JP5190024B2 - ACF sticking device and flat panel display manufacturing device - Google Patents

Description

The present invention relates to a liquid crystal display and a plasma display, in which about the production equipment of the flat panel display to which the ACF attachment device and the device for sticking an ACF to the substrate constituting the flat panel display such as an organic EL display.

  A liquid crystal display as a flat panel display is formed by bonding a TFT substrate and a color filter substrate to form a panel substrate, and encapsulating liquid crystal between the panel substrates. A driver circuit is connected around the panel substrate. The driver circuit can be connected to the panel substrate (TFT substrate of the panel substrate) using the COG (Chip On Glass) method in which the IC chip is directly mounted, or TCP (Tape Carrier Package) in which the IC chip is mounted on a film substrate. TAB (Tape Automated Bonding) method.

  An electrode pattern having a large number of electrodes is formed on the panel substrate, and an IC chip electrode or a TCP electrode is connected to each electrode. The distance between the electrodes is extremely small, and therefore, an anisotropic conductive film ACF (Anisotropic Conductive Film) is used to connect the panel substrate and the driver circuit. ACF is a thermosetting adhesive film, and ACF is laminated on a separator to constitute an ACF tape. The driver circuit is mounted by pasting the ACF of the ACF tape on the panel substrate in advance and then thermocompression bonding the panel substrate and the driver circuit. The ACF sticking apparatus performs the process of sticking the ACF to the panel substrate. This ACF sticking apparatus is provided with a supply reel around which an ACF tape is wound, and the ACF tape fed out from the supply reel is drawn along a predetermined path and led to a portion where thermocompression bonding is performed. For this purpose, guide rollers are provided at a plurality of locations in the apparatus.

  In recent years, a single ACF tape is formed by connecting a plurality of ACF tapes. Patent Document 1 discloses a sticking device using an ACF tape in which a plurality of ACF tapes are connected. In this technique, a dedicated tape (connecting tape) is used to connect the ACF tapes. This connecting tape is different from a normal ACF tape in terms of hardness, weight, etc., and is a tape having a different material from the ACF tape. Accordingly, it is necessary to prevent the seam part (the part where the ACF tape is connected) and its periphery from being thermocompression bonded to the panel substrate.

  On the other hand, a method of joining the end portions of the ACF tape by heat treatment or ultrasonic treatment has been used. In this method, since the end portions of the ACF tape are directly joined and connected, a separate tape such as a connection tape is not used. However, even in this case, since the seam portion has two layers of ACF tape, it is necessary to prevent this portion from being attached to the panel substrate.

  Regardless of the method using the connecting tape or the method in which the end portions are directly joined to each other, the joint portion must be adhered to the panel substrate in any case. For this reason, in the technique of Patent Document 1, a joint detection sensor is provided to detect a joint part, and the part is affixed to the panel substrate so as to avoid the part.

JP 2003-209143 A

  By the way, the joint portion of the ACF tape is performed using a detection sensor that performs optical detection. As described above, there are two methods for connecting ACF tapes: a method using connecting tapes and a method using connecting ACF tapes. In a method using connecting tapes, ACF tapes and connecting tapes have hardness, weight and color. Because different materials are used in terms of, etc., detection of the seam site is extremely easy. On the other hand, in the method of connecting the end portions of the ACF tape, since the same type of ACF tapes are connected to each other at the seam part, the seam part and the other parts are hardly distinguishable. For this reason, detection of a seam part becomes very difficult.

  Therefore, an object of the present invention is to make it possible to detect a joint portion of ACF tapes obtained by joining and connecting ACF tapes.

In order to solve the above problems, the ACF sticking apparatus according to claim 1 of the present invention detects a seam portion of an ACF tape in which the ends of an ACF tape in which ACF is laminated on a white or transparent separator are joined to each other. An ACF sticking device including an ACF seam detecting unit, wherein the ACF seam detecting unit receives an illumination unit for illuminating the ACF tape and receives light from the illuminated ACF tape to detect the seam part. And a white member provided between the illumination unit and the detection sensor and disposed on the opposite side of the detection sensor with the ACF tape interposed therebetween.

