CN111028673B

CN111028673B - Display panel and display device

Info

Publication number: CN111028673B
Application number: CN201911239932.0A
Authority: CN
Inventors: 陈辉鹏
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2022-05-31
Anticipated expiration: 2039-12-06
Also published as: CN111028673A

Abstract

The application provides a display panel and a display device, wherein the display panel comprises a binding region, and the binding region is used for binding and connecting with a driving device; the binding area comprises a first sub-binding area and a second sub-binding area, wherein a plurality of first binding pieces are arranged on the first sub-binding area, each first binding piece comprises a first binding main body and a first binding part, a plurality of second binding pieces are arranged on the second sub-binding area, and each second binding piece comprises a second binding main body and a second binding part; the second binding portion is adjacent to the first binding portion, the width of the first binding portion decreases progressively from a side close to the first binding body to a side far away from the first binding body, and the width of the second binding portion decreases progressively from a side close to the second binding body to a side far away from the second binding body. The display panel reduces the risk of short circuit caused by aggregation of the conductive particles, and improves the display effect of the display panel.

Description

Display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel and a display device.

Background

With the continuous development of flexible display technology, people have a higher pursuit for the display effect of the display panel, and the flexible display technology with high resolution and high resolution gradually forms a mainstream.

In the binding design of the display panel and the peripheral circuit, in order to achieve high resolution and high resolution, the number of lines in the binding region of the display panel generally needs to be increased, however, under the condition that the total size of the binding region is not changed, the increase of the number of lines in the binding region causes the increase of the number of binding pads (pads), and conductive particle aggregation occurs between the binding pads, which causes a short circuit of the lines, thereby causing abnormal display of the display panel.

Disclosure of Invention

The application provides a display panel and a display device, which are used for reducing the risk of short circuit caused by aggregation of conductive particles.

The application provides a display panel, which comprises a binding region, a first electrode and a second electrode, wherein the binding region is used for being bound and connected with a driving device;

the binding region comprises a first sub-binding region and a second sub-binding region, and the first sub-binding region and the second sub-binding region are arranged oppositely;

a plurality of first binding pieces are arranged on the first sub-binding area, each first binding piece comprises a first binding main body and a first binding part, and the first binding part is arranged on one side, close to the second sub-binding area, of the first binding main body;

a plurality of second binding pieces are arranged on the second sub-binding area, each second binding piece comprises a second binding main body and a second binding part, and the second binding parts are arranged on one sides, close to the first sub-binding areas, of the second binding main bodies;

the second binding part is arranged adjacent to the first binding part, the width of the first binding part decreases progressively from one side close to the first binding body to one side far away from the first binding body, and the width of the second binding part decreases progressively from one side close to the second binding body to one side far away from the second binding body.

In the display panel of the present application, the plurality of first binding pieces are arranged in a first row, and the plurality of second binding pieces are arranged in a second row;

the first binding members in the first row are staggered from the second binding members in the second row.

In the display panel of the present application, a pattern of an orthogonal projection of the first binding part on a plane where the first binding part is located is a first pattern;

the first pattern comprises a first edge, a second edge and a third edge which are connected end to end, and the third edge is overlapped with the boundary line of the first binding body;

the intersection of the first edge and the second edge is located on a perpendicular bisector of the first pattern.

In the display panel of the present application, the first edge is a straight edge or an arc edge, and the second edge is a straight edge or an arc edge.

In the display panel of the present application, the first binding member further includes a third binding portion, a width of the third binding portion decreases from a side close to the first binding body to a side away from the first binding body;

the second binding member further includes a fourth binding portion having a width decreasing from a side close to the second binding body to a side far from the second binding body.

In the display panel of the present application, a pattern of an orthogonal projection of the third binding portion on a plane where the first binding member is located is a second pattern;

the second pattern comprises a fourth edge, a fifth edge, a sixth edge and a seventh edge which are connected end to end, the fifth edge and the seventh edge are arranged in parallel, and the fifth edge is overlapped with the boundary line of the first binding main body;

the fourth side and the sixth side are symmetrically disposed about a perpendicular bisector of the second pattern.

In the display panel of the present application, the fourth edge is a straight edge or an arc edge, and the sixth edge is a straight edge or an arc edge.

In the display panel of the application, the display panel further comprises a conductive adhesive, the driving device comprises a plurality of connecting terminals, and the conductive adhesive is arranged between the connecting terminals and the first binding pieces;

be provided with the recess on the first binding, connecting terminal includes the convex part, the convex part with the recess phase-match.

