CN114333560A - Display panel and circuit board - Google Patents
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- CN114333560A CN114333560A CN202111672346.2A CN202111672346A CN114333560A CN 114333560 A CN114333560 A CN 114333560A CN 202111672346 A CN202111672346 A CN 202111672346A CN 114333560 A CN114333560 A CN 114333560A
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Abstract
The application provides a display panel and flexible circuit board has solved among the prior art because of the too little lower problem of bonding reliability that leads to of bonding width. The display panel includes: the fan-out area is arranged on one side of the display area, a plurality of bonding pins are arranged in the fan-out area, each bonding pin comprises an end part close to the display area, and the end parts of the bonding pins are collinear; extension lines of the bonding pins in the length direction of the bonding pins respectively intersect at a plurality of points, and connecting lines of the points are parallel to connecting lines of the end parts.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a circuit board.
Background
With the ever-increasing functionality of display panels, the number of bonding pins in the fan-out area of a display panel has increased, resulting in bonding widths, i.e., the spacing between the center lines of adjacent bonding pins, being continually compressed. Thus, there is a problem in that the bonding width is excessively small, resulting in bonding anomalies, such as short circuits or open circuits, resulting in lower bonding reliability.
Content of application
In view of this, embodiments of the present application are directed to providing a display panel and a flexible circuit board, so as to solve the problem in the prior art that bonding reliability is low due to an excessively small bonding width.
A first aspect of the present application provides a display panel, comprising: the fan-out area is arranged on one side of the display area, a plurality of bonding pins are arranged in the fan-out area, each bonding pin comprises an end part close to the display area, and the end parts of the bonding pins are collinear; extension lines of the bonding pins in the length direction of the bonding pins respectively intersect at a plurality of points, and connecting lines of the points are parallel to connecting lines of the end parts.
In one embodiment, the length of the orthographic projection of the plurality of bonding pins is non-uniform in a direction perpendicular to the line of the ends.
In one embodiment, the width of the plurality of bonding pins is non-uniform in a direction parallel to the line of the end portions.
In one embodiment, the plurality of bonding pins are divided into a plurality of first type pin groups, the bonding pins in different first type pin groups are alternately arranged, and extension lines of the bonding pins in the same first type pin group in the length direction intersect at the same point.
In one embodiment, the inclination angle of the length direction of each of the bonding pins in the same first-type pin group relative to the end connecting line is gradually increased from two sides to the middle to 90 degrees.
In one embodiment, the bonding pins are divided into a plurality of second type pin groups, extension lines of the bonding pins in the same second type pin group in the length direction sequentially pass through a plurality of points, and the length directions of the bonding pins in the same second type pin group are parallel.
In one embodiment, adjacent bonding pins in the same second-type pin group are equally spaced in a direction parallel to the continuation of the end portions.
In one embodiment, the length of the orthographic projection of the plurality of bonding pins in the direction perpendicular to the line of the end portion varies periodically with the number of points; and/or the width of the plurality of bonding pins in a direction parallel to the line of the end portions varies periodically by the number of dots.
In one embodiment, the bonding pins are centrosymmetric, and the center lines of the bonding pins respectively intersect at a plurality of points.
A second aspect of the present application provides a flexible circuit board, including a bonding area, where the bonding area is provided with a plurality of bonding pins, and the bonding pins include end portions near an edge of the flexible circuit board, and the end portions of the plurality of bonding pins are collinear; extension lines of the bonding pins in the length direction of the bonding pins respectively intersect at a plurality of points, and connecting lines of the points are parallel to connecting lines of the end parts.
According to the display panel and the flexible circuit board provided by the application, the extending lines of the bonding pins in the respective length directions are arranged to intersect at a plurality of points respectively, and the bonding pins which intersect at the same point are inclined pairwise. Under this condition, when certain bonding pin on display panel and corresponding bonding pin on the flexible circuit board take place the dislocation in the direction of arranging of bonding pin, through with the direction vertically direction of arranging flexible circuit board or display panel that moves, the overlapping area between the bonding pin of adjustment dislocation to reduced because of the probability that bonding width undersize leads to the bonding abnormal problem, thereby improved bonding reliability.
