JP2008010712A - Flexible substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the number of substrates taken from a large-sized mother substrate, in a flexible substrate for a display device in which a connector component is mounted. <P>SOLUTION: A flexible substrate 200 connected to the terminal 11 of a display device (for example, a liquid crystal display panel) 10 comprises an almost rectangular substrate body 210 whose one side is a connecting electrode side 220 connected to the terminal 11. In the flexible substrate, a connector component 24 is mounted on a predetermined portion in the substrate body 210, a slit 250 is formed along the mounting portion 230 for the connector component 24, and the mounting portion 230 for the connector component 24 can be folded like the tip of a tongue relative to the substrate body 210. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a flexible substrate connected to a terminal portion of a display device, and more particularly to a flexible substrate on which a connector component is mounted.

  A display device such as a liquid crystal display panel or an organic EL panel has a terminal portion to which a display drive signal is input. Usually, a flexible substrate as a signal supply unit is connected to the terminal portion. FIG. 4 shows an example in which the flexible substrate 20 is connected to the liquid crystal display panel 10.

  The liquid crystal display panel 10 is a display panel in which liquid crystal is sealed between two transparent electrode substrates on which display electrodes are formed of ITO or the like. A terminal portion 11 is connected to at least one transparent electrode substrate. Yes. Although not shown, the terminal portion 11 is formed with an extraction electrode connected to the display electrode. In the case of a COG (chip on glass) type model, an IC or LSI bare chip for display drive signal processing is mounted on the terminal portion 11.

  The flexible substrate 20 includes a substrate body 21 in which a copper foil wiring is formed on a base film made of a heat-resistant and flexible material such as a polyimide resin, and a coverlay is laminated on the copper foil wiring. A connection electrode (not shown) connected to the extraction electrode of the terminal portion 11 is formed on the connection electrode side 22 connected to the terminal 11. An anisotropic conductive film is usually used for connection between the terminal portion 11 and the connection electrode side 22.

  Since the flexible substrate 20 is a relay substrate that connects the liquid crystal display panel 10 and a display drive circuit substrate (not shown), a connector component 24 as a connection means for the display drive circuit substrate may be mounted on the substrate body 21.

  In many cases, the connector component 24 is a highly reliable connector for a printed circuit board (for example, a board-to-board connector) that is a multi-pin type and exhibits a strong fitting and coupling force. Even if this type of connector is connected or dissociated for the purpose of repair, for example, considerable force is required.

  Therefore, conventionally, from the viewpoint of workability of connector connection and disconnection, and in order to prevent unnecessary stress from being applied to other mounting parts during the work, the mounting portion 23 that protrudes outward on a predetermined side of the board body 21. Is formed in a tongue shape, and the connector part 24 is mounted on the mounting portion 23 (see, for example, Patent Document 1).

JP 2004-159173 A (FIGS. 4 and 8)

  Usually, the flexible substrate 20 is multi-faced from a large-sized mother board. However, if the board body 21 has the mounting portion 23 that protrudes outward as described above, the number of parts taken from the mother board is reduced. The production cost becomes higher. In addition, since there are many discarded substrates as industrial waste, it is not environmentally preferable.

  When the display device to which the flexible substrate 20 is connected is incorporated into a small casing having no space, such as a mobile phone, the connector component mounting portion 23 protruding from the substrate main body 21 is used as the substrate main body. However, in order to prevent the return due to the restoring force, a fixing means such as a double-sided adhesive tape is required separately, which is not preferable in terms of cost.

  Accordingly, an object of the present invention is to improve the workability of connecting and disconnecting connector parts in a flexible substrate for a display device on which the connector parts are mounted, and applying extra stress to other mounted parts during the work. It is an object of the present invention to provide a flexible substrate that can increase the number of large-size mother substrates while maintaining the above-mentioned points.

