Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a plurality of liner groups distributed in a first direction; the plurality of liner groups comprise a first liner group and a second liner group which are adjacently arranged; the first liner group and the second liner group are arranged on a first side and a second side which are oppositely arranged and are flush with each other, and a spacer region is formed between the first liner group and the second liner group; the length of the spacer region in the first direction is gradually increased from the first side to the second side; the display panel further comprises a virtual liner structure located in the spacer region, the virtual liner structure, the first liner group and the second liner group are arranged at intervals, and the virtual liner structure is arranged close to the second side. The risk that water vapor intrudes into the liner area can be effectively reduced, and the product reliability can be improved.

Description

[0001] This application is a divisional application with an application date of November 4, 2021, application number 202111299742.5, and invention name “A display panel and display device”. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0003] In the modern communications industry, the market demand for products such as mobile phones, televisions, tablets, notebooks, and digital cameras is growing, and various display devices are also developing towards a higher screen-to-body ratio.

[0004] At present, the mainstream design for connecting the driver chip and panel of flexible OLED (Organic Light-Emitting Diode) products in the industry is flexible bonding technology. The pad design of the display panel and the flexible printed circuit (FPC) is compatible with the straight pad design and the oblique pad design; among them, the test pads on both sides generally adopt a straight design, and the binding pads in the middle generally adopt an oblique design with a gradient angle. However, the ACF (Anisotropic Conductive Film) layer at the junction of the straight pad and the oblique pad is susceptible to water vapor intrusion, creating reliability risks. Summary of the invention

[0005] The present application provides a display panel and a display device. By setting a virtual pad structure in the spacing area between a first pad group and a second pad group, the risk of water vapor invading the pad area can be effectively reduced, which is beneficial to improving product reliability.

[0006] The present application provides a display panel, comprising a plurality of pad groups distributed in a first direction; the plurality of pad groups include a first pad group and a second pad group arranged adjacent to each other;

[0007] A spacer is formed between the first pad group and the second pad group; the length of the spacer in the first direction changes gradually along the second direction; the second direction is perpendicular to the first direction;

[0008] The display panel further includes a dummy pad structure located in the spacing area; the dummy pad structure is spaced apart from the first pad group and the second pad group.

[0009] Optionally, the minimum distance between the virtual pad structure and the first pad group in the first direction and the minimum distance in the second direction are greater than or equal to a preset insulation distance, and the minimum distance between the virtual pad structure and the second pad group in the first direction and the minimum distance in the second direction are greater than or equal to the preset insulation distance.

[0010] Optionally, the first gasket group and the second gasket group are arranged flush on a first side and a second side that are arranged opposite to each other; and the length of the spacer in the first direction gradually increases from the first side to the second side;

[0011] The dummy pad structure is disposed flush with the first pad set and the second pad set on the second side.

[0012] Optionally, a minimum length of the spacing area in the first direction is greater than or equal to a preset insulation distance.

[0013] Optionally, the first pad group includes a plurality of first pads arranged in sequence and at intervals in the first direction; the second pad group includes a plurality of second pads arranged in sequence and at intervals in the first direction;

[0014] Extension lines of the first pad and the second pad intersect near the spacing area.

[0015] Optionally, the width of the first pad, the width of the second pad and the width of the dummy pad structure are equal; or

[0016] The width of the first pad is smaller than that of the second pad, and the width of the dummy pad structure is greater than or equal to the width of the first pad and less than or equal to the width of the second pad.

[0017] Optionally, the virtual pad structure includes a plurality of virtual pads sequentially spaced apart in the first direction;

[0018] The width of the first pad, the width of the second pad and the width of the dummy pad are equal; or

[0019] A width of the first pad is smaller than a width of the second pad, and a width of the dummy pad is greater than or equal to a width of the first pad and smaller than or equal to a width of the second pad.

[0020] Optionally, an angle between an extension direction of the virtual pad structure and the second direction is greater than or equal to 0° and less than 90°.

[0021] Optionally, the virtual pad structure is made of the same material as the first pad group and the second pad group.

[0022] The present application also provides a display device, comprising the display panel described in any one of the above, an adhesive interconnection layer covering the plurality of pad groups, and a circuit board located on the adhesive interconnection layer.

