CN114093262B - Display panel and display device - Google Patents
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- CN114093262B CN114093262B CN202111370285.4A CN202111370285A CN114093262B CN 114093262 B CN114093262 B CN 114093262B CN 202111370285 A CN202111370285 A CN 202111370285A CN 114093262 B CN114093262 B CN 114093262B
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- 239000000758 substrate Substances 0.000 claims description 35
- 238000012360 testing method Methods 0.000 description 13
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- 238000001514 detection method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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Abstract
The embodiment of the application provides a display panel and a display device, wherein the display panel comprises a display area and a non-display area, the non-display area is provided with a plurality of first bonding pads, the first bonding pads extend along a first direction, and the first bonding pads comprise: the length of the extending part along the first direction is larger than the length of the lap joint part along the first direction, the width of the extending part along the second direction is smaller than the maximum width of the lap joint part along the second direction, and the first direction is perpendicular to the second direction. The embodiment of the application can improve or even eliminate the short circuit problem between the adjacent first bonding pads and improve the yield of the display panel.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a display panel and a display device.
Background
Along with the development of science and technology and economy, the display panel is widely applied to the production and life of people. Such as a plasma display panel, a liquid crystal display panel, an organic light emitting diode display panel, a Micro LED display panel, and a Mini LED display panel, are widely used.
Generally, a display panel includes a display area for displaying an image and a non-display area located on at least one side of the display area. The non-display area can be provided with a bonding pad, the bonding pad can be used for binding a driving integrated circuit, and can also be used for connecting a detection circuit or detection equipment so as to finish testing work of an array substrate test, a dot screen test and the like of the display panel.
However, the inventors of the present application found that short circuits are likely to occur between pads of a display panel, which in turn may cause a problem of poor display of the display panel.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, which can improve or even eliminate the problem of short circuit between bonding pads of the display panel and improve the yield of the display panel.
In a first aspect, an embodiment of the present application provides a display panel, the display panel including a display area and a non-display area, the non-display area being provided with a plurality of first pads, the first pads extending along a first direction, the first pads including: the length of the extending part along the first direction is larger than the length of the lap joint part along the first direction, the width of the extending part along the second direction is smaller than the maximum width of the lap joint part along the second direction, and the first direction is perpendicular to the second direction.
According to an embodiment of the first aspect of the application, the first bonding pad comprises a lap joint; in the adjacent two first bonding pads, the lap joint part in the first bonding pad is positioned on one side of the extension part in the first bonding pad, which is close to the display area, and the lap joint part in the second first bonding pad is positioned on one side of the extension part in the second first bonding pad, which is far away from the display area.
Therefore, since the lap joint part in the first bonding pad of the adjacent first bonding pads is positioned on one side, close to the display area, of the extension part in the first bonding pad, and the lap joint part in the second first bonding pad is positioned on one side, far away from the display area, of the extension part in the second first bonding pad, namely the lap joint parts of the adjacent first bonding pads are staggered, the space of the display panel can be more fully utilized, a larger number of first bonding pads are distributed in the limited space of the display panel, the distance between the lap joint parts of the adjacent first bonding pads can be increased, and the short circuit caused by the adhesion of foreign matters between the lap joint parts of the adjacent first bonding pads is prevented.
According to any of the foregoing embodiments of the first aspect of the present application, the first pad includes two lap portions, and the two lap portions are electrically connected by the extension portion.
In this way, since the first bonding pad includes two overlapping portions, the overlapping area between the first bonding pad and other overlapping objects can be increased when the first bonding pad overlaps with other overlapping objects (such as bonding pads), and the connection strength between the first bonding pad and other overlapping objects can be improved.
According to any of the foregoing embodiments of the first aspect of the present application, the shape of the orthographic projection of the lap portion on the substrate of the display panel includes a circle, an ellipse, or a polygon.
According to any of the foregoing embodiments of the first aspect of the present application, the shape of the orthographic projection of the lap portion on the substrate of the display panel includes a triangle.
