Display device and preparation method thereof

Abstract

The invention discloses a display device and a preparation method thereof, the display device is provided with a main display area (ZAA) and an auxiliary display area (FAA) at least partially surrounding the periphery of the main display area (ZAA), and the main display area (ZAA) and the auxiliary display area (FAA) are arranged at an interval; the display device comprises a flexible display panel (100), wherein the flexible display panel (100) comprises a main display panel (101) and an auxiliary display panel (102); the main display panel (101) is arranged in the main display area (ZAA); the auxiliary display panel (102) is arranged in the auxiliary display area (FAA), the display surface of the auxiliary display panel (102) is arranged to be an inclined surface, and the extension surface of the display surface of the auxiliary display panel (102) intersects on the side, away from the auxiliary display panel (102), of the main display panel (101) to form a virtual vertex or a virtual straight line. The ratio of the distance between the virtual vertex or the virtual straight line and the display surface of the main display panel (101) to the distance between the center point of the main display panel (101) and the boundary line is greater than or equal to 0.2 and less than or equal to 12. The display device is high in display and touch efficiency.

Description

Display device and manufacturing method thereof Technical Field

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

[0002] With the development of technology, conventional wearable mobile display devices, such as smart watches, are becoming more and more similar to mobile phones in terms of functionality. They are used either alone or in conjunction with corresponding smartphones, and are favored by more and more consumers.

[0003] However, current display devices operate inefficiently.

[0004] 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.

[0005] Summary of the Invention

[0006] The purpose of the present disclosure is to overcome the above-mentioned deficiencies of the prior art and to provide a display device and a method for manufacturing the same.

[0007] According to one aspect of the present disclosure, a display device is provided, comprising a primary display area and a secondary display area at least partially surrounding the primary display area, wherein the primary display area and the secondary display area are spaced apart; the display device comprises:

[0008] A flexible display panel, comprising:

[0009] A main display panel, provided in the main display area;

[0010] A secondary display panel is provided in the secondary display area, the display surface of the secondary display panel is set as a slope, and the extended surface of the display surface of the secondary display panel intersects on the side of the main display panel away from the secondary display panel to form a virtual vertex or a virtual straight line, and the ratio of the distance between the virtual vertex or the virtual straight line and the display surface of the main display panel to the distance between the center point of the main display panel and the boundary line is greater than or equal to 0.2 and less than or equal to 12.

[0011] In an exemplary embodiment of the present disclosure, the auxiliary display panel includes a first display portion and a second display portion connected to each other, and the flexible display panel further includes:

[0012] The connecting portion is connected between the first display portion and the main display panel, and the second display portion is spaced apart from the main display panel.

[0013] In an exemplary embodiment of the present disclosure, a plurality of via holes are provided on the connecting portion, or the connecting portion includes:

[0014] At least two connecting bars, one end of each connecting bar is connected to the main display panel, and the other end of each connecting bar is connected to the first display portion.

[0015] In an exemplary embodiment of the present disclosure, the connecting strip is configured to be curved.

[0016] In an exemplary embodiment of the present disclosure, the plurality of via holes are arranged along an arc with equal rotation angles.

[0017] In an exemplary embodiment of the present disclosure, the subsidiary display panel has a disconnection portion, and the disconnection portion and the connection portion are arranged on opposite sides of the main display panel.

[0018] In an exemplary embodiment of the present disclosure, the flexible display panel further includes:

[0019] The first binding portion is connected to the main display panel and extends to the disconnecting portion. A plurality of binding pins are provided on the first binding portion.

[0020] In an exemplary embodiment of the present disclosure, the display device further includes:

[0021] A cover plate is provided on the display surface of the flexible display panel, and the cover plate includes:

[0022] A main panel, provided in the main display area;

[0023] An edge plate is provided in the auxiliary display area, the edge plate is connected to the periphery of the main plate, and a surface of the edge plate close to the flexible display panel is in contact with the display surface of the auxiliary display panel.

[0024] In an exemplary embodiment of the present disclosure, an angle between a surface of the edge plate close to the flexible display panel and a surface of the main plate close to the flexible display panel is greater than 90 degrees and less than or equal to 179 degrees.

[0025] In an exemplary embodiment of the present disclosure, on a first reference plane, a distance between one end of the edge plate close to the main plate and the main plate is greater than or equal to 0.017 mm, and the first reference plane is parallel to the display surface of the main display panel.

[0026] In an exemplary embodiment of the present disclosure, the cover plate further includes:

[0027] A connecting plate is connected between the main plate and the edge plate, the Gaussian curvature of the connecting plate is positive, and the connecting portion is attached to the connecting plate.

[0028] In an exemplary embodiment of the present disclosure, the display device further includes:

[0029] The first shielding portion is provided on a side of the cover plate close to the flexible display panel, and the first shielding portion is located between the main display area and the auxiliary display area.

[0030] In an exemplary embodiment of the present disclosure, the display device further includes:

[0031] The second shielding portion is provided on a side of the cover plate close to the flexible display panel and located on a side of the auxiliary display area away from the main display area.

