CN218450660U - Flexible circuit board and display device - Google Patents
Flexible circuit board and display device Download PDFInfo
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- CN218450660U CN218450660U CN202221609007.XU CN202221609007U CN218450660U CN 218450660 U CN218450660 U CN 218450660U CN 202221609007 U CN202221609007 U CN 202221609007U CN 218450660 U CN218450660 U CN 218450660U
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Abstract
An embodiment of the utility model provides a flexible circuit board, display device, this flexible circuit board includes: a body having at least one device disposed on a front surface thereof, the at least one device including an edge device located at an edge of the body; the edge reinforcing structure is arranged on the back of the body and covers the orthographic projection of the edge device on the body; the first back adhesive is positioned on the back of the body, the first back adhesive is not overlapped with the edge reinforcing structure and the edge area in the orthographic projection of the body, the edge area is an area between a first edge of the edge device and the corresponding edge of the body, and the width of the edge area is smaller than the minimum setting width of the first back adhesive; the second back glue covers the reinforcing structure at least, the second back glue and the first back glue are in the orthographic projection of the body is not overlapped, and the thickness of the second back glue is smaller than that of the first back glue.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a flexible circuit board, display device.
Background
In the display device, a flexible circuit board is indispensable as an important component for connecting the display panel and the main board.
When assembling the display device, the flexible circuit board is generally bound with the display panel and adhered to the back surface of the display panel, which requires to set a back adhesive on the back surface (i.e. non-device surface) of the flexible circuit board; and in order to carry out effective support to the device that the flexible circuit board openly arranged, need set up the reinforcement structure in the back of flexible circuit board and the relative region of device usually, but the reinforcement structure has certain thickness, in order to reduce the height behind the attached gum of reinforcement structure and the difference in height behind the attached gum of region around, can attach the thinner gum of thickness on the reinforcement structure usually, this just makes reinforcement structure edge to have the less gum of width between flexible circuit board edge, when tearing off the gum protection film on the flexible circuit board like this, the less gum of width easily takes place the perk, and then the adhesion is on the device to the flexible circuit board next door, there is the bad problem of excessive glue after leading to the flexible circuit board assembly.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a flexible circuit board, display device for solve the above-mentioned problem that exists among the prior art.
In a first aspect, to solve the above technical problem, an embodiment of the present invention provides a flexible circuit board, including:
a body having at least one device disposed on a front side of the body, the at least one device including an edge device located at an edge of the body;
the edge reinforcing structure is arranged on the back of the body and covers the orthographic projection of the edge device on the body;
the first back adhesive is positioned on the back of the body, the first back adhesive is not overlapped with the edge reinforcing structure and the edge area in the orthographic projection of the body, and the edge area is an area between the first edge of the edge device and the corresponding edge of the body;
the second back glue at least covers the reinforcing structure, the second back glue and the first back glue are not overlapped with each other in the orthographic projection of the body, and the thickness of the second back glue is smaller than that of the first back glue.
In a possible embodiment, the second adhesive backing also covers the edge region.
In a possible embodiment, the edge-reinforcing structure also covers the edge region.
In a possible embodiment, the minimum setting width is 3mm.
In a possible embodiment, the body comprises:
a binding part, a sticking part and a connecting part which are arranged in sequence along a first direction; binding portion is used for binding with display panel, first gum with the second gum is located paste the portion, connecting portion are used for the electricity to connect the mainboard, be close to in the connecting portion paste one side of portion and have the bending region.
One possible implementation further includes:
and the anti-warping structure is positioned on the back of the connecting part.
In one possible embodiment, the warpage prevention structure includes:
a metal mesh overlapping the inflection region.
In one possible embodiment, the metal grid comprises a grid of copper.
One possible embodiment is that the connecting portion further includes a connecting element, the connecting element is located at an end of the connecting portion far away from the bending area, the connecting element is used for connecting a corresponding communication interface in the motherboard, and the anti-warping structure includes:
and the third back adhesive is positioned in a partial area of the connecting part close to the connecting piece.
One possible implementation further includes:
the electromagnetic interference prevention structure is only positioned on the back surface of the body.
In a second aspect, an embodiment of the present invention provides a display device, including:
a display panel;
a main board;
the flexible circuit board according to the first aspect, the flexible circuit board being connected between the display panel and the main board.
The utility model discloses beneficial effect as follows:
the utility model provides an in the embodiment, because attached first gum and the edge reinforcement structure at the body back of flexible circuit board, and the first edge of edge reinforcement structure corresponds the first region that the width is less than first gum at the orthographic projection of body each other overlap between the edge with the body, make first gum not cover the less first region of width, back in the display device is assembled to flexible circuit board like this, when taking off the gum protection film of first gum, the condition of gum perk just can not appear in the first region, just can not cause overflow glue bad yet.
