JP3505948B2 - Display panel assembly method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a display panel such as a plasma panel by pressing a connector such as an FPC bonded to a substrate in advance. is there. 2. Description of the Related Art A display panel such as a plasma panel or a liquid crystal panel used as a display of an electronic device includes a substrate on which a chip serving as a driver is mounted at an edge of a substrate such as a glass substrate serving as a display screen. Assembled by connecting via connectors. Hereinafter, a conventional display panel will be described with reference to the drawings. FIG. 19 is a plan view of a display panel. FIG.
In 9, reference numeral 1 denotes a display panel such as a plasma panel, and a plurality of terminal rows 1 a are formed at an edge thereof.
The terminal row 1a is composed of a large number of terminals 30 having a narrow pitch. Reference numeral 2 denotes a substrate on which a driver 2a such as a chip for driving the display panel 1 is mounted. A plurality of connectors 3 are adhered to the substrate 2. As the connectors 3, those in which a number of leads 33 are printed on a flexible resin film are frequently used. In a plasma panel or the like, as shown in FIG. 19, after bonding one end of a plurality of (three in this example) connectors to the substrate 4, the leads 33 at the other end of the connector 3 are connected to the display panel 1. The terminal 30 is bonded to the display panel 1 after being positioned. Since the pitch of the terminals 30 of the display panel 1 is becoming narrower with the increase in the degree of integration of electronic components, the terminals 30 and the leads 33 of the connector 3 must be connected to each other. When connecting, especially the terminal 30
, High position accuracy is required in the arrangement direction. However, as shown in FIG.
When bonding is performed in advance, it is inevitable that a certain degree of variation occurs in the mounting pitch P between the connectors 3 after bonding. Therefore, a plurality of connectors 3
When aligning the substrate 2 to which the substrates 3 are adhered to the display panel 1, first, one connector 3 is connected to the corresponding terminal row 1a.
In many cases, misalignment occurs between the other connector 3 and the terminal row 1a. This displacement can be absorbed by slightly bending the connector 3. However, since the work of correcting this displacement is a delicate operation requiring high accuracy, conventionally, such a display panel has been conventionally used. Is performed manually, and a technique for efficiently automating the assembling operation requiring this accuracy has not been established. Accordingly, an object of the present invention is to provide a method of assembling a display panel capable of efficiently and highly accurately crimping a plurality of connectors previously bonded to a substrate to a display panel such as a plasma panel. According to the present invention, there is provided a display panel assembling method, comprising: a support table for supporting a display panel; and a holding head for holding a substrate to which a plurality of flexible connectors are bonded in advance. , the supported display panel on the support table
Align the connector with the terminal row on the edge and display panel
A bonding head having a compression tool for crimping Le, a camera for imaging the alignment marks of the alignment mark and the connector of the display panel, and a recognition unit for recognizing position of the alignment mark receives image data from the camera, the A control unit for controlling the driving of a moving mechanism for horizontally moving the holding head relative to the display panel supported by the support table based on the recognition result of the recognition unit; Wherein the alignment mark of the connector and the alignment mark of the display panel are imaged by the camera, and the positions of these alignment marks are detected from the imaged image data. Detects the displacement of the corresponding display panel, and first After correcting the positional displacement of the first connector by relatively moving the first connector horizontally, the first connector is pressed against the display panel by the pressure bonding head and bonded, and the second and subsequent connectors are bonded. For the connector, the connector that has already been bonded to the display panel is bent and the connector is horizontally moved relative to the display panel to correct the positional deviation, and the connector is crimped to the display panel by the crimping head. I tried to bond. According to the present invention having the above-described structure, a position difference between a connector and a display panel is detected by recognizing respective alignment marks of the connector and the display panel with a camera. First, the first connector is aligned with the display panel, and then pressed and bonded. The second and subsequent connectors are positioned by bending and crimping the already-bonded connectors, and bonded by crimping, so that positional displacement can be absorbed by bending of the connectors, and each connector can be crimped to the display panel accurately and efficiently. be able to. (Embodiment 1) FIG. 1 is a perspective view of a display panel assembling apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a block diagram of a control system of the display panel assembling apparatus. 4,
5, 6, 7, 8, and 9 are partial plan views of the display panel. First, the overall structure of a display panel assembling apparatus will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a display panel, which is supported on a support table 4. Reference numeral 2 denotes a substrate on which a driver 2a is mounted in advance, and three connectors 3 for connection to the display panel 1 are bonded.
