Display panel and display device

Abstract

The application relates to a display panel and a display device, the display panel comprising a plurality of pixel islands and a plurality of connecting bridges, each pixel island comprising a pixel circuit and a light-emitting unit; the plurality of connecting bridges are connected between adjacent pixel islands, each connecting bridge comprising a wire connected to the pixel circuit on the adjacent pixel island, the connecting bridge comprising a fixed segment and a bistable bending segment connected to each other, one end of the fixed segment being connected to the pixel island and the other end extending out of the pixel island and being connected to the bistable bending segment. The application can improve the stability and safety of the screen body before and after stretching, and improve the display effect of the screen body before and after stretching.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel and a display device. Background Technology

[0002] With the development of display technology and the increasing demand for visual displays, stretchable displays have emerged. Existing stretchable display panels typically contain multiple pixel islands and wires connecting these islands, utilizing the elasticity of the wires to stretch the screen.

[0003] However, based on the current screen design, the wires are subjected to uneven stress during the stretching process, which may lead to the risk of wire breakage, resulting in poor screen display effect and the inability to fully recover during the recovery process. Summary of the Invention

[0004] This invention provides a display panel and a display device that can improve the stability and safety of the screen before and after stretching, and improve the display effect of the screen before and after stretching.

[0005] On one hand, according to an embodiment of the present invention, a display panel is provided, including multiple pixel islands and multiple connecting bridges. Each pixel island includes a pixel circuit and a light-emitting unit. Multiple connecting bridges are connected between adjacent pixel islands. Each connecting bridge includes a wire connected to the pixel circuit on the adjacent pixel island. The connecting bridge includes a fixed section and a bistable curved section that are connected to each other. One end of the fixed section is connected to the pixel island and the other end extends out of the pixel island and is connected to the bistable curved section.

[0006] According to one aspect of the present invention, the bistable bending segment is bent and, in a first state, the bistable bending segment is convex outward away from the fixing part; in a second state, the bistable bending segment is convex inward toward the fixing part.

[0007] Preferably, the connecting bridge includes two sets of fixed sections and bistable bending sections, and the two bistable bending sections are connected between two corresponding fixed sections;

[0008] Preferably, the connecting bridge further includes a connecting segment connecting the two bistable bending segments. In a first state, the two sets of bistable bending segments are convex outward from their respective fixed segments, and in a second state, the two sets of bistable bending segments are convex inward toward their respective fixed segments.

[0009] Preferably, the fixed section, the bistable bending section, and the connecting section are integrally formed;

[0010] Preferably, the two sets of fixed sections and bistable bending sections are axisymmetric structures.

[0011] According to one aspect of the present invention, one end of the fixed segment is connected to the pixel island and the other end is connected to one end of the bistable curved segment, and the other end of the bistable curved segment is connected to the connecting segment.

[0012] Preferably, in the first state, the end of the connecting segment that connects to the bistable curved segment is spaced apart from the pixel island;

[0013] Preferably, the distance between the end and the pixel island is 15μm-16μm.

[0014] According to one aspect of the present invention, two wires are connected between two adjacent pixel islands, and the distance between two fixed segments connected on the same side of the pixel island gradually increases in the direction away from the pixel island;

[0015] Preferably, the bistable bending segments of the two conductors extend toward the opposite side of each other in a direction away from the fixed segments to which they are connected;

[0016] Preferably, the connecting segments of the two conductors are spaced apart from each other;

[0017] Preferably, the fixed segment and the bistable bending segment of each of the two conductors enclose an adjustment cavity. In the first state, the bistable bending segment protrudes away from the adjustment cavity, and in the second state, the bistable bending segment protrudes toward the adjustment cavity.

[0018] According to one aspect of the present invention, the display panel includes an insulating layer disposed between a connecting segment of two wires;

[0019] Preferably, the two conductors are arranged opposite to the insulation layer and are symmetrically distributed with respect to it as an axis;

[0020] Preferably, the insulating layer comprises a polyimide material;

[0021] Preferably, the thickness of the insulating layer includes 5μm-10μm.

[0022] According to one aspect of the present invention, a plurality of pixel islands are arranged in an array on a flexible substrate along a first direction and a second direction, the first direction and the second direction intersect, and the wires include a first wire and a second wire, the first wire connecting two adjacent pixel islands along the first direction, and the second wire connecting two adjacent pixel islands along the second direction.

