Display panel and display device

Abstract

The utility model provides a display panel and a display device. Specifically, the display panel comprises at least one display island; the display island comprises a display area and a peripheral area surrounding the display area; the display island comprises a first substrate and a second packaging layer located on the first substrate; the peripheral area comprises at least one accommodating groove; and the second packaging layer fills the accommodating groove. With the adoption of the technical method, the accommodating groove is formed, so that the accommodating groove is filled with the redundant material for forming the second packaging layer, and the situation that the redundant material spreads to the hollow area between the display island and the connecting bridge to damage the tensile property of the device is avoided.

Description

Technical Field

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

[0002] Stretchable display technology is considered to be the next generation of flexible display technology after foldable display technology, and has broad application prospects in wearable devices, automotive displays and other fields. In order to achieve the stretchability of display devices, the device is usually designed as an "island-bridge structure", that is, the internal structure of the device is divided into a rigid display island and an elastic connecting bridge. The connecting bridge is prepared with a serpentine metal wire, which deforms without breaking when subjected to external tension, thus making the organic light-emitting device as a whole have a certain degree of stretchability. The packaging method of the display island has a significant impact on the performance and life of the organic light-emitting device, and the packaging effect of related packaging technologies is difficult to meet the requirements. Utility Model Content

[0003] In view of this, an object of the present disclosure is to provide a display panel and a display device.

[0004] Based on the above objectives, the present disclosure provides a display panel, the display panel comprising at least one display island; the display island comprising a display area and a peripheral area surrounding the display area;

[0005] The display island includes a first substrate and a second encapsulation layer located on the first substrate;

[0006] The peripheral area includes at least one receiving groove; the second packaging layer fills the receiving groove.

[0007] Based on the same inventive concept, an embodiment of the present disclosure further provides a display device, comprising any of the aforementioned display panels.

[0008] As can be seen from the above description, the present disclosure provides a display panel and display device. Specifically, the display panel includes at least one display island; the display island includes a display area and a peripheral area surrounding the display area; the display island includes a first substrate and a second encapsulation layer located on the first substrate; the peripheral area includes at least one receiving groove; and the second encapsulation layer fills the receiving groove. Using this technical method, by providing a receiving groove, excess material forming the second encapsulation layer is filled in the receiving groove, preventing excess material from spreading to the hollow area between the display island and the connecting bridge and damaging the tensile properties of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1A A partial structural schematic diagram of a stretchable display panel provided by the related art is shown;

[0011] Figure 1B A partial structural cross-sectional view of a stretchable display panel provided by the related art is shown;

[0012] Figure 1C A partial structural diagram of another stretchable display panel provided by the related art is shown;

[0013] Figure 2A A partial structural schematic diagram of a stretchable display panel provided by an embodiment of the present disclosure is shown;

[0014] Figure 2B A partial structural schematic diagram of another stretchable display panel provided by an embodiment of the present disclosure is shown;

[0015] Figure 2C Show Figure 2A Schematic diagram of the cross section along line A-A';

[0016] Figure 2D Show Figure 2A An enlarged view of the middle dotted box B;

[0017] Figure 2E Show Figure 2A Another enlarged view of the middle dashed box B;

[0018] Figure 2F Show Figure 2A Another enlarged view of the middle dashed box B;

[0019] Figure 2G Show Figure 2A Another schematic cross-sectional view along line A-A';

[0020] Figure 2H Show Figure 2A Another schematic cross-sectional view along line A-A';

[0021] Figure 2I Show Figure 2A Another schematic cross-sectional view along line A-A';

[0022] Figure 2J A partial structural schematic diagram of another stretchable display panel provided by an embodiment of the present disclosure is shown;

[0023] Figure 2K Show Figure 2J A schematic cross-sectional view along line A-A';

[0024] Figures 3A to 3E Show Figure 2C A schematic cross-sectional view of an intermediate structure of a method for manufacturing a stretchable display panel;

[0025] Figure 4A-4B Show Figure 2G A schematic cross-sectional view of an intermediate structure of a method for manufacturing a stretchable display panel;

[0026] Figures 5A to 5E Show Figure 2K Schematic cross-sectional view of the intermediate structure of the method for manufacturing a stretchable display panel. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should have the usual meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0029] In the drawings, the thickness and shape of some layers and regions may be exaggerated for better understanding and ease of description. When terms such as "on," "above," "below," and "next to" are used to describe the positional relationship between two components, one or more components may be located between the two components unless these terms are used with the terms "immediately thereon" or "directly thereto." When an element or layer is disposed "on" another element or layer, the additional layer or element may be directly inserted on or between the other element.

