JP2004021003A - Alignment adjustment device and alignment adjustment method - Google Patents

Abstract

An alignment adjusting device and an alignment adjusting method capable of aligning an electrode terminal and a through hole with high accuracy are provided.
SOLUTION: CCD cameras 42A and 42B are arranged on the opposite side of the display panel stage 24 with the FPC stage 35 interposed therebetween. Since there is no need to secure a space for disposing the CCD cameras 42A and 42B between the display panel stay 24 and the FPC stage 35, the movement distance of the FPC stage 35 when connecting the FPC to the display panel is reduced. Even if the moving axis of the FPC stage 35 is displaced from the normal moving axis that allows the electrode terminals of the display panel and the through holes of the FPC to be properly aligned, the electrodes and the through holes associated with the movement of the FPC stage 35 can be used. Since the amount of misalignment is small, the electrode terminal and the through hole can be aligned with high accuracy.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an alignment adjustment device used in a manufacturing process of, for example, an organic electroluminescence (EL) display including a display panel and a wiring board, and an alignment adjustment method using the alignment adjustment device. In particular, the present invention relates to an alignment adjustment device and an alignment adjustment method used for aligning a connection terminal provided on a display panel with a connection hole provided on a wiring board.
[0002]
[Prior art]
In recent years, various displays having various display mechanisms have been widely used. Among them, the organic EL display using the organic EL phenomenon is excellent mainly in that the image quality is high and the power consumption is small.
[0003]
By the way, recently, in the display field, a larger display screen is desired. As a method for enlarging the display screen of an organic EL display, for example, a printed wiring board (FPC) for wiring connection is provided on a display panel in which a plurality of organic EL elements constituting pixels are provided on a transparent substrate such as glass. ) Is connected to form a display unit, and a plurality of display units are connected in a matrix to form a desired display screen size. In this method, for example, a plurality of electrode terminals provided for each organic EL element on the back surface of the display panel (the surface opposite to the display surface) and a plurality of electrode terminals provided on the FPC corresponding to these electrode terminals are provided. After the through holes are aligned with each other, the electrode terminals and the through holes are connected to each other using solder or the like.
[0004]
When connecting the electrode terminal and the through hole, for example, in order to ensure high connection accuracy, it is necessary to position the electrode terminal and the through hole with high precision. Therefore, the alignment operation between the electrode terminals and the through holes is performed, for example, by providing an alignment mark for confirming the alignment on the display panel or the FPC, and using an alignment adjusting device capable of visually recognizing the alignment mark.
[0005]
This alignment adjusting device is, for example, a general-purpose flip chip bonder applied, and includes a display panel stage for mounting a display panel, and an FPC for disposing the FPC for mounting the FPC. And a CCD (charge coupled device) camera disposed between the display panel stage and the FPC stage and having an optical system capable of simultaneously observing both the display panel and the FPC positioned above and below. . Each of the display panel stage and the FPC stage can move in three axes directions orthogonal to each other, and the CCD camera moves between a position (observation position) between the display panel stage and the FPC stage and an evacuation position. Is movable.
[0006]
The work of aligning the electrode terminals and the through holes using this alignment adjusting device is performed, for example, by the following procedure. That is, first, both the display panel and the wiring board are observed using the CCD camera located at the observation position, and the positions of the plurality of electrode terminals and the plurality of through holes to be connected to these electrode terminals are observed. Check the position. Subsequently, the position of each through-hole is made to coincide with the position of each electrode terminal by moving the FPC stage based on the observation image observed by the CCD camera. Finally, after moving the CCD camera from the observation position to the retracted position, the FPC stage is moved toward the display panel stage, so that the electrode terminal is inserted for each through hole. Thereby, the plurality of through holes are aligned with respect to the plurality of electrode terminals.
[0007]
[Problems to be solved by the invention]
However, the conventional alignment adjustment device has a problem in that, when the through hole is aligned with the electrode terminal, sufficient alignment accuracy may not be obtained mainly due to the configuration of the device. If sufficient alignment accuracy is not obtained, poor connection between the electrode terminals and the through holes will occur, and the yield of the organic EL display will decrease.
[0008]
Further, in the conventional alignment adjusting device, there is a problem that the manufacturing cost of the organic EL display increases because the device is large and expensive. In consideration of this point, it is necessary to reduce the cost of the alignment adjustment device as one of measures for reducing the cost of the organic EL display.
[0009]
The present invention has been made in view of such a problem, and a first object of the present invention is to provide an alignment adjustment device and an alignment adjustment method capable of aligning an electrode terminal and a through hole with high accuracy. is there.
[0010]
A second object of the present invention is to provide an alignment adjustment device and an alignment adjustment method that can realize low cost.
[0011]
[Means for Solving the Problems]
An alignment adjustment device according to the present invention is used for aligning a connection terminal provided on a display panel and a connection hole provided on a wiring board with each other, and a first holding means for holding the display panel. A second holding means for holding the wiring substrate so as to face the display panel held by the first holding means, and a second holding means interposed between the first holding means and the second holding means, First observing means for observing the connection terminals of the display panel held by the first holding means and the connection holes of the wiring board held by the second holding means; Alternatively, a positioning means for positioning the connection terminal of the display panel and the connection hole of the wiring board with each other by moving at least one of the second holding means is provided. That.
[0012]
The alignment adjustment method according to the present invention is a method for aligning a connection terminal provided on a display panel and a connection hole provided on a wiring board with each other. The first holding means uses a first holding unit to hold the display panel. A second step of using the second holding means to hold the wiring board so as to face the display panel held by the first holding means, and a first step of holding the second holding means with the second holding means interposed therebetween. A third method of observing the connection terminals of the display panel held by the first holding means and the connection holes of the wiring board held by the second holding means, using the observation means arranged on the side opposite to the holding means. And moving at least one of the first and second holding means based on the observation image observed by the observation means using the positioning means, thereby connecting the connection terminal of the display panel to the wiring board. It is obtained to include a fourth step of aligning the connecting holes to each other.
