TW201632039A - Flexible printed circuit board and flexible display device comprising the same - Google Patents

Abstract

A flexible printed circuit for connecting a first circuit module and a second circuit module which comprises a bridge part, a first extension part, a first connection part and a second connection part. The bridge part comprises a first end and a second part that are opposite to each other. The first extension part comprises a first main extent section and a first outer extent section. The first outer extent section comprises a first side. The first main extent section and the first end connect to the first side. The fist connection part connects to the first circuit module and an end of the first main extent section which is away from the first outer extent section. The second connection part connects to the second end and the second circuit module.

Description

Flexible circuit board and curved display device using the same

The present invention relates to a flexible circuit board; and more particularly to a flexible circuit board applied to a curved display device.

In recent years, in order to meet the consumer demand for TV viewing experience, various manufacturers have launched large-scale curved screen TVs, not only the curved surface of the screen makes the image more balanced, but also creates a wide panoramic view. In order to support large-size curved screens, it is necessary not only to bend the display device, but also to use at least one source board (Source Board), for example, when the size exceeds 32 inches, depending on the size and resolution. Panels typically require two source printed circuit boards. Traditionally, the jump between the various source printed circuit boards is usually a Flexible Printed Circuit (FPC) or a Flat Flexible Cable (FFC).

However, it is precisely because of the bending relationship of the display device that the distance between the source printed circuit boards on the TV panel is elongated, which will cause the flexible circuit board of the bridge circuit board to become tight, and thus the source printed circuit Chip on-board (COF) on the board creates internal stresses that pull, which in turn creates a flexible circuit board. And the rupture of the die-film package causes damage to the integrated circuit thereon.

In this regard, the traditional solution proposed is to provide a long flexible circuit board for the required elongation distance after the panel is bent, but the excessively long flexible circuit board causes unnecessary distortion, such as in shipping. Or when the stock needs to be stacked, it is easy to crimp to the protrusion generated by the unnecessary distortion, causing a problem that the flexible circuit board is damaged.

In view of this, the present invention proposes a flexible circuit board, whereby the problem that the flexible circuit board or the die-film package is broken due to the tension of the pull can be avoided when applied to the curved display device.

A flexible circuit board for connecting a first circuit module and a second circuit module, the flexible circuit board comprising a bridge portion, a first extension portion, and a first connection portion And a second connecting portion. The bridge has a first end and a second end. The first extension portion includes a first main extension and a first outer extension. The first outer extension has a first side, and the first main extension and the first end are connected to the first side. The first connecting portion connects the first main extension to an end of the first outer extension and the first circuit module. The second connecting portion is connected to the second end and the second circuit module.

A curved display device according to an embodiment of the present invention includes a display module, a first circuit module, a second circuit module, a plurality of connection substrates, and the flexible circuit board described in the foregoing embodiments. The display module comprises a module front surface, a module back surface and a curved side edge. The front side of the module and the back side of the module are opposite each other, and the curved side is The edge is connected between the front of the module and the back of the module. The first circuit module and the second circuit module are respectively disposed on the back of the module. One ends of the connecting substrates are respectively connected to the front surface of the module, and the other ends of the connecting substrates are respectively connected to the first circuit module and the second circuit module, wherein the connecting substrates bypass the curved side edges. The first connecting portion of the flexible circuit board in the foregoing embodiment is connected to the first circuit module, and the second connecting portion is connected to the second circuit module.

According to the flexible circuit board provided by the present invention, the first main extension is connected to the first side of the first circuit module and the first outer extension, and the first side of the first outer extension is connected to the bridge. The first end and the second connecting portion are respectively connected to the second end of the bridge portion and the structure of the second circuit module. It is possible to solve the problem that the flexible circuit board and the crystal soft film package are broken due to the tension when applied to the curved display device.

In addition, the structural design of the flexible circuit board plane does not cause the problem of poor signal transmission in the case of bridging the circuit module. What's more, when it is necessary to stack for shipment or inventory, the flexible circuit board will not be worn or broken due to being squeezed.