The lower surface of the substrate 2 is supported by a belt-shaped support 6, and is positioned by a holding head 10.
The holding head 10 is connected to the θ table 13 via the arm 11.
Is connected to the rotating shaft 12. The .theta. Table 13 is moved to any position within the movable range by moving means in the X, Y and Z directions (not shown). table 13, X direction (not shown), Y
By driving the moving means in the direction and the Z direction, the substrate 2 held by the holding head 10 is aligned with the display panel 1. That is, the means for moving the θ table 13 in the X direction, the Y direction, and the Z direction (not shown) is a positioning mechanism 14 of the holding head 10. A backup member 5 is provided at an end of the support table 4. The backup member 5
When the connector 3 is crimped, it supports the end of the display panel 1 and receives a crimping load. The backup member 5 is made of a transparent body, and through this transparent body, an alignment mark of the display panel 1 can be imaged by a camera described later. Above the support table 4, a pressing head moving mechanism 15 is provided. Crimping head moving mechanism 15
Is mounted with a crimping head 16. Crimping head 1
6 is provided with three crimping tools 17 corresponding to the number of connectors 3. By driving the crimping head moving mechanism 15, the crimping tool 17 moves to an arbitrary position on the display panel 1 and crimps the connector 3 to the upper surface of the display panel 1 by heat and pressure. An X table 18 is provided below the end of the display panel 1. On the X table 18, a Y table 19 is placed. On the Y table 19,
Two cameras 20a and 20b are mounted. The X table 18 and the Y table 19 constitute a moving mechanism 21 for the cameras 20a and 20b. By driving the moving mechanism 21, the cameras 20 a and 20 b move to an arbitrary position below a connection portion between the display panel 1 and the connector 3, and an alignment mark on both sides of the connector 3 described later and a terminal row of the display panel 1. Of the alignment marks on both sides of.
In this case, since the backup member 5 is made of a transparent material, it does not hinder the imaging of the cameras 20a and 20b. Next, the configuration of the control system of the display panel assembling apparatus will be described with reference to FIG. In FIG. 2, reference numeral 22 denotes a control unit that controls the entire control, and performs the following commands and controls for each unit. A command to hold and release the substrate 2 is issued to the substrate holding head 10, and a command to align the holding head 10 is issued to the positioning mechanism 14. A command to move the crimping tool 17 up and down is given to the crimping head 16, and a command to move the crimping head 16 horizontally is given to the crimping head moving mechanism 15. Further, it instructs the camera moving mechanism 21 to move the cameras 20a and 20b horizontally. The recognition unit 23 receives the image data of the alignment mark from the cameras 20a and 20b, performs position recognition, and sends the position data of the alignment mark to the control unit 22. The control unit 22 calculates a correction value required for alignment based on the position data. The display panel assembling apparatus has the above-described configuration, and its operation will be described below. First, in FIG. 1, the display panel 1 is transported by a transport unit (not shown) and is supported on the support table 4. Next, the substrate 2 to which a plurality of connectors 3 have been bonded in advance is supplied by a transporting means (not shown), and is held by the holding head 10. Next, the positioning mechanism 14 is driven to move the connector 3 of the substrate 2 held by the holding head 10 to the vicinity of the terminal row 1a corresponding to the connector 3 of the display panel 1. Next, the positions of the connector 3 and the terminal row 1a are detected. At this time, the connector 3 is connected to the display panel 1
May be overlapped with the end. Hereinafter, a method of detecting this position will be described. In FIG. 3, three terminal rows 1aA, 1aB, and 1aC are formed at an end of the display panel 1. Each terminal row 1aA, 1aB, 1aC is composed of a large number of terminals 30. Each terminal row 1aA, 1aB, 1a
On C, anisotropic conductive tapes (hereinafter abbreviated as “ACF”) 31A, 31B, 31C are attached in advance.
