CN111399689A - Flexible circuit board, display screen and touch screen - Google Patents
Flexible circuit board, display screen and touch screen Download PDFInfo
- Publication number
- CN111399689A CN111399689A CN202010326578.1A CN202010326578A CN111399689A CN 111399689 A CN111399689 A CN 111399689A CN 202010326578 A CN202010326578 A CN 202010326578A CN 111399689 A CN111399689 A CN 111399689A
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- line
- metal
- metal wire
- bending line
- carrier plate
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Structure Of Printed Boards (AREA)
Abstract
The invention is suitable for the field of flexible circuit boards, and provides a flexible circuit board, a display screen and a touch screen, wherein the flexible circuit board comprises: the flexible substrate is divided into a first carrier plate and a second carrier plate by a bending line and can be bent at the bending line; the metal wire comprises a first metal wire arranged on the first carrier plate, a second metal wire arranged on the second carrier plate and a connecting metal wire connected with the first metal wire and the second metal wire, wherein the connecting metal wire passes through the bending line, and the tangent line at the bending line is not perpendicular to the bending line. The flexible circuit board provided by the invention can effectively reduce the probability of breakage of the metal lead at the bending part of the flexible substrate and improve the product quality.
Description
Technical Field
The invention belongs to the field of flexible circuit boards, and particularly relates to a flexible circuit board, a display screen and a touch screen.
Background
The existing display screen/touch screen comprises a main circuit board and a control circuit board, wherein the control circuit board is electrically connected with the main circuit board. The main circuit board is provided with a circuit module corresponding to the display or touch control function, and the control circuit board is provided with an integrated circuit module for controlling the display or touch control function. The main body circuit board and the control circuit board are two independent components and are connected through an FOG process. Referring to fig. 1 and 2, if the main circuit board 1 and the control circuit board 2 are designed integrally, the main circuit board 1 and the control circuit board 2 need to use a flexible substrate 3 as a carrier, and the substrate 3 can be folded and placed on one side of the main circuit board 1 to reduce the edge space occupied by the display screen/touch screen BM area. The metal wire 4 at the bending part is perpendicular to the bending line, and the metal wire 4 is easily broken when the substrate 3 is bent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a flexible circuit board, a display screen and a touch screen, which aim to reduce the probability that metal wires are easy to break at the bent part of a substrate.
A flexible circuit board comprising:
the flexible substrate is divided into a first carrier plate and a second carrier plate by a bending line and can be bent at the bending line;
the metal wire comprises a first metal wire arranged on the first carrier plate, a second metal wire arranged on the second carrier plate and a connecting metal wire connected with the first metal wire and the second metal wire, wherein the connecting metal wire passes through the bending line, and the tangent line at the bending line is not perpendicular to the bending line.
Optionally, the connecting metal line is a straight line.
Optionally, the metal wires are multiple and arranged at intervals.
Optionally, an included angle of the intersection between the connecting metal line of each metal wire and the bending line gradually decreases from the midpoint of the bending line to both ends of the bending line.
Optionally, the connecting metal wire and the first metal wire form an obtuse angle, and the connecting metal wire and the second metal wire form an obtuse angle.
Optionally, the flexible substrate is in arc transition at a connection position of the first carrier and the second carrier.
Optionally, the connecting metal wire is a wavy wire.
Optionally, the connecting metal wire is a broken line formed by connecting a plurality of line segments which are not on the same straight line in an ending manner.
A display screen, comprising:
the flexible substrate is divided into a first carrier plate and a second carrier plate by a bending line, and the second carrier plate can be bent at the bending line;
the display circuit is arranged on the first carrier plate and comprises a first metal wire with a first connecting end point;
the control circuit is arranged on the second carrier plate and comprises a second metal wire with a second connection end point; (ii) a
And the connecting metal wire is arranged on the flexible substrate and used for connecting the first connecting end point and the second connecting end point, passes through the bending line, and the tangent of the connecting metal wire passing through the bending line is not perpendicular to the bending line.
