Stretchable display panel and stretchable display device

Abstract

The application discloses a stretchable display panel and a stretchable display device. The stretchable display panel comprises a flexible substrate layer, display units arranged in an array on the flexible substrate layer, and a wire assembly connected between two adjacent display units. The wire assembly comprises a guide rail and two sliding wires. The two sliding wires are both in sliding connection and electrical connection with the guide rail, and are respectively in electrical connection with the two adjacent display units. In the stretchable display panel, the display units are connected by the wire assembly. The wire assembly adopts a mechanical mode of relative sliding of the sliding wire and the guide rail to realize the stretching and contraction of the wire assembly. The defects of easy breakage and / or small stretching amount of the wire assembly during stretching can be avoided. The mechanical stability and the stretching amount of the wire assembly can be improved, so that the stretching performance of the stretchable display panel is improved.

Description

Technical Field

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

[0002] In related technologies, stretchable display devices use an “island-bridge” structure, such as Figure 1 As shown, the light-emitting unit serves as the display island and the serpentine wire serves as the connecting bridge. The serpentine wire is restricted by the material properties, is easy to break and has a small stretchability, generally only about 5%. In addition, the serpentine wire also greatly increases the manufacturing process difficulty and manufacturing cost of the display device.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0004] The present application aims to at least partially address the technical issues of wires in stretchable display devices being prone to breakage and having a limited amount of stretchability. To this end, the present application provides a stretchable display panel and a stretchable display device.

[0005] An embodiment of the present application provides a stretchable display panel, comprising:

[0006] flexible base layer;

[0007] Display units are arranged in an array on the flexible base layer; and

[0008] a wire assembly connected between two adjacent display units;

[0009] The wire assembly includes a guide rail and two sliding wires. The two sliding wires are both slidably connected to the guide rail and electrically connected. The two sliding wires are electrically connected to two adjacent display units respectively.

[0010] In some embodiments, the guide rail member is provided with a guide rail groove, the sliding wire includes a first wire segment and a second wire segment opposite to the first wire segment, the first wire segments of the two sliding wires are oppositely arranged in the guide rail groove, the first wire segments are slidable relative to the guide rail groove and are electrically connected to the guide rail groove; the second wire segments of the two sliding wires are respectively electrically connected to two adjacent display units.

[0011] In some embodiments, the guide rail groove is located inside the guide rail member, and the guide rail member includes two end surfaces located at both ends of the guide rail groove, and the two end surfaces are respectively provided with guide rail through holes corresponding to the guide rail groove;

[0012] The sliding wire includes a third wire segment connected between the first wire segment and the second wire segment, the orthographic projection of the third wire segment on the end surface is located in the guide rail through hole, the orthographic projection of the first wire segment on the end surface covers the guide rail through hole; the orthographic projection of the second wire segment on the end surface covers the guide rail through hole.

[0013] In some embodiments, the guide rail member further includes a side surface connected between the two end surfaces, the side surface is provided with a notch communicating with the guide rail groove, and an extension direction of the notch is the same as an extension direction of the guide rail groove.

[0014] In some embodiments, the notch includes a first notch segment and second notch segments located on both sides of the first notch segment;

[0015] The width of the orthographic projection of the first wire segment on the side surface is less than or equal to the width of the first notch segment, and the length of the orthographic projection of the first wire segment on the side surface is less than or equal to the length of the first notch segment;

[0016] The width of the orthographic projection of the third wire segment on the side surface is less than or equal to the width of the second slot segment, and the length of the orthographic projection of the third wire segment on the side surface is greater than or equal to the length of the second slot segment.

[0017] In some embodiments, the cross-section of the first wire segment is circular or diagonal, the cross-section of the guide rail groove is the same as the cross-section of the first wire segment, and the cross-sectional area of ​​the guide rail groove is equal to the cross-sectional area of ​​the first wire segment.

[0018] In some embodiments, a conductive fluid is provided in the guide rail groove.

[0019] In some embodiments, flexible material is filled between adjacent display units.

[0020] In some embodiments, the display unit includes at least one LED device, and each of the LED devices is connected to a corresponding set of the wire assemblies.

[0021] In some embodiments, the stretchable display panel further includes a top film protection layer, which covers a side of the display unit away from the flexible base layer.

[0022] An embodiment of the present application provides a stretchable display device, which includes the stretchable display panel described above.

