JPH10177416A - Method for positioning, manufacture of liquid crystal module and liquid crystal display equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly execute positioning by permitting positioning marks which are respectively provided in first and second works to be in the same visual field together so as to pick-up an image and obtaining the correlative position of the first mark with the second one. SOLUTION: The first positioning marks p1 and p2 are given to a liquid crystal display equipment 10. The second positioning marks q1 and q2 are given to a wiring substrate 11 in positions corresponding to the first positioning marks p1 and p2. Image pickup units 20 and 21 permit the respectively corresponding marks p1, q1 and p2, q2 to be within the same visual field together so as to pick-up an image at one time. An image processor 25 obtains the correlative positions of the marks p1, q1 and p2, q2 from respective kinds of image data which are obtained by the respective image pickup units 20 and 21, generates a movement control signal from the correlative positions and transmits it to an xyΘ table driving part 19. An x-table 16 is moved so as to position the liquid crystal display equipment 10 and the wiring substrate 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning method suitable for positioning each other when, for example, a liquid crystal display is connected to a flexible printed circuit board, a method for manufacturing a liquid crystal module manufactured by this positioning method, and a method for manufacturing the same. The present invention relates to a liquid crystal display having a mark suitable for the positioning method.

[0002]

2. Description of the Related Art Conventionally, for example, a liquid crystal display formed by laminating two glass panels for a liquid crystal display, and a flexible printed wiring board (hereinafter abbreviated as a wiring board) for driving the liquid crystal display. ) To manufacture a liquid crystal module, the liquid crystal display 1 and the wiring board 2 must be accurately positioned as shown in FIG. This is because a large number of ITO (indium and tin oxide) electrode terminals 3 are arranged on the liquid crystal display 1 and a large number of connection terminals 4 are arranged on the wiring board 2 so as to correspond to the ITO electrode terminals 3. This is because, when they are connected, the ITO electrode terminals 3 and the connection terminals 4 must be electrically connected so as not to be shifted from each other. Therefore, high-precision technology is required for positioning the liquid crystal display 1 and the wiring board 2. Therefore, the conventional positioning method generally uses four imaging devices. That is, two of the four imaging devices are arranged at positions where both ends of the liquid crystal display 1 are imaged, and the other two imaging devices are connected to a portion of the wiring board 4 where the liquid crystal display 1 is connected. The two ends are arranged at positions where images are taken. The positions of the ITO electrode terminals 3 at both ends of the liquid crystal display 1 and the ends of the connection terminals 4 of the wiring board 2 are determined from the image data obtained by the imaging devices arranged as described above. The liquid crystal display 1 and the wiring board 2 are moved and positioned by recognizing the position of the terminals 3 and 4 from the recognized positions of these terminals.
However, in the above-described positioning method, the manufacturing cost of the liquid crystal module is expensive because four imaging devices are used, and a positioning method in which the position correction of each imaging device is taken into consideration has to be adopted. Further, in this case, if the arrangement position of each imaging device is shifted due to thermal expansion or the like, even if the position shift between the liquid crystal display 1 and the wiring board 2 is obtained, the value will include an error. In addition, since the liquid crystal display 1 and the wiring board 2 are imaged by different imaging devices, the liquid crystal display 1 and the wiring substrate 2 must be positioned in a state where they are separated according to the arrangement distance of each imaging device. . Therefore,
Even when the liquid crystal display 1 and the wiring board 2 are correctly positioned, the liquid crystal display 1 and the wiring board 2 may be shifted and connected again due to the movement when connecting the liquid crystal display 1 and the wiring board 2.

[0003]

As described above, the conventional positioning method cannot perform accurate positioning.
Even if the positioning was performed correctly, the connection would be displaced again at the time of connection. Therefore, an object of the present invention is to provide a highly reliable positioning method that can be accurately positioned and does not cause a displacement even during connection. It is another object of the present invention to provide a liquid crystal display having a positioning mark used in the positioning method. It is another object of the present invention to provide a manufacturing method for manufacturing a liquid crystal module using this positioning method.

