JPH086055A - Liquid crystal display panel, and liquid crystal display module and their manufacture - Google Patents

Abstract

PURPOSE:To position the connection terminals of the liquid crystal panel and the connection terminals of a flexible wiring board without using any complex expensive image processor when the terminals are positioned and connected electrically. CONSTITUTION:A positioning hole 21 is provided at a specific place on the lower transparent substrate 6 of the liquid crystal display panel 5 and a positioning mark 22 formed of Cu is provided at a specific place on the flexible wiring board 10. Then the superposition state of the positioning hole 21 and positioning mark 22 is recognized as an image through a monitor camera 3. In this case, reflected light transmitted through the lower transparent substrate 6 consisting of, for example, a film substrate and reflected light transmitted through the positioning hole 21 are greatly different in reflection quantity, so the image of the positioning hole 21 is recognized by utilizing the difference in reflection quantity to enable the positioning without using any complex expensive image processor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel, a liquid crystal display module and a method for manufacturing the same.

[0002]

2. Description of the Related Art A liquid crystal display module is generally a liquid crystal display panel in which liquid crystal is sealed between two transparent substrates made of glass or resin, an IC chip for driving this liquid crystal display panel, and this IC chip. It is provided with a circuit board and the like for controlling. Such liquid crystal display modules are roughly classified into three types depending on the difference in the arrangement position of the IC chips. First, there is one in which an IC chip is mounted on a circuit board and the liquid crystal display panel and the circuit board are connected via a flexible wiring board. Second, the IC chip is mounted on a flexible wiring board (TAB tape),
There is one in which a liquid crystal display panel and a circuit board are connected via a flexible wiring board (TAB tape). Third
In some cases, an IC chip is mounted on a liquid crystal display panel and the liquid crystal display panel and a circuit board are connected via a flexible wiring board.

By the way, in the case of connecting the liquid crystal display panel and the flexible wiring board in the above, there is a method in which the both are aligned and then connected by bonding. FIG. 2A shows an outline of a bonding apparatus used in such a connecting method. This bonding apparatus includes a first moving stage 1, a second moving stage 2, two monitor cameras 3, a bonding head 4 and the like. Of these, the first and second moving stages 1 and 2 are movable in the horizontal direction, and X,
Fine adjustment is possible in the Y direction. The two monitor cameras 3 are fixedly arranged below the first moving stage 1. The bonding head 4 is arranged above the first moving stage 1 so as to be vertically movable.

A liquid crystal display panel 5 is arranged and positioned on the first moving stage 1 in the X, Y and θ directions. As shown in FIG. 2B, in the liquid crystal display panel 5, one end portion of the lower transparent substrate 6 is projected from the upper transparent substrate 7, and the connection terminal 8 is provided on the upper surface of the projecting portion. . Further, cross-shaped alignment marks 9 are provided on both ends of the upper surface of the protruding portion of the lower transparent substrate 6. In this case, the connection terminal 8 and the alignment mark 9 are made of the same material (ITO) as the transparent display electrode (not shown) of the liquid crystal display panel 5.
A flexible wiring board 10 is provided on the second moving stage 2.
Are positioned and arranged in the X, Y, and θ directions. In this case, a predetermined one end of the flexible wiring board 10 is projected from the second moving stage 2 toward the first moving stage 2 by a predetermined amount. On the lower surface of one end of the flexible wiring board 10, as shown in FIG.
As shown in FIG. 3, a connection terminal 11 is provided, and cross-shaped alignment marks 12 are provided at both ends of the terminal portion including the connection terminal 11. In this case, the connection terminal 11
The alignment mark 12 and the alignment mark 12 are made of the same material (C) as the wiring pattern (not shown) of the flexible wiring board 10.
u).