[0013]
In the alignment adjusting device and the alignment adjusting method according to the present invention, the observation unit is located in a region opposite to the first holding unit with the second holding unit interposed therebetween. Accordingly, the distance between the first and second holding means is narrower than when the observation means is located in a region between the first and second holding means. The moving distance of the first or second holding means at the time of connection with the connection hole is reduced.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
First, a configuration of an alignment adjusting device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an external configuration of the alignment adjustment device 100, and FIG. 2 shows a plan configuration of the alignment device 100 shown in FIG. FIG. 2 shows only main components of the alignment apparatus 100 shown in FIG. Note that, in the following, constituent elements to which (“”) is attached indicate that the constituent elements correspond to the elements with the names in (“)” described in the claims of the present invention. I have.
[0016]
The alignment adjustment device 100 is used in, for example, a manufacturing process of an organic EL display including a display panel and an FPC (“wiring board”), and includes a plurality of electrode terminals (“connection terminals”) provided on the display panel. ) And a plurality of through holes (“connection holes”) provided in the FPC.
[0017]
The alignment adjustment device 100 includes a positioning mechanism 10 and a monitor 50 installed on the base 1, and an operation panel 60 adjacent to the base 1.
[0018]
The positioning mechanism 10 performs a positioning operation between the electrode terminal and the through hole using the display panel and the FPC. The display panel mounting mechanism 20 for mounting the display panel, and the FPC for mounting the FPC. A mounting mechanism 30 (“positioning means”) and an observation mechanism 40 (“observing means”) for observing the electrode terminals and through holes are provided.
[0019]
The display panel mounting mechanism 20 includes, for example, a coarse movement two-axis stage 21, a fine movement two-axis stage 22, a rotation stage 23, and a display panel stage 24 ("first holding means") stacked in this order. , Are connected to each other.
[0020]
The coarse movement biaxial stage 21 moves the display panel stage 24 at a large moving pitch in two axial directions of the X axis and the Y axis in the drawing.
[0021]
The fine movement two-axis stage 22 moves the display panel stage 24 at a smaller pitch than the coarse movement two-axis stage 21 in two X-axis and Y-axis directions.
[0022]
The rotation stage 23 rotates the display panel stage 24 about an axis S in the drawing.
[0023]
The display panel stage 24 is a plate-shaped member on which the display panel is mounted, and includes, for example, a suction chuck (not shown) for suction-holding the display panel.
[0024]
The FPC mounting mechanism 30 is, for example, from a top plate 32 supported by two columns 31 via a four-degree-of-freedom actuator 33 and a frame 34 so as to face the display panel stage 24 (“first 2) are suspended.
[0025]
The four-degree-of-freedom actuator 33 moves the FPC stage 35 in three directions of the X axis, the Y axis, and the Z axis, and rotates the FPC stage 35 about the axis S.
[0026]
The frame 34 connects the four-degree-of-freedom actuator 33 to the FPC stage 35, and transmits the operation of the four-degree-of-freedom actuator 33 to the FPC stage 35.
[0027]
The FPC stage 35 is a plate-shaped member on which the FPC is mounted. The FPC stage 35 is for indirectly holding, for example, an FPC mounted on blocks 70X and 70Y ("holding tool"; see FIG. 3) described later, and is for sucking and holding the blocks 70X and 70Y. It is configured to include a suction chuck (not shown).
[0028]
The observation mechanism 40 includes, for example, three CCD cameras 42A (“first observation means”) and 42B (“second observation means”) from the top plate 32 (“supporting means”) via the fine movement three-axis actuator 41. , 42C are suspended from each other.
[0029]
The fine movement three-axis actuator 41 moves the CCD cameras 42A, 42B, and 42C at relatively small movement pitches in three directions of the X axis, the Y axis, and the Z axis.
[0030]
The CCD cameras 42A, 42B, and 42C are for observing the display panel through the FPC mounted on the FPC stage 35, and can observe both the electrode terminals and the through holes at the same time. These CCD cameras 42A, 42B and 42C are arranged on the opposite side of the display panel stage 24 with the FPC stage 35 interposed therebetween. Each of the CCD cameras 42A, 42B and 42C is, for example, as shown in FIG. At each vertex position of the triangle, the axis S is arranged so as to surround it from three directions. Each of the CCD cameras 42A, 42B, and 42C includes, for example, a macro lens 43 (for example, a high-magnification and small fixed-focus macro lens) and two right-angle deflecting prisms 44, and any two CCD cameras (for example, 42A, 42B) are also smaller than the width L between the two CCD cameras. The interval between the macro lenses 43 can be continuously changed according to a desired observation area width or the like.
[0031]
The monitor 50 displays the electrode terminals and through holes observed by the CCD cameras 42A, 42B, 42C. The monitor 50 can simultaneously display, for example, two observation region images observed by any two of the CCD cameras 42A, 42B, and 42C.
[0032]
The operation panel 60 is used to control the operation of the positioning mechanism 10, and includes various switches and the like.
[0033]
In addition, the alignment adjusting apparatus 100 includes, in addition to the above-described series of components, for example, a pump for allowing a suction chuck or the like provided on the display panel stage 24 or the FPC stage 35 to be suctioned, and a positioning mechanism 10. And a power supply for operating the monitor 50.
[0034]
Next, the configuration of the blocks 70X and 70Y will be described with reference to FIG. FIG. 3 shows an enlarged plan view of the blocks 70X and 70Y.
[0035]
The blocks 70X and 70Y are intermediate mounting members on which FPCs are directly mounted. For example, not only FPCs having a specific planar configuration but also a plurality of types of FPCs having different planar configurations can be mounted.
