Display panel and display device

Abstract

The invention discloses a display panel and a display device, and the display panel comprises a substrate which comprises an array circuit layer and a counter electrode, the substrate further comprises a first stress release part, and the counter electrode further comprises a second stress release part; a light-emitting element; wherein the first stress release parts are distributed along at least part of the circumferential side of each electrode in the counter electrode, the counter electrode and the light-emitting element are overlapped to form a lap joint area, and the second stress release parts are arranged along at least part of the edge of the lap joint area. According to the display panel and the display device provided by the embodiment of the invention, by arranging the first stress release part along the partial peripheral side of each electrode in the counter electrode, partial stress concentration between the partial peripheral side of the counter electrode and the array circuit layer is released; according to the display panel, the second stress release part is arranged on the counter electrode along at least part of the edge of the lap joint area where the counter electrode and the light-emitting element are overlapped, so that stress concentration at part of the edge of the lap joint area is released, the risk of poor contact and even unsoldering is avoided, and the service life of the display panel is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of display equipment, and in particular to a display panel and a display device. Background Art

[0002] With the development of display technology, display devices (such as mobile phones, tablets, wearable bracelets or TVs, etc.) have been widely used, and users' requirements for display devices have gradually increased. Display devices are gradually developing towards thinness, flexibility and full screen. In flexible display products, the display panel in the display device needs to be bent repeatedly at multiple angles. During the bending process, stress concentration occurs at the welding position between the light-emitting component and the pad on the substrate, which can easily cause poor contact between the light-emitting component and the pad or even desoldering, affecting the service life of the display panel. Summary of the invention

[0003] The embodiments of the present application provide a display panel and a display device, which can increase the service life of the display panel used in a bendable display product.

[0004] In a first aspect, an embodiment of the present application provides a display panel, comprising: a substrate, comprising an array circuit layer and a counter electrode, the counter electrode being arranged on one side of the array circuit layer and distributed in an array, the substrate further comprising a first stress release portion, and the counter electrode further comprising a second stress release portion; a light-emitting element, the light-emitting element being arranged on the side of the counter electrode facing away from the array circuit layer; wherein the first stress release portion is distributed along at least a portion of the circumference of each electrode in the counter electrode, the counter electrode and the light-emitting element overlap to form an overlapping area, and the second stress release portion is arranged along at least a portion of the edge of the overlapping area.

[0005] In a second aspect, an embodiment of the present application provides a display device, comprising the display panel described in any embodiment of the first aspect of the present application.

[0006] The display panel and display device provided in the embodiments of the present application are provided with a first stress release portion along a portion of the circumference of each electrode in the counter electrode to release the stress concentration between a portion of the circumference of the counter electrode and the array circuit layer; a second stress release portion is provided on the counter electrode along at least a portion of the edge of the overlapping area where the counter electrode and the light-emitting element overlap to release the stress concentration at a portion of the edge of the overlapping area, thereby avoiding the risk of poor contact or even desoldering between the light-emitting element and the counter electrode, and between the counter electrode and the array circuit layer when the display panel is bent and used, thereby improving the service life of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0008] Figure 1It is a schematic diagram of a planar structure of a display panel provided by an embodiment of the first aspect of the present application;

[0009] Figure 2 yes Figure 1 An enlarged structural diagram of the A region in FIG.

[0010] Figure 3 yes Figure 2 A cross-sectional structure diagram along the BB direction;

[0011] Figure 4 yes Figure 1 Another enlarged structural diagram of the A region in FIG.

[0012] Figure 5 yes Figure 1 Another enlarged structural diagram of the A region in FIG.

[0013] Figure 6 yes Figure 1 Another enlarged structural diagram of the A region in FIG.

[0014] Figure 7 yes Figure 2 A side view of the structure along one side of the C direction;

[0015] Figure 8 yes Figure 2 A side view of another structure along one side of the C direction;

[0016] Fig. 9 yes Figure 2 The cross-sectional structure diagram along the DD direction;

[0017] Fig.10 yes Figure 1 Another enlarged structural diagram of the A area in the middle;

[0018] Fig.11 yes Figure 1 Another enlarged structural diagram of the A area in the middle;

[0019] Fig.12 yes Figure 1 Another enlarged structural diagram of the A area in the middle;

[0020] Fig.13 yes Figure 2 Another cross-sectional structure diagram along the BB direction;

[0021] Fig.14 It is a structural diagram of a display device provided in an embodiment of the second aspect of the present application.

[0022] in:

[0023] 100-display panel;

[0024] 10-substrate; 11-array circuit layer; 12-counter electrode; LA-lapping area; 101-first stress release portion; 102-second stress release portion;

[0025] 120-electrode block; 120a-first side; 120b-second side; 120c-first overlapping edge; 120d-second overlapping edge; 102a-first sub-section; 102b-second sub-section;

[0026] 121 - first electrode block; 122 - second electrode block; 120e - third side surface;

[0027] 13-covering layer; 131-through groove; 111-exposed portion;

[0028] 20-light emitting element;

[0029] G1-first groove; G2-second groove; G3-third groove; H0-through hole;

[0030] X-first direction;

[0031] 1000-display device.