  According to this ACF sticking apparatus, the white member is provided on the opposite side of the detection sensor with the ACF tape interposed therebetween. The detection sensor detects light from the ACF tape, and disturbance light is eliminated by the white member arranged on the opposite side of the ACF tape. The separator constituting the ACF tape is made of PET (polyethylene terephthalate), and there are two types of PET, white and transparent. Any color can be used as the separator. However, when a transparent separator is used, the white member makes the background white, and the color difference from the white separator can be canceled. As a result, it is possible to perform joint detection based on a slight light amount difference regardless of the type of separator.

  The ACF sticking apparatus according to claim 2 of the present invention is the ACF sticking apparatus according to claim 1, wherein the white member is made translucent, and the illuminating unit illuminates the ACF tape through the semitransparent white member. It is characterized by doing.

  According to this ACF sticking device, the ACF tape is illuminated through the semi-transparent white member. By making the white member translucent, the diffused light can be illuminated on the ACF tape. Since the ACF tape is a glossy member, the use of uneven and uneven direct light may reduce detection accuracy due to the gloss. For this reason, it is possible to perform detection with high accuracy by performing joint detection with diffused light having a uniform spread without unevenness.

  An ACF sticking device according to a third aspect of the present invention is the ACF sticking device according to the first aspect, wherein the seam detecting portion includes a supply reel wound with the ACF tape and a tension arm for feeding the ACF. It arrange | positions in the area | region between two guide rollers arrange | positioned between.

  According to this ACF sticking device, the joint detection part is arranged in the region between the two guide rollers. This region (joint detection region) is a region between the supply reel and the tension arm, and the tension force is always applied to the ACF tape by the tension arm. For this reason, the ACF tape is not bent or distorted, and the light amount can be accurately detected. In addition, since the seam detection area is set between the two fixed guide rollers, it is not affected by the amount of winding of the supply reel or the operation of the tension arm.

  The ACF sticking apparatus according to claim 4 of the present invention is the ACF sticking apparatus according to claim 1, wherein the illumination unit illuminates light modulated to a specific frequency, and the detection sensor is a frequency synchronized with the frequency. The light is detected.

  According to this ACF sticking device, since the illumination light of the illumination unit and the light detected by the detection sensor have a synchronized frequency, the light quantity detection can be performed with high accuracy without being affected by disturbance light or ambient light. Will be able to do.

  An ACF sticking device according to claim 5 of the present invention is the ACF sticking device according to claim 1, comprising an attachment mechanism to which the seam detecting portion and the ACF sticking portion are attached, the seam detecting portion and the ACF being attached. The affixing portion is distributed and arranged on different surfaces of the attachment mechanism.

  According to this ACF sticking device, the ACF joint detection part is arranged on a different surface from the ACF sticking part. The ACF joint detection part and the ACF sticking part each require a certain occupied area, and the degree of freedom of design is improved by arranging them on different surfaces.

  A flat panel display manufacturing apparatus according to a sixth aspect of the present invention includes the ACF sticking apparatus according to any one of the first to fifth aspects. A flat panel display according to a seventh aspect of the present invention is manufactured by the flat panel display manufacturing apparatus according to the sixth aspect.

  The ACF sticking apparatus described above can be applied to a manufacturing apparatus for flat panel displays such as a liquid crystal display, an organic EL display, and a plasma display, and particularly to a device for attaching an ACF to a panel substrate. By applying the ACF sticking apparatus described above, it is possible to avoid the seam part from being stuck to the panel substrate by mistake.

  In the present invention, since the white member is arranged on the opposite side of the detection sensor with the ACF tape interposed therebetween, the influence of disturbance light on the back side of the ACF tape can be eliminated. Further, by arranging the white member, it is possible to perform the seam detection based on a slight light amount difference regardless of whether a transparent separator is used or a white separator is used.

