Stretchable display panel and display device

Abstract

The invention relates to a stretchable display panel and a display device. The stretchable display panel includes: a substrate; the plurality of pixel islands are arranged on the substrate at intervals; each pixel island is provided with a light-emitting area and a non-light-emitting area adjacent to the light-emitting area; the pixel island comprises a driving layer group which is arranged on the substrate; the pixel limiting structure is arranged on the driving layer group; the pixel limiting structure defines a pixel opening located in the light-emitting area; at least one groove located in the non-light-emitting area is further formed in the side, away from the driving layer set, of the pixel limiting structure, and the groove penetrates through the pixel limiting structure and part of the driving layer set in the thickness direction of the substrate. The light-emitting units are arranged in the pixel openings; and the packaging layer covers one side, deviating from the substrate, of the light-emitting unit and the groove wall of the groove. The packaging reliability of the packaging layer can be improved, and the service life of the stretchable display panel can be prolonged.

Description

Technical Field

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

[0002] In recent years, stretchable organic light emitting diode (OLED) display panels have attracted much attention and development in the display industry due to their unique display form. At present, stretchable OLED display panels can initially achieve a stretching rate of 10%. However, stretchable OLED display panels currently have the problem of poor packaging reliability. Summary of the invention

[0003] Based on this, it is necessary to provide a stretchable display panel and a display device that can improve packaging reliability.

[0004] In a first aspect, an embodiment of the present application provides a stretchable display panel, comprising:

[0005] substrate;

[0006] A plurality of pixel islands are arranged on the substrate at intervals; the pixel islands have a light-emitting area and a non-light-emitting area adjacent to the light-emitting area; the pixel islands include:

[0007] A driving layer group, disposed on the substrate;

[0008] A pixel defining structure is provided on the driving layer group; the pixel defining structure defines a pixel opening located in the light-emitting area; the pixel defining structure is further provided with at least one groove located in the non-light-emitting area on a side away from the driving layer group, the groove passing through the pixel defining structure and a part of the driving layer group along the thickness direction of the substrate;

[0009] a light emitting unit, disposed in the pixel opening; and

[0010] The packaging layer covers a side of the light emitting unit away from the substrate and a groove wall of the groove.

[0011] The above-mentioned stretchable display panel, by setting a groove located in the non-luminous area on the pixel defining structure, and making the groove pass through the pixel defining structure and part of the driving layer group, further extending the encapsulation layer to cover the groove wall of the groove. In this way, on the one hand, the groove can slow down the tendency of the crack to extend toward the luminous area, and on the other hand, the groove can increase the contact area of ​​the encapsulation layer, thereby improving the encapsulation reliability of the encapsulation layer as a whole, and then improving the service life of the stretchable display panel.

[0012] In one embodiment, the driving layer group includes an inorganic film layer and an organic film layer, and the inorganic film layer is disposed between the substrate and the organic film layer;

[0013] The groove at least penetrates the organic film layer to expose a portion of the inorganic film layer; the encapsulation layer covers the exposed surface of the inorganic film layer;

[0014] Optionally, the groove runs through a portion of the inorganic film layer;

[0015] Optionally, the driving layer group includes an interlayer insulating layer and a planarization layer, the interlayer insulating layer is located between the substrate and the planarization layer, the interlayer insulating layer is the inorganic film layer, the planarization layer is the organic film layer, and the groove passes through the planarization layer and a portion of the interlayer insulating layer.

[0016] In one embodiment, the stretchable display panel further includes a connecting line, wherein the connecting line connects adjacent pixel islands; the driving layer group includes a routing line, wherein the routing line is electrically connected to the connecting line;

[0017] Optionally, the routing includes a first routing portion and a second routing portion, one end of the second routing portion is electrically connected to the first routing portion, and the other end is electrically connected to the connecting wire; the first routing portion and the second routing portion are arranged in different layers;

[0018] Optionally, the first routing portion is located between the interlayer insulating layer and the planarization layer;

[0019] Optionally, the driving layer group further includes a gate insulating layer and a capacitor insulating layer, the gate insulating layer and the capacitor insulating layer are located between the substrate and the interlayer insulating layer, and the gate insulating layer is located between the substrate and the capacitor insulating layer;

[0020] The second wiring portion is located between the gate insulating layer and the capacitor insulating layer;

[0021] Optionally, the driving layer group further includes a gate, the gate is located between the gate insulating layer and the capacitor insulating layer, and the second wiring portion is arranged in the same layer as the gate;

[0022] Optionally, a partial orthographic projection of the second wiring portion on the substrate coincides with an orthographic projection of the groove on the substrate;

[0023] Optionally, the first wiring portion and the second wiring portion are electrically connected through a first via structure;

[0024] Optionally, a partial orthographic projection of the first wiring portion on the substrate coincides with an orthographic projection of the second wiring portion on the substrate;

[0025] Optionally, the routing line further includes a third routing line portion, the third routing line portion is electrically connected to the second routing line portion and the connecting line; the third routing line portion and the second routing line portion are arranged in different layers;

[0026] Optionally, the third routing portion is arranged on the same layer as the first routing portion;

[0027] Optionally, the third routing portion and the second routing portion are electrically connected through a second via structure;

[0028] Optionally, a partial orthographic projection of the third routing portion on the substrate coincides with an orthographic projection of the second routing portion on the substrate.

[0029] In one of the embodiments, the orthographic projection of the encapsulation layer on the pixel defining structure covers the groove;

[0030] Optionally, a plurality of grooves are provided on the pixel defining structure, the plurality of grooves are arranged at intervals in the non-luminous area, and the encapsulation layer covers groove walls of the plurality of grooves;

[0031] Optionally, the non-luminous area is arranged around the periphery of the luminous area, and the groove is arranged around the periphery of the luminous area;

[0032] Optionally, the orthographic projection of the groove on the substrate is a closed ring-shaped figure;

[0033] Optionally, the groove includes a plurality of first groove sections, and the plurality of first groove sections are arranged at intervals around the periphery of the light-emitting area;

[0034] Optionally, in two adjacent grooves, each of the grooves includes a plurality of the first groove segments; in the same groove, there is a gap between two adjacent first groove segments; in two adjacent grooves, the gap of one groove is opposite to the first groove segment of the other groove;

[0035] Optionally, the groove includes a first main groove and a plurality of first sub-grooves; the orthographic projection of the first main groove on the substrate is a closed ring-shaped figure, and the first main groove is arranged around the periphery of the light-emitting area; the plurality of first sub-grooves are arranged around the periphery of the light-emitting area at intervals, and a part of the orthographic projection of the first sub-groove on the substrate coincides with the orthographic projection of the first main groove on the driving layer group;

[0036] Optionally, the first sub-groove has a first end and a second end that are oppositely disposed, the first end is located at a side of the first main groove close to the light-emitting area, and the second end is located at a side of the first main groove away from the non-light-emitting area.

[0037] Optionally, a dimension of an orthographic projection of the groove on the substrate along a first direction is a first width W1, a distance between two adjacent grooves is a first spacing L1, and the first width W1 is greater than or equal to the first spacing L1;

[0038] The first direction is perpendicular to the thickness direction of the substrate, and perpendicular to the length direction of the orthographic projection of the groove on the substrate.

[0039] In one embodiment, the driving layer group includes a main body and an edge portion connected to the main body; the pixel defining structure and the light emitting unit are both arranged on the main body;

[0040] At least one protective structure is disposed on the edge portion, the protective structure has at least one concave portion, and the encapsulation layer also covers the wall surface of the concave portion;

[0041] Optionally, along the thickness direction of the substrate, the size of the main body portion is greater than the size of the edge portion;

[0042] Optionally, the encapsulation layer also covers the side surface of the pixel defining structure and the side surface of the main body;

[0043] Optionally, the edge portion is disposed around the periphery of the main body portion, and the protective structure is disposed around the periphery of the main body portion;

[0044] Optionally, a plurality of protective structures arranged at intervals are provided on the edge portion, and the encapsulation layer covers a recess of each of the protective structures;

[0045] Optionally, among two adjacent protective structures, one protective structure is arranged around the periphery of the main body, and the other protective structure is arranged around the periphery of the one protective structure.

[0046] Optionally, the protective structure includes a plurality of substructures, and the plurality of substructures are arranged at intervals around the periphery of the main body;

[0047] Optionally, in two adjacent protective structures, each of the protective structures includes a plurality of substructures, and in the same protective structure, there is a gap between two adjacent substructures; in two adjacent protective structures, the gap of one protective structure is opposite to the substructure of the other protective structure;

[0048] Optionally, a dimension of an orthographic projection of the protective structure on the substrate along the first direction is a second width W2, a distance between two adjacent protective structures is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2;

[0049] The first direction is perpendicular to the thickness direction of the substrate and perpendicular to the length direction of the protection structure.

[0050] In one embodiment, the protective structure has a plurality of recesses, and the encapsulation layer covers the walls of the plurality of recesses;

[0051] Optionally, the protective structure has two recesses, and the openings of the two recesses are opposite to each other;

[0052] Optionally, the protective structure comprises a first sub-section and a second sub-section which are sequentially stacked on the edge portion, and opposite ends of the second sub-section along a first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate;

[0053] The first sub-portion, the protruding portion of the second sub-portion, and the edge portion define the recess;

[0054] Optionally, the protective structure comprises a third sub-section, a first sub-section and a second sub-section which are sequentially stacked on the edge portion; opposite ends of the third sub-section along a first direction protrude from a side wall of the first sub-section; opposite ends of the second sub-section along the first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate;

[0055] The protruding portion of the third section, the protruding portions of the first section, and the second section define the recess;

[0056] Optionally, the material of the third section is the same as that of the second section;

[0057] Optionally, the material of the third section is different from that of the first section;

[0058] Optionally, the material of the third section includes titanium, and the material of the first section includes aluminum.

[0059] In a second aspect, an embodiment of the present application provides another stretchable display panel, comprising:

[0060] substrate; and

[0061] A plurality of pixel islands are arranged on the substrate at intervals; the pixel islands have a light-emitting area and a non-light-emitting area adjacent to the light-emitting area; the pixel islands include:

[0062] A driving layer group, disposed on the substrate;

[0063] A light-emitting unit, disposed on the driving layer group and located in the light-emitting area;

[0064] an encapsulation auxiliary structure, disposed on the driving layer group and located in the non-luminescent area; at least one groove is disposed on a side of the encapsulation auxiliary structure away from the driving layer group; the encapsulation auxiliary structure comprises an inorganic material; and

[0065] The packaging layer covers a side of the light emitting unit away from the substrate and a groove wall of the groove.

[0066] The above-mentioned stretchable display panel, by arranging a packaging auxiliary structure on the driving layer group, and arranging a groove on the packaging auxiliary structure, so that the packaging layer extends to cover the groove wall of the groove. In this way, on the one hand, the groove can slow down the tendency of the crack to extend toward the light-emitting area, and on the other hand, the groove can increase the contact area of ​​the packaging layer and improve the packaging performance of the packaging layer. On the other hand, the packaging layer is in direct contact with the groove of the inorganic material, which can improve the film adhesion of the packaging layer, thereby further improving the packaging performance of the packaging layer, and then improving the packaging reliability of the packaging layer as a whole, and improving the service life of the stretchable display panel.

[0067] In one embodiment, a plurality of grooves arranged at intervals are provided on a side of the encapsulation auxiliary structure away from the driving layer group, and the encapsulation layer covers the groove walls of the plurality of grooves;

[0068] Optionally, the orthographic projection of the encapsulation layer on the substrate covers the orthographic projection of the groove on the substrate;

[0069] Optionally, the encapsulation auxiliary structure is disposed around the periphery of the light-emitting area, and the groove is disposed around the periphery of the light-emitting area;

[0070] Optionally, the orthographic projection of the groove on the substrate is a closed ring-shaped figure;

[0071] Optionally, the groove includes a plurality of second groove segments, and the plurality of second groove segments are arranged at intervals around the periphery of the light-emitting area;

[0072] Optionally, in two adjacent grooves, each groove includes a plurality of second groove segments; in the same groove, there is a gap between two adjacent second groove segments; in two adjacent grooves, the gap of one groove is opposite to the second groove segment of the other groove;

[0073] Optionally, the groove includes a second main groove and a plurality of second sub-grooves; the orthographic projection of the second main groove on the substrate is a closed ring-shaped figure, and the second main groove is arranged around the periphery of the light-emitting area; the plurality of second sub-grooves are arranged around the periphery of the light-emitting area at intervals, and a part of the orthographic projection of the second sub-grooves on the substrate coincides with the orthographic projection of the second main groove on the substrate;

[0074] Optionally, the second sub-groove has a third end and a fourth end that are oppositely arranged, the third end is located at a side of the second main groove close to the light-emitting area, and the fourth end is located at a side of the second main groove away from the non-light-emitting area.

[0075] Optionally, a dimension of an orthographic projection of the groove on the substrate along the first direction is a third width W3, a distance between two adjacent grooves is a third spacing L3, and the third width W3 is greater than or equal to the third spacing L3;

[0076] The first direction is perpendicular to the thickness direction of the substrate and perpendicular to the length direction of the orthographic projection of the groove on the substrate.

[0077] In one embodiment, at least one protrusion is provided on one side of the auxiliary packaging structure close to the driving layer group, and at least one recess is provided on one side of the driving layer group close to the auxiliary packaging structure, and the at least one protrusion is embedded in the at least one recess;

[0078] Optionally, a side of the auxiliary packaging structure close to the driving layer group is provided with a plurality of convex parts arranged at intervals, and a side of the driving layer group close to the auxiliary packaging structure is provided with a plurality of concave parts, and the plurality of convex parts and the plurality of concave parts are embedded in a one-to-one correspondence;

[0079] Optionally, a plurality of grooves arranged at intervals are provided on the packaging auxiliary structure, and an orthographic projection of one of the grooves on the driving layer group coincides with an orthographic projection of one of the protrusions on the driving layer group;

[0080] Optionally, the plurality of grooves correspond to the plurality of protrusions one by one, and an orthographic projection of each groove on the driving layer group coincides with an orthographic projection of a corresponding protrusion on the driving layer group;

[0081] Optionally, the driving layer group includes a planarization layer, and the recessed portion is arranged on a surface of the planarization layer on a side away from the substrate;

[0082] Optionally, along the thickness direction of the substrate, the size of the recessed portion is H1, the size of the planarization layer is H2, and H1 and H2 satisfy the relationship: H1≤0.5H2.