[0032] In an exemplary embodiment of the present disclosure, the display device further includes:

[0033] The third shielding portion is provided on a side of the cover plate close to the flexible display panel and connected between the first shielding portion and the second shielding portion. The third shielding portion at least covers the disconnected portion.

[0034] In an exemplary embodiment of the present disclosure, the first blocking portion is an ink layer, the second blocking portion is an ink layer, and the third blocking portion is an ink layer.

[0035] In an exemplary embodiment of the present disclosure, the length and width of a cross-section of the display surface of the secondary display panel on a first reference plane increase with increasing distance from the main display panel in a second direction, the first reference plane is parallel to the display surface of the main display panel, and the second direction is perpendicular to the first reference plane.

[0036] In an exemplary embodiment of the present disclosure, the display surface of the auxiliary display panel is a truncated conical surface or a truncated pyramidal surface.

[0037] In an exemplary embodiment of the present disclosure, an orthographic projection of a virtual vertex of the truncated conical surface or the truncated pyramidal surface on the main display panel coincides with a center point of the main display panel.

[0038] In an exemplary embodiment of the present disclosure, the main display panel is configured as a rounded rectangle, and the auxiliary display panel includes:

[0039] The first sub-display panel is configured as a rectangle;

[0040] The second sub-display panel is configured to be in a partial conical ring shape.

[0041] In an exemplary embodiment of the present disclosure, four first sub-display panels are set, four second sub-display panels are set, and the second sub-display panels are connected between two adjacent first sub-display panels; the two first sub-display panels located on opposite sides of the main display panel have the same angle with the first reference plane, and the extended surfaces of the two first sub-display panels located on opposite sides of the main display panel intersect to form a virtual straight line, and the extended surfaces of the four first sub-display panels intersect to form two virtual straight lines, and the two virtual straight lines are arranged vertically.

[0042] According to another aspect of the present disclosure, a method for preparing a display device is provided, comprising:

[0043] Providing a flexible display screen and a carrier film, and attaching the flexible display screen to the carrier film;

[0044] Cutting the flexible display screen and the carrier film to form a patterned display screen and a patterned carrier film, wherein the patterned display screen includes a main display portion and a sub-display portion, and both the main display portion and the sub-display portion are in a flat plate shape;

[0045] The patterned display screen and the patterned carrier film are contoured so that the main display portion is located in the main display area to form a main display panel, and the auxiliary display portion is located in the auxiliary display area to form a auxiliary display panel, wherein the display surface of the auxiliary display panel is formed into an inclined surface; at least a portion of the auxiliary display area is disposed around the periphery of the main display area, and the main display area and the auxiliary display area are spaced apart;

[0046] In which, the extended surface of the display surface of the auxiliary display panel intersects on the side of the main display panel away from the auxiliary display panel to form a virtual vertex or a virtual straight line, and the ratio of the distance between the virtual vertex or the virtual straight line and the display surface of the main display panel to the distance between the center point of the main display panel and the boundary line is greater than or equal to 0.2 and less than or equal to 12.

[0047] In an exemplary embodiment of the present disclosure, the auxiliary display portion includes a first portion and a second portion connected to each other, and the patterned display screen further includes:

[0048] A connecting structure is connected between the first portion and the main display portion, a first gap is provided between the second portion and the main display portion, and the connecting structure is contoured to form a connecting portion.

[0049] In an exemplary embodiment of the present disclosure, the width of the first gap in the radial direction increases as the distance from the connection structure increases.

[0050] In an exemplary embodiment of the present disclosure, the auxiliary display portion has a disconnection structure, and the disconnection structure and the connection structure are arranged on opposite sides of the main display portion.

[0051] In an exemplary embodiment of the present disclosure, the patterned display screen further includes:

[0052] The first binding structure is connected to the main display panel and extends into the disconnection structure. A plurality of binding pins are provided on the first binding structure, and the first binding structure is shaped to form a first binding portion.

[0053] In an exemplary embodiment of the present disclosure, the patterned carrier film includes:

[0054] A main bearing portion, used for bearing the main display portion;

[0055] a first bearing portion, connected to the main bearing portion, and configured to bear the connecting structure and the first portion;

[0056] Two second bearing parts are provided and are arranged on opposite sides of the main bearing part, the second bearing parts are spaced apart from the main bearing part, and the second bearing parts are used to carry the second part;

[0057] a third bearing portion, connected to the main bearing portion, and configured to bear the first binding structure;

[0058] The first bearing portion, the second bearing portion and the third bearing portion are spaced apart from each other.