[0030] Figure 1A A partial structural schematic diagram of a stretchable display panel provided by related technology is shown. Figure 1A Two rigid display islands 100 and 100' are depicted. Each display island 100 and 100' includes a display area D1 and a peripheral area D2 surrounding the display area D1. The display area D1 may include at least one pixel unit. Each pixel unit may include three pixel sub-units, each displaying red, blue, and green, respectively. For example, the light-emitting device of each pixel sub-unit may be an organic light-emitting diode (OLED).

[0031] The two display islands 100, 100' are connected by a flexible bridge D3, which is equipped with a serpentine metal wire. A hollow region D4 exists between bridge D3 and the display islands 100, 100'. Due to the hollow region D4 and the serpentine metal wire, bridge D3 can deform without breaking when subjected to external tension.

[0032] As described in the background art, the packaging structure of the display islands 100 and 100 ′ has a significant impact on the performance and lifespan of the display panel. Figure 1B A partial structural cross-sectional view of a stretchable display panel provided by the related art is shown. Figure 1B As can be seen, the display islands include a driver layer 101 and a light-emitting film layer 102 located above the driver layer 101. The connecting bridge D3 includes a metal wire layer 112. An inorganic thin film layer 118 is provided on the light-emitting film layer 102 and the metal wire layer 112 to encapsulate the display islands and connecting bridge D3. Due to the thinness of the inorganic thin film layer 118, it is difficult to encapsulate large particles. When pressure is applied to the top of the display panel, particles can easily penetrate the inorganic thin film layer 118, causing water and oxygen intrusion and causing the light-emitting device to fail.

[0033] The related technology also provides a replaceable packaging method. Figure 1C The following is a partial structural diagram of another stretchable display panel provided by the related art. Figure 1C As shown, a stacked first encapsulation layer 118, a second encapsulation layer 120, and a third encapsulation layer 121 are provided on the light-emitting film layer 102. The first encapsulation layer 118 and the third encapsulation layer 121 are formed of inorganic materials; the second encapsulation layer 120 is formed of organic materials. Although the three-layer encapsulation structure can effectively encapsulate the particles, it will affect the tensile performance of the display panel. This is because the second encapsulation layer 120 is usually produced by inkjet printing, the display island area is small, and the ink droplets sprayed by the inkjet printer are too large. The organic ink easily overflows into the hollow area D4 of the stretchable display device. After the ink is solidified, it is easy to cause the connecting bridge D3 and the display island to adhere, causing the metal wire layer 112 in the connecting bridge D3 to lose its elasticity, affecting the tensile performance of the display panel.

[0034] In view of this, embodiments of the present disclosure provide a display panel and a display device. Specifically, the display panel includes at least one display island; the display island includes a display area and a peripheral area surrounding the display area; the display island includes a first substrate and a second encapsulation layer located on the first substrate; the peripheral area includes at least one receiving groove; and the second encapsulation layer fills the receiving groove. This technical solution, by providing a receiving groove, allows excess material forming the second encapsulation layer to fill the receiving groove, preventing the excess material from spreading into the hollow area between the display island and the connecting bridge, thereby damaging the tensile properties of the device.

[0035] Figure 2A A partial structural schematic diagram of a stretchable display panel provided by an embodiment of the present disclosure is shown. Figure 2B The present invention provides a partial structural diagram of another stretchable display panel. The display island 200 includes a display area D1 and a peripheral area D2 surrounding the display area D1. The display area D1 includes at least one pixel unit, for example, the display area D1 includes a pixel unit (such as Figure 2A As shown), the display area D1 includes two pixel units (as shown Figure 2B See Figure 2A and Figure 2B As shown, the peripheral area D2 of the display island 200 is provided with a receiving groove area D5. The provision of receiving groove area D5 increases the volume of the ink liquid that can be contained in the display island 200. Furthermore, the peripheral area D2 is provided with a barrier dam area D6 on the side of the receiving groove area D5 away from the display area D1. The barrier dam area D6 blocks the ink, preventing it from overflowing into the hollow area of ​​the stretchable display panel, thereby ensuring the stretchability of the display panel while improving the reliability of the packaging.