When performing bonding with this bonding apparatus, first, the first and second moving stages 1 and 2 are positioned at the bonding position. In this state, the second moving stage 2 of the flexible wiring substrate 10 is
One end protruding from the liquid crystal display panel 5 is located above the protruding portion of the lower transparent substrate 6, and the alignment marks 12 provided at two predetermined positions on one end of the flexible wiring substrate 10 are liquid crystal. Lower transparent substrate 6 of display panel 5
Will be superposed on the positioning marks 9 provided at the predetermined two positions of the protruding portion by the mechanical positional accuracy. Therefore, the positional deviation amounts of the marks 9 and 12 in the superposed state of the two marks 9 and 12 are image-recognized by the two monitor cameras 3 and corrected when the positional deviations occur. Then, when the alignment by the marks 9 and 12 is completed, the bonding head 4 is lowered to perform the bonding, and the flexible wiring board 10
The connection terminal 11 of is electrically connected to the connection terminal 8 of the liquid crystal display panel 5.

[0006]

However, in such a conventional bonding method, when the monitor camera 3 recognizes an image of the overlapping state of both marks 9 and 12,
Both marks 9 and 12 will be confirmed through the transparent part (not shown) made of glass or the like of the first moving stage 1 and the lower transparent substrate 6 of the liquid crystal display panel 5, but the alignment made of ITO Mark 9 is transparent and the film thickness is 5
Since it is as thin as 00 to 1000Å, there is a problem that a complex and expensive image processing device is required for image recognition. That is, for example, the lower transparent substrate 6 made of a film substrate and the alignment mark 9 made of ITO.
Since the amount of reflection differs between the reflected light that passes through and the reflected light that passes through only the lower transparent substrate 6, the alignment mark 9 is image-recognized by the difference in the amount of reflection. Since it is a transparent thin film, the difference in the amount of reflection at this time becomes small, and in order to recognize this image, the image processing device used for it becomes complicated, and accordingly it becomes expensive. Further, when both transparent substrates 6 and 7 of the liquid crystal display panel 5 are made of film substrates, since they are flexible, the strength of the projecting portion of the lower transparent substrate 6 becomes particularly weak. A deflection plate or a reflection plate (not shown) generally provided on the lower surface corresponding to the display area.
May extend to the lower surface of the protruding portion of the lower transparent substrate 6 to increase the strength of the protruding portion of the lower transparent substrate 6. In such a case, since the light passing through the deflector is reduced, the transmissivity is reduced, which makes it difficult for the monitor camera 3 or the like to recognize an image. On the other hand, the reflector does not transmit light. However, there is a problem that the images of both marks 9 and 12 cannot be recognized, and the alignment cannot be performed.
An object of the present invention is to provide a liquid crystal display panel, a liquid crystal display module, and a method for manufacturing the same that can perform alignment without using a complicated and expensive image processing device.

[0007]

According to another aspect of the present invention, there is provided a liquid crystal display panel, wherein one end of at least one transparent substrate is projected from the other transparent substrate and the projecting portion faces the other transparent substrate. The connection terminal is provided on the surface on the side where the connection is made, and the positioning holes are provided at both ends of the protruding portion. The liquid crystal display panel according to the invention according to claim 2, wherein a deflector or a reflector is provided on a surface of the one transparent substrate not facing the other transparent substrate so as to extend to the protruding portion, and the alignment is performed. A through hole is provided in the deflecting plate or the reflecting plate in a portion corresponding to the use hole.
The liquid crystal display module according to a third aspect of the present invention is a flexible wiring board connection terminal having alignment marks at both ends of a terminal portion provided with the connection terminal.
Alternatively, the connection terminal of the liquid crystal display panel described in 2 is conductively connected in a state in which the alignment mark of the flexible wiring board and the alignment hole of the liquid crystal display panel are aligned. A method of manufacturing a liquid crystal display module according to a fourth aspect of the present invention includes a terminal portion including a connection terminal of a flexible wiring board having alignment marks at both ends of the terminal portion provided with the connection terminal, and the first or second aspect. The terminal portion including the connection terminal of the liquid crystal display panel described above is overlapped, and the positional deviation amount between the alignment mark of the flexible wiring board and the alignment hole of the liquid crystal display panel is measured by the camera from the liquid crystal display panel side. After recognizing the image and aligning the alignment mark of the flexible wiring board with the alignment hole of the liquid crystal display panel based on the recognition result, the connection terminal of the flexible wiring board and the liquid crystal display panel are connected. The terminals are electrically connected.

