JP2007272103A - Method for manufacturing display panel, and film sticking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a display panel, and a film sticking device that can decrease problems caused by glass waste. <P>SOLUTION: In a film sticking stage of sticking a film on a display panel 1 with a glass substrate parted in a parting stage for the display panel 1, substrate processing is performed by making a glass waste inducing member 22 abut against an edge portion of a surface parted in the parting stage before a surface of the display panel 1 where the film is to be stuck is cleaned. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a display panel in which a film is attached to the surface of a display panel having two glass substrates, and an apparatus for attaching the film.

  The basic manufacturing process of a liquid crystal display panel in which a liquid crystal is sealed between two glass substrates and a polarizing film is pasted on the surface of the glass substrate is roughly divided into a patterning process, an alignment process process, and a substrate bonding process. -It is comprised from five manufacturing processes, a panel parting process, a liquid crystal injection | pouring / sealing process, and a polarizing film sticking process (for example, refer patent document 1).

  Here, the problem in the polarizing film sticking process of the manufacturing method of the conventional liquid crystal display panel is demonstrated easily.

  The polarizing film attaching step is a step of attaching a polarizing film to the front and back surfaces of the individual liquid crystal display panel divided from a stick substrate in which a plurality of individual liquid crystal display panels are arranged in one direction.

  In this polarizing film sticking step, a polarizing film sticking apparatus 1 as shown in FIGS. 4 to 7 is conventionally used.

  As shown in FIG. 4, in the polarizing film sticking apparatus 1, several transport rollers 32 are arranged at approximately equal intervals in the transport direction of the liquid crystal display panel 1 between two support walls 31 arranged in parallel. And a transport device 30 capable of transporting the liquid crystal display panel 1 placed on the upper surface thereof by driving a drive device such as a motor (not shown) to rotate each transport roller 32 at a predetermined rotational speed. Yes.

  A transport path (hereinafter simply referred to as a transport path) of the liquid crystal display panel 1 of the transport device 30 is a first pasting work position in which a polarizing film is pasted on the upper surface (one surface) of the transported liquid crystal display panel 1 in order from the upstream side. The second pasting operation of pasting a polarizing film on the front / back surface changing position (not shown) for returning the front and back surfaces of the liquid crystal display panel 1 being transported, and the upper surface (the other one surface) of the liquid crystal display panel 1 being transported by facing the front and back surfaces Position (not shown). In the present embodiment, the transport device 30 is configured such that the transport roller 32 disposed on the upstream side and the transport roller 32 disposed on the downstream side are rotated by different driving devices with the front / back conversion position as a boundary. The driving is started and stopped. The configuration of the first application work position is the same as that of the second application work position, and the configuration of the first application work position will be representatively described below.

  As shown in FIG. 5, a first end of the liquid crystal display panel 1 that is transported in the transport direction of the liquid crystal display panel 1 is detected below the transport path of the first pasting work position in order from the upstream side in the transport direction. Three sensors S including one sensor S1 to third sensor S3 are arranged.

  The liquid crystal display panel can be moved up and down immediately downstream of the third sensor S3, with the tip portion positioned in the transport path at the uppermost position, and the tip portion of the transported liquid crystal display panel 1 being brought into contact therewith. A stopper 35 that can stop 1 at a predetermined position is provided. The stopper 35 uses the second sensor S2 to detect the leading end of the liquid crystal display panel 1 as an opportunity to start the ascending operation, and stops the rotational driving of the conveying roller 32 of the conveying device 30 as an opportunity to start the descending operation. Is controlled.

  In addition, while the main switch is in the ON state, the transport device 30 uses the detection of the tip of the liquid crystal display panel 1 by the third sensor S3 as an opportunity to stop the transport, and stops driving the pasting head device 37, which will be described later. That is, it is controlled so that the completion of the application of the polarizing film is triggered by the start of re-driving.

  Further, as shown in FIG. 6, the first pasting work position can be moved up and down and can be moved toward and away from the side of the liquid crystal display panel 1. From the both sides to the side of the liquid crystal display panel 1 to be transported A guide member 39 is provided for bringing the liquid crystal display panel 1 into contact with the liquid crystal display panel 1 at a predetermined position. The guide member 39 uses the detection of the tip of the liquid crystal display panel 1 by the third sensor S3 as an opportunity to start an alignment operation consisting of a combination of ascending and approaching operations. It is controlled so that the completion of the application of the polarizing film is triggered by the start of the separation and descending operations.