[0036] Figure 2C Show Figure 2A Schematic diagram of the cross section along line AA'. Figure 2G Show Figure 2A Another schematic cross-sectional view along line A-A'; Figure 2H Show Figure 2A Another schematic cross-sectional view along line A-A'; Figure 2I Show Figure 2A Another schematic cross-sectional view along line A-A'; Figure 2K Show Figure 2J A schematic diagram of a cross section along line A-A'. Figure 2C 、 Figure 2G 、 Figure 2H 、 Figure 2I 、 Figure 2K , the structure of the display panel is described in detail.

[0037] The display panel includes two substrates, namely an elastic substrate 201 (corresponding to the second substrate) and a flexible substrate 203 (corresponding to the first substrate). An optical adhesive layer 202 is provided between the elastic substrate 201 and the flexible substrate 203. Exemplarily, the material of the elastic substrate 201 can be polydimethylsiloxane (PDMS). Exemplarily, the material of the flexible substrate 203 can be polyimide (PI). A driving layer, a light-emitting film layer, and an encapsulation film layer are provided on the flexible substrate 203 located in the display area D1.

[0038] In some embodiments, a barrier layer 204 and a buffer layer 205 are provided on the side of the flexible substrate 203 away from the elastic substrate 201, and the drive layer is provided on the side of the buffer layer 205 away from the substrate 203. The barrier layer 204 can be made of a metal oxide such as aluminum oxide or zirconium oxide; the buffer layer 205 can be made of SiO2 or SiN, etc., which are not limited in this disclosure.

[0039] Furthermore, the driving layer includes an active layer 206 (actrive layer), a first insulating layer 207 (gate insulator), a first gate layer 208, a second insulating layer 209 (gate insulator), a second gate layer 210, a third insulating layer 211 (inter-layer dielectric, abbreviated as ILD) and a source-drain layer 212 (corresponding to the first electrode layer). Among them, the first insulating layer 207 covers the active layer 206; the second insulating layer 209 covers the first gate layer 208, the third insulating layer 211 covers the second gate layer 210, and the source-drain layer 212 conducts the three insulating layers 207, 209, and 211 to connect the active layer 206. It should be noted that the active layer 206, the first gate layer 208, the second gate layer 210, and the source-drain layer 212 can form at least one thin film transistor (TFT). Those skilled in the art can select suitable materials to form the driving layer, and this disclosure is not limited to this.

[0040] In some embodiments, a first planar layer 213 is disposed on the source / drain electrode layer 212 and the third insulating layer 211. It should be noted that the first planar layer 213 exposes at least a portion of the source / drain electrode layer 212 so that the thin film transistors of the driving layer can control the light emitting devices in the light emitting film layer.

[0041] Furthermore, if Figure 2C 、 Figure 2G 、 Figure 2H 、 Figure 2I 、 Figure 2KAs shown, the light-emitting film layer includes a second electrode layer 214 (corresponding to the anode layer), a pixel definition layer 215, a light-emitting layer 216, and a third electrode layer 217 (corresponding to the cathode layer). Here, the light-emitting layer 216 can be made by chemical vapor deposition or other methods, which is not limited in this disclosure.

[0042] In some embodiments, a first encapsulation layer 218, a second encapsulation layer 220, and a third encapsulation layer 221 are formed on the side of the light-emitting film layer away from the driving layer. Optionally, the materials of the first encapsulation layer 218 and the third encapsulation layer 221 can be inorganic materials, such as SiNx, SiO2, and SiON. The second encapsulation layer 220 can be an organic material, such as polymethyl methacrylate, polycarbonate, polystyrene, and polyethylene terephthalate-1,4-cyclohexane dimethanol.

[0043] Furthermore, the barrier layer 204 , the buffer layer 205 , the first insulating layer 207 , the second insulating layer 209 , the third insulating layer 211 , the first encapsulation layer 218 , the second encapsulation layer 220 and the third encapsulation layer 221 extend to the peripheral region D2 .

[0044] In some embodiments, as Figure 2C As shown, peripheral area D2 is provided with at least one receiving groove 224. Optionally, receiving groove 224 can penetrate first encapsulation layer 218, third insulating layer 211, second insulating layer 209, first insulating layer 207, and buffer layer 205. By providing receiving groove 224, ink forming second encapsulation layer 220 can fill receiving groove 224, thereby increasing the ink holding capacity of display island 200 and preventing ink overflow.

