of a warp range in which a problem-free sticking process cannot be performed by the polarizing plate sticking apparatus 10a according to the second embodiment, that is, a predetermined threshold value. It should be placed in.

  Further, as shown in the drawing, the polarizing plate attaching apparatus 10b includes an alarm mechanism 6e that issues an alarm when the polarizing plate 3 that is difficult to attach is detected by the polarizing plate tip position measuring sensor 6d. Specifically, the alarm mechanism 6e may be a specific alarm sound or a specific alarm display on a control screen or the like of the control mechanism because it is only necessary to know that the alarm mechanism 6e has been detected. In addition, as an operation of the polarizing plate pasting apparatus 10b when the polarizing plate 3 that is difficult to be pasted is detected by the polarizing plate tip position measuring sensor 6d, an alarm is generated by the alarm mechanism 6e, and it is evaluated that the pasting is difficult. The affixing operation by the affixing roller 5 of the polarizing plate 3 is stopped, the film member holding stage 4 is operated as appropriate, and a disposal process for discarding the polarizing plate 3 in a disposal place prepared at a predetermined position is performed. A new polarizing plate 3 is received from the film member supply mechanism, and a pasting operation starting from detection of a predetermined warpage state is started again.

  In addition, in the polarizing plate pasting apparatus 10b described with reference to FIG. 11A, a polarizing plate tip position measuring sensor 6d is separately provided as a configuration that performs a detection function of detecting when the polarizing plate 3 is larger than a certain limit. As described in the second embodiment, the polarizing plate tip position measurement sensor 6c is used to evaluate the degree of warping (the degree of protrusion) protruding from the holding surface of the film member holding stage 4 as illustrated in the second embodiment. In this case, the measured degree of warpage of the polarizing plate 3 based on a predetermined threshold value for the degree of warpage that makes pasting difficult based on the information on the degree of protrusion obtained by the measurement. What is necessary is just to detect whether it is larger than a certain limit.

  Subsequently, FIG. 11B adds a detection function for detecting the case where the degree of warping of the polarizing plate 3 is larger than a certain limit to the configuration of the second embodiment, and further, the polarizing plate. In the case where the degree of warpage 3 is larger than a certain limit, the polarizing plate attaching apparatus 10c to which a function of changing the warpage state is added is shown. Here, similarly to FIG. 11A, the drawing shows a case where the polarizing plate 3 b that has warped in the direction in which the tip protrudes from the holding surface of the film member holding stage 4 is processed as an example.

  The difference between the polarizing plate pasting apparatus 10a of the second embodiment of the polarizing plate pasting apparatus 10c of this modification is that the polarizing plate has a large degree of warpage above the threshold, as in the polarizing plate pasting apparatus 10b. In addition to disposing the polarizing plate tip position measuring sensor 6d at the position detected when processing 3, as a specific configuration having a function of performing a process of changing the warping state, as shown in the figure, for example, a film The member holding stage 4 is provided with a heater mechanism 4 d capable of heating the film member holding stage 4 and the held polarizing plate 3.

  The entire film member holding stage 4 is heated by the heater mechanism 4d, and the held polarizing plate 3 is heated. Moreover, as temperature to heat, it is preferable to set it as the temperature range which does not affect the optical characteristic of the polarizing plate 3 processed, and an adhesion layer. Depending on the temperature dependency of the warping of the polarizing plate 3 or the optical film member to be processed, a cooling mechanism may be provided as a mechanism for changing the warping state of the polarizing plate 3, or a heating mechanism. A certain heater mechanism and cooling mechanism may be provided and used appropriately.