[0083] In one of the embodiments, a surface of one side of the packaging auxiliary structure close to the driving layer group is a plane;

[0084] Optionally, the stretchable display panel comprises a pixel defining structure, the pixel defining structure is arranged on the driving layer group, and the pixel defining structure defines a pixel opening located in the light emitting area; the light emitting unit is arranged in the pixel opening;

[0085] A surface of one side of the pixel defining structure close to the driving layer group is flush with a surface of one side of the encapsulation auxiliary structure close to the driving layer group;

[0086] Optionally, the pixel defining structure is adjacent to the encapsulation auxiliary structure.

[0087] In one embodiment, the driving layer group includes a main body and an edge portion connected to the main body; the light emitting unit is disposed on the main body;

[0088] At least one protective structure is disposed on the edge portion, the protective structure has at least one concave portion, and the encapsulation layer also covers the wall surface of the concave portion;

[0089] Optionally, along the thickness direction of the substrate, the size of the main body portion is greater than the size of the edge portion;

[0090] Optionally, the stretchable display panel includes a pixel defining structure, the pixel defining structure is disposed on the main body, and the pixel defining structure defines a pixel opening located in the light-emitting area; the light-emitting unit is disposed in the pixel opening; the encapsulation layer further covers a side surface of the pixel defining structure and a side surface of the main body;

[0091] Optionally, the edge portion is disposed around the periphery of the main body portion, and the protective structure is disposed around the periphery of the main body portion;

[0092] Optionally, a plurality of protective structures arranged at intervals are provided on the edge portion, and the encapsulation layer covers a recess of each of the protective structures;

[0093] Optionally, among two adjacent protective structures, one protective structure is arranged around the periphery of the main body, and the other protective structure is arranged around the periphery of the one protective structure.

[0094] Optionally, the protective structure includes a plurality of substructures, and the plurality of substructures are arranged at intervals around the periphery of the main body;

[0095] Optionally, in two adjacent protective structures, each of the protective structures includes a plurality of substructures, and in the same protective structure, there is a gap between two adjacent substructures; in two adjacent protective structures, the gap of one protective structure is opposite to the substructure of the other protective structure;

[0096] Optionally, a dimension of an orthographic projection of the protective structure on the substrate along the first direction is a second width W2, a distance between two adjacent protective structures is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2;

[0097] The first direction is perpendicular to the thickness direction of the substrate and perpendicular to the length direction of the protection structure.

[0098] In one embodiment, the protective structure has a plurality of recesses, and the encapsulation layer covers the walls of the plurality of recesses;

[0099] Optionally, the protective structure has two recesses, and the openings of the two recesses are opposite to each other;

[0100] Optionally, the protective structure comprises a first sub-section and a second sub-section which are sequentially stacked on the edge portion, and opposite ends of the second sub-section along a first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate;

[0101] The first sub-portion, the protruding portion of the second sub-portion, and the edge portion define the recess;

[0102] Optionally, the protective structure comprises a third sub-section, a first sub-section and a second sub-section which are sequentially stacked on the edge portion; opposite ends of the third sub-section along a first direction protrude from a side wall of the first sub-section; opposite ends of the second sub-section along the first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate;

[0103] The protruding portion of the third section, the protruding portions of the first section, and the second section define the recess;

[0104] Optionally, the material of the third section is the same as that of the second section;

[0105] Optionally, the material of the third section is different from that of the first section;

[0106] Optionally, the material of the third section includes titanium, and the material of the first section includes aluminum.

[0107] In a third aspect, an embodiment of the present application provides another stretchable display panel, comprising:

[0108] substrate; and

[0109] A plurality of pixel islands are arranged on the substrate at intervals;

[0110] The pixel island comprises:

[0111] A driving layer group, disposed on the substrate, the driving layer group comprising a main body and an edge portion connected to the main body;

[0112] A light emitting unit, disposed on the main body;

[0113] A protective structure, disposed on the edge portion, and having at least one recessed portion;

[0114] The encapsulation layer covers a side of the light emitting unit away from the substrate and a wall surface of the concave portion.

[0115] The above-mentioned stretchable display panel, by arranging a protective structure on the edge portion and arranging a recess on the protective structure, allows the encapsulation layer to extend and cover the wall surface of the recess. In this way, on the one hand, the recess can slow down the tendency of cracks to expand toward the main body, and on the other hand, the recess can increase the contact area of ​​the encapsulation layer, thereby improving the encapsulation reliability of the encapsulation layer as a whole, and further improving the service life of the stretchable display panel.

[0116] In one embodiment, along the thickness direction of the substrate, the size of the main body portion is greater than the size of the edge portion;

[0117] Optionally, the stretchable display panel includes a pixel defining structure, the pixel defining structure is disposed on the main body, the pixel defining structure defines a pixel opening located in the light emitting area, and the light emitting unit is disposed in the pixel opening; the encapsulation layer further covers a side surface of the pixel defining structure and a side surface of the main body;

[0118] Optionally, the edge portion is disposed around the periphery of the main body portion, and the protective structure is disposed around the periphery of the main body portion;

[0119] Optionally, a plurality of protective structures arranged at intervals are provided on the edge portion, and the encapsulation layer covers a recess of each of the protective structures;

[0120] Optionally, among two adjacent protective structures, one protective structure is arranged around the periphery of the main body, and the other protective structure is arranged around the periphery of the one protective structure.

[0121] Optionally, the protective structure includes a plurality of substructures, and the plurality of substructures are arranged at intervals around the periphery of the main body;

[0122] Optionally, in two adjacent protective structures, each of the protective structures includes a plurality of substructures, and in the same protective structure, there is a gap between two adjacent substructures; in two adjacent protective structures, the gap of one protective structure is opposite to the substructure of the other protective structure;

[0123] Optionally, a dimension of an orthographic projection of the protective structure on the substrate along the first direction is a second width W2, a distance between two adjacent protective structures is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2;

[0124] The first direction is perpendicular to the thickness direction of the substrate and perpendicular to the length direction of the protection structure.

[0125] In one embodiment, the protective structure has a plurality of recesses, and the encapsulation layer covers the walls of the plurality of recesses;

[0126] The protective structure has two recesses, and the openings of the two recesses are opposite to each other;

[0127] Optionally, the protective structure comprises a first sub-section and a second sub-section which are sequentially stacked on the edge portion, and opposite ends of the second sub-section along a first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate;

[0128] The first sub-portion, the protruding portion of the second sub-portion, and the edge portion define the recess;

[0129] Optionally, the protective structure comprises a third sub-section, a first sub-section and a second sub-section which are sequentially stacked on the edge portion; opposite ends of the third sub-section along a first direction protrude from a side wall of the first sub-section; opposite ends of the second sub-section along the first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate;

[0130] The protruding portion of the third section, the protruding portions of the first section, and the second section define the recess;

[0131] Optionally, the material of the third section is the same as that of the second section;

[0132] Optionally, the material of the third section is different from that of the first section;

[0133] Optionally, the material of the third section includes titanium, and the material of the first section includes aluminum.

[0134] In one embodiment, the driving layer group includes a substrate and a functional layer group disposed on the substrate; the substrate is provided with the main body portion and the edge portion; the encapsulation layer also covers the side surface of the functional layer group;

[0135] Optionally, the functional layer group includes a barrier layer and a buffer layer which are stacked, and the barrier layer is located between the substrate and the buffer layer; the encapsulation layer also covers the side surfaces of the barrier layer and the buffer layer;

[0136] Optionally, the functional layer group further includes a gate insulating layer disposed on a side of the buffer layer away from the substrate, and the encapsulation layer further covers a side surface of the gate insulating layer;

[0137] Optionally, the functional layer group further includes a capacitor insulating layer disposed on a side of the gate insulating layer away from the substrate, and the encapsulation layer further covers a side surface of the capacitor insulating layer;

[0138] Optionally, the functional layer group further includes an interlayer insulating layer disposed on a side of the capacitor insulating layer away from the substrate, and the encapsulation layer further covers a side surface of the interlayer insulating layer;

[0139] Optionally, the functional layer group further includes a planarization layer disposed on a side of the interlayer insulating layer away from the substrate, and the encapsulation layer also covers a side surface of the planarization layer.

[0140] In a fourth aspect, an embodiment of the present application provides a display device, comprising the stretchable display panel in any embodiment of the first aspect, the second aspect or the third aspect.

[0141] The above display device can, on the one hand, slow down the tendency of cracks to extend toward the light-emitting unit, and on the other hand, increase the contact area of ​​the encapsulation layer, thereby improving the encapsulation reliability as a whole and further increasing the service life of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0142] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0143] Figure 1 A partial top view schematic diagram of a display panel provided in an embodiment of the present application.

[0144] Figure 2 for Figure 1 A schematic diagram of a cross-sectional structure of a display panel is shown.

[0145] Figure 3 for Figure 1 A schematic diagram of an arrangement of grooves of a display panel is shown.

[0146] Figure 4 for Figure 1 Another schematic diagram of the arrangement of the grooves of the display panel is shown.

[0147] Figure 5 for Figure 1 A schematic diagram of another arrangement of the grooves of the display panel is shown.

[0148] Figure 6 for Figure 1 A schematic diagram of another arrangement of the grooves of the display panel is shown.

[0149] Figure 7 for Figure 1 A schematic diagram of the arrangement of the protection structure of the display panel is shown.

[0150] Figure 8 for Figure 1 Another schematic diagram of the arrangement of the protection structure of the display panel is shown.

[0151] Fig. 9 for Figure 1 A schematic diagram of a cross-sectional structure of a protective structure and an edge portion of a display panel is shown.

[0152] Fig.10 for Figure 1 A schematic diagram of another cross-sectional structure of the protective structure and edge portion of the display panel is shown.

[0153] Fig.11 for Figure 1 A schematic diagram of another cross-sectional structure of the protection structure and edge portion of the display panel is shown.

[0154] Fig.12 for Figure 1 Another schematic diagram of the cross-sectional structure of the display panel is shown.

[0155] Fig.13 for Fig.12 A schematic diagram of a partial cross-sectional structure of a display panel is shown.

[0156] Fig.14 for Figure 1 A schematic diagram of another cross-sectional structure of a display panel is shown.

[0157] Description of reference numerals:

[0158] 100. Stretchable display panel; 1. substrate; 2. pixel island; 2a. light-emitting area; 2b. non-light-emitting area; 2b1. transition area; 2b2. packaging area; 21. driving layer group; 211. base; 2111. main body; 2112. edge; 212. interlayer insulating layer; 213. planarizing layer; 2131. recessed part; 214. routing; 2141. first routing part; 2142. second routing part; 2143. third routing part; 2144. first via structure; 2145. second via structure; 215. gate insulating layer; 216. capacitor insulating layer; 217. Blocking layer; 218, buffer layer; 219, gate; 22, pixel defining structure; 23, light-emitting unit; 231, first electrode; 232, light-emitting functional part; 233, second electrode; 24, encapsulation layer; 25, groove; 251, first groove section; 252, first main groove; 253, first sub-groove; 253a, first end; 253b, second end; 26, protective structure; 26a, recess; 26b, substructure; 261, first subsection; 262, second subsection; 263, third subsection; 27, encapsulation auxiliary structure; 271, groove; 272, raised part; 3, connecting line. DETAILED DESCRIPTION

[0159] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0160] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, they do not represent any order, quantity or importance, but are only used to distinguish different components. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present application, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0161] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0162] At present, flexible display panels have made great progress. Therefore, curved, foldable and stretchable display panels have broad development prospects in the fields of smart wearables and vehicles. In related stretchable display technologies, the adhesion between the encapsulation layer and the pixel definition layer or array layer group is poor, resulting in loose contact, making the encapsulation layer prone to cracks during etching, peeling and stretching tests, leading to pixel island failure.

[0163] In view of the above problems, embodiments of the present application provide a stretchable display panel and a display device capable of improving packaging reliability.

[0164] It can be understood that the stretchable display panel can be a stretchable organic light emitting diode display panel (Organic Light Emitting Diode, OLED), a stretchable quantum dot electroluminescent display panel (Quantum Dot Light Emitting Diodes, QLED), etc.

[0165] First, refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a stretchable display panel 100, which includes a substrate 1 and a plurality of pixel islands 2. The plurality of pixel islands 2 are arranged on the substrate 1 at intervals. The pixel island 2 has a light-emitting area 2a and a non-light-emitting area 2b adjacent to the light-emitting area 2a. Exemplarily, the substrate 1 is a flexible substrate with stretchability.

[0166] Specifically, the pixel island 2 includes a driving layer group 21, a pixel defining structure 22, a light-emitting unit 23 and an encapsulation layer 24. The driving layer group 21 is arranged on the substrate 1. The pixel defining structure 22 is arranged on the driving layer group 21. The pixel defining structure 22 defines a pixel opening located in the light-emitting area 2a. The side of the pixel defining structure 22 away from the driving layer group 21 is also provided with at least one groove 25 located in the non-light-emitting area 2b, and the groove 25 penetrates the pixel defining structure 22 and part of the driving layer group 21 along the thickness direction of the substrate 1. The light-emitting unit 23 is arranged in the pixel opening. The encapsulation layer 24 covers the side of the light-emitting unit 23 away from the substrate 1, and the groove wall of the groove 25.

[0167] In the embodiment of the present application, the encapsulation layer 24 is an inorganic encapsulation layer. The encapsulation layer 24 extends from the surface of the light-emitting unit 23 toward the non-light-emitting area 2b, and covers the exposed surface of the pixel defining structure 22 and the groove wall of the groove 25. It should be emphasized that: A covers one side of B, or A covers the surface (or wall) of B means that A is in direct contact with B.

[0168] It should be noted that the groove 25 penetrates the pixel defining structure 22 and part of the driving layer group 21 along the thickness direction of the substrate 1, that is, a part of the side wall of the groove 25 is located on the pixel defining structure 22, and the bottom wall and another part of the side wall of the groove 25 are located on the driving layer group 21. By making the groove 25 penetrate part of the driving layer group 21, the depth of the groove 25 can be increased, thereby increasing the surface area of ​​the groove wall of the groove 25, and because the encapsulation layer 24 covers the groove wall of the groove 25, the coverage area of ​​the encapsulation layer 24 is increased.