In this way, since the orthographic projection of the lap joint part on the substrate of the display panel is in a stable triangle shape, the lap joint part has good stability and is not easy to deform.
According to any one of the foregoing embodiments of the first aspect of the present application, any two adjacent first pads, and the overlapping portion of the first pad and the overlapping portion of the second first pad are not parallel in the front projection of the substrate of the display panel.
Therefore, as the adjacent first edges and the second edges in the lap joint parts of the adjacent two first bonding pads are not parallel, only one point on the first edge is nearest to the second edge, and other points on the first edge are far away from the second edge, thereby reducing the probability of foreign matters being adhered between the lap joint parts of the adjacent first bonding pads, improving and even eliminating short circuits caused by the adhesion of the foreign matters between the lap joint parts of the adjacent first bonding pads, and improving the yield of the display panel.
According to any one of the foregoing embodiments of the first aspect of the present application, the shape of the orthographic projection of the extension portion on the substrate of the display panel is in a bent shape, and orthographic projections of the extension portions in two adjacent first pads on the substrate of the display panel are parallel to each other.
In this way, since the shape of the orthographic projection of the extension portion on the substrate of the display panel is in a bent shape and the extension portions in the two adjacent first bonding pads are parallel to each other, the area of the extension portion (i.e., the first bonding pad) can be increased while a larger distance is ensured between the extension portions in the two adjacent first bonding pads. Thus, the bonding area between the first bonding pad and other bonding objects can be increased when the first bonding pad is bonded with other bonding objects (such as bonding pads), and the connection strength between the first bonding pad and other bonding objects can be further improved.
According to any of the foregoing embodiments of the first aspect of the present application, the shape of the orthographic projection of the extension portion on the substrate of the display panel includes a zigzag shape or a wavy shape, and orthographic projections of the extension portions in two adjacent first pads on the substrate of the display panel are parallel to each other.
In this way, since the orthographic projection of the extension portion on the substrate of the display panel has a zigzag or wave shape and the extension portions in the adjacent two first pads are parallel to each other, the area of the extension portion (i.e., the first pad) can be increased while ensuring a larger pitch between the extension portions in the adjacent two first pads. Thus, the bonding area between the first bonding pad and other bonding objects can be increased when the first bonding pad is bonded with other bonding objects (such as bonding pads), and the connection strength between the first bonding pad and other bonding objects can be further improved.
According to any of the foregoing embodiments of the first aspect of the present application, the pitch of the extension portions in the second direction in the adjacent two first pads is greater than 100 micrometers.
In this way, by reducing the width of the partial area (i.e., the extension portion) in the first bonding pad, the distance between the extension portions in the two adjacent first bonding pads is increased, for example, the distance between the extension portions in the two adjacent first bonding pads is more than 100 micrometers, so that the short circuit caused by the adhesion of the foreign matters between the extension portions of the two adjacent first bonding pads is improved, and the yield of the display panel is improved.
According to any one of the foregoing embodiments of the first aspect of the present application, the display panel includes a data line, a switching signal control line, and a transistor; the gate of the transistor is electrically connected to the switching signal control line, the first pole of the transistor is electrically connected to the data line, and the second pole of the transistor is electrically connected to the first pad.
In a second aspect, an embodiment of the present application provides a display device, where the display device includes a display panel provided in any one of the embodiments of the first aspect.
The display panel and the display device in the embodiment of the application comprise a display area and a non-display area, wherein the non-display area is provided with a plurality of first bonding pads, the first bonding pads extend along a first direction, and the first bonding pads comprise: the length of the extending part along the first direction is larger than the length of the lap joint part along the first direction, the width of the extending part along the second direction is smaller than the maximum width of the lap joint part along the second direction, and the first direction is perpendicular to the second direction. According to the embodiment of the application, the width of the partial area (namely the extension part) in the first bonding pads is reduced, so that the distance between the extension parts in the two adjacent first bonding pads is increased, the short circuit caused by the adhesion of foreign matters between the adjacent first bonding pads is further improved or even eliminated, and the yield of the display panel is improved.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are needed to be used in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.