  Further, as the operation of the polarizing plate pasting apparatus 10c when the polarizing plate 3 difficult to be pasted is detected by the polarizing plate tip position measuring sensor 6d, the pasting roller for the polarizing plate 3 evaluated as being difficult to stick. 5 is stopped, the heating operation by the heater mechanism 4d is started, the heating operation is performed for a predetermined time, and then the polarizing plate 3 whose warpage has changed due to the heating is again applied to the predetermined polarizing plate 3. Detects the warpage state of. As a result of this re-evaluation, when the polarizing plate tip position measuring sensor 6d is no longer detected, that is, when the polarizing plate 3 is evaluated as a polarizing plate 3 that can be pasted, the predetermined polarizing plate 3 continues. The pasting operation may be started. Further, when the re-evaluation does not change to a warpable state that can be attached, a disposal process for discarding the polarizing plate 3 is appropriately performed as in the polarizing plate attaching apparatus 10b, and a new polarized light is obtained from the film member supply mechanism. It is only necessary to receive the plate 3 and start the pasting operation starting from detection of a predetermined warpage state again.

  Also in the polarizing plate pasting apparatus 10c of the modified example described above, the basic configuration is the same as the polarizing plate pasting apparatus 10 in the first embodiment and the polarizing plate pasting apparatus 10b in the second embodiment. The polarizing plate 3 is held based on the measurement result about the warping state of the polarizing plate 3 obtained by the measurement mechanism for measuring and evaluating the warping state of the polarizing plate 3 performed before the attaching operation by the attaching roller 5. The film member holding stage 4 is determined by optimizing the tilt angle, and the film member holding stage 4 holding the polarizing plate 3 is automatically tilted and arranged at the determined tilt angle. Be started. Therefore, including the polarizing plate 3 that has warped, the occurrence of bubbles, wrinkles, unevenness, etc. can be prevented, and the polarizing plate 3 can be satisfactorily attached to the liquid crystal cell 1. You can get a good effect.

  In the polarizing plate pasting apparatus 10c of the modified example described above, the heating operation of the heater mechanism 4d capable of heating the film member holding stage 4 and the held polarizing plate 3 is difficult to stick. Although the example performed only when the plate 3 is detected has been described, as the temperature dependence of the warpage of the polarizing plate 3 to be processed, it is preliminarily that the degree of warpage tends to be reduced by heating from room temperature. In the case where it is known, the specification may be such that the warming operation is always performed by the heater mechanism 4d, which is preferable in that the increase in processing tact is eliminated as compared with the case where the warming operation is started after the measurement of the warped state. In addition, the specification for always performing the heating operation by the heater mechanism 4d may be applied not only to the case of the second embodiment but also to the first embodiment.

  Further, like the polarizing plate attaching apparatus 10c, the heating operation of the heater mechanism 4d is performed only when the polarizing plate 3 that is difficult to attach is detected, that is, the state of warping (direction and degree). ), The polarizing plate 3 that can be pasted without any problem by the polarizing plate pasting apparatus 10a according to the second embodiment is not heated by the heater mechanism 4d. It does not affect the polarizing plate 3 in a warp state that can be attached. That is, the heating operation does not deteriorate the warp state of the polarizing plate 3 that can be pasted, and conversely does not make the pasting difficult.

  Further, in the polarizing plate pasting apparatus 10c of the modified example, the arrangement of the alarm mechanism 6e is omitted. Thus, a heating operation by the heater mechanism 4d may be performed, and an alarm may be generated when the polarizing plate 3 that is difficult to be attached is detected even after the heating operation.

  Further, the configuration of the polarizing plate pasting apparatus 10b or the polarizing plate pasting apparatus 10c of the modified example described above has been described as a modified example of the second embodiment, but it is applied to a relatively wide range of warping. Even in the case of attachable Embodiment 1, it may be applied as a modification of Embodiment 1 as corresponding to the polarizing plate 3 that is difficult to attach.

  In the first and second embodiments described above or modifications thereof, a transmissive optical sensor is used as a method for measuring the warpage state (direction of warpage and degree of warpage) of the polarizing plate 3 to be attached. Although the case where it used was demonstrated, for example, about the front-end | tip part of the polarizing plate 3, the amount of curvature (the direction of curvature, the extent of curvature) was evaluated and measured by taking an image from the side surface side and performing image analysis. May be. Although the optimum tilt angle of the film member holding stage 4 for bonding is not directly obtained as in the bonding apparatus and the bonding method of the first embodiment, the amount of warping (the direction of warping and the degree of warping) is not obtained. The accuracy in evaluating and measuring is superior to the case of using a transmissive optical sensor, so that it is effective when applied as a modification of the second embodiment.