Drawings
Fig. 1 is a schematic structural diagram of a flexible circuit board according to the present invention;
fig. 2 is a schematic structural diagram of another flexible circuit board provided by the present invention;
fig. 3 is a schematic structural diagram of another flexible circuit board provided by the present invention;
fig. 4 is a schematic structural diagram of a flexible circuit board according to the present invention;
fig. 5 and fig. 6 are schematic position diagrams of the anti-warping structure provided by the present invention;
fig. 7 is a schematic distribution diagram of the electromagnetic shielding structure in the back surface of the flexible printed circuit board body according to the present invention;
fig. 8 is a schematic view of the front surface of the flexible printed circuit board of the present invention.
Reference numerals:
Detailed Description
An embodiment of the utility model provides a flexible circuit board, display device for solve above-mentioned problem.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words for expressing the position and direction described in the present invention are all the explanations given by taking the drawings as examples, but can be changed according to the needs, and the changes are all included in the protection scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship and do not represent true proportions.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of other ways than those described herein, and those skilled in the art will be able to make similar generalizations without departing from the spirit of the invention. The invention is therefore not limited to the specific embodiments disclosed below. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The scope of the present application is to be considered as defined by the appended claims.
The following describes a flexible circuit board and a display device provided by embodiments of the present invention in detail with reference to the accompanying drawings.
Please refer to fig. 1 for a schematic structural diagram of a flexible circuit board provided by the present invention, the flexible circuit board includes:
the device comprises a body 1, wherein at least one device is arranged on the front surface of the body 1, and the at least one device comprises an edge device 2 positioned at the edge of the body 1; the device may be a driving device, a memory device, etc. disposed on the front surface of the flexible circuit board, and a device disposed near the edge of the flexible circuit board is referred to as an edge device 2.
The edge reinforcing structure 3 is arranged on the back of the body 1 and covers the orthographic projection of the edge device 2 on the body 1; in a flexible circuit board, a reinforcement structure is generally required to be provided for a device with a larger area (for example, a device with an area larger than a set threshold) for supporting a corresponding device, the reinforcement structure is generally provided on the back surface of the flexible circuit board body 1 corresponding to the corresponding device, and the material of the reinforcement structure may be stainless steel (SUS) or Polyimide (PI); for convenience of description in the present embodiment, the reinforcing structure provided for the edge device 2 is referred to as an edge reinforcing structure 3.
The first back adhesive 4 is positioned on the back of the body 1, the first back adhesive 4, the edge reinforcing structure 3 and the edge area are not overlapped with each other in the orthographic projection of the body 1, the edge area A is an area between a first edge a of the edge device 2 and the corresponding edge b of the body 1, and the width d of the edge area A is smaller than the minimum setting width of the first back adhesive 4;
the minimum setting width may be 3mm. As shown in fig. 1, if the distance d between the first edge a of the edge device 2 and the corresponding edge b of the flexible circuit board body 1 is less than 3mm, the first back adhesive 4 and the edge reinforcing structure 3 and the orthogonal projection of the edge area on the body 1 are overlapped complementarily, i.e. the first back adhesive 4 does not cover the edge reinforcing structure 3 and the edge area. Of course, the minimum setting width may be set to other values according to actual needs, and is not limited herein.
The second back glue 5 at least covers the reinforcing structure, and the orthographic projections of the second back glue 5 and the first back glue 4 on the body 1 are not overlapped. Fig. 1 is an example of the orthographic projection of the second back adhesive 5 and the reinforcing structure on the main body 1 of the flexible circuit board.
Usually, a certain gap is formed between the first back glue 4 and the second back glue 5, and the width of the gap is usually 1mm, so that the fit tolerance of the back glue can be matched, and the removal of the protective film of the back glue after assembly is facilitated; in addition, the thickness of the second back adhesive 5 is smaller than that of the first back adhesive 4, so that the height difference between the first back adhesive 4 and the second back adhesive 5 after being attached can be reduced. In fig. 1, 2 removal directions (J) of the first adhesive backing 4 are shown 1 、J 2 ) I.e. can be along J 1 The first back glue 4 is removed along the direction, and can also be along J 2 The first back adhesive 4 is removed in the direction. The removal direction of the second adhesive 5 may be the same as or different from the removal direction of the first adhesive 4.