1‧‧‧ Curved display device

20‧‧‧Display module

20a‧‧‧Modular front

20b‧‧‧ back of the module

20c‧‧‧ curved side edge

41‧‧‧First Circuit Module

42‧‧‧Second circuit module

50‧‧‧Connecting substrate

100a, 100b, 100c, 100d, 100e, 100f‧‧‧ flexible circuit boards

110‧‧‧First connection

120‧‧‧First Extension

121‧‧‧First outer extension

121a‧‧‧ first side

122‧‧‧First main extension

123‧‧‧First inner extension

130‧‧‧First slot

140‧‧‧First inner slit

210‧‧‧Second connection

221‧‧‧Second outer extension

221a‧‧‧ second side

220‧‧‧Second extension

222‧‧‧Second main extension

223‧‧‧Second inner extension

230‧‧‧second slot

240‧‧‧Second inner slit

300‧‧‧Bridge

301‧‧‧ first end

302‧‧‧ second end

F‧‧‧ fillet

Fig. 1 is a schematic view of a flexible circuit board according to a first embodiment of the present invention.

Figure 2 is a schematic view of a flexible circuit board in accordance with a second embodiment of the present invention.

Figure 3 is a schematic view of a flexible circuit board in accordance with a third embodiment of the present invention.

Figure 4 is a schematic view of a flexible circuit board in accordance with a fourth embodiment of the present invention.

Fig. 5 is a schematic view showing a flexible circuit board according to a fifth embodiment of the present invention.

Figure 6 is a schematic view of a flexible circuit board in accordance with a sixth embodiment of the present invention.

Fig. 7 is a schematic view showing the combination of a flexible circuit board and a curved display device according to the present invention.

Fig. 8 is a view showing a state in which the flexible circuit board and the curved display device according to Fig. 7 are in a bent state.

In the following, the present invention will be described by way of examples only, and the present invention will be further described in detail, but the scope of the present invention is not limited by any point of view.

It is to be noted that the present invention is a simplified schematic and is merely illustrative of the basic structure of the invention. Therefore, only the components related to the present invention are labeled in the drawings, and the components are not drawn in the actual number, shape, size ratio, etc., and the actual size is actually an option. The design, and its component layout form may be more complicated, first described.

Please refer to Figure 1. Fig. 1 is a schematic view of a flexible circuit board according to a first embodiment of the present invention.

The flexible circuit board 100a of the present embodiment is applied to connect the first circuit module 41 and the second circuit module 42.

In detail, the flexible circuit board 100a can be used to bridge the first circuit module 41 and the second circuit module 42 at a certain distance. The first circuit module 41 and the second circuit module 42 are, for example, source printed circuit boards, but are not limited thereto. As for the effectiveness of the flexible circuit board jumper circuit module proposed by the present invention, please refer to it later.

Further, the flexible circuit board 100a includes a bridge portion 300, a first extension portion 120, a first connection portion 110, and a second connection portion 210. The bridge portion 300 has opposite first ends 301 and second ends 302. The first extension portion 120 includes a first main extension 122 and a first outer extension 121. The first outer extension 121 has a first side 121a, and the first main extension 122 and the first end 301 of the bridge 300 are connected to the first The first side 121a of the outer extension 121. The first connecting portion 110 is connected to one end of the first main extending portion 122 away from the first outer extending portion 121 and the first circuit module 41, that is, the first main extending portion 122 is disposed on the first outer extending portion 121 and the first circuit Between modules 41. The second connecting portion 210 connects the second end 302 of the bridge portion 300 and the second circuit module 42 . The bridge portion 300 is separated from the first main extension portion 122 to form a first slot 130, that is, the bridge portion 300 and the first main extension portion 122 are separated from each other and maintained at a distance. It can be understood that, in this embodiment or other embodiments, the size of the bridge portion 300 or the first main extension portion 122 can be adjusted according to the distance between the first circuit module 41 and the second circuit module 42. Not for use.