[0032] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0033] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0035] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the display panel and display device of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] In the related art, display products composed of micro light emitting diodes (Micro-LED) have application scenarios where the panel needs to be bent.

[0037] Among them, to prepare the Micro-LED panel into display products such as foldable screen mobile phones or other flexible display products, it is necessary to repeatedly bend one or more parts of the panel at one or more angles during the use of the product. For example, in a foldable screen mobile phone, the panel at the bending hinge needs to be repeatedly bent at a single angle, or in a flexible fabric display product, the panel needs to be repeatedly bent at multiple angles and multiple locations.

[0038] When the Micro-LED display product is applied to curved scenes, one of the problems is that the welding position between the light-emitting components in the Micro-LED panel and the contact electrodes on the substrate is fixed by mechanical connection, such as welding or bonding. Therefore, in the curved use scenario, the stress distribution of the panel is redistributed compared to the flat state, and the panel has stress concentration near the light-emitting components and the contact electrodes.

[0039] In the horizontal type Micro-LED light-emitting components, the light-emitting components need to overlap with the two contact electrodes on the substrate and the structure of the light-emitting components between the two contact electrodes is suspended. Compared with the vertical type Micro-LED light-emitting components, the risk of stress concentration is greater. And the stress concentration problem of the horizontal type Micro-LED light-emitting components is mainly reflected in the contact electrode in the panel and the substrate contact side and the overlap position of the contact electrode and the light-emitting component.

[0040] When the bending direction is toward the light-emitting component, the light-emitting component and the contact electrode are mainly subjected to compressive stress; when the bending direction is away from the light-emitting component, the light-emitting component and the contact electrode are mainly subjected to tensile stress.

[0041] In the usage scenario of repeated bending, compressive stress and tensile stress are repeatedly switched. The stress concentration problem will not only cause material fatigue of the contact electrode after repeated bending, eventually leading to fracture or change in material properties, thereby causing the contact electrode to lose conductivity. The stress concentration at the light-emitting component may also cause the peak of the light-emitting spectrum to shift, resulting in problems such as display color difference.

[0042] Therefore, out of technical needs and considerations for solving the above-mentioned technical problems, the embodiments of the present application provide a display panel and a display device.

[0043] Figure 1 1 shows a planar structure of a display panel 100 provided in an embodiment of the first aspect of the present application. Figure 2 Shows Figure 1 An enlarged structure of the A region in Figure 3 Shows Figure 2 A cross-sectional structure along the BB direction.

[0044] See also Figures 1 to 3 In a first aspect, an embodiment of the present application provides a display panel 100 , including a substrate 10 and a light emitting element 20 .

[0045] The substrate 10 includes an array circuit layer 11 and counter electrodes 12 . The counter electrodes 12 are disposed on one side of the array circuit layer 11 and are distributed in an array. The substrate 10 also includes a first stress release portion 101 . The counter electrodes 12 also include a second stress release portion 102 .

[0046] The light emitting element 20 is disposed on the side of the counter electrode 12 facing away from the array circuit layer 11 .

[0047] The first stress release portion 101 is distributed along at least part of the circumference of each electrode in the counter electrode 12 , the counter electrode 12 overlaps with the light emitting element 20 to form an overlapping area LA, and the second stress release portion 102 is arranged along at least part of the edge of the overlapping area LA.

[0048] The display panel 100 provided in the first aspect of the embodiment of the present application is provided with a first stress release portion 101 along a portion of the circumference of each electrode in the counter electrode 12 to release the stress concentration between a portion of the circumference of the counter electrode 12 and the array circuit layer 11; a second stress release portion 102 is provided on the counter electrode 12 along at least a portion of the edge of the overlapping area LA where the counter electrode 12 and the light-emitting element 20 overlap to release the stress concentration at a portion of the edge of the overlapping area LA, thereby avoiding the risk of poor contact or even desoldering between the light-emitting element 20 and the counter electrode 12, and between the counter electrode 12 and the array circuit layer 11 when the display panel 100 is bent and used, thereby improving the service life of the display panel 100.

[0049] The substrate 10 includes a supporting substrate material and an array circuit layer 11 covering the substrate material. The substrate material provides mechanical support strength for the entire display panel 100 and has a certain elastic deformation space for bending and deformation, which can be suitable for bending application scenarios of the display panel 100.

[0050] Optionally, the substrate material is polyimide (PI), which has good transparency and flexibility.

[0051] The array circuit layer 11 is used to lay out the light-emitting driving circuit that drives the light-emitting element 20 to emit light, the power supply circuit that supplies power to the entire display panel 100, and other control circuit wiring. One side of the array circuit layer 11 also needs to be provided with a counter electrode 12 for connecting to the light-emitting elements 20 transferred in batches to the display panel 100.

[0052] The light-emitting element 20 is arranged on the side of the counter electrode 12 facing away from the array circuit layer 11, which should be understood as follows: the light-emitting element 20 is connected to the array circuit layer 11 through the counter electrode 12, and the light-emitting element 20 itself includes an internal electrode corresponding to the counter electrode 12, so that the light-emitting driving circuit in the array circuit layer 11 can drive the light-emitting element 20 to electroluminesce.