Embodiment 3.
Subsequently, Embodiment 3 which is an embodiment when the present invention is applied to a liquid crystal display device and a manufacturing method thereof will be described. 12 and 13 are schematic views of a liquid crystal display panel constituting the liquid crystal display device according to Embodiment 3 of the present invention. Hereinafter, the configuration of this liquid crystal display panel. This will be described with reference to FIGS. 12 is a plan view showing the entire liquid crystal display panel, and FIG. 13 is a cross-sectional view taken along a cross-sectional line AB in FIG.

  In the third embodiment, a case where a liquid crystal display device is manufactured using the polarizing plate bonding apparatus 10 and the polarizing plate bonding method of the first embodiment will be described as an example. In addition, here, as an example, the present invention is applied to a horizontal electric field type liquid crystal display panel operated using a TFT (Thin Film Transistor) as a switching element, particularly to a liquid crystal display panel using an FFS (Fringe Field Switching) type. The case will be described.

  As shown in FIGS. 12 and 13, the liquid crystal display panel 100 is arranged to be opposed to and aligned with a TFT substrate 110 having a TFT as a switching element, and to display an image. A color filter substrate 120, which is a counter substrate having a display area 200, and a seal material 130 that is disposed so as to surround the area corresponding to the display area 200 and seals a gap between the color filter substrate 120 and the TFT substrate 110 are provided. ing. Further, between the TFT substrate 110 and the color filter substrate 120, a large number of columnar spacers (not shown) that form and hold a gap of a predetermined distance between the substrates are arranged in the display region 200. The liquid crystal layer 140 is sandwiched between at least the region corresponding to the display region 200 in the gap between the color filter substrate 120 and the TFT substrate 110 which is sealed by the sealant 130 and held by the columnar spacers. The sealing material 130 is formed in a frame area 190 disposed outside the area corresponding to the display area 200. Further, the outer shapes of the TFT substrate 110 and the color filter substrate 120 are both rectangular, and the outer shape of the TFT substrate 110 is larger than the outer shape of the color filter substrate 120 and partly from the outer end surface of the color filter substrate 120. It has the protrusion part which protrudes, and is arranged in piles.

  The frame region 190 used here surrounds the display region 200 positioned outside the display region 200 in the region on the TFT substrate 110, the color filter substrate 120, or between the substrates of the liquid crystal display panel 100. A frame-shaped region, that is, a region other than the display region 200, and the display region 200 is also a region sandwiched between the TFT substrate 110, the color filter substrate 120, or both substrates of the liquid crystal display panel 100. In this specification, all are used in the same meaning.

  The color filter substrate 120 described above includes an alignment film (not shown) for aligning liquid crystal in a region corresponding to the display region 200 on one surface of the glass substrate 121 as a first transparent substrate, and a lower portion of the alignment film. The light-shielding layer 125 is provided to shield between the color filter 124 and the color filter 124 provided, or to shield the frame region 190 disposed outside the region corresponding to the display region 200. As the color filter 124, a color material layer in which a pigment or the like is dispersed in a resin can be selected. The color filter 124 functions as a filter that selectively transmits light in a specific wavelength range such as red, green, and blue. The color material layers are arranged regularly. As the light shielding layer 125, a metal material using chromium oxide or the like, a resin material in which black particles are dispersed in a resin, or the like can be selected. Note that an overcoat layer made of a transparent resin film may be provided below the alignment film so as to cover the color filter 124 and the light shielding layer 125.

  In addition, the color filter substrate 120 includes an antistatic transparent conductive layer 131 connected to the ground on the other surface of the glass substrate 121. The static-preventing transparent conductive layer 131 covers at least the display region 200 of the glass substrate 121 and is provided as an effective means for preventing charging due to static electricity or a display defect due to an external electric field in a horizontal electric field type liquid crystal display panel. .