[0023] The embodiments of the present application have at least the following beneficial effects:

[0024] In the above-mentioned stretchable display panel, the display units are connected by a wire assembly, and the wire assembly uses a mechanical method of relative sliding of the sliding wire and the guide rail to achieve the extension and contraction of the wire assembly, which can avoid the defects of easy breakage and / or small stretching amount of the wire assembly during the stretching process, and can improve the mechanical stability and stretching amount of the wire assembly, thereby improving the stretching performance of the stretchable display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A schematic diagram of the "island-bridge" structure of a stretchable panel in the related art is shown;

[0027] Figure 2 A top view of a stretchable display panel in the first embodiment of the present application is shown;

[0028] Figure 3 Shown Figure 2 A top view of the stretchable display panel when it is contracted;

[0029] Figure 4 Shown Figure 2 A top view of the stretchable display panel when stretched;

[0030] Figure 5 Shown Figure 3 A partial cross-sectional view of the display area of ​​the stretchable display panel when it is contracted;

[0031] Figure 6 Shown Figure 4 A partial cross-sectional view of the display area of ​​the stretchable display panel when stretched;

[0032] Figure 7 Shown Figure 5 Schematic diagram of the structure of the sliding wire in the middle wire assembly;

[0033] Figure 8 Shown Figure 5 Schematic diagram of the structure of the guide rail component in the middle conductor assembly;

[0034] Figure 9 shows a top view of a stretchable display panel in the second embodiment of the present application;

[0035] Figure 10 Shown Figure 9 A partial cross-sectional view of a stretchable display panel;

[0036] Figure 11 Shown Figure 9 A top view of the stretchable display panel when it is contracted;

[0037] Figure 12 Shown Figure 9 A top view of the stretchable display panel when stretched.

[0038] Reference numerals:

[0039] 1. Display island; 2. Connecting bridge; S1. Display area; S2. Non-display area; S21. Driver chip; 10. Flexible base layer; 11. Adhesion layer; 12. Reinforcement layer; 13. Buffer layer; 14. Gate insulation layer; 15. Interlayer dielectric layer; 16. First planarization layer; 17. Second planarization layer; 18. Protective layer; 19. Flexible material; 20. Display unit; 21. Bracket; 22. LED device; 23. Anode pin; 24. Cathode pin; 25. Source / drain electrode lead; 26. Source layer; 27. Source electrode; 28. Drain electrode; 29. ​​Gate electrode;

[0040] 30. Wire assembly; 31. Conductive solder; 40. Top film protective layer; 41. Optically transparent adhesive layer; 100. Guide rail component; 110. Guide rail groove; 111. Conductive fluid; 120. End face; 130. Guide rail through hole; 140. Side face; 150. Notch; 151. First notch section; 152. Second notch section; 200. Sliding wire; 210. First wire segment; 220. Second wire segment; 230. Third wire segment; A1. Length of the first notch section; W1. Width of the first notch section; A2. Length of the second notch section; W2. Width of the second notch section; W3. Diameter of the guide rail through hole; D1. Diameter of the first wire segment; L1. Length of the first wire segment; D2. Diameter of the second wire segment; L2. Length of the second wire segment; D3. Diameter of the third wire segment; L3. Length of the third wire segment. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] In addition, this application may repeat reference numbers and / or reference letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0043] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0044] MLED display technology is a general term for Mini LED and Micro LED. It is recognized as the next-generation display technology after LCD and OLED display technology. It has the advantages of high luminous efficiency, long life, and low power consumption. The existing MLED product substrates are mostly made of silicon, glass, polyimide and other materials with almost no ductility, so it is difficult to have stretchability. Therefore, MLED still has great development potential in the application of flexible or stretchable display devices.

[0045] In related technologies, stretchable display devices use an “island-bridge” structure, such as Figure 1 As shown, the light-emitting unit serves as the display island 1, and the serpentine wire serves as the connecting bridge 2. The serpentine wire bears the stretching of the display unit 20. The serpentine wire is restricted by the material properties, has poor mechanical stability, and is complex to manufacture. It has the defects of being easy to break and having a small stretching amount, which is generally only about 5%. In addition, the serpentine wire also greatly increases the difficulty and cost of the manufacturing process of the display device.

[0046] In view of the above problems existing in the stretchable display panel, the embodiment of the present application provides a stretchable display panel, such as Figures 2 to 8 As shown, the stretchable display panel includes a flexible substrate layer 10, display units 20 and a wire assembly 30, wherein the display units 20 are arranged in an array on the flexible substrate layer 10, and the wire assembly 30 is connected between two adjacent display units 20; wherein, the wire assembly 30 includes a guide rail member 100 and two sliding wires 200, the two sliding wires 200 are both slidably connected and electrically connected to the guide rail member 100, and the two sliding wires 200 are electrically connected to two adjacent display units 20 respectively.