It is a principal part top view of a panel board | substrate and a driver circuit. It is a figure which shows schematic structure of the ACF sticking apparatus in embodiment. It is a figure which shows the state which has detected the joint part of the ACF tape. It is a figure which shows schematic structure of the ACF sticking apparatus in a 1st modification. It is a figure which shows schematic structure of the ACF sticking apparatus in a 2nd modification. It is a front view of the ACF sticking apparatus in the 3rd modification. It is a side view of the ACF sticking apparatus in the 3rd modification. It is a side view of the ACF sticking apparatus in the 4th modification. It is a side view of the ACF sticking apparatus in the 5th modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, an example of attaching ACF to a panel substrate constituting a liquid crystal display is shown, but the present invention can be applied to any flat panel display such as a plasma display or an organic EL display other than a liquid crystal display. In addition, the panel substrate is described in which a TAB method for connecting a TCP having an IC chip mounted on a film substrate is applied, but a COG method in which an IC chip is directly mounted on a panel substrate is applied. Also good.

  FIG. 1 shows a panel substrate 1, which is formed by bonding liquid crystal between a TFT substrate 2 and a color filter substrate 3. The TFT substrate 2 is configured to project a predetermined region from the color filter substrate 3 to form a projecting portion 2A, and a plurality of driver circuits 4 are connected to the projecting portion 2A. The driver circuit 4 has an IC chip (integrated circuit element) 4B mounted on a film substrate 4A. In addition, although the overhang | projection part 2A is provided in 2 sides of the panel board | substrate 1 of FIG. 1, you may provide in 1 side or 3 sides or more.

  In the overhang region of the panel substrate 1, an electrode group 5 composed of a plurality of electrodes is formed at predetermined intervals. Each electrode group 5 corresponds to one driver circuit 4, and alignment marks 6 </ b> A and 6 </ b> A are formed at the ends of the electrode group 5. On the other hand, an electrode group 7 composed of a plurality of electrodes is also formed in the driver circuit 4, and alignment marks 6B and 6B are formed at the ends, respectively. The positions of the electrodes of the electrode group 5 and the electrodes of the electrode group 7 are adjusted and connected based on the alignment marks 6A, 6A on the panel substrate 1 side and the alignment marks 6B, 6B on the driver circuit 4 side. .

  An ACF 8 is attached to each electrode group 5 of the panel substrate 1, and the panel substrate 1 and the driver circuit 4 are connected via the ACF 8. ACF8 is a binder resin having a bonding function in which a large number of fine conductive particles are dispersed. By heating and pressing the panel substrate 1 and the driver circuit 4 with the ACF8 interposed, the electrodes are connected via the conductive particles. The electrodes of group 5 and the electrodes of electrode group 7 are electrically connected. The driver circuit 4 can be fixed to the panel substrate 1 by thermosetting the binder resin.

  An ACF attaching apparatus 10 for attaching the ACF 8 to the panel substrate 1 is shown in FIG. The ACF sticking device 10 has a mounting mechanism provided in a vertical direction, and a supply reel 11 is detachably mounted thereon. This attachment mechanism is a box-shaped plate for attaching various elements necessary for the ACF sticking device 10. The supply reel 11 is for winding an ACF tape 13 formed by laminating ACF 8 on the release layer of the separator 12. The ACF tape 13 is formed as a long tape by connecting ends of a plurality of ACF tapes. The ACF tape 13 travels along the travel path of the guide rollers 14 to 19 attached to the ACF sticking device 10. A driving roller 20 is provided on the rear side of the guide roller 19. The driving roller 20 is composed of a driving roller 20A and a pinch roller 20B, and the separator 12 after the ACF 8 is peeled is sandwiched and sent to the discharge unit 21.