The alignment marks MA1, MA2, MB of the display panel 1 are provided on both sides of each terminal row 1aA, 1aB, 1aC.
1, MB2, MC1, and MC2 are provided. The board 2 has three connectors 3A, 3B, 3
C is joined. Many leads 33 are provided on the lower surfaces of the connectors 3A, 3B, and 3C. Alignment marks mA1, mA2, mB1, mB are provided on both sides of each lead 33 of the connectors 3A, 3B, 3C.
2, mC1 and mC2 are provided. Further, 32A, 32B, and 32C are terminals 1
aA, 1aB, and 1aC represent the center lines;
B and 34C represent the center lines of the connectors 3A, 3B and 3C. That is, MA1 and MA2, MB1 and MB
2. The middle points of MC1 and MC2 are 32A, 32B, respectively.
32C. Similarly, the middle points of mA1 and mA2, mB1 and mB2, and mC1 and mC2 are 34A,
34B and 34C. Therefore, each terminal row 1a
A, 1aB, 1aC, and each corresponding connector 3
A, 3B, 3C X-direction displacements ΔXA, ΔXB, Δ
In order to detect XC, alignment marks MA1,
MA2, MB1, MB2, MC1, MC2 and mA
That is, the positions of 1, mA2, mB1, mB2, mC1, and mC2 may be obtained. First, the camera moving mechanism 21 is driven to sequentially move the cameras 20a, 20b below the terminal rows 1aA, 1aB, 1aC and the connectors 3A, 3B, 3C. And alignment marks MA1, MA2, MB
1, MB2, MC1, MC2 and mA1, mA2, mB
1, mB2, mC1, and mC2 are connected to the cameras 20a and 20b.
, And these image data are sent to the recognizing unit 23, and the alignment marks MA1, MA2, MB
1, MB2, MC1, MC2 and mA1, mA2, mB
The positions of 1, mB2, mC1, and mC2 are detected. Next, each alignment mark MA1, MA2, MB1, MB
2, MC1, MC2 and mA1, mA2, mB1, mB
The position data of 2, mC1, and mC2 are sent to the control unit 22, and the displacements ΔXA, ΔXB, and ΔXC are calculated. Thereafter, a correction value for aligning the first connector 3A with the first terminal row 1aA is supplied to the control unit 2.
2 is calculated. The correction value in this case is ΔXA described above.
It is. Once the correction value is obtained, the positioning mechanism 1
4 to drive the leads 33 of the connectors 3A, 3B, 3C on the terminal rows 1aA, 1aB, 1aC of the display panel 1.
At this time, the substrate 2 is moved in the X direction by ΔXA based on the correction value.
To correct the position. As a result, the center line 34A of the first connector 3A matches the center line 32A of the first terminal row 1aA, and the alignment of the first connector 3A is completed. The control unit 22 calculates a correction value for aligning the second connector 3B with the second terminal row 1aB. FIG. 4 shows a first connector 3A,
This shows a state where the first terminal row 1aA is aligned. As shown in FIG. 4, as a result of the correction performed by ΔXA, the positional deviation between the second connector 3B and the second terminal row 1aB, and the positional deviation between the third connector 3C and the third terminal row 1aC are shown in FIG. 3 from ΔXB and ΔXC, ΔXB−ΔXA, Δ
XC-ΔXA. This ΔXB−ΔXA is
This is a correction value for aligning the second connector 3B with the second terminal row 1aB. Next, the crimping head moving mechanism 15 and the crimping head 16 are driven to press the crimping tool 17 onto the first connector 3A whose alignment has been completed, and crimp the terminal row 1aA. Bold hatched portion 40A in FIG.
Indicates an area where the crimping tool 17 is pressed and crimped. In this case, the process may be performed up to the final pressure bonding, or may be a temporary pressure bonding in which the pressure bonding is interrupted on the way. Next, the second connector 3B is aligned with the second terminal row 1aB. That is, the positioning mechanism 14 is driven to move the substrate 2 in the X direction in the above-described correction value ΔXB−
Move by ΔXA to correct the position. FIG.