[0047] In the stretchable display panel of this embodiment, the display units 20 are connected by a wire assembly 30. The wire assembly 30 uses a mechanical method in which the sliding wire 200 and the guide rail member 100 slide relative to each other to achieve the extension and contraction of the wire assembly 30. This can avoid the defects of easy breakage and / or small stretching amount of the wire assembly 30 during the stretching process, and can improve the mechanical stability and stretching amount of the wire assembly 30, thereby improving the stretching performance of the stretchable display panel.

[0048] The stretchable display panel provided in this application can be as follows Figures 2 to 8 The passive (PM) stretchable display panel provided in the embodiment 1 shown may also be as follows Figures 9 to 12 The second embodiment shown provides an active (AM) stretchable display panel.

[0049] The passive stretchable display panel provided in the first embodiment of the present application is as follows: Figures 2 to 8 As shown, the passive stretchable display panel includes a non-display area S2 and a display area S1. The non-display area S2 includes a driver chip S21 and a driver circuit. The display area S1 includes a flexible substrate layer 10, a plurality of display units 20 arranged in an array on the flexible substrate layer 10, and a wire assembly 30 connected between adjacent display units 20. The display unit 20 includes a bracket 21 and an LED device 22 arranged on the bracket 21. The LED device 22 can be a Mini LED or a Micro LED. The LED device 22 is packaged in the bracket 21 using surface mount technology (SMT). One, two, three or four LED devices 22 can be packaged in the bracket 21. This embodiment takes the packaging of an RGB LED as an example to exemplify the stretchable display panel of this embodiment.

[0050] In the first embodiment, the flexible substrate 10 is made of a flexible insulating material, such as polydimethylsiloxane (PDMS) or polyurethane (PU), resulting in a thin-film flexible substrate 10 with excellent stretchability, elongation, and resilience. The support 21 is made of a rigid material and is where the thin-film transistor (TFT) circuitry, LED devices 22 serving as light-emitting sub-pixels, and the internal wiring within the pixel are placed. The pins on the LED device 22 can first be welded to the inner-pixel wires on the bracket 21, and then led out through the sliding wire 200. The wire assembly 30 is extended and retracted by sliding the sliding wire 200 relative to the guide rail member 100, so that the display unit 20 of the stretchable display panel maintains electrical connection during the contraction and stretching process. Since the wire assembly 30 serving as the connecting bridge 2 during the contraction and stretching process is purely mechanically extended and retracted, on the one hand, the mechanical stability and tensile performance of the stretchable display panel can be improved, and the risk of the connecting bridge 2 of the stretchable display panel being easily broken and failing during the stretching or contraction process can be avoided. On the other hand, the difficulty of preparing the connecting bridge 2 can be reduced, thereby reducing the manufacturing cost.

[0051] The active stretchable display panel provided in the second embodiment of the present application is as follows Figures 9 to 12As shown, the actively driven stretchable display panel includes a non-display area S2 and a display area S1. The non-display area S2 includes a driver chip S21 and a driver circuit. The display area S1 includes a flexible substrate layer 10, a plurality of display units 20 arranged in an array on the flexible substrate layer 10, and a wire assembly 30 connected between adjacent display units 20. The display unit 20 includes a bracket 21 and an LED device 22 arranged on the bracket 21. The LED device 22 can be a Mini LED or a Micro LED. One, two, three, or four LED devices 22 can be arranged in the bracket 21. This embodiment takes the packaging of three RGB LEDs as an example to illustrate the stretchable display panel of this embodiment. In this case, the Mini LED stretchable display panel is a full-color display device.

[0052] In the second embodiment, the flexible substrate layer 10 is made of a flexible insulating material. For example, the thin film flexible substrate layer 10 can be made of PDMS, PU, ​​etc., so that the flexible substrate layer 10 has good stretchability, elongation, and resilience. The bracket 21 is made of a rigid material. The TFT circuit, the LED device 22 as the light-emitting sub-pixel, and the pixel internal wires can be arranged on the bracket 21. The pins on the LED device 22 can first be welded to the pixel internal wires on the bracket 21, and then led out through the sliding wire 200. The sliding wire 200 slides relative to the guide rail member 100 to achieve the expansion and contraction of the wire assembly 30, so that the display unit 20 of the stretchable display panel remains electrically connected during the contraction and expansion process.