  Further, a pasting head device 37 provided with a pasting roller, a polarizing film adsorption plate and the like (not shown) is disposed immediately above the stop position of the liquid crystal display panel 1 at the first pasting operation position.

  Further, as shown in FIG. 7, the part immediately before the stop position can be moved up and down while supporting a roll around which the adhesive sheet is wound so as to be slidably rotatable. A cleaning roller 42 is disposed in surface contact with the upper surface of the display panel 1 so that the surface to which the polarizing film is attached can be cleaned. The cleaning roller 42 is triggered by the detection of the tip of the liquid crystal display panel 1 by the first sensor S1 disposed on the upstream side of the cleaning roller 42, and the tip of the liquid crystal display panel 1 by the third sensor S3 is triggered. Control is performed so that the detection of the part is triggered by the start of the ascending operation.

  When applying a polarizing film to each liquid crystal display panel 1 using the polarizing film sticking device 1 having such a configuration, first, the main switch of the transport device 30 is turned on to set the transport roller 32 to a predetermined value. The liquid crystal display panels 1 are placed one by one on the top surface of the liquid crystal display panel 1 at a rotational speed.

  When the liquid crystal display panel 1 placed on the transport device 30 is transported to the first affixing work position and the first sensor S1 detects the tip of the liquid crystal display panel 1, the cleaning roller 42 is lowered. The pressure-sensitive adhesive sheet is brought into surface contact with the upper surface of the liquid crystal display panel 1 being conveyed. Then, by rotating following the conveyance of the liquid crystal display panel 1, dust adhering to the upper surface, which is the attaching surface of the polarizing film, is adhered to the adhesive sheet, and the upper surface is cleaned.

  Thereafter, when the second sensor detects the leading end of the liquid crystal display panel 1 that is transported in a state where dust is removed by the adhesive sheet, the stopper 35 starts to move upward, and the leading end in the transport path at the topmost position. Position to stop.

  Further, when the liquid crystal display panel 1 is further transported, the liquid crystal display panel 1 makes its tip end abut against the stopper 35. At this time, when the third sensor S3 detects the tip of the liquid crystal display panel 1, the transport roller 32 of the transport device 30 stops rotating and the stopper 35 starts to descend. At the same time, after the guide member 39 is lifted, a series of operations close to the transported liquid crystal display panel 1 is started, and the liquid crystal display panel 1 is brought into contact with the side of the liquid crystal display panel 1 from both sides. Align to a predetermined position.

  Further, when the third sensor detects the tip of the liquid crystal display panel 1, the cleaning roller 42 is also raised.

  In this state, the operation of the sticking head device 37 is started, and the polarizing film sucked by the polarizing film suction plate is stuck on the upper surface of the liquid crystal display panel 1 aligned with the first sticking work position.

  When the polarizing film is pasted by the pasting head device 37, the guide member 39 starts to move down after the guide member 39 is separated from the liquid crystal display panel 1, and the rotation driving of the transport roller 32 is resumed. .

  And it conveys to the said front-and-back change position which becomes the downstream in a conveyance path | route, returns the front and back of the said liquid crystal display panel 1, and again mounts the liquid crystal display panel 1 on the upper surface of the conveyance roller 32 of the conveying apparatus 30 one by one. And it conveys to a 2nd sticking work position, a polarizing film is stuck on the other surface of the liquid crystal display panel 1 similarly to the work in a 1st sticking work position, and the liquid crystal display panel 1 is completed.

JP 2001-154177 A

  However, during the polarizing film sticking operation using the polarizing film sticking apparatus 1, when the guide member 39 is in contact with the side portion of the liquid crystal display panel 1 and performs alignment, a glass chip-like foreign material (hereinafter referred to as a “chip”) is used. G (referred to as glass waste) was generated from the edge portion and sometimes adhered to the surface of the liquid crystal display panel 1.