The state after alignment of the 2nd connector 3B and 2nd terminal row 1aB is shown. As a result of this alignment, the first connector 3A is forcibly moved in the X direction, and is bent δ.
A is generated and deformation (wrinkles) is generated, but the amount of bending is small, and there is no problem in practical use. The positional deviation between the third connector 3C and the third terminal row 1aC is Δ
XC-ΔXB, which is a correction value for aligning the third connector 3C with the third terminal row 1aC. Next, the crimping head moving mechanism 15 and the crimping head 16 are driven to press the crimping tool 17 onto the second connector 3B whose alignment has been completed, and crimp the terminal row 1aB. The hatched portion 40B indicated by the thick line in FIG.
Indicates an area where the crimping tool 17 is pressed and crimped. Next, the third connector 3C is aligned with the third terminal row 1aC. That is, the positioning mechanism 14 is driven to correct in the X direction by the aforementioned correction value ΔXC−ΔXB. FIG. 8 shows a state after the third connector 3C is aligned with the third terminal row 1aC. As a result of this alignment, the second connector 3B is forcibly set to X
Is caused to bend in the direction δB, but the amount of bending is also slight, which is practically acceptable. Next, the crimping head moving mechanism 15 and the crimping head 16 are driven to press the crimping tool 17 onto the third connector 3C whose alignment has been completed, and crimp it to the terminal row 1aB. Bold hatched portion 40C in FIG.
Indicates an area where the crimping tool 17 is pressed and crimped. As described above, as shown in FIG. 9, the three connectors 3A, 3B, 3C are correctly aligned with the display panel 1 and crimped. In the first embodiment, the first
Before crimping the third connector 3A to the display panel 1, each alignment mark MA1, MA2, MB1, MB2,
MC1, MC2 and mA1, mA2, mB1, mB1,
mB2, mC1, and mC2 are imaged, and each connector 3
A method is adopted in which the positional deviations ΔXA, ΔXB, ΔXC of A, 3B, 3C are collectively calculated in advance. Therefore,
There is an advantage that the processing time can be shortened as compared with the method of calculating the positional shift by performing imaging for each of the connectors 3A, 3B and 3C. (Embodiment 2) FIGS. 10, 11, and 1
2, FIG. 13, FIG. 14, FIG. 15, and FIG. 16 are partial plan views of the display panel according to the second embodiment of the present invention. In the second embodiment, since the same display panel assembling apparatus as that of the first embodiment is used, the description of the common elements of each element and operation is omitted. First, as in the first embodiment, the operation after the state where the display panel 1 and the substrate 2 are supplied will be described. As shown in FIG.
To superimpose the leads 3A, 3B, and 3C on the terminal rows 1aA, 1aB, and 1aC of the display panel 1 and perform temporary alignment. Next, in this state, the alignment marks MA1, MA2 of the first terminal row 1aA and the alignment marks mA1, MA2 of the first connector 3A are provided.
A2 is imaged by the cameras 20a and 20b. As described above, since the backup member 5 is made of a transparent material, it does not hinder imaging. The alignment marks mA1 and mA2 on the connector 3A are formed at positions that can be detected by the cameras 20a and 20b from below even when the connector 3A is overlaid on the display panel. These image data are sent to the recognizing unit 23, and each of the alignment marks MA1, MA2, mA1, m
The position of A2 is detected. Next, the position data of each of the alignment marks MA1, MA2, mA1, and mA2 is sent to the control unit 22, and the displacement ΔXA is calculated. Next, the positioning mechanism 14 is driven to move the substrate 2 in the X direction by ΔXA to correct the position. Thereby, as shown in FIG. 11, the first connector 3A and the first terminal row 1a
A is aligned, and then the crimping head moving mechanism 15 and the crimping head 16 are driven to press the crimping tool 17 on the first connector 3A whose alignment has been completed, and crimp the terminal row 1aA. A thick hatched portion 40A in FIG. 12 indicates a range where the crimping tool 17 is pressed and crimped. In this case, the process may be performed up to the final pressure bonding, or may be a temporary pressure bonding in which the pressure bonding is interrupted on the way. Next, as shown in FIG. 12, the alignment marks MB1, MB2 of the second terminal row 1aB and the alignment marks mB1, m2 of the second connector 3B.