[0053] In the embodiment of the present application, the guide rail member 100 is conductive, and thus can be made of a conductive metal or conductive alloy. The material of the guide rail member 100 is selected from any one or more of gold, silver, copper, aluminum, titanium, and aluminum. The sliding wire 200 is conductive, and thus can be made of a conductive metal or conductive alloy. The material of the sliding wire 200 is selected from any one or more of gold, silver, copper, aluminum, titanium, and aluminum.

[0054] As an optional embodiment, the guide rail member 100 is provided with a guide rail groove 110, and the sliding wire 200 includes a first wire segment 210 and a second wire segment 220 opposite to the first wire segment 210. The first wire segments 210 of the two sliding wires 200 are arranged oppositely in the guide rail groove 110, and the first wire segments 210 are slidable relative to the guide rail groove 110 and are electrically connected to the guide rail groove 110; the second wire segments 220 of the two sliding wires 200 are respectively electrically connected to two adjacent display units 20.

[0055] In the embodiments of the present application, Figures 2 to 8As shown, a guide groove 110 is defined in the guide rail member 100. The guide groove 110 accommodates the first wire segment 210 of the sliding wire 200 and enables the first wire segment 210 to slide relative to the guide groove 110. The guide groove 110 can define the sliding direction of the first wire segment 210 and ensure electrical connection between the guide groove 110 and the first wire segment 210, thereby ensuring that the guide rail member 100 and the sliding wire 200 are always in electrical contact and form an electrical connection during the stretching process of the stretchable display panel.

[0056] In the stretchable display panel, two adjacent display units 20 are electrically connected through a wire assembly 30. When the stretchable display panel is subjected to external tension, the first wire segments 210 of the two sliding wires 200 slide back to back in the guide rail groove 110, thereby expanding the distance between the two adjacent display units 20 and achieving the stretching of the stretchable display panel; when the external force applied to the stretchable display panel disappears, the first wire segments 210 of the two sliding wires 200 slide toward each other in the guide rail groove 110, thereby reducing the distance between the two adjacent display units 20 and achieving the recovery of the stretchable display panel.

[0057] As an optional embodiment, the cross-section of the first wire segment 210 is circular or diagonal, the cross-section of the guide rail groove 110 is the same as the cross-sectional shape of the first wire segment 210, and the cross-sectional area of ​​the guide rail groove 110 is greater than or equal to the cross-sectional area of ​​the first wire segment 210.

[0058] In an embodiment of the present application, the cross-section of the first wire segment 210 is circular or diagonal. Accordingly, in order to enable the first wire segment 210 to slide in the guide rail groove 110 and maintain electrical connection with the guide rail groove 110, the cross-section of the guide rail groove 110 is made the same as the cross-sectional shape of the first wire segment 210, and the cross-sectional area of ​​the guide rail groove 110 is equal to the cross-sectional area of ​​the first wire segment 210, so that the first wire segment 210 maintains good electrical contact with the inner groove wall of the guide rail groove 110.

[0059] As an optional implementation, a conductive fluid 111 is provided in the guide rail groove 110 .

[0060] In the embodiments of the present application, Figure 5 and Figure 6 As shown, in order to ensure good electrical contact between the first wire segment 210 and the inner groove wall of the slide rail groove and reduce the contact resistance, a conductive fluid 111 can be poured into the guide rail groove 110. The conductive fluid 111 can be liquid metal or a liquid containing conductive particles, thereby increasing the contact area between the first wire segment 210 and the slide rail groove and reducing the resistance between the first wire segment 210 and the slide rail groove.

[0061] As an optional embodiment, the guide rail groove 110 is located inside the guide rail member 100, and the guide rail member 100 includes two end surfaces 120 located at both ends of the guide rail groove 110. The two end surfaces 120 are respectively provided with guide rail through holes 130 corresponding to the guide rail groove 110;

[0062] The sliding wire 200 includes a third wire segment 230 connected between the first wire segment 210 and the second wire segment 220. The orthographic projection of the third wire segment 230 on the end surface 120 is located in the guide rail through hole 130. The orthographic projection of the first wire segment 210 on the end surface 120 covers the guide rail through hole 130; the orthographic projection of the second wire segment 220 on the end surface 120 covers the guide rail through hole 130.