[0023] In the display panel and display device provided by the present application, a virtual pad structure is set in the spacing area between the first pad group and the second pad group, which avoids the existence of a large spacing, can balance the binding force between the spacing area and other positions, and make the ACF evenly filled between the pads, effectively reducing the risk of water vapor intrusion, which is conducive to improving product reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0025] Figure 1 A top view of a display panel provided in an embodiment of the present application.

[0026] Figure 2 for Figure 1 A magnified schematic diagram of local structure A.

[0027] Figure 3 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0033] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a display panel 1, which has a display area 2 and a pad area 3 located on one side of the display area 2; the display panel 1 includes a plurality of pad groups 4 located in the pad area 3 and distributed in a first direction. The plurality of pad groups 4 include a first pad group 5 and a second pad group 6 that are adjacently arranged; a spacing area 7 is formed between the first pad group 5 and the second pad group 6. The length of the spacing area 7 in the first direction changes gradually along the second direction; wherein the second direction is perpendicular to the first direction. The display panel 1 also includes a virtual pad structure 8 located in the spacing area 7; the virtual pad structure 8 is spaced apart from the first pad group 5 and the second pad group 6.

[0034] Specifically, in the embodiment of the present application, the first direction is a horizontal direction, and the second direction is a vertical direction.

[0035] Specifically, the display area 2 of the display panel 1 is electrically connected to the external electronic components through the multiple pad groups 4 of the pad area 3 to achieve the display function. It can be understood that the multiple pad groups 4 are electrically connected to the electronic devices of the display area 2 through wires, and are used to input electrical signals to the electronic devices of the display area 2, or output electrical signals of the display area 2 to the outside; while the virtual pad structure 8 is not electrically connected to the electronic devices of the display area 2, but exists independently in the pad area 3.

[0036] Specifically, the plurality of pad groups 4 of the pad area 3 are connected to external electronic components via an adhesive interconnect layer covering the pad area 3; wherein the adhesive interconnect layer has conductivity and adhesiveness, and an anisotropic conductive film (ACF) is usually used as the adhesive interconnect layer.

[0037] Specifically, the number of the spacer 7 can be multiple, that is, the number of adjacently arranged first pad groups 5 and / or second pad groups 6 can be multiple. When the number of the first pad groups 5 and the second pad groups 6 is multiple, the multiple first pad groups 5 and the multiple second pad groups 6 can be arranged alternately in sequence, of course, but are not limited to this. The embodiment of the present application takes a first pad group 5 and two second pad groups 6 arranged on both sides of the first pad group 5 as an example. It can be understood that each spacer 7 is provided with a virtual pad structure 8.

[0038] Specifically, the dummy pad structure 8 is made of the same material as the first pad group 5 and the second pad group 6 , that is, the dummy pad structure 8 and the first pad group 5 and the second pad group 6 are formed in the same process, but the present invention is certainly not limited thereto.

[0039] Specifically, the first pad group 5 and the second pad group 6 are arranged flush with each other on the opposite first side 9 and the second side 10; the length of the spacer area 7 in the first direction gradually increases from the first side 9 to the second side 10; the virtual pad structure 8 is arranged flush with the first pad group 5 and the second pad group 6 on the second side 10.

[0040] It can be understood that the first side 9 and the second side 10 are arranged opposite to each other in the second direction, and the spacer 7 is trapezoidal in shape, that is, the spacer 7 has a short side 11 located on the first side 9 and a long side 12 located on the second side 10 .

[0041] Specifically, the minimum value of the length of the spacer 7 in the first direction is greater than or equal to the preset insulation distance. It is understandable that the length of the short side 11 of the spacer 7 located on the first side 9 is greater than or equal to the preset insulation distance. It should be noted that the preset insulation distance in the present application is the minimum insulation distance. Specifically, the minimum insulation distance is related to the pad design and ACF model of the display panel 1. In a specific embodiment, the minimum insulation distance is 40 microns (um).

[0042] It can be understood that the minimum spacing between the first pad group 5 and the second pad group 6 in the first direction is greater than or equal to the preset insulation distance, and in the embodiment of the present application, the position of the minimum spacing between the first pad group 5 and the second pad group 6 in the first direction is on the first side 9, and the position of the maximum spacing between the first pad group 5 and the second pad group 6 in the first direction is on the second side 10.