  The glass waste G is considered to be caused by a residual stress when the liquid crystal display panel 1 is divided, and is likely to be generated by coming into contact with a sectional surface before a lapse of time from the dividing operation, and after the stress is calmed down. In addition, it is known that the residual stress is removed by contact with other members and the like, and once the glass waste G is generated, it is difficult to generate. The calming can be achieved by allowing a considerable time to elapse from the dividing work, but a space and time for storing the divided liquid crystal display panel 1 for a considerable time are required, resulting in poor productivity and workability efficiency.

  As described above, the pasting surface of the liquid crystal display panel 1 is also cleaned by using the cleaning roller 42 as described above. The cleaning roller 42 contacts the pasting surface of the liquid crystal display panel 1 and has a sectional surface. The glass scrap G is not generated by the contact of the cleaning roller 42, as shown in FIGS. 5 and 6, and the guide member 39 is contacted at the time of alignment performed after the cleaning, as shown in FIGS. At present, glass waste G is generated and adheres to the surface of the liquid crystal display panel 1.

  And if a polarizing film is stuck on the liquid crystal display panel 1 in that state, the glass waste G may be sandwiched between the glass substrate of the liquid crystal display panel 1 and the polarizing film, or the glass substrate may be damaged by the glass waste G. There is.

  Then, this invention is made | formed in view of such a point, and it aims at providing the manufacturing method and film sticking apparatus of a display panel which can reduce generation | occurrence | production of the problem caused by glass waste. .

  In order to achieve the above-described object, the method for manufacturing a display panel according to the present invention includes a step of attaching a film of the display panel in a film attaching step of attaching a film to the display panel divided in the step of dividing the display panel having a glass substrate. Before cleaning the surface to be processed, the substrate processing is performed by bringing a glass dust inducing member into contact with the edge portion of the surface divided in the dividing step.

  According to the display panel manufacturing method of the present invention, the glass waste inducing member is brought into contact with the edge portion of the display panel to actively generate glass waste, and then the substrate surface is cleaned to obtain the glass waste. By removing the film, it is possible to attach the film to the surface of the display panel without interposing foreign matter.

  Moreover, the film sticking device of the present invention is arranged on the edge of the display panel to be transported in order from the upstream side on the transport path of the display panel by the transport device capable of transporting the divided display panels one by one. A glass waste inducing device having a glass waste inducing member made abutable, a cleaning device for cleaning the surface to which the film of the display panel is attached, and an attaching head device for attaching the film to the display panel are provided. It is characterized by that.

  According to the film sticking device of the present invention, the glass scraping member is brought into contact with the edge portion of the face cut in the cutting step to forcibly generate the glass scrap, and the surface on which the film of the display panel is stuck is provided. After cleaning and removing the glass waste, the film can be attached to the surface of the display panel without any foreign matter.

  Further, by using the glass dust inducing member as a roller that can be rotated in contact with the edge portion of the display panel, glass dust can be induced without hindering the conveyance of the display panel. Here, the edge portion of the display panel is an edge portion of a surface on which a dividing line for dividing the display panel is formed, and stress at the time of forming the dividing line remains in the edge portion.

  Then, a cut groove having a V-shaped cross section is formed in the circumferential direction so that the edge portion of the display panel is brought into contact with the outer peripheral surface of the roller, so that the roller is surely applied to the edge portion of the display panel. In addition, it is possible to deal with display panels having different thickness dimensions.

  Furthermore, the vacuum device is provided with a vacuum device that suctions and cleans the surface of the display panel to be transported on the downstream side of the glass dust inducing member in the transport path, so that the vacuum device rides on the glass scrap that has run on the polarizing film sticking surface of the display panel. Can be aspirated and removed.

  Still further, the glass dust inducing device includes an air blow device that blows and cleans the outer peripheral surface of the roller, whereby glass dust attached to the roller can be blown and removed by the air blow device.

  As described above, according to the display panel manufacturing method and the film sticking apparatus of the present invention, it is possible to reduce the occurrence of problems caused by glass waste and improve the productivity and workability of the display panel. Has an effect.