[0063] In the embodiments of the present application, Figure 7 and Figure 8 As shown, a guide rail through hole 130 corresponding to the guide rail groove 110 is provided on the end face 120 of the guide rail member 100, so that the sliding wire 200 can slide in the extension direction of the guide rail groove 110. At the same time, the orthographic projection of the third wire segment 230 on the end face 120 is located in the guide rail through hole 130, and the orthographic projection of the first wire segment 210 on the end face 120 covers the guide rail through hole 130; the orthographic projection of the second wire segment 220 on the end face 120 covers the guide rail through hole 130, which can ensure that during the sliding of the sliding wire 200 relative to the guide rail member 100, the first wire segment 210 will not fall out of the guide rail groove 110, the second wire segment 220 will not enter the guide rail groove 110, and the third wire segment 230 can pass through the guide rail through hole 130 without hindrance to enable the first wire segment 210 to slide smoothly in the guide rail groove 110.

[0064] It should be noted that in order for the sliding wire 200 to slide smoothly in the guide rail groove 110 , the center lines of the first wire segment 210 , the second wire segment 220 and the third wire segment 230 of the sliding wire 200 are kept on the same horizontal line as the center line of the guide rail groove 110 .

[0065] In the embodiments of the present application, Figure 7 and Figure 8As shown, the cross-section of the first wire segment 210, the cross-section of the second wire segment 220, the cross-section of the third wire segment 230, and the cross-section of the guide rail groove 110 are all circular as an example to illustrate the wire assembly 30 of the present application. In order to ensure that during the sliding of the sliding wire 200 relative to the guide rail member 100, the first wire segment 210 will not fall out of the guide rail groove 110, the second wire segment 220 will not enter the guide rail groove 110, and the third wire segment 230 can pass through the guide rail through-hole 130 without hindrance so that the first wire segment 210 can slide smoothly in the guide rail groove 110, the diameter D1 of the first wire segment can be larger than the diameter W3 of the guide rail through-hole, the diameter D2 of the second wire segment can be larger than the diameter W3 of the guide rail through-hole, and the diameter D3 of the third wire segment can be less than or equal to the diameter W3 of the guide rail through-hole.

[0066] As an optional embodiment, the guide rail member 100 further includes a side surface 140 connected between the two end surfaces 120 . The side surface 140 is provided with a notch 150 communicating with the guide rail groove 110 . The extending direction of the notch 150 is the same as the extending direction of the guide rail groove 110 .

[0067] In the embodiments of the present application, Figure 7 and Figure 8 As shown, in order to allow the sliding wire 200 to be placed in the guide rail groove 110, a notch 150 is formed in the side surface 140 of the guide rail member 100. The notch 150 is connected to the guide rail groove 110 and the extending direction of the notch 150 is the same as the extending direction of the guide rail groove 110. Therefore, the sliding wire 200 can be placed in the guide rail groove 110 through the notch 150.

[0068] like Figure 8 As shown, the orthographic projections of the notch 150 and the guide rail groove 110 on the end face 120 of the guide rail member 100 are U-shaped. Therefore, when assembling the sliding wire 200 with the guide rail member 100, the second wire segment 220 of the sliding wire 200 can be welded to the circuit of the display unit 20 bracket 21 first, so that the extension direction of the sliding wire 200 is the same as the extension direction of the guide rail groove 110, and the first wire segment 210 of the sliding wire 200 is placed in the guide rail groove 110 parallel to the notch 150 on the side 140 of the guide rail member 100.

[0069] As an optional embodiment, the notch 150 includes a first notch section 151 and second notch sections 152 located on both sides of the first notch section 151;

[0070] The width of the orthographic projection of the first wire segment 210 on the side surface 140 is less than or equal to the width W1 of the first slot segment, and the length of the orthographic projection of the first wire segment 210 on the side surface 140 is less than or equal to the length A1 of the first slot segment;

[0071] The width of the orthographic projection of the third wire segment 230 on the side surface 140 is less than or equal to the width W2 of the second slot segment, and the length of the orthographic projection of the third wire segment 230 on the side surface 140 is greater than or equal to the length A2 of the second slot segment.

[0072] In this embodiment, if Figure 7 and Figure 8 As shown, by making the width of the orthographic projection of the first wire segment 210 on the side surface 140 less than or equal to the width W1 of the first slot segment, and the length of the orthographic projection of the first wire segment 210 on the side surface 140 less than or equal to the length A1 of the first slot segment, even if the diameter D1 of the first wire segment is less than or equal to the width W1 of the first slot segment, and the length L1 of the first wire segment is less than or equal to the length A1 of the first slot segment, during the process of combining the sliding wire 200 with the guide rail member 100, the first wire segment 210 can enter the guide rail groove 110 through the first slot segment 151;