FIG. 1 is a schematic diagram of a display panel in the related art;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the application only and not limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, it is intended that the present application covers the modifications and variations of this application provided they come within the scope of the appended claims (the claims) and their equivalents. The embodiments provided by the embodiments of the present application may be combined with each other without contradiction.
Before describing the technical solution provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application firstly specifically describes the problems existing in the prior art:
as described above, the present inventors have found that the related art has a problem that a short circuit is easily generated between pads of a display panel, and thus the display panel is poorly displayed.
In order to solve the above technical problems, the inventors of the present application first studied and analyzed the root cause of the above technical problems, and the specific research and analysis procedures are as follows:
as shown in fig. 1, the display panel 10' may include a display area AA displaying an image and a non-display area NA located at least one side of the display area AA. The non-display area NA may be provided with different types of pads 101'. The inventors of the present application have found that, as the requirements for a narrow bezel are continuously increased, the bezel design of the display panel is narrower, and accordingly, the pitch between the pads 101' is smaller. Since the space between the bonding pads 101 'is small, once foreign matters w (such as silver paste used in bonding and metal particles generated in cutting) are dropped or bonded on the surface of the bonding pads 101', the foreign matters w are easily bonded between different bonding pads 101', so that the bonding pads 101' are short-circuited, and poor display of the display panel is caused.
In view of the above-mentioned research of the inventor, it is found that the embodiments of the present application provide a display panel and a display device, which can solve the technical problem that short circuit is easy to occur between pads of the display panel in the related art, resulting in poor display of the display panel.
The technical conception of the embodiment of the application is as follows: by changing the shape of the first bonding pads in the display panel, for example, by reducing the width of a partial region (i.e., the extension portion) in the first bonding pads, the distance between the extension portions in two adjacent first bonding pads is increased, and thus, the short circuit caused by the adhesion of foreign matters between the extension portions of the adjacent first bonding pads is improved or even eliminated, and the yield of the display panel is improved.
The following first describes a display panel provided by an embodiment of the present application.
As shown in fig. 2, the display panel 20 provided in the embodiment of the present application includes a display area AA and a non-display area NA. The non-display area NA is provided with a plurality of first pads 201, and the first pads 201 extend in a first direction (Y direction shown in fig. 2). Illustratively, the first pads 201 may include pads on the display panel 20 that overlap with probes of the lighting device at the time of a dot screen test (CT test for short), CT test pads for short. The first pads 201 may further include pads on the display panel 20 that overlap with probes of the lighting device during an array substrate test (abbreviated as AT test), abbreviated as AT test pads. The first pads 201 may further include pads, abbreviated as bonding pads, bonded with the flexible circuit board FPC or the driving IC on the display panel 20. That is, the first pad 201 may be any pad on the display panel 20, which is not limited in the embodiment of the present application.
It is noted that, as different from the shape of the pad in the related art shown in fig. 1, the first pad 201 in the embodiment of the present application includes at least one overlap portion 201a and an extension portion 201b connected to the at least one overlap portion 201a. In the test of the display panel 20, the overlap portion 201a may overlap with a probe of the lighting device, for example. Wherein, the length L1 of the extension 201b along the first direction (Y direction shown in fig. 2) is greater than the length L2 of the overlap 201a along the first direction, and the width W1 of the extension 201b along the second direction (X direction shown in fig. 2) is less than the maximum width W2 of the overlap 201a along the second direction, and the first direction is perpendicular to the second direction. That is, the width of the longer portion region (i.e., the extension portion 201 b) in the first pad 201 is reduced compared to the width of the overlap portion 201a in the first pad 201, thereby increasing the pitch between the longer portion regions in the adjacent first pads 201.