In the display panel of the present application, the groove is one or more.

The application also provides a display device, which comprises the display panel.

The application provides a display panel and display device, in binding the district in the adjacent son of district, the width of first binding portion is from being close to the first side of binding the main part and progressively decrease to the one side of keeping away from the first main part of binding, and the width of second binding portion is from being close to the second and binding the one side of main part and progressively decrease to the one side of keeping away from the second and binding the main part of main part. Through the space between the adjacent binding portion of increase, can effectively avoid the gathering of conducting particle between the binding portion, reduce the short circuit risk because of conducting particle mutual contact arouses, and then improved display panel's display effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic plan view of a display panel according to a first embodiment of the present application;

FIG. 2 is a schematic plan view of a display panel bonding area according to the first embodiment of the present application;

fig. 3 is a first configuration diagram of a first pattern of a first binding portion of a display panel according to a first embodiment of the present application;

fig. 4 is a second schematic structural diagram of a first pattern of a first binding portion of a display panel according to a first embodiment of the present application;

fig. 5 is a third structural view of a first pattern of a first binding portion of a display panel according to the first embodiment of the present application;

FIG. 6 is a schematic cross-sectional view taken at a-a' of FIG. 1;

FIG. 7 is a schematic cross-sectional view at b-b' of FIG. 2;

FIG. 8 is a schematic plan view of a display panel bonding area according to a second embodiment of the present application;

fig. 9 is a schematic structural view of a second pattern of a third binding portion of a display panel according to a second embodiment of the present application;

fig. 10 is a schematic plan view of a display panel bonding area according to a third 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.

It is to be noted, however, that the following description of various embodiments is made with reference to the appended drawings, which are included to illustrate specific embodiments in which the application may be practiced. Furthermore, directional terms used in the present application, such as upper, lower, vertical, parallel, symmetrical, etc., refer only to the direction of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting.

Referring to fig. 1, fig. 2 and fig. 6, fig. 1 is a schematic plan view illustrating a display panel according to a first embodiment of the present application; fig. 2 is a schematic plan view illustrating a bonding area of a display panel according to a first embodiment of the present application; fig. 6 is a schematic cross-sectional view taken at a-a' in fig. 1.

The display panel 100 of the first embodiment of the present application includes a display area 10 and a non-display area 11. The non-display area 11 includes a binding area 12. The bonding region 12 is used for bonding connection with the driving device 15. Optionally, the driving device 15 is a driving chip, a flexible circuit board or other peripheral circuits. The connection terminals 151 of the driving device 15 are electrically connected to the first and second binding

members

13 and 14 through the conductive paste 16. In the first embodiment of the present application, the driving device 15 is taken as an example of a driving chip, but the present application is not limited thereto.

Specifically, the binding region 12 includes a first sub-binding region 121 and a second sub-binding region 122. The first sub-bundled region 121 is disposed opposite to the second sub-bundled region 122. The first sub-binding region 121 is provided with a plurality of first bindings 13. The first binding 13 includes a first binding body 131 and a first binding part 132. The first binding part 132 is disposed at a side of the first binding body 131 close to the second sub-binding region 122. A plurality of second bindings 14 are provided on the second sub-binding region 122. The second binding 14 includes a second binding body 141 and a second binding part 142. The second binding part 142 is disposed at a side of the second binding body 141 close to the first sub-binding region 121. The second binding portion 142 is disposed adjacent to the first binding portion 132. The width of the first binding part 132 decreases from a side close to the first binding body 131 to a side far from the first binding body 131. The width of the second binding part 142 decreases from a side close to the second binding body 141 to a side far from the second binding body 141.

Therefore, the display panel 100 according to the first embodiment of the present application reduces the volume of the first binding portion 132 and the second binding portion 142, and further increases the space between the first binding portion 132 and the second binding portion 142, so that when the driving device 15 is bound with the first binding member 13 and the second binding member 14 at the same time, the conductive particles in the conductive paste 16 are dispersed in the space between the first binding portion 132 and the second binding portion 142, and the risk of short circuit caused by the aggregation of the conductive particles in the binding region 12 is reduced.

Optionally, the binding region 12 may further include a third sub-binding region and a fourth sub-binding region (not shown in the figure), and the specific number of the sub-binding regions may be set according to an actual situation, which is not limited in this application.