  The guide rollers 14 to 16 are guide rollers for the feeder of the ACF tape 13, and the guide roller 16 is attached to the tension arm 22. The tension arm 22 oscillates about the rotation shaft 23 and is oscillated in the direction of arrow F by a driving means (not shown) connected to the rotation shaft 23. When this swinging is performed, the ACF tape 13 is sent out and stays between the guide rollers 14 to 16. On the other hand, the ACF tape 13 is guided by the guide roller 17, and the ACF tape 13 is guided in the horizontal direction along the traveling path by the guide rollers 18 and 19. The guide roller 18 sets the ACF 8 sticking start position, and the guide roller 19 sets the sticking end position, and the ACF 8 sticking area is set by these.

  A crimping head 30 as an ACF attaching portion is provided in the ACF 8 attaching region. The pressure-bonding head 30 includes a pressure blade 31 and a receiving blade 32 provided on the upper and lower sides, and is attached to elevating blocks 33 and 34, respectively. These elevating blocks 33 and 34 are mounted so as to be vertically displaceable along a pair of guide rails 35 provided in the ACF sticking device 10. The pressure blade 31 and the receiving blade 32 are arranged up and down across the panel substrate 1 and are formed to have the same length.

  The lifting block 34 to which the receiving blade 32 is attached is moved up and down by a predetermined stroke by the cylinder 36. That is, when the cylinder 36 is in the contracted state, the receiving blade 32 descends and is disposed at a lower position away from the panel substrate 1, and when the cylinder 36 is extended, the receiving blade 32 is attached to the panel substrate 1. Contact the lower surface. On the other hand, a pressurizing means 37 is provided on the lifting block 33 on which the pressurizing blade 31 is mounted. The pressurizing means 37 can be moved up and down along the guide rail 35 by a feed screw driven by a motor (not shown). Then, with the panel substrate 1 supported by the receiving blade 32, the pressure blade 31 is lowered from above to apply a predetermined pressure. Heating means (not shown) such as a heater is provided on one or both of the pressure blade 31 and the receiving blade 32, and a predetermined pressure is applied to the ACF tape 13 and heating is performed at a predetermined temperature. I do. The degree of heating at this time is so low that the binder resin of ACF8 is somewhat softened so that the adhesive strength is not lost.

  Half-cut means 40 is provided slightly downstream of the guide roller 18, and the half-cut means 40 is the same as the thickness of the separator 12 constituting the ACF tape 13 or slightly shorter than that. An incision is formed at the ACF8 site. As a result, only ACF 8 of the ACF tape 13 is half-cut, and the ACF 8 is divided while the separator 12 remains connected. Then, the pressure-bonding head 30 presses and heats the half-cut ACF tape 13 against the panel substrate 1 as described above, whereby the ACF 8 is completely attached to the panel substrate 1.

  As shown in FIG. 2, a seam detector 50 is provided on the travel path of the ACF tape 13. The joint detection unit 50 includes an illumination unit 51, a translucent plate 52, and a detection sensor 53, and the joint detection unit 50 is provided between the guide rollers 14 and 15. The illumination unit 51, the translucent plate 52, and the detection sensor 53 are arranged in a straight line. The illuminating unit 51 is a means for illuminating the ACF tape 13 and illuminates the ACF tape 13 via a translucent plate 52. The translucent plate 52 is a translucent plate member (white member) colored white, for example, it is milky white as a whole. The translucent plate 52 has a function of partially transmitting light from the illumination unit 51 (transmitted light amount suppressing function), and the transmittance can be appropriately set according to the purpose.

  Illumination light from the illumination unit 51 is transmitted through the translucent plate 52 and illuminates the ACF tape 13. The translucent plate 52 is disposed at a position in contact with or very close to the ACF tape 13. The detection sensor 53 is a sensor that performs optical detection, and detects the amount of light transmitted through the translucent plate 52 and the ACF tape 13. The detection sensor 53 is provided on the opposite side of the illumination unit 51 and the translucent plate 52 with the ACF tape 13 in between. The side of the ACF tape 13 on which the illumination unit 51 and the translucent plate 52 are provided is the back side, and the side on which the detection sensor 53 is provided is the front side.