[0073] The width of the orthographic projection of the third wire segment 230 on the side surface 140 is less than or equal to the width W2 of the second slot segment, and the length of the orthographic projection of the third wire segment 230 on the side surface 140 is greater than or equal to the length A2 of the second slot segment. Even if the diameter D3 of the third wire segment is less than or equal to the width W2 of the second slot segment and the length L3 of the third wire segment is greater than or equal to the length A2 of the second slot segment, during the assembly of the sliding wire 200 with the guide rail member 100, the first wire segment 210 can align with the first slot segment 151 and enter the guide rail groove 110 through the first slot segment 151, while the third wire segment 230 can enter the guide rail groove 110 through the second slot segment 152, and the second wire segment 220 will not interfere with the assembly of the first wire segment 210 and the second wire segment 220. After assembly, the first wire segment 210 can slide toward the adjacent guide rail through-hole 130, thereby preventing the first wire segment 210 from falling out of the guide rail groove 110.

[0074] As a further optional embodiment, the length A1 of the first notch segment is less than twice the length of the orthographic projection of the first wire segment 210 on the side surface 140 .

[0075] In this embodiment, by making the length A1 of the first slot segment less than twice the length of the positive projection of the first wire segment 210 on the side surface 140, that is, the length A1 of the first slot segment is less than twice the length of the first wire segment 210, then during the assembly process of the sliding wire 200 and the guide rail member 100, the first wire segment 210 of the first sliding wire 200 can be first installed into the guide rail groove 110 through the first slot segment 151, and then the first sliding wire 200 can be slid toward the adjacent guide rail through hole 130 so that the first wire segment 210 of the sliding wire 200 avoids the first slot segment 151, so that the first wire segment 210 of the second sliding wire 200 can be installed into the guide rail groove 110 through the first slot segment 151, and then the second sliding wire 200 can be slid toward the adjacent guide rail through hole 130. After assembly is completed, the total length of the first wire segment 210 of the first sliding wire 200 and the first wire segment 210 of the second sliding wire 200 is greater than the length A1 of the first slot segment. During the sliding process of the first wire segment 210 of the first sliding wire 200 and the first wire segment 210 of the second sliding wire 200 relative to the guide rail member 100, the mutual influence can prevent the first wire segment 210 from falling out of the guide rail slot 110.

[0076] As an optional implementation, flexible material 19 is filled between adjacent display units 20 .

[0077] In the embodiments of the present application, Figure 5 and 6 as well as Figure 10 As shown, flexible material 19 is filled between adjacent display units 20, that is, the gaps between the brackets 21 of each display unit 20 are filled with the flexible material 19. The flexible material 19 is filled to stabilize the setting position of the wire assembly 30, thereby enhancing the mechanical stability of the wire assembly 30 and effectively preventing the sliding wire 200 from falling out of the guide rail groove 110.

[0078] In the embodiment of the present application, the flexible material 19 and the flexible base layer 10 may be made of the same or different materials. For example, the flexible material 19 may be made of PDMS, PU, ​​or the like.

[0079] As an optional implementation, the display unit 20 includes at least one LED device 22 , and each LED device 22 is correspondingly connected to a set of wire assemblies 30 .

[0080] In Example 1 of the present application, Figures 2 to 4 As shown, the display unit 20 may include an LED device 22 , that is, a red LED device 22 , a green LED device 22 , a blue LED device 22 or a white LED device 22 is set on the bracket 21 , and each LED device 22 is correspondingly connected to a set of wire components 30 .

[0081] In the second embodiment of the present application, as shown in Figures 9 to 12 , the display unit 20 can include three LED devices 22, i.e. one red LED device 22, one green LED device 22 and one blue LED device 22 are arranged on one bracket 21 to form one display unit 20, and the three LED devices 22 of the display unit 20 are connected with three groups of wire assemblies 30 one by one.

[0082] As an optional embodiment, the stretchable display panel further includes a top film protective layer 40, which covers the side of the display unit 20 away from the flexible substrate layer 10.

[0083] In the embodiments of the application, as shown in Figure 5 , Figure 6 and Figure 10 , the top film protective layer 40 covers the side of the display unit 20 away from the flexible substrate layer 10, and the top film protective layer 40 can protect the display unit 20 and the wire assembly 30 and other structures.

[0084] In the embodiments of the present application, the top film protective layer 40 can be made of flexible material 19, and the preparation material of the top film protective layer 40 is the same as or different from the preparation material of the flexible substrate layer 10, for example, PDMS, PU and other flexible materials 19 can be used to prepare the top film protective layer 40, and other high-transparency flexible stretchable materials can also be used.