[0053] Optionally, the light emitting element 20 is a micro light emitting diode Micro-LED, and the size of the light emitting element 20 is less than 100 microns.

[0054] Optionally, the light emitting element 20 is a mini light emitting diode (Mini Light Emitting Dioxide, Mini-LED), and the size of the light emitting element 20 is slightly larger than that of the Micro-LED, and the size range is between 200 microns and 300 microns.

[0055] Each electrode in the counter electrode 12 should be understood to include multiple individual electrodes in the counter electrode 12. In the counter electrode 12, each individual electrode needs to overlap with the light-emitting element 20, so there is a problem of stress concentration along the circumference of each electrode, and the first stress release portion 101 needs to be arranged around the circumference of each individual electrode in the counter electrode 12, rather than only around the periphery of the counter electrode 12.

[0056] The distribution of the first stress release portion 101 along at least part of the circumference of each electrode should be understood as that each electrode can flexibly adjust the position of the first stress release portion 101 according to the position of the display panel 100 and the bending angle in the bending scenario, and the first stress release portion 101 is still distributed along the circumference of each electrode in the electrode 12 at the required position.

[0057] Optionally, when the display panel 100 is bent repeatedly along only one direction, the first stress release portion 101 is arranged along the same direction and at two opposite ends of each electrode in the pair of electrodes 12 along the same direction, and the first stress release portions 101 at these two ends are also distributed along the circumferential sides of each electrode in the pair of electrodes 12.

[0058] Optionally, when the display panel 100 needs to be bent repeatedly along certain directions, the first stress release portion 101 is arranged along these directions and is arranged at multiple locations of each electrode in the pair of electrodes 12 at two opposite ends along these directions. At these positions, the first stress release portion 101 is also distributed along the circumferential sides of each electrode in the pair of electrodes 12.

[0059] The first stress release portion 101 is arranged along at least part of the circumference of each electrode in the counter electrode 12, and can change the stress distribution on the contact surface between the counter electrode 12 and the array circuit layer 11 so that the stress is partially concentrated at the position of the first stress release portion 101. The edge of the contact surface between the counter electrode 12 and the array circuit layer 11 is no longer the stress peak position, so that the stress is distributed as evenly as possible, thereby releasing the stress concentration along the circumference of each electrode on one side of the array circuit.

[0060] The counter electrode 12 overlaps with the light emitting element 20 to form an overlap area LA. The overlap area LA should be understood as the overlap area between the orthographic projection of the light emitting element 20 on the substrate 10 and the counter electrode 12. The overlap area LA is a specific area defined on the counter electrode 12 after the light emitting element 20 overlaps with the counter electrode 12. The light emitting element 20 is not only electrically connected to the counter electrode 12 through the overlap area LA, but also supported by the overlap area LA of the counter electrode 12. Therefore, there is also a stress concentration problem along at least part of the edge of the overlap area LA.

[0061] The second stress release portion 102 is arranged along at least a portion of the edge of the overlapping area LA, which should be understood as the distance between the second stress release portion 102 and the edge of the overlapping area LA does not exceed a certain value. According to the position of the second stress release portion 102 and the selection of its own size, there may be multiple situations for the overlapping relationship between the second stress release portion 102 and the overlapping area LA.

[0062] Optionally, the orthographic projection of the second stress release portion 102 on the counter electrode 12 does not overlap with the overlapping area LA, and there is a certain distance between the second stress release portion 102 and the edge of the overlapping area LA.

[0063] Optionally, the orthographic projection of the second stress release portion 102 on the counter electrode 12 partially overlaps with the overlapping area LA.

[0064] Optionally, the orthographic projection of the second stress release portion 102 on the counter electrode 12 is located within the overlapping area LA.

[0065] The second stress release portion 102 is arranged along at least a portion of the edge of the overlapping area LA, and can change the stress distribution of the overlapping area LA so that the stress is partially concentrated at the position of the second stress release portion 102. At least a portion of the edge of the overlapping area LA is no longer the stress peak position, so that the stress is distributed as evenly as possible, thereby releasing the stress concentration on at least a portion of the edge of the overlapping area LA between the electrode 12 and the light-emitting element 20.

[0066] Optionally, the second stress release portion 102 is disposed along a portion of the edge of the overlapping area LA, and can re-change the stress distribution near another portion of the edge of the overlapping area LA.

[0067] Optionally, the second stress release portion 102 is disposed along a portion of the edge of the overlapping area LA, and can re-change the stress distribution near the same portion of the edge of the overlapping area LA.

[0068] The stress concentration along the peripheral sides of each electrode and at least part of the edge of the overlapping area LA on one side of the array line can be released, and the stress concentration inside the light-emitting element 20 can also be released at the same time, avoiding the risk of the peak of the light-emitting spectrum of the light-emitting element 20 being shifted due to stress concentration.

[0069] The specific embodiments will be further described in other specific implementation methods in the following sections.

[0070] See also Figure 2 In some embodiments, the electrode 12 includes two electrode blocks 120 that are opposite to and spaced apart from each other in the first direction X, each electrode block 120 includes a first side surface 120a and a second side surface 120b that are opposite to each other in the first direction X, and the overlapping area LA extends from the first side surface 120a to the second side surface 120b.