In the first embodiment of the present application, a plurality of first binding members 13 are arranged in a first row. A plurality of second binding 14 are arranged in a second row. The first binding 13 in the first row is staggered with the second binding 14 in the second row. The above arrangement allows the distance between the first and second

binding members

13 and 14 to be increased, and thus the space between the first and second

binding portions

132 and 142 to be further increased, thereby further reducing the risk of short circuits caused by the aggregation of conductive particles within the binding region 12.

Alternatively, the extension of the central axis of a first binding 13 may be located in the middle of an adjacent second binding 14. Accordingly, the distances from the first binding member 13 to the adjacent second binding members 14 are the same, and the conductive particles are uniformly dispersed in the gaps between the first binding member 13 and the adjacent second binding members 14, and are not easily aggregated. In addition, the degree of staggering between the first binding 13 and the second binding 14 can be set according to specific situations, and the present application does not limit the degree of staggering.

Please refer to fig. 3 to 5. In the first embodiment of the present application, the orthographic projection pattern of the first binding portion 132 on the plane of the first binding member 13 is a first pattern. The first pattern includes a first side a1, a second side a2, and a third side a3 connected end to end. The third side a3 coincides with the boundary line of the first binding body 131. Alternatively, the intersection of the first side a1 and the second side a2 is located on the perpendicular bisector OO' of the first pattern. Such setting makes first pattern be class isosceles triangle shape, and the conductive particle on first binding portion 132 distributes more evenly from this, can improve the stability of being connected electrically between first binding portion 132 and drive device 15, and then strengthens display panel's display effect.

Alternatively, when the extension line of the central axis of the first binding 13 is positioned at the middle of the adjacent second binding 14 and the first pattern of the first binding portions 132 has a shape like an isosceles triangle, the distance from the first edge a1 of the first binding portion 132 to its adjacent second binding portion 142 is equal to the distance from the second edge a2 to its adjacent second binding portion 142. That is, the distance from each first binding portion 132 to each second binding portion 133 is equal. Since the distances between the first and second

binding portions

132 and 142 are equal, the conductive particles distributed in the space between the first and second

binding portions

132 and 142 tend to be uniform, and thus the aggregation of the conductive particles is prevented.

In addition, in some embodiments, the intersection point of the first edge a1 and the second edge a2 may also be located on one side of the perpendicular line OO' in the first pattern, and will not be described herein again.

Specifically, the first side a1 is a straight side or an arc side. The second side a2 is a straight or curved side.

In the first embodiment of the present application, the first side a1 and the second side a2 may be straight sides at the same time, i.e. the first pattern is an isosceles triangle, as shown in fig. 3. The distribution of conducting particle on first binding portion 132 at this moment has better equilibrium, and difficult emergence skew has avoided the conducting particle to take place the short circuit because of the gathering.

Alternatively, the first pattern may also be a non-isosceles triangle, and this embodiment should not be construed as limiting the present application. For example, the first side a1 and the second side a2 may be arc sides at the same time. Specifically, the arc edge may be a convex arc edge or a concave arc edge.

Referring to fig. 4, fig. 4 is a second structural schematic diagram of a first pattern of a first binding portion of a display panel according to a first embodiment of the present application, and different from fig. 3, a first side a1 and a second side a2 are both convex arcs. At this time, the bearing area of the first binding portion 132 is large, so that the first binding portion 132 can capture more conductive particles, and the stability of the electrical connection between the first binding portion 132 and the driving device 15 is improved.

Referring to fig. 5, fig. 5 is a third structural schematic view of a first pattern of a first binding portion of a display panel according to a first embodiment of the present application, and different from fig. 4, a first side a1 and a second side a2 are concave arc sides at the same time. At this time, the volume of the first binding portion 132 is further reduced, thereby further increasing the space between the first binding portion 132 and the second binding portion 142, and when the conductive particles are pressed to be converged toward the gap between the binding portions, there is enough space between the adjacent binding portions to accommodate the conductive particles, effectively preventing the aggregation of the conductive particles.

In addition, the first side a1 and the second side a2 can also be a combination of straight sides and arc sides. The specific shape of the first pattern can be selected according to practical situations, and the application does not limit the shape.

In addition, in the first embodiment of the present application, the orthogonal projection pattern of the second binding portion 142 on the plane of the second binding 14 may be the same as the first pattern. Of course, in some embodiments, the orthographic projection of the second binding portion 142 onto the plane of the second binding 14 may be different from the first pattern, and the first pattern is not to be construed as limiting the present application.