  On the other hand, the above-described TFT substrate 110 is an alignment film (not shown) that aligns liquid crystal in a region corresponding to the display region 200 on the surface of the glass substrate 111 that is the second transparent substrate on the side facing the color filter substrate 120. ), A pixel electrode 112 and a counter electrode, which are a pair of electrodes that are provided below the alignment film and generate an electric field in a direction parallel to the substrate surface of the TFT substrate 110 or the color filter substrate 120 and apply a voltage for driving the liquid crystal. 113, a TFT 114 which is a switching element for writing a voltage to the pixel electrode 112 which is one of the pair of electrodes, an insulating film 115 which covers the TFT 114, and a plurality of gate wirings 116g and source wirings which are wirings for supplying signals to the TFT 114 116s, a gate electrode (not shown) connected to these wirings and constituting the TFT 114, and a source electrode And a like scan-drain electrodes (not shown).

  As for the pixel electrode 112 and the counter electrode 113 which are a pair of electrodes for applying a voltage for driving the liquid crystal, in the first embodiment, the pixel electrode 112 which is one of the electrodes is formed by a flat transparent conductive film pattern. The counter electrode 113, which is the other electrode, is composed of a transparent conductive film pattern having a comb-like shape or a plurality of parallel slit-like openings, and is disposed on the pixel electrode 112 with an insulating layer interposed therebetween. The In addition, the above configuration is not essential, and the pixel electrode 112 and the counter electrode 113 have a shape having a comb-teeth shape or a plurality of slit-shaped openings arranged in parallel, with the vertical relationship of the shape and arrangement reversed. Arranged in a layer above the counter electrode 113, the counter electrode 113 is arranged in a lower layer than the pixel electrode 112 as a flat plate shape, and the TFT 114 is connected to the pixel electrode 112 having a comb-tooth shape or a pattern having a plurality of slit-shaped openings arranged in parallel. However, it may be configured to apply a voltage. In addition, although illustration description of the specific planar pattern shape of the pixel electrode 112 and the counter electrode 113 is abbreviate | omitted, if the plane pattern shape of the pixel electrode and counter electrode used for the liquid crystal display panel using a well-known FFS system is employ | adopted. good.

  In addition, the insulating film 115 which is an insulating film constituting the TFT substrate 110, or the insulating film formed between the pixel electrode 112 and the counter electrode 113 is a single layer transparent insulating film or a plurality of transparent insulating films. It is composed of a laminated film. In addition, as schematically shown in FIG. 12, a plurality of gate lines 116g and source lines 116s formed in the display region 200 are arranged in parallel, and the plurality of gate lines are arranged. 116g and the source wiring 116s are arranged so as to intersect each other. Further, the pixel electrode 112 and the TFT 114, and further the gate electrode and the source / drain electrode constituting the TFT 114 are arranged in an array corresponding to the pixel region surrounded by the intersection of the plurality of gate wirings 116g and the source wirings 116s. Has been. In addition, the same number of common wirings 113L that supply a common potential to the counter electrode 113 are arranged in parallel to the gate wirings 116g and connected to the counter electrode 113 in each pixel region, and the potential of the counter electrode 113 in each pixel region is set to be equal. All are shared with a common potential.

  Further, a signal supplied to the TFT 114 is received from the outside on the surface of the frame region 190 on the TFT substrate 110, particularly on the surface on the side where the color filter substrate 120 is disposed in the protruding portion that partially protrudes from the end surface of the color filter substrate 120. A signal terminal 118 is provided. The signal terminal 118 is shown as an integral configuration in the figure, but in detail, a plurality of rectangular pads having a longitudinal direction in the X direction in the figure separated in correspondence with a plurality of signals in the Y direction in the figure. It has an arranged configuration.

  Further, each pad of the signal terminal 118 is equipped with a control IC (Integrated Circuit) chip that generates a control signal for controlling the driving IC through an FFC (Flexible Flat Cable) 136 serving as a connection wiring. The control board 135 is connected. Further, a control signal from the control board 135 is input to the input side of the drive IC chip 134 attached to the protruding portion via the signal terminal 118, and an output signal output from the output side of the drive IC chip 134 is displayed. The signal is supplied to the TFT 114 in the display area 200 through a large number of signal lead lines (not shown) drawn from the area 200.