[0004]

To achieve the above object, the present positioning method is a positioning method for positioning a first work and a second work, wherein the first positioning mark provided on the first work is provided. An imaging step of imaging the first positioning mark provided on the second work and the second positioning mark used as a pair together in the same field of view, and the image data obtained by the imaging step, (1) a relative position calculating step of calculating a relative position between the first positioning mark and the second positioning mark, and relative movement of the first work and the second work based on the relative position obtained in the relative position calculating step; And a moving step.

In a positioning method for positioning a first work and a second work, when positioning the first work and the second work, a plurality of first and second works are provided at a plurality of positions on the first work. The predetermined first positioning mark of the one positioning mark and the predetermined first positioning mark of the plurality of second positioning marks provided on the second work and used in pairs with the first positioning mark. An imaging step of taking a pair of predetermined second positioning marks together in the same field of view, and obtaining the predetermined first positioning marks and the predetermined second positioning from image data obtained by the imaging step. A relative position calculating step of obtaining a relative position with respect to the use mark, and the first work and the And a moving step of relatively moving the second work. Further, in a liquid crystal module manufacturing method of manufacturing a liquid crystal module by connecting the liquid crystal display and the wiring board based on positioning the liquid crystal display, the first positioning mark provided on the liquid crystal display and the wiring board are provided. An imaging step of imaging the first positioning mark provided and the second positioning mark used as a pair together in the same field of view, and the first positioning mark and the second positioning mark from the image data obtained in the imaging step. A relative position calculating step of calculating a relative position with respect to a second positioning mark, and a moving step of relatively moving the liquid crystal display and the wiring board based on the relative position obtained in the relative position calculating step, And a connecting step of connecting the liquid crystal display and the wiring substrate positioned by the moving step.

Further, in a method of manufacturing a liquid crystal module in which a liquid crystal display and a wiring board are positioned and connected to each other to manufacture a liquid crystal module, in positioning the liquid crystal display and the wiring board, A predetermined first positioning mark among a plurality of first positioning marks provided at a plurality of locations on the display and a plurality of second positioning marks provided on the wiring board and used together with the first positioning mark. An imaging step of imaging the pair of predetermined second positioning marks together with the predetermined first positioning marks among the positioning marks in the same field of view, and obtaining the predetermined data from the image data obtained by the imaging step. A relative position calculating step of determining a relative position between the first positioning mark and the predetermined second positioning mark;
A moving step of relatively moving the liquid crystal display and the wiring board based on the relative position calculated in the relative position calculating step; and connecting the liquid crystal display and the wiring board positioned in the moving step to each other. Connection step.