[0036]
The block 70X is formed, for example, by fixing three block parts 73A, 73B, 73E to a block base 71 using fixing screws 72. These block parts 73A, 73B, 73E have, for example, different plane configurations and are arranged separately, and each block part 73A, 73B, 73E has, for example, a plurality of suction parts for sucking and holding the FPC. A hole 74 is provided. FIG. 3 shows, for example, a case in which eight, four, and three suction holes 74 are provided in the block parts 73A, 73B, and 73E, respectively. For example, the block part 73B can be slid in a direction approaching or away from the block part 73A, and the interval between the block parts 73A, 73B can be freely adjusted. Further, for example, the block part 73E is detachable as needed.
[0037]
The block parts 73E have, for example, a thickness (dimensions in a direction perpendicular to the paper surface in the drawing) smaller than the thicknesses of the other block parts 73A and 73B. It has a mechanism to correct the shape. Details regarding the deformation correcting mechanism of the block part 73E will be described later (see FIG. 8).
[0038]
The block 70Y has substantially the same configuration as the block 70X, for example. That is, in the block 70Y, the block parts 73C, 73D, 73F are fixed to the block base 71 using the fixing screws 72, and the block parts 73C, 73D, 73F are provided with the suction holes 74. The block base 73F has a function of correcting the shape of the FPC, for example, like the block part 73E.
[0039]
Next, a configuration of a display panel and an FPC used for an alignment operation using the alignment adjustment device 100 will be described with reference to FIGS. FIG. 4 shows a schematic sectional configuration of the display panel 80 and the FPC 90, and FIG. 5 shows an enlarged plan configuration of the FPC 90. FIG. 6 is a view for explaining a connection arrangement pattern of the FPC 90 to the display panel 80.
[0040]
The display panel 80 constitutes an image display section of an organic EL display. For example, as shown in FIG. 4, a plurality of organic EL light emitting elements 180 are arranged in a matrix on a transparent glass substrate 81. These organic EL elements 180 are embedded in an insulating layer 85. The organic EL light emitting device 180 includes, for example, a transparent electrode 82 made of ITO (indium tin oxide), an organic EL film 83 including a hole injection layer, a hole import layer, a light emitting layer, and the like, and a metal electrode 84 made of copper. Are included in the laminated structure in this order. The transparent electrode 82 and the metal electrode 84 are respectively connected to the transparent electrode terminal 86 and the metal electrode terminal 87 (“connection terminal”) exposed on the insulating layer 85, and both are two-dimensionally arranged at predetermined intervals. Have been.
[0041]
The FPC 90 is a wiring member connected to the back surface of the display panel 80, and is divided into a plurality of pieces so as to have a plurality of different planar configurations. In the FPC 90, as shown in FIG. 4, a plurality of through holes 93 for terminal connection are formed two-dimensionally at predetermined intervals at locations corresponding to the transparent electrode terminals 86 and the metal electrode terminals 87 of the display panel 80. The inner diameter of the through hole 93 is, for example, equal to or slightly larger than the diameter of the transparent electrode terminal 86 or the metal electrode terminal 87. The FPC 90 has, for example, a bifurcated planar configuration as shown in FIG. 5, and has one branch-side wiring portion 92X having two connection portions 91A and 91B and two connection portions 91C. , 91D on the other branch side. The plurality of through holes 93 shown in FIG. 4 are densely provided for each of the connection portions 91A to 91D.
[0042]
The number of through holes 93 provided in one FPC 90 is determined based on, for example, an arrangement pitch error of the transparent electrode terminals 86 (or the metal electrode terminals 87) and an arrangement pitch error of the through holes 93. That is, for example, when considering a plurality of transparent electrode terminals 86 and a plurality of through holes 93 which are linearly arranged, the arrangement number of the through holes 93 is n, and the arrangement pitch error rate of the through holes 93 produced in production is Ke. When the arrangement pitch of the transparent electrode terminals 86 is P and the allowable error that allows the transparent electrode terminals 86 and the through holes 93 to be aligned with each other is Ea, there is a relationship of the following equation (α) between these parameters.
[0043]
Ea ≧ Ke × P × n (α)
[0044]
Based on the relational expression (α), the arrangement number n of the through-holes 93 may satisfy the following expression (β) so that the transparent electrode terminal 86 and the through-hole 93 can be aligned with each other.
[0045]
n ≦ Ea / (Ke × P) (β)
[0046]
The organic EL display including the display panel 80 and the FPC 90 corresponds to, for example, a large display screen. That is, in this organic EL display, for example, a plurality of FPCs 90 are connected to the back surface of one display panel 80. The reason that a plurality of FPCs 90 are connected to one display panel 80 is mainly because of a problem that occurs when the FPC 90 is enlarged, for example, due to a long wiring, the operation of the organic EL display. This prevents a voltage drop from occurring at times. Even when the size of the display panel 80 is increased, by adding the FPC 90 according to the size of the display panel 80, a display screen of a desired size can be configured while preventing a voltage drop. The organic EL display includes, for example, a drive circuit board (not shown) for outputting a display signal corresponding to a display image, in addition to the display panel 80 and the FPC 90. The FPC 90 and the drive circuit board may be separate from each other, or may be connected to each other to form an integral body.
[0047]
The display panel 80 is divided into a plurality of panel areas R1 to R16 defined based on the connection arrangement pattern of the FPC 90, for example, as shown in FIG. One FPC 90 is connected to the back surface of the display panel 80 for every four panel areas (R1 to R4, R5 to R8, R9 to R12, R13 to R16), that is, four FPCs 90 are connected as a whole. It has become so. FIG. 6 shows a state where the FPC 90 is connected to only the panel areas R1 to R4, for example. FIG. 6 shows a state in which the FPC 90 is connected to the display panel 80. Therefore, the front and back of the FPC 90 are reversed from the state shown in FIG.