  Further, a polarizing plate 132 a is provided on the antistatic transparent conductive layer 131 provided on the outer surface with respect to the liquid crystal layer 140 of the color filter substrate 120. Further, a polarizing plate 132 b is provided on the outer surface of the liquid crystal layer 140 of the TFT substrate 110. The polarizing plate 132a and the polarizing plate 132b are disposed so as to cover at least the display region 200 of the color filter substrate 120 and the TFT substrate 110, respectively, and are fixed by being attached via an adhesive layer (not shown). In addition, although the polarizing plate 132a and the polarizing plate 132b are illustrated as a single plate, a protective layer (TAC layer), a polarizing plate (polarizing film layer), a retardation plate, a viewing angle correction (wide view) film, or the like. It is configured as a laminated structure in which

  Further, the antistatic transparent conductive layer 131 formed on the surface of the color filter substrate 120 is grounded. Here, for example, the ground pad 117 is provided on the protruding portion of the TFT substrate 110, and the antistatic transparent conductive layer 131 and the ground pad 117 are connected via the conductive tape 133. Note that most of the transparent conductive layer 131 for preventing static electricity is covered by the polarizing plate 132a, but an exposed portion that is not covered by the polarizing plate 132a is formed at the end of the color filter substrate 120. . A conductive tape 133 is attached to an exposed portion of the static electricity preventing transparent conductive layer 131 and connected to the static electricity preventing transparent conductive layer 131. Further, since the ground pad 117 is grounded via the signal terminal 118 and the FFC 136 in sequence, the static electricity preventing transparent conductive layer 131 is grounded via these paths. In addition, as the conductive tape 133, what apply | coated the conductive adhesive to the base material which consists of metal foils, such as Al foil and Cu foil, can be used, and a general commercially available conductive tape can be utilized.

  As described above, the liquid crystal display panel 100 of the third embodiment is configured. Further, a backlight unit (not shown) serving as a light source facing the substrate surface of the TFT substrate 110 is provided on the opposite side of the liquid crystal display panel 100 from the display surface formed in the display region 200 of the color filter substrate 120. These are arranged through an optical sheet (not shown) having a function of adjusting light from the backlight unit, and are housed in a casing (not shown) in which the display surface portion of the display area 200 is opened together with these members. Thus, the liquid crystal display device of the third embodiment is configured.

  The liquid crystal display device according to the third embodiment, whose configuration has been described above, operates as follows. For example, a control signal is input from the control substrate 135, the driving IC chip 134 operates, and the signal is transmitted to the pixel region via the wiring in the display region 200. As a result, an electric field in a direction parallel to the substrate surface of the TFT substrate 110 or the color filter substrate 120 between the pixel electrode 112 and the common electrode 113 arranged in each pixel region (more specifically, in the FFS method, parallel to the electric field in the parallel direction). A predetermined driving voltage for generating a parallel electric field is applied, and the direction of liquid crystal molecules changes according to the driving voltage. The light emitted from the backlight unit is transmitted or blocked to the viewer side through the TFT substrate 110, the liquid crystal layer 140, and the color filter substrate 120, whereby the display region 200 on the color filter substrate 120 side of the liquid crystal display panel 100. An image or the like is displayed on the display surface formed on the screen.

  Next, a method for manufacturing the liquid crystal display device according to the third embodiment will be described. Here, the manufacturing process of the liquid crystal display panel, which is characteristic in the present invention, will be outlined in order according to the flowchart shown in FIG.

  First, in the substrate preparation step, a mother TFT substrate that takes out the TFT substrate 110 before being bonded together and a mother color filter substrate that is a mother substrate from which the color filter substrate 120 is taken out are prepared. A predetermined number of TFT substrates 110 or color filter substrates 120 having the same configuration are arranged and formed on each mother substrate. The mother TFT substrate having the configuration of the TFT substrate 110 and the mother color filter substrate having the configuration of the color filter substrate 120 can be obtained if the detailed configuration of the TFT substrate 110 is known as described with reference to FIGS. It is possible to manufacture a TFT substrate and a color filter substrate for a known FFS mode liquid crystal display device by appropriately combining a method for producing a TFT substrate and a color filter substrate, and repeating a known film forming step and patterning step. Therefore, a more specific description of the manufacturing method of the mother TFT substrate and the mother color filter substrate itself is omitted.