[0059] In an exemplary embodiment of the present disclosure, the main display portion is configured as a circle, and the auxiliary display portion is configured as a fan-shaped ring; before cutting the flexible display screen and the carrier film, the preparation method further includes:

[0060] The parameters of the patterned display screen are calculated using a calculation formula, wherein the calculation formula includes:

[0061] L0=r0*θ;

[0062] D=RW-L0-r1;

[0063] r3=r1+r0*Sinθ+W1*cosθ;

[0064] R = r3 / cosθ;

[0065] Wherein, R is the radius of the edge line of the secondary display portion away from the main display portion in a planar state, β is the central angle corresponding to the disconnection structure in a planar state, D is the distance between the center of the secondary display portion and the center of the main display portion in a planar state, and L0 is the radial width of the connection structure in a planar state; L out L is the length of the edge line of the auxiliary display panel away from the main display panel; in is the length of the edge line of the auxiliary display panel close to the main display panel; r0 is the curvature radius of the connecting portion in the three-dimensional state; r1 is the radius of the main display panel, W is the radial width of the auxiliary display panel; θ is the angle between the auxiliary display panel and the first reference plane in the three-dimensional state.

[0066] In an exemplary embodiment of the present disclosure, the main display portion is configured as a rounded rectangle, and the auxiliary display portion includes:

[0067] The first sub-display portion is configured as a rectangle;

[0068] The second sub-display portion is configured in a fan-shaped shape, and a central angle corresponding to the second sub-display portion is greater than 0° and less than 90°.

[0069] In an exemplary embodiment of the present disclosure, the preparation method further comprises:

[0070] A cover plate is provided, and the cover plate is attached to the display surface of the patterned display screen after profiling.

[0071] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0073] FIG1 is a schematic diagram of a three-dimensional structure of an exemplary embodiment of a display device disclosed herein.

[0074] FIG. 2 is a schematic top view of the display device in FIG. 1 .

[0075] FIG3 is a schematic cross-sectional view of the display device in FIG1 .

[0076] FIG4 is a schematic structural diagram of the flexible display panel in FIG1 .

[0077] FIG5 is a schematic structural diagram of an exemplary embodiment of a flexible display panel in a planar state.

[0078] FIG6 is a schematic structural diagram of another exemplary embodiment of a flexible display panel in a planar state.

[0079] FIG7 is a partial enlarged schematic diagram of the portion indicated by I in FIG6 .

[0080] 8 to 11 are schematic structural diagrams of the connection portion of the flexible display panel.

[0081] 12-14 are schematic diagrams of the definition of line curvature.

[0082] FIG15 is a schematic diagram of a three-dimensional structure of another exemplary embodiment of the display device disclosed herein.

[0083] FIG. 16 is a schematic top view of the display device in FIG. 15 .

[0084] FIG17 is a schematic structural diagram of the flexible display panel in FIG15 .

[0085] FIG18 is a schematic diagram of a layered structure of an exemplary embodiment of a flexible display panel.

[0086] FIG. 19 is a schematic diagram showing the layered structure of the functional layer group shown in FIG. 18 .

[0087] FIG. 20 is a schematic diagram of a layered structure of another exemplary embodiment of a flexible display panel.

[0088] FIG21 is a schematic cross-sectional view taken along line AA in FIG16 .

[0089] FIG22 is a schematic cross-sectional view taken along line BB in FIG16 .

[0090] FIG23 is a schematic flow chart of an exemplary embodiment of a method for manufacturing a display device according to the present disclosure.

[0091] FIG24 is a schematic diagram of the structure after the flexible display screen and the carrier film are bonded together.

[0092] FIG25 is a schematic diagram of the structure after the flexible display screen and the carrier film are cut.

[0093] FIG26 is a schematic diagram illustrating parameter annotations of a cross-sectional view of the display device disclosed herein.

[0094] FIG27 is a schematic diagram of parameter annotation of a top view of the flexible display panel of the display device of the present disclosure.

[0095] FIG28 is a schematic diagram showing the structure of the flexible display panel in FIG27 in a planar state and parameter annotations.

[0096] FIG29 is a structural diagram of an exemplary embodiment of the flexible display panel in FIG15 in a planar state.

[0097] FIG30 is a structural diagram of another exemplary embodiment of the flexible display panel in FIG15 in a planar state.

[0098] Explanation of Reference Numerals: 100, flexible display panel; 101, main display panel; 102, auxiliary display panel; 1021, first display portion; 1022, second display portion; 1023, disconnection portion; 1024, first sub-display panel; 1025, second sub-display panel; 103, connection portion; 1031, via hole; 1032, connection bar; 104, first binding portion; 105, second gap; 106, second binding portion; 1, base layer; 2, display function layer group; 21, driving backplane; 211, light shielding layer; 212, buffer layer; 2131, channel portion; 2132, source connection portion; 2133, drain connection portion; 214, gate insulating layer; 215, gate electrode; 216, interlayer dielectric layer; 217, first connecting conductor layer; 2171, source electrode; 2172, drain electrode; 218, planarization layer; 22. Light-emitting substrate; 221. First electrode; 222. Pixel definition layer; 223. Light-emitting layer group; 224. Second electrode; 23. Encapsulation layer group; 231. First inorganic layer; 232. Organic layer; 233. Second inorganic layer; 24. Touch layer group; 241. First touch layer; 242. Touch insulation layer; 243. Second touch layer; 244. Protective cover layer; 25. Polarizer; 3. First adhesive layer; 4. Protective layer; 5. Second adhesive layer; 6. Touch functional layer; 7. Cover plate; 71. Main body plate; 72. Edge plate; 73. Connecting plate; 81. First shielding portion; 82. Second shielding portion; 83. Third shielding portion; 9. Back functional layer; 200, flexible display screen; 300, patterned display screen; 301, main display part; 302, auxiliary display part; 3021, first part; 3022, second part; 3023, disconnection structure; 3023, first sub-display part; 3024, second sub-display part; 303, connection structure; 304, first gap; 305, first binding structure; 400, carrying film; 500, patterned carrying film; 501, first carrying part; 502, second carrying part; 503, third carrying part; ZAA, main display area; FAA, auxiliary display area; Y, second direction. DETAILED DESCRIPTION