[0169] In the embodiment of the present application, the non-luminous area 2b includes a transition area 2b1 and an encapsulation area 2b2, and the transition area 2b1 is located between the encapsulation area 2b2 and the luminous area 2a. For example, the groove 25 can be provided in the encapsulation area 2b2. Further, the non-luminous area 2b is arranged around the periphery of the luminous area 2a.

[0170] It should be noted that the pixel defining structure 22 in the embodiment of the present application may be a pixel defining layer, or may be other structures for defining the position of the light emitting unit. The embodiment of the present application does not limit the specific composition of the pixel defining structure 22.

[0171] The stretchable display panel 100 provided in the embodiment of the present application is configured such that a groove 25 located in the non-luminous area 2b is provided on the pixel defining structure 22, and the groove 25 passes through the pixel defining structure 22 and a part of the driving layer group 21, so that the encapsulation layer 24 is further extended to cover the groove wall of the groove 25. In this way, on the one hand, when a crack is generated, the groove 25 can hinder the expansion of the crack to a certain extent, thereby slowing down the tendency of the crack to extend toward the luminous area 2a; on the other hand, the groove 25 can increase the contact area of ​​the encapsulation layer 24, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, thereby improving the service life of the stretchable display panel 100.

[0172] It can be understood that, in one example, the driving layer group 21 includes a substrate 211, and the driving layer group 21 is disposed on the substrate 1 through its own substrate 211. In another example, the driving layer group 21 does not include the substrate 211, that is, the driving layer group 21 is directly disposed on the substrate 1, in which case the substrate 1 may be provided with a stretching area and a pixel area, and the driving layer group 21 is disposed in the pixel area, and when stretched, the stretching area is stretched, and the pixel area is not stretchable.

[0173] It can be understood that the light-emitting unit 23 includes a first electrode 231, a light-emitting functional part 232, and a second electrode 233 stacked in a direction away from the substrate 1. The light-emitting functional part 232 includes at least a light-emitting layer (Emission layer, EML), and may also include a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole blocking layer (HBL) and an electron blocking layer (EBL) One or more. Alternatively, the light-emitting functional part 232 may also be a stacked light-emitting layer, that is, including at least two light-emitting layers and a charge generation layer (CGL) located between each adjacent light-emitting layer.

[0174] In one embodiment, the driving layer group 21 includes an inorganic film layer and an organic film layer, and the inorganic film layer is disposed between the substrate 1 and the organic film layer. The groove 25 at least penetrates the organic film layer to expose a portion of the inorganic film layer. The encapsulation layer 24 covers the exposed surface of the inorganic film layer.

[0175] By exposing part of the inorganic film layer, the exposed surface of the inorganic film layer can be used as the groove wall of the groove 25, that is, part of the groove wall of the groove 25 is made into an inorganic groove wall. In this way, the encapsulation layer 24 is in direct contact with the inorganic groove wall, which can improve the film adhesion of the encapsulation layer 24, thereby further improving the encapsulation performance of the encapsulation layer 24, and then improving the encapsulation reliability of the encapsulation layer 24 as a whole, and improving the service life of the stretchable display panel 100.

[0176] In one example, the groove 25 only penetrates the organic film layer, and the bottom of the groove 25 ends at the top surface of the inorganic film layer.

[0177] In one embodiment, the groove 25 penetrates the organic film layer and part of the inorganic film layer. In this way, on the one hand, the depth of the groove 25 can be increased, thereby increasing the surface area of ​​the groove wall of the groove 25; on the other hand, part of the groove wall and the bottom wall of the groove 25 are located on the inorganic film layer, which can increase the contact area between the encapsulation layer 24 and the inorganic groove wall, thereby improving the film adhesion of the encapsulation layer 24, and further improving the encapsulation reliability of the encapsulation layer 24 as a whole, and improving the service life of the stretchable display panel 100.

[0178] In one embodiment, the driving layer group 21 includes an interlayer insulating layer 212 and a planarizing layer 213, and the interlayer insulating layer 212 is located between the substrate 1 and the planarizing layer 213. The material of the interlayer insulating layer 212 includes an inorganic material, and the material of the planarizing layer 213 includes an organic material, that is, the interlayer insulating layer 212 is an inorganic film layer, and the planarizing layer 213 is an organic film layer. The groove 25 penetrates the planarizing layer 213 and a portion of the interlayer insulating layer 212.

[0179] In this way, on the one hand, the depth of the groove 25 can be increased, thereby increasing the surface area of ​​the groove wall of the groove 25; on the other hand, part of the groove wall and the bottom wall of the groove 25 are located on the interlayer insulating layer 212, which can increase the contact area between the encapsulation layer 24 and the inorganic groove wall, thereby improving the film adhesion of the encapsulation layer 24, and further improving the encapsulation reliability of the encapsulation layer 24 as a whole, and improving the service life of the stretchable display panel 100; on the other hand, referring to Figure 2 As shown, after the encapsulation layer 24 contacts the interlayer insulating layer 212, it can completely wrap the light-emitting unit 23 and the planarization layer 213 (organic film layer) in the light-emitting area 2a, and the interlayer insulating layer 212 can prevent the water and oxygen on the side of the interlayer insulating layer 212 close to the substrate 1 from corroding toward the light-emitting unit 23, and the encapsulation layer 24 can prevent the water and oxygen on the side of the encapsulation layer 24 away from the substrate 1 from corroding toward the light-emitting unit 23, that is, a double-sided blocking structure is formed, which further improves the packaging reliability and ensures the packaging stability between the upper and lower film layers.

[0180] In one embodiment, the stretchable display panel 100 further includes a connecting line 3, which connects adjacent pixel islands 2. The driving layer group 21 includes a routing line 214, which is electrically connected to the connecting line 3. Exemplarily, a pixel driving circuit is provided on the driving layer group 21, one end of the routing line 214 is connected to the pixel driving circuit, and the other end of the routing line 214 is connected to the connecting line 3, that is, the connecting line 3 and the routing line 214 electrically connect the pixel driving circuits of adjacent pixel islands 2.

[0181] In one embodiment, referring to Figure 2 As shown, the wiring 214 includes a first wiring portion 2141 and a second wiring portion 2142, one end of the second wiring portion 2142 is electrically connected to the first wiring portion 2141, and the other end is electrically connected to the connecting line 3. The first wiring portion 2141 and the second wiring portion 2142 are arranged in different layers. In one example, one end of the first wiring portion 2141 away from the second wiring portion 2142 is connected to the pixel driving circuit.

[0182] It should be particularly emphasized that the "same-layer arrangement" in the embodiments of the present application means that the two structures are made of the same material in the same process. "Different-layer arrangement" means that the two structures are made separately in different processes. In addition, one end of the second wiring portion 2142 is electrically connected to the first wiring portion 2141. The "electrical connection" here can be a direct electrical connection between the two or an indirect electrical connection between the two. Similarly, the other end of the second wiring portion 2142 is electrically connected to the connecting line 3. Here, the two can be directly electrically connected or indirectly electrically connected.

[0183] It should be noted that since the bottom of the groove 25 extends into the driving layer group 21, it is easy to affect the line arrangement in the driving layer group 21. The embodiment of the present application optimizes the arrangement of the routing 214, that is, the first routing portion 2141 and the second routing portion 2142 are arranged in different layers, which is conducive to avoiding the groove 25 and reducing the influence of the groove 25 on the routing 214.

[0184] In one embodiment, the driving layer group 21 further includes a gate insulating layer 215 and a capacitor insulating layer 216, the gate insulating layer 215 and the capacitor insulating layer 216 are located between the substrate 1 and the interlayer insulating layer 212, and the gate insulating layer 215 is located between the substrate 1 and the capacitor insulating layer 216. The second wiring portion 2142 is located between the gate insulating layer 215 and the capacitor insulating layer 216.

[0185] In this way, by disposing the second wiring portion 2142 between the gate insulating layer 215 and the capacitor insulating layer 216 , it is beneficial to avoid the groove 25 and reduce the influence of the groove 25 on the wiring 214 .

[0186] In one embodiment, the driving layer group 21 further includes a gate 219, the gate 219 is located between the gate insulating layer 215 and the capacitor insulating layer 216, and the second wiring portion 2142 is disposed in the same layer as the gate 219. In this way, when the gate 219 is manufactured, the second wiring portion 2142 can be manufactured simultaneously, thereby reducing the manufacturing process of the stretchable display panel 100 and thus reducing the manufacturing cost.

[0187] In one embodiment, the first wiring portion 2141 is located between the interlayer insulating layer 212 and the planarization layer 213 .

[0188] It is understandable that a first metal layer (M1) is provided between the gate insulating layer 215 and the capacitor insulating layer 216, and the gate 219 and the capacitor lower plate (not shown) are usually located in the first metal layer. In the embodiment of the present application, the second wiring portion 2142 is also located in the first metal layer. A third metal layer (M3) is provided between the interlayer insulating layer 212 and the planarization layer 213, and some leads of the pixel driving circuit are usually provided in the third metal layer. In the embodiment of the present application, the first wiring portion 2141 is also located in the third metal layer, which can reduce the manufacturing process of the stretchable display panel 100, thereby reducing the manufacturing cost.

[0189] In one embodiment, a partial orthographic projection of the second wiring portion 2142 on the substrate 1 coincides with an orthographic projection of the groove 25 on the substrate 1. Figure 2 As shown, the groove 25 and the second wiring portion 2142 overlap in the vertical direction. Figure 2 It can be seen from the figure that if the second wiring portion 2142 is located between the interlayer insulating layer 212 and the planarization layer 213 , the groove 25 and the second wiring portion 2142 will interfere with each other, which not only affects the arrangement of the wiring 214 but also affects the setting of the groove 25 .

[0190] In one embodiment, the first wiring portion 2141 and the second wiring portion 2142 are electrically connected through the first via structure 2144. In this way, the electrical connection between the first wiring portion 2141 and the second wiring portion 2142 can be made simpler and easier to manufacture.

[0191] In one embodiment, a partial orthographic projection of the first routing portion 2141 on the substrate 1 coincides with an orthographic projection of the second routing portion 2142 on the substrate 1 .

[0192] In this way, when manufacturing the first wiring portion 2141 , the difficulty of electrical connection between the first wiring portion 2141 and the second wiring portion 2142 is reduced, and the reliability of electrical connection between the two is improved.

[0193] In one embodiment, the routing line 214 further includes a third routing line portion 2143, and the third routing line portion 2143 is electrically connected to the second routing line portion 2142 and the connection line 3. The third routing line portion 2143 and the second routing line portion 2142 are arranged in different layers.

[0194] In this way, the second routing portion 2142 is electrically connected to the connecting line 3 through the third routing portion 2143. On the one hand, it can reduce the difficulty of electrical connection between the routing 214 and the connecting line 3. On the other hand, it is beneficial to optimize the arrangement of the routing 214 and reduce the influence of the groove 25 on the routing 214.

[0195] In one embodiment, the third routing portion 2143 is disposed on the same layer as the first routing portion 2141. In this way, the first routing portion 2141 and the third routing portion 2143 can be manufactured at the same time, thereby reducing the manufacturing process and manufacturing difficulty of the routing 214.

[0196] In one embodiment, the third routing portion 2143 and the second routing portion 2142 are electrically connected through a second via structure 2145 .

[0197] In this way, the electrical connection between the third wiring portion 2143 and the second wiring portion 2142 can be made simpler and easier to manufacture.

[0198] In one embodiment, a portion of the orthographic projection of the third routing portion 2143 on the substrate 1 coincides with the orthographic projection of the second routing portion 2142 on the substrate 1 .

[0199] In this way, when manufacturing the third wiring portion 2143 , the difficulty of electrical connection between the third wiring portion 2143 and the second wiring portion 2142 is reduced, and the reliability of electrical connection between the two is improved.

[0200] In one embodiment, the orthographic projection of the encapsulation layer 24 on the pixel defining structure 22 covers the groove 25. That is, the encapsulation layer 24 covers the entire groove wall of the groove 25. In this way, the contact area of ​​the encapsulation layer 24 can be made larger, and the encapsulation reliability of the encapsulation layer 24 can be made better.

[0201] In one embodiment, a plurality of grooves 25 are disposed on the pixel defining structure 22 . The plurality of grooves 25 are arranged at intervals in the non-luminous area 2 b , and the encapsulation layer 24 covers the groove walls of the plurality of grooves 25 .

[0202] In this way, on the one hand, the groove 25 can be more effectively blocked from crack propagation, further slowing down the tendency of cracks to extend toward the light-emitting area 2a; on the other hand, it is beneficial to further increase the contact area of ​​the encapsulation layer 24, thereby improving the encapsulation reliability of the encapsulation layer 24; on the other hand, it is beneficial to further increase the contact area between the encapsulation layer 24 and the inorganic groove wall, thereby further improving the film adhesion of the encapsulation layer 24, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and improving the service life of the stretchable display panel 100.

[0203] In a preferred embodiment, the number of the grooves 25 is not less than 5 groups (pieces). In this way, the packaging reliability of the packaging layer 24 can be improved.

[0204] It should be noted that the applicant has discovered through research that by adopting the arrangement of the grooves 25 in the embodiment of the present application, 5 groups of grooves 25 are arranged. Compared with the structure without grooves 25 in the related art, while achieving the same packaging effect, the embodiment of the present application can make the width of the packaging area 2b2 between 20μm-30μm, which can save about 4μm-24μm of width space in the non-luminous area 2b1, and is conducive to reducing the width of the packaging frame of the pixel island 2.

[0205] In one embodiment, referring to Figure 3 As shown, the non-luminous area 2b is arranged around the periphery of the luminous area 2a, and the groove 25 is arranged around the periphery of the luminous area 2a. That is, the grooves 25 are arranged around the luminous area 2a. In this way, it is beneficial to improve the packaging reliability around the luminous area 2a, thereby improving the service life of the stretchable display panel 100 and improving the space utilization rate of the pixel island 2. Exemplarily, the optimized space can be allocated to the luminous area 2a or the connecting line 3, which is beneficial to improve the service life and stretching rate of the stretchable display panel 100.