Referring to fig. 6, fig. 6 is a schematic cross-sectional view taken along line a-a' of fig. 1. The display panel 100 further comprises a substrate 19. A plurality of first and second

binding members

13 and 14 are provided on the base plate 19. There is a clearance between the first binding 13 and between the second binding 14. The first embodiment of the present application will be described by taking the binding of the first binding member 13 and the driving device 15 as an example, but is not limited thereto.

In the first embodiment of the present application, the display panel 100 further includes a conductive paste 16. Optionally, the conductive paste 16 is an anisotropic conductive paste. The conductive glue 16 is used to connect the drive means 15 with the first binding 13. The driving device 15 includes a plurality of connection terminals 151. The connection terminal 151 is located on the side of the drive device 15 close to the first binding 13. The connection terminals 151 correspond one-to-one to the first binding 13. The connection terminal 151 and the first binding member 13 are electrically connected by conductive particles in the conductive paste 16.

In particular, the first binding member 13 is provided with a groove 17. The connection terminal 151 includes the convex portion 18. The protrusion 18 matches the groove 17. Specifically, the projections 18 correspond one-to-one to the recesses 17. Optionally, there are one or more grooves 17. When the plurality of grooves 17 are provided, the plurality of grooves 17 may be arranged continuously or at intervals, and the plurality of protrusions 18 are correspondingly provided, so that the protrusions 18 and the grooves 17 correspond to each other one by one.

The groove arrangement of the first binding member 13 may capture more conductive particles, thereby improving the stability of the electrical connection between the first binding member 13 and the driving device 15. Meanwhile, the arrangement of the grooves 17 improves the capture rate of the conductive particles, so that the probability that the conductive particles fall into the space between the first binding pieces 13 is reduced, and the aggregation of the conductive particles is avoided.

Referring to fig. 7, fig. 7 is a schematic cross-sectional view taken along line b-b' of fig. 2. In the first binding portion 132, the area of the first binding portion 132 increases from the surface closer to the substrate 19 to the surface farther from the substrate 19. This can improve the degree of dispersion of the conductive particles that fall into the gap between the adjacent first binding portions 132, and further reduce the occurrence of the conductive particle aggregation phenomenon. In addition, in some embodiments, the first binding portion 132 may also be provided with a groove 17, which is not described herein.

In the second binding portion 142, the area of the second binding portion 142 may be increased from the surface closer to the substrate 19 to the surface farther from the substrate 19. The third and fourth

binding portions

133 and 143 may have the same configuration, and this embodiment is not to be construed as limiting the present application.

Referring to fig. 8, fig. 8 is a schematic plan view illustrating a bonding area of a display panel according to a second embodiment of the present application. The display panel of the second embodiment of the present application is different from the first embodiment in that: the first binding member 13 further includes a third binding portion 133; the second binding member 14 further includes a fourth binding portion 143.

Specifically, the third binding part 133 is disposed at a side of the first binding body 131 away from the second sub-binding region 122. The width of the third binding part 133 is decreased from a side close to the first binding body 131 to a side far from the first binding body 131. The fourth binding part 143 is disposed at a side of the second binding body 141 away from the first sub-binding region 121. The width of the fourth binding part 143 decreases from a side close to the second binding body 141 to a side far from the second binding body 141.

When the binding region 12 includes only two sub-binding regions, the third binding portion 133 and the fourth binding portion 143 may increase the space at the edge of the binding region 12, improve the dispersion degree of the conductive particles at the edge of the binding region 12, and further reduce the aggregation probability of the conductive particles.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a second pattern of a third binding portion of a display panel according to a second embodiment of the present application.

In the second embodiment of the present application, the orthogonal projection pattern of the third binding portion 133 on the plane of the first binding member 13 is a second pattern. The second pattern includes a fourth side b1, a fifth side b2, a sixth side b3, and a seventh side b4 connected end to end. The fifth side b2 is disposed parallel to the seventh side b 4. The fifth side b2 coincides with the boundary line of the first binding body 131. Alternatively, the fourth side b1 and the sixth side b3 are symmetrically disposed about the perpendicular bisector of the second pattern. Such an arrangement can appropriately increase the bearing area of the third binding portion 133, improve the capturing rate of the conductive particles, and thus ensure the stability of the electrical connection between the third binding portion 133 and the driving device 15. Meanwhile, the space at the edge of the binding region 12 can be increased, and the aggregation of conductive particles is avoided.

In addition, in some embodiments, the fourth side b1 and the sixth side b3 may also be disposed asymmetrically with respect to the perpendicular bisector of the second pattern, which is not described herein again.

Specifically, the fourth side b1 is a straight side or an arc side. The sixth side b3 is a straight or curved side.