Drawings
Fig. 1 is a schematic structural diagram of a display panel provided in the present application.
Fig. 2 is a schematic structural diagram of another display panel provided in the present application.
Fig. 3 is a schematic partial structure diagram of a display panel according to a first embodiment of the present application.
Fig. 4 is a schematic partial structure diagram of a display panel according to a second embodiment of the present application.
Fig. 5 is a schematic partial structure diagram of a display panel according to a third embodiment of the present application.
Fig. 6 is a schematic partial structure diagram of a display panel according to a fourth embodiment of the present application.
Fig. 7 is a schematic partial structure diagram of a display panel according to a fifth embodiment of the present application.
Fig. 8 is a schematic partial structure diagram of a display panel according to a sixth embodiment of the present application.
Fig. 9 is a schematic structural diagram of a bonding pin on a display panel in a curled state according to an embodiment of the present application.
Fig. 10 is a schematic partial structure diagram of a display panel according to a seventh embodiment of the present application.
Fig. 11 is a schematic structural diagram illustrating a bonding pin on a display panel in a curled state according to another embodiment of the present application.
Fig. 12 is a schematic partial structure diagram of a display panel according to an eighth embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a display panel. As shown in fig. 1, the display panel 10 includes a display area AA and a fan-out area BB disposed on one side of the display area AA, the fan-out area BB is provided with a plurality of bonding pins 11, and the bonding pins 11 are terminals for leading out circuits or wires and are used for connecting external circuits. In one example, bonding pin 11 is a gold finger or pad. Bonding pin 11 extends along vertical direction y, and a plurality of bonding pins 11 are arranged along horizontal direction x in parallel.
Bonding pin 11 points from display area AA to non-display area BB, i.e. bonding pin 11 has a distinct extending direction, which is the length direction of the bonding pin. The specific shape of bonding pin 11 may be set according to actual needs, for example, parallelogram (including rectangle), trapezoid, triangle, etc. In one example, bonding pin 11 is a centrosymmetric pattern, and the center lines of bonding pins 11 are parallel. The embodiments of the present application are described with reference to parallelogram-shaped bonding pins 11 as an example.
Those skilled in the art will appreciate that the bonding pins on the flexible circuit board and the bonding pins on the display panel 10, which are bonded to the display panel 10 shown in fig. 1, correspond one-to-one. When the display panel 10 and the flexible circuit board are bonded and connected, once a certain bonding pin 11 on the display panel 10 and a corresponding bonding pin on the flexible circuit board are misaligned in the horizontal direction x shown in fig. 1, for example, the certain bonding pin on the display panel 10 and the corresponding bonding pin on the flexible circuit board are not overlapped, which may cause an open circuit at the bonding pin 11; as another example, overlapping of a bonding pin 11 on display panel 10 with a neighboring bonding pin 11 of a corresponding bonding pin 11 on a flexible circuit board may result in a short at the bonding pin 11.
In order to solve the above problem, the present application provides another display panel, the length direction through setting up at least part of bonding pin 11 inclines for vertical direction y, then when bonding pin 11 that certain slope on display panel 10 set up and corresponding bonding pin on the flexible circuit board take place the dislocation on the horizontal direction x shown in fig. 1, can change the overlapping area between the dislocation bonding pin through the mode that moves flexible circuit board or display panel 10 on vertical direction y, thereby reduced because of the probability that bonding width undersize leads to the unusual problem of bonding, improved bonding reliability.
The following describes a display panel provided in an embodiment of the present application in detail with reference to the drawings.