[0099] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0100] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0101] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0102] In this application, unless otherwise specified or limited, the term "connected" should be understood broadly. For example, "connected" can mean fixed, removable, or integrated; it can be directly connected or indirectly connected through an intermediary. "And / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0103] An exemplary embodiment of the present disclosure provides a display device, as shown in Figures 1 to 30, wherein the display device includes a main display area ZAA and a sub-display area FAA at least partially surrounded by the main display area ZAA, and the main display area ZAA and the sub-display area FAA are spaced apart from each other; the display device may include a flexible display panel 100, and the flexible display panel 100 may include a main display panel 101 and a sub-display panel 102; the main display panel 101 is provided in the main display area ZAA; the sub-display panel 102 is provided in the sub-display area FAA, the display surface of the sub-display panel 102 is provided as an inclined surface, and an extension surface of the display surface of the sub-display panel 102 intersects on a side of the main display panel 101 away from the sub-display panel 102 to form a virtual vertex or a virtual straight line, and the ratio of the distance between the virtual vertex or the virtual straight line and the display surface of the main display panel 101 to the distance between the center point of the main display panel 101 and the boundary line is greater than or equal to 0.2 and less than or equal to 12.

[0104] The display device disclosed in the present invention, on the one hand, has a main display area ZAA and a sub-display area FAA at least partially surrounded by the periphery of the main display area ZAA, so that the display surface of the display device is increased, thereby improving the display and touch efficiency of the display device; on the other hand, the main display area ZAA and the sub-display area FAA are arranged at intervals, so that the main display area ZAA and the sub-display area FAA do not affect each other, and when a touch operation is performed in the sub-display area FAA, the main display area ZAA will not be blocked, thereby not affecting the display image of the main display area ZAA; on the other hand, the display surface of the sub-display panel 102 is set as a slope, even if the sub-display area FAA is added, the volume of the display device will not increase too much, thereby ensuring the wearability of the display device.

[0105] In this example embodiment, as shown in Figures 1 and 2, the main display area ZAA can be configured as a circle, and correspondingly, the auxiliary display area FAA can be configured as a conical ring. In addition, in some other example embodiments of the present disclosure, the main display area ZAA can be configured as an elliptical shape, and correspondingly, the auxiliary display area FAA can be configured as an elliptical conical ring; the main display area ZAA can be configured as a polygon, and correspondingly, the auxiliary display area FAA can be configured as a pyramidal ring. Of course, the main display area ZAA and the auxiliary display area FAA can also be configured as other shapes, which will not be described one by one here. Moreover, the display surface of the auxiliary display area FAA is configured as a bevel.

[0106] In this example embodiment, the display device may include a flexible display panel 100. As shown in FIG3 and FIG4 , the flexible display panel 100 may include a main display panel 101 and a sub-display panel 102. The main display panel 101 is disposed in a main display area ZAA. The main display panel 101 is configured in a flat plate shape, while the display surface of the main display panel 102 is flat. The main display panel 101 is configured to have a shape that matches the main display area ZAA. For example, the main display area ZAA may be configured in a circular shape, and accordingly, the main display panel 101 may be configured in a circular shape; the main display area ZAA may be configured in an elliptical shape, and accordingly, the main display panel 101 may be configured in an elliptical shape; the main display area ZAA may be configured in a polygonal shape, and accordingly, the main display panel 101 may be configured in a polygonal shape. Furthermore, the display surface of the main display panel 101 forms the main display area ZAA, i.e., the area surrounded by the edge of the display surface of the main display panel 101 constitutes the main display area ZAA.

[0107] The secondary display panel 102 is disposed in the secondary display area FAA. The secondary display panel 102 is configured to have a shape that matches the secondary display area FAA. For example, the secondary display area FAA can be configured to have a conical ring shape, and accordingly, the secondary display panel 102 can be configured to have a conical ring shape; the secondary display area FAA can be configured to have an elliptical cone ring shape, and accordingly, the secondary display panel 102 can be configured to have an elliptical cone ring shape; the secondary display area FAA can be configured to have a pyramid ring shape, and accordingly, the secondary display panel 102 can be configured to have a pyramid ring shape. Furthermore, the display surface of the secondary display panel 102 forms the secondary display area FAA, that is, the area surrounded by the edge line of the display surface of the secondary display panel 102 is the secondary display area FAA.