[0045] Here, the number of the receiving grooves 224 can be one or more, and this disclosure does not limit this. For example, the number of the receiving grooves 224 can be one, and the receiving groove 224 extends in a direction surrounding the display area D1. For example, the number of the receiving grooves 224 can be multiple, and their specific arrangement can be flexibly set. Figure 2D Show Figure 2A An enlarged view of the dotted box B. Figure 2D As shown, a plurality of receiving grooves (eg, the first receiving groove 2241 and the second receiving groove 2242 ) may be arranged in a direction away from the display area D1 . Figure 2E Show Figure 2A Another enlarged view of the dotted box B, such as Figure 2E As shown, a plurality of receiving grooves (eg, the first receiving groove 2241 and the second receiving groove 2242 ) may be arranged in a direction surrounding the display area D1 . Figure 2F Show Figure 2A Another enlarged view of the dotted box B, such as Figure 2FAs shown, a plurality of receiving slots (eg, a first receiving slot 2241, a second receiving slot 2242, and a third receiving slot 2243) may be Figure 2D and Figure 2E The present disclosure does not limit the combination of the two arrangements.

[0046] To further reduce the risk of overflow from the second encapsulation layer 220 material, the peripheral area D2 is further provided with at least one barrier dam 219, 225. Specifically, at least one barrier dam 219, 225 is disposed on the side of the receiving groove 224 away from the display area D1. This structural arrangement allows the barrier dams 219, 225 to block the ink, thereby reducing the risk of overflow and ensuring encapsulation quality without affecting the stretchability of the stretchable display panel.

[0047] Optionally, the distance between the highest of the at least one barrier dam 219 and 225 and the flexible substrate 203 is not less than the distance between the second package 220 and the flexible substrate 203. Here, the distance between the second package 220 and the flexible substrate refers to the distance between the surface of the second package layer 220 away from the flexible substrate and the flexible substrate 203.

[0048] Further, if Figure 2C 、 Figure 2G 、 Figure 2H 、 Figure 2I and Figure 2K As shown, the connecting bridge D3 includes a second flat layer 222, a first electrode layer 212, a third flat layer 223, a first encapsulation layer 218, and a third encapsulation layer 221 disposed between the flexible substrates 203. Optionally, the third encapsulation layer 221 can wrap the entire connecting bridge to achieve encapsulation of the connecting bridge.

[0049] A hollow region D4 exists between the connecting bridge D3 and the display islands. The first electrode layer 212 of the connecting bridge D3 extends from the first electrode layer 212 of the display islands, enabling connections between the different display islands. Optionally, the orthographic projection of the first electrode layer 212 on the flexible substrate 203 and the orthographic projection of the receiving groove 224 on the flexible substrate 203 do not overlap. This structure helps ensure that the receiving groove 224 does not interrupt the connection between the display islands. To increase the capacity of the receiving groove 224, the receiving groove 224 is provided around the display area D1, except for the area where the first electrode layer 212 is routed.

[0050] In some alternative embodiments, such as Figure 2G As shown, the first encapsulation layer 218 is not penetrated by the receiving groove 224, but extends to the sidewalls and bottom of the receiving groove 224. In this structure, the first encapsulation layer 218 covers the receiving groove 224, which can extend the path for water vapor to invade from the side and optimize the encapsulation effect.

[0051] In some alternative embodiments, such as Figure 2H As shown, the first encapsulation layer 218 may cover the barrier dam 219 , which can also extend the intrusion path of water vapor and improve the reliability of the device.

[0052] In some alternative embodiments, such as Figure 2I As shown, the first encapsulation member 218 not only extends to the sidewalls and the bottom of the receiving groove 224 , but also covers and wraps the barrier dam 219 , thereby enhancing the encapsulation effect of the display island.

[0053] Figure 2C 、 Figure 2G to Figure 2I In the cross-sectional view of the display panel shown, the barrier dam 219 and the receiving groove 224 are two independent structures, resulting in a wider peripheral area of ​​the display island. In order to reduce the package frame, the embodiment of the present disclosure also provides an alternative embodiment.