Fig. 2 is a schematic structural diagram of another display panel provided in the present application. As shown in FIG. 2, the extension lines of bonding pins 11 in respective length directions L intersect at a point Q1I.e., multiple bonding pins 11 are not conventionally arranged in parallel. Point Q1May be located on a side of bonding pin 11 close to display area AA, or may be located on a side of bonding pin 11 far from display area AA. In one example, bonding pins 11 are centrosymmetric patterns, and the center lines of bonding pins 11 intersect at a point Q1。
Fig. 3 is a schematic partial structure diagram of a display panel according to a first embodiment of the present application. As shown in FIG. 3, the display panel is different from the display panel 20 shown in FIG. 2 in that a plurality of bonding pins 11 respectively intersect at two points, namely, a point Q1And point Q2。
For example, as shown in fig. 3, the bonding pins 11 are divided into two first type pin groups, i.e., a first pin group S1And a second lead group S2And the bonding pins 11 in the two pin groups are alternately arranged. For example, in the horizontal direction x, the single bonding pins 11 constitute the first pin group S in order from left to right1Even number bonding pins 11 form a second pin group S2. When the number of bonding pins 11 is even, as shown in fig. 3, the number of bonding pins 11 in two pin groups is the same; when the number of bonding pins 11 is odd, the number of bonding pins 11 in the two pin groups differs by 1, as shown in fig. 4. First lead group S1At a left side point Q where extension lines of a plurality of bonding pins 11 in respective length directions L intersect1The second lead group S2At right side point Q, extension lines of a plurality of bonding pins 11 in respective length directions L intersect2. It will be understood by those skilled in the art that the first pin group S may also be provided1At right side point Q, extension lines of a plurality of bonding pins 11 in respective length directions L intersect2The second lead group S2At a left side point Q where extension lines of a plurality of bonding pins 11 in respective length directions L intersect1。
In this case, the length directions of the bonding pins 11 intersecting at the same point are inclined two by two, and the arrangement of the bonding pins 11 as shown in fig. 3 improves the bonding reliability for the same reason as the embodiment shown in fig. 2. At the same time, intersecting at multiple points, e.g., two points as shown in FIG. 3, more bonding pins 11 may be placed in limited fan-out area BB than one point as shown in FIG. 2. Moreover, in the present application, in the case where the extensions of adjacent bonding pins 11 in the length direction intersect at different points, more bonding pins 11 may be further arranged in the limited fan-out area BB, compared to the case where the extensions of adjacent bonding pins 11 in the length direction intersect at the same point.
In one embodiment, as shown in FIG. 3, bonding pins 11 include ends M near display area AA, and ends M of multiple bonding pins 11 are collinear. Line L connecting end M of bonding pins 112Line L connecting two points1Parallel. Thus, compared to the line L connecting two points1Line L to end M2In the vertical scheme, the former occupies a smaller drawing area, and is easier to bond the layout design of the pin 11. Also, the effect becomes more pronounced as the number of dots increases.
In one embodiment, as shown in fig. 3 and 4, the bonding pins 11 in the same first pin group have their respective length directions opposite to the connection line L of the end portions2The inclination angle of the angle is gradually increased from two sides to the middle to 90 degrees.
For example, with the first lead group S1For example, in left-to-right order, a line L connecting the length of first bonding pin 11 with respect to the end2Is sigma, the length direction of third bonding pin 11 is opposite to the line L connecting the ends2Is inclined at an angle theta, … …, the length direction of the center bonding pin 11 is opposite to the line L connecting the ends2Is at an angle of 90 deg., … …, the length direction of the penultimate bonding pin 11 being opposite to the line L connecting the ends2Is theta, the length direction of the penultimate bonding pin 11 is opposite to the line L connecting the ends2Has an inclination angle of sigma, sigma<θ<……<90°>……>θ>σ。
According to the display panel provided by the embodiment, the connecting line L of the length direction of each of the bonding pins 11 in the same first-type pin group relative to the end part is set2The inclination angle is gradually increased to 90 degrees from two sides to the middle, the regularity is strong, and the layout design is convenient.