[0206] In one embodiment, the orthographic projection of the groove 25 on the substrate 1 is a closed ring shape. In this way, the packaging reliability of the periphery of the light-emitting area 2a can be uniformly improved, ensuring that the packaging reliability of the packaging layer 24 is good.

[0207] Exemplarily, the orthographic projection shape of the groove 25 on the substrate 1 may be a rectangular ring, a circular ring, a triangular ring, or the like.

[0208] In one embodiment, referring to Figure 4 As shown, the groove 25 includes a plurality of first groove sections 251, and the plurality of first groove sections 251 are arranged at intervals around the periphery of the light emitting area 2a.

[0209] In this way, while improving the reliability of the packaging around the light-emitting area 2 a , the occupied area of ​​the groove 25 can be reduced, thereby reducing the etching cost of the groove 25 .

[0210] In a preferred embodiment, a plurality of first groove sections 251 are evenly arranged around the periphery of the light emitting area 2a, so that the packaging reliability around the light emitting area 2a can be improved relatively evenly.

[0211] In one embodiment, referring to Figure 5 As shown, in two adjacent grooves 25, each groove 25 includes a plurality of first groove sections 251. In the same groove 25, there is a gap between two adjacent first groove sections 251. In two adjacent grooves 25, the gap of one groove 25 is opposite to the first groove section 251 of the other groove 25.

[0212] In this way, the first groove sections 251 of two adjacent grooves 25 are arranged in a staggered manner, which not only reduces the occupied area of ​​the grooves 25 but also further improves the packaging reliability of the packaging layer 24 .

[0213] In one embodiment, referring to Figure 6 As shown, the groove 25 includes a first main groove 252 and a plurality of first sub-grooves 253. The orthographic projection of the first main groove 252 on the substrate 1 is a closed ring-shaped figure, and the first main groove 252 is arranged around the periphery of the light-emitting area 2a. The plurality of first sub-grooves 253 are arranged around the periphery of the light-emitting area 2a at intervals, and a portion of the orthographic projection of the first sub-grooves 253 on the substrate 1 coincides with the orthographic projection of the first main groove 252 on the driving layer group 21.

[0214] In this way, the contact area between the encapsulation layer 24 and the groove 25 can be further increased, thereby improving the encapsulation reliability of the encapsulation layer 24 .

[0215] In one embodiment, the first sub-groove 253 has a first end 253a and a second end 253b that are oppositely disposed, the first end 253a is located on a side of the first main groove 252 close to the light-emitting area 2a, and the second end 253b is located on a side of the first main groove 252 away from the non-light-emitting area 2b. That is, the first sub-groove 253 intersects with the first main groove 252.

[0216] In this way, on the one hand, the contact area between the encapsulation layer 24 and the groove 25 can be further increased, thereby improving the encapsulation reliability of the encapsulation layer 24; on the other hand, after the encapsulation layer 24 covers the first sub-groove 253 and the first main groove 252, the first main groove 252 and the first sub-groove 253 are equivalent to a "latch structure". When peeling occurs in the encapsulation layer 24, the latch structure can prevent the peeling from expanding, or, when the encapsulation layer 24 is cracked, the latch structure can prevent the crack from expanding, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and then improving the service life of the stretchable display panel 100.

[0217] In one embodiment, the dimension of the orthographic projection of the groove 25 on the substrate 1 along the first direction X is a first width W1 , the distance between two adjacent grooves 25 is a first spacing L1 , and the first width W1 is greater than or equal to the first spacing L1 .

[0218] The first direction X is perpendicular to the thickness direction of the substrate 1 , and perpendicular to the length direction of the orthographic projection of the groove 25 on the substrate 1 .

[0219] In this way, on the one hand, it is helpful to reduce the difficulty of etching the groove 25, and at the same time it is helpful to improve the adhesion stability between the encapsulation layer 24 and the groove 25; on the other hand, it is helpful to increase the number of grooves 25 in a limited space.

[0220] In one embodiment, referring to Figure 2 As shown, the driving layer group 21 includes a main body 2111 and an edge portion 2112 connected to the main body 2111. The pixel defining structure 22 and the light emitting unit 23 are both arranged on the main body 2111. At least one protective structure 26 is arranged on the edge portion 2112, and the protective structure 26 has at least one concave portion 26a, and the encapsulation layer 24 also covers the wall surface of the concave portion 26a.

[0221] Here, the protective structure 26 is a structure for slowing down the crack from extending toward the main body 2111 . Specifically, the protective structure 26 slows down the crack from extending through the recess 26 a .

[0222] In the embodiment of the present application, on the one hand, the recess 26a can slow down the tendency of cracks to expand toward the main body 2111, and on the other hand, the recess 26a can increase the contact area of ​​the encapsulation layer 24, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and further improving the service life of the stretchable display panel 100.

[0223] In one embodiment, along the thickness direction of the substrate 1 , the size of the main body 2111 is greater than the size of the edge 2112 , that is, the thickness of the main body 2111 is greater than the thickness of the edge 2112 .

[0224] In one example, the driving layer group 21 includes a base 211, which is disposed on the substrate 1, and other film layers of the driving layer group 21 are stacked on the base 211, for example: a blocking layer 217, a buffer layer 218, a gate insulating layer 215, a capacitor insulating layer 216, an interlayer insulating layer 212 and a planarization layer 213.

[0225] Specifically, the main body 2111 and the edge 2112 are arranged on the base 211. Thus, after the base 211 is manufactured, the edge of the base 211 is thinned to form the edge 2112, and the area not thinned is the main body 2111.

[0226] It should be noted that when the pixel island 2 is peeled off from the glass substrate, cracks are prone to form on the encapsulation layer 24 at the edge 2112 of the pixel island 2. The protective structure 26 can slow down the extension of cracks on the encapsulation layer 24 at the edge 2112 of the pixel island 2 to the side walls of the main body 2111 and the light-emitting area 2a. The protective structure 26 has the function of blocking and delaying the extension of cracks, effectively protecting the encapsulation layer 24 on the side walls and upper surface of the pixel island 2, and improving the encapsulation reliability.

[0227] In one embodiment, the encapsulation layer 24 also covers the side surface of the pixel defining structure 22 and the side surface of the main body 2111. Specifically, the encapsulation layer 24 extends along the top surface of the pixel defining structure 22 toward the edge portion 2112, and covers the side surface of the pixel defining structure 22 and the side surface of the main body 2111 on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0228] In one embodiment, the edge portion 2112 is disposed around the periphery of the main body portion 2111 , and the protection structure 26 is disposed around the periphery of the main body portion 2111 .

[0229] This is beneficial to improving the packaging reliability around the light-emitting area 2 a, and further improving the protection performance of the protection structure 26 .

[0230] In one embodiment, referring to Figure 2 As shown, a plurality of protection structures 26 arranged at intervals are disposed on the edge portion 2112 , and the encapsulation layer 24 covers the concave portion 26 a of each protection structure 26 .

[0231] In this way, by increasing the number of protection structures 26, it is equivalent to setting up multiple layers of protection, which can further improve the packaging reliability and protection performance.

[0232] In one embodiment, among two adjacent protective structures 26 , one protective structure 26 is disposed around the periphery of the main body 2111 , and the other protective structure 26 is disposed around the periphery of the one protective structure 26 .

[0233] In this way, it is equivalent to making the two protective structures 26 nested with each other around the periphery of the light-emitting area 2a, which is conducive to forming a multi-layer protective structure 26 that is nested around the periphery of the light-emitting area 2a, thereby further improving the packaging reliability and protective performance.

[0234] In one embodiment, referring to Figure 8 As shown, the protection structure 26 includes a plurality of substructures 26 b , and the plurality of substructures 26 b are arranged at intervals around the periphery of the main body 2111 .

[0235] In this way, the area occupied by the protection structure 26 can be reduced while improving the reliability of the packaging around the light-emitting area 2 a.

[0236] In a preferred embodiment, a plurality of substructures 26b are uniformly arranged around the periphery of the light-emitting area 2a, so that the packaging reliability around the light-emitting area 2a can be improved relatively uniformly.

[0237] In one embodiment, referring to Figure 8As shown, in two adjacent protective structures 26, each protective structure 26 includes a plurality of substructures 26b, and in the same protective structure 26, there is a gap between two adjacent substructures 26b. In two adjacent protective structures 26, the gap of one protective structure 26 is opposite to the substructure 26b of the other protective structure 26.

[0238] In this way, the substructures 26 b of two adjacent protection structures 26 are arranged in a staggered manner, which can not only reduce the occupied area of ​​the protection structure 26 , but also further improve the packaging reliability of the packaging layer 24 .

[0239] In one embodiment, referring to Figure 2 As shown, the dimension of the orthographic projection of the protection structure 26 on the substrate 1 along the first direction X is a second width W2, the distance between two adjacent protection structures 26 is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2.

[0240] The first direction X is perpendicular to the thickness direction of the substrate 1 and perpendicular to the length direction of the protection structure 26 .

[0241] In this way, on the one hand, it is beneficial to improve the adhesion stability between the encapsulation layer 24 and the protective structure 26, while reducing the space occupied by the protective structure 26; on the other hand, it is beneficial to deposit the encapsulation layer 24 between two adjacent protective structures 26, so that the structural contact between the encapsulation layer 24 and the two protective structures 26 is good, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0242] In the embodiment of the present application, the recess 26a is located on at least one side of the protective structure 26 along the first direction X. In one example, referring to Fig. 9 As shown, the protective structure 26 has a concave portion 26a on one side along the first direction X. Specifically, along the direction perpendicular to the paper surface, the cross-sectional shape of the protective structure 26 is a "C" shape.

[0243] In one embodiment, the protective structure 26 has a plurality of recesses 26a, and the encapsulation layer 24 covers the walls of the plurality of recesses 26a. In this way, on the one hand, the barrier capability of the protective structure 26 against crack propagation can be further improved, and on the other hand, the contact area between the encapsulation layer 24 and the protective structure 26 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and further improving the service life of the stretchable display panel 100.

[0244] In one embodiment, referring to Fig.10 and Fig.11 As shown, the protective structure 26 has two recesses 26 a , and the openings of the two recesses 26 a are opposite to each other.

[0245] In this way, after the packaging layer 24 completely covers the two recessed portions 26a of the protective structure 26, on the one hand, when the crack propagates along the packaging layer 24, the crack propagation path is tortuous, thereby increasing the difficulty of crack propagation and further hindering crack propagation; on the other hand, when the packaging layer 24 peels, the two recessed portions 26a of the protective structure 26 form a "latch structure" to lock the packaging layer 24, thereby reducing the peeling tendency of the packaging layer 24.

[0246] In one embodiment, referring to Fig.10 As shown, the protective structure 26 includes a first sub-portion 261 and a second sub-portion 262 which are sequentially stacked on the edge portion 2112, and the second sub-portion 262 protrudes from the side wall of the first sub-portion 261 at two opposite ends along the first direction X. The first direction X is perpendicular to the thickness direction of the substrate 1. The first sub-portion 261, the protruding part of the second sub-portion 262, and the edge portion 2112 define a recess 26a. In this way, the structure of the protective structure 26 can be made relatively simple.

[0247] Specifically, refer to Fig.10 As shown, along the direction perpendicular to the paper surface, the cross-sectional shape of the protection structure 26 is a "T" shape.

[0248] In one embodiment, referring to Fig.11 As shown, the protective structure 26 includes a third subdivision 263, a first subdivision 261, and a second subdivision 262 which are sequentially stacked on the edge portion 2112. The third subdivision 263 protrudes from the side wall of the first subdivision 261 at two opposite ends along the first direction X. The second subdivision 262 protrudes from the side wall of the first subdivision 261 at two opposite ends along the first direction X. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portion of the third subdivision 263, the first subdivision 261, and the protruding portion of the second subdivision 262 define a recess 26a. In this way, the contact area between the protective structure 26 and the encapsulation layer 24 can be made larger, which is conducive to improving the adhesion stability of the protective structure 26 and the encapsulation layer 24.

[0249] Specifically, refer to Fig.11 As shown, along the direction perpendicular to the paper surface, the cross-sectional shape of the protective structure 26 is an “I” shape.

[0250] In one embodiment, the material of the third section 263 is the same as the material of the second section 262 .

[0251] In one embodiment, the material of the third section 263 is different from the material of the first section 261 .

[0252] In one embodiment, the material of the third section 263 includes titanium, and the material of the first section 261 includes aluminum. That is, the protective structure 26 is a structure composed of three layers of titanium, aluminum and titanium. In this way, the laminated metal can be side-engraved to form the protective structure 26. It is understandable that the protective structure 26 can also be composed of laminated metals of other materials.

[0253] Second, refer to Figure 1 , Fig.12 , Fig.13 and Fig.14 As shown, an embodiment of the present application provides another stretchable display panel 100, which includes a substrate 1 and a plurality of pixel islands 2. The plurality of pixel islands 2 are arranged on the substrate 1 at intervals. The pixel island 2 has a light-emitting area 2a and a non-light-emitting area 2b adjacent to the light-emitting area 2a. Exemplarily, the substrate 1 is a flexible substrate 1 having stretchability.

[0254] Specifically, the pixel island 2 includes a driving layer group 21, a light-emitting unit 23, an encapsulation auxiliary structure 27 and an encapsulation layer 24. The driving layer group 21 is provided on the substrate 1. The light-emitting unit 23 is provided on the driving layer group 21 and is located in the light-emitting area 2a. The encapsulation auxiliary structure 27 is provided on the driving layer group 21 and is located in the non-light-emitting area 2b. At least one groove 271 is provided on the side of the encapsulation auxiliary structure 27 away from the driving layer group 21. The encapsulation auxiliary structure 27 includes an inorganic material. The encapsulation layer 24 covers the side of the light-emitting unit 23 away from the substrate 1 and the groove wall of the groove 271.

[0255] In the embodiment of the present application, the encapsulation layer 24 is an inorganic encapsulation layer film layer. The encapsulation layer 24 extends from the surface of the light-emitting unit 23 toward the non-light-emitting area 2 b and covers the surface of the encapsulation auxiliary structure 27 and the groove wall of the groove 271 .