A touch screen, comprising:
the flexible substrate is divided into a first carrier plate and a second carrier plate by a bending line, and the second carrier plate can be bent at the bending line;
the touch control circuit is arranged on the first carrier plate and comprises a third metal wire with a third connecting endpoint;
the control circuit is arranged on the second carrier plate and comprises a fourth metal wire with a fourth connection endpoint;
and the connecting wire is arranged on the flexible substrate and is used for connecting the third connecting endpoint and the fourth connecting endpoint, the connecting wire passes through the bending line, and the tangent line of the connecting wire passing through the bending line is not perpendicular to the bending line.
The flexible circuit board provided by the invention can effectively reduce the probability of breakage of the metal lead at the bending part of the flexible substrate and improve the product quality.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a display/touch screen for background reference;
FIG. 2 is a partial schematic view of a display/touch screen for background reference;
fig. 3 is a partial schematic view of a flexible circuit board according to an embodiment of the present application;
fig. 4 is a second partial schematic view of a flexible circuit board according to an embodiment of the present application;
fig. 5 is a third partial schematic view of a flexible circuit board according to an embodiment of the present application;
fig. 6 is a fourth partial schematic view of a flexible circuit board according to an embodiment of the present application.
Wherein, in fig. 1 to 2, the respective reference numerals:
1. a main body circuit board; 2. a control circuit board; 3. a substrate; 4. a metal wire.
The respective reference numerals in fig. 3 to 6:
10. a flexible substrate; 11. a first carrier plate; 12. a second carrier plate; 21. a first metal line; 22. connecting metal wires; 23. a second metal line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 3 to 6, the present embodiment provides a flexible circuit board, which includes a flexible substrate 10 and a metal wire disposed on the flexible substrate 10.
The flexible substrate 10 is divided into a first carrier 11 and a second carrier 12 by a bending line, and can be bent at the bending line.
The metal wire includes a first metal line 21 disposed on the first carrier 11, a second metal line 23 disposed on the second carrier 12, and a connecting metal line 22 connecting the first metal line 21 and the second metal line 23, wherein the connecting metal line 22 passes through the bending line, and a tangent line passing through the bending line is not perpendicular to the bending line.
Fig. 2 is a partial schematic view of a display screen for background reference at a turning position, in which a dotted line is a position of a bending line in the view, and a metal wire 4 disposed on a substrate 3 is perpendicular to the bending line at a connection position with the bending line, so that when the control circuit board 2 is turned relative to the main circuit board 1, the metal wire 4 is easily broken at a position crossing the bending line.
Fig. 3 shows a partial schematic view of a flexible circuit board provided in this embodiment, in which the dotted line is the position of a bending line, a first metal line 21 disposed on the first carrier 11 and a second metal line 23 disposed on the second carrier 12 are connected by a connecting metal line 22, the connecting metal line 22 is a straight line, and the connecting metal line 22 passes through the bending line and is not perpendicular to the bending line.
Fig. 5 shows a partial schematic view of another flexible circuit board, in which the dotted line is the position of a bending line, a first metal line 21 disposed on the first carrier 11 and a second metal line 23 disposed on the second carrier 12 are connected by a connecting metal line 22, the connecting metal line 22 is a folding line formed by connecting a plurality of line segments that are not on the same straight line, the connecting metal line 22 passes through the bending line, and the intersection of the connecting metal line 22 and the bending line is not perpendicular.
Fig. 6 shows a partial schematic view of another flexible printed circuit board, in which the dotted line is the position of a bending line, a first metal line 21 disposed on a first carrier and a second metal line 23 disposed on a second carrier are connected by a connecting metal line 22, the connecting metal line 22 is a curve, the connecting metal line 22 passes through the bending line, and a tangent line passing through the bending line is not perpendicular to the bending line.
From the above, fig. 3, 5 and 6 show the shape of the connecting wires 22, the commonality of which is that the connecting wires 22 pass through the bend line, and the tangent thereof where it passes through the bend line is not perpendicular to the bend line. Because the connecting metal wire 22 is not perpendicular to the bending line, when the second carrier 12 bends at the bending line relative to the first carrier 11, the stress applied to the connecting metal wire 22 can be released to both sides, thereby reducing the probability of metal wire breakage and reducing the fraction defective of products. It should be noted that the shapes of the connecting wires 22 shown in fig. 3, 5 and 6 are only schematic, and those skilled in the art can set the shapes and positions of the connecting wires 22 according to actual needs, as long as the connecting wires pass through the bending line and the tangent line at the intersection of the connecting wires and the bending line is not perpendicular to the bending line.