  The manufacturing method of the liquid crystal display panel 1 of this embodiment uses the polarizing film sticking apparatus 11 provided with the following structures in the sticking process of the polarizing film which is 1 type of a film, The polarizing film of the said liquid crystal display panel 1 is used. Before cleaning the surface to be attached, the substrate processing is performed by bringing a glass dust inducing member into contact with the edge portion of the surface divided in the dividing step.

  Here, FIG. 1 thru | or FIG. 3 shows the polarizing film sticking apparatus 11 in this embodiment. In addition, below, description is abbreviate | omitted about the structure same as the conventional polarizing film sticking apparatus 11 mentioned above, and only a different point is demonstrated.

  In the polarizing film sticking apparatus 11 of this embodiment, as shown in FIG. 1, the glass dust inducer 21 is arrange | positioned in the upstream in the conveyance direction of the said 1st sticking operation position.

  Specifically, the glass dust inducing device 21 is disposed on the upstream side of the cleaning roller 42 in the conveyance path, and is a pair of glass dust induction capable of coming into contact with the edge portion of the liquid crystal display panel 1 being conveyed. A member 22 is provided, and a sensing sensor S that detects the tip of the liquid crystal display panel 1 to be transported is disposed on the upstream side in the transport direction of the glass dust inducing member 22.

  As shown in FIGS. 2 and 3, the glass dust inducing member 22 can perform a contact / separation operation from the side with respect to the liquid crystal display panel 1 conveyed by a contact / separation mechanism (not shown) at a height position adjusted in advance. It is said that. In addition, when the model of the liquid crystal display panel 1 to be processed changes and its thickness changes, the glass dust inducing member 22 is adjusted for height as a setting before driving.

  The glass dust inducing member 22 is a roller that can rotate in synchronism with the rotation of the transport roller 32 by a driving device (not shown) in a state of being in contact with the edge portion on the side of the liquid crystal display panel 1. On the outer peripheral surface of the roller, a groove 23 having a V-shaped cross section for contacting the edge portion of the liquid crystal display panel 1 is formed in the circumferential direction. In this embodiment, the roller is formed of a high hardness rubber having a hardness of 90 degrees (Shore A). Moreover, in order to generate glass scraps appropriately at the edge portion, it is preferable to apply stress from an oblique direction. That is, the contact with the cut groove 23 having a V-shaped cross section is preferable because stress is applied from an oblique direction, and glass dust is easily generated.

  The glass dust inducing member 22 uses the detection sensor S to detect the tip of the liquid crystal display panel 1 as an opportunity to start the approaching operation and the rotation operation, and the liquid crystal display panel 1 of the third sensor S3 is started. The detection of the tip is controlled to trigger the separation operation and the rotation operation.

  The glass dust inducing device 21 includes an air blow device 25 that blows and cleans the glass dust G adhering to the kerf 23 on the outer peripheral surface of the roller of the glass dust inducing member 22. In the present embodiment, the air blow device 25 is formed integrally with the contact / separation mechanism by positioning a blow-out port 26 in the vicinity of the cut groove 23 on the side opposite to the conveyance path of the roller as the glass dust inducing member. .

  Further, in the present embodiment, the glass waste G that drops off from the liquid crystal display panel 1 and the glass waste G blown by the air blowing device 25 are collected below the conveyance path at the position where the glass waste inducing member 22 is disposed. A glass waste receptacle 27 is provided.

  Further, on the downstream side of the glass dust inducing member 22 in the transport path and above the transport path, the dimension is equal to or greater than the width direction orthogonal to the transport direction of the liquid crystal display panel 1. A vacuum device 28 serving as a first cleaning device having a suction port (not shown) formed so as to face the surface is disposed. The second cleaning device is the cleaning roller 42.

  Both the air blow device 25 and the vacuum device 28 are triggered by the detection of the tip of the liquid crystal display panel 1 by the sensing sensor S, and the detection of the tip of the liquid crystal display panel 1 by the third sensor S3 described above. Is controlled to trigger driving.

  Next, a manufacturing method of the liquid crystal display panel 1 of the present embodiment, in which a polarizing film is attached to each liquid crystal display panel 1 using the polarizing film sticking apparatus 1 configured to include the glass dust inducing device 21 described above. explain.

  First, the main switch of the transport device 30 is turned on, the transport rollers 32 are rotated at a predetermined rotational speed, and the liquid crystal display panels 1 are placed one by one on the upper surface.