In one embodiment, the plurality of bonding pins are divided into a plurality of second-type pin groups, extension lines of the plurality of bonding pins in the same second-type pin group in the respective length direction sequentially pass through a plurality of points, and the length directions of the bonding pins in the same second-type pin group are parallel. For example, referring to fig. 3 and 4, each adjacent two bonding pins 11 form a pin group of the second type in a left-to-right order. First bonding pin 11 on the left and second bonding pin 11 on the left are in the respective length directionsThe extension line passes through the point Q in sequence1And point Q2The extension lines of the third bonding pin 11 on the left side and the fourth bonding pin 11 on the left side in the respective length direction sequentially pass through a point Q1And point Q2. The length direction of the first bonding pin 11 on the left side and the second bonding pin 11 on the left side are parallel, and the length direction of the third bonding pin 11 on the left side and the fourth bonding pin 11 on the left side are parallel. And so on.
According to the display panel provided by the embodiment, the length directions of the bonding pins in the same second-class pin group are parallel, so that the design is simplified.
Before bonding of display panel 20 and flexible circuit board, it is usually necessary to measure the spacing between bonding pins 11 to ensure that the product is satisfactory. For conventional parallel-arranged bonding pins 11, only two adjacent bonding pins 11 need to be arbitrarily selected for measurement, as shown in fig. 1. However, for the display panel shown in fig. 2, the distance between adjacent bonding pins 11 on either side of central bonding pin 11 is different, i.e., when the distance between two adjacent bonding pins 11 meets the requirement, it does not mean that the distance between other bonding pins 11 also meets the requirement. Therefore, the spacing between each two adjacent bonding pins 11 on one side of center bonding pin 11 needs to be measured separately, greatly increasing the workload.
To address this problem, in one embodiment, as shown in FIGS. 3 and 4, adjacent bonding pins 11 in the same pin group of the second type are on a line L parallel to the ends2The spacing in the direction is equal. For example, the spacings between first bonding pin 11 on the left and second bonding pin 11 on the left, third bonding pin 11 on the left and fourth bonding pin 11 on the left, … …, second bonding pin 11 on the right and first bonding pin 11 on the right are all equal to A, and equal to point Q1And point Q2The spacing a therebetween.
Under the condition, one second-class pin group is selected randomly for measuring the distance, so that the measuring workload is greatly reduced.
FIG. 5A schematic view of a partial structure of a display panel provided in the third embodiment of the present application. As shown in FIG. 5, in the display panel, a plurality of bonding pins 11 respectively intersect at three points, namely, point Q1Point Q2And point Q3。
For example, as shown in fig. 5, the bonding pins 11 are divided into three first type pin groups, i.e., a first pin group S1A second lead group S2And a third lead group S3And bonding pins 11 in the three pin groups are alternately arranged. For example, in the horizontal direction x, the (3i +1, i ═ 0, 1, 2 … …) -th bonding pins 11 form the first pin group S in the order from left to right1(ii) a The (3i +2) th bonding pin 11 forms a second pin group S2(ii) a The (3i +3) th bonding pin 11 forms a third pin group S3. When the number of bonding pins 11 is an integer multiple of 3, as shown in fig. 5, the number of bonding pins 11 in the three pin groups is the same; when the number of bonding pins 11 is 1 times of 3, as shown in fig. 6, the first pin group S1And a second lead group S2Is equal in number to the third pin group S3One more bonding pin 11; when the number of bonding pins 11 is a multiple of 3 and 2, as shown in fig. 7, the second pin group S2And a third lead group S3Is equal in number to bonding pins 11 in the first pin group S11 bonding pin 11 less. First lead group S1At a left side point Q where extension lines of a plurality of bonding pins 11 in respective length directions intersect1The second lead group S2At a middle point Q where extension lines of a plurality of bonding pins 11 in respective length directions intersect2The third lead group S3At right side point Q, extension lines of a plurality of bonding pins 11 in respective length directions intersect3。
In one embodiment, as shown in FIGS. 5, 6, and 7, bonding pins 11 include ends M near display area AA, and ends M of multiple bonding pins 11 are collinear. Line L connecting end M of bonding pins 112Line L connecting three points1Parallel.
In one embodiment, as shown in FIG. 5,As shown in fig. 6 and 7, the length directions of the bonding pins 11 in the same first pin group are opposite to the connection line L of the end parts2The inclination angle of the angle is gradually increased from two sides to the middle to 90 degrees.