[0054] Figure 2J FIG. 1 shows a partial structural diagram of another stretchable display panel provided by an embodiment of the present disclosure. Figure 2J As shown, peripheral region D2 is provided with only barrier dam region D6, but no receiving groove region D5. By providing multiple barrier dams in barrier dam region D6, with adjacent barrier dams at least partially embedded to form receiving grooves, a separate receiving groove region is not required, thereby achieving the technical effect of reducing the package frame.

[0055] Further, if Figure 2K As shown, the at least one barrier dam includes a first barrier dam 219 and a second barrier dam 225. The first barrier dam 219 is at least partially embedded in the second barrier dam 225, with a certain space between the first barrier dam 219 and the second barrier dam 225. The space between the first barrier dam 219 and the second barrier dam 225 forms a receiving groove 224 for accommodating excess material of the second encapsulation layer 220. For example, the first barrier dam 219 and the second barrier dam 225 can be arranged in a direction perpendicular to the flexible substrate 203. This approach can minimize the package border.

[0056] Figures 3A to 3E Show Figure 2C The cross-sectional diagram of the intermediate structure of the manufacturing method of the stretchable display panel is shown below. Figures 3A to 3E As shown, Figure 2C The method for manufacturing the stretchable display panel shown is exemplified.

[0057] first, Figure 3AThe display island, connecting bridge, and hollowed-out area are shown. The drive layer and portions of the light-emitting film layers 214 and 215 on the display island have already been fabricated, while the first electrode layer 212 and multiple planar layers 222 and 223 on the connecting bridge have already been fabricated. The fabrication of the drive layer and portions of the light-emitting film layers can be flexibly selected as needed and is not limited in this disclosure. The hollowed-out area in the stretchable display bread is formed by removing the material between the connecting bridge and the display island through an etching process.

[0058] It should be noted that the flexible substrate 203 is disposed on the glass substrate 226 .

[0059] Next, Figure 3A In the structure shown, the light emitting layer 216 and the cathode layer 217 are prepared by evaporation process, and then the first encapsulation film layer 218 (Thin Film Encapsulation, referred to as TFE) is deposited. Figure 3B shown.

[0060] Optionally, the first packaging film layer 218 may be deposited by chemical vapor deposition (CVD), atomic layer deposition (ALD), etc., and its composition may be SiN x , SiO2, SiON, etc., are used to block water vapor and optimize the spreading of inkjet-printed organic layers on the device.

[0061] Considering the etching in the subsequent process, the first packaging film layer 218 is preferably a single-component film layer to reduce the difficulty of etching.

[0062] Then, an opening is formed on the edge side of the display island, i.e., the peripheral area, by etching to pass through the first packaging film layer 218, the third insulating layer 211, the second insulating layer 209, the first insulating layer 207 and the buffer layer 5, which is called the overflow receiving groove 224. Figure 3C shown.

[0063] Optionally, except for the wiring area (here, the area where the first electrode layer 212 extends to the connecting bridge), the overflow receiving groove 224 surrounds the entire display island.

[0064] Next, a barrier dam 219 is prepared on the outermost side of the display island to further prevent the ink from overflowing. Figure 3C shown.

[0065] Compared to the three-layer package in the related art, the height of the barrier dam 219 in the stretchable display device provided by the present embodiment can be appropriately reduced to improve structural stability. Depending on the display island size and film thickness, the volume of the overflow containment groove 224 ranges from 1 to 20 pL, for example, 5 pL, 10 pL, 12 pL, 15 pL, 18 pL, 20 pL, etc. Given that the droplet size of an inkjet printhead is approximately 10 pL, the presence of the overflow containment groove 224 can effectively contain the droplets and reduce the risk of overflow.

[0066] Then, the second encapsulation layer 220 and the third encapsulation layer 221 are formed. The second encapsulation layer 220 is formed by inkjet printing and is made of acrylic materials such as polymethyl methacrylate, polycarbonate, polystyrene and polyethylene terephthalate-1,4-cyclohexane dimethanol, etc., to prevent particles from damaging the functional layer. Figure 3D shown.

[0067] In some embodiments, the third encapsulation layer 221 is prepared by CVD, ALD, etc., and its composition is SiN x , SiO2, SiON or a combination of several layers to block the intrusion of water vapor.

[0068] Finally, the flexible substrate 203 and the structure above it are separated from the glass substrate 226 by a laser lift-off process (Laser Lift-off, LLO for short), and then the flexible substrate 203 is bonded to the elastic substrate 201 coated with the optical adhesive layer 202, thereby completing the preparation of the stretchable display panel. Figure 3E shown.