  The liquid crystal display panel 1 placed on the transport device 30 is transported to the position where the glass dust inducing device 21 is disposed.

  At this time, when the sensing sensor detects the tip of the liquid crystal display panel 1, the glass dust inducing member 22 in the form of a roller starts rotating in synchronization with the transport speed of the liquid crystal display panel 1, and The approach to the liquid crystal display panel 1 is started by driving the contact / separation mechanism. The vacuum device 28 and the air blow device 25 also start driving.

  The glass dust inducing member 22 is synchronized with the rotation of the transport roller 32 while the edge of the liquid crystal display panel 1 is brought into contact with the cut groove 23 on the side of the liquid crystal display panel 1 to be transported. Rotate. The rotation of the glass dust inducing member 22 may be driven by contact with the liquid crystal display panel 1.

  At this time, the glass dust G is induced by the glass dust inducing member 22 coming into contact with the edge portion of the liquid crystal display panel 1. And the glass waste G which generate | occur | produced in the edge part in the lower surface side of the said liquid crystal display panel 1 is collect | recovered by the said glass waste receptacle 27 by the dead weight. Further, the glass dust G attached to the glass dust inducing member 22 is blown by driving the air blowing device 25, removed from the surface of the glass dust inducing member 22, and collected in the glass dust receiving 27. Further, since the cut groove 23 having a V-shaped cross section is formed in the roller which is the glass dust inducing member 22, even if the thickness of the liquid crystal display panel 1 is different, it is surely brought into contact with the edge portion of the liquid crystal display panel 1. be able to. Further, the front-side edge portion and the back-side edge portion of the liquid crystal display panel 1 can be brought into contact with each other at the same time by the cut groove 23 having a V-shaped cross section, thereby simplifying the process.

  Further, when the liquid crystal display panel 1 is conveyed, the vacuum device 28 sucks and removes the glass dust G riding on the polarizing film sticking surface of the liquid crystal display panel 1 from the suction port. Thus, by setting it as the structure which attracts | sucks and removes the glass waste G, possibility that the glass waste G will damage the glass substrate of the liquid crystal display panel 1 will become low, and productivity can be improved.

  Then, the liquid crystal display panel 1 in a state where a series of substrate processing for compulsorily generating and removing the glass waste G is transported to the first attaching work position, and the polarizing film is attached in the same manner as in the past. Made.

  That is, when the first sensor detects the tip of the liquid crystal display panel 1 at the first attaching work position, the cleaning roller 42 as the second cleaning device is lowered and conveyed. An adhesive sheet is brought into surface contact with the upper surface of the sheet. Then, by rotating following the conveyance of the liquid crystal display panel 1, dust or the like adhering to the upper surface, which is the attaching surface of the polarizing film, is adhered to the adhesive sheet, and the upper surface is cleaned.

  Thereafter, when the second sensor detects the tip of the liquid crystal display panel 1 that is transported in a state where dust or the like is removed by the adhesive sheet, the stopper 35 starts to move upward, and the tip is placed in the transport path at the uppermost position. Position the part and stop.

  Further, when the liquid crystal display panel 1 is further transported, the liquid crystal display panel 1 makes its tip end abut against the stopper 35. At this time, when the third sensor S3 detects the tip of the liquid crystal display panel 1, the transport roller 32 of the transport device 30 stops rotating and the stopper 35 starts to descend. In the present embodiment, the glass dust inducing member 22 also stops rotating and starts to move away from the transport path of the liquid crystal display panel 1, and the vacuum device 28 and the air blow device 25 also stop driving. At the same time, after the guide member 39 is lifted, a series of operations close to the transported liquid crystal display panel 1 is started, and the liquid crystal display panel 1 is brought into contact with the side of the liquid crystal display panel 1 from both sides. Align to a predetermined position.

  Further, when the third sensor detects the tip of the liquid crystal display panel 1, the cleaning roller 42 is also raised.

  In this state, the driving of the sticking head device 37 is started, and the polarizing film sucked by the polarizing film suction plate is stuck on the upper surface of the liquid crystal display panel 1 aligned with the first sticking work position.