As shown in fig. 1, in the related art, it is assumed that the pitch between two adjacent pads 101' in fig. 1 is 100 micrometers and the diameter of the foreign matter w is 120 micrometers. Since the space between the two pads 101 'is smaller than the diameter of the foreign matter w, the foreign matter w is overlapped (electrically connected) with the two pads 101' at the same time as long as the foreign matter w is located between the two pads 101', resulting in a short circuit between the two pads 101'. As shown in fig. 2, in the embodiment of the present application, since the width of the extension 201b in the first pad 201 is reduced, the interval between the extension 201b in the adjacent two first pads is increased, for example, the interval between the extension 201b in the adjacent two first pads is increased to 200 micrometers. Still taking the diameter of the foreign matter w as 120 micrometers as an example, since the distance between the extending portions 201b in two adjacent first bonding pads is larger than the diameter of the foreign matter w, when the foreign matter w is located between the extending portions 201b in two first bonding pads, the foreign matter w will not overlap with the extending portions 201b in two first bonding pads at the same time, thereby improving or even eliminating the short circuit caused by the bonding of the foreign matter between the extending portions 201b of two adjacent first bonding pads, and improving the yield of the display panel.
Therefore, since the width of the partial region (i.e., the extension portion 201 b) in the first bonding pad is reduced, the distance between the extension portions 201b in the adjacent two first bonding pads is increased, the probability that the foreign matter w is overlapped between the extension portions 201b of the adjacent first bonding pads at the same time is reduced, and thus the short circuit caused by the bonding of the foreign matter between the extension portions of the adjacent first bonding pads is improved, even eliminated, and the yield of the display panel is improved.
As shown in fig. 3, the first pad 201 may optionally include a lap portion 201a, according to some embodiments of the present application. Of the adjacent two first pads 201, the overlap 201a of the first pad 201 (e.g., the first pad from the left in fig. 3) is located on the side of the extension 201b of the first pad 201 near the display area AA, and the overlap 201a of the second first pad 201 (e.g., the second first pad from the left in fig. 3) is located on the side of the extension 201b of the second first pad 201 far from the display area AA. For example, in some specific examples, N first pads 201 are sequentially arranged on the display panel 20, wherein the overlap 201a of the first pads 201 with an odd number is located at a side of the respective extension 201b near the display area AA, the overlap 201a of the first pads 201 with an even number is located at a side of the respective extension 201b far from the display area AA, and N is an integer greater than 1. It is to be understood that, in other specific examples, the overlapping portions 201a of the first pads 201 with odd numbers may be disposed on a side of the respective extending portions 201b away from the display area AA, and the overlapping portions 201a of the first pads 201 with even numbers may be disposed on a side of the respective extending portions 201b closer to the display area AA.
In this way, for example, compared with the mode that the overlapping parts in the two adjacent first bonding pads are arranged on the same side, the overlapping parts in the first bonding pads are positioned on the side, close to the display area, of the extending part in the first bonding pad, of the adjacent first bonding pads, the overlapping parts in the second first bonding pad are positioned on the side, far away from the display area, of the extending part in the second first bonding pad, namely, the overlapping parts of the adjacent first bonding pads are staggered, so that the space of the display panel can be more fully utilized, the overlapping parts of the first bonding pads with more quantity are arranged in the limited space of the display panel, the distance between the overlapping parts of the adjacent first bonding pads can be increased, and the short circuit caused by the adhesion of foreign matters between the overlapping parts of the adjacent first bonding pads is improved or even eliminated.
With continued reference to fig. 3, in accordance with some embodiments of the present application, optionally, the maximum width W2 of the lap portion 201a along the second direction (X direction shown in fig. 3) may be greater than the width of the related art pad (such as the pad 101' shown in fig. 1), so as to increase the area of the first pad 201 where the probe or other pad can lap, thereby facilitating the lap of the first pad 201 with the probe or other pad.