[0048]
Next, an alignment adjustment method using the alignment adjustment device 100 will be described with reference to FIGS. FIG. 7 illustrates a procedure of mounting the FPC 90 on the blocks 70X and 70Y, and FIG. 8 illustrates a shape correcting mechanism of the FPC 90 by the blocks 70X and 70Y, and is taken along the line AA shown in FIG. The cross-sectional configuration as viewed from the arrow is shown. FIG. 9 schematically shows an example of an observation image observed by the CCD cameras 42A and 42B. 10 to 12 illustrate a procedure for aligning the transparent electrode terminal 86 and the through hole 93, and FIG. 13 illustrates a procedure for connecting the display panel 80 and the FPC 90. 4 is supported. 10 to 12, the transparent electrode terminals 86 and the through holes 93 are schematically shown in only one row.
[0049]
When performing a positioning operation using the alignment adjustment device 100, preparations are made before performing the positioning operation.
[0050]
That is, first, the display panel 80 is mounted on the display panel stage 24 by suctioning the display panel 80 using a suction chuck so that the transparent electrode terminals 86 and the metal electrode terminals 87 face upward. Subsequently, as shown in FIG. 7, the FPC 90 is mounted on the blocks 70X and 70Y by sucking the FPC 90 using the suction holes 74. When mounting the FPC 90, for example, the wiring portion 92X is mounted on the block 70X so that the connection portions 91A and 91B are aligned with the block parts 73A and 73B, respectively, and the connection portions 91C and 73C are mounted on the block parts 73C and 73D. The wiring section 92Y is mounted on the block 70Y so that the positions of the wirings 91D are adjusted. Note that the one end area T1 and the other end area T2 shown in FIG. 7 indicate the areas to be observed by the CCD cameras 42A and 42B during the alignment work.
[0051]
When the wiring portion 92Y is mounted on the block 70Y, for example, as shown in FIG. 8, a portion 92YP of the wiring portion 92Y corresponding to the area between the block parts 73C and 73D is caused by, for example, warpage or bending. When the wiring portion 92Y is partially convexly deformed (see the broken line in the drawing), the portion 92YP is selectively sucked using the suction hole 74 provided in the block part 73F. Thereby, the wiring portion 92Y is partially deformed into a concave shape.
[0052]
Finally, the blocks 70X, 70Y are sucked using a suction chuck, so that the display panel 80 mounted on the display panel stage 24 and the FPC 90 face the lower surface of the FPC stage 35, so that the blocks 70X, 70Y face each other. Attach 70Y. At this time, for example, in order to temporarily fix the FPC 90 to the display panel 80 in a later process, as shown in FIG. 4, an adhesive 110 is applied to the surface of the FPC 90 in advance.
[0053]
After the preparation is completed, first, one end region T1 of the group of through holes 93 provided in the connecting portion 91B of the FPC 90 can be observed by the CCD camera 42A using the fine movement triaxial actuator 41, and the one end region The CCD cameras 42A and 42B are moved so that the other end region T2 of the group of through holes 93 provided in the connection portion 91C farthest from T1 can be observed by the CCD camera 42B. Thereby, for example, as shown in FIG. 9, on the monitor screen 51 of the monitor 50, an image of one end region T1 observed by the CCD camera 42A is displayed on the right screen 51R, and on the left screen 51L. The image of the other end region T2 observed by the CCD camera 42B is displayed.
[0054]
In this state, the plurality of transparent electrode terminals 86 and the plurality of through holes 93 have an arrangement pitch accuracy that can be aligned with each other, and, for example, as shown in FIG. 10, a group of transparent electrode terminals 86 (86A, 86B. ··· line 86 connecting the through holes 93 (93A, 93B... 93Y, 93Z) to the line N1 connecting the 86Y, 86Z). The transparent electrode terminal 86A (“first connection terminal”) is located at the farthest end on one end side of the plurality of transparent electrode terminals 86 provided on the display panel 80, and is located on the one end side on the one end side. It is located one inward from the end, is located at the farthest end on the other end side with the transparent electrode terminal 86Z (“the second connection terminal”), and is located closer to the other end side with the transparent electrode terminal 86Y. It is located one inside. Similarly, the through hole 93A (“first connection hole”) is located at the end of one end of the plurality of through holes 93 provided in the connection portion 91B, and the through hole 93B is located at the end of the one end. Are located on the inner side, and the through hole 93Z (“second connection hole”) is located at the other end of the plurality of through holes 93 provided in the connection portion 91C, and the through hole 93Z The hole 93Y is located one inner side from the other end on the other end side.
[0055]
Subsequently, the display panel 80 is moved together with the display panel stage 24 by using the coarse movement two-axis stage 21 and the fine movement two-axis stage 22, thereby obtaining the reference position P corresponding to the axis S as shown in FIG. Is located at the end of the transparent electrode terminal 86A at one end.
[0056]
Subsequently, the FPC 90 is moved together with the FPC stage 35 by using the moving mechanism (the X-axis direction and the Y-axis direction) of the four-degree-of-freedom actuator 33, as shown in FIG. The position of the through hole 93H at the end on one end side is matched with the position of the electrode terminal 86A. Thereby, only the transparent electrode terminal 86A and the through hole 93A are aligned, and the other transparent electrode terminals 86B, 86Y, 86Z and the other through holes 93B, 93Y, 93Z are not yet aligned.
[0057]
Subsequently, by rotating the FPC 90 together with the FPC stage 35 using the rotation mechanism of the four-degree-of-freedom actuator 33, the other end is moved to the position of the transparent electrode terminal 86Z at the other end side as shown in FIG. The position of the through-hole 93Z at the terminal end on the side is matched. Thus, the positions of the through holes 93B, 93Y, and 93Z match the positions of the remaining transparent electrode terminals 86B, 86Y, and 86Z, and the positions of the plurality of through holes 93 match the positions of the plurality of metal electrode terminals 87. Will be done.