[0085] In the stretchable display panel of the present application, the stretchability of the wire assembly 30 can be adjusted by adjusting the length L3 ratio of the first wire segment 210, the second wire segment 220 and the third wire segment of the sliding wire 200. The stretchability of the wire assembly 30 of the present application can be adjusted between 1% and 100%.

[0086] In the first and second embodiments of the present application, as shown in Figure 3 , Figure 5 and Figure 11 , when the stretchable display panel is in the basic state (shrunk), the first wire segment 210 and the third wire segment 230 of the sliding wire 200 are in the guide rail groove 110 of the guide rail piece 100, and the second wire segment 220 is completely outside the guide rail groove 110 of the guide rail piece 100 because the diameter D2 of the second wire segment of the sliding wire 200 is larger than the diameter of the guide rail through hole 130.

[0087] If an external force in the up-down direction or the left-right direction is applied to the stretchable display panel as shown in Figure 3 and Figure 5 , the stretchable display panel gradually stretches into a stretched state, as shown in Figure 4 , Figure 6 and Figure 11As shown, the first wire segment 210 and the third wire segment 230 of the sliding wire 200 slide in the guide rail groove 110 of the guide rail component 100 toward the adjacent guide rail through hole 130. Since the diameter D1 of the first wire segment of the sliding wire 200 is larger than the diameter of the guide rail through hole 130, when the stretching amount is maximum, the first wire segment 210 of the sliding wire 200 cannot fall out of the guide rail through hole 130 corresponding to the guide rail groove 110, and the sliding wire 200 still maintains electrical connection with the guide rail component 100.

[0088] In the preparation process of the stretchable display panel of Example 1, as shown in FIG. Figure 5 and Figure 6 As shown, an adhesive layer 11 can be first prepared on a flexible substrate layer 10, and then the assembled LED device 22, bracket 21, guide rail 100, and sliding wire 200 can be transferred to the flexible substrate layer 10 as a whole. Then, a flexible material 19 can be filled between the display units 20, particularly between the display units 20 and brackets 21, using methods such as dripping, spin coating, printing, or printing. The flexible material 19 fills the gaps between the display units 20 and brackets 21 to stabilize the position of the wire assembly 30, thereby enhancing the mechanical stability of the wire assembly 30 and effectively preventing the sliding wire 200 from falling out of the guide rail groove 110.

[0089] In the preparation process of the stretchable display panel in Example 2, as shown in FIG. Figure 10 As shown, an adhesion layer 11 can be formed on a flexible substrate 10 (stretchable substrate), and a polyimide (PI) reinforcement layer 12 can be formed on the adhesion layer 11. The reinforcement layer 12 maintains good adhesion to the flexible substrate 10 through the adhesion layer 11. A buffer layer 13 can then be formed on the reinforcement layer 12. An active layer 26 (active), a source electrode 27, and a drain electrode 28 can then be formed on the buffer layer 13. A gate insulating layer 14 (GI) is then deposited on the active layer 26, source electrode 27, and drain electrode 28. A gate 29 (gate) is then formed on the gate insulating layer 14. An interlayer dielectric layer 15 (ILD) is then formed on the gate insulating layer 14 and gate 29. Finally, a first planarization layer 16 (PLN) is formed on the interlayer dielectric layer 15. After the first planarization layer 16 is formed, the first planarization layer 16, the interlayer dielectric layer 15, and the gate insulating layer 14 surrounding the area where the display unit 20 is located need to be etched away. Then, source and drain electrode leads 25 (SD) are deposited on the surface of the first flat layer 16, the interlayer dielectric layer 15 and the gate insulating layer 14 in the display unit 20 setting area, and conductive solder 31 is prepared at the end of the source and drain electrode leads 25 in the buffer layer 13. The assembled guide rail 100 and the sliding wire 200 are transferred to the Figure 10The structure is transferred to the buffer layer 13, corresponding to the areas where the first planar layer 16, interlayer dielectric layer 15, and gate insulating layer 14 are etched away, surrounding the display unit 20 location. The second conductor segment 220 of the sliding conductor 200 is positioned at the end of the buffer layer 13, allowing contact between the source / drain electrode lead 25 and the conductive solder 31. After heating and soldering, the conductive solder 31 welds the second conductor segment 220 to the ends of the source / drain electrode lead 25, thereby forming a continuous circuit between the source / drain electrode lead 25, the conductive solder 31, the sliding conductor 200, and the guide rail 100. A second planar layer 17 (PLN) is then deposited to fill the etched areas of the first planar layer 16, interlayer dielectric layer 15, and gate insulating layer 14 surrounding the display unit 20 location. The Mini LED device 22 is transferred to the display unit 20 location using mass transfer technology, and the anode and cathode pins 23 and 24 of the Mini LED device 22 are soldered to the source / drain electrode lead 25 in the structure. A protective layer 18 (PL) can then be deposited over the first planarizing layer 16, the second planarizing layer 17, the source / drain electrode leads 25, the anode pins 23, and the cathode pins 24 to maintain the mechanical strength of the welds between the anode pins 23 and cathode pins 24 and the source / drain electrode leads 25. An optically transparent adhesive layer 41 is then formed over the protective layer 18 and the Mini LED device. A stretchable top film protective layer 40 is then attached through the optically transparent adhesive layer 41 to protect the Mini LED device and other structures.