[0108] The width of the sub-display panel 102 is kept constant at all locations.

[0109] The display surface of the secondary display panel 102 is configured as an inclined surface. Furthermore, the length and width of the cross-section of the display surface of the secondary display panel 102 on the first reference plane increase with increasing distance from the primary display panel 101 in the second direction Y. In other words, the cross-section of the display surface of the secondary display panel 102 increases with distance from the primary display panel 101. This allows the display surface of the secondary display panel 102 to be positioned toward the primary display panel 101, providing convenience for users. The first reference plane is parallel to the display surface of the primary display panel 102, and the second direction Y is perpendicular to the first reference plane.

[0110] Furthermore, the display surface of the secondary display panel 102 is a truncated conical surface or a truncated pyramidal surface, as shown in Figures 1 to 3 , that is, the display surface of the secondary display panel 102 is a conical surface with the top portion removed. The conical surface can be a right conical surface, that is, the orthographic projection of the apex of the conical surface on the bottom surface is located at the center of the bottom surface; so that the tilt angle of each part of the secondary display panel 102 is the same, ensuring the uniformity of the display and touch of the secondary display panel 102. Alternatively, the display surface of the secondary display panel 102 is a pyramidal surface with the top portion removed. The pyramidal surface can be a right pyramidal surface, that is, the orthographic projection of the apex of the pyramidal surface on the bottom surface is located at the center of the bottom surface, so that the tilt angle of each part of the secondary display panel 102 is the same, ensuring the uniformity of the display and touch of the secondary display panel 102.

[0111] Moreover, the orthographic projection of the virtual vertex of the truncated cone surface or the truncated pyramid surface on the main display panel 101 coincides with the center point of the main display panel 101, that is, the center point of the main display panel 101 is collinear with the center point or center point of the bottom surface of the truncated cone surface or the truncated pyramid surface, further ensuring that the inclination angles of the auxiliary display panel 102 are the same at all locations, thereby ensuring the uniformity of display and touch of the auxiliary display panel 102.

[0112] It should be noted that the virtual vertex of the truncated conical surface or the truncated pyramidal surface is an intersection point formed by extending the truncated conical surface or the truncated pyramidal surface.

[0113] The ratio of the distance H between the virtual vertex of the truncated cone surface or the truncated pyramid surface and the display surface of the main display panel 101 to half the width K of the main display area ZAA is greater than or equal to 0.2 and less than 12, that is, the ratio of the height H of the triangle formed by the virtual vertex of the truncated cone surface or the truncated pyramid surface and the display surface of the main display panel 101 to half the width K of the base is greater than or equal to 0.2 and less than or equal to 12. In other words, the ratio of the distance H between the virtual vertex and the display surface of the main display panel 101 to the distance K between the center point of the main display panel 101 and the boundary line is greater than or equal to 0.2 and less than or equal to 12. For example, the ratio can be 0.5, 0.8, 1.2, 1.8, 2.3, 2.5, 3.1, 3.7, 4.2, 4.8, 5.3, 5.6, 6.1, 6.7, 7.1, 7.8, 8.2, 8.8, 9.3, 9.6, 10.1, 10.7, 11.1, 11.8, etc. If the ratio is too large, the inclination angle of the hypotenuse of the triangle is too large, and thus the inclination angle of the display surface of the auxiliary display panel 102 is too large, so that the display surface of the auxiliary display panel 102 is perpendicular to the first reference plane, which is not conducive to the user's touch operation and viewing of the auxiliary display panel 102. If the ratio is too small, the inclination angle of the hypotenuse of the triangle will be too small, thereby making the inclination angle of the display surface of the auxiliary display panel 102 too small, at least making the display surface of the auxiliary display panel 102 form a structure parallel to the first reference plane, so that the overall volume of the display device increases, which is not conducive to the portability of the wearable display device.

[0114] As shown in FIG4 , the secondary display panel 102 may include a first display portion 1021 and a second display portion 1022 connected to each other. Specifically, the second display portion 1022 may be provided as two and symmetrically connected to opposite sides of the first display portion 1021. That is, the second display portion 1022, the first display portion 1021, and the second display portion 1022 are sequentially connected to form the secondary display panel 102. This arrangement facilitates the design and calculation of the secondary display panel 102. Moreover, the secondary display panel 102 needs to be formed by bending, which can reduce bending stress, avoid warping of the secondary display panel 102, and ensure the display effect. In this case, the second display portion 1022 is provided as a fan-ring structure smaller than a semi-circular shape, that is, the central angle corresponding to the inner edge or outer edge of the second display portion 1022 is less than 90 degrees. Of course, in other exemplary embodiments of the present disclosure, the second display portion 1022 is provided as a single one, and the second display portion 1022 is connected to one side of the first display portion 1021. In this case, the second display portion 1022 is configured as a fan-ring structure larger than a semi-circular shape, that is, the central angle corresponding to the inner edge or the outer edge of the second display portion 1022 is larger than 90 degrees.