  In FIG. 1, the ACF 8 is individually attached to each electrode group 5. However, the ACF 8 may be attached in a lump so as to include all of the electrode groups 5 on one side. .

  The operation in the above will be described. As described above, the ACF tape 13 is obtained by connecting a plurality of ACF tapes. Accordingly, the ACF tape 13 has a plurality of joint portions (portions connecting the ACF tapes). The seam portion is composed of two layers of ACF tape 13, and this portion is thicker than the portion of one layer. These two joints are joined by performing heat treatment, ultrasonic treatment, or the like on the joint portion. As a result, the ACF tapes are firmly and reliably connected.

  Since the seam portion of the ACF tape 13 has two layers, this portion does not exhibit the function of electrically connecting the panel substrate 1 and the driver circuit 4. Therefore, it is necessary to affix to the panel substrate 1 while avoiding the part. For this purpose, the joint detection unit 50 detects the position of the joint part in advance. Then, based on the travel distance and travel speed of the ACF tape 13, drive control of the drive roller 20 is performed so that the joint portion is not positioned on the crimping head 30. Thereby, it is possible to prevent the ACF tape 13 at the joint portion from being attached to the panel substrate 1.

  The joint detection unit 50 always detects the joint part of the traveling ACF tape 13. The detection sensor 53 detects light from the ACF tape 13, and recognizes the joint portion by the light amount difference between the joint portion and the other portions. Light from the illumination unit 51 passes through the translucent plate 52 and irradiates the ACF tape 13. As shown in FIG. 3, the ACF tape 13 has two layers at the seam portion and one layer at the other portions. Therefore, there is a difference in thickness and a difference in transmittance. The amount of transmitted light in the two-layer part is reduced, and the amount of transmitted light in the one-layer part is larger than that in the two-layer part. As a result, a difference occurs in the amount of light received by the detection sensor 53, so that the joint portion can be recognized.

  Here, the separator 12 is made of PET, and there are two types of PET, white and transparent, and ACF8 is a transparent resin film colored in gold or gray. Therefore, there are two types of separators 12, white and transparent. When the separator 12 is white, the joint portion is detected by a difference in transmittance between the first layer portion and the second layer portion of the separator 12. The portion where the separator 12 has two layers has a smaller amount of transmitted light than the portion where the separator 12 has a single layer. On the other hand, when the separator 12 is transparent, the joint portion is detected by the difference in transmittance between the portion where the ACF 8 is one layer and the portion where the ACF 8 is two layers. At this time, since the separator 12 is transparent and cannot be detected by the separator 12, the detection is performed by the ACF 8. Since the ACF 8 is colored in gold or gray, the amount of transmitted light is reduced in the two-layered portion rather than the one-layered portion. With this, the joint portion is detected.

  Since the separator 12 is an ultra-thin tape and the ACF 8 is also an ultra-thin resin film, there is almost no difference in transmittance between the two layers. For this reason, it is necessary to detect a seam portion by detecting a slight light amount difference generated between the portion of the first layer and the portion of the second layer. Regardless of whether the separator 12 is white, if it is transparent, the ACF tape 13 is almost transparent as a whole regardless of whether it is a single layer or two layers. Therefore, disturbance light on the back side of the ACF tape 13 is directly applied to the detection sensor 53. Affect it.

  Therefore, the translucent plate 52 is disposed on the back side of the ACF tape 13. Thereby, even if the separator 12 is transparent, since the disturbance light is eliminated when it passes through the semi-transparent plate 52, the detection sensor 53 does not detect the disturbance light. Thereby, the influence by disturbance light is excluded. Accordingly, the translucent plate 52 functions to remove ambient light. In an environment where the ambient light is small, the translucent plate 52 having a high transmittance is used, and in an environment where the ambient light is large. Alternatively, a translucent plate 52 having a low transmittance can be used.