Next, please refer to Figure 2. Figure 2 is a schematic view of a flexible circuit board in accordance with a second embodiment of the present invention.

The difference between the flexible circuit board 100b in this embodiment and the flexible circuit board 100a in the first embodiment is that the first outer extension 121 of the present embodiment has an inner fillet F adjacent to the first slot 130. However, please refer to the use of the fillet F for details.

Next, please refer to Figure 3. Figure 3 is a schematic view of a flexible circuit board in accordance with a third embodiment of the present invention.

The difference between the flexible circuit board 100c in this embodiment and the flexible circuit board 100a in the first embodiment is the structure in which the second end 302 of the bridge portion 300 is connected. In this embodiment, the flexible circuit board 100c further includes a second extension portion 220, and the second extension portion 220 includes a second outer extension portion 221, and the second end 302 of the bridge portion 300 is connected through the second outer extension portion 221 Two connecting portions 210.

The other components, such as the first extension portion 120 and the bridge portion 300, are the same as those in the first embodiment, and will not be described again.

Please refer to Figure 4. Figure 4 is a schematic view of a flexible circuit board in accordance with a fourth embodiment of the present invention.

The difference between the flexible circuit board 100d in this embodiment and the flexible circuit board 100c in the third embodiment lies in the structure of the second extension portion 220. In this embodiment, the second extension 220 of the flexible circuit board 100d further includes a second main extension 222, the second outer extension 221 has a second side 221a, and the second main extension 222 is connected to the second end 302. The second side 221a of the second outer extension 221 . In addition, the bridge portion 300 is separated from the second main extension 222 to form a second slot 230, that is, the bridge portion 300 and the second main extension portion 222 are separated from each other and maintained at a distance.

The other components, such as the first extension portion 120 and the bridge portion 300, are the same as those in the third embodiment, and will not be described again.

Please refer to Figure 5. Fig. 5 is a schematic view showing a flexible circuit board according to a fifth embodiment of the present invention.

The difference between the flexible circuit board 100e in this embodiment and the flexible circuit board 100d in the fourth embodiment lies in the structure of the first extension portion 120. In the embodiment, the first extension portion 120 of the flexible circuit board 100e further includes a first inner extension portion 123, and the first main extension portion 122 is connected to the first connection portion 110 through the first inner extension portion 123, and A main extension 122 and the first connection portion 110 are located on the same side of the first inner extension 123. In addition, the first connecting portion 110 is separated from the first main extending portion 122 to form the first inner slit 140, that is, the first connecting portion 110 and the first main extending portion 122 are separated from each other and maintained at a pitch.

Other components such as the second extension portion 220 and the bridge portion 300 are the same as the fourth embodiment. Again, please do not repeat them.

Please refer to Figure 6. Figure 6 is a schematic view of a flexible circuit board in accordance with a sixth embodiment of the present invention.

The difference between the flexible circuit board 100f in the present embodiment and the flexible circuit board 100e in the fifth embodiment lies in the structure of the second extension portion 220. In this embodiment, the second extension portion 220 of the flexible circuit board 100f further includes a second inner extension portion 223, and the second main extension portion 222 is connected to the second connection portion 210 through the second inner extension portion 223, and The two main extensions 222 and the second connection portion 210 are located on the same side of the second inner extension 223. In addition, the second connecting portion 210 is separated from the second main extending portion 222 to form the second inner slit 240, that is, the second connecting portion 210 and the second main extending portion 222 are separated from each other and maintained at a distance.

The other components, such as the first extension portion 120 and the bridge portion 300, are the same as those in the fifth embodiment, and will not be described again.

Next, please refer to Figure 7. Fig. 7 is a schematic view showing the combination of a flexible circuit board and a curved display device according to the present invention.

The present embodiment provides a curved display device 1 , which is a display device that can be applied to a curved screen television, but is not limited thereto. The display module 20, the first circuit module 41, the second circuit module 42, the plurality of connection substrates 50, and the flexible circuit board 100a as in the foregoing embodiment.