Finally, in a liquid crystal display having a plurality of terminals connected to a plurality of terminals formed in parallel with each other on a wiring board, a terminal formed by the plurality of terminals formed on the liquid crystal display A liquid crystal display having positioning marks formed at both ends of a row and at predetermined distances from ends of the liquid crystal display where the terminal row is formed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a positioning device, where 10 is a liquid crystal display as a first work, and 11 is a wiring board as a second work. Further, as shown in FIG. 2, a plurality of terminals are formed at the end of the liquid crystal display 10, and both ends of the terminal row are sandwiched between the terminals and the side connected to the wiring board 11 of the liquid crystal display 10. The first positioning marks p1 and p2 are provided at positions closer to the center of the liquid crystal display 10 by a predetermined distance from the end of the liquid crystal display 10. The liquid crystal display 10 is sucked by a vacuum suction mechanism to a jig base 12 for setting the liquid crystal display 10 at a reference position. On the other hand, the wiring board 11 has the second positioning marks p1 and p2 at positions corresponding to the first positioning marks p1 and p2, respectively.
The positioning marks q1 and q2 are provided, and the wiring board 11 is positioned and mounted on the xy table 13 (moving means) by the pins 14 and 15. The xy table 13 is placed on each of the pins 14 and 15.
Instead, it may be adsorbed by an adsorption mechanism. by the way,
The xy @ table 13 is composed of an x table 16, a y table 17, and a {table 18}.
The table is driven by a table driving unit 19. Now, two imaging devices 20 and 21 are arranged above the jig base 12 and the xy table 13 respectively. These imaging devices 20 and 21 have corresponding first and second positioning marks p1, q1 and p2, q2, respectively.
Are put together in the same field of view, and the images are collectively taken. The image pickup device 20 collectively takes images of the first and second positioning marks p1 and q1 together.
Reference numeral 1 indicates that both p2 and q2 are collectively imaged. The output terminals of these imaging devices 20 and 21 are respectively connected to A / D (analog / digital) converters 22 and 2.
3 and the switching unit 24 are connected to the image memory of the image processing device 25. The image processing device 25 obtains the relative positions of the first and second positioning marks p1, q1, p2, and q2 from each image data obtained by the imaging of the imaging devices 20 and 21, and calculates the liquid crystal display from the relative positions. It has a function of creating a movement control signal for positioning the container 10 and the wiring board 11 and sending it to the xy @ table driving unit 19. The specific configuration is as follows.
That is, an image memory 26 is provided, and the image data is stored in the image memory 26. Further, a main control unit 27 is provided, and an image memory 26, a position calculation unit 28, a relative position calculation unit 29, and a movement control unit 30 (movement control means) are connected to the main control unit 27. Here, the position calculation unit 28 and the relative position calculation unit 29 constitute a relative position calculation unit 31, and the position calculation unit 28 generates a first positioning mark p 1 from each image data of each of the imaging devices 20 and 21. Second positioning mark q
1 and the first positioning mark p
2 and a function of obtaining each position of the second positioning mark q2. Further, the relative position calculation unit 29 determines the positions of the first positioning mark p1 and the second positioning mark q1 and the first positioning mark p2 and the second positioning mark q2 obtained by the position calculation unit 28. From each position, the relative positions of the first positioning marks p1, p2 and the second positioning marks q1, q2, that is, the liquid crystal display 1
It has a function of calculating the amount of misalignment between 0 and the wiring board 11. The movement control unit 30 has a function of creating a movement control signal for eliminating the amount of displacement from the amount of displacement obtained by the relative position calculating unit 29 and sending the signal to the xyΘtable driving unit 19. Next, the operation of the device configured as described above will be described. The liquid crystal display 10 is sucked to the jig base 12 and the suction position is fixed. The wiring board 11 is positioned and mounted on the xy table 13 by the pins 14 and 15. In this state, a movement control signal is sent from the movement control unit 30 and xyΘby the drive signal from the table drive unit 19, xy
The table 13 is moved, and the wiring board 11 is arranged with a small gap d in the y-axis direction with respect to the liquid crystal display 10 as shown in FIG. 2, for example, a gap of 0.1 to 0.5 mm. It is provisionally positioned. In this state, the imaging device 20
And the second positioning marks p1 and q1 are collectively put into the same field of view and imaged, and the image signal is output. At the same time, the other imaging device 21 captures the first and second positioning marks p2 and q2 together in the same field of view and captures the image, and outputs the image signal. Thus, the image signal output from the imaging device 20 is output to the A / D converter 2
2, the image signal is converted into a digital image signal, stored in the image memory 26 through the switching unit 24 as image data, and the image signal output from the imaging device 21 is converted by the A / D converter 2
The digital signal is converted into a digital image signal at 3 and stored in the image memory 26 through the switching unit 24 as image data. still,
The switching unit 24 switches the digital image signal of each of the imaging devices 20 and 21 to time-division and sends the digital image signal to the image memory 26.