  In addition, there are two types of separators 12, white and transparent. If the colors of the separators 12 are different, it is difficult to detect a slight light amount difference. In particular, when the separator 12 is transparent, the color of the member disposed on the back side of the ACF tape 13 is reflected, so that a color that is significantly different from white may be the background color. Therefore, the color of the translucent plate 52 disposed on the back side of the ACF tape 13 is the same as that of the white separator 12. As a result, when the separator 12 is transparent, the background color is the same white as the white separator 12, and the difference in color between white and transparent can be canceled. For this reason, it is possible to cancel at least an element such as a color difference, so that it is possible to detect a joint portion based on a slight light amount difference.

  As described above, the translucent plate 52 uses the illumination light of the illumination unit 51 as diffused light. The illumination light from the illuminating unit 51 becomes direct light with non-uniform unevenness. However, by passing through the semi-transparent plate 52, it becomes soft light as a whole, and this becomes diffused light having a uniform distribution. The diffused light illuminates the ACF tape 13. The ACF tape 13 is a glossy tape, and if directly irradiated with light, there is a risk that the amount of light may be erroneously detected due to the gloss. However, since the diffused light transmitted through the translucent plate 52 is detected, an error due to the gloss is detected. There is no risk of detection. As a result, accurate seam detection can be performed. That is, the translucent plate 52 functions as a diffused light generating means.

  Therefore, the translucent plate 52 performs the three functions of disturbance light removal, color difference cancellation and diffused light generation by one member, and it is not necessary to arrange each as a separate independent element, and the number of parts is small. Detection can be performed with.

  In the present invention, a seam detection area is set, and the seam detection unit 50 is disposed in the seam detection area. In FIG. 2, the joint detection area is provided between the guide rollers 14 and 15. A tension arm 22 is provided at the front end side of the guide roller 15, and this tension arm 22 functions to feed the ACF tape 13 from the supply reel 11. Accordingly, a tension is always applied to the ACF tape 13 between the supply reel 11 and the guide roller 16 provided on the tension arm 22, and the guide roller 14 provided between the supply reel 11 and the tension arm 22 The tension is always acting on the ACF tape 13 between the two.

  The detection sensor 53 detects the joint portion based on the amount of light received through the ACF tape 13. Therefore, if the ACF tape 13 is distorted or bent, the light amount cannot be accurately detected. Therefore, the joint detection area is set between the guide rollers 14 and 15. During this time, tension is always applied to the ACF tape 13, and no distortion or bending occurs, so that the accuracy of light quantity detection is not impaired. For this reason, a joint part can be detected with high accuracy.

  At this time, tension is always applied to the ACF tape 13 also in the region between the supply reel 11 and the guide roller 14 and the region between the guide roller 15 and the tension arm 22. For this reason, although these areas can be set as the seam detection area, the position where the supply reel 11 feeds the ACF tape 13 changes depending on the winding amount of the ACF tape 13, and the tension arm 22 faces the guide roller 15. Performs rocking motion. Therefore, if a joint detection region is set in these regions, the detection site may change or the operation of the tension arm 22 may be hindered. On the other hand, the area between the guide rollers 14 and 15 is a fixed area and is not affected by the amount of winding of the supply reel 11 or the operation of the tension arm.

  As described above, in the present invention, when the seam portion of the ACF tape 13 in which the ends of the plurality of ACF tapes are joined and connected is optically detected, the translucent plate 52 is whitened to make the ACF tape 13 white. In addition to being able to eliminate the influence of disturbance light, it is possible to cancel the difference in color between the separator 12 being white or transparent. Thereby, the joint detection based on a slight light quantity difference can be performed. Further, since the detection sensor 53 receives diffused light having a uniform distribution generated by the semitransparent plate 52, there is no possibility of erroneous detection due to gloss. Furthermore, since the area where the ACF tape 13 is always acting is set as a seam detection area, and the seam detection unit is provided in this area, accurate detection can be performed.