[0058]
Finally, the FPC stage 35 is moved toward the display panel stage 24 by using the moving mechanism (Z-axis direction) of the four-degree-of-freedom actuator 33, as shown in FIG. 6 and FIG. The FPC 90 is temporarily connected to the display panel 80 via the adhesive 110. In this state, the transparent electrode terminal 86 and the metal electrode terminal 87 are inserted into the through holes 93, respectively. Thus, the work of aligning the plurality of transparent electrode terminals 86 and the plurality of metal electrode terminals 87 with the plurality of through holes 93 is completed.
[0059]
Thereafter, for example, as shown in FIG. 13, a solder ball 120 is put into the through hole 93, and the solder ball 120 is heated and melted by a laser or the like, so that the transparent electrode terminal is inserted into the through hole 93 via solder. 86 and the metal electrode terminal 87 are respectively bonded. Thus, the FPC 90 is permanently connected to the display panel 80.
[0060]
As described above, according to the alignment adjusting apparatus 100 and the alignment adjusting method using the same according to the present embodiment, the CCD cameras 42A and 42B are disposed on the opposite side of the FPC stage 35 from the display panel stage 24. The arrangement allows the transparent electrode terminal 86 and the metal electrode terminal 87 to be aligned with the through-hole 93 with high precision for the following reasons.
[0061]
That is, in the conventional alignment adjusting device, as described in the section of “Prior Art” above, since the CCD camera is located between the display panel stage and the FPC stage (observation position), the display panel stage It is necessary to secure an arrangement space for the CCD camera between the FPC stage and the FPC stage. As a result, the display panel stage and the FPC stage are separated from each other with a relatively large space capable of securing an arrangement space for the CCD camera. In this case, for example, the movement axis of the FPC stage that moves toward the display panel stage to connect the FPC to the display panel is shifted from the normal movement axis that can properly align the electrode terminals and the through holes. If the FPC stage moves, even if the position of the electrode terminal and the position of the through-hole are accurately matched using a CCD camera before the movement of the FPC stage, the electrode moves with the movement of the FPC stage. Since the positional relationship between the terminal and the through hole is deviated, sufficient alignment accuracy cannot be obtained. The amount of displacement due to the movement of the FPC stage mainly increases and decreases according to the movement distance of the FPC stage, that is, the distance between the display panel stage and the FPC stage.
[0062]
On the other hand, in the present embodiment, since the CCD cameras 42A and 42B are arranged on the opposite side of the display panel stage 24 with the FPC stage 35 interposed therebetween, unlike the conventional case, the display panel stage is different. There is no need to secure a space for arranging the CCD cameras 42A and 42B between the FPC 24 and the FPC stage 35. In this case, the distance between the display panel stage 24 and the FPC stage 35 is made relatively small, thereby making it possible to reduce the moving distance of the FPC stage 35. The displacement between the transparent electrode terminal 86 and the metal electrode terminal 87 and the through hole 93 caused by the movement of the through hole 93 is smaller than in the conventional case. Therefore, the transparent electrode terminal 86 and the metal electrode terminal 87 can be aligned with the through hole 93 with high accuracy.
[0063]
Further, in the present embodiment, the moving space of the FPC stage 35 can be reduced based on the shortening of the moving distance of the FPC stage 35, so that the apparatus can be made smaller and the cost can be reduced as compared with the conventional case. Can be planned. The cost reduction of this apparatus is based not only on the shortening of the moving distance of the FPC stage 35 described above, but also, for example, in place of (1) an expensive vertical simultaneous observation type CCD camera having a complicated optical system, Inexpensive one-way observation type CCD cameras 42A and 42B having a simple optical system are used; (2) With respect to CCD cameras 42A and 42B, a moving mechanism for moving from an observation position to a retreat position is not required; 3) Since the alignment marks are not used for the alignment work, there is no need to provide alignment marks on the display panel 80 or the FPC 90, and the display panel 80 and the FPC 90 can be reduced in size by the space where the alignment marks are provided. Is achieved.
[0064]
Further, in the present embodiment, as shown in FIG. 1, since the CCD cameras 42A and 42B are suspended from the top plate 32, the CCD cameras 42A and 42B are extended in the vertical direction (the Z-axis direction in the drawing) by the top plate 32. The CCD cameras 42A and 42B are supported from above so as to be present, and the stationary stability of the CCD cameras 42A and 42B in the vertical direction is ensured. Therefore, for example, as compared with the case where the CCD cameras 42A and 42B are supported from the side so as to extend in the horizontal direction (X-axis direction), the positional deviation of the CCD cameras 42A and 42B due to vertical vibration and the like. Is suppressed, it is possible to prevent defocus during observation.
[0065]
Further, in the present embodiment, the display panel mounting mechanism 20 is configured to include the coarse movement two-axis stage 21 and the fine movement two-axis stage 22, so that, for example, as shown in FIG. When the position of the terminal 86A is made to coincide with the reference position P, both the moving mechanism with a relatively large pitch by the coarse moving biaxial stage 21 and the moving mechanism with a relatively small pitch by the fine moving biaxial stage 22 are used as needed. The display panel stage 24 can be moved more easily and in a shorter time than in a case where only one of the coarse movement two-axis stage 21 and the fine movement two-axis stage 22 is included.
[0066]
Further, in the present embodiment, as shown in FIG. 7, the FPC 90 is mounted on the blocks 70X, 70Y using a suction mechanism with a plurality of suction holes 74, so that a set of blocks 70X, 70Y is A plurality of types of FPCs 90 having different plane configurations can be mounted. Therefore, it is not necessary to prepare blocks in a number corresponding to the type of the FPC 90, and this can contribute to a reduction in the cost of the apparatus.