[0069] Figure 4A-4B Show Figure 2G Schematic cross-sectional view of the intermediate structure of the method for manufacturing a stretchable display panel.

[0070] like Figure 4A As shown, before manufacturing the first packaging film layer 218, an overflow receiving groove 224 surrounding the inner circle of the display island is formed by an etching process, and then a blocking dam 219 is prepared by coating, exposing, and developing.

[0071] Next, the light emitting layer 216 and the cathode layer 217 are formed on the display island by evaporation, and then the first encapsulation layer 218, the second encapsulation layer 220, and the third encapsulation layer 221 are formed by CVD, ALD, inkjet printing, etc. Figure 4B shown.

[0072] The first encapsulation layer 218 and the third encapsulation layer 221 are prepared by CVD, ALD and the like, and the composition is SiN x, SiO2, SiON or a combination of several layers is used to block the intrusion of water vapor. The material of the second encapsulation layer 220 is as described above and is used to block particles.

[0073] Finally, the step of peeling off the flexible substrate 203 and the structure thereon from the glass substrate 226 is as described above and will not be repeated herein.

[0074] In such a display panel, the first encapsulation layer 218 covers the overflow receiving groove 224 formed by etching, which can extend the path for water vapor to invade from the side and optimize the encapsulation effect.

[0075] for Figure 2H 、 Figure 2I The method for manufacturing the display panel can be obtained by adjusting the manufacturing sequence of the first encapsulation layer 218 and the receiving groove 224, which will not be described in detail in this disclosure.

[0076] Figures 5A to 5E Show Figure 2K A schematic cross-sectional view of an intermediate structure of a method for manufacturing a stretchable display panel. First, Figure 5A and Figure 3A Similar, no further details.

[0077] Next, a first barrier dam 219 and a sacrificial layer 227 (SL) are prepared in the area between the edge of the display island and the outside of the display area, that is, the peripheral area. Figure 5B shown.

[0078] Optionally, the first barrier dam 219 is prepared by coating, exposing, and developing, and may be made of an organic adhesive. The sacrificial layer 227 is composed of an easily sublimable organic material (e.g., 8-hydroxyquinoline aluminum, abbreviated as Alq3), or a metal material that is easily wet-etched (e.g., Cu, Mo, and Al). It should be noted that the metal material of the sacrificial layer 227 cannot be etched with the same etchant as indium tin oxide (ITO), and can be prepared by evaporation or physical vapor deposition (PVD).

[0079] Then, the second barrier dam 225 is formed on the outer side of the sacrificial layer 227 by coating, exposing, and developing. Figure 5C As shown. The material used for the second barrier dam 225 can be the same as that of Dam1 19, or a similar material that performs the same function, and this disclosure is not limited thereto. It should be noted that the second barrier dam 225 is higher than the first barrier dam 219. Optionally, the first barrier dam 219 is at least partially embedded in the second barrier dam 225.

[0080] Next, the sacrificial layer 227 is removed. If the material of the sacrificial layer 227 is Alq3, the Alq3 is removed by thermal evaporation. If the material of the sacrificial layer 227 is metal, the corresponding etching solution is used to remove it. After removing the sacrificial layer 227, the following is formed: Figure 5C In the illustrated structure, a cavity is formed between the first barrier dam 219 and the second barrier dam 225, forming an overflow trough 224, which allows for a certain amount of inkjet printing ink to be stored, thereby preventing overflow. Optionally, the overflow trough 224 surrounds the entire display island, except for the routing area (corresponding to the area where the first electrode layer extends to the connecting bridge). Optionally, the first barrier dam 219 and the second barrier dam 225 can be arranged substantially vertically, which can reduce the package border compared to a conventional dual barrier dam structure.

[0081] Then, if Figure 5D As shown, the light emitting layer 216 and the cathode layer 217 are prepared in the display area by evaporation process, and then the first encapsulation layer 218 is deposited. This film layer can be deposited by CVD, ALD, etc., and can be composed of SiN x An inorganic film layer made of SiO2, SiON, etc., is used to block water vapor and optimize the spreading of the inkjet-printed organic layer on the device. The second encapsulation layer 221 is then prepared, optionally using inkjet printing, to prevent particles from damaging the functional layer (e.g., the light-emitting layer). After the ink is spread, excess ink flows into the overflow holding groove, preventing it from overflowing into the hollow area.