[0115] The auxiliary display panel 102 is connected to the main display panel 101 as a whole. Specifically, the flexible display panel 100 may further include a connecting portion 103, which is connected between the first display portion 1021 and the main display panel 101. The second display portion 1022 is spaced apart from the main display panel 101, so that a second gap 105 is provided between the second display portion 1022 and the main display panel 101, and the second gap 105 is also provided to be smaller than a semi-circular structure.

[0116] 5 and 6 , in order to clearly illustrate the specific structure of the connection portion 103 , the three-dimensional flexible display panel 100 is unfolded into a planar patterned display screen 300 . The planar connection structure 303 in the figure can be formed into a three-dimensional connection portion 103 by profiling.

[0117] As shown in Figures 5 and 6, the connection portion 103 may include at least two connection bars 1032. One end of each connection bar 1032 is connected to the main display panel 101, and the other end of each connection bar 1032 is connected to the first display portion 1021. The number of connection bars 1032 can be set as needed. As shown in Figure 5, the connection bars 1032 can be configured as straight bars. This configuration of the connection portion 103 provides a certain degree of stretchability, enabling better fit with the connection plate 73 of the cover plate 7.

[0118] 6 and 7 , the connecting strip 1032 is configured to be curved. Specifically, the connecting strip 1032 can be configured to be rectangular curved, i.e., a plurality of rectangular notches are spaced apart on opposite sides of the straight strip; the connecting strip 1032 can be configured to be curved in an arc shape, i.e., the connecting strip 1032 can include one, two, or more arc strips, with two adjacent arc strips smoothly connected. The curved connecting strip 1032 can also be a structure in which a rectangular curved strip is connected to an arc curved strip. The curved connecting strip 1032 can also have other shapes, which are not described here one by one. Similarly, the connecting portion 103 configured in this way has a certain degree of stretchability. It can better cooperate with the connecting plate 73 of the cover plate 7.

[0119] As shown in Figures 8-11 , the connecting portion 103 is provided with a plurality of vias 1031. The shapes of the vias 1031 can be rectangular, oval, round, cross-shaped, etc. The connecting portion 103 provided with multiple vias 1031 has a certain degree of stretchability. Similarly, it can better cooperate with the connecting plate 73 of the cover plate 7. The number of vias 1031 can be set as needed. The maximum dimension (including length, width, and diameter) of the vias 1031 is greater than or equal to 0.005 mm and less than or equal to 1 mm.

[0120] Furthermore, when the main display panel 101 is circular, the plurality of vias 1031 are arranged along an arc at equal rotation angles. The arc can be concentric with the center of the main display panel 101 or with the center of the auxiliary display panel 102. The centerlines of the plurality of vias 1031 pass through the center of the arc, and the angles between the centerlines of adjacent vias 1031 are the same, i.e., the plurality of vias 1031 are arranged along an arc at equal rotation angles, thereby ensuring uniform tensile properties throughout the connection portion 103.

[0121] When the main display panel 101 is configured as a rectangle, the plurality of via holes 1031 are arranged along a straight line and at equal intervals, or no via holes 1031 may be provided.

[0122] In this exemplary embodiment, referring again to FIG. 4 , the secondary display panel 102 has a disconnection portion 1023. Specifically, the disconnection portion 1023 is disposed between the two second display portions 1022. That is, the disconnection portion 1023 disconnects the secondary display panel 102 to form the two second display portions 1022. The disconnection portion 1023 and the connection portion 103 are disposed on opposite sides of the primary display panel 101, further ensuring that the two second display portions 1022 are symmetrically disposed, ensuring balanced stress on the secondary display panel 102, and thus ensuring excellent display and touch performance.

[0123] As shown in Figure 4, the flexible display panel 100 may also include a first binding portion 104, which is connected to the main display panel 101. The first binding portion 104 and the connecting portion 103 are arranged on opposite sides of the main display panel 101, that is, the first binding portion 104 is connected to the side of the main display panel 101 away from the connecting portion 103, and the first binding portion 104 extends to the disconnecting portion 1023, that is, the orthographic projection of the first binding portion 104 on the first reference plane overlaps with the orthographic projection of the disconnecting portion 1023 on the first reference plane. For example, the orthographic projection of the first binding portion 104 on the first reference plane may be located within the orthographic projection of the disconnecting portion 1023 on the first reference plane, or a part of the orthographic projection of the first binding portion 104 on the first reference plane may be located within the orthographic projection of the disconnecting portion 1023 on the first reference plane, so that a part of the first binding portion 104 extends into the disconnecting portion 1023. The first binding portion 104 is provided with a plurality of binding pins, which can be bound to a display driver chip. The display driver chip can control the display and touch of the main display panel 101 and the auxiliary display panel 102 .

[0124] 1 to 3 , the display device may further include a cover plate 7 ; the cover plate 7 is disposed on the display surface of the flexible display panel 100 , and the cover plate 7 may protect the display panel.