  In order to solve the above-described problems, the present invention provides a flexible substrate connected to a terminal portion of a display device as described in claim 1, wherein one side is a connection electrode side connected to the terminal portion. A board body having a substantially rectangular shape as a whole is provided, and a connector part is mounted at a predetermined position in the board body, and the mounting part is shaped like a tongue with respect to the board body along the mounting part of the connector part. A slit that can be bent is formed.

In a preferred embodiment of the present invention,
The aspect in which the slit is formed so that the mounting part of the connector component according to claim 2 is bent toward a side other than the connection electrode side;
A mode in which the mounting part of the connector component according to claim 3 can be bent so as to protrude to the outside of the board body,
The mounting part of the connector component according to claim 4 is arranged on the opposite side of the connection electrode side, and as the slit, a first slit cut substantially perpendicularly from the opposite side, and the first slit And an aspect including a second slit cut from the end portion substantially parallel to the opposite side.

  According to the present invention, the mounting part for the connector component is provided in the board body of the flexible board, and the board body is formed in a substantially rectangular shape. Can do more.

  The flexible substrate of the present invention is connected to a display device. Even when the display device is incorporated into a small casing having no space, such as a mobile phone, the connector component mounting portion is mounted on the substrate body. It can be installed as it is without being folded inward.

  In addition, a slit that allows the mounting part to be bent in a tongue-like shape with respect to the board body is formed along the mounting part of the connector part, so that it is possible to connect the connector part without applying extra stress to other mounting parts. Can be easily connected and disconnected.

  Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 3, but the present invention is not limited to this. FIG. 1 is a plan view showing a flexible substrate of the present invention connected to a liquid crystal display panel, FIG. 2 is a schematic view showing a bent state of a mounting part of a connector component, and FIG. 3 is a flexible diagram according to another embodiment of the present invention. It is a top view shown in the state where the board | substrate was connected to the liquid crystal display panel. In the description of this embodiment, the display device is a liquid crystal display panel, but may be an organic EL panel, a plasma display, or the like.

  As shown in FIG. 1, the flexible substrate 200 of the present invention is used by connecting to a terminal portion 11 of a liquid crystal display panel 10 as a display device, for example. The liquid crystal display panel 10 may have the configuration described above with reference to FIG. 4. However, the liquid crystal display panel 10 in this example is a COG type, and an IC or LSI bare chip 12 for display drive signal processing is mounted on the terminal portion 11. Has been.

  The flexible substrate 200 includes a substrate body 210 having one side serving as a connection electrode side 220 with respect to the terminal portion 11, and a connector component 24 as a connection means for a display drive circuit substrate (not shown) is mounted on the substrate body 210. In FIG. 2, since the mounting part 230 for mounting the connector component 24 is provided in the board main body 210, the whole board main body 210 is formed in a substantially rectangular shape. Thereby, when the flexible substrate 200 is multi-sided from a large-sized mother substrate, the number of the substrates can be increased.

  Although not shown, an extraction electrode connected to the display electrode in the liquid crystal display panel 10 is formed on the terminal portion 11, and a connection electrode corresponding to the extraction electrode is formed on the connection electrode side 220. The part 11 and the connection electrode side 220 are electrically and mechanically connected via, for example, an anisotropic conductive film as a conductive bonding means.

  The substrate body 210 has a structure in which copper foil wiring is formed on a base film made of a heat-resistant and flexible material such as polyimide resin, and a coverlay is laminated on the copper foil wiring, as in the conventional example described above. It may be. The connector component 24 is a highly reliable connector for a printed circuit board (for example, a board-to-board connector) that exhibits a strong fitting and coupling force with a multi-pin type. The counterpart of the connector component 24 is provided on the display drive circuit board side (not shown).

  In this embodiment, the mounting part 230 of the connector component 24 is disposed on the opposite side 221 side facing the connection electrode side 220. A slit 250 is formed along the mounting portion 230 of the connector component 24 so that the mounting portion 230 of the connector component 24 can be bent as a tongue piece with respect to the board body 210.