Here, it is assumed that the image data obtained by imaging by the imaging device 20 is D1 shown in FIG. 3, and the image data obtained by imaging by the other imaging device 21 is D2. Now,
When such image data is stored in the image memory 26, the image data D
1, D2 are sent to the position calculation unit 28. The position calculating unit 28 first obtains the positions of the first positioning mark p1 and the second positioning mark q1 from the image data D1, and then obtains the first positioning mark p2 from the image data D2.
And each position of the second positioning mark q2. The positions of these marks p1, q1, p2, and q2 are sent to the relative position calculator 29 in accordance with commands from the main controller 27, respectively. Further, the relative position calculator 29 calculates the mark p
Receiving the positions of 1, q1, p2, and q2, the x-axis and y of the first position detection mark p1 and the second position detection mark q1
The displacements x1 and y1 in the axial direction are obtained, and the displacements x2 and y2 in the x-axis and y-axis directions between the first position detection mark p2 and the second position detection mark q2 are obtained. When the displacement amounts x1, y1 and x2, y2 are obtained in this way, the relative position calculation unit 2
Reference numeral 9 compares these misalignment amounts between the coaxial axes. That is,
The displacement amounts x1 and x2 are compared and the displacement amount y
1. Compare y2. As a result of this comparison, it is determined that the displacement amount is the same in both the x-axis direction and the y-axis direction. Judge that there is. Thus, the displacement amount x1 = x2 is sent to the movement control unit 30 according to a command from the main control unit 27, and the movement control unit 30
Creates a movement control signal for moving the x table 16 by x1 = x2 and sends it to the xy @ table driving unit 19.
As a result, the x table 16 moves, and the liquid crystal display 10 and the wiring board 11 are positioned. Next, each imaging device 2
It is assumed that the respective image data obtained by imaging 0 and 21 are D3 and D4 as shown in FIG. In this case, the provisional positioning between the liquid crystal display 10 and the wiring board 11 is in a state having an angle Θa as shown in FIG. Then
The position calculation unit 28 determines the positions of the first position detection mark p1 and the second position detection mark q1 and the positions of the first position detection mark p2 and the second position detection mark q2 from the image data D3 and D4, respectively. Ask for each. Then, the relative position calculator 29 calculates the marks p1, q1, p2,
From the position of q2, the amount of displacement x in the x-axis and y-axis directions between the first position detection mark p1 and the second position detection mark q1
3 and y3, respectively, and the displacement amounts x4 and y4 of the first position detection mark p2 and the second position detection mark q2 in the x-axis and y-axis directions, respectively. As described above, when the displacement amounts x3 and y3 and x4 and y4 are obtained, the relative position calculation unit 29 compares the displacement amounts coaxially. That is, the displacement amounts x3 and x
4 and the displacement amounts y3 and y4 are compared. As a result of this comparison, the amount of displacement is different in both the x-axis and y-axis directions. Thus, the relative position calculation unit 29 obtains the distance x5 in the x-axis direction and the displacement y5 in the y-axis direction between the second position detection marks q1 and q2 to obtain the angle Θa shown in FIG. An angle Θa, ｙa = tan-1 (y5 / x5) (Formula 1) is calculated from the interval x5 and the shift y5. Then, the angle Θa is sent to the movement control unit 30 according to a command from the main control unit 27, and the movement control unit 30 transmits a movement control signal for rotating the Θ table 18 by the angle Θa to the xyΘ table driving unit 19. Further, the xy @ table driving unit 19 sends the xy @ table 13
Sent to. As a result, the wiring board 11 is rotated in the 、 direction, and there is no positional displacement between the liquid crystal display 10 and the wiring board 11 in the y-axis direction. That is, this state is equivalent to a state in which there is a displacement in the x-axis direction as shown in FIG. Therefore, the relative position calculation unit 29 determines the amount of displacement in the x-axis direction, and the movement control unit 30 outputs a movement control signal for eliminating the displacement in the x-axis direction to the xyｘtable driving unit 19.
Send to As a result, the liquid crystal display 10 and the wiring board 11
Are positioned. Then, based on the positioned state, the liquid crystal display 10 and the wiring board 11 are connected, and a liquid crystal module is manufactured. As described above, in the positioning method according to the above-described embodiment, each of the imaging devices 2 is temporarily positioned with the liquid crystal display 10 and the wiring board 11.
The first and second positioning marks p1 and q1, and p2 and q2 respectively corresponding to 0 and 21 are put together in the same field of view and imaged collectively. The second positioning marks p1 and q1, p
Since the liquid crystal display 10 and the wiring board 11 are relatively moved by calculating the positional deviation amount between 2 and q2, the correction amount of the arrangement position of the two imaging devices 20 and 21 can be reduced to a negligible amount. At the same time, the equipment cost can be reduced, and the first and second position detection marks p1 and q1, and p2 and q2 are both placed in the same field of view.
The moving distance when connecting the wiring board 11 with the wiring board 11 is reduced. Therefore, the displacement between the liquid crystal display 10 and the wiring board 11 due to the movement at the time of connection can be minimized.