[0043] Since it is necessary to ensure the minimum insulation distance between the first pad group 5 and the second pad group 6 on the first side 9, the distance between the first pad group 5 and the second pad group 6 on the second side 10 is very large, and the excessively large distance will lead to uneven binding force at different positions of the pad area 3 during the pad binding process. For example, the binding force between the first pad group 5 and the second pad group 6 is quite different from the binding force of the spacing area 7, which makes the ACF not firmly stacked and bonded in the spacing area 7. When the display product is verified for reliability, at the position where the distance between the first pad group 5 and the second pad group 6 is large, the ACF is more likely to release stress and produce gaps, making it easier for water vapor to invade and easily causing reliability risks. In response to the above problems, the present application sets a virtual pad structure 8 in the spacing area 7 between the first pad group 5 and the second pad group 6, avoiding the existence of a large distance, balancing the binding force between the spacing area 7 and other positions, making the ACF uniformly filled between the pads, effectively reducing the risk of water vapor invasion, and helping to improve product reliability.

[0044] Specifically, the minimum distance D1 in the first direction and the minimum distance D2 in the second direction between the virtual pad structure 8 and the first pad group 5 are greater than or equal to the preset insulation distance, and the minimum distance D3 in the first direction and the minimum distance in the second direction between the virtual pad structure 8 and the second pad group 6 are greater than or equal to the preset insulation distance. The above design can prevent the virtual pad structure 8 from interfering with the first pad group 5 and the second pad group 6 due to the small spacing between the virtual pad structure 8 and the first pad group 5 and the second pad group 6.

[0045] Specifically, the first pad group 5 includes a plurality of first pads 13 arranged in sequence and at intervals in the first direction; the second pad group 6 includes a plurality of second pads 14 arranged in sequence and at intervals in the first direction; the extension lines of the first pads 13 and the second pads 14 near the spacing area 7 intersect. Specifically, in the embodiment of the present application, the angle between the extension direction of at least some of the first pads 13 and the second direction is greater than 0° and less than 90°, and the extension direction of each second pad 14 is parallel to the second direction. Of course, in other embodiments, the angle between the extension direction of at least some of the second pads 14 and the second direction is greater than 0° and less than 90°, in which case the first pads 13 and the second pads 14 deviate from the second direction in opposite directions.

[0046] It can be understood that the first pad group 5 in the embodiment of the present application is an oblique pad group, and the second pad group 6 is a straight pad group. Specifically, the first pad 13 is a test pad, and the second pad 14 is a binding pad.

[0047] In one embodiment, each first pad 13 extends in the same direction, and each second pad 14 extends in the same direction. In another embodiment, the angle between the first pads 13 and the second direction increases gradually from the middle to both sides, and each second pad 14 extends in the same direction.

[0048] In one embodiment, the width of the first pad 13, the width of the second pad 14 and the width of the dummy pad structure 8 are equal. In another embodiment, the width of the first pad 13 is smaller than the width of the second pad 14, and the width of the dummy pad structure 8 is greater than or equal to the width of the first pad 13 and less than or equal to the width of the second pad 14. It can be understood that the width of the pad is the length of the pad in the first direction.

[0049] Specifically, the angle between the extension direction of the virtual pad structure 8 and the second direction is greater than or equal to 0° and less than 90°.

[0050] Specifically, the projection shape of the virtual pad structure 8 in the direction perpendicular to the display panel 1 can be a rectangle, a parallelogram, or a trapezoid, which is not limited in the embodiment of the present application.

[0051] Specifically, Figure 3 As shown, the display panel 1 includes a base substrate 15 and a display function layer 16 disposed on the base substrate 15; wherein the display function layer 16 is disposed in the display area. It can be understood that a plurality of pad groups 4 are disposed on the base substrate 15. Figure 1 As shown, in the embodiment of the present application, the display area 2 and the pad area 3 are located on the same plane. In another embodiment, the pad area is located on the side of the base substrate, and the present application does not limit the specific position of the pad area.

[0052] In this embodiment, the present application sets a virtual pad structure 8 in the spacing area 7 between the first pad group 5 and the second pad group 6, which avoids the existence of a large spacing, can balance the binding force between the spacing area 7 and other positions, and make the ACF evenly filled between the pads, effectively reducing the risk of water vapor intrusion, which is beneficial to improving product reliability.

[0053] The present application also provides a display panel, which is different from the above display panel in that the virtual pad structure includes a plurality of virtual pads arranged in sequence in a first direction. Specifically, when the area of ​​the spacing region is large, a plurality of virtual pads can be arranged as the virtual pad structure, and when the area of ​​the spacing region is not enough to arrange a plurality of virtual pads, only one virtual pad is arranged as the virtual pad structure.