  In the above description, the seam detection unit 50 performs seam detection when the ends of the ACF tape 13 are joined to each other. However, the seam detection unit 50 can also be applied to the seam detection of ACF tapes connected using a dedicated connection tape. In the case where a dedicated connecting tape is used, the joint portion is formed by a connecting tape, and this connecting tape is a completely different material from the ACF tape, so that the light amount difference is very large. Therefore, the use of the joint detection unit 50 capable of detecting a slight difference in the amount of light makes it possible to detect the joint part by the connecting tape very easily. That is, the seam detection unit 50 can be applied to both cases where the ends of the ACF tapes are connected to each other, and whether the ACF tapes are connected using a dedicated connection tape.

  Moreover, you may make it modulate the frequency of the illumination light from the illumination part 51. FIG. If the detection sensor 53 detects light having a frequency synchronized with the frequency of the illumination light of the illumination unit 51, it is not affected by disturbance light other than the illumination unit 51, ambient light, or the like. This makes it possible to detect the seam portion with very high accuracy. In this case, a modulation unit that performs frequency modulation is connected to the illumination unit 51, and a control unit that controls to detect a frequency synchronized with this frequency is connected to the detection sensor 53.

  Next, a first modification of the present invention will be described with reference to FIG. In this modification, the illumination unit 51 is disposed on the surface side of the ACF tape 13 and the translucent plate 52 is not disposed. The illumination unit 51 illuminates the part of the ACF tape 13 that is in contact with the guide roller 14 from obliquely above, and the detection sensor 53 detects the part from above. In this modification, the detection sensor 53 detects reflected light instead of transmitted light. In the case of reflected light, regardless of the color of the separator 12, the reflectance of the two-layered portion is higher than that of the single-layered portion. However, as in the embodiment, the difference in the amount of reflected light is slight.

  In this modification, the guide roller 14 is white, and this guide roller 14 has a function as a white member. In this case, the guide roller 14 does not need to be translucent, but a guide roller that does not completely reflect light is used. The detection sensor 53 is disposed above the guide roller 14 and detects the lower side. By making the guide roller 14 white, even if disturbance light is generated, it is eliminated by the white guide roller 14 and does not affect the detection sensor 53. Further, the color difference of the separator 12 is canceled by making the guide roller 14 the same color as the white color of the separator 12. That is, among the functions provided to the translucent plate 52 of the above-described embodiment, the guide roller 14 is provided with a function of removing ambient light and a function of canceling the color difference of the separator 12.

  In addition, the detection sensor 53 is not disposed at a position where the reflected light of the illumination unit 51 is received, but is disposed at a position shifted from the optical axis. Thereby, the detection sensor 53 can receive diffused light instead of specularly reflected light. Therefore, the diffused light is generated without using a special member. As a result, since the guide roller 14 originally provided is white, disturbance light removal and color difference cancellation are performed, and diffused light is irradiated by shifting the optical axis. A member such as the dedicated translucent plate 52 is not necessary, and the number of parts can be reduced.

  Also in this modified example, the joint detection region is provided in the guide roller 14 and is a region where tension is always applied to the ACF tape 13. The guide roller 14 is an area that is not affected by the winding amount of the supply reel 11 or the tension arm 22.

  Next, a second modification will be described with reference to FIG. In this modification, the illumination unit is arranged as an illumination lamp 55 on the back side of the ACF tape 13, and the illumination lamp 55 illuminates the guide roller 14 from the side. The guide roller 14 is a translucent white member. The detection sensor 53 is provided above the guide roller 14 and detects the ACF tape 13 in contact with the guide roller 14.