B2 is imaged by the cameras 20a and 20b. These image data are sent to the recognition unit 23, and the positions of the alignment marks MB1, MB2, mB1, and mB2 are detected. Next, each alignment mark MB1, MB2, m
The position data of B1 and mB2 are sent to the control unit 22, and the position shift ΔXB ′ is calculated. Next, the positioning mechanism 14 is driven to move the substrate 2 in the X direction by ΔXB ′. FIG. 13 shows that the second connector 3B is thus connected to the second terminal row 1a.
The state after alignment with B is shown. As a result of this alignment, the first connector 3A is forcibly moved in the X direction to cause a bending δA, but the amount of bending is slight as in the case of the first embodiment, which is practically acceptable. Next, the crimping head moving mechanism 15 and the crimping head 16 are driven to press the crimping tool 17 onto the second connector 3B whose alignment has been completed, and crimp the terminal row 1aB. Bold hatched portion 40A in FIG.
Indicates an area where the crimping tool 17 is pressed and crimped. Next, as shown in FIG.
aC alignment marks MC1, MC2, and second
Alignment mark mC1, mC of the third connector 3C
2 is captured by the cameras 20a and 20b. These image data are sent to the recognizing section 23, and each of the alignment marks MC1, MC2, mC1, m
The position of C2 is detected. Next, the position data of each of the alignment marks MC1, MC2, mC1, and mC2 is sent to the control unit 22, and the position shift ΔXC ′ is calculated. next,
The positioning mechanism 14 is driven to move in the X direction by ΔXC ′. As a result, as shown in FIG. 15, the third connector 3C and the second terminal row 1aC are aligned. In this case, the bending δB occurs in the second connector 3B in the same manner as described above. Next, the crimping head moving mechanism 15 and the crimping head 16 are driven to place the crimping tool 17 on the third connector 3C whose alignment is completed.
And crimped to the terminal row 1aC. The crimping tool 17 is pressed against the thick hatched portion 40A in FIG.
The crimped area is shown. In this way, the three connectors 3A, 3
B and 3C are correctly aligned with the display panel 1 and crimped. In the second embodiment, the connectors 3A, 3B, 3C
Is temporarily aligned with respect to the display panel 1, and the alignment mark MA for the first connector 3A is firstly set.
1, MA2, and mA1 and mA2 are imaged to calculate a position shift ΔXA, and after correcting the position shift ΔXA, press-fit the display panel 1. Since this is a method of detecting a positional shift immediately before the pressure bonding, there is an advantage that the position can be corrected with extremely high accuracy. (Embodiment 3) FIGS. 17 and 18 are partial plan views of a display panel according to Embodiment 3 of the present invention. Also in the third embodiment, since the same display panel assembling apparatus as that of the first embodiment is used, the description of the common elements of each element and operation is omitted. First, similarly to the first embodiment, the operation after the state where the display panel 1 and the substrate 2 are supplied will be described. As shown in FIG.