It should be understood that the first adhesive tape 4 and the second adhesive tape 5 may be regarded as double-sided adhesive tapes, and when the flexible circuit board is produced, one side of the double-sided adhesive tape is attached to the back side of the flexible circuit board, and the other side of the double-sided adhesive tape is retained with an adhesive tape protection film; when the flexible circuit board is assembled on a display panel of the display device, the back adhesive protective film on the other side of the double-sided adhesive is removed, and the flexible circuit board is adhered to the display panel through the double-sided adhesive to fix the flexible circuit board.
The utility model provides an in the embodiment, because attached first gum 4 and the edge reinforcement structure 3 at the 1 back of body of flexible circuit board, and the first edge of edge reinforcement structure 3 corresponds the first region that the width is less than the minimum width that sets up of first gum 4 at the orthographic projection of body 1 each other overlap with body 1 between the edge, make first gum 4 not cover the less first region of width, flexible circuit board assembles back in the display device like this, when taking off first gum 4's gum protection film, just can not appear the condition of gum perk in the first region, just can not cause overflow and glue badly yet.
Please refer to fig. 2, which is a schematic structural diagram of another flexible circuit board according to the present invention.
The second backing adhesive 5 also covers the edge area.
The utility model provides an in the embodiment, through letting second gum 5 cover reinforcement structure and the less border region of width simultaneously, can laminate border region and display panel when assembling flexible circuit, can prevent again to produce the gum width and be less than the minimum region that sets up the width, prevent to appear the perk because of gum width undersize and cause the excessive glue bad.
Fig. 3 is a schematic structural diagram of another flexible printed circuit board according to the present invention.
The edge reinforcing structure 3 also covers the edge area.
As shown in fig. 3, the areas with the filling points are all the areas covered by the edge reinforcing structure 3, and the area surrounded by the dotted line in fig. 3 is the front projection area of the edge device 2 (the edge device 2 is disposed on the front side of the flexible circuit board, and fig. 3 is the back side of the flexible circuit board).
The utility model discloses in, through letting edge reinforcement structure 3 both cover the orthographic projection region of edge device 2, cover marginal region again, first gum 4 covers the region outside the reinforcement structure like this, and second gum 5 covers the back wall structure, and the two each other non-overlapping to can prevent to appear the perk because of gum width undersize and cause the excessive glue bad.
Fig. 4 is a schematic structural diagram of a flexible circuit board body 1 according to the present invention.
a binding portion 11, an adhesive portion 12, and a connecting portion 13 arranged in this order in the first direction X; the binding portion 11 is used for binding with the display panel, the first adhesive tape 4 and the second adhesive tape 5 are located on the pasting portion 12, the connecting portion 13 is used for electrically connecting a main board (not shown in fig. 4), and a bending region B is arranged on one side of the connecting portion 13 close to the pasting portion 12.
Please refer to fig. 5 and fig. 6, which are schematic position diagrams of the anti-warping structure provided by the present invention.
The flexible circuit board further comprises an anti-warping structure 6 located on the back of the connecting portion.
As shown in fig. 5, in some embodiments, the anti-warping structure, which may be a metal mesh, overlaps the bending region B. The metal grid may completely or partially overlap the bending region B, while the metal grid may also extend in the first direction X into the non-bending region of the connection portion 13.
The metal grid can be soft metal grid, such as grid copper, grid zinc and the like.
The shape of the single mesh in the metal grid can be square, round, regular hexagon and the like.
The utility model discloses in, through setting up the metal mesh at district B of buckling, can utilize the net copper to absorb the warpage behind the flexible circuit board buckles bad to it is bad to improve the warpage. The metal grid is set to be grid copper, so that the metal grid can be formed under the condition of not adding other materials, and cost control is facilitated.
In other embodiments, as shown in fig. 6, the connecting portion 13 further includes a connecting member 7 located at an end of the connecting portion 13 away from the bending region B, where the connecting member 7 is used to connect to the corresponding communication interface warpage preventing structure 6 in the motherboard, and may be a third adhesive tape located in a partial region of the connecting portion close to the connecting member 7.
The third adhesive may be made of the same material as the first adhesive 4 and the second adhesive 5.
The utility model provides an in the embodiment, through set up the proof warp structure at the back of connecting portion, can reduce the flexible circuit board and appear the probability of perk after the district of buckling is buckled, or reduce the range of perk to be convenient for the customer assembles the flexible circuit board to display device, it is bad to improve the warpage of flexible circuit board.
It should be noted that, in fig. 1 to 6, for the convenience of understanding, the edge device 2 shown therein is not actually disposed on the back of the body 1 shown in fig. 1 to 6, and can be understood as an orthographic projection of the edge device 2 on the back of the body 1.