[0071] The second stress release portion 102 includes a first sub-portion 102 a disposed on at least one of the first side surface 120 a and the second side surface 120 b , and the orthographic projection of the light emitting element 20 on the substrate 10 covers the first sub-portion 102 a .

[0072] In these embodiments, the edge of the overlapping area LA extends from the first side 120a to the second side 120b, and the second stress release portion 102 includes a first sub-portion 102a which is arranged on the first side 120a and the second side 120b and is covered by the orthographic projection of the light-emitting element 20 on the substrate 10, so that the stress is re-concentrated at the position of the first sub-portion 102a, and the stress concentration at the edge of the overlapping area LA between the first side 120a and the second side 120b can be released.

[0073] The first direction X may be any direction, and the embodiment of the present application does not specifically limit the specific direction of the first direction X. In the embodiment of the present application, it is only necessary to limit the direction in which the electrodes are arranged relative to each other and spaced apart to be consistent with the direction in which the first side surface 120a and the second side surface 120b of the electrode block 120 are arranged relative to each other, so as to maximize the number of light-emitting elements 20 in the display panel 100 and reduce the occupied area, thereby improving the pixel density.

[0074] Optionally, the first direction X is parallel to the edge of the display panel 100 , which can further increase the number of light emitting elements 20 in the display panel 100 and reduce the occupied area, thereby further improving the pixel density.

[0075] The overlapping area LA extends to the first side 120a and the second side 120b of the electrode block 120. It should be understood that the light-emitting element 20 is distributed near the side of the first side 120a of the electrode block 120 of the electrode 12 away from the second side 120b and near the side of the second side 120b of the electrode block 120 away from the first side 120a, so that when the light-emitting element 20 is arranged along the first direction X, the overlapping area LA between the light-emitting element 20 and the electrode block 120 is maximized, thereby reducing the risk of poor contact or even desoldering between the light-emitting element 20 and the electrode block 120.

[0076] Optionally, the arrangement direction of the light emitting elements 20 deviates from the first direction X at a certain angle, so as to further increase the area of ​​the overlapping region LA and reduce the risk of poor contact or even desoldering.

[0077] Since the overlapping area LA extends to the first side surface 120a and the second side surface 120b of the electrode block 120, the first sub-portion 102a of the second stress release portion 102 is arranged on at least one of the first side surface 120a and the second side surface 120b, and the light-emitting elements 20 are distributed near the side of the first side surface 120a away from the second side surface 120b and the side of the first side surface 120a away from the second side surface 120b. Therefore, the orthographic projection of the light-emitting element 20 on the substrate 10 can cover the first sub-portion 102a.

[0078] The orthographic projection of the light-emitting element 20 on the substrate 10 covers the first sub-portion 102a, so that the first sub-portion 102a does not protrude from the edge of the light-emitting element 20, thereby preventing the setting of the first sub-portion 102a from affecting the mechanical connection strength and electrical connection stability between the electrode block 120 and the light-emitting element 20.

[0079] The first sub-section 102a is set on at least one of the first side surface 120a and the second side surface 120b, which can change the stress distribution of the overlapping area LA so that the stress is partially re-concentrated on the position of the first sub-section 102a. The edge between the first side surface 120a and the second side surface 120b of the overlapping area LA is no longer the stress peak position, so that the stress is distributed as evenly as possible, thereby releasing the stress concentration at the edge between the first side surface 120a and the second side surface 120b of the overlapping area LA.

[0080] Figure 4 Shows Figure 1 Another enlarged structure of region A in Figure 5 It also shows Figure 1 Another enlarged structure of region A in .

[0081] See also Figure 4 and Figure 5 In some embodiments, the second stress release portion 102 includes a plurality of first sub-portions 102 a.

[0082] In these embodiments, the first sub-portions 102a distributed on at least one of the first side 120a and the second side 120b include a plurality of first sub-portions 102a, which can further concentrate more stress on the positions of the plurality of first sub-portions 102a, and the stress is further evenly distributed along the first side 120a or the second side 120b, further releasing the stress concentration at the edge of the overlapping area LA between the first side 120a and the second side 120b.

[0083] See also Figure 4 In some embodiments, the sizes of the plurality of first sub-portions 102a disposed on the first side surface 120a or the second side surface 120b gradually decrease from the center to both sides.

[0084] In these embodiments, multiple first sub-portions 102a are distributed on the same side of the first side 120a or the second side 120b, and their sizes decrease from the center to both sides, so that the stress in the middle position of the first side 120a or the second side 120b, which is farthest from the edge of the overlapping area LA between the first side 120a and the second side 120b, increases the most, and the stress at both ends slightly closer to the first side 120a or the second side 120b increases less, thereby further achieving uniform distribution of stress, thereby releasing the stress concentration at the edge between the first side 120a and the second side 120b of the overlapping area LA.

[0085] See also Figure 5 In some embodiments, the first sub-portion 102a disposed on the first side surface 120a is aligned with the first sub-portion 102a disposed on the second side surface 120b.