[0023] According to one aspect of the present invention, the orthographic projection of the pixel island on the flexible substrate is rectangular and includes four vertices, and the fixed segments of the first wire and the second wire are respectively connected to the same vertices of the pixel island and are spaced apart from each other.

[0024] Preferably, the spacing between the fixed segments of the first and second conductors is 12μm-13μm.

[0025] According to one aspect of the present invention, a bistable bending segment includes a first part and a second part. The bistable bending segment is connected to a fixed segment through the first part. In a first state, the first part protrudes outward from the fixed segment and the second part protrudes inward toward the fixed segment. In a second state, the first part protrudes inward toward the fixed segment and the second part protrudes outward from the fixed segment. The length of the first part is greater than the length of the second part.

[0026] According to one aspect of the present invention, the bistable bending section is made of Ti / Al / Ti composite metal.

[0027] In another aspect, according to an embodiment of the present invention, a display device is provided, including the display panel as described above.

[0028] This invention provides a display panel and a display device. By configuring the wires connecting adjacent pixel islands into a structure of fixed segments and bistable curved segments, and by connecting the fixed segments to the pixel islands while allowing the bistable curved segments to move relative to the fixed segments, the overall stretching of the display panel is achieved. By adjusting the angle between the fixed segments and the bistable curved segments, the display panel can switch between a first state and a second state. Due to the notch structure of the bistable curved segments, the pixel islands can freely switch states before and after stretching. Utilizing the inherent stability of the bistable curved segments, the display panel has a stable structure in both the first and second states, improving the stability of the display panel before and after stretching. Furthermore, due to the bending capability of the bistable curved segments, this structure can also prevent breakage or damage caused by excessive stretching of the wires, improving the safety and stability of the connection between adjacent pixel islands and providing reliable assurance for stable display before and after stretching, thereby improving the overall display effect before and after stretching. Attached Figure Description

[0029] The features, advantages and technical effects of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the structure of a display panel in a first state according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a display panel in a second state according to an embodiment of the present invention;

[0032] Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle;

[0033] Figure 4 This is a schematic diagram of the structure at the location of the insulating layer in an embodiment of the present invention;

[0034] Figure 5 yes Figure 3AA section diagram.

[0035] Figure label:

[0036] 10 - Pixel island; 20 - Conductor; 21 - Fixed section; 22 - Bistable bending section; 23 - Notch; 24 - Connecting section;

[0037] 30 - Adjustment cavity; 40 - Insulating layer; X - First direction; Y - Second direction;

[0038] 1-First conductor; 2-Second conductor; 22a-First part; 22b-Second part.

[0039] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0040] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the accompanying drawings and the following description, at least some well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the invention; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0041] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the display panel and display device of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0042] To better understand this invention, the following is combined with... Figures 1 to 5 The display panel and display device according to embodiments of the present invention will be described in detail.

[0043] Please see Figure 1 and Figure 2According to an embodiment of the present invention, a display panel is provided, including a flexible substrate, a plurality of pixel islands 10, and a conductor 20. The plurality of pixel islands 10 are disposed on the flexible substrate. The conductor 20 connects two adjacent pixel islands 10 and includes a fixed section 21 and a bistable bending section 22 connected to each other. The fixed section 21 and the bistable bending section 22 are movably connected to form an adjustable predetermined angle between the bistable bending section 22 and the fixed section 21. The bistable bending section 22 extends along a bending path to form a notch 23. The predetermined angle includes a first angle and a second angle. The display panel has a first state and a second state. In the first state, adjacent pixel islands 10 are brought closer to each other, the fixed section 21 and the bistable bending section 22 form a first angle, and the notch 23 faces the fixed section 21. In the second state, adjacent pixel islands 10 are extended away from each other, the fixed section 21 and the bistable bending section 22 form a second angle, and the notch 23 faces away from the fixed section 21. The second angle is greater than the first angle.

[0044] In this embodiment, the display panel can be a stretchable display screen. Specifically, multiple pixel islands 10 are set on a flexible substrate. The flexible substrate has stretchable or bendable characteristics and can be made of flexible materials. Optionally, the pixel islands 10 can be light-emitting units. The light-emitting units can emit light of different colors such as red, green and blue, and complete the color display after the emitted light is mixed.