Referring to fig. 7 and 8, fig. 7 is a schematic view illustrating a distribution of the electromagnetic shielding structure in the back of the flexible circuit board body 1 according to the present invention, and fig. 8 is a schematic view illustrating the front of the flexible circuit board body 1 according to the present invention.
The flexible circuit board further comprises an electromagnetic interference preventing structure 8 which is only positioned on the back surface of the body 1. The front surface (as shown in fig. 8) of the flexible circuit board body 1 is not provided with the electromagnetic interference prevention structure 8, so that the cost of the flexible circuit board can be effectively reduced.
It should be understood that the electromagnetic shielding structure does not cover the conductive bodies such as devices, holes, pads, etc. or the light-transmitting holes on the flexible circuit board.
For the convenience of viewing in fig. 7, the first adhesive backing 4 and the second adhesive backing 5 are not shown in fig. 7, and when the anti-warping structure 6 is a metal mesh, the metal mesh may cover both the front and back surfaces of the bending region B in the connection portion 13 of the flexible circuit board.
The utility model discloses in, set up anti-electromagnetic structure 8 through only at the 1 back of body of flexible circuit board, can make the flexible circuit board have electromagnetic interference resistance's function, compare in corresponding technique in the front of flexible circuit board and the scheme of the reverse side electromagnetic structure 8 of all seting up defences, can effectual reduction flexible circuit board's manufacturing cost to promote the competitiveness of product.
Based on same utility model the design, the embodiment of the utility model provides a display device, this display device includes:
a display panel; the display panel may be a liquid crystal display panel, or may be an Organic Light Emitting Diode (OLED) display panel.
A main board;
the flexible circuit board as described above, which is connected between the display panel and the main board.
The display device can be mobile devices such as a mobile phone, a tablet computer, a notebook computer and a wearable intelligent display device.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A flexible circuit board, comprising:
a body having at least one device disposed on a front surface thereof, the at least one device including an edge device located at an edge of the body;
the edge reinforcing structure is arranged on the back of the body and covers the orthographic projection of the edge device on the body;
the first back adhesive is positioned on the back of the body, the first back adhesive is not overlapped with the edge reinforcing structure and the edge area in the orthographic projection of the body, the edge area is an area between the first edge of the edge device and the corresponding edge of the body, and the width of the edge area is smaller than the minimum setting width of the first back adhesive;
and the second back glue at least covers the reinforcing structure, and the second back glue and the first back glue are not overlapped with each other in the orthographic projection of the body.
2. The flexible circuit board of claim 1, wherein the second adhesive also covers the edge region.
3. The flexible circuit board of claim 1, wherein the edge reinforcing structure further covers the edge region.
4. A flexible circuit board according to any one of claims 1-3, characterized in that the minimum set width is 3mm.
5. The flexible circuit board of any one of claims 1-3, wherein the body comprises:
a binding part, an adhering part and a connecting part which are arranged in sequence along a first direction; binding portion is used for binding with display panel, first gum with the second gum is located paste the portion, connecting portion are used for the electricity to connect the mainboard, be close to in the connecting portion paste one side of portion and have the bending region.
6. The flexible circuit board of claim 5, further comprising:
and the anti-warping structure is positioned on the back of the connecting part.
7. The flexible circuit board of claim 6, wherein the anti-warp structure comprises:
a metal mesh overlapping the inflection region.
8. The flexible circuit board of claim 7, wherein the metal mesh comprises mesh copper.
9. The flexible circuit board of claim 6, wherein the connecting portion further comprises a connecting member located at an end of the connecting portion away from the bending region, the connecting member being configured to connect to a corresponding communication interface in the motherboard;
the anti-warping structure comprises:
and the third back adhesive is positioned in a partial area of the connecting part close to the connecting piece.
10. The flexible circuit board of any one of claims 1-3 and 6-9, further comprising:
the electromagnetic interference prevention structure is only positioned on the back surface of the body.
11. A display device, comprising:
a display panel;
a main board;
the flexible circuit board of any one of claims 1-10, connected between the display panel and the motherboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221609007.XU CN218450660U (en) | 2022-06-23 | 2022-06-23 | Flexible circuit board and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221609007.XU CN218450660U (en) | 2022-06-23 | 2022-06-23 | Flexible circuit board and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218450660U true CN218450660U (en) | 2023-02-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221609007.XU Active CN218450660U (en) | 2022-06-23 | 2022-06-23 | Flexible circuit board and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218450660U (en) |
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2022
- 2022-06-23 CN CN202221609007.XU patent/CN218450660U/en active Active
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