[0086] In these embodiments, the alignment setting makes the stress distribution of the first side surface 120a and the second side surface 120b consistent, further achieving uniform stress distribution, thereby further relieving the stress concentration at the edge between the first side surface 120a and the second side surface 120b of the overlapping area LA.

[0087] Figure 6 Shows Figure 1 Another enlarged structure of region A in .

[0088] See also Figure 6 In some embodiments, the first sub-portion 102a is disposed on the first side surface 120a, and the first stress release portion 101 is disposed along the second side surface 120b.

[0089] In these embodiments, the first sub-portion 102 a cooperates with the first stress release portion 101 to further significantly reduce the edge stress of the peripheral sides of each electrode in the electrode 12 and the overlapping area LA.

[0090] Optionally, the first sub-portion 102a is disposed on the second side surface 120b, and the first stress release portion 101 is disposed along the first side surface 120a.

[0091] The positional relationship between the first sub-portion 102a and the first stress release portion 101 defined here should be understood as that the first sub-portion 102a is arranged on one of the first side surface 120a and the second side surface 120b that are relatively arranged, and the first stress release portion 101 is arranged on the other of the first side surface 120a and the second side surface 120b. It is only necessary to define the first side surface 120a and the second side surface 120b as two surfaces of the electrode block 120 that are relatively arranged along the first direction X, and the first sub-portion 102a and the first stress release portion 101 are distributed on different surfaces and are also relatively arranged.

[0092] The specific positions of the first side surface 120a and the second side surface 120b are not limited in this embodiment of the present application.

[0093] By conducting a stress distribution simulation test with a bending radius of 12.5 mm on the setting of the first sub-portion 102a and the first stress release portion 101 in this embodiment, the size of the light-emitting element 20 is set to 50 μm*20 μm*5 μm, the thickness of the substrate 10 is 38 μm, and the thickness of the electrode block 120 is 2 μm. When the first sub-portion 102a and the first stress release portion 101 are not set, the local stress can reach a maximum of more than 200 MPa, which will cause the electrode block 120 to crack.

[0094] Taking into account the usage scenario of repeated bending, the actual bending radius is larger than 12.5 mm.

[0095] After the first sub-portion 102a and the first stress release portion 101 are provided in accordance with the configuration of this embodiment, after simulation testing, the stress peak is reduced to 35.4% of the stress peak when not provided, so that the edge stress of each electrode side and the overlapping area LA in the electrode 12 is further significantly reduced.

[0096] See also Figure 2 In some embodiments, the first sub-portion 102a is a first groove G1 formed by being recessed in a direction from the first side surface 120a to the second side surface 120b or in a direction from the second side surface 120b to the first side surface 120a.

[0097] In these embodiments, the first sub-portion 102a is a first groove G1, which can release the stress concentration at the edge of the overlapping area LA between the first side surface 120a and the second side surface 120b, and facilitate processing of the electrode 12 block to obtain the first groove G1.

[0098] Figure 7 Shows Figure 2 The structure along one side of the C direction, Figure 8 Shows Figure 2 Another structure along one side of the C direction.

[0099] See also Figure 7 When the first groove G1 is connected only to one side where the electrode block 120 overlaps with the light emitting element 20 , the first groove G1 can only release the stress concentration at the edge of the overlapping area LA.

[0100] See also Figure 8 In some embodiments, the first groove G1 penetrates the electrode block 120 along the thickness direction of the electrode block 120 .

[0101] In these embodiments, the first groove G1 can further release the stress concentration on the other side of the overlap between the electrode block 120 and the substrate 10, and further achieve uniform stress distribution on the edges of the contact surfaces between each electrode in the electrode 12 and the substrate 10 and the edges of the overlap area LA, with simple processing and high production efficiency.

[0102] In some embodiments, the orthographic projection of the first groove G1 on the substrate 10 is an elliptical arc.

[0103] In these embodiments, the elliptical arc-shaped first groove G1 can not only achieve relatively uniform stress distribution inside the first groove G1 , but also facilitate processing and high production efficiency.

[0104] In the related art, the design of the notch shape will affect the stress distribution inside the notch at the notch position. In order to make the stress inside the first groove G1 evenly distributed, the notch shape and the edge of the structure near the notch are streamlined. The better the transition treatment of the notch shape, the more even the stress distribution, but the greater the processing difficulty.

[0105] Selecting an elliptical arc as the shape of the first groove G1 can achieve a certain transition between the shape of the first groove G1 and the edge of the nearby structure, and at the same time, the stress is relatively evenly distributed, while taking into account the advantages of simple processing technology, facilitating batch processing and high production efficiency.

[0106] Preferably, the elliptical arc shape of the first groove G1 is bilaterally symmetrical, further enabling uniform stress distribution.

[0107] In some embodiments, the light emitting element 20 is in the shape of an elongated strip, and the width of the first groove G1 does not exceed the width of the light emitting element 20 .

[0108] In these embodiments, it can be further ensured that the first groove G1 is located within the orthographic projection of the light emitting element 20 on the substrate 10, thereby avoiding the risk that the setting of the first groove G1 affects the mechanical connection strength and electrical connection stability between the light emitting element 20 and the electrode block 120.