[0008]

According to the present invention, the alignment mark of the flexible wiring board is superposed on the alignment hole of one transparent substrate of the liquid crystal display panel, and the positional deviation amount in the superposed state is measured from the liquid crystal display panel side. When recognizing an image with a camera, the amount of reflection between the reflected light that has passed through one transparent substrate and the reflected light that has passed through the alignment hole can be made very different. When the image recognition is performed, the image recognition in the alignment can be performed without using a complicated and expensive image processing device. Further, in the case of the invention described in claim 2, since the through hole is provided in the deflecting plate or the reflecting plate in the portion corresponding to the alignment hole of the one transparent substrate of the liquid crystal display panel, the image recognition in the alignment is performed. Can be performed without any trouble.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is shown to explain one embodiment of the present invention, (A) is a schematic view of a bonding apparatus,
(B) is a partial plan view of the liquid crystal display panel, and (C) is a partial plan view of the flexible wiring board. In these drawings, the same parts as those in FIGS. 2A to 2C are designated by the same reference numerals, and the description thereof will be appropriately omitted. In this embodiment, the lower transparent substrate 6 and the upper transparent substrate 7 which compose the liquid crystal display panel 5 are made of a resin such as polyethylene terephthalate (PET), polyether sulfone (PES) and polyimide, and have a thickness of 0.1 to 1.5 mm. This is a substrate having a plate thickness of the order of magnitude, and square positioning holes 21 are punched out at both ends of the protruding portion of the lower transparent substrate 6 of the liquid crystal display panel 5, and the connection terminals 11 of the flexible wiring substrate 10 are formed. Square-shaped alignment marks 22 made of Cu are provided at both ends of the terminal portion including. in this case,
If the protruding length of the protruding portion of the lower transparent substrate 6 of the liquid crystal display panel 5 is about 2 to 3 mm, the positioning hole 21
And the size of the alignment mark 22 is 0.5 to 1.
It is about 0 mm square.

When the liquid crystal display panel 5 and the flexible wiring board 10 are connected in this embodiment, one end of the flexible wiring board 10 protruding from the second moving stage 2 is placed under the liquid crystal display panel 5. When it is positioned above the protruding portion of the side transparent substrate 6, the flexible wiring substrate 10
Positioning marks 22 provided at predetermined two positions on one end of the liquid crystal display are aligned with mechanical positioning accuracy at positioning holes 21 provided at two predetermined positions of the protruding portion of the lower transparent substrate 6 of the liquid crystal display panel 5. Are overlaid by. Therefore, the image of the superposed state is recognized by the two monitor cameras 3. In this case, since the lower transparent substrate 6 has a relatively large thickness of 0.1 to 1.5 mm, the reflection amount of the reflected light transmitted through the lower transparent substrate 6 and the reflected light transmitted through the positioning hole 21 is small. If the image of the alignment hole 21 is recognized based on the difference in the reflection amount, the image recognition is performed by a simple and inexpensive image processing device without using a complicated and expensive image processing device. It will be possible. Then, based on the result of this image recognition, the positioning hole 21
After the alignment (the matching of the four sides of the two with each other on the screen) is completed, the bonding head 4 is lowered to perform the bonding, and the connection terminal 11 of the flexible wiring board 10 is connected to the liquid crystal display panel. 5 is conductively connected to the connection terminal 8.