[0256] It should be noted that the groove 271 is an inorganic groove, that is, the groove 271 is a groove structure whose groove wall is made of inorganic material. In the embodiment of the present application, the non-luminous area 2b includes a transition area 2b1 and an encapsulation area 2b2, and the transition area 2b1 is located between the encapsulation area 2b2 and the luminous area 2a. Exemplarily, the encapsulation auxiliary structure 27 can be arranged in the encapsulation area 2b2. Further, the non-luminous area 2b is arranged around the periphery of the luminous area 2a.

[0257] The stretchable display panel 100 provided in the embodiment of the present application, by setting a packaging auxiliary structure 27 on the driving layer group 21, and setting a groove 271 on the packaging auxiliary structure 27, so that the packaging layer 24 extends to cover the groove wall of the groove 271. In this way, on the one hand, the groove 271 can slow down the tendency of the crack to extend toward the light-emitting area 2a; on the other hand, the groove 271 can increase the contact area of ​​the packaging layer 24 and improve the packaging performance of the packaging layer 24; on the other hand, the packaging layer 24 is in direct contact with the inorganic groove 271, that is, the inorganic film layer is in contact with the inorganic film layer, which can improve the film layer adhesion of the packaging layer 24, thereby further improving the packaging performance of the packaging layer 24, and then improving the packaging reliability of the packaging layer 24 as a whole, and improving the service life of the stretchable display panel 100.

[0258] It can be understood that the light-emitting unit 23 includes a first electrode 231, a light-emitting functional part 232, and a second electrode 233 stacked in a direction away from the substrate 1. The light-emitting functional part 232 includes at least a light-emitting layer (Emission layer, EML), and may also include a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole blocking layer (HBL) and an electron blocking layer (EBL) One or more. Alternatively, the light-emitting functional part 232 may also be a stacked light-emitting layer, that is, including at least two light-emitting layers and a charge generation layer (CGL) located between each adjacent light-emitting layer.

[0259] In one embodiment, a plurality of grooves 271 arranged at intervals are disposed on a side of the encapsulation auxiliary structure 27 away from the driving layer group 21 , and the encapsulation layer 24 covers the groove walls of the plurality of grooves 271 .

[0260] In this way, on the one hand, the groove 271 can be more effective in hindering the expansion of cracks, further slowing down the tendency of the cracks to extend toward the light-emitting area 2a; on the other hand, it is beneficial to further increase the contact area between the encapsulation layer 24 and the inorganic groove wall, thereby further improving the film adhesion of the encapsulation layer 24, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and improving the service life of the stretchable display panel 100.

[0261] In a preferred embodiment, the number of the grooves 271 is not less than 5 groups (individuals). In this way, the packaging reliability of the packaging layer 24 can be improved.

[0262] It should be noted that the applicant has discovered through research that by adopting the arrangement of the grooves 271 in the embodiment of the present application, 5 groups of grooves 271 are arranged. Compared with the structure without grooves 271 in the related art, while achieving the same packaging effect, the embodiment of the present application can save approximately 14μm-24μm of width space in the non-luminous area 2b, which is beneficial to reducing the width of the packaging frame of the pixel island 2.

[0263] In one embodiment, the orthographic projection of the encapsulation layer 24 on the substrate 1 covers the orthographic projection of the groove 271 on the substrate 1. That is, the encapsulation layer 24 covers the entire groove wall of the groove 271. In this way, the contact area of ​​the encapsulation layer 24 can be made larger, and the encapsulation reliability of the encapsulation layer 24 can be made better.

[0264] It should be noted that the arrangement of the grooves 271 in the embodiment of the present application can refer to Figure 3-Figure 6 The arrangement of the grooves 25 is shown in FIG.

[0265] In one embodiment, the packaging auxiliary structure 27 is disposed around the periphery of the light-emitting area 2a, and the groove 271 is disposed around the periphery of the light-emitting area 2a. That is, the grooves 271 are disposed around the light-emitting area 2a. This is conducive to improving the packaging reliability around the light-emitting area 2a, thereby improving the service life of the stretchable display panel 100.

[0266] In one embodiment, the orthographic projection of the groove 271 on the substrate 1 is a closed ring shape. In this way, the packaging reliability of the periphery of the light-emitting area 2a can be uniformly improved, ensuring that the packaging reliability of the packaging layer 24 is good.

[0267] Exemplarily, the orthographic projection shape of the groove 271 on the substrate 1 may be a rectangular ring, a circular ring, a triangular ring, or the like.

[0268] In one embodiment, the groove 271 includes a plurality of second groove segments, and the plurality of second groove segments are spaced apart and arranged around the periphery of the light emitting area 2 a.

[0269] In this way, while improving the reliability of the peripheral packaging of the light-emitting area 2 a , the occupied area of ​​the groove 271 can be reduced, thereby reducing the etching cost of the groove 271 .

[0270] In a preferred embodiment, a plurality of second groove sections are evenly arranged around the periphery of the light emitting area 2a, so that the packaging reliability around the light emitting area 2a can be improved relatively evenly.

[0271] In one embodiment, in two adjacent grooves 271, each groove 271 includes a plurality of second groove segments. In the same groove 271, there is a gap between two adjacent second groove segments. In two adjacent grooves 271, the gap of one groove 271 is opposite to the second groove segment of the other groove 271.

[0272] In this way, the second groove sections of two adjacent grooves 271 are arranged in a staggered manner, which not only reduces the occupied area of ​​the grooves 271 but also further improves the packaging reliability of the packaging layer 24 .

[0273] In one embodiment, the groove 271 includes a second main groove and a plurality of second sub-grooves. The orthographic projection of the second main groove on the substrate 1 is a closed ring-shaped figure, and the second main groove is arranged around the periphery of the light-emitting area 2a. The plurality of second sub-grooves are arranged around the periphery of the light-emitting area 2a at intervals, and a portion of the orthographic projection of the second sub-grooves on the substrate 1 coincides with the orthographic projection of the second main groove on the substrate 1.

[0274] In this way, the contact area between the encapsulation layer 24 and the groove 271 can be further increased, thereby improving the encapsulation reliability of the encapsulation layer 24 .

[0275] In one embodiment, the second sub-groove has a third end and a fourth end that are oppositely disposed, the third end is located on a side of the second main groove close to the light-emitting area 2a, and the fourth end is located on a side of the second main groove away from the non-light-emitting area 2b. That is, the second sub-groove intersects with the second main groove.

[0276] In this way, on the one hand, the contact area between the encapsulation layer 24 and the groove 271 can be further increased, thereby improving the encapsulation reliability of the encapsulation layer 24; on the other hand, after the encapsulation layer 24 covers the second sub-groove and the second main groove, the second main groove and the second sub-groove are equivalent to a "latch structure". When peeling occurs in the encapsulation layer 24, the latch structure can prevent the peeling from expanding, or, when the encapsulation layer 24 is cracked, the latch structure can prevent the crack from expanding, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and then improving the service life of the stretchable display panel 100.

[0277] In one embodiment, the dimension of the orthographic projection of the groove 271 on the substrate 1 along the first direction X is a third width W3, the distance between two adjacent grooves 271 is a third spacing L3, and the third width W3 is greater than or equal to the third spacing L3.

[0278] The first direction X is perpendicular to the thickness direction of the substrate 1 , and perpendicular to the length direction of the orthographic projection of the groove 271 on the substrate 1 .

[0279] In this way, on the one hand, it is helpful to reduce the difficulty of etching the groove 271 and at the same time it is helpful to improve the adhesion stability between the encapsulation layer 24 and the groove 271; on the other hand, it is helpful to increase the number of grooves 271 in a limited space.

[0280] In one embodiment, referring to Fig.12 and Fig.13As shown, at least one protrusion 272 is provided on one side of the packaging auxiliary structure 27 close to the driving layer group 21 , and at least one recess 2131 is provided on one side of the driving layer group 21 close to the packaging auxiliary structure 27 , and the at least one protrusion 272 and the at least one recess 2131 are embedded.

[0281] The protrusions 272 and the recesses 2131 can increase the contact area between the auxiliary packaging structure 27 and the driving layer group 21 , thereby increasing the bonding force between the two and improving the stability of the auxiliary packaging structure 27 .

[0282] In one embodiment, a plurality of protrusions 272 arranged at intervals are provided on one side of the packaging auxiliary structure 27 close to the driving layer group 21, and a plurality of recesses 2131 are provided on one side of the driving layer group 21 close to the packaging auxiliary structure 27, and the plurality of protrusions 272 and the plurality of recesses 2131 are fitted into each other in a one-to-one correspondence.

[0283] In this way, the contact area between the packaging auxiliary structure 27 and the driving layer group 21 can be further increased, thereby further improving the bonding force between the two and making the packaging auxiliary structure 27 more stable.

[0284] In one embodiment, a plurality of grooves 271 arranged at intervals are provided on the encapsulation auxiliary structure 27, and the orthographic projection of a groove 271 on the driving layer group 21 coincides with the orthographic projection of a protrusion 272 on the driving layer group 21. That is, the orthographic projection of a groove 271 on the driving layer group 21 falls within the orthographic projection of a protrusion 272 on the driving layer group 21. It can also be understood that the setting position of the groove 271 is opposite to the setting position of the protrusion 272.

[0285] In one example, the orthographic projections of the two grooves 271 on the driving layer group 21 both fall within the orthographic projection of the same protrusion 272 on the driving layer group 21 .

[0286] It should be noted that by providing a protrusion 272 and providing a groove 271 on the side of the protrusion 272 facing away from the substrate 1, on the one hand, the depth of the groove 271 can be made deeper, thereby increasing the contact area between the packaging layer 24 and the groove 271; on the other hand, it is beneficial to increase the thickness of the packaging auxiliary structure 27 at various positions (the size of the packaging auxiliary structure 27 along the thickness direction of the substrate 1), ensuring that the structural strength of the packaging auxiliary structure 27 is high, so that the packaging auxiliary structure 27 is not easy to break.

[0287] In one embodiment, the plurality of grooves 271 correspond to the plurality of protrusions 272 one by one, and the orthographic projection of each groove 271 on the driving layer group 21 coincides with the orthographic projection of the corresponding protrusion 272 on the driving layer group 21. That is, each groove 271 and each protrusion 272 are disposed opposite to each other on both sides of the packaging auxiliary structure 27.

[0288] This is beneficial to increase the thickness of the packaging auxiliary structure 27 at various positions (the size of the packaging auxiliary structure 27 along the thickness direction of the substrate 1), ensure the structural strength of the packaging auxiliary structure 27 is high, and make the packaging auxiliary structure 27 less likely to break.

[0289] In one embodiment, the driving layer group 21 includes a planarization layer 213 , and the recessed portion 2131 is disposed on a surface of the planarization layer 213 that is away from the substrate 1 .

[0290] In one example, the pixel island 2 further includes a pixel defining structure 22, which is disposed on a surface of the planarization layer 213 away from the substrate 1, and defines a pixel opening in the light emitting area 2a. The light emitting unit 23 is disposed in the pixel opening.

[0291] In one embodiment, along the thickness direction of the substrate 1 , the size of the recessed portion 2131 is H1 , the size of the planarization layer 213 is H2 , and H1 and H2 satisfy the relationship: H1 ≤ 0.5H2 .

[0292] In this way, the thickness of the planarization layer 213 directly below the recessed portion 2131 can be avoided to be too thin, which is beneficial to ensuring the structural strength of the planarization layer 213 and making the planarization layer 213 less likely to break.

[0293] In one embodiment, referring to Fig.14 As shown, the surface of one side of the packaging auxiliary structure 27 close to the driving layer group 21 is a plane. In this way, the difficulty of manufacturing the packaging auxiliary structure 27 can be reduced.

[0294] In one embodiment, the stretchable display panel 100 includes a pixel defining structure 22, which is disposed on the driving layer group 21, and the pixel defining structure 22 defines a pixel opening located in the light-emitting area 2a. The light-emitting unit 23 is disposed in the pixel opening. The surface of the pixel defining structure 22 on one side close to the driving layer group 21 is flush with the surface of the encapsulation auxiliary structure 27 on one side close to the driving layer group 21. In this way, the encapsulation auxiliary structure 27 and the pixel defining structure 22 can be made on the surface of the same film layer to prevent the encapsulation auxiliary structure 27 from causing adverse effects on the circuit layout and film layer layout in the driving layer group 21.

[0295] In a specific embodiment, the driving layer group 21 includes a planarization layer 213 , and the encapsulation auxiliary structure 27 and the pixel definition structure 22 are arranged on a surface of the planarization layer 213 which is away from the substrate 1 .

[0296] In one embodiment, the pixel defining structure 22 is adjacent to the encapsulation auxiliary structure 27. This facilitates the encapsulation layer 24 to extend from the surface of the pixel defining structure 22 to the surface of the encapsulation auxiliary structure 27 and form a continuous film structure.

[0297] In one embodiment, the driving layer group 21 includes a main body 2111 and an edge portion 2112 connected to the main body 2111. The light-emitting unit 23 is disposed on the main body 2111. At least one protective structure 26 is disposed on the edge portion 2112, and the protective structure 26 has at least one concave portion 26a, and the encapsulation layer 24 also covers the wall surface of the concave portion 26a.

[0298] Here, the protective structure 26 is a structure for slowing down the crack from extending toward the main body 2111 . Specifically, the protective structure 26 slows down the crack from extending through the recess 26 a .

[0299] In the embodiment of the present application, on the one hand, the recess 26a can slow down the tendency of cracks to expand toward the main body 2111, and on the other hand, the recess 26a can increase the contact area of ​​the encapsulation layer 24, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and further improving the service life of the stretchable display panel 100.

[0300] In one embodiment, along the thickness direction of the substrate 1 , the size of the main body 2111 is greater than the size of the edge 2112 , that is, the thickness of the main body 2111 is greater than the thickness of the edge 2112 .

[0301] In one example, the driving layer group 21 includes a base 211, which is disposed on the substrate 1, and other film layers of the driving layer group 21 are stacked on the base 211, for example: a blocking layer 217, a buffer layer 218, a gate insulating layer 215, a capacitor insulating layer 216, an interlayer insulating layer 212 and a planarization layer 213.