In one embodiment, as shown in fig. 5, 6 and 7, the bonding pins 11 are divided into a plurality of second type pin groups, extension lines of the bonding pins 11 in the same second type pin group in the length direction sequentially pass through a plurality of points, and the length directions of the bonding pins 11 in the same second type pin group are parallel.
In one embodiment, as shown in fig. 5, 6 and 7, adjacent bonding pins 11 in the same pin group of the second type are on a line L parallel to the end portion2The spacing in the direction is equal.
Fig. 8 is a schematic partial structure diagram of a display panel according to a sixth embodiment of the present application. As shown in FIG. 8, in the display panel, a plurality of bonding pins 11 intersect at n points, i.e., point Q, respectivelynAnd n is a positive integer.
For example, as shown in fig. 8, the plurality of bonding pins 11 are divided into n first type pin groups Sn, and the bonding pins 11 in the n first type pin groups are alternately arranged. First lead group S1The extension line of bonding pin 11 in the length direction intersects at point Q1The second lead group S2The extension line of bonding pin 11 in the length direction intersects at point Q2… …, nth lead group S3The extension line of bonding pin 11 in the length direction intersects at right side point Qn。
In one embodiment, as shown in FIG. 8, bonding pins 11 include ends M near display area AA, and ends M of multiple bonding pins 11 are collinear. Line L connecting end M of bonding pins 112Line L connecting n points1Parallel.
In one embodiment, as shown in fig. 8, the length direction of the bonding pins 11 in the same first pin group is opposite to the connection line L of the end portion2The inclination angle of the angle is gradually increased from two sides to the middle to 90 degrees.
In one embodiment, as shown in fig. 8, the bonding pins are divided into n second type pin groups, extension lines of the bonding pins in the same second type pin group in the length direction sequentially pass through a plurality of points, and the length directions of the bonding pins in the same second type pin group are parallel.
In one embodiment, as shown in fig. 8, adjacent bonding pins in the same second-type pin group are equally spaced in a direction parallel to the line of the end portion.
For the display panel provided in any of the above embodiments, bonding pin 11 is on a line L perpendicular to end M2The orthographic projection of (a) is equal. In this case, once bonding pin 11 is curled at an end portion away from display area AA, as shown in fig. 9, the curled bonding pin 11 easily overlaps an adjacent bonding pin 11, causing a short circuit.
In view of the above, the present application also provides another display panel. Fig. 10 is a schematic partial structure diagram of a display panel according to a seventh embodiment of the present application. As shown in FIG. 10, in the display panel, a line L is formed at a position perpendicular to the end M2In the direction (2), the lengths of the orthographic projections of bonding pins 11 are not uniform, that is, the lengths of the orthographic projections of bonding pins 11 are not all equal.
In one embodiment, plurality of bonding pins 11 are on a line L perpendicular to end M2The length of the orthographic projection in the direction of (a) varies periodically with the number of points. For example, the lengths of the orthographic projections of a plurality of bonding pins 11 in the same pin group are equal, and the lengths of the orthographic projections of the bonding pins 11 in different pin groups are different. Like this, arbitrary two adjacent bonding pin 11's length is inequality, even if certain bonding pin 11 has taken place the turn-up, as shown in fig. 11, this bonding pin that takes place the turn-up can not overlap joint on adjacent bonding pin yet to bonding pin's reliability has been improved.
It should be understood that the present embodiment only takes two pin groups as an example, and the number of the pin groups is not limited.
Fig. 12 is a schematic partial structure diagram of a display panel according to an eighth embodiment of the present application. As shown in fig. 12, in the display panel, a line L is formed parallel to the end portion M2In the direction of (1), bonding the width of pin 11Non-uniformity, i.e. multiple bonding pins 11 in a line L parallel to end M2Are not all equal.