By the analysis, the flexible circuit board provided by the embodiment can effectively reduce the probability of breakage of the metal lead at the bending part of the flexible substrate 10, and improves the product quality.
The effect of the specific shape of the connecting metal line 22 on reducing the probability of breakage of the metal wire at the bend is analyzed in conjunction with the drawings.
The connecting wire 22 shown in fig. 3 is a straight line and is the basic design.
The connecting metal wire 22 shown in fig. 5 is a folding line, when the second carrier plate 12 is bent relative to the first carrier plate 11, the connecting metal wire 22 is designed as a multi-segment folding line, which can release stress to both sides of the folding line, and simultaneously the connecting metal wire 22 can resolve partial stress through self stretching along with the bending of the second carrier plate 12, thereby further reducing the risk of fracture, and meanwhile, due to the adoption of the multi-segment folding line, the connecting metal wire 22 can be designed at the bending position, the included angle between the connecting metal wire 22 in the folding line form and the folding line is smaller, and simultaneously, the space span of the whole connecting metal wire 22 in the direction of the folding line is smaller than that of the connecting metal wire 22 in the straight line design, thereby being beneficial to effective utilization of space.
The connecting wire 22 shown in fig. 6 is a curved line, illustrated as a wavy line. One skilled in the art may also provide the connecting wire 22 as a circular arc line of a single curvature, a spline line sequentially connected by a plurality of arc segments of curvature, or a wavy line sequentially connected by a plurality of arc segments of curvature. When the second carrier 12 is bent relative to the first carrier 11, the connecting wires 22 are designed to be curved, so that the stress can be released to two bending lines, and meanwhile, the connecting wires 22 can absorb part of the stress by self-stretching along with the bending of the second carrier 12. It should be noted that when connecting the wavy lines of the metal lines 22, the peaks and valleys of the connecting metal lines 22 are both avoided from the bending line, so as to satisfy the requirement that the tangent line of the connecting metal lines 22 at the intersection of the bending line is not perpendicular to the bending line. When the connecting wire 22 has other curves, similarly, a point where the curvature of the connecting wire 22 is equal to zero is avoided from the bending line. Similarly, due to the curve design, as the wavy line design in this embodiment indicates, the connecting metal 22 in the form of a curve can be designed at the bending position, the included angle between the connecting metal 22 and the bending line is smaller, and the spatial span of the whole connecting metal 22 in the direction of the bending line is smaller than that of the connecting metal 22 designed in a straight line, which is beneficial to the effective utilization of space.
The connecting metal lines 22 are further optimized in the following with reference to fig. 3 and 4.
Referring to fig. 3, the connecting metal line 22 is a straight line, and the connecting metal line 22 and the first metal line 21 form an obtuse angle, and the connecting metal line 22 and the second metal line 23 form an obtuse angle. The connection wire 22 may be regarded as a chamfer of the first and second wires 21 and 23. This arrangement facilitates a smooth transition of the first metal line 21 and the second metal line 23. In other embodiments, the included angle between the first metal line 21 and the connecting metal line 22 may also be an acute angle, in which case, two ends of the first metal line 21 are located at two sides of the extending direction of the second metal line 23, and the connecting metal line 22 connects to one end point of the first metal line 21 and is folded toward the second metal line 23 to form an acute angle. Similarly, in another embodiment, the angle between the second metal line 23 and the connecting metal line 22 may be an acute angle.
In another embodiment of the present application, the angle a between the connecting wire 22 and the bend line is between 10 ° and 75 °. It is further preferred that the angle a of the connecting wires 22 to the bend line is between 10 ° and 40 °. The angle a between the connecting wire 22 and the bending line may be further preferably 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, etc., which is not limited herein. The selection of this interval makes the connecting metal wire 22 tend to be relaxed, which is beneficial to release the stress of the connecting metal wire 22 at the bending line to both sides, thereby further reducing the risk of breaking the metal wire.
In another embodiment of the present application, referring to fig. 3, a plurality of metal wires are disposed at intervals. The metal wires are arranged at intervals to avoid interference among the metal wires. The metal wires are arranged at intervals, which means that the first metal wires 21 are arranged at intervals, the second metal wires 23 are arranged at intervals, the connecting metal wires 22 are arranged at intervals, and the first metal wires 21, the second metal wires 23 and the connecting metal wires 22 are correspondingly connected. A person skilled in the art may arrange the first metal lines 21 at equal or unequal intervals, arrange the second metal lines 23 at equal or unequal intervals, and arrange the connecting metal lines 22 at equal or unequal intervals, which is not limited herein.