As shown in fig. 4, the first pad 201 may optionally further include two overlap portions 201a, and the two overlap portions 201a are electrically connected through an extension portion 201b, according to other embodiments of the present application. Specifically, in each of the first pads 201, a lap portion 201a is provided on both the side of the extension portion 201b close to the display area AA and the side away from the display area AA, and the two lap portions 201a are electrically connected by the extension portion 201b.
In this way, since the first bonding pad includes two overlapping portions, the overlapping area between the first bonding pad and other overlapping objects can be increased when the first bonding pad overlaps with other overlapping objects (such as bonding pads), and the connection strength between the first bonding pad and other overlapping objects can be improved. For example, when the first pad 201 is overlapped with a pad on the flexible circuit board FPC, since the first pad 201 has two overlapped portions 201a, an overlapped area between the first pad 201 and the pad on the FPC is doubled compared to having only one overlapped portion 201a, thereby improving a connection strength between the first pad 201 and the pad on the FPC.
Optionally, according to some embodiments of the present application, the shape of the orthographic projection of the overlap 201a on the substrate of the display panel 20 includes a circle, an ellipse, or a polygon. The polygon may specifically be an M-polygon, where M is an integer greater than or equal to 3. For example, the polygon may be square, rectangle, parallelogram, diamond, pentagon or hexagon, which is not limited by the embodiment of the present application.
With continued reference to fig. 4, in some embodiments, the shape of the orthographic projection of the landing 201a on the substrate of the display panel 20 may be, in particular, triangular. The triangle may comprise in particular an isosceles triangle or an equilateral triangle, for example.
It is easy to understand that the triangle has good stability, and has the advantages of stability, firmness and pressure resistance. Therefore, since the orthographic projection of the lap joint part on the substrate of the display panel is in a stable triangle shape, the lap joint part has good stability and is not easy to deform.
With continued reference to fig. 4, according to some embodiments of the present application, optionally, any two adjacent first pads 201, where the overlapping portion 201a of the first pad 201 is not parallel to the adjacent two sides of the overlapping portion 201a of the second first pad 201 in the orthographic projection of the substrate of the display panel. For example, the orthographic first side b1 of the lap portion 201a in the first pad 201 is adjacent to the orthographic second side b2 of the lap portion 201a in the second first pad 201, and the first side b1 and the second side b2 may not be parallel.
In this way, since the adjacent first sides and the second sides in the overlapping portions of the adjacent two first bonding pads are not parallel, only one point (e.g., the point d1 in fig. 4) on the first side is closest to the second side, and the other points (e.g., the point d2 in fig. 4) on the first side are all farther away from the second side, thereby reducing the probability of foreign matters adhering between the overlapping portions of the adjacent first bonding pads, improving or even eliminating the short circuit caused by the adhesion of the foreign matters between the overlapping portions of the adjacent first bonding pads, and improving the yield of the display panel.
With continued reference to fig. 4, according to some embodiments of the application, alternatively, the shape of the orthographic projection of the extension 201b on the substrate of the display panel 20 may include a rectangle, and the orthographic projections of the extension 201b in two adjacent first pads 201 on the substrate of the display panel 20 are parallel to each other.
In this way, the orthographic projections of the extending portions in the two adjacent first bonding pads on the substrate of the display panel are parallel to each other, so that the equal spacing between the extending portions in any two adjacent first bonding pads can be ensured. Further, since the width of the extension 201b is small, a large pitch between the extension in any two adjacent first pads can be ensured.
Unlike the embodiment shown in fig. 4, according to other embodiments of the present application, alternatively, the shape of the orthographic projection of the extension 201b on the substrate of the display panel 20 may be in a bent shape, and orthographic projections of the extension 201b in two adjacent first pads 201 on the substrate of the display panel 20 are parallel to each other. In this way, since the shape of the orthographic projection of the extension portion on the substrate of the display panel is in a bent shape and the extension portions in the two adjacent first bonding pads are parallel to each other, the area of the extension portion (i.e., the first bonding pad) can be increased while a larger distance is ensured between the extension portions in the two adjacent first bonding pads. Thus, the bonding area between the first bonding pad and other bonding objects can be increased when the first bonding pad is bonded with other bonding objects (such as bonding pads), and the connection strength between the first bonding pad and other bonding objects can be further improved.