[0045] Adjacent pixel islands 10 need to be connected by wires 20 so that different driving signals can be conducted and the signals can be effectively transmitted. Optionally, the wires 20 can be made of metal. This application does not make any special restrictions on the specific type of wires 20, as long as they can ensure the communication between adjacent pixel islands 10.

[0046] In this embodiment, the conductor 20 specifically includes a fixed section 21 and a bistable bending section 22. The fixed section 21 refers to the part that remains fixed during the stretching process of the screen body. The bistable bending section 22 refers to the part that can move relative to the fixed section 21 and deform itself during the stretching process. Thus, the bistable bending section 22 has a bending notch 23, and the stretching adjustment of the screen body is completed by changing the shape of the notch 23.

[0047] Optionally, the first state of the display panel refers to the state before stretching. At this time, the multiple pixel islands 10 are close to each other and the notch 23 of the bistable bending section 22 faces the pixel island 10 connected to it, reaching a stable state, and the size of the screen will no longer change. When switching to the second state, that is, when the display panel is in the stretched state, the multiple pixel islands 10 are far apart from each other, thereby completing the stretching process of the screen. The notch 23 of the bistable bending section 22 is away from the pixel island 10 connected to it, reaching a stable state, and the size of the screen will no longer change.

[0048] The so-called bistable bending segment 22 refers to the part that can deform when switching between the first state and the second state, and use its own bending characteristics to stretch or shrink the screen. However, regardless of whether it is in the first state or the second state, the bistable bending segment 22 can form a stable bending shape, thereby ensuring the structural stability of the display panel in the first state and the second state.

[0049] During the transition from the first state to the second state, the fixed segment 21 remains connected to the pixel island 10 without deformation. After being stretched, the bistable bending segment 22 gradually moves away from the connected pixel island 10, and the orientation of the notch 23 gradually moves away from the pixel island 10. Due to the movement of the bistable bending segment 22, the angle between it and the fixed segment 21 changes from the first angle to the second angle, that is, the angle between the two gradually increases until the notch 23 of the bistable bending segment 22 is fully stretched to the reverse state, thus realizing the transition between the two states and forming the stable state of the second state, that is, stabilizing the stretched state.

[0050] This invention provides a display panel that uses a structure consisting of a fixed segment 21 and a bistable bending segment 22 for the wires 20 connecting adjacent pixel islands 10. The fixed segment 21 connects to the pixel islands 10, and the bistable bending segment 22 can move relative to the fixed segment 21, enabling overall stretching of the display panel. By adjusting the angle between the fixed segment 21 and the bistable bending segment 22, the display panel can switch between a first state and a second state. Because the bistable bending segment 22 has a notch 23, the pixel islands 10 can freely switch states before and after stretching. The stability of the bistable bending segment 22 itself ensures that the display panel has a stable structure in both the first and second states, improving the stability of the display panel before and after stretching. Furthermore, due to the bending capability of the bistable bending segment 22, this structure can prevent breakage caused by excessive stretching of the wires 20, improving the safety and stability of the connection between adjacent pixel islands 10 and providing reliable assurance for stable display before and after stretching, thereby improving the overall display effect before and after stretching.

[0051] As an optional embodiment, please refer to Figure 1 and Figure 2 and combined Figure 3 The conductor 20 includes two sets of fixed sections 21 and bistable bending sections 22, with the two bistable bending sections 22 located between the two fixed sections 21; the conductor 20 also includes a connecting section 24, which connects the two bistable bending sections 22. In a first state, the notches 23 of the two sets of bistable bending sections 22 are opposite to each other, and in a second state, the notches 23 of the two sets of bistable bending sections 22 are facing each other.

[0052] In this embodiment, the conductor 20 is configured as a connection structure of two sets of fixed segments 21 and bistable bending segments 22. That is, one set of fixed segments 21 and bistable bending segments 22 is used to connect one pixel island 10, and the other set of fixed segments 21 and bistable bending segments 22 is used to connect the adjacent pixel island 10. The two sets of fixed segments 21 and bistable bending segments 22 are connected by connecting segments 24, so that the conductor 20 forms an integral structure.

[0053] In the first state, the notches 23 of the two sets of bistable bending segments 22 each face the pixel island 10 connected to them, that is, the two sets of notches 23 are set away from each other. During the stretching process, the fixed segment 21 always maintains its own shape and does not deform. The bistable bending segment 22 rotates relative to the fixed segment 21 and the angle between the two gradually increases. At this time, the notches 23 of the bistable bending segment 22 also gradually deform until the notches 23 deform in the opposite direction, reaching the final stretching steady state.