[0054] In one embodiment, the width of the first pad, the width of the second pad and the width of the dummy pad are equal. In another embodiment, the width of the first pad is smaller than the width of the second pad, and the width of the dummy pad is greater than or equal to the width of the first pad and less than or equal to the width of the second pad.

[0055] In this embodiment, the present application sets a virtual pad structure in the spacing area between the first pad group and the second pad group, which avoids the existence of a large spacing, can balance the binding force between the spacing area and other positions, and make the ACF evenly filled between the pads, effectively reducing the risk of water vapor intrusion, which is beneficial to improving product reliability.

[0056] Of course, in other embodiments, a hollow structure may be further provided on the virtual pad structure, and the specific shape of the hollow structure is not limited.

[0057] like Figure 3 As shown, an embodiment of the present application further provides a display device 17 , comprising the display panel 1 in any one of the above embodiments, an adhesive interconnect layer 18 covering a plurality of pad groups 4 , and a circuit board 19 located on the adhesive interconnect layer 18 .

[0058] Specifically, the adhesive interconnection layer 18 has electrical conductivity and adhesiveness, and is generally made of an anisotropic conductive film (ACF).

[0059] Specifically, the circuit board 19 includes a flexible circuit board, and the display device 17 also includes a main circuit board electrically connected to the flexible circuit board. The embodiment of the present application does not limit the specific type of the flexible circuit board.

[0060] In this embodiment, the present application sets a virtual pad structure in the spacing area between the first pad group and the second pad group, which avoids the existence of a large spacing, can balance the binding force between the spacing area and other positions, and make the ACF evenly filled between the pads, effectively reducing the risk of water vapor intrusion, which is beneficial to improving product reliability.

[0061] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0062] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: The invention comprises a plurality of pad groups distributed in a first direction; the plurality of pad groups comprises a first pad group and a second pad group arranged adjacent to each other; the first pad group and the second pad group are arranged flush with each other on a first side and a second side arranged opposite to each other, and a spacer is formed between the first pad group and the second pad group; the length of the spacer in the first direction gradually increases from the first side to the second side; The display panel further includes a dummy pad structure located in the spacing area, the dummy pad structure is spaced apart from the first pad group and the second pad group, and the dummy pad structure is disposed close to the second side.

2. The display panel according to claim 1, characterized in that: The dummy pad structure is disposed flush with the first substrate set and the second pad set at the second side.

3. The display panel according to claim 1, characterized in that: The first pad group includes a plurality of first pads arranged in sequence and at intervals in the first direction; the second pad group includes a plurality of second pads arranged in sequence and at intervals in the first direction; The width of the first pad is smaller than that of the second pad, and the width of the dummy pad structure is greater than or equal to the width of the first pad and less than or equal to the width of the second pad.

4. The display panel according to claim 3, characterized in that: The included angle between the extension direction of at least part of the first pads and the second direction is greater than 0° and less than 90°, the extension direction of each of the second pads is parallel to the second direction, and the second direction is perpendicular to the first direction.

5. The display panel according to claim 4, characterized in that: The angles between the first pads and the second direction gradually increase from the middle to both sides.

6. The display panel according to claim 4, characterized in that: An angle between an extension direction of the virtual pad structure and the second direction is greater than or equal to 0° and less than 90°.

7. The display panel according to any one of claims 1 to 6, characterized in that: The plurality of pad groups include one first pad group and two second pad groups, and the two second pad groups are respectively arranged on both sides of the first pad group in the first direction.

8. The display panel according to any one of claims 1 to 6, characterized in that: The minimum distance between the virtual pad structure and the first pad group in the first direction and the minimum distance in the second direction are greater than or equal to a preset insulation distance, the minimum distance between the virtual pad structure and the second pad group in the first direction and the minimum distance in the second direction are greater than or equal to the preset insulation distance, and the second direction is arranged perpendicular to the first direction; A minimum length of the spacing region in the first direction is greater than or equal to a preset insulation distance.

9. The display panel according to claim 8, characterized in that: The preset insulation distance is equal to 40 micrometers.

10. A display device, characterized in that: The display panel comprises the display panel as claimed in any one of claims 1 to 9, an adhesive interconnection layer covering the plurality of pad groups, and a circuit board located on the adhesive interconnection layer.

Images