As shown in fig. 5, in some specific embodiments, the shape of the orthographic projection of the extension 201b on the substrate of the display panel 20 may include a zigzag shape, and orthographic projections of the extension 201b in two adjacent first pads 201 on the substrate of the display panel 20 are parallel to each other. The extension 201b is mainly composed of a plurality of line segments, which are connected in turn, and have an included angle between adjacent line segments.
In this way, since the orthographic projection of the extension portion on the substrate of the display panel is in a zigzag shape and the extension portions in the adjacent two first pads are parallel to each other, the area of the extension portion (i.e., the first pad) can be increased while ensuring a larger pitch between the extension portions in the adjacent two first pads. Thus, the bonding area between the first bonding pad and other bonding objects can be increased when the first bonding pad is bonded with other bonding objects (such as bonding pads), and the connection strength between the first bonding pad and other bonding objects can be further improved.
In other specific embodiments, as shown in fig. 6, alternatively, the shape of the orthographic projection of the extension 201b on the substrate of the display panel 20 may include a wave shape, and orthographic projections of the extension 201b in two adjacent first pads 201 on the substrate of the display panel 20 are parallel to each other. The so-called wavy shape, i.e. the extension 201b is mainly composed of a plurality of continuous curves.
In this way, since the shape of the orthographic projection of the extension portion on the substrate of the display panel is wavy and the extension portions in the adjacent two first pads are parallel to each other, the area of the extension portion (i.e., the first pad) can be increased while ensuring a larger pitch between the extension portions in the adjacent two first pads. Thus, the bonding area between the first bonding pad and other bonding objects can be increased when the first bonding pad is bonded with other bonding objects (such as bonding pads), and the connection strength between the first bonding pad and other bonding objects can be further improved.
With continued reference to fig. 6, optionally, the extensions 201b in two adjacent first pads 201 may have a spacing greater than 100 microns in the second direction (X direction shown in fig. 6), according to some embodiments of the application. In a specific example, for example, the pitch of the extension portions 201b in the adjacent two first pads 201 in the second direction is 300 micrometers.
In this way, by reducing the width of the partial area (i.e., the extension portion) in the first bonding pad, the distance between the extension portions in the two adjacent first bonding pads is increased, for example, the distance between the extension portions in the two adjacent first bonding pads is more than 100 micrometers, so that the short circuit caused by the adhesion of the foreign matters between the extension portions of the two adjacent first bonding pads is improved, and the yield of the display panel is improved.
As described above, the first pad 201 in the embodiment of the present application may include a CT test pad. For ease of understanding, the first pad 201 is exemplified as a CT test pad. As shown in fig. 7, the display panel 20 may include a Data line Data, a switching signal control line S1, and a transistor T. The gate of the transistor T is electrically connected to the switching signal control line S1, the first pole of the transistor T is electrically connected to the Data line Data, and the second pole of the transistor T is electrically connected to the first pad 201. Depending on the signal and the type of the gate of each transistor, the first electrode may be used as a source electrode, the second electrode may be used as a drain electrode, or the first electrode may be used as a drain electrode, and the second electrode may be used as a source electrode, which is not distinguished. The overlap portion 201a of the first pad 201 may overlap with a probe of the lighting machine, and the Data line Data may be electrically connected with a subpixel of the display panel 20. Under the control of the on level output by the switch signal control line S1, the transistor T is turned on, and the detection signal from the lighting machine is sequentially transmitted to the sub-pixel through the probe, the first pad 201, the transistor T and the Data line Data, thereby completing the CT test.