[0054] During the stretching process, one set of fixed segments 21 and bistable bending segments 22 drive another set of fixed segments 21 and bistable bending segments 22 through the middle connecting segment 24. When subjected to the transmitted tensile force, the spacing between the pixel islands 10 gradually increases until the notch 23 of each bistable bending segment 22 deforms in the opposite direction, achieving a stable state after stretching, thus realizing the bistable effect of the screen before and after stretching.

[0055] Optionally, the fixed section 21, the bistable bending section 22 and the connecting section 24 are integrally formed. Since the above three together constitute the conductor 20, the material can be metal, and the overall etching can be completed by etching process during forming.

[0056] Optionally, the two sets of fixed segments 21 and bistable bending segments 22 are symmetrically distributed with the center line of the gap between two adjacent pixel islands 10 as the axis. When forming the symmetrical structure of the conductor 20, the spacing between the pixel islands 10 is more uniform, reducing the problem of uneven distribution of the pixel islands 10 before and after stretching.

[0057] This invention provides a display panel that further improves the usable space between adjacent pixel islands 10 by setting the conductor 20 to a structure of two sets of fixed segments 21 and bistable bending segments 22, so that the pixel islands 10 can be fully stretched after stretching, while improving the connection stability between pixel islands 10 and providing a reliable guarantee for bistable stretching.

[0058] As an optional embodiment, one end of the fixed segment 21 is connected to the pixel island 10 and the other end is connected to one end of the bistable curved segment 22. The other end of the bistable curved segment 22 is connected to the connecting segment 24. Optionally, in the first state, the end of the connecting segment 24 connected to the bistable curved segment 22 is spaced apart from the pixel island 10.

[0059] Considering that the conductor 20 needs to be insulated from the pixel island 10 before and after stretching, and only forms a connection with the pixel island 10 through the fixed section 21 to complete the current transmission, especially in the first state, the pixel islands 10 shrink each other. At this time, the bistable bending section 22 moves towards its respective pixel island 10 and the notch 23 faces the pixel island 10, and the distance between the middle connecting section 24 and the pixel island 10 reaches the shortest.

[0060] It should be noted that in order to prevent other parts of the wire 20 from short-circuiting with the pixel island 10, the parts of the wire 20 except for the fixed section 21 need to be spaced apart from the pixel island 10. The connecting section 24 needs to form a gap with the pixel islands 10 on both sides to prevent the middle connecting section 24 from contacting the pixel island 10.

[0061] Optionally, the distance between the end of the connecting segment 24 and the pixel island 10 is 15μm-16μm. This application does not impose any special limit on the specific value of the above-mentioned distance, as long as it meets the actual insulation requirements.

[0062] This invention provides a display panel that improves the safety and stability of the screen before and after stretching by setting the middle connecting segment 24 and the pixel island 10 at intervals and maintaining a safe distance, preventing short circuits between the pixel islands 10, and further improving the overall safety performance.

[0063] As an optional embodiment, please refer to Figure 1 and Figure 2 and combined Figure 3 Two wires 20 connect two adjacent pixel islands 10, and the distance between two fixed segments 21 connected on the same side of the pixel island 10 gradually increases in the direction away from the pixel island 10.

[0064] In this embodiment, two wires 20 are provided between two adjacent pixel islands 10 to meet different signal transmission requirements. The fixed segments 21 on the two wires 20 extend away from each other, thereby providing a wider extension space between the two pixel islands 10 to facilitate the switching between the first state and the second state.

[0065] Optionally, the bistable bending sections 22 of the two conductors 20 extend toward each other in a direction away from their respective connected fixed sections 21, so that during the stretching process, the two conductors 20 jointly complete the steady-state adjustment of the screen.

[0066] Considering the insulation between the two conductors 20, and to prevent the two conductors 20 from contacting and causing a short circuit, the connecting segments 24 of the two conductors 20 are optionally spaced apart from each other. Specifically, a gap is formed at the location of the connecting segments 24 to avoid contact between the two.