  When the illumination light from the illumination lamp 55 is supplied to the guide roller 14, the light is supplied to the ACF tape 13 that is in contact with the guide roller 14. The guide roller 14 is a translucent white member, and the ACF tape 13 is illuminated with diffused light from the guide roller 14. The detection sensor 53 detects light transmitted through the ACF tape 13. Since the guide roller 14 is a translucent white member, ambient light is eliminated and the color difference of the separator 12 can be canceled. The joint detection area is provided on the guide roller 14 and is an area where the tension is always applied to the ACF tape 13 and is not affected by the winding amount of the supply reel 11 or the tension arm 22.

  Next, a third modification will be described. A front view of this modification is shown in FIG. 6, and a side view is shown in FIG. In this modification, the supply reel 11 and the seam detection unit 50 are arranged on the side surface of the attachment mechanism of the ACF sticking device 10, and the crimping head 30 is arranged on the front surface. In the embodiment and the first and second modifications described above, the elements of the supply reel 11, the crimping head 30, and the joint detection unit 50 are arranged on one surface of the attachment mechanism. In this modification, the crimping head 30 is arranged on the front surface of the ACF sticking device 10, and the supply reel 11 and the seam detection unit 50 are arranged on the side surface, that is, the respective elements are arranged in a distributed manner. Thus, the degree of freedom in design is improved by dispersively arranging the elements on one surface without concentrating them. In FIG. 6, an elevating unit 22 </ b> A that performs an elevating operation for feeding the ACF tape 13 is provided instead of the tension arm 22.

  FIG. 8 shows a side view of the ACF sticking device 10 in the fourth modification. In this modification, the joint detection unit 50 of the first modification is arranged on the side surface of the ACF sticking device 10. Moreover, FIG. 9 has shown the side view of the ACF sticking apparatus 10 in a 5th modification. In this modification, the joint detection unit 50 of the second modification is arranged on the side surface of the ACF sticking apparatus 10. Also in the fourth and fifth modified examples, since the supply reel 11 and the joint detection unit 50 are arranged on a different surface from the crimping head 30, the degree of freedom in design is improved. In the fourth and fifth modified examples, the guide roller 15 is irradiated, so that the guide roller 15 is white or translucent white. In the second modification, the illumination lamp 55 illuminates the guide roller 14 from the side. In the fifth modification, the illumination lamp 55 illuminates the guide roller 15 from the upper side to the lower side. There is no difference between lighting from above and lighting from above.

DESCRIPTION OF SYMBOLS 1 Panel board | substrate 4 Driver circuit 5 Electrode group 10 ACF sticking apparatus 11 Supply reel 12 Separator 13 ACF tape 14-19 Guide roller 22 Tension arm 30 Crimp head 50 Seam detection part 51 Illumination part 52 Translucent plate 53 Detection sensor 55 Illumination lamp

Claims (6)

An ACF sticking device comprising an ACF seam detection unit for detecting a seam portion of an ACF tape in which the ends of an ACF tape in which ACF is laminated on a white or transparent separator are joined to each other,
The ACF joint detection unit
An illumination unit for illuminating the ACF tape;
A detection sensor that receives light from the illuminated ACF tape and detects the joint portion;
A white member provided between the illumination unit and the detection sensor and disposed on the opposite side of the detection sensor with the ACF tape interposed therebetween;
An ACF sticking device comprising: 2. The ACF sticking apparatus according to claim 1, wherein the white member is made translucent, and the illumination unit illuminates the ACF tape through the translucent white member. 2. The seam detection unit is arranged in a region between two guide rollers arranged between a supply reel wound with the ACF tape and a tension arm for feeding out the ACF. ACF sticking apparatus of description. The ACF sticking apparatus according to claim 1, wherein the illumination unit illuminates light modulated to a specific frequency, and the detection sensor detects light having a frequency synchronized with the frequency. An attachment mechanism for attaching the joint detection part and the ACF attachment part;
2. The ACF sticking apparatus according to claim 1, wherein the joint detecting part and the sticking part of the ACF are distributed on different surfaces of the attachment mechanism.   An apparatus for manufacturing a flat panel display, comprising the ACF sticking device according to claim 1.

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