It should be noted that the flexible circuit board in the curved display device 1 of the present embodiment is exemplified by the flexible circuit board 100a in the first embodiment, but is merely for the convenience of explaining the spirit of the embodiment, and is not This is limited. The flexible circuit board of other embodiments may be selected by the user according to the requirements, and is specifically stated herein.

Further, in this embodiment, the display module 20 includes a module front surface 20a, a module back surface 20b, and a curved side edge 20c. The module front surface 20a and the module back surface 20b are opposite to each other, and the curved side edge 20c is connected. Between the front side 20a of the module and the back side 20b of the module. It can be seen that the first circuit module 41 and the second circuit module 42 are respectively disposed on the module back surface 20b.

The flexible circuit board 100a is disposed on the module front surface 20a.

One end of the connecting substrate 50 is connected to the front surface 20a of the module, and the other end of the connecting substrate 50 is connected to the first circuit module 41 and the second circuit module 42 respectively. These connecting substrates 50 bypass the curved side edges 20c. In this embodiment, each of the connection substrates 50 is a chip on film (COF), but is not limited thereto.

The first connecting portion 110 of the flexible circuit board 100a is used to connect the first circuit module 41, and the second connecting portion 210 is used to connect the second circuit module 42.

As can be seen from the figure, the flexible circuit board 100a is a flat structure, and the whole can be disposed flat on the first circuit module 41 and the second circuit module 42. It can be understood that, in actual conditions, even when a plurality of curved display devices 1 are stacked for shipment or inventory, the flexible circuit board 100a is not worn or broken due to being squeezed, and can be combined with a panel of a general planar structure. The shipping model is no different, and therefore does not increase the packaging cost, as well as the problem of damage when the package is shipped.

Next, please refer to FIG. 8. FIG. 8 is a schematic view showing the flexible circuit board and the curved display device according to FIG.

As can be seen from the figure, since the curved display device 1 is bent in the direction of the module front surface 20a, the distance between the first circuit module 41 and the second circuit module 42 disposed on the module back surface 20a is increased. Therefore, the first connection portion 110 and the second connection portion 210 of the first circuit module 41 and the second circuit module 42 are respectively connected to each other in the flexible circuit board 100a. At this time, the first main extension 122 will be far away The display module 20 is bent in one direction. It can also be said that the distance between the end of the first main extension 122 adjacent to the first outer extension 121 and the display module 20 increases, and the first outer extension 121 connected to the first main extension 122 and the bridge The portion 300 is also bent away from the display module 20, so that the bridge portion 300 is not stretched or even broken by the first circuit module 41 and the second circuit module 42. Therefore, the flexible circuit board 100a does not cause the internal stress of the first circuit module 41 and the second circuit module 42 to be pulled, causing the connection substrate 50 to be pulled and broken.

It will be appreciated that the flexible circuit board can be structurally adjusted as desired. For example, in other embodiments, the length of the first main extension 122 or the second main extension 222 can be adjusted. When the length of the first main extension 122 or the second main extension 222 is longer, the extension between the first circuit module 41 and the second circuit module 42 can be improved after the curved display device 1 is bent. long.

For example, in an actual situation, for example, a curved display device used in the field of curved screen televisions, the design of the flexible circuit board in this embodiment or other embodiments can support at least bending between the circuit modules. Increase the distance by at least 10 mm.

Further, when the flexible circuit board 100b of the foregoing embodiment is selected, since the first outer extension portion 121 is adjacent to the first slit 130, the structure of the inner fillet F is provided. Therefore, the stress generated by the bending between the first main extension 122 and the bridge portion 300 can be reduced when the curved display device 1 is bent. It can be understood that the user can adjust the design of the fillet F to be implemented in the flexible circuit board of different embodiments as needed, and is not limited thereto. In addition, the size of the fillet F may be selected and adjusted, and is not limited thereto.