[0302] Specifically, the main body 2111 and the edge 2112 are arranged on the base 211. Thus, after the base 211 is manufactured, the edge of the base 211 is thinned to form the edge 2112, and the area not thinned is the main body 2111.

[0303] It should be noted that when the pixel island 2 is peeled off from the glass substrate, cracks are prone to form on the encapsulation layer 24 at the edge 2112 of the pixel island 2. The protective structure 26 can slow down the extension of cracks on the encapsulation layer 24 at the edge 2112 of the pixel island 2 to the side walls of the main body 2111 and the light-emitting area 2a. The protective structure 26 has the function of blocking and delaying the extension of cracks, effectively protecting the encapsulation layer 24 on the side walls and upper surface of the pixel island 2, and improving the encapsulation reliability.

[0304] In one embodiment, the stretchable display panel 100 includes a pixel defining structure 22, which is disposed on the main body 2111, and the pixel defining structure 22 defines a pixel opening located in the light-emitting area 2a. The light-emitting unit 23 is disposed in the pixel opening. The encapsulation layer 24 also covers the side surface of the pixel defining structure 22 and the side surface of the main body 2111. Specifically, the encapsulation layer 24 extends along the top surface of the pixel defining structure 22 toward the edge portion 2112, and covers the side surface of the pixel defining structure 22 and the side surface of the main body 2111 on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0305] In one embodiment, the edge portion 2112 is disposed around the periphery of the main body portion 2111 , and the protection structure 26 is disposed around the periphery of the main body portion 2111 .

[0306] This is beneficial to improving the packaging reliability around the light-emitting area 2 a, and further improving the protection performance of the protection structure 26 .

[0307] In one embodiment, referring to Figure 2 As shown, a plurality of protection structures 26 arranged at intervals are disposed on the edge portion 2112 , and the encapsulation layer 24 covers the concave portion 26 a of each protection structure 26 .

[0308] In this way, by increasing the number of protection structures 26, it is equivalent to setting up multiple layers of protection, which can further improve the packaging reliability and protection performance.

[0309] In one embodiment, among two adjacent protective structures 26 , one protective structure 26 is disposed around the periphery of the main body 2111 , and the other protective structure 26 is disposed around the periphery of the one protective structure 26 .

[0310] In this way, it is equivalent to making the two protective structures 26 nested with each other around the periphery of the light-emitting area 2a, which is conducive to forming a multi-layer protective structure 26 that is nested around the periphery of the light-emitting area 2a, thereby further improving the packaging reliability and protective performance.

[0311] In one embodiment, referring to Figure 8 As shown, the protection structure 26 includes a plurality of substructures 26 b , and the plurality of substructures 26 b are arranged at intervals around the periphery of the main body 2111 .

[0312] In this way, the area occupied by the protection structure 26 can be reduced while improving the reliability of the packaging around the light-emitting area 2 a.

[0313] In a preferred embodiment, a plurality of substructures 26b are uniformly arranged around the periphery of the light-emitting area 2a, so that the packaging reliability around the light-emitting area 2a can be improved relatively uniformly.

[0314] In one embodiment, referring to Figure 8 As shown, in two adjacent protective structures 26, each protective structure 26 includes a plurality of substructures 26b, and in the same protective structure 26, there is a gap between two adjacent substructures 26b. In two adjacent protective structures 26, the gap of one protective structure 26 is opposite to the substructure 26b of the other protective structure 26.

[0315] In this way, the substructures 26 b of two adjacent protection structures 26 are arranged in a staggered manner, which can not only reduce the occupied area of ​​the protection structure 26 , but also further improve the packaging reliability of the packaging layer 24 .

[0316] In one embodiment, referring to Figure 2 As shown, the dimension of the orthographic projection of the protection structure 26 on the substrate 1 along the first direction X is a second width W2, the distance between two adjacent protection structures 26 is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2.

[0317] The first direction X is perpendicular to the thickness direction of the substrate 1 and perpendicular to the length direction of the protection structure 26 .

[0318] In this way, on the one hand, it is beneficial to improve the adhesion stability between the encapsulation layer 24 and the protective structure 26, while reducing the space occupied by the protective structure 26; on the other hand, it is beneficial to deposit the encapsulation layer 24 between two adjacent protective structures 26, so that the structural contact between the encapsulation layer 24 and the two protective structures 26 is good, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0319] In the embodiment of the present application, the recess 26a is located on at least one side of the protective structure 26 along the first direction X. In one example, referring to Fig. 9 As shown, the protective structure 26 has a concave portion 26a on one side along the first direction X. Specifically, along the direction perpendicular to the paper surface, the cross-sectional shape of the protective structure 26 is a "C" shape.

[0320] In one embodiment, the protective structure 26 has a plurality of recesses 26a, and the encapsulation layer 24 covers the walls of the plurality of recesses 26a. In this way, on the one hand, the barrier capability of the protective structure 26 against crack propagation can be further improved, and on the other hand, the contact area between the encapsulation layer 24 and the protective structure 26 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and further improving the service life of the stretchable display panel 100.

[0321] In one embodiment, referring to Fig.10 and Fig.11 As shown, the protective structure 26 has two recesses 26 a , and the openings of the two recesses 26 a are opposite to each other.

[0322] In this way, after the packaging layer 24 completely covers the two recessed portions 26a of the protective structure 26, on the one hand, when the crack propagates along the packaging layer 24, the crack propagation path is tortuous, thereby increasing the difficulty of crack propagation and further hindering crack propagation; on the other hand, when the packaging layer 24 peels, the two recessed portions 26a of the protective structure 26 form a "latch structure" to lock the packaging layer 24, thereby reducing the tendency of the packaging layer 24 to peel.

[0323] In one embodiment, referring to Fig.10 As shown, the protective structure 26 includes a first sub-portion 261 and a second sub-portion 262 which are sequentially stacked on the edge portion 2112, and the second sub-portion 262 protrudes from the side wall of the first sub-portion 261 at two opposite ends along the first direction X. The first direction X is perpendicular to the thickness direction of the substrate 1. The first sub-portion 261, the protruding part of the second sub-portion 262, and the edge portion 2112 define a recess 26a. In this way, the structure of the protective structure 26 can be made relatively simple.

[0324] Specifically, refer to Fig.10 As shown, along the direction perpendicular to the paper surface, the cross-sectional shape of the protection structure 26 is a "T" shape.

[0325] In one embodiment, referring to Fig.11 As shown, the protective structure 26 includes a third subdivision 263, a first subdivision 261, and a second subdivision 262 which are sequentially stacked on the edge portion 2112. The third subdivision 263 protrudes from the side wall of the first subdivision 261 at two opposite ends along the first direction X. The second subdivision 262 protrudes from the side wall of the first subdivision 261 at two opposite ends along the first direction X. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portion of the third subdivision 263, the first subdivision 261, and the protruding portion of the second subdivision 262 define a recess 26a. In this way, the contact area between the protective structure 26 and the encapsulation layer 24 can be made larger, which is conducive to improving the adhesion stability of the protective structure 26 and the encapsulation layer 24.

[0326] Specifically, refer to Fig.11 As shown, along the direction perpendicular to the paper surface, the cross-sectional shape of the protective structure 26 is an “I” shape.

[0327] In one embodiment, the material of the third section 263 is the same as the material of the second section 262 .

[0328] In one embodiment, the material of the third section 263 is different from the material of the first section 261 .

[0329] In one embodiment, the material of the third section 263 includes titanium, and the material of the first section 261 includes aluminum. That is, the protective structure 26 is a structure composed of three layers of titanium, aluminum and titanium. In this way, the laminated metal can be side-engraved to form the protective structure 26. It is understandable that the protective structure 26 can also be composed of laminated metals of other materials.

[0330] In one embodiment, referring to Fig.12 and Fig.14 As shown, the stretchable display panel 100 also includes a connecting line 3, which connects adjacent pixel islands 2. The driving layer group 21 includes a wiring 214, which is electrically connected to the connecting line 3. Exemplarily, a pixel driving circuit is provided on the driving layer group 21, one end of the wiring 214 is connected to the pixel driving circuit, and the other end of the wiring 214 is connected to the connecting line 3, that is, the connecting line 3 and the wiring 214 electrically connect the pixel driving circuits of adjacent pixel islands 2.

[0331] In one example, the trace 214 is disposed between the interlayer insulating layer 212 and the planarization layer 213 .

[0332] It should be noted that a third metal layer (M3) is arranged between the interlayer insulating layer 212 and the planarization layer 213. Some leads of the pixel driving circuit are usually arranged on the third metal layer. In the embodiment of the present application, the wiring 214 is also located in the third metal layer, which can reduce the manufacturing process of the stretchable display panel 100 and thus reduce the manufacturing cost.

[0333] In addition, compared with the display panel in the first aspect, the display panel in the second aspect can improve the adverse effect of the arrangement of the grooves 271 on the wiring 214 in the driving layer group 21 , thereby reducing the manufacturing cost of the display panel.

[0334] Thirdly, refer to Figure 2 , Fig.12 and Fig.14 As shown, an embodiment of the present application provides another stretchable display panel 100, which includes a substrate 1 and a plurality of pixel islands 2. The plurality of pixel islands 2 are arranged on the substrate 1 at intervals. The pixel island 2 has a light-emitting area 2a and a non-light-emitting area 2b adjacent to the light-emitting area 2a. Exemplarily, the substrate 1 is a flexible substrate 1 having stretchability.

[0335] Specifically, the pixel island 2 includes a driving layer group 21, a pixel defining structure 22, a light-emitting unit 23 and an encapsulation layer 24. The driving layer group 21 is disposed on the substrate 1, and the driving layer group 21 includes a main body 2111 and an edge portion 2112 connected to the main body 2111. The light-emitting unit 23 is disposed on the main body 2111. The protective structure 26 is disposed on the edge portion 2112, and the protective structure 26 has at least one recess 26a. The encapsulation layer 24 covers the side of the light-emitting unit 23 away from the substrate 1 and the wall surface of the recess 26a.

[0336] Specifically, the encapsulation layer 24 is an inorganic encapsulation layer film layer. The encapsulation layer 24 extends from the surface of the light emitting unit 23 toward the edge portion 2112 and covers the surface of the protection structure 26 and the wall surface of the recess 26a.

[0337] Here, the protective structure 26 is a structure for slowing down the crack from extending toward the main body 2111 . Specifically, the protective structure 26 slows down the crack from extending through the recess 26 a .

[0338] The stretchable display panel 100 provided in the embodiment of the present application, by setting a protective structure 26 on the edge portion 2112 and setting a recess 26a on the protective structure 26, allows the encapsulation layer 24 to extend and cover the wall surface of the recess 26a. In this way, on the one hand, the recess 26a can slow down the tendency of cracks to expand toward the main body 2111, and on the other hand, the recess 26a can increase the contact area of ​​the encapsulation layer 24, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and further improving the service life of the stretchable display panel 100.

[0339] It can be understood that, in one example, the driving layer group 21 has a substrate 211, and the driving layer group 21 is disposed on the substrate 1 through its own substrate 211. In another example, the driving layer group 21 does not have a substrate 211, that is, the driving layer group 21 is directly disposed on the substrate 1, in which case the substrate 1 may be provided with a stretching area and a pixel area, and the driving layer group 21 is disposed in the pixel area, and when stretched, the stretching area is stretched, and the pixel area is not stretchable.

[0340] It can be understood that the light-emitting unit 23 includes a first electrode 231, a light-emitting functional part 232, and a second electrode 233 stacked in a direction away from the substrate 1. The light-emitting functional part 232 includes at least a light-emitting layer (Emission layer, EML), and may also include a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), an electron transport layer (ETL), a hole blocking layer (HBL) and an electron blocking layer (EBL) One or more. Alternatively, the light-emitting functional part 232 may also be a stacked light-emitting layer, that is, including at least two light-emitting layers and a charge generation layer (CGL) located between each adjacent light-emitting layer.

[0341] In one embodiment, along the thickness direction of the substrate 1 , the size of the main body 2111 is greater than the size of the edge 2112 , that is, the thickness of the main body 2111 is greater than the thickness of the edge 2112 .

[0342] In one example, the driving layer group 21 includes a base 211, which is disposed on the substrate 1, and other film layers of the driving layer group 21 are stacked on the base 211, for example: a blocking layer 217, a buffer layer 218, a gate insulating layer 215, a capacitor insulating layer 216, an interlayer insulating layer 212 and a planarization layer 213.

[0343] Specifically, the main body 2111 and the edge 2112 are arranged on the base 211. Thus, after the base 211 is manufactured, the edge of the base 211 is thinned to form the edge 2112, and the area not thinned is the main body 2111.

[0344] It should be noted that when the pixel island 2 is peeled off from the glass substrate, cracks are prone to form on the encapsulation layer 24 at the edge 2112 of the pixel island 2. The protective structure 26 can slow down the extension of cracks on the encapsulation layer 24 at the edge 2112 of the pixel island 2 to the side walls of the main body 2111 and the light-emitting area 2a. The protective structure 26 has the function of blocking and delaying the extension of cracks, effectively protecting the encapsulation layer 24 on the side walls and upper surface of the pixel island 2, and improving the encapsulation reliability.

[0345] In one embodiment, the stretchable display panel 100 includes a pixel defining structure 22, the pixel defining structure 22 is disposed on the main body 2111, the pixel defining structure 22 defines a pixel opening located in the light-emitting area 2a, and the light-emitting unit 23 is disposed in the pixel opening. The encapsulation layer 24 also covers the side surface of the pixel defining structure 22 and the side surface of the main body 2111. Specifically, the encapsulation layer 24 extends along the top surface of the pixel defining structure 22 toward the edge portion 2112, and covers the side surface of the pixel defining structure 22 and the side surface of the main body 2111 on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0346] In one embodiment, the edge portion 2112 is disposed around the periphery of the main body portion 2111 , and the protection structure 26 is disposed around the periphery of the main body portion 2111 .

[0347] This is beneficial to improving the packaging reliability around the light-emitting area 2 a, and further improving the protection performance of the protection structure 26 .

[0348] In one embodiment, referring to Figure 2 As shown, a plurality of protection structures 26 arranged at intervals are disposed on the edge portion 2112 , and the encapsulation layer 24 covers the concave portion 26 a of each protection structure 26 .