[0082] Finally, referring to the above, the third package 221 is made, the glass substrate 226 is separated, and the elastic substrate 201 is bonded, as shown in FIG. Figure 5E As shown, no further details are given.

[0083] Based on the same inventive concept, the present disclosure provides a display panel. Figures 2A to 2K As shown, the display panel includes at least one display island 200; the display island 200 includes a display area D1 and a peripheral area D2 surrounding the display area (such as Figure 2A 、 Figure 2J shown);

[0084] The display island 200 includes a first substrate (corresponding to the flexible substrate 203 ) and a second encapsulation layer 220 located on the first substrate;

[0085] The peripheral region D2 includes at least one receiving groove 224 ; the second encapsulation layer 220 fills the receiving groove 224 .

[0086] In some embodiments, the volume of the receiving tank 224 is 1-20 pL.

[0087] In some embodiments, the orthographic projection of the receiving groove 224 on the first substrate extends along the periphery of the orthographic projection of the display area D1 on the first substrate.

[0088] In some embodiments, as Figure 2E and Figure 2F As shown, a plurality of receiving grooves (eg, 2241, 2242) are arranged along a direction surrounding the display area D1; in some embodiments, as shown in FIG. Figure 2D and Figure 2F As shown, a plurality of receiving grooves (eg, 2241 , 2242 or 2241 and 2243 ) are arranged in a direction away from the display area D1 .

[0089] In some embodiments, as Figure 2G As shown, the display island further includes a first encapsulation layer 218 located on a side of the second encapsulation layer 220 close to the first substrate; the first encapsulation layer 218 extends into the receiving groove 224. Optionally, the first encapsulation layer 218 covers the sidewalls and bottom of the receiving groove 224.

[0090] In some embodiments, the display panel further includes a connecting bridge connecting different display islands; the display island further includes a first electrode layer 212; wherein,

[0091] The first electrode layer 212 extends to the connecting bridge; the orthographic projection of the first electrode layer 212 on the first substrate does not overlap with the orthographic projection of the receiving groove 224 on the first substrate. This structure prevents the receiving groove 224 from damaging the connection between the display islands.

[0092] In some embodiments, as Figure 2C 、 Figure 2G to Figure 2I 、 Figure 2K As shown, the peripheral area D2 further includes at least one blocking dam 219 , 225 ; the at least one blocking dam is located on a side of the receiving groove 224 away from the display area D1 .

[0093] In some embodiments, the distance between the highest barrier dam and the first substrate is not less than the distance between the surface of the second encapsulation layer 220 away from the first substrate and the first substrate. By limiting the height of the barrier dam, the barrier dam can be ensured to function as an overflow.

[0094] In some embodiments, as Figure 2K As shown, the at least one barrier dam includes a first barrier dam 219 and a second barrier dam 225 ; wherein the first barrier dam 219 is at least partially embedded in the second barrier dam 225 , and the space between the first barrier dam 219 and the second barrier dam 225 forms a receiving groove 224 .

[0095] In some embodiments, as Figure 2H 、 Figure 2I As shown, the display island further includes a first encapsulation layer 218 ; the first encapsulation layer covers at least one barrier dam 225 .

[0096] In some embodiments, the display island 200 further includes a first encapsulation layer 218 and a third encapsulation layer 221 located on both sides of the second encapsulation layer 220; the material of the second encapsulation layer 220 is an organic material; the materials of the first encapsulation layer 218 and the third encapsulation layer 221 are each independently an inorganic material.

[0097] In some embodiments, the organic material includes one or more of polymethyl methacrylate, polycarbonate, polystyrene, and polyethylene terephthalate-1,4-cyclohexanedimethanol; the inorganic material includes SiN x , SiO2, SiON or more.

[0098] In some embodiments, as Figure 2A 、 Figure 2B 、 Figure 2J As shown, the display area D1 includes at least one pixel unit, and the at least one pixel unit is located on a side of the second encapsulation layer 220 close to the first substrate.

[0099] In some embodiments, the display panel further includes connecting bridges D3 connecting different display islands; a hollow area D4 is provided between the connecting bridges D3 and the display islands.

[0100] In some embodiments, the connecting bridge D3 includes a first substrate (corresponding to the flexible substrate 203 ), and a second planar layer 222 , a first electrode layer 212 , a third planar layer 223 , a first encapsulation layer 218 , and a third encapsulation layer 221 stacked on the first substrate.