  When the application of the polarizing film by the application head device 37 is completed, a series of operations of separating and lowering the guide member 39 is started, and the rotational driving of the conveying roller 32 is resumed.

  Then, the liquid crystal display panel 1 is transported to the front / back conversion position on the downstream side in the transport path, and the front and back surfaces of the liquid crystal display panel 1 are returned. Place one by one, transport to the second affixing work position, attach a polarizing film to the other surface of the liquid crystal display panel 1 in the same way as the work at the first affixing work position, and attach the liquid crystal display panel 1 Finalize.

  As described above, the glass dust inducing member 22 is brought into contact with the edge portion of the surface divided in the dividing step to forcibly generate the glass dust G, and then the surface on which the polarizing film of the liquid crystal display panel 1 is pasted. By making the procedure of cleaning and attaching the polarizing film, it is possible to reduce the occurrence of problems caused by the glass waste G and to improve the productivity and workability of the liquid crystal display panel 1.

  Further, the present invention is not limited to the above-described embodiments, and various modifications can be made as necessary.

  For example, in the above-described embodiment, the case where both the vacuum device and the cleaning roller are provided as the cleaning device for cleaning the sticking surface of the polarizing film of the liquid crystal display panel is described, but only one of the cleaning devices is provided. It is also possible to adopt a configuration.

  Further, the drive control (sequence control) of each device is not limited to the above-described trigger control, and any drive control that can perform smooth conveyance, substrate processing, and polarizing film pasting may be used.

  Furthermore, the display panel may be an organic EL display panel or a plasma display panel. In the organic EL display panel, a film to be attached includes a λ / 4 plate for preventing reflection.

The typical top view which shows the arrangement | positioning relationship of each apparatus in one Embodiment of the polarizing film sticking apparatus used for the manufacturing method of the display panel of this invention. Typical top view which shows the arrangement | positioning relationship of the glass dust induction apparatus in the polarizing film sticking apparatus of FIG. III-III sectional view of FIG. Typical top view which shows the arrangement | positioning relationship of each apparatus in an example of the conventional polarizing film sticking apparatus FIG. 4 is a schematic plan view showing the arrangement relationship (partly operation direction) of each device in the polarizing film sticking device of FIG. VI-VI sectional view of Fig. 5 (some directions of operation) VII-VII sectional view of FIG. 5 (some directions of operation)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 11 Polarizing-film sticking apparatus 21 Glass waste inducer 22 Glass waste inducer 23 Cut groove 25 Air blow apparatus 26 Outlet 27 Glass waste receptacle 28 Vacuum apparatus 30 Conveyance apparatus 31 Support wall 32 Conveyance roller 35 Stopper 37 Sticking head apparatus
39 Guide member 42 Cleaning roller S sensor S0 detection sensor S1 first sensor S2 second sensor S3 third sensor
G Glass waste

Claims (6)

  In the film sticking step of sticking a film to the display panel cut in the cutting step of the display panel having a glass substrate, before cleaning the surface of the display panel to which the film is stuck, the edge of the face cut in the cutting step A method of manufacturing a display panel, wherein a substrate is processed by bringing a glass dust inducing member into contact therewith.   A glass dust inducing member capable of coming into contact with an edge portion of the display panel to be transported in order from the upstream side on the transport path of the display panel by the transport device capable of transporting the divided display panels one by one. A film sticking device, comprising: a glass dust inducing device, a cleaning device for cleaning a surface to which a polarizing film of the display panel is attached, and a sticking head device for sticking a film to the display panel.   The film sticking apparatus according to claim 2, wherein the glass dust inducing member is a roller that is rotatable while being in contact with an edge portion of the display panel being conveyed.   The film sticking device according to claim 3, wherein a cut groove having a V-shaped cross section for contacting an edge portion of the liquid crystal display panel is formed in a circumferential direction on the outer peripheral surface of the roller.   The film sticking apparatus of any one of Claims 2 thru | or 4 provided with the vacuum apparatus which carries out the suction cleaning of the surface of the display panel conveyed in the downstream of the glass waste induction member in the said conveyance path | route.   The film sticking device according to any one of claims 3 to 5, wherein the glass dust inducing device includes an air blowing device that blows and cleans an outer peripheral surface of the roller.

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