In one embodiment, plurality of bonding pins 11 are on a line L parallel to end M2The width in the direction of (a) varies periodically with the number of dots. For example, a plurality of bonding pins 11 in the same pin group are connected to a line L parallel to the end M2Have equal width in the direction of (1), and bonding pins 11 in different pin groups are on a line L parallel to end M2Have different widths in the direction of (a). In other embodiments, bonding pins 11 in the same pin group may be arranged on a line L parallel to end M2Have different widths in the direction of (a). The variation of the width of the plurality of bonding pins 11 may be set reasonably according to actual needs.
It should be understood that the present embodiment only takes two pin groups as an example, and the number of the pin groups is not limited.
According to the display panel provided by the present embodiment, the connection line L is provided in parallel with the end portion M2In the direction of, nation decides pin 11's width is uneven, can rationally set up each nation decides pin 11's width according to the demand of difference, avoids all nation to decide pin 11 to adopt the homogeneous width, leads to the extravagant problem in space.
It should be understood that the terms "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used for clearly explaining the technical solutions, and are not used for limiting the protection scope of the present application.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (10)
1. A display panel, comprising: the fan-out area is arranged on one side of the display area, a plurality of bonding pins are arranged on the fan-out area, the bonding pins comprise end portions close to the display area, and the end portions of the bonding pins are collinear; extension lines of the bonding pins in the length directions of the bonding pins are intersected at a plurality of points respectively, and connecting lines of the points are parallel to connecting lines of the end parts.
2. The display panel of claim 1, wherein the length of the orthographic projection of the plurality of bonding pins is non-uniform in a direction perpendicular to the line connecting the end portions.
3. The display panel of claim 1, wherein the plurality of bonding pins have non-uniform widths in a direction parallel to the lines of the end portions.
4. The display panel according to any one of claims 1 to 3, wherein the bonding pins are divided into a plurality of first type pin groups, the bonding pins in different first type pin groups are arranged alternately, and extension lines of the bonding pins in the same first type pin group in the length direction intersect at the same point.
5. The display panel according to claim 4, wherein the inclination angle of the length direction of the bonding pins in the same first type pin group with respect to the end portion connecting line is gradually increased from two sides to the middle to 90 °.
6. The display panel according to any one of claims 1-3, wherein the bonding pins are divided into a plurality of second type pin groups, extension lines of the bonding pins in the second type pin group in the length direction sequentially pass through the plurality of points, and the length directions of the bonding pins in the second type pin group are parallel.
7. The display panel according to claim 6, wherein adjacent bonding pins in the same group of pins of the second type are equally spaced in a direction parallel to the line connecting the end portions.
8. The display panel of claim 1, wherein the length of the orthographic projection of the plurality of bonding pins in the direction perpendicular to the line connecting the ends varies periodically by the number of points; and/or
The width of the bonding pins in a direction parallel to a line connecting the ends varies periodically by the number of points.
9. The display panel of claim 1, wherein the bonding pins are centrosymmetric, and the center lines of the bonding pins respectively intersect at a plurality of points.
10. A flexible circuit board is characterized by comprising a bonding area, wherein the bonding area is provided with a plurality of bonding pins, the bonding pins comprise end parts close to the edge of the flexible circuit board, and the end parts of the bonding pins are collinear; extension lines of the bonding pins in the length directions of the bonding pins are intersected at a plurality of points respectively, and connecting lines of the points are parallel to connecting lines of the end parts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111672346.2A CN114333560A (en) | 2021-12-31 | 2021-12-31 | Display panel and circuit board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111672346.2A CN114333560A (en) | 2021-12-31 | 2021-12-31 | Display panel and circuit board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000990A1 (en) * | 2022-06-29 | 2024-01-04 | 合肥维信诺科技有限公司 | Bonding structure, display panel, flexible circuit board, and display apparatus |
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| CN113724618A (en) * | 2021-08-27 | 2021-11-30 | 京东方科技集团股份有限公司 | Display device, binding method thereof and display equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000990A1 (en) * | 2022-06-29 | 2024-01-04 | 合肥维信诺科技有限公司 | Bonding structure, display panel, flexible circuit board, and display apparatus |
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