Based on the display panel provided by the embodiment, correspondingly, the application further provides a display device. As shown in fig. 8, the display apparatus 1000 may include the device body 10 and the display panel 20 in the above embodiment, and the display panel 20 is covered on the device body 10. Various devices, such as a sensing device, a processing device, etc., may be provided in the apparatus body 10, which is not limited herein. The display device 1000 may be a device having a display function, such as a mobile phone, a computer, a tablet computer, a digital camera, a television, and an electronic paper, and is not limited thereto.
It should be understood that, in the present specification, each embodiment is described in an incremental manner, and the same or similar parts between the embodiments are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. For the display panel embodiment and the display device embodiment, reference may be made to the description of the pixel driving circuit embodiment and the array substrate embodiment. The application is not limited to the specific constructions described above and shown in the drawings. Various changes, modifications and additions may be made by those skilled in the art after appreciating the spirit of the present application. Also, a detailed description of known techniques is omitted herein for the sake of brevity.
Those skilled in the art will appreciate that the above-described embodiments are exemplary and not limiting. The different technical features presented in the different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in view of the drawings, the description, and the claims. In the claims, the term "comprising" does not exclude other structures; the amounts refer to "a" and do not exclude a plurality; the terms "first," "second," and the like, are used for designating a name and not for indicating any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The presence of certain features in different dependent claims does not imply that these features cannot be combined to advantage.
Claims (9)
1. A display panel comprising a display area and a non-display area, the non-display area being provided with a plurality of first pads, the first pads extending in a first direction, the first pads comprising:
the length of the extending part along the first direction is larger than the length of the overlapping part along the first direction, and the width of the extending part along the second direction is smaller than the maximum width of the overlapping part along the second direction, so that the distance between the extending parts in two adjacent first bonding pads along the second direction is increased, and the short circuit caused by bonding of foreign matters between the extending parts of the adjacent first bonding pads is improved;
the first bonding pad comprises two lap joint parts, and the two lap joint parts are electrically connected through the extension part.
2. The display panel of claim 1, wherein the shape of the orthographic projection of the landing portion on the substrate of the display panel comprises a circle, an ellipse, or a polygon.
3. The display panel of claim 2, wherein the shape of the orthographic projection of the landing on the substrate of the display panel comprises a triangle.
4. The display panel of claim 2, wherein any two adjacent first bonding pads, the overlap of a first one of the first bonding pads and the overlap of a second one of the first bonding pads are non-parallel in the orthographic projection of the substrate of the display panel.
5. The display panel according to claim 1, wherein the shape of orthographic projection of the extension portion on the substrate of the display panel is in a bent shape, and orthographic projections of the extension portions in two adjacent first bonding pads on the substrate of the display panel are parallel to each other.
6. The display panel of claim 5, wherein the shape of the orthographic projection of the extension on the substrate of the display panel comprises a zigzag shape or a wavy shape.
7. The display panel of claim 1, wherein the spacing of the extensions in the second direction in adjacent two of the first pads is greater than 100 microns.
8. The display panel according to claim 1, wherein the display panel includes a data line, a switching signal control line, and a transistor;
the gate of the transistor is electrically connected with the switching signal control line, the first pole of the transistor is electrically connected with the data line, and the second pole of the transistor is electrically connected with the first bonding pad.
9. A display device comprising the display panel according to any one of claims 1-8.
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| CN113342201B (en) * | 2017-03-24 | 2022-09-20 | 南京瀚宇彩欣科技有限责任公司 | Testing method of embedded touch display device |
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| JPH11295755A (en) * | 1998-04-09 | 1999-10-29 | Seiko Epson Corp | Method for inspecting wiring board and manufacture of liquid crystal device |
| JP2002313850A (en) * | 2001-04-12 | 2002-10-25 | Sanyo Electric Co Ltd | Tape carrier package and its manufacturing method |
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| JP2006196711A (en) * | 2005-01-13 | 2006-07-27 | Sharp Corp | Semiconductor integrated circuit, testing method thereof and probe card |
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