[0109] When the light-emitting element 20 is in the shape of a strip, the width of the light-emitting element 20 is the distance between two sides of the light-emitting element 20 whose lengths are significantly longer than other dimensions, and the width of the first groove G1 is the distance between the two ends of the first groove G1 connected to the first side surface 120a or the second side surface 120b.

[0110] In some embodiments, the depth of the first groove G1 does not exceed half of the spacing between the first side surface 120 a and the second side surface 120 b of the electrode block 120 .

[0111] In these embodiments, the risk of reducing the mechanical structural strength of the electrode 12 block and weakening the electrical connection effect caused by the provision of the first groove G1 can be avoided.

[0112] The depth of the first groove G1 is the distance between the end of the first groove G1 farthest from the first side surface 120a or the second side surface 120b and the first side surface 120a or the second side surface 120b.

[0113] At the location where the first groove G1 is set, the actual size of the electrode block 120 becomes the difference between the spacing between the first side 120a and the second side 120b and the depth of the first groove G1. The deeper the depth of the first groove G1, the lower the mechanical structure strength of the electrode block 120 itself, and the smaller the area of ​​the overlapping area LA, the greater the overlapping resistance, affecting the electrical connection effect. Therefore, controlling the depth of the first groove G1 to no more than half of the spacing between the first side 120a and the second side 120b can avoid the risk of reducing the mechanical structure strength and electrical connection effect of the electrode block 120 due to the setting of the first groove G1.

[0114] See also Figure 2 In some embodiments, the overlapping area LA also includes a first overlapping edge 120c and a second overlapping edge 120d arranged between the first side surface 120a and the second side surface 120b, and the second stress release portion 102 also includes a second sub-portion 102b arranged along the first overlapping edge 120c and the second overlapping edge 120d.

[0115] In these embodiments, the second sub-portion 102b can release stress concentration at the first side surface 120a and the second side surface 120b, or the first overlapping edge 120c and the second overlapping edge 120d, and the display panel 100 can be applied to multi-angle repeated bending usage scenarios.

[0116] Fig. 9 Shows Figure 2 Cross-sectional structure along DD direction.

[0117] See also Fig. 9 In some embodiments, the second sub-portion 102 b is a second groove G2 that is recessed toward the substrate 10 , and the second sub-portion 102 b is staggered with the orthographic projection of the light emitting element 20 on the substrate 10 .

[0118] In these embodiments, the second sub-portion 102b is a second groove G2, which can concentrate stress at the second groove G2, and the first overlapping edge 120c and the second overlapping edge 120d are no longer stress peak positions, so that the stress in the overlapping area LA is distributed as evenly as possible, thereby releasing the stress concentration at the first overlapping edge 120c and the second overlapping edge 120d.

[0119] Therefore, the second groove G2 can also enable the display panel 100 to be repeatedly bent in the direction from the first overlapping edge 120c to the second overlapping edge 120d, thereby achieving repeated bending at multiple angles.

[0120] Preferably, the cross-sectional shape of the second groove G2 along the thickness direction of the electrode block 120 is an elliptical arc, and the internal stress of the second groove G2 is relatively evenly distributed while taking into account the advantage of simple processing technology.

[0121] Preferably, the elliptical arc shape of the second groove G2 is bilaterally symmetrical, further enabling uniform stress distribution.

[0122] Fig.10 Shows Figure 1 Another enlarged structure of area A in the middle.

[0123] See also Fig.10 In some embodiments, the second sub-portion 102 b is a through hole H0 that penetrates the electrode block 120 along the thickness direction of the electrode block 120 , and the second sub-portion 102 b partially overlaps with the orthographic projection of the light emitting element 20 on the substrate 10 .

[0124] In these embodiments, the second sub-portion 102b is a through hole H0, which can concentrate stress on the first overlapping edge 120c and the second overlapping edge 120d. The first side 120a and the second side 120b are no longer the stress peak positions, so that the stress in the overlapping area LA is distributed as evenly as possible, thereby releasing the stress concentration on the first side 120a and the second side 120b.

[0125] At the same time, the through hole H0 also penetrates to the side of the electrode block 120 away from the light emitting element 20 , so that the stress of the electrode block 120 on the substrate 10 side is concentrated at the position of the through hole H0 , thereby alleviating the stress concentration around the electrode block 120 .

[0126] Optionally, the second sub-portion 102b is a blind hole, which can only release the stress concentration on the first side surface 120a and the second side surface 120b.

[0127] Preferably, the orthographic projection of the through hole H0 on the substrate 10 is an elliptical arc, and the stress inside the through hole H0 is relatively evenly distributed while taking into account the advantage of simple processing technology.

[0128] Preferably, the elliptical arc shape of the through hole H0 is bilaterally symmetrical, further enabling uniform stress distribution.

[0129] Fig.11 Shows Figure 1 Another enlarged structure of area A in the middle.