[0009]

According to the present invention, it is possible to provide a highly reliable positioning method in which each work can be accurately positioned by a simple positioning operation and no displacement occurs even when these works are connected. Further, according to the present invention, the liquid crystal display and the wiring board can be positioned based on a highly reliable positioning method, and as a result, both are connected. Can be provided. Further, a liquid crystal display provided with a positioning mark at both ends of a terminal row formed on the liquid crystal display and at a position separated from the end of the liquid crystal display by a predetermined distance toward the center of the liquid crystal display. By using this, it is possible to provide a highly reliable positioning method and a highly reliable liquid crystal module manufacturing method.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a positioning device using a positioning method according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a temporary positioning state of the liquid crystal display according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an imaging result of a positioning mark provided on a liquid crystal display and a wiring board according to the first embodiment of the present invention.

FIG. 4 is a diagram showing another example of the imaging result of the positioning mark provided on the liquid crystal display and the wiring board according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a state in which the liquid crystal display and the wiring board are arranged with a twist of an angle Δa.

FIG. 6 is a diagram showing the concept of a conventional positioning method.

[Explanation of symbols]

10 is a liquid crystal display, 11 is a wiring board, 12 is a jig base, 13 is an xy table drive, 19 is an xy table drive, 20 is an imaging device, 21 is an imaging device, 25 is an image processing device, 26 is an image memory, 27 is a main control unit, 28 is a position calculation unit, 29 is a relative position calculation unit, 30 is a movement control unit, 3
Reference numeral 1 denotes a relative position calculating means.

Claims (5)

[Claims] In a positioning method for positioning a first work and a second work, a first positioning mark provided on the first work and a first positioning mark provided on the second work are paired. An imaging step of imaging the second positioning mark used together in the same field of view,
A relative position calculating step of obtaining a relative position between the first positioning mark and the second positioning mark from image data obtained in the imaging step; and A moving step of relatively moving the first work and the second work. 2. A positioning method for positioning a first work and a second work, wherein when positioning the first work and the second work, a plurality of first and second works are provided at a plurality of positions on the first work. The predetermined first positioning mark of the one positioning mark and the predetermined first positioning mark of the plurality of second positioning marks provided on the second work and used in pairs with the first positioning mark. An imaging step of taking an image while putting a pair of predetermined second positioning marks together in the same field of view,
A relative position calculating step of calculating a relative position between the predetermined first positioning mark and the predetermined second positioning mark from image data obtained in the imaging step; and a relative position calculated in the relative position calculating step. Based on the first
A positioning method, comprising: a moving step of relatively moving the work and the second work. 3. A method for manufacturing a liquid crystal module, comprising: connecting a liquid crystal display and a wiring board to each other based on positioning the liquid crystal display and the wiring board, and manufacturing a liquid crystal module. An imaging step of imaging the first positioning mark provided on the wiring board and the second positioning mark used in pairs together in the same field of view, and obtaining the first positioning mark from image data obtained in the imaging step. A relative position calculating step of obtaining a relative position between a mark and the second positioning mark; and a movement of relatively moving the liquid crystal display and the wiring board based on the relative position obtained in the relative position calculating step. And a connection step of connecting the liquid crystal display and the wiring board positioned by the moving step. Production method. 4. A method for manufacturing a liquid crystal module, comprising: connecting a liquid crystal display and a wiring board to each other based on positioning the liquid crystal display and the wiring board; A predetermined first positioning mark among a plurality of first positioning marks provided at a plurality of locations on the display and a plurality of second positioning marks provided on the wiring board and used together with the first positioning mark. An imaging step of imaging the pair of predetermined second positioning marks together with the predetermined first positioning marks among the positioning marks in the same field of view, and obtaining the predetermined data from the image data obtained by the imaging step. Calculating a relative position between the first positioning mark and the predetermined second positioning mark, and calculating the relative position. A moving step of relatively moving the liquid crystal display and the wiring board based on the obtained relative position; and a connecting step of connecting the liquid crystal display and the wiring board positioned by the moving step. A method for manufacturing a liquid crystal module, comprising: 5. A liquid crystal display having a plurality of terminals connected to a plurality of terminals formed in parallel with each other on a wiring board, wherein the terminal row includes a plurality of terminals formed on the liquid crystal display. And a positioning mark formed at a predetermined distance from an end of the liquid crystal display on which the terminal row is formed.