In another embodiment of the present application, referring to fig. 3, an included angle a between the connecting metal line 22 of each metal conductive line and the bending line is gradually decreased from the midpoint of the bending line to the two ends. In the structure shown in the figure, the metal wires are divided into three wires which are respectively arranged on the left and the right and are symmetrical left and right by a central line which is vertical to the bending line. The intersection angle a between each connecting metal wire 22 and the bending line is gradually decreased from the middle to both sides, that is, the intersection angle a between the connecting metal wire 22 located at the outer side and the bending line is smaller than the intersection angle a between the connecting metal wire 22 located at the inner side and the bending line, and the distribution is suitable for the stress distribution of the bending line when the second carrier plate 12 is bent, so that the stress of each metal wire is uniform as a whole, and the spatial distribution and utilization are facilitated.
In another embodiment of the present application, referring to fig. 4, the flexible substrate 10 is in an arc transition at the connection between the first carrier 11 and the second carrier 12. The arrangement can reduce the stress concentration of the first carrier 11 and the second carrier 12, and effectively reduce the stress applied to the metal wires by the flexible substrate 10, thereby further reducing the risk of breaking the metal wires. In addition, because the original right-angle transition is replaced by the arc transition, the length of the bending line is increased, and the included angle between the connecting metal wire 22 and the bending line can be more relaxed, so that the stress is released to the two sides of the bending line. In addition, the arc transition enables each connecting metal wire 22 to have a larger arrangement space, so that the overall stress is uniform.
Example two
The embodiment provides a display screen, which comprises a flexible substrate, and a display circuit, a control circuit and a connecting metal wire which are fixed on the flexible substrate. The display screen provided by the embodiment is the case that the flexible circuit board provided by the embodiment is applied to the display screen.
The existing display screen comprises a main body circuit board and a control circuit board, wherein the main body circuit board comprises a display substrate and a display circuit fixed on the display substrate, the control circuit board comprises a control substrate and a control circuit fixed on the control substrate, the main body circuit board and the control circuit board are integrally arranged, namely the display substrate and the control substrate are integrally arranged into a flexible substrate, and the display circuit and the control circuit are connected through a connecting metal wire and are arranged on the flexible substrate.
In this embodiment, the display substrate becomes the first carrier board and the control substrate becomes the second carrier board in the first embodiment. The second carrier plate can be bent at the bending position.
The display circuit is arranged on the first carrier plate and comprises a first metal wire with a first connection end point, the control circuit is arranged on the second carrier plate and comprises a second metal wire with a second connection end point, and the connection metal wire is arranged on the display substrate and is used for connecting the first connection end point and the second connection end point. The first metal line, the second metal line and the connecting metal line are connected to form the metal wire in the first embodiment.
The connecting metal wire passes through the bending line, and the tangent line of the connecting metal wire passing through the bending line is not perpendicular to the bending line. Based on the analysis of the first embodiment, the display screen provided by the present embodiment can also achieve the technical effect of reducing the probability that the connection metal wire is easily broken at the bending position of the flexible substrate, and details are not further described herein.
EXAMPLE III
The embodiment provides a touch screen, which comprises a flexible substrate, and a touch circuit, a control circuit and a connecting wire which are fixed on the flexible substrate. The touch screen provided by the embodiment is the case that the flexible circuit board provided by the first embodiment is applied to the touch screen.
The existing touch screen comprises a main circuit board and a control circuit board, wherein the main circuit board comprises a touch substrate and a touch circuit fixed on the touch substrate, the control circuit board comprises a control substrate and a control circuit fixed on the control substrate, the main circuit board and the control circuit board are integrally arranged, namely the main circuit board and the control substrate are integrally arranged into a flexible substrate, and the touch circuit is connected with the control circuit through a connecting wire and is arranged on the flexible substrate.
In this embodiment, the main circuit board becomes the first carrier board in the first embodiment, the control substrate becomes the second carrier board in the first embodiment, and the second carrier board can be bent at the bending position.