[0130] See also Fig.11In some embodiments, the counter electrode 12 includes a first electrode block 121 and a second electrode block 122 arranged along a first direction X in a preset area, the light emitting element 20 is arranged along the first direction X and overlaps with the first electrode block 121 and the second electrode block 122 in sequence, and the overlapping area LA extends at least to two third side surfaces 120e adjacent to the first electrode block 121 and the second electrode block 122;

[0131] The second stress release portion 102 includes a first sub-portion 102 a disposed on two third side surfaces 120 e , and the orthographic projection of the light emitting element 20 on the substrate 10 covers the first sub-portion 102 a .

[0132] In these embodiments, the first sub-portion 102a is disposed at two third side surfaces 120e adjacent to the first electrode block 121 and the second electrode block 122, so that stress is concentrated at the position of the first sub-portion 102a, and stress in the overlapping area LA is distributed as evenly as possible, thereby alleviating stress concentration at other edges of the overlapping area LA between the light-emitting element 20 and the first electrode block 121 and the second electrode block 122.

[0133] See also Fig.11 In some embodiments, the first sub-portions 102a disposed on the two third side surfaces 120e are adjacent to each other and aligned along the first direction X.

[0134] In these embodiments, the first sub-portions 102a are aligned along the first direction X, so that the stress distribution of the overlapping area LA located at the first electrode block 121 and the overlapping area LA located at the second electrode block 122 can be kept consistent, thereby maintaining uniform stress distribution in the entire overlapping area LA.

[0135] Fig.12 Shows Figure 1 Another enlarged structure of area A in the middle.

[0136] See also Fig.12 In some embodiments, the first stress release portion 101 is disposed around each electrode in the counter electrode 12 and is recessed in a direction away from the counter electrode 12 to form a third groove G3.

[0137] In these embodiments, the third groove G3 can concentrate stress at the third groove G3, and the peripheral sides of each electrode in the electrode 12 are no longer the stress peak positions, so that the stress on the contact surface between each electrode of the electrode 12 and the array circuit layer 11 is distributed as evenly as possible, thereby releasing the stress concentration on the peripheral sides of each electrode in the electrode 12.

[0138] See also Fig.12 In some embodiments, the distance between the third groove G3 and each electrode in the counter electrode 12 is smaller than the width of the third groove G3.

[0139] In these embodiments, the width of the third groove G3 is the distance between the two ends of the third groove G3 connected to the surface of the substrate 10. The third groove G3 is distributed near the peripheral side of each electrode in the counter electrode 12, and can act on and change the stress distribution of the peripheral side of each electrode in the counter electrode 12, thereby effectively alleviating the stress concentration of the peripheral side of each electrode in the counter electrode 12.

[0140] Optionally, the depth of the third groove G3 is less than half the size of the overlapping area LA to avoid forming a deeper area on the panel between the electrodes of the electrode 12, so as to avoid affecting the mechanical connection strength and electrical connection effect of the electrode 12 and the light-emitting element 20.

[0141] Optionally, the length of the orthographic projection of the third groove G3 on the substrate 10 does not exceed 90% of the size of the overlapping area LA, so as to further avoid affecting the mechanical connection strength and electrical connection effect of the electrode 12 and the light emitting element 20 .

[0142] See also Fig.12 In some embodiments, the orthographic projection of the first stress release portion 101 on the substrate 10 is a closed figure.

[0143] In these embodiments, the first stress release portion 101 can release the stress concentration on the entire circumference of each electrode in the electrodes 12 .

[0144] See also Fig.12 In some embodiments, the orthographic projection of the first stress release portion 101 on the substrate 10 is a rounded rectangular frame.

[0145] In these embodiments, the first stress release portion 101 is connected at the intersections of different first stress release portions 101 on the circumferential sides of each electrode in the electrode 12 in different directions, and the intersections are chamfered to make the stress inside the first stress release portion 101 as evenly distributed as possible, thereby changing the stress distribution on the contact surface between each electrode in the electrode 12 and the array circuit layer 11, and further releasing the stress concentration on the circumferential side of each electrode in the electrode 12.

[0146] See also Figure 3 In some embodiments, the cross-sectional shape of the third groove G3 along the thickness direction of the substrate 10 is an elliptical arc.

[0147] In these embodiments, the stress inside the third groove G3 is relatively evenly distributed while taking into account the advantage of simple processing technology.

[0148] Preferably, the elliptical arc shape of the third groove G3 is bilaterally symmetrical, further enabling uniform stress distribution.

[0149] Fig.13 Shows Figure 2Another cross-sectional structure along the BB direction.

[0150] See also Fig.13 In some embodiments, the substrate 10 further includes a covering layer 13 , the covering layer 13 includes a through groove 131 , the array line layer 11 further includes an exposed portion 111 exposed by the through groove 131 , and the through groove 131 and the exposed portion 111 are combined to form a first stress release portion 101 .

[0151] In these embodiments, the through groove 131 is obtained by exposing and developing the cover layer 13 , and the array circuit layer 11 is exposed through the through groove 131 to form the first stress release portion 101 . The manufacturing process is simpler and the implementation process is less difficult.

[0152] By converting the subtractive process design on the substrate 10 already provided with the array circuit layer 11 into an additive process design, and then performing exposure and development treatment on the newly added cover layer 13, the process is less difficult to implement.

[0153] Fig.14 The structure of a display device 1000 provided in an embodiment of the second aspect of the present application is shown.