  In this embodiment, since the mounting part 230 of the connector component 24 is disposed on the opposite side 221 side of the connection electrode side 220, the slit 250 is formed in an approximately L shape along the mounting part 230 of the connector part 24. .

  That is, the first slit 251 is inserted substantially perpendicularly from the opposing side 221, and the second slit 252 is inserted from the end of the first slit 251 toward the left side 222 of the substrate body 210 substantially parallel to the opposing side 221. In this embodiment, the third slit 253 is inserted with a short distance from the end of the second slit 252 toward the connection electrode side 220 and substantially parallel to the left side 222.

  According to this, as shown in FIG. 2, the mounting portion 230 of the connector component 24 can be bent with respect to the board body 210. Therefore, it is possible to easily connect and disconnect the connector component 24 without applying extra stress to other mounted components (components mounted in the shaded area in FIG. 1). The connector component 24 may be mounted on either the front side or the back side of the mounting unit 230.

  In order to improve the workability of the connection and disconnection, the second slit 252 is made longer and the mounting portion 230 of the connector component 24 protrudes to the outside of the board body 210 (in this example, the left side 222 side). Preferably it is possible.

  Further, after the connector part 24 is connected, if the mounting portion 230 is returned into the board main body 210, there is no protruding portion on the board main body 210. Therefore, the liquid crystal display panel 10 is placed in a small casing having no space, such as a cellular phone. Even in the case of incorporation into the device, it can be incorporated as it is.

  From the viewpoint of workability of connection / disconnection of the connector component 24 and the component layout of the board body 210, the mounting portion 230 of the connector component 24 is arranged on the opposite side 221 side of the connection electrode side 220 as in the above embodiment. However, as shown in FIG. 3, as another embodiment, the mounting part 230 of the connector component 24 may be disposed away from the facing side 221 and closer to the center of the board body 210.

  In this case, the slit 260 is formed in a substantially U shape along the mounting portion 230 of the connector component 24. That is, when the mounting part 230 of the connector component 24 can be bent to the left side 222 side of the board main body, the two horizontal slits 261 and 262 are formed on the upper side and the lower side of the mounting part 230 in parallel with the opposing side 221. In addition to the length, a vertical slit 263 is inserted between the right ends of the horizontal slits 261 and 262.

  1, the mounting part 230 of the connector component 24 is formed in a tongue-like shape with respect to the board main body 210, and the mounting part 230 of the connector part 24 is preferably directed outward of the board main body 210. Can be folded.

  Although not shown, as another embodiment, the mounting part 230 of the connector component 24 can be bent toward the opposite side 221 side of the connection electrode side 220 or the right side 223 side of the board body 210.

The top view shown in the state connected to the liquid crystal display panel of the flexible substrate of this invention. FIG. 1 is a schematic diagram showing a bent state of a mounting part of a connector component on a flexible board. The typical top view which shows another embodiment of this invention. The typical top view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Liquid crystal display panel 11 Terminal part 24 Connector part 200 Flexible board 210 Board | substrate body 220 Connection electrode side 221 Opposite side 230 Connector part mounting part 250,260 Slit

Claims (4)

In the flexible substrate connected to the terminal portion of the display device,
One side is a connection electrode side that is connected to the terminal part, and the board body has a substantially rectangular shape as a whole, and a connector part is mounted at a predetermined position in the board body. A flexible substrate characterized in that a slit is formed so that the mounting portion can be bent in a tongue-like shape with respect to the substrate body.   The flexible substrate according to claim 1, wherein the slit is formed so that a mounting portion of the connector component is bent toward a side other than the connection electrode side.   The flexible substrate according to claim 1, wherein the connector component mounting portion can be bent so as to protrude to the outside of the substrate body. A mounting part of the connector component is disposed on the opposite side of the connection electrode side, and as the slit, a first slit cut substantially perpendicularly from the opposite side, and an end of the first slit from the opposite side 4. The flexible substrate according to claim 1, further comprising: a second slit cut substantially in parallel with the second slit. 5.

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