[0067] Optionally, the fixed segment 21 and the bistable bending segment 22 of each of the two conductors 20 are arranged to form an adjustment cavity 30. In the first state, the notch 23 of the bistable bending segment 22 faces the adjustment cavity 30, and in the second state, the notch 23 of the bistable bending segment 22 faces away from the adjustment cavity 30.

[0068] This invention provides a display panel that, by connecting two wires 20 between two adjacent pixel islands 10, not only achieves different signal transmissions but also improves the connection stability between pixel islands 10, facilitating the completion of the bistable adjustment process of the screen.

[0069] As an optional embodiment, please refer to Figure 3 and Figure 4 The display panel includes an insulating layer 40, which is disposed between the connection segment 24 of the two conductors 20.

[0070] Considering that the two wires 20 connected between the pixel island 10 need to maintain a certain degree of insulation, in this embodiment, in addition to setting the connecting segments 24 of the two wires 20 at intervals, an insulating layer 40 is further added. The insulating layer 40 is sandwiched between the two connecting segments 24, thereby further ensuring the insulation between the two.

[0071] Optionally, the two conductors 20 are arranged relative to the insulation layer 40 and are symmetrically distributed with respect to it as an axis; the symmetrical arrangement of the two conductors 20 makes the whole more uniform and has better stability during the stretching process, preventing tensile instability caused by structural factors.

[0072] Optionally, the insulation layer 40 may include polyimide material. This application does not impose any special limitations on the specific material of the insulation layer 40, as long as it can effectively improve the insulation capacity between the conductors 20.

[0073] Optionally, the thickness of the insulating layer 40 includes 5μm-10μm, mainly taking into account the space utilization between pixel islands 10 and the stability of the connection between wires 20. This application does not impose a special limit on the specific thickness value of the insulating layer 40, which can be determined according to the actual insulation requirements.

[0074] This invention provides a display panel that achieves connection between adjacent wires 20 by setting an insulating layer 40 between the connection segments 24 of two wires 20, while further improving the insulation performance between the wires 20, preventing display abnormalities caused by short circuits between the wires 20, and having better safety and reliability.

[0075] As an optional embodiment, please refer to Figure 1 and Figure 2 and combined Figure 3Multiple pixel islands 10 are arranged in an array on a flexible substrate along a first direction X and a second direction Y. The first direction X and the second direction Y intersect. The wire 20 includes a first wire 1 and a second wire 2. The first wire 1 connects two adjacent pixel islands 10 along the first direction X, and the second wire 2 connects two adjacent pixel islands 10 along the second direction Y.

[0076] Optionally, the multiple pixel islands 10 on the flexible substrate can be arranged in an array along the first direction X and the second direction Y. The same pixel island 10 needs to be connected to the pixel islands 10 in the first direction X and the pixel islands 10 in the second direction Y at the same time. Therefore, a first wire 1 and a second wire 2 need to be led out from the same pixel island 10. The first wire 1 is used to connect to the pixel island 10 in the first direction X, and the second wire 2 is used to connect to the pixel island 10 in the second direction Y. The first wire 1 and the second wire 2 can transmit different electrical signals.

[0077] In the final arrangement of multiple pixel islands 10, the first wire 1 is used to connect the multiple pixel islands 10 in the row direction, and the second wire 2 is used to connect the multiple pixel islands 10 in the column direction. Optionally, the first wire 1 and the second wire 2 can be led out from different positions of the same pixel island 10. This application does not limit this and needs to be determined according to the actual structural design.

[0078] This invention provides a display panel that connects the pixel islands 10 in the first direction X and the second direction Y by leading out the first wire 1 and the second wire 2 on the same pixel island 10. This satisfies the overall connection requirements of the arrayed pixel islands 10, better adapts to the stretching of the arrayed pixel islands 10, and meets the stretching stability requirements of the screen body with different arrangements of pixel islands 10.

[0079] As an optional embodiment, please refer to Figure 1 and Figure 2 and combined Figure 3 The orthographic projection of the pixel island 10 on the flexible substrate is rectangular and includes four vertices. The fixed segments 21 of the first conductor 1 and the second conductor 2 are respectively connected to the same vertices of the pixel island 10 and are spaced apart from each other.

[0080] Optionally, the pixel island 10 can be a rectangular opening structure, so that the pixel island 10 has four vertices. In order to make the same pixel island 10 connected to the pixel island 10 in the first direction X and the second direction Y respectively, the first wire 1 and the second wire 2 can be led out from the same vertices of the pixel island 10.