[0067]
Further, in the present embodiment, as shown in FIGS. 10 to 12, when the positions of the plurality of transparent electrode terminals 86 and the plurality of metal electrode terminals 87 are matched with the positions of the plurality of through holes 93, one end is formed. By moving the FPC stage 35 by using the moving mechanism in the X-axis direction and the Y-axis direction from the state where the position of the transparent electrode terminal 86A at the side of the side is aligned with the reference position P, the terminal at the end of the one end side After the position of the through hole 93A at one end on the one end side is made to coincide with the position of the transparent electrode terminal 86A, the FPC stage 35 is moved by using a rotating mechanism centered on the reference position P (axis S). The position of the through-hole 93Z at the end of the other end is aligned with the position of the transparent electrode terminal 86Z at the end of the other end. In this case, the positions of the plurality of transparent electrode terminals 86 and the plurality of metal electrode terminals 87 are compared with the case where only the moving mechanism in the X-axis direction and the Y-axis direction is used to move the FPC stage 35. And the procedure for matching the positions of the plurality of through holes 93 with each other is simplified. Therefore, the operation time required for the positioning operation can be shortened, and thereby the cost of the positioning process can be reduced. In addition, since the positioning operation can be performed by using a visual observation method using the CCD cameras 42A and 42B without using an expensive image recognition system or the like, the cost of the apparatus can be reduced from this viewpoint. be able to.
[0068]
Further, in the present embodiment, two CCD cameras 42A and 42B including a high-magnification and small fixed-focus macro lens 43 are used. Therefore, unlike the case where one large zoom camera is used, The two observation regions (one end region T1 and the other end region T2) can be easily observed without performing zoom switching, and a plurality of fine through holes 93 close to each other can be observed at a high magnification. Further, the weight of the entire apparatus can be reduced.
[0069]
In the present embodiment, as shown in FIG. 8, when the wiring portion 92Y of the FPC 90 mounted on the block 70Y (block parts 73C and 73D) is partially deformed in a convex shape, Since the wiring portion 92Y is partially deformed into a concave shape by sucking the portion 92YP by using the suction hole 74 provided in the 73F, the wiring that hinders the connection of the FPC 90 to the display panel 80 is formed. The deformed shape of the portion 92Y is corrected. Therefore, the FPC 90 can be normally connected to the display panel 80. Further, even after the FPC 90 is mounted on the block 70Y, the allowable manufacturing error range of the FPC 90 mainly relating to the size of the periphery of the portion 92YP can be expanded based on the end point at which the deformed shape of the wiring portion 92Y can be corrected.
[0070]
Further, in the present embodiment, the FPC 90 provided with a plurality of through holes 93 is used so as to have the number of arrangements satisfying the condition of the above formula (β). Therefore, the transparent electrode terminal 86 and the metal electrode terminal 87 are used. The transparent electrode terminal 86 and the metal electrode terminal 87 can be reliably aligned with the through hole 93 without causing an alignment error due to the displacement of the arrangement position of the through hole 93.
[0071]
In the present embodiment, the CCD cameras 42A and 42B are used for the alignment work. However, the present invention is not limited to this. The display panel 80 mounted on the display panel stage 24 and the FPC stage It is possible to use any two of the plurality of CCD cameras 42A, 42B, 42C in accordance with the mounting direction of the FPC 90 mounted on 35. In any case, the same positioning operation as in the above embodiment can be performed, and the same effect can be obtained.
[0072]
In the present embodiment, in order to match the positions of the plurality of transparent electrode terminals 86 and the plurality of metal electrode terminals 87 with the positions of the plurality of through holes 93, the FPC is performed while the display panel stage 24 is kept stationary. Although the stage for moving 35 is moved, the present invention is not limited to this. For example, the stage for display panel 24 may be moved while the stage for FPC 35 is kept still, or the display panel may be moved. The stage 24 for FPC and the stage 35 for FPC may be moved. In any case, the same effect as in the above embodiment can be obtained by using the rotation and movement mechanism of the display panel mounting mechanism 20 or the rotation and movement mechanism of the FPC mounting mechanism 30.
[0073]
As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and can be variously modified. Specifically, the details of the configuration of the alignment adjustment device 100 and the procedure of the alignment adjustment method using the alignment adjustment device 100 are not necessarily limited to those described in the above embodiment. The display panel 80 and the FPC 90 are observed by using the CCD cameras 42A, 42B, and 42C arranged on the opposite side of the display panel stage 24, and a plurality of transparent electrode terminals 86 and a plurality of The position can be freely changed as long as high-accuracy alignment work can be realized by aligning the metal electrode terminal 87 with the plurality of through holes 93.
[0074]
Further, for example, in the above-described embodiment, the case where the present invention is applied to the work of aligning the transparent electrode terminal 86 and the metal electrode terminal 87 of the display panel 80 constituting the organic EL display with the through hole 93 of the FPC 90 has been described. However, the present invention is not limited to this. For example, the present invention may be applied to another display having the same connection mechanism as the display panel 80 and the FPC 90, or the present invention may be applied to other devices other than the display. The invention may be applied. In any case, the same effect as in the above embodiment can be obtained.
[0075]
【The invention's effect】
As described above, according to the alignment adjusting apparatus according to any one of claims 1 to 13 or the alignment adjusting method according to any one of claims 14 to 26, the second aspect is provided. While observing the connection terminals of the display panel and the connection holes of the wiring board using the observation means arranged on the opposite side of the first holding means with the holding means interposed therebetween, the electrode terminals and the connection holes are aligned using the alignment means. , The distance between the first and second holding means is reduced as compared with the case where the observation means is arranged between the first and second holding means. The moving distance of the first or second holding means at the time of connection between the display panel and the wiring board is reduced. Therefore, for example, even if the moving axis of the first or second holding means is displaced from the normal moving axis capable of properly aligning the connection terminal and the connection hole, the amount of displacement caused by the movement becomes smaller. Therefore, the connection terminal and the connection hole can be positioned with high accuracy. In addition, the moving space of the first or second holding means can be reduced based on the shortened moving distance, so that the size and cost of the device can be reduced.