  Subsequently, a substrate cleaning process for cleaning the substrate is performed on the mother TFT substrate on which the TFT substrate 110 prepared as described above is formed (S1). Next, in the alignment film material application step, an alignment film material is applied and formed on one surface of the mother TFT substrate (S2). In this step, for example, an alignment film material made of an organic film is applied by a printing method, and is baked and dried by a hot plate or the like. Thereafter, the alignment film material is rubbed in a rubbing process, and the alignment film material surface is subjected to alignment treatment to form an alignment film on the TFT substrate 110 side (S3). Similarly to S1 to S3, for the mother color filter substrate on which the color filter substrate 120 is formed, the alignment film on the color filter substrate 120 side is formed by performing washing, applying an alignment film material, and rubbing.

  Subsequently, in the sealing material application process, the screen printing apparatus uses the sealing material as a printing paste to apply the sealing material to one surface of the mother TFT substrate or the mother color filter substrate to form a pattern that surrounds the display region 200. The sealing material 130 is formed (S4). Then, in the liquid crystal dropping step, a large number of liquid crystals in the form of droplets are dropped on one surface of the mother TFT substrate or the mother color filter substrate in a region surrounded by the sealing material 130 (S5). Specifically, for example, with respect to the color filter substrate 120 of the mother color filter substrate, a predetermined amount of the liquid crystal layer 140 is formed as a whole by forming a large number of droplet-like liquid crystals in a region surrounded by the sealing material 130. Dripping into. Further, here, since the liquid crystal is filled by using a so-called drop injection method and the liquid crystal layer 140 is formed as an example, the liquid crystal layer 140 is formed in this way. However, when using the so-called vacuum injection method, The material 130 does not have a completely closed shape, but a liquid crystal injection port that is partially opened is formed. In addition, since the liquid crystal is injected from the liquid crystal injection port after being bonded, the liquid crystal forming process described above is omitted.

  Subsequently, in the bonding step, the mother TFT substrate and the mother color filter substrate are bonded together to form a cell substrate (S6). Specifically, the mother TFT substrate and the mother color filter substrate are brought close to each other in a state where the liquid crystal in the form of droplets is placed, and are aligned and overlapped. As a result, the liquid crystal formed in the form of droplets is sandwiched between the mother TFT substrate and the mother color filter substrate and uniformly spreads and becomes a state of the integrated liquid crystal layer 140, and each of the liquid crystal layers 140 between the mother TFT substrate and the mother color filter substrate is obtained. The volume surrounded by the sealing material 130 is filled.

  Further, in the seal curing step, the seal material 130 is completely cured in a state where the mother TFT substrate and the mother color filter substrate are bonded together (S7). This step is performed, for example, by applying heat according to the material of the sealing material 130 or by irradiating ultraviolet rays. In the third embodiment, curing is performed by a method of irradiating with ultraviolet rays, which is compatible with the dropping injection method. By this process, the mother TFT substrate and the mother color filter substrate are fixed in the aligned positional relationship. Further, when the substrate is thinned to reduce the weight of the liquid crystal display panel, it is preferable to perform a thinning process by chemical solution or mechanical polishing in the bonded state.

  Next, in the cell dividing step, the cell substrate is divided into a large number of individual cells (S8). In the case of using the so-called vacuum injection method, a liquid crystal injection port partially opened in the sealing material 130 as described above is formed, and in the liquid crystal injection step performed after the cell dividing step, Liquid crystal is injected into the individual cells from the liquid crystal injection port. In this step, for example, the liquid crystal layer 140 is formed by filling the liquid crystal by vacuum injection from the liquid crystal injection port. Further, in the sealing step, the liquid crystal inlet is sealed. This step is performed, for example, by sealing with a photocurable resin and irradiating with light.