[0154] See also Fig.14 In a second aspect, an embodiment of the present application provides a display device 1000, comprising the display panel 100 described in any one of the first aspect embodiments of the present application.

[0155] The display device 1000 provided in the second aspect embodiment of the present application includes the display panel 100 described in any one of the first aspect embodiments of the present application, and therefore has the beneficial effects of the display panel 100 in any one of the first aspect embodiments of the present application, which will not be described in detail herein.

[0156] The display device 1000 in the embodiment of the second aspect of the present application includes but is not limited to mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, consoles and other devices with display functions.

[0157] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that: include: A substrate, comprising an array circuit layer and a counter electrode, wherein the counter electrode is disposed on one side of the array circuit layer and distributed in an array, the substrate further comprising a first stress release portion, and the counter electrode further comprising a second stress release portion; A light emitting element, wherein the light emitting element is arranged on a side of the counter electrode facing away from the array circuit layer; The first stress release portion is distributed along at least a portion of the circumference of each electrode in the pair of electrodes, the pair of electrodes overlaps with the light-emitting element to form an overlapping area, and the second stress release portion is arranged along at least a portion of the edge of the overlapping area.

2. The display panel according to claim 1, characterized in that: The pair of electrodes has two electrode blocks that are opposite to each other and spaced apart in a first direction, each of the electrode blocks includes a first side surface and a second side surface that are opposite to each other in the first direction, and the overlapping region extends from the first side surface to the second side surface; The second stress release portion includes a first sub-portion disposed on at least one of the first side surface and the second side surface, and the orthographic projection of the light emitting element on the substrate covers the first sub-portion.

3. The display panel according to claim 2, characterized in that: The second stress relief portion includes a plurality of the first sub-portions.

4. The display panel according to claim 3, characterized in that: The sizes of the plurality of first sub-portions disposed on the first side surface or the second side surface gradually decrease from the center to both sides.

5. The display panel according to claim 3, characterized in that: The first sub-portion disposed on the first side surface is aligned with the first sub-portion disposed on the second side surface.

6. The display panel according to claim 2, characterized in that: The first sub-portion is disposed on the first side surface, and the first stress release portion is disposed along the second side surface.

7. The display panel according to any one of claims 2 to 6, characterized in that: The first sub-portion is a first groove formed by being recessed in a direction from the first side surface to the second side surface or in a direction from the second side surface to the first side surface.

8. The display panel according to claim 7, characterized in that: The first groove penetrates the electrode block along a thickness direction of the electrode block.

9. The display panel according to claim 8, characterized in that: The orthographic projection of the first groove on the substrate is an elliptical arc.

10. The display panel according to claim 7, characterized in that: The light emitting element is in the shape of an elongated strip, and the width of the first groove does not exceed the width of the light emitting element.

11. The display panel according to claim 7, characterized in that: A depth of the first groove does not exceed half of a distance between the first side surface and the second side surface of the electrode block.

12. The display panel according to claim 2, characterized in that: The overlapping region further includes a first overlapping edge and a second overlapping edge disposed between the first side surface and the second side surface, and the second stress release portion further includes a second sub-portion disposed along the first overlapping edge and the second overlapping edge.

13. The display panel according to claim 12, characterized in that: The second sub-portion is a second groove that is recessed toward the substrate, and the second sub-portion is staggered with the orthographic projection of the light emitting element on the substrate.

14. The display panel according to claim 12, characterized in that: The second sub-portion is a through hole penetrating the electrode block along a thickness direction of the electrode block, and the second sub-portion partially overlaps with an orthographic projection of the light emitting element on the substrate.

15. The display panel according to claim 1, characterized in that: The counter electrode includes a first electrode block and a second electrode block arranged along a first direction in a preset area, the light-emitting element is arranged along the first direction and overlaps with the first electrode block and the second electrode block in sequence, and the overlapping area extends to at least two third side surfaces adjacent to the first electrode block and the second electrode block; The second stress release portion includes a first sub-portion disposed on the two third side surfaces, and the orthographic projection of the light emitting element on the substrate covers the first sub-portion.

16. The display panel according to claim 15, characterized in that: The first sub-portions disposed on the two third side surfaces are adjacent to each other and aligned along the first direction.

17. The display panel according to claim 1, characterized in that: The first stress release portion is arranged around each electrode of the pair of electrodes and is recessed in a direction away from the pair of electrodes to form a third groove.

18. The display panel according to claim 17, characterized in that: The distance between the third groove and each electrode in the pair of electrodes is smaller than the width of the third groove.

19. The display panel according to claim 17, characterized in that: The orthographic projection of the first stress release portion on the substrate is a closed figure.

20. The display panel according to claim 19, characterized in that: The orthographic projection of the first stress release portion on the substrate is a rounded rectangular frame.

21. The display panel according to claim 17, characterized in that: The cross-sectional shape of the third groove along the thickness direction of the substrate is an elliptical arc.

22. The display panel according to claim 1, characterized in that: The substrate further includes a covering layer, the covering layer includes a through groove, the array line layer further includes an exposed portion exposed by the through groove, and the through groove and the exposed portion are combined to form the first stress release portion.

23. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 22.

Images