The touch control circuit is arranged on the first carrier plate and comprises a third metal wire with a third connecting endpoint. The control circuit is arranged on the second carrier plate and comprises a fourth metal wire with a fourth connection endpoint. The connecting wire is used for connecting the third connecting terminal and the fourth connecting terminal.
The connecting wire passes through the bending line, and the tangent line of the connecting wire passing through the bending line is not perpendicular to the bending line.
Based on the analysis of the first embodiment, the touch screen provided by the present embodiment can also achieve the technical effect of reducing the probability that the metal wire is easily broken at the bending position of the flexible substrate, and details are not further described herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A flexible circuit board, comprising:
the flexible substrate is divided into a first carrier plate and a second carrier plate by a bending line and can be bent at the bending line;
the metal wire comprises a first metal wire arranged on the first carrier plate, a second metal wire arranged on the second carrier plate and a connecting metal wire connected with the first metal wire and the second metal wire, wherein the connecting metal wire passes through the bending line, and the tangent line at the bending line is not perpendicular to the bending line.
2. The flexible circuit board of claim 1, wherein the connection metal lines are straight lines.
3. The flexible circuit board according to claim 2, wherein the connecting metal line forms an obtuse angle with the first metal line and an obtuse angle with the second metal line.
4. The flexible circuit board of claim 1, wherein the connecting metal line is at an angle of 10 ° to 75 ° to the bend line.
5. The flexible circuit board of claim 1, wherein the metal leads are provided in plurality and spaced apart.
6. The flexible circuit board according to claim 5, wherein an angle at which the connection metal line of each of the metal wires intersects the bending line is gradually decreased from a midpoint of the bending line to both ends thereof.
7. The flexible circuit board of any one of claims 1 to 6, wherein the flexible substrate transitions in an arc at a junction of the first carrier board and the second carrier board.
8. The flexible circuit board according to claim 1, wherein the connecting metal line is a wavy line, or the connecting metal line is a broken line formed by connecting a plurality of line segments which are not collinear.
9. A display screen, comprising:
the flexible substrate is divided into a first carrier plate and a second carrier plate by a bending line, and the second carrier plate can be bent at the bending line;
the display circuit is arranged on the first carrier plate and comprises a first metal wire with a first connecting end point;
the control circuit is arranged on the second carrier plate and comprises a second metal wire with a second connection end point; (ii) a
And the connecting metal wire is arranged on the flexible substrate and used for connecting the first connecting end point and the second connecting end point, passes through the bending line, and the tangent of the connecting metal wire passing through the bending line is not perpendicular to the bending line.
10. A touch screen, comprising:
the flexible substrate is divided into a first carrier plate and a second carrier plate by a bending line, and the second carrier plate can be bent at the bending line;
the touch control circuit is arranged on the first carrier plate and comprises a third metal wire with a third connecting endpoint;
the control circuit is arranged on the second carrier plate and comprises a fourth metal wire with a fourth connection endpoint;
and the connecting wire is arranged on the flexible substrate and is used for connecting the third connecting endpoint and the fourth connecting endpoint, the connecting wire passes through the bending line, and the tangent line of the connecting wire passing through the bending line is not perpendicular to the bending line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010326578.1A CN111399689A (en) | 2020-04-23 | 2020-04-23 | Flexible circuit board, display screen and touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010326578.1A CN111399689A (en) | 2020-04-23 | 2020-04-23 | Flexible circuit board, display screen and touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111399689A true CN111399689A (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010326578.1A Pending CN111399689A (en) | 2020-04-23 | 2020-04-23 | Flexible circuit board, display screen and touch screen |
Country Status (1)
| Country | Link |
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| CN (1) | CN111399689A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022109950A1 (en) * | 2020-11-26 | 2022-06-02 | 京东方科技集团股份有限公司 | Display substrate, display panel and display apparatus |
-
2020
- 2020-04-23 CN CN202010326578.1A patent/CN111399689A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022109950A1 (en) * | 2020-11-26 | 2022-06-02 | 京东方科技集团股份有限公司 | Display substrate, display panel and display apparatus |
| GB2615670A (en) * | 2020-11-26 | 2023-08-16 | Boe Technology Group Co Ltd | Display substrate, display panel and display apparatus |
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