  After being divided into individual liquid crystal display panel shapes in this way, in the polarizing plate attaching step, the polarizing plate 132a and the polarizing plate as optical film members on the respective surfaces of the color filter substrate 120 and the TFT substrate 110 of the individual liquid crystal cell. The plate 132b is pasted (S9). In particular, with respect to the polarizing plate attaching step (S9) performed here, specifically, the polarizing plate attaching device according to any one of the first and second embodiments described above or their modifications. And a polarizing plate sticking process is performed using the sticking method. Therefore, as described in the first and second embodiments or the modifications thereof, the polarizing plate 132a and the polarizing plate 132b can be optimally attached according to the warpage state. That is, mixing of bubbles, wrinkles, unevenness, and the like can be prevented and a good paste can be obtained. Alternatively, it can be pasted with high pasting position accuracy.

Subsequently, in the control board mounting step, the control board 135 is mounted (S10). This process
The FFC 136 attached with the control substrate 135 is attached to the signal terminal 118 so as to be conductive, and a conductive tape 133 is attached over the color filter substrate 120 to the TFT substrate 110 to prevent static electricity on the surface of the color filter substrate 120. The transparent conductive layer 131 and the ground pad 117 formed on the surface of the TFT substrate 110 are electrically connected. The liquid crystal display panel 100 is completed through the above steps.

  Finally, a backlight unit is disposed opposite to the liquid crystal display panel 100 via an optical sheet, and the liquid crystal display panel 100 is housed in a housing in which a portion outside the color filter substrate 120 in the display area 200 serving as a display surface is opened. Thus, the liquid crystal display device of the third embodiment is completed.

  As described above, in the liquid crystal display device according to the third embodiment and the method for manufacturing the same, the polarizing plate 132a and the polarizing plate 132b are particularly attached to the polarizing plate according to any one of the first and second embodiments or the modifications thereof. The polarizing plate pasting process is performed using the apparatus and the pasting method, and particularly in the peripheral part of the polarizing plate 132a and the polarizing plate 132b that are first brought into contact during the pasting process of the polarizing plate 132a and the polarizing plate 132b. In addition, it does not cause white turbidity or light scattering due to the mixing of bubbles, and further impairs the visibility of the display image due to generation of wrinkles, unevenness, etc. over the entire polarizing plate 132a and polarizing plate 132b. In the completed liquid crystal display device, display quality is not impaired. In addition, it is possible to manufacture a liquid crystal display device at a low cost because neither the above-described defects occur nor the manufacturing yield decreases nor the substantial processing tact due to the need for rework processing does not decrease significantly. Is possible.

  Further, in the first to third embodiments described above or the modifications thereof, as an example of the optical film member attaching device, the attaching method, and the display device manufacturing method, the optical film member may be a liquid crystal display. The polarizing plate attaching device and the attaching method for attaching the polarizing plate used for the panel, or the case where it is applied to the manufacturing method of the liquid crystal display device has been described, but as other optical film members, on at least one surface The same operation and effect can be obtained if the attaching device and the attaching method are used to attach an optical film member having an optical function in which an adhesive layer is formed. In addition to the liquid crystal display device, the optical film member can be applied to a display panel in a flat panel display device such as a plasma display or an organic EL display, and is suitable for manufacturing these display devices. It is possible to obtain the same effect as when applied to a method of manufacturing a liquid crystal display device.

1 liquid crystal cell, 2 panel holding stage,
3, 3a, 3b, 3c, 132a, 132b polarizing plate,
4 Film member holding stage 4, 4a Tip relief, 4b Suction port,
4c rotating mechanism, 4d heater mechanism,
5 sticking roller, 6 polarizing plate tip position measurement sensor mechanism,
6a, 6b, 6c, 6d Polarizing plate tip position measuring sensor, 6e alarm mechanism,
10, 10a, 10b, 10c polarizing plate pasting device,
100 liquid crystal display panel, 110 TFT substrate, 120 color filter substrate,
111, 121 glass substrate, 112 pixel electrode, 113 counter electrode,
113L common wiring, 114 TFT, 115 insulating film,
116g gate wiring, 116s source wiring,
117 ground pad, 118 signal terminal,
124 color filters, 125 light shielding layers,
126a, 126b protective sheet layer,
130 sealing material, 131 antistatic transparent conductive layer,
133 conductive tape, 134 driving IC chip, 135 control board,
136 FFC, 140 liquid crystal layer, 190 frame area, 200 display area.