[0076]
Further, according to the alignment adjusting device of the fourth aspect or the alignment adjusting method of the seventeenth aspect, the position of the first connection terminal is shifted from the state where the first connection terminal is positioned at the reference position by using the moving mechanism. And the position of the first connection hole, and the position of the second connection terminal and the position of the second connection hole using a rotation mechanism centered on the reference position. The first connection terminal is inserted through the first connection hole by using the first connection hole, and the second connection terminal is inserted through the second connection hole. The procedure for matching the positions of the plurality of connection terminals and the positions of the plurality of connection holes is simplified. Therefore, the work time required for the positioning operation can be reduced, and the cost of the positioning process can be reduced.
[0077]
According to the alignment adjusting device of the tenth aspect or the alignment adjusting method of the twenty-third aspect, the observation means is suspended using the support means, so that the observation means is supported from above by the support means. The stationary stability of the observation means in the vertical direction is ensured. Therefore, for example, as compared with the case where the observation unit is supported from the horizontal direction, the displacement of the observation unit due to the vertical vibration or the like is prevented, so that the defocus during observation can be prevented.
[0078]
Further, according to the alignment adjusting device of the twelfth aspect or the alignment adjusting method of the twenty-fifth aspect, the wiring substrate is corrected by utilizing a shape correcting mechanism of the holder and sucking a deformed portion of the wiring substrate. Accordingly, the deformed shape of the wiring board, which hinders the connection between the display panel and the wiring board, is corrected. Therefore, the display panel and the wiring board can be normally connected.
[0079]
According to the alignment adjusting device of the thirteenth aspect or the alignment adjusting method of the twenty-sixth aspect, the arrangement pitch error between the connection terminals and the arrangement pitch error between the connection holes position the connection terminals and the connection holes. The number of connection holes provided is such that the number of connection holes is within the allowable error range necessary for alignment, so that misalignment due to misalignment of connection terminals and connection holes does not occur. Thus, the connection terminal and the connection hole can be reliably aligned.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an external configuration of an alignment adjustment device according to an embodiment of the present invention.
FIG. 2 is a plan view illustrating a planar configuration of the alignment adjustment device illustrated in FIG.
FIG. 3 is an enlarged plan view illustrating a planar configuration of a block.
FIG. 4 is a cross-sectional view illustrating a schematic cross-sectional configuration of a display panel and an FPC.
FIG. 5 is an enlarged plan view illustrating a planar configuration of the FPC.
FIG. 6 is a diagram for explaining a connection arrangement pattern of an FPC to a display panel.
FIG. 7 is a diagram illustrating a procedure for mounting an FPC on a block.
FIG. 8 is a cross-sectional view for explaining an FPC shape correcting mechanism using blocks.
FIG. 9 is a diagram schematically illustrating an observation image displayed on a monitor during a positioning operation.
FIG. 10 is a diagram for explaining a procedure for positioning a transparent electrode terminal and a through hole.
FIG. 11 is a diagram for explaining a procedure following FIG. 10;
FIG. 12 is a diagram illustrating a procedure following FIG. 11;
FIG. 13 is a diagram illustrating a connection procedure between a display panel and an FPC.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base, 10 ... Positioning mechanism, 20 ... Display panel mounting mechanism, 21 ... Coarse movement 2 axis stage, 22 ... Fine movement 2 axis stage, 23 ... Rotation stage, 24 ... Display panel stage, 30 ... FPC mounting mechanism, 31 ... column, 32 ... top plate, 33 ... 4 degrees of freedom actuator, 34 ... frame, 35 ... FPC stage, 40 ... observation mechanism, 41 ... fine movement 3-axis actuator, 42A, 42B, 42C ... CCD camera, 43 ... fixed Focus macro lens, 44 ... 2 right angle deflection prism, 50 ... Monitor, 60 ... Operation panel, 70X, 70Y ... Block, 71 ... Block base, 72 ... Fixing screw, 73A-73F ... Block parts, 74 ... Suction hole, 80 ... Display panel, 81: glass substrate, 82: transparent electrode, 83: organic EL film, 84: metal electrode, 86 (86A, 86B, 86) , 86Z) ... transparent electrode terminal, 87 ... metal electrode terminal, 90 ... FPC, 91A to 91D ... connection part, 92X, 92Y ... wiring part, 93 (93A, 93B, 93Y, 93Z) ... through hole, 110 ... adhesive , 120: solder ball, 180: organic EL element, P: reference position, R1 to R16: panel area, S: axis.