[0090] In an embodiment of the present application, the sliding wire 200 and the guide rail member 100 can be prepared by casting, etching, etc. The sizes of the sliding wire 200 and the guide rail member 100 prepared by casting, etching, etc. can be more matched, thereby enhancing the stability of the sliding wire 200 and the guide rail member 100 sliding relative to each other.

[0091] Based on the same inventive concept, an embodiment of the present application provides a stretchable display device, which includes the above-mentioned stretchable display panel.

[0092] Since the stretchable display device provided by the present invention includes the stretchable display panel of the above technical solution, all the beneficial effects of the stretchable display device provided by the present invention and the above stretchable display panel are not described in detail here.

[0093] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0094] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0095] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0096] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0097] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0099] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0100] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A stretchable display panel, characterized in that: The stretchable display panel comprises: flexible base layer; Display units are arranged in an array on the flexible base layer; and a wire assembly connected between two adjacent display units; The wire assembly includes a guide rail and two sliding wires, the two sliding wires are both slidably connected to the guide rail and electrically connected, and the two sliding wires are respectively electrically connected to two adjacent display units; The guide rail member is provided with a guide rail groove, and the sliding wire includes a first wire segment and a second wire segment opposite to the first wire segment. The first wire segments of the two sliding wires are arranged oppositely in the guide rail groove, and the first wire segments are slidable relative to the guide rail groove and electrically connected to the guide rail groove; the second wire segments of the two sliding wires are respectively electrically connected to two adjacent display units.

2. The stretchable display panel according to claim 1, wherein: The guide rail groove is located inside the guide rail member, and the guide rail member includes two end surfaces located at both ends of the guide rail groove, and the two end surfaces are respectively provided with guide rail through holes corresponding to the guide rail groove; The sliding wire includes a third wire segment connected between the first wire segment and the second wire segment, the orthographic projection of the third wire segment on the end surface is located in the guide rail through hole, the orthographic projection of the first wire segment on the end surface covers the guide rail through hole; the orthographic projection of the second wire segment on the end surface covers the guide rail through hole.

3. The stretchable display panel according to claim 2, wherein: The guide rail member further includes a side surface connected between the two end surfaces, the side surface is provided with a notch communicating with the guide rail groove, and the extending direction of the notch is the same as the extending direction of the guide rail groove.

4. The stretchable display panel according to claim 3, wherein: The notch includes a first notch section and second notch sections located on both sides of the first notch section; The width of the orthographic projection of the first wire segment on the side surface is less than or equal to the width of the first notch segment, and the length of the orthographic projection of the first wire segment on the side surface is less than or equal to the length of the first notch segment; The width of the orthographic projection of the third wire segment on the side surface is less than or equal to the width of the second slot segment, and the length of the orthographic projection of the third wire segment on the side surface is greater than or equal to the length of the second slot segment.

5. The stretchable display panel according to any one of claims 1 to 4, wherein: The cross section of the first wire segment is circular or diagonal, the cross section of the guide rail groove is the same as the cross section of the first wire segment, and the cross section area of ​​the guide rail groove is equal to the cross section area of ​​the first wire segment.

6. The stretchable display panel according to claim 5, wherein: Conductive fluid is provided in the guide rail groove.

7. The stretchable display panel according to claim 5, wherein: Flexible material is filled between adjacent display units.

8. The stretchable display panel according to claim 5, wherein: The display unit includes at least one LED device, and each of the LED devices is correspondingly connected to a group of the wire assemblies.

9. The stretchable display panel according to claim 5, wherein: The stretchable display panel further includes a top film protection layer, which covers a side of the display unit away from the flexible base layer.

10. A stretchable display device, characterized in that: The stretchable display device comprises the stretchable display panel according to any one of claims 1 to 9.

Images