The shapes of the positioning hole 21 and the positioning mark 22 are not limited to the shapes of the above embodiment, that is, the square shape. For example, the alignment mark 22 may be formed in a cross shape, and the center of the cross mark may be positioned at the center of the square alignment hole 21 to perform the alignment.

Further, in the structure of the liquid crystal display panel 5, a deflector or a reflector (not shown) generally provided in a portion corresponding to the display area on the lower surface of the lower transparent substrate 6 is provided on the lower transparent substrate 6. In the case of the structure that extends to the lower surface of the protruding portion, if a through hole is provided in the deflecting plate or the reflecting plate in the portion corresponding to the positioning hole 21, the image recognition in the positioning can be performed without any trouble. it can. In this case, the positioning hole 21 is formed in the lower transparent substrate 6 by punching, and at the same time, the through hole is formed in the deflecting plate or the reflecting plate.

[0013]

As described above, according to the present invention, the reflection amount of the reflected light transmitted through one transparent substrate of the liquid crystal display panel and the reflected light transmitted through the alignment hole can be greatly different. Therefore, if the alignment hole is image-recognized based on the difference in the reflection amount, the image recognition in the alignment can be performed without using a complicated and expensive image processing device. Further, according to the second aspect of the present invention, since the through hole is provided in the deflecting plate or the reflecting plate in the portion corresponding to the positioning hole of the one transparent substrate of the liquid crystal display panel, the image recognition in the positioning can be performed. It can be done without any problems.

[Brief description of drawings]

FIG. 1 is a view for explaining one embodiment of the present invention, (A) is a schematic view of a bonding apparatus, (B) is a plan view of a part of a liquid crystal display panel, and (C) is a flexible wiring board. Plan view of a part of.

2A and 2B are shown for explaining a conventional example, FIG. 2A is a schematic view of a bonding device, FIG. 2B is a plan view of a part of a liquid crystal display panel, and FIG. 2C is a part of a flexible wiring board. Plan view.

[Explanation of symbols]

 1 1st moving stage 2 2nd moving stage 3 Monitor camera 4 Bonding head 5 Liquid crystal display panel 6 Lower transparent substrate 7 Upper transparent substrate 8 Connection terminal 10 Flexible wiring board 11 Connection terminal 21 Positioning hole 22 For positioning mark

Claims (4)

[Claims] 1. One end portion of at least one transparent substrate is projected from the other transparent substrate, and a connection terminal is provided on a surface of the protruding portion facing the other transparent substrate, and both end portions of the protruding portion are provided. A liquid crystal display panel, which is provided with a positioning hole. 2. A deflecting plate or a reflecting plate is provided on a surface of the one transparent substrate not facing the other transparent substrate so as to extend to the projecting portion, and the deflecting plate or the reflecting plate is provided in a portion corresponding to the alignment hole. The liquid crystal display panel according to claim 1, wherein a through hole is provided in the deflector or the reflector. 3. The flexible wiring board according to claim 1 or 2, wherein the connection terminal of the flexible wiring board has alignment marks at both ends of the terminal portion provided with the connection terminal and the connection terminal of the liquid crystal display panel according to claim 1. A liquid crystal display module, which is conductively connected in a state where the alignment mark and the alignment hole of the liquid crystal display panel are aligned. 4. A terminal portion including a connection terminal of a flexible wiring board having alignment marks at both ends of a terminal portion provided with a connection terminal, and a terminal including a connection terminal of a liquid crystal display panel according to claim 1 or 2. Overlap with the part,
An image of the positional deviation between the alignment mark of the flexible wiring board and the alignment hole of the liquid crystal display panel is recognized by a camera from the liquid crystal display panel side, and the flexible wiring board is aligned based on the recognition result. A method for manufacturing a liquid crystal display module, characterized in that the connection terminal of the flexible wiring board and the connection terminal of the liquid crystal display panel are conductively connected after the positioning mark and the positioning hole of the liquid crystal display panel are aligned. .