Claims (26)

An alignment adjustment device used to align a connection terminal provided on a display panel and a connection hole provided on a wiring board with each other,
First holding means for holding the display panel;
Second holding means for holding the wiring board so as to face the display panel held by the first holding means;
The connection terminal of the display panel, which is arranged on the opposite side of the first holding means with the second holding means therebetween, and which is held by the second holding means, and the connection terminal of the display panel held by the first holding means. Observation means for observing the connection hole of the wiring board,
A position where the connection terminal of the display panel and the connection hole of the wiring board are aligned with each other by moving at least one of the first and second holding units based on the observation image observed by the observation unit. What is claimed is: 1. An alignment adjusting device, comprising: alignment means. 2. The alignment adjusting device according to claim 1, wherein the observation unit observes the connection terminal through the wiring board. The positioning means,
A moving mechanism for moving at least one of the first or second holding means in two directions orthogonal to each other;
2. The alignment adjustment device according to claim 1, further comprising: a rotation mechanism configured to rotate at least one of the first and second holding units in a plane including the two directions. The connection terminal includes first and second connection terminals, and the connection hole includes first and second connection holes,
The positioning means,
By moving at least one of the first and second holding means using the moving mechanism, the position of the first connection terminal is made to coincide with a reference position, and the first connection terminal located at the reference position is moved. The position of the connection terminal and the position of the first connection hole are matched with each other;
By rotating at least one of the first and second holding means around the reference position using the rotation mechanism, the position of the second connection terminal and the position of the second connection hole are changed. Match each other,
By moving at least one of the first or second holding means using the moving mechanism, the first connection terminal is inserted through the first connection hole, and the second connection hole is inserted into the first connection hole. 4. The alignment adjusting device according to claim 3, wherein the second connection terminal is inserted. The first connection terminal is located at the end of one end of the plurality of connection terminals provided on the display panel, and the second connection terminal is located at the end of the other end,
The first connection hole is located at one end of the plurality of connection holes provided in the wiring board, and the second connection hole is located at the other end of the other end. 5. The alignment adjusting device according to claim 4, wherein: The observation means includes:
First observation means for observing the first connection terminal and the first connection hole;
6. The alignment adjusting device according to claim 5, further comprising a second observation unit for observing the second connection terminal and the second connection hole. Each of the first and second observation means includes a macro lens and two right-angle deflecting prisms,
7. The alignment adjusting apparatus according to claim 6, wherein the width of each of the observation areas observed by the first and second observation units is equal to or smaller than the width of each observation unit. The alignment adjusting device according to claim 7, wherein the macro lens is a fixed focus macro lens. 9. The alignment adjusting device according to claim 8, wherein the distance between the fixed focus macro lenses can be changed continuously. further,
2. The alignment adjusting device according to claim 1, further comprising a support unit for supporting the observation unit so as to hang the observation unit. The wiring board is directly held by a holder,
2. The alignment adjustment device according to claim 1, wherein the second holding unit indirectly holds the wiring board together with the holding tool. 12. The alignment adjusting device according to claim 11, wherein the holder has a shape correcting mechanism for correcting a shape of the wiring board by sucking a deformed portion of the wiring board. The connection terminals and the connection holes are both arranged at predetermined intervals, and the wiring board corresponding to one display panel is divided into two or more,
In each wiring board, the number specified such that the pitch error between the connection terminals and the pitch error between the connection holes are within an allowable error range necessary for aligning the connection terminals and the connection holes. 2. The alignment adjusting device according to claim 1, wherein the connecting holes are provided. An alignment adjustment method for aligning a connection terminal provided on a display panel and a connection hole provided on a wiring board with each other,
A first step of holding the display panel using first holding means;
A second step of using the second holding unit to hold the wiring substrate so as to face the display panel held by the first holding unit;
A connection terminal of the display panel held by the first holding unit and the second holding unit using an observation unit arranged on the opposite side of the first holding unit across the second holding unit. A third step of observing the connection hole of the wiring board held by the means;
By moving at least one of the first and second holding means based on the observation image observed by the observation means using a positioning means, a connection terminal of the display panel and a connection hole of the wiring board are moved. And a fourth step of aligning the positions with each other. 15. The alignment adjusting method according to claim 14, wherein in the third step, the connection terminal is observed through the wiring board. In the fourth step,
As the positioning means,
A moving mechanism for moving at least one of the first or second holding means in two directions orthogonal to each other;
15. The alignment adjustment method according to claim 14, wherein a rotation mechanism for rotating at least one of the first and second holding units in a plane including the two directions is used. The connection terminal includes first and second connection terminals, and the connection hole includes first and second connection holes.
The fourth step is
Using the moving mechanism to move at least one of the first or second holding means to match the position of the first connection terminal with a reference position;
By moving at least one of the first or second holding means using the moving mechanism, the position of the first connection terminal and the position of the first connection hole located at the reference position can be changed. Matching with each other;
By rotating at least one of the first and second holding means around the reference position using the rotation mechanism, the position of the second connection terminal and the position of the second connection hole are changed. Matching with each other;
By moving at least one of the first or second holding means using the moving mechanism, the first connection terminal is inserted through the first connection hole, and the second connection hole is inserted into the first connection hole. 17. The method according to claim 16, further comprising the step of inserting the second connection terminal. The first connection terminal is located at one end of the plurality of connection terminals provided on the display panel, and the second connection terminal is located at the other end of the display panel,
The first connection hole is located at the end of one of the plurality of connection holes provided in the wiring board, and the second connection hole is located at the end of the other end. 18. The method according to claim 17, wherein the alignment is adjusted. In the third step,
As the observation means,
First observation means for observing the first connection terminal and the first connection hole;
19. The alignment adjustment method according to claim 18, wherein a device including the second connection terminal and second observation means for observing the second connection hole is used. As the first and second observation means, those each including a macro lens and two right-angle deflecting prisms are used,
20. The alignment adjusting method according to claim 19, wherein the width of each of the observation areas observed by the first and second observation units is equal to or smaller than the width of each observation unit. 21. The alignment adjusting method according to claim 20, wherein a fixed focus macro lens is used as the macro lens. 22. The alignment adjusting method according to claim 21, wherein an interval between the fixed focus macro lenses can be continuously changed. 15. The alignment adjusting method according to claim 14, wherein the observation unit is supported so as to be suspended using a support unit. Directly holding the wiring board using a holder,
15. The alignment adjustment method according to claim 14, wherein, in the second step, the wiring board is indirectly held together with the holder using the second holding means. As the holder,
25. The alignment adjusting method according to claim 24, wherein a device having a shape correcting mechanism for correcting the shape of the wiring board by sucking a deformed portion of the wiring board is used. All of the connection terminals and the connection holes are arranged at predetermined intervals, and the wiring substrate corresponding to one display panel is divided into two or more,
As the wiring board, the pitch error between the connection terminals and the pitch error between the connection holes are the number specified so that the pitch error between the connection terminals and the connection holes is within an allowable error range required for aligning the connection terminals and the connection holes. 15. The alignment adjustment method according to claim 14, wherein a connection hole is provided in each wiring board.

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