[0349] In this way, by increasing the number of protection structures 26, it is equivalent to setting up multiple layers of protection, which can further improve the packaging reliability and protection performance.

[0350] In one embodiment, among two adjacent protective structures 26 , one protective structure 26 is disposed around the periphery of the main body 2111 , and the other protective structure 26 is disposed around the periphery of the one protective structure 26 .

[0351] In this way, it is equivalent to making the two protective structures 26 nested around the outer periphery of the main body 2111, which is conducive to forming a multi-layer protective structure 26 that is nested around the outer periphery of the main body 2111, thereby further improving the packaging reliability and protective performance.

[0352] In a specific embodiment, referring to Figure 7 As shown, two protective structures 26 are arranged on the edge portion 2112, and the two protective structures 26 are nested and arranged around the periphery of the main body 2111. In this way, the light-emitting unit 23 and other organic film layers on the main body 2111 are double-wrapped, thereby effectively preventing water vapor from invading from the edge portion 2112 to the main body 2111, and effectively preventing cracks from extending from the edge portion 2112 to the main body 2111.

[0353] In one embodiment, referring to Figure 8As shown, the protection structure 26 includes a plurality of substructures 26 b , and the plurality of substructures 26 b are arranged at intervals around the periphery of the main body 2111 .

[0354] In this way, the area occupied by the protection structure 26 can be reduced while improving the reliability of the packaging around the light-emitting area 2 a.

[0355] In a preferred embodiment, a plurality of substructures 26b are uniformly arranged around the periphery of the light-emitting area 2a, so that the packaging reliability around the light-emitting area 2a can be improved relatively uniformly.

[0356] In one embodiment, referring to Figure 8 As shown, in two adjacent protective structures 26, each protective structure 26 includes a plurality of substructures 26b, and in the same protective structure 26, there is a gap between two adjacent substructures 26b. In two adjacent protective structures 26, the gap of one protective structure 26 is opposite to the substructure 26b of the other protective structure 26.

[0357] In this way, the substructures 26 b of two adjacent protection structures 26 are arranged in a staggered manner, which can not only reduce the occupied area of ​​the protection structure 26 , but also further improve the packaging reliability of the packaging layer 24 .

[0358] In one embodiment, referring to Figure 2 As shown, the dimension of the orthographic projection of the protection structure 26 on the substrate 1 along the first direction X is a second width W2, the distance between two adjacent protection structures 26 is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2.

[0359] The first direction X is perpendicular to the thickness direction of the substrate 1 and perpendicular to the length direction of the protection structure 26 .

[0360] In this way, on the one hand, it is beneficial to improve the adhesion stability between the encapsulation layer 24 and the protective structure 26, while reducing the space occupied by the protective structure 26; on the other hand, it is beneficial to deposit the encapsulation layer 24 between two adjacent protective structures 26, so that the structural contact between the encapsulation layer 24 and the two protective structures 26 is good, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0361] In the embodiment of the present application, the recess 26a is located on at least one side of the protective structure 26 along the first direction X. In one example, referring to Fig. 9 As shown, the protective structure 26 has a concave portion 26a on one side along the first direction X. Specifically, along the direction perpendicular to the paper surface, the cross-sectional shape of the protective structure 26 is a "C" shape.

[0362] In one embodiment, the protective structure 26 has a plurality of recesses 26a, and the encapsulation layer 24 covers the walls of the plurality of recesses 26a. In this way, on the one hand, the barrier capability of the protective structure 26 against crack propagation can be further improved, and on the other hand, the contact area between the encapsulation layer 24 and the protective structure 26 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24 as a whole, and further improving the service life of the stretchable display panel 100.

[0363] In one embodiment, referring to Fig.10 and Fig.11 As shown, the protective structure 26 has two recesses 26 a , and the openings of the two recesses 26 a are opposite to each other.

[0364] In this way, after the packaging layer 24 completely covers the two recessed portions 26a of the protective structure 26, on the one hand, when the crack propagates along the packaging layer 24, the crack propagation path is tortuous, thereby increasing the difficulty of crack propagation and further hindering crack propagation; on the other hand, when the packaging layer 24 peels, the two recessed portions 26a of the protective structure 26 form a "latch structure" to lock the packaging layer 24, thereby reducing the peeling tendency of the packaging layer 24.

[0365] In one embodiment, the protective structure 26 includes a first sub-portion 261 and a second sub-portion 262 which are sequentially stacked on the edge portion 2112, and the second sub-portion 262 protrudes from the side wall of the first sub-portion 261 at two opposite ends along the first direction X. The first direction X is perpendicular to the thickness direction of the substrate 1. The first sub-portion 261, the protruding portion of the second sub-portion 262, and the edge portion 2112 define a recess 26a. In this way, the structure of the protective structure 26 can be made relatively simple.

[0366] Specifically, refer to Fig.10 As shown, along the direction perpendicular to the paper surface, the cross-sectional shape of the protection structure 26 is a "T" shape.

[0367] In one embodiment, referring to Fig.11 As shown, the protective structure 26 includes a third subdivision 263, a first subdivision 261, and a second subdivision 262 which are sequentially stacked on the edge portion 2112. The third subdivision 263 protrudes from the side wall of the first subdivision 261 at two opposite ends along the first direction X. The second subdivision 262 protrudes from the side wall of the first subdivision 261 at two opposite ends along the first direction X. The first direction X is perpendicular to the thickness direction of the substrate 1. The protruding portion of the third subdivision 263, the first subdivision 261, and the protruding portion of the second subdivision 262 define a recess 26a. In this way, the contact area between the protective structure 26 and the encapsulation layer 24 can be made larger, which is conducive to improving the adhesion stability of the protective structure 26 and the encapsulation layer 24.

[0368] Specifically, refer to Fig.11As shown, along the direction perpendicular to the paper surface, the cross-sectional shape of the protective structure 26 is an “I” shape.

[0369] In one embodiment, the material of the third section 263 is the same as the material of the second section 262 .

[0370] In one embodiment, the material of the third section 263 is different from the material of the first section 261 .

[0371] In one embodiment, the material of the third section 263 includes titanium, and the material of the first section 261 includes aluminum.

[0372] That is, the protective structure 26 is a structure composed of three layers of titanium, aluminum and titanium. In this way, the laminated metal can be side-engraved to form the protective structure 26. It is understandable that the protective structure 26 can also be composed of laminated metals of other materials.

[0373] It is understandable that the material of the protection structure 26 can be an inorganic material, so as to improve the adhesion between the packaging layer 24 and the protection structure 26, thereby improving the packaging reliability.

[0374] In one embodiment, the driving layer group 21 includes a substrate 211 and a functional layer group disposed on the substrate 211. The substrate 211 is provided with a main body 2111 and an edge portion 2112. Thus, after the substrate 211 is manufactured, the edge of the substrate 211 is thinned to form the edge portion 2112, and the area that is not thinned is the main body 2111.

[0375] Furthermore, the encapsulation layer 24 also covers the side surface of the functional layer group. That is, the encapsulation layer 24 extends toward the edge portion 2112 and covers the side surface of the functional layer group on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0376] In one embodiment, the functional layer group includes a barrier layer 217 and a buffer layer 218 which are stacked, and the barrier layer 217 is located between the substrate 211 and the buffer layer 218. The encapsulation layer 24 also covers the side surfaces of the barrier layer 217 and the buffer layer 218. That is, the encapsulation layer 24 extends toward the edge portion 2112, and covers the side surfaces of the barrier layer 217 and the buffer layer 218 on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0377] In one embodiment, the functional layer group further includes a gate insulating layer 215 disposed on the side of the buffer layer 218 away from the substrate 211, and the encapsulation layer 24 also covers the side surface of the gate insulating layer 215. That is, the encapsulation layer 24 extends toward the edge portion 2112, and covers the side surface of the gate insulating layer 215 on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0378] In one embodiment, the functional layer group further includes a capacitor insulating layer 216 disposed on the side of the gate insulating layer 215 away from the substrate 211, and the encapsulation layer 24 also covers the side surface of the capacitor insulating layer 216. That is, the encapsulation layer 24 extends toward the edge portion 2112, and covers the side surface of the capacitor insulating layer 216 on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0379] In one embodiment, the functional layer group further includes an interlayer insulating layer 212 disposed on the side of the capacitor insulating layer 216 away from the substrate 211, and the encapsulation layer 24 also covers the side surface of the interlayer insulating layer 212. That is, the encapsulation layer 24 extends toward the edge portion 2112, and covers the side surface of the interlayer insulating layer 212 on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0380] In one embodiment, the functional layer group further includes a planarization layer 213 disposed on the side of the interlayer insulating layer 212 away from the substrate 211, and the encapsulation layer 24 also covers the side surface of the planarization layer 213. That is, the encapsulation layer 24 extends toward the edge portion 2112, and covers the side surface of the planarization layer 213 on the extension path. In this way, the contact area of ​​the encapsulation layer 24 can be increased, thereby improving the encapsulation reliability of the encapsulation layer 24.

[0381] It should be noted that the stretchable display panel 100 provided in the third aspect may also include other features of the stretchable display panel 100 in the first aspect, or may also include other features of the stretchable display panel 100 in the second aspect, which will not be repeated in the embodiments of the present application.

[0382] In a fourth aspect, an embodiment of the present application provides a display device, comprising the stretchable display panel in any embodiment of the first aspect, the second aspect or the third aspect.

[0383] The display device can be a smart wearable display device, a laptop computer, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a television monitor, a flat panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, etc.

[0384] The display device provided in the embodiment of the present application can, on the one hand, slow down the tendency of cracks to extend toward the light-emitting unit, and on the other hand, increase the contact area of ​​the encapsulation layer, thereby improving the overall encapsulation reliability and further increasing the service life of the display device.

[0385] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0386] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0387] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A stretchable display panel, characterized in that: include: substrate; A plurality of pixel islands are arranged on the substrate at intervals; The pixel island has a light-emitting area and a non-light-emitting area adjacent to the light-emitting area; The pixel island comprises: A driving layer group, disposed on the substrate; A pixel defining structure is provided on the driving layer group; the pixel defining structure defines a pixel opening located in the light-emitting area; the pixel defining structure is further provided with at least one groove located in the non-light-emitting area on a side away from the driving layer group, the groove passing through the pixel defining structure and a part of the driving layer group along the thickness direction of the substrate; a light emitting unit, disposed in the pixel opening; and The packaging layer covers a side of the light emitting unit away from the substrate and a groove wall of the groove.

2. The stretchable display panel according to claim 1, characterized in that: The driving layer group includes an inorganic film layer and an organic film layer, and the inorganic film layer is arranged between the substrate and the organic film layer; The groove at least penetrates the organic film layer so as to expose a portion of the inorganic film layer; The encapsulation layer covers the exposed surface of the inorganic film layer; Optionally, the groove runs through a portion of the inorganic film layer; Optionally, the driving layer group includes an interlayer insulating layer and a planarization layer, the interlayer insulating layer is located between the substrate and the planarization layer, the interlayer insulating layer is the inorganic film layer, and the planarization layer is the organic film layer; the groove passes through the planarization layer and part of the interlayer insulating layer.

3. The stretchable display panel according to claim 2, characterized in that: The stretchable display panel further includes a connecting line, wherein the connecting line connects adjacent pixel islands; the driving layer group includes a routing line, wherein the routing line is electrically connected to the connecting line; Optionally, the routing includes a first routing portion and a second routing portion, one end of the second routing portion is electrically connected to the first routing portion, and the other end is electrically connected to the connecting wire; the first routing portion and the second routing portion are arranged in different layers; Optionally, the first routing portion is located between the interlayer insulating layer and the planarization layer; Optionally, the driving layer group further includes a gate insulating layer and a capacitor insulating layer, the gate insulating layer and the capacitor insulating layer are located between the substrate and the interlayer insulating layer, and the gate insulating layer is located between the substrate and the capacitor insulating layer; The second wiring portion is located between the gate insulating layer and the capacitor insulating layer; Optionally, the driving layer group further includes a gate, the gate is located between the gate insulating layer and the capacitor insulating layer, and the second wiring portion is arranged in the same layer as the gate; Optionally, a partial orthographic projection of the second wiring portion on the substrate coincides with an orthographic projection of the groove on the substrate; Optionally, the first wiring portion and the second wiring portion are electrically connected through a first via structure; Optionally, a partial orthographic projection of the first wiring portion on the substrate coincides with an orthographic projection of the second wiring portion on the substrate; Optionally, the routing line further includes a third routing line portion, the third routing line portion is electrically connected to the second routing line portion and the connecting line; the third routing line portion and the second routing line portion are arranged in different layers; Optionally, the third routing portion is arranged on the same layer as the first routing portion; Optionally, the third routing portion and the second routing portion are electrically connected through a second via structure; Optionally, a partial orthographic projection of the third routing portion on the substrate coincides with an orthographic projection of the second routing portion on the substrate.

4. The stretchable display panel according to any one of claims 1 to 3, characterized in that: The orthographic projection of the encapsulation layer on the pixel defining structure covers the groove; Optionally, a plurality of grooves are provided on the pixel defining structure, the plurality of grooves are arranged at intervals in the non-luminous area, and the encapsulation layer covers groove walls of the plurality of grooves; Optionally, the non-luminous area is arranged around the periphery of the luminous area, and the groove is arranged around the periphery of the luminous area; Optionally, the orthographic projection of the groove on the substrate is a closed ring-shaped figure; Optionally, the groove includes a plurality of first groove sections, and the plurality of first groove sections are arranged at intervals around the periphery of the light-emitting area; Optionally, in two adjacent grooves, each of the grooves includes a plurality of the first groove segments; in the same groove, there is a gap between two adjacent first groove segments; in two adjacent grooves, the gap of one groove is opposite to the first groove segment of the other groove; Optionally, the groove includes a first main groove and a plurality of first sub-grooves; the orthographic projection of the first main groove on the substrate is a closed ring-shaped figure, and the first main groove is arranged around the periphery of the light-emitting area; the plurality of first sub-grooves are arranged around the periphery of the light-emitting area at intervals, and a part of the orthographic projection of the first sub-groove on the substrate coincides with the orthographic projection of the first main groove on the driving layer group; Optionally, the first sub-groove has a first end and a second end that are oppositely disposed, the first end is located at a side of the first main groove close to the light-emitting area, and the second end is located at a side of the first main groove away from the non-light-emitting area; Optionally, a dimension of an orthographic projection of the groove on the substrate along a first direction is a first width W1, a distance between two adjacent grooves is a first spacing L1, and the first width W1 is greater than or equal to the first spacing L1; The first direction is perpendicular to the thickness direction of the substrate, and perpendicular to the length direction of the orthographic projection of the groove on the substrate.