To move the connectors 3A, 3B, 3C of the substrate 2 to the vicinity of the corresponding terminal rows 1aA, 1aB, 1aC of the display panel 1. In a state where the connectors 3A, 3B and 3C are not overlapped with the corresponding terminal rows 1aA, 1aB and 1aC of the display panel 1, the alignment marks MA1 and MA2 of the first terminal row 1aA and the alignment marks of the first connector 3A are provided. mA1 and mA2 are assigned to the cameras 20a, 2
Image is taken at 0b. These image data are sent to the recognizing unit 23, and the respective alignment marks MA1, MA2, mA
1. The position of mA2 is detected. Next, the position data of each of the alignment marks MA1, MA2, mA1, mA2 is sent to the control unit 22, and the displacement ΔXA is calculated. Next, the positioning mechanism 14 is driven so that the leads 33 of the connectors 3A, 3B and 3C are superimposed on the corresponding terminal rows 1aA, 1aB and 1aC of the display panel 1, and the substrate 2 is moved by .DELTA.XA in the X direction. Let it. As a result of this alignment, as shown in FIG. 18, the first connector 3A is aligned with the first terminal row 1aA. The subsequent operation is the same as that described in the second embodiment with reference to FIG. In the third embodiment, each of the connectors 3A, 3A
The alignment marks MA1 and MA2 of the first connector 3A are the same as in the second embodiment in that the alignment marks are individually imaged before the B and 3C are crimped to the display panel, and the displacement is calculated. , MA1 and mA2 are performed without the connector 3A being superimposed on the display panel 1. According to the present invention, the position difference between the connector and the display panel is detected by recognizing the respective alignment marks of the plurality of connectors and the display panel with a camera. The first connector is aligned with the display panel and then thermocompression bonded. The second and subsequent connectors are positioned by bending the already-bonded connectors and bonded by thermocompression bonding, so that the displacement can be absorbed by the bending of the connectors, and each connector can be accurately and efficiently crimped to the display panel. can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a display panel assembling apparatus according to a first embodiment of the present invention. FIG. 2 is a block diagram of a control system of the display panel assembling apparatus according to the first embodiment of the present invention. 3 is a partial plan view of the display panel according to the first embodiment of the present invention; FIG. 4 is a partial plan view of the display panel according to the first embodiment of the present invention; FIG. 5 is a display panel according to the first embodiment of the present invention; FIG. 6 is a partial plan view of a display panel according to the first embodiment of the present invention. FIG. 7 is a partial plan view of a display panel according to the first embodiment of the present invention. FIG. 8 is an embodiment of the present invention. FIG. 9 is a partial plan view of a display panel according to Embodiment 1 of the present invention. FIG. 10 is a partial plan view of a display panel according to Embodiment 2 of the present invention. FIG. 12 is a partial plan view of a display panel according to Embodiment 2 of the present invention. FIG. 13 is a partial plan view of a display panel according to Embodiment 2 of the present invention. FIG. 14 is a partial plan view of a display panel according to Embodiment 2 of the present invention. FIG. 15 is Embodiment 2 of the present invention. FIG. 16 is a partial plan view of a display panel according to a second embodiment of the present invention. FIG. 17 is a partial plan view of a display panel according to a third embodiment of the present invention. FIG. 19 is a plan view of a conventional display panel. [Description of References] 1 Display panel 1a, 1aA, 1aB, 1aC Terminal row 2 Substrate 3, 3A, 3B, 3C connector 4 Support table 5 Backup member 10 Holding head 14 Alignment mechanism 16 Crimping head 17 Crimping tool 20a, 20b Camera 22 Control unit 23 Recognition unit 33 Lead MA1, MA2, MB1, MB2, MC1, MC2 Alignment Alignment mark mA1, mA2, mB1, mB2, mC1, mC2 alignment mark

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G09F 9/00 G02F 1/1345 G02F 1/13 H05K 1/14

Claims (1)

(57) Claims 1. A support table for supporting a display panel, a holding head for holding a substrate to which a plurality of flexible connectors are bonded in advance, and a support head supported on the support table. Display panel
Align the connector with the terminal row at the edge of
A bonding head having a compression tool for crimping a panel, a camera for imaging the alignment marks of the alignment mark and the connector of the display panel, and a recognition unit for recognizing position of the alignment mark receives image data from the camera, the A control unit for controlling the driving of a moving mechanism for horizontally moving the holding head relative to the display panel supported by the support table based on the recognition result of the recognition unit; Wherein the alignment mark of the connector and the alignment mark of the display panel are imaged by the camera, and the positions of the alignment marks are detected from the imaged image data. Detects the displacement of the corresponding display panel, The first connector is relatively horizontally moved to correct the displacement of the first connector, and then the first connector is crimped to the display panel by the crimping head and bonded to the second connector. For the third and subsequent connectors, the connector that has already been bonded to the display panel is bent and the connector is moved horizontally relative to the display panel to correct the positional shift, and then crimped to the display panel by the crimping head. And assembling the display panel.