[0081] Specifically, the fixed segments 21 of the first conductor 1 and the second conductor 2 are connected to the top corner of the pixel island 10 respectively. It should be noted that the two fixed segments 21 need to be spaced apart to avoid short circuits between the first conductor 1 and the second conductor 2. Optionally, the two fixed segments 21 can be arranged in parallel, and the distance between the fixed segments 21 of the first conductor 1 and the second conductor 2 is 12μm-13μm. This application does not impose a specific value on the distance, as long as it can form a safe and reliable insulation distance.

[0082] Optionally, the first wire 1 and the second wire 2 can be led out from the four corners of the same pixel island 10 to complete the connection in the first direction X and the second direction Y. Of course, the wire 20 can also be led out selectively according to the actual connection requirements.

[0083] This invention provides a display panel that, by simultaneously leading out the first conductor 1 and the second conductor 2 from the same apex, achieves connection with the pixel islands 10 in the first direction X and the second direction Y, saves the lead-out space of the conductor 20, and also facilitates the etching process.

[0084] As an optional embodiment, please refer to Figure 3 The bistable bending segment 22 includes a first part 22a and a second part 22b. The bistable bending segment 22 is connected to the fixed segment 21 through the first part 22a. In a first state, the first part 22a forms a notch 23 facing the fixed segment 21 and the second part 22b forms a reverse protrusion. In a second state, the first part 22a forms a notch 23 away from the fixed segment 21 and the second part 22b forms a reverse protrusion. The length of the first part 22a is greater than the length of the second part 22b.

[0085] Optionally, based on setting the bistable bending segment 22 to have a notch 23, the bistable bending segment 22 can be further divided into a first part 22a and a second part 22b. Whether in the first state or the second state, the first part 22a and the second part 22b form opposite convex profiles.

[0086] Specifically, the bistable bending segment 22 is connected to the fixed segment 21 through the first part 22a. The first part 22a has the aforementioned notch 23, and the second part 22b has the opposite protrusion. During the process of switching from the first state to the second state, the notch 23 of the first part 22a deforms in the direction of the second part 22b, and the two parts deform synchronously, so that the two parts deform synchronously. The bistable bending segment 22 can be understood as an approximate S-shaped structure.

[0087] The length of the first part 22a is greater than the length of the second part 22b. In other words, the notch 23 of the bistable bending segment 22 occupies more length, so that the notch 23 can better play the role of deformation and drive the adjacent pixel island 10 to complete the stretching action. This application does not make any special limitation on the length occupied by the first part 22a and the second part 22b.

[0088] This invention provides a display panel by setting a first part 22a and a second part 22b with opposite convex contours for the bistable bending segment 22. The deformation of the first part 22a and the second part 22b drives the stretching between the pixel islands 10, thereby completing the switching between the first state and the second state. The first part 22a and the second part 22b can better absorb the elastic stress brought by the bending deformation, which helps to disperse the stress and complete the above deformation process more safely and effectively, avoiding stress concentration and having better safety performance.

[0089] As an optional embodiment, please refer to Figure 5 The bistable bending section 22 includes a spring sheet structure and is made of elastic metal.

[0090] Optionally, the bistable bending section 22 is made of Ti / Al / Ti composite metal. This application does not impose any special restrictions on the specific material used for the bistable bending section 22, as long as it can exert its own elastic effect.

[0091] By utilizing the elasticity of the elastic metal itself, during the transition from the first state to the second state, the elasticity of the bistable bending segment 22 enables the deformation of the notch 23, thereby driving the pixel islands 10 to complete the spacing adjustment between each other, so that the screen can reach a stable state in both the first and second states, achieving a bistable display effect.

[0092] This invention provides a display panel that uses a bistable bending segment 22 as a spring sheet structure. By utilizing its own elasticity, the spacing between the pixel islands 10 is adjusted, effectively achieving the stretching and contraction of the screen. This allows the screen to better maintain its first and second states, achieving a bistable effect and improving display stability in both states.

[0093] According to an embodiment of the present invention, a display device is provided, including a display panel as described above.