Claims (12)

In an optical film member attaching apparatus for attaching an optical film member having an adhesive layer to a display panel,
A panel holding stage for holding the display panel;
A film member holding stage for holding the optical film member;
Relative movement is possible along the surface of the display panel held by the panel holding stage, and an application roller for attaching the optical film;
A measuring mechanism for measuring the warping state of the polarizing plate held by the film member holding stage before the attaching operation by the attaching roller;
The film member holding stage holding the polarizing plate with respect to the panel holding stage holding the display panel is determined based on the measurement result about the warpage state of the polarizing plate obtained by the measurement mechanism. An optical film member pasting apparatus, wherein the pasting operation by the pasting roller is started in a state of being tilted at an inclination angle.   The measurement result about the warpage state of the polarizing plate obtained by the measuring mechanism is determined when the warping state in which the front end portion of the polarizing plate protrudes from the holding surface of the film member holding stage is generated. 2. The optical film member according to claim 1, wherein the inclination angle is set to be smaller than the inclination angle determined when the measurement result is a warp state in which no warpage occurs. Pasting device.   The measurement result regarding the warpage state of the polarizing plate obtained by the measurement mechanism is determined when the tip portion of the polarizing plate is in a warpage state in which the warp in the direction of retreating from the holding surface of the film member holding stage is generated. The said inclination | tilt angle is set to an angle larger than the said inclination | tilt angle determined when the said measurement result is the curvature state which has not generate | occur | produced the curvature. Optical film member pasting device.   According to the tilt angle, the position of the front end of the polarizing plate held on the film member holding stage is corrected for a shift with respect to a predetermined sticking start position on the display panel held on the panel holding stage. The apparatus for attaching an optical film member according to any one of claims 1 to 3, wherein:   The said measurement mechanism is equipped with the position measurement sensor for measuring about the position of the front-end | tip part of the said polarizing plate in the state which inclined the said film member holding | maintenance stage with which the said polarizing plate was hold | maintained. The optical film member affixing device according to claim 4.   The measurement mechanism includes a detection function for detecting a case where the degree of warpage of the polarizing plate obtained as the measurement result is larger than a predetermined threshold value. The optical film member attaching apparatus according to any one of claims 5 to 6.   The optical film member pasting apparatus according to claim 6, further comprising an alarm function that issues an alarm when the detection function detects a case in which the predetermined threshold value is exceeded.   The optical device according to claim 6 or 7, wherein when the detection function detects a case where the predetermined threshold value is exceeded and the detection result is larger, the attaching operation of the polarizing plate is stopped. Film member pasting device.   The optical film member attaching apparatus according to any one of claims 1 to 8, wherein the film member holding stage has a function of performing a process of changing a warping state with respect to the polarizing plate.   The film member holding stage has a function of performing a process of changing a warp state with respect to the polarizing plate, and the process of changing the warp state is detected by the detection function when it is larger than the predetermined threshold value. The apparatus for attaching an optical film member according to any one of claims 6 to 8, which is performed only when the optical film member is applied. In the attaching method of the optical film member for attaching the optical film member having the adhesive layer to the display panel,
Holding the display panel by a panel holding stage;
A step of holding the optical film member by a film member holding stage;
Pasting the optical film by relatively moving a pasting roller along the surface of the display panel held by the panel holding stage;
A step of measuring a warpage state of the polarizing plate held on the film member holding stage, which is performed before an attaching operation by the attaching roller, and the film member holding stage on which the polarizing plate is held as the display panel. An optical film member comprising: a step of inclining an inclination angle determined based on a measurement result of a warp state of the polarizing plate obtained by the measurement mechanism with respect to a panel holding stage in which the optical film is held. How to paste. It has the process of affixing the said optical film member using the affixing device of the optical film member in any one of Claims 1-10, or the affixing method of the optical film member of Claim 11. A manufacturing method of a display device characterized by the above.

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