5. The stretchable display panel according to any one of claims 1 to 3, characterized in that: The driving layer group includes a main body and an edge portion connected to the main body; the pixel defining structure and the light emitting unit are both arranged on the main body; At least one protective structure is disposed on the edge portion, the protective structure has at least one concave portion, and the encapsulation layer also covers the wall surface of the concave portion; Optionally, along the thickness direction of the substrate, the size of the main body portion is greater than the size of the edge portion; Optionally, the encapsulation layer also covers the side surface of the pixel defining structure and the side surface of the main body; Optionally, the edge portion is disposed around the periphery of the main body portion, and the protective structure is disposed around the periphery of the main body portion; Optionally, a plurality of protective structures arranged at intervals are provided on the edge portion, and the encapsulation layer covers a recess of each of the protective structures; Optionally, of the two adjacent protective structures, one protective structure is disposed around the periphery of the main body, and the other protective structure is disposed around the periphery of the one protective structure; Optionally, the protective structure includes a plurality of substructures, and the plurality of substructures are arranged at intervals around the periphery of the main body; Optionally, in two adjacent protective structures, each of the protective structures includes a plurality of substructures, and in the same protective structure, there is a gap between two adjacent substructures; in two adjacent protective structures, the gap of one protective structure is opposite to the substructure of the other protective structure; Optionally, a dimension of an orthographic projection of the protective structure on the substrate along the first direction is a second width W2, a distance between two adjacent protective structures is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2; The first direction is perpendicular to the thickness direction of the substrate and perpendicular to the length direction of the protection structure.

6. The stretchable display panel according to claim 5, characterized in that: The protective structure has a plurality of recesses, and the encapsulation layer covers the wall surfaces of the plurality of recesses; Optionally, the protective structure has two recesses, and the openings of the two recesses are opposite to each other; Optionally, the protective structure comprises a first sub-section and a second sub-section which are sequentially stacked on the edge portion, and opposite ends of the second sub-section along a first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate; The first sub-portion, the protruding portion of the second sub-portion, and the edge portion define the recess; Optionally, the protective structure comprises a third sub-section, a first sub-section and a second sub-section which are sequentially stacked on the edge portion; opposite ends of the third sub-section along a first direction protrude from a side wall of the first sub-section; opposite ends of the second sub-section along the first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate; The protruding portion of the third section, the protruding portions of the first section, and the second section define the recess; Optionally, the material of the third section is the same as that of the second section; Optionally, the material of the third section is different from that of the first section; Optionally, the material of the third section includes titanium, and the material of the first section includes aluminum.

7. A stretchable display panel, characterized in that: include: substrate; as well as A plurality of pixel islands are arranged on the substrate at intervals; The pixel island has a light-emitting area and a non-light-emitting area adjacent to the light-emitting area; The pixel island comprises: A driving layer group, disposed on the substrate; A light-emitting unit, disposed on the driving layer group and located in the light-emitting area; an encapsulation auxiliary structure, disposed on the driving layer group and located in the non-luminescent area; at least one groove is disposed on a side of the encapsulation auxiliary structure away from the driving layer group; the encapsulation auxiliary structure comprises an inorganic material; and The packaging layer covers a side of the light emitting unit away from the substrate and a groove wall of the groove.

8. The display panel according to claim 7, characterized in that: A plurality of grooves arranged at intervals are arranged on a side of the encapsulation auxiliary structure away from the driving layer group, and the encapsulation layer covers the groove walls of the plurality of grooves; Optionally, the orthographic projection of the encapsulation layer on the substrate covers the orthographic projection of the groove on the substrate; Optionally, the encapsulation auxiliary structure is disposed around the periphery of the light-emitting area, and the groove is disposed around the periphery of the light-emitting area; Optionally, the orthographic projection of the groove on the substrate is a closed ring-shaped figure; Optionally, the groove includes a plurality of second groove segments, and the plurality of second groove segments are arranged at intervals around the periphery of the light-emitting area; Optionally, in two adjacent grooves, each groove includes a plurality of second groove segments; in the same groove, there is a gap between two adjacent second groove segments; in two adjacent grooves, the gap of one groove is opposite to the second groove segment of the other groove; Optionally, the groove includes a second main groove and a plurality of second sub-grooves; the orthographic projection of the second main groove on the substrate is a closed ring-shaped figure, and the second main groove is arranged around the periphery of the light-emitting area; The plurality of second sub-grooves are arranged at intervals around the periphery of the light-emitting area, and a partial orthographic projection of the second sub-grooves on the substrate coincides with an orthographic projection of the second main groove on the substrate; Optionally, the second sub-groove has a third end and a fourth end that are arranged opposite to each other, the third end is located at a side of the second main groove close to the light-emitting area, and the fourth end is located at a side of the second main groove away from the non-light-emitting area; Optionally, a dimension of an orthographic projection of the groove on the substrate along the first direction is a third width W3, a distance between two adjacent grooves is a third spacing L3, and the third width W3 is greater than or equal to the third spacing L3; The first direction is perpendicular to the thickness direction of the substrate and perpendicular to the length direction of the orthographic projection of the groove on the substrate.

9. The stretchable display panel according to claim 7, characterized in that: The packaging auxiliary structure is provided with at least one protrusion on one side close to the driving layer group, and the driving layer group is provided with at least one recess on one side close to the packaging auxiliary structure, and the at least one protrusion is embedded with the at least one recess; Optionally, a side of the auxiliary packaging structure close to the driving layer group is provided with a plurality of convex parts arranged at intervals, and a side of the driving layer group close to the auxiliary packaging structure is provided with a plurality of concave parts, and the plurality of convex parts and the plurality of concave parts are embedded in a one-to-one correspondence; Optionally, a plurality of grooves arranged at intervals are provided on the packaging auxiliary structure, and an orthographic projection of one of the grooves on the driving layer group coincides with an orthographic projection of one of the protrusions on the driving layer group; Optionally, the plurality of grooves correspond to the plurality of protrusions one by one, and an orthographic projection of each groove on the driving layer group coincides with an orthographic projection of a corresponding protrusion on the driving layer group; Optionally, the driving layer group includes a planarization layer, and the recessed portion is arranged on a surface of the planarization layer on a side away from the substrate; Optionally, along the thickness direction of the substrate, the size of the recessed portion is H1, the size of the planarization layer is H2, and H1 and H2 satisfy the relationship: H1≤0.5H2.

10. The stretchable display panel according to claim 7, characterized in that: The surface of one side of the packaging auxiliary structure close to the driving layer group is a plane; Optionally, the stretchable display panel comprises a pixel defining structure, wherein the pixel defining structure is disposed on the driving layer group, and the pixel defining structure defines a pixel opening located in the light emitting area; The light emitting unit is disposed in the pixel opening; A surface of one side of the pixel defining structure close to the driving layer group is flush with a surface of one side of the encapsulation auxiliary structure close to the driving layer group; Optionally, the pixel defining structure is adjacent to the encapsulation auxiliary structure.

11. The stretchable display panel according to any one of claims 7 to 10, characterized in that: The driving layer group includes a main body and an edge portion connected to the main body; the light emitting unit is arranged on the main body; At least one protective structure is disposed on the edge portion, the protective structure has at least one concave portion, and the encapsulation layer also covers the wall surface of the concave portion; Optionally, along the thickness direction of the substrate, the size of the main body portion is greater than the size of the edge portion; Optionally, the stretchable display panel comprises a pixel defining structure, the pixel defining structure is disposed on the main body, and the pixel defining structure defines a pixel opening located in the light emitting area; The light emitting unit is disposed in the pixel opening; The encapsulation layer also covers the side surface of the pixel defining structure and the side surface of the main body; Optionally, the edge portion is disposed around the periphery of the main body portion, and the protective structure is disposed around the periphery of the main body portion; Optionally, a plurality of protective structures arranged at intervals are provided on the edge portion, and the encapsulation layer covers a recess of each of the protective structures; Optionally, of the two adjacent protective structures, one protective structure is disposed around the periphery of the main body, and the other protective structure is disposed around the periphery of the one protective structure; Optionally, the protective structure includes a plurality of substructures, and the plurality of substructures are arranged at intervals around the periphery of the main body; Optionally, in two adjacent protective structures, each of the protective structures includes a plurality of substructures, and in the same protective structure, there is a gap between two adjacent substructures; in two adjacent protective structures, the gap of one protective structure is opposite to the substructure of the other protective structure; Optionally, a dimension of an orthographic projection of the protective structure on the substrate along the first direction is a second width W2, a distance between two adjacent protective structures is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2; The first direction is perpendicular to the thickness direction of the substrate and perpendicular to the length direction of the protection structure.

12. The stretchable display panel according to claim 11, characterized in that: The protective structure has a plurality of recesses, and the encapsulation layer covers the wall surfaces of the plurality of recesses; Optionally, the protective structure has two recesses, and the openings of the two recesses are opposite to each other; Optionally, the protective structure comprises a first sub-section and a second sub-section which are sequentially stacked on the edge portion, and opposite ends of the second sub-section along a first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate; The first sub-portion, the protruding portion of the second sub-portion, and the edge portion define the recess; Optionally, the protective structure comprises a third sub-section, a first sub-section and a second sub-section which are sequentially stacked on the edge portion; opposite ends of the third sub-section along a first direction protrude from a side wall of the first sub-section; opposite ends of the second sub-section along the first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate; The protruding portion of the third section, the protruding portions of the first section, and the second section define the recess; Optionally, the material of the third section is the same as that of the second section; Optionally, the material of the third section is different from that of the first section; Optionally, the material of the third section includes titanium, and the material of the first section includes aluminum.

13. A stretchable display panel, characterized in that: include: substrate; as well as A plurality of pixel islands are arranged on the substrate at intervals; The pixel island comprises: A driving layer group, disposed on the substrate, the driving layer group comprising a main body and an edge portion connected to the main body; A light emitting unit, disposed on the main body; A protective structure, disposed on the edge portion, and having at least one recessed portion; The encapsulation layer covers a side of the light emitting unit away from the substrate and a wall surface of the concave portion.

14. The stretchable display panel according to claim 13, characterized in that: Along the thickness direction of the substrate, the size of the main body portion is larger than the size of the edge portion; Optionally, the stretchable display panel includes a pixel defining structure, the pixel defining structure is disposed on the main body, the pixel defining structure defines a pixel opening located in the light emitting area, and the light emitting unit is disposed in the pixel opening; The encapsulation layer also covers the side surface of the pixel defining structure and the side surface of the main body; Optionally, the edge portion is disposed around the periphery of the main body portion, and the protective structure is disposed around the periphery of the main body portion; Optionally, a plurality of protective structures arranged at intervals are provided on the edge portion, and the encapsulation layer covers a recess of each of the protective structures; Optionally, of the two adjacent protective structures, one protective structure is disposed around the periphery of the main body, and the other protective structure is disposed around the periphery of the one protective structure; Optionally, the protective structure includes a plurality of substructures, and the plurality of substructures are arranged at intervals around the periphery of the main body; Optionally, in two adjacent protective structures, each of the protective structures includes a plurality of substructures, and in the same protective structure, there is a gap between two adjacent substructures; in two adjacent protective structures, the gap of one protective structure is opposite to the substructure of the other protective structure; Optionally, a dimension of an orthographic projection of the protective structure on the substrate along the first direction is a second width W2, a distance between two adjacent protective structures is a second spacing L2, and the second width W2 is greater than or equal to the second spacing L2; The first direction is perpendicular to the thickness direction of the substrate and perpendicular to the length direction of the protection structure.

15. The stretchable display panel according to claim 13, characterized in that: The protective structure has a plurality of recesses, and the encapsulation layer covers the wall surfaces of the plurality of recesses; The protective structure has two recesses, and the openings of the two recesses are opposite to each other; Optionally, the protective structure comprises a first sub-section and a second sub-section which are sequentially stacked on the edge portion, and opposite ends of the second sub-section along a first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate; The first sub-portion, the protruding portion of the second sub-portion, and the edge portion define the recess; Optionally, the protective structure comprises a third sub-section, a first sub-section and a second sub-section which are sequentially stacked on the edge portion; opposite ends of the third sub-section along a first direction protrude from a side wall of the first sub-section; opposite ends of the second sub-section along the first direction protrude from a side wall of the first sub-section; the first direction is perpendicular to a thickness direction of the substrate; The protruding portion of the third section, the protruding portions of the first section, and the second section define the recess; Optionally, the material of the third section is the same as that of the second section; Optionally, the material of the third section is different from that of the first section; Optionally, the material of the third section includes titanium, and the material of the first section includes aluminum.

16. The stretchable display panel according to claim 13, characterized in that: The driving layer group includes a substrate and a functional layer group arranged on the substrate; the substrate is provided with the main body and the edge portion; the encapsulation layer also covers the side surface of the functional layer group; Optionally, the functional layer group includes a barrier layer and a buffer layer which are stacked, and the barrier layer is located between the substrate and the buffer layer; the encapsulation layer also covers the side surfaces of the barrier layer and the buffer layer; Optionally, the functional layer group further includes a gate insulating layer disposed on a side of the buffer layer away from the substrate, and the encapsulation layer further covers a side surface of the gate insulating layer; Optionally, the functional layer group further includes a capacitor insulating layer disposed on a side of the gate insulating layer away from the substrate, and the encapsulation layer further covers a side surface of the capacitor insulating layer; Optionally, the functional layer group further includes an interlayer insulating layer disposed on a side of the capacitor insulating layer away from the substrate, and the encapsulation layer further covers a side surface of the interlayer insulating layer; Optionally, the functional layer group further includes a planarization layer disposed on a side of the interlayer insulating layer away from the substrate, and the encapsulation layer also covers a side surface of the planarization layer.

17. A display device, characterized in that: Comprising a stretchable display panel as described in any one of claims 1-16.

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