Furthermore, the flexible circuit board used in this embodiment or other embodiments does not have a bend, and is designed as a flat structure. Therefore, in the case of bridging the circuit module, there is no problem of poor signal transmission, and the picture does not cause noise.

It can be seen from the above description that the flexible circuit board of the present invention is designed to connect the first circuit module and the first side of the first outer extension by the first main extension, and the first side of the first outer extension is connected. The first end of the bridging portion and the second connecting portion are respectively connected to the second end of the bridging portion and the second circuit module, so as to solve the flexible circuit board and the die-film packaging when applied to the curved display device The problem of cracking due to tension.

In addition, the structural design of the flexible circuit board plane does not cause the problem of poor signal transmission in the case of bridging the circuit module. What's more, when it is necessary to stack for shipment or inventory, the flexible circuit board will not be worn or broken due to being squeezed.

Although the embodiments of the present invention are described above, it is not intended to limit the present invention, and any one of ordinary skill in the art, without departing from the spirit and scope of the present invention, The construction, the features, and the spirit of the invention are subject to change. Therefore, the scope of the invention is defined by the scope of the appended claims.

41‧‧‧First Circuit Module

42‧‧‧Second circuit module

100a‧‧‧Soft circuit board

110‧‧‧First connection

120‧‧‧First Extension

121‧‧‧First outer extension

121a‧‧‧ first side

122‧‧‧First main extension

130‧‧‧First slot

210‧‧‧Second connection

300‧‧‧Bridge

301‧‧‧ first end

302‧‧‧ second end

Claims (15)

A flexible circuit board for connecting a first circuit module and a second circuit module, the flexible circuit board comprising: a bridge portion having a first end and a second end; a first extension a first main extension and a first outer extension, the first outer extension has a first side, the first main extension and the first end are connected to the first side; a first connection And connecting the first main extension to an end of the first outer extension and the first circuit module; and a second connection connecting the second end and the second circuit module. The flexible circuit board of claim 1, wherein the bridge portion and the first main extension are separated to form a first slot. The flexible circuit board of claim 2, wherein the first outer extension has an inner fillet adjacent to the first slot. The flexible circuit board of claim 2, further comprising a second extension portion including a second outer extension portion, the second end portion connecting the second connection portion through the second outer extension portion. The flexible circuit board of claim 4, wherein the second extension further comprises a second main extension, the second outer extension has a second side, the second main extension and the The second end is connected to the second side. The flexible circuit board of claim 5, wherein the bridge portion and the second main extension are separated to form a second slot. The flexible circuit board of claim 6, wherein the first extension further comprises a first inner extension, the first main extension connecting the first connection through the first inner extension . The flexible circuit board of claim 7, wherein the first connecting portion and the first main extending portion are separated to form a first inner slit. The flexible circuit board of claim 7, wherein the first main extension and the The first connection portion is located on the same side of the first inner extension. The flexible circuit board of claim 7, wherein the second extension further comprises a second inner extension, the second main extension connecting the second connection through the second inner extension . The flexible circuit board of claim 10, wherein the second connecting portion and the second main extending portion are separated to form a second inner slit. The flexible circuit board of claim 10, wherein the second main extension and the second connection are located on the same side of the second inner extension. A curved display device comprises: a display module comprising a module front surface, a module back surface and a curved side edge, the module front surface and the module back surface facing each other, the curved side edge connecting the mold Between the front side of the module and the back of the module; a first circuit module and a second circuit module are respectively disposed on the back of the module; a plurality of connecting substrates, one end of the connecting substrate is connected to the front side of the module, The other ends of the connecting substrates are respectively connected to the first circuit module and the second circuit module, wherein the connecting substrates bypass the curved side edges; and the first to the twelfth items as claimed in the patent application The flexible circuit board according to any one of the preceding claims, wherein the first connecting portion is connected to the first circuit module, and the second connecting portion is connected to the second circuit module. The curved display device of claim 13, wherein the first main extension is curved away from a direction of the display module. The curved display device of claim 13, wherein the connecting substrates comprise a die-film package.