[0125] Specifically, the cover plate 7 may include a main plate 71 and an edge plate 72; the edge plate 72 is connected to the outer periphery of the main plate 71. The main plate 71 is provided in the main display area ZAA, which is provided on one side of the display surface of the main display panel 101; the main plate 71 is configured as a flat plate. The main plate 71 is configured to have a shape that matches the main display area ZAA. For example, the main display area ZAA can be configured to be circular, and accordingly, the main plate 71 can be configured to be circular; the main display area ZAA can be configured to be elliptical, and accordingly, the main plate 71 can be configured to be elliptical; the main display area ZAA can be configured to be polygonal, and accordingly, the main plate 71 can be configured to be polygonal. The specific dimensions of the main plate 71 can be set as needed.

[0126] The orthographic projection of the main panel 71 on the first reference plane is located within the orthographic projection of the main display panel 101 on the first reference plane. For example, the orthographic projection of the main panel 71 on the first reference plane can coincide with the orthographic projection of the main display panel 101 on the first reference plane, or the edge line of the orthographic projection of the main panel 71 on the first reference plane can be located inside the edge line of the orthographic projection of the main display panel 101 on the first reference plane. In this case, the edge line of the orthographic projection of the display area of ​​the main display panel 101 on the first reference plane can coincide with the orthographic projection of the main panel 71 on the first reference plane. However, some dummy pixels may be set in the edge area of ​​the main display panel 101, and the orthographic projections of these dummy pixels on the first reference plane are located outside the edge line of the orthographic projection of the main panel 71 on the first reference plane. This arrangement ensures that the display surface of the main display panel 101 is located in the main display area ZAA.

[0127] The edge plate 72 is arranged in the secondary display area FAA, and the side of the edge plate 72 close to the flexible display panel 100 is set as a slope, that is, the side of the edge plate 72 close to the flexible display panel 100 is adhered to the display surface of the secondary display panel 102. Since the display surface of the secondary display panel 102 needs to be adhered to the side of the edge plate 72 close to the flexible display panel 100, the side of the edge plate 72 close to the flexible display panel 100 has the same structure as the display surface of the secondary display panel 102, so it will not be repeated here.

[0128] If the thickness of the edge plate 72 is uniform at all locations, the edge plate 72 can be configured in a truncated conical cylindrical shape. The edge plate 72 can be configured in a shape that matches the auxiliary display area FAA. For example, if the auxiliary display area FAA is configured in a conical ring shape, the edge plate 72 can be configured in a truncated conical cylindrical shape accordingly. If the auxiliary display area FAA is configured in an elliptical cone ring shape, the edge plate 72 can be configured in a truncated elliptical cone cylindrical shape accordingly. If the auxiliary display area FAA is configured in a pyramidal ring shape, the edge plate 72 can be configured in a truncated pyramidal cylindrical shape accordingly. The width of the edge plate 72 remains consistent at all locations.

[0129] The angle γ between the side of the edge plate 72 close to the flexible display panel 100 and the side of the main plate 71 close to the flexible display panel 100 is greater than 90 degrees and less than or equal to 179 degrees. For example, the angle γ between the edge plate 72 and the main plate 71 can be 95 degrees, 104 degrees, 108 degrees, 112 degrees, 117 degrees, 120 degrees, 122.5 degrees, 128 degrees, 133 degrees, 137 degrees, 142 degrees, 148 degrees, 150 degrees, 152.5 degrees, 157 degrees, 161 degrees, 165 degrees, 168 degrees, 172 degrees, 176 degrees, and the like.

[0130] On the first reference plane, the distance between the end of the edge plate 72 close to the main plate 71 and the main plate 71 is greater than or equal to 0.017 mm, thereby ensuring that the gap between the edge plate 72 and the main plate 71 is small, avoiding affecting the display effect, and allowing the cover plate 7 to form a certain bending angle.

[0131] The distance H2 between one end of the edge plate 72 away from the main plate 71 and the main plate 71 is greater than or equal to 1 mm and less than or equal to 12 mm. For example, the distance H2 between one end of the edge plate 72 away from the main plate 71 and the main plate 71 can be 1.3 mm, 1.7 mm, 2.1 mm, 2.6 mm, 3 mm, 3.5 mm, 4.1 mm, 4.7 mm, 5.3 mm, 5.7 mm, 6.1 mm, 6.6 mm, 7 mm, 7.5 mm, 8.3 mm, 8.8 mm, 9.1 mm, 9.6 mm, 10 mm, 11.5 mm, 11.8 mm, etc.

[0132] When the display device is set to be circular, the diameter φ of the cover 7 is greater than or equal to 10 mm and less than or equal to 90 mm. For example, the diameter φ of the cover 7 can be 13 mm, 17 mm, 21 mm, 25 mm, 26 mm, 30 mm, 35 mm, 41 mm, 47 mm, 50 mm, 53 mm, 57 mm, 61 mm, 66 mm, 70 mm, 75 mm, 83 mm, 88 mm, etc.