In the second embodiment of the present application, the fourth side b1 and the sixth side b3 may be straight sides at the same time, i.e. the second pattern is an isosceles trapezoid, as shown in fig. 9. At this time, the distribution of the conductive particles on the third binding portion 133 is well balanced, thereby preventing the conductive particles from being short-circuited due to aggregation.

Alternatively, the second pattern may also be a non-isosceles trapezoid, and this embodiment is not to be construed as limiting the application. For example, in some embodiments, the fourth side b1 and the sixth side b3 may be arc sides at the same time, or may be a combination of straight sides and arc sides, which is not described herein.

The second pattern may be the same as or different from the pattern of the orthographic projection of the fourth binding portion 143 on the plane of the second binding member 14, and the second pattern is not to be construed as limiting the present application.

Referring to fig. 10, fig. 10 is a schematic plan view illustrating a bonding region of a display panel according to a third embodiment of the present application. The display panel of the third embodiment of the present application is different from the second embodiment in that: the second pattern is the same as the first pattern.

Specifically, when the second pattern is the same as the first pattern, such as an isosceles triangle, the space at the edge of the binding region 12 can be further increased, and the degree of dispersion of the conductive particles at the edge of the binding region 12 can be improved, thereby avoiding aggregation of the conductive particles in the region. In addition, the specific shape of the second pattern can also be selected according to the actual situation, which is not limited in the present application.

The present application further provides a display device, which includes a display panel 100, where the display panel 100 is the display panel in any of the embodiments described above in the present application. The structure of the display panel 100 is as described above, and is not described herein again.

The display device provided by the present application may be any product or component having a display function, such as a mobile phone, a tablet computer, or a notebook computer.

The embodiment of the application provides a display panel 100 and a display device, through set up first binding portion 132 and second binding portion 142 in the adjacent sub-binding area in binding district 12, wherein, the width of first binding portion 132 is from being close to the first side of binding main part 131 to keeping away from the first side of binding main part 131 and is decrement, the width of second binding portion 142 is from being close to the second side of binding main part 141 to keeping away from the second side of binding main part 141 and decrement, make the space increase between the adjacent binding portion, can effectively avoid the gathering of conductive particles between the binding portion, reduce the short circuit risk that arouses because of conductive particle mutual contact, and then display panel's display effect has been improved.

The foregoing provides a detailed description of embodiments of the present application, and the principles and embodiments of the present application have been described herein using specific examples, which are presented solely to aid in the understanding of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A display panel comprises a binding region, a first electrode and a second electrode, wherein the binding region is used for being in binding connection with a driving device; it is characterized in that the preparation method is characterized in that,

wherein the second binding part is disposed adjacent to the first binding part, a width of the first binding part decreases from a side close to the first binding body to a side far from the first binding body, a width of the second binding part decreases from a side close to the second binding body to a side far from the second binding body,

wherein the display panel further comprises a substrate, the first binding portion and the second binding portion are disposed on the substrate, and the area of one surface of the first binding portion and the area of the second binding portion, which is close to the substrate, are increased toward the area of one surface, which is far from the substrate.

2. The display panel of claim 1, wherein the first plurality of bindings are arranged in a first row and the second plurality of bindings are arranged in a second row;

3. The display panel according to claim 1, wherein a pattern of an orthographic projection of the first binding portion on a plane on which the first binding member is located is a first pattern;

4. The display panel according to claim 3, wherein the first edge is a straight edge or an arc edge, and the second edge is a straight edge or an arc edge.

5. The display panel according to claim 1, wherein the first binding member further comprises a third binding portion, and a width of the third binding portion decreases from a side close to the first binding body to a side far from the first binding body;

6. The display panel of claim 5, wherein the orthographic projection pattern of the third binding on the plane of the first binding is a second pattern;

the second pattern comprises a fourth edge, a fifth edge, a sixth edge and a seventh edge which are connected end to end, the fifth edge and the seventh edge are arranged in parallel, and the fifth edge is superposed with the boundary line of the first binding main body;

7. The display panel according to claim 6, wherein the fourth edge is a straight edge or an arc edge, and the sixth edge is a straight edge or an arc edge.

8. The display panel according to claim 1, wherein the display panel further comprises a conductive paste, the driving device comprises a plurality of connection terminals, and the conductive paste is disposed between the connection terminals and the first bonding members;

9. The display panel according to claim 8, wherein the groove is one or more.

10. A display device characterized in that it comprises a display panel according to any one of claims 1 to 9.