[0094] This invention provides a display panel and a display device. By configuring the wires connecting adjacent pixel islands into a structure of fixed segments and bistable curved segments, and by connecting the fixed segments to the pixel islands while allowing the bistable curved segments to move relative to the fixed segments, the overall stretching of the display panel is achieved. By adjusting the angle between the fixed segments and the bistable curved segments, the display panel can switch between a first state and a second state. Due to the notch structure of the bistable curved segments, the pixel islands can freely switch states before and after stretching. Utilizing the inherent stability of the bistable curved segments, the display panel has a stable structure in both the first and second states, improving the stability of the display panel before and after stretching. Furthermore, due to the bending capability of the bistable curved segments, this structure can also prevent breakage or damage caused by excessive stretching of the wires, improving the safety and stability of the connection between adjacent pixel islands and providing reliable assurance for stable display before and after stretching, thereby improving the overall display effect before and after stretching.

[0095] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: Multiple pixel islands, each of which includes a pixel circuit and a light-emitting unit; Multiple connecting bridges connect adjacent pixel islands. Each connecting bridge includes wires connecting the pixel circuits on the adjacent pixel islands. Each connecting bridge includes a fixed section and a bistable curved section that are connected to each other. One end of the fixed section is connected to the pixel island and the other end extends out of the pixel island and is connected to the bistable curved section.

2. The display panel according to claim 1, characterized in that, The bistable bending segment is bent and configured such that, in a first state, the bistable bending segment protrudes outward from the fixing part; and in a second state, the bistable bending segment protrudes inward toward the fixing part. Preferably, the connecting bridge includes two sets of fixed sections and bistable bending sections, and the two bistable bending sections are connected between two corresponding fixed sections; Preferably, the connecting bridge further includes a connecting segment connecting the two bistable bending segments. In the first state, the two sets of bistable bending segments are convex outward from their respective fixed segments, and in the second state, the two sets of bistable bending segments are convex inward toward their respective fixed segments. Preferably, the fixed section, the bistable bending section, and the connecting section are an integral structure; Preferably, the two sets of fixed segments and the bistable bending segments are axisymmetric structures.

3. The display panel according to claim 2, characterized in that, One end of the fixed segment is connected to the pixel island and the other end is connected to one end of the bistable curved segment, and the other end of the bistable curved segment is connected to the connecting segment; Preferably, in the first state, the end of the connecting segment that connects to the bistable curved segment is spaced apart from the pixel island; Preferably, the distance between the end and the pixel island is 15μm-16μm.

4. The display panel according to claim 3, characterized in that, Two wires connect two adjacent pixel islands, and the distance between two fixed segments connected to the same side of the pixel island gradually increases in the direction away from the pixel island. Preferably, the bistable bending segments of the two conductors extend toward one side opposite to each other in a direction away from their respective fixed segments; Preferably, the connecting segments of the two wires are spaced apart from each other; Preferably, the fixed segment and the bistable bending segment of each of the two conductors enclose an adjustment cavity. In the first state, the bistable bending segment protrudes away from the adjustment cavity, and in the second state, the bistable bending segment protrudes toward the adjustment cavity.

5. The display panel according to claim 4, characterized in that, The display panel includes an insulating layer disposed between the connecting segments of the two wires; Preferably, the two wires are arranged relative to the insulation layer and are symmetrically distributed with respect to it as an axis; Preferably, the insulating layer comprises a polyimide material; Preferably, the thickness of the insulating layer includes 5μm-10μm.

6. The display panel according to claim 1, characterized in that, The plurality of pixel islands are arranged in an array along a first direction and a second direction, the first direction and the second direction intersect, and the wire includes a first wire and a second wire, the first wire connecting two adjacent pixel islands along the first direction, and the second wire connecting two adjacent pixel islands along the second direction.

7. The display panel according to claim 6, characterized in that, The pixel island is rectangular and includes four vertices. The fixed segments of the first wire and the second wire are respectively connected to the same vertices of the pixel island and are spaced apart from each other. Preferably, the spacing between the fixed segments of the first conductor and the second conductor is 12μm-13μm.

8. The display panel according to claim 1, characterized in that, The bistable bending segment includes a first part and a second part. The bistable bending segment is connected to the fixed segment through the first part. In a first state, the first part protrudes outward from the fixed segment and the second part protrudes inward toward the fixed segment. In a second state, the first part protrudes inward toward the fixed segment and the second part protrudes outward from the fixed segment. The length of the first part is greater than the length of the second part.

9. The display panel according to claim 1, characterized in that, The bistable bending section is made of Ti / Al / Ti composite metal.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

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