[0101] Based on the same inventive concept, the embodiment of the present disclosure further provides a method for manufacturing a display panel, wherein the display panel includes a display island 200; the display island includes a display area D1 and a peripheral area D2 surrounding the display area; Figures 5A to 5E As shown, the manufacturing method includes:

[0102] like Figure 5B As shown, a first barrier dam 219 and a sacrificial layer 227 are formed in the peripheral area; the sacrificial layer 227 covers the sidewall and at least a portion of the end surface of the first barrier dam 219 away from the display area D1;

[0103] like Figure 5C As shown, a second barrier dam 225 is formed on the sacrificial layer 227; the second barrier dam covers the sidewall and at least a portion of the end surface of the sacrificial layer away from the display area;

[0104] Finally, the sacrificial layer is removed to form the receiving groove 224 .

[0105] In some embodiments, the material of the sacrificial layer 227 is selected from one or more of 8-hydroxyquinoline aluminum, Cu, Mo, and Al.

[0106] Based on the same inventive concept, an embodiment of the present disclosure further provides a display device, comprising any of the aforementioned display panels, and having the same technical effects, which will not be described in detail.

[0107] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Within the scope of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0108] The embodiments of the present disclosure are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A display panel, characterized in that: The display panel includes at least one display island; the display island includes a display area and a peripheral area surrounding the display area; The display island includes a first substrate and a second encapsulation layer located on the first substrate; The peripheral area includes at least one receiving groove; the second packaging layer fills the receiving groove.

2. The display panel according to claim 1, wherein: The volume of the holding tank is 1 to 20 pL; and / or The orthographic projection of the receiving groove on the first substrate extends along the outer periphery of the orthographic projection of the display area on the first substrate.

3. The display panel according to claim 1, wherein: The plurality of receiving grooves are arranged in a direction surrounding the display area; and / or, The plurality of receiving grooves are arranged in a direction away from the display area.

4. The display panel according to claim 1, wherein: The display island further includes a first encapsulation layer located on a side of the second encapsulation layer close to the first substrate; the first encapsulation layer extends into the receiving groove.

5. The display panel according to claim 1, wherein: The display panel further includes a connecting bridge connecting different display islands; the display islands further include a first electrode layer; wherein, The first electrode layer extends to the connecting bridge; the orthographic projection of the first electrode layer on the first substrate and the orthographic projection of the receiving groove on the first substrate do not overlap.

6. The display panel according to claim 1, wherein: The peripheral area further includes at least one blocking dam; the at least one blocking dam is located on a side of the receiving groove away from the display area.

7. The display panel according to claim 6, wherein: The distance between the at least one barrier dam with the largest height and the first substrate is not less than the distance between the surface of the second encapsulation layer away from the first substrate and the first substrate.

8. The display panel according to claim 6, wherein: The at least one barrier dam includes a first barrier dam and a second barrier dam; wherein the first barrier dam is at least partially embedded in the second barrier dam, and the space between the first barrier dam and the second barrier dam forms the accommodating groove.

9. The display panel according to claim 6, wherein: The display island further includes a first encapsulation layer; the first encapsulation layer covers the at least one barrier dam.

10. The display panel according to claim 1, wherein The display island further includes a first encapsulation layer and a third encapsulation layer respectively located on both sides of the second encapsulation layer; The material of the second encapsulation layer is an organic material; the materials of the first encapsulation layer and the third encapsulation layer are each independently an inorganic material.

11. The display panel according to claim 10, wherein: The organic material includes one or more of polymethyl methacrylate, polycarbonate, polystyrene plate and polyethylene terephthalate-1,4-cyclohexanedimethanol ester; the inorganic material includes SiN x , SiO2, SiON or more.

12. The display panel according to claim 1, wherein The display area includes at least one pixel unit, and the at least one pixel unit is located on a side of the second packaging layer close to the first substrate.

13. The display panel according to claim 1, wherein The display panel further includes connecting bridges connecting different display islands; a hollow area is provided between the connecting bridges and the display islands.

14. The display panel according to claim 13, wherein: The connecting bridge includes the first substrate, and a second planar layer, a first electrode layer, a third planar layer, a first encapsulation layer, and a third encapsulation layer stacked on the first substrate.

15. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 14.

Images