[0133] When the display device is set to a square shape, the length and width of the cover 7 are greater than or equal to 10 mm and less than or equal to 90 mm. For example, the length and width of the cover 7 can be 13 mm, 17 mm, 21 mm, 25 mm, 26 mm, 30 mm, 35 mm, 41 mm, 47 mm, 50 mm, 53 mm, 57 mm, 61 mm, 66 mm, 70 mm, 75 mm, 83 mm, 88 mm, etc.

[0134] It should be noted that the restrictions on the cover plate 7 are all restrictions on the side of the cover plate 7 close to the flexible display panel 100, and there is no restriction on the side of the cover plate 7 away from the flexible display panel 100. The side of the cover plate 7 away from the flexible display panel 100 can be set as needed.

[0135] 3 , in this exemplary embodiment, the cover plate 7 may further include a connecting plate 73 . The connecting plate 73 is connected between the main plate 71 and the edge plate 72 . The Gaussian curvature of the connecting plate 73 is positive.

[0136] An infinite number of lines can be drawn through a point on a surface. Assume that the curvature of these lines is positive (the more convex, the greater the curvature), as shown in Figure 12; zero (the more flat, the curvature), as shown in Figure 13; and negative (the more concave, the less curvature), as shown in Figure 14. The Gaussian curvature of a point on a surface is equal to max{curvature of all lines passing through the point} × min{curvature of all lines passing through the point}. Furthermore, the lines corresponding to the maximum and minimum curvatures (also called principal curvatures) are orthogonal.

[0137] For a flat flexible display panel 100 , a line passing through any point on the flexible display panel 100 is a straight line, so the Gaussian curvature of all points on the flexible display panel 100 is 0×0.

[0138] When we bend the flexible display panel 100 into a cylindrical surface or a conical surface, although the form changes from a plane to a curved surface, there is always a straight line passing through all points on the flexible display panel 100. Therefore, the Gaussian curvature of any point on the cylindrical surface or the conical surface = positive × 0, which is still 0.

[0139] Therefore, it can be concluded that if a surface is bent arbitrarily, its Gaussian curvature will not change as long as it is not stretched, compressed, or torn. Therefore, determining whether a surface is developable is to determine whether its Gaussian curvature is zero. For three-dimensional curved displays with non-zero Gaussian curvature, stretchable / compressible technologies must be applied to achieve feasibility. In other words, to create a three-dimensional curved display with non-zero Gaussian curvature, the flexible display panel 100 must be stretched or compressed.

[0140] Since the connecting plate 73 not only bends along the circumference of the main display panel 101 but also bends from the main display panel 101 to connect to the auxiliary display panel 102, the Gaussian curvature of the connecting plate 73 is positive. The connecting portion 103 is attached to the connecting plate 73, specifically, the connecting portion 103 is bonded to the connecting plate 73. Therefore, the Gaussian curvature of the connecting portion 103 is also positive. As a result, the connecting structure 303 of the planar patterned display screen 300 needs to be stretched or compressed to be attached to the connecting plate 73. Configuring the connecting portion 103 to have the above-mentioned structure with tensile properties allows the connecting portion 103 to be well attached to the connecting plate 73, ensuring the display effect of the display device.

[0141] As shown in Figures 2 and 3, the display device may further include a first shielding portion 81. The first shielding portion 81 is disposed on the side of the cover plate 7 proximate to the flexible display panel 100. The first shielding portion 81 is an ink layer applied to the side of the cover plate 7 proximate to the flexible display panel 100. The first shielding portion 81 is located between the main display area ZAA and the auxiliary display area FAA. Since the connecting plate 73 is also located between the main display area ZAA and the auxiliary display area FAA, the first shielding portion 81 is applied to the side of the connecting plate 73 proximate to the flexible display panel 100. The first shielding portion 81 can block the gap between the connecting portion 103 and the main display area ZAA and the auxiliary display area FAA, preventing other devices or circuits disposed on the side of the flexible display panel 100 facing away from the cover plate 7 from being viewed by the user and affecting the overall display effect of the display device. In addition, some dummy pixels may be disposed in the edge area of ​​the main display panel 101. The first shielding portion 81 can block these dummy pixels, preventing them from being viewed by the user and affecting the overall display effect of the display device.

[0142] The first shielding portion 81 is configured to have a shape that matches the main display area ZAA. For example, the main display area ZAA can be configured to be circular, and correspondingly, the first shielding portion 81 can be configured to be annular. Furthermore, in other exemplary embodiments of the present disclosure, the main display area ZAA can be configured to be elliptical, and correspondingly, the first shielding portion 81 can be configured to be an elliptical ring; the main display area ZAA can be configured to be polygonal, and correspondingly, the first shielding portion 81 can be configured to be a polygonal ring. Of course, the main display area ZAA and the first shielding portion 81 can also be configured to have other shapes, which will not be described here.

[0143] Please continue to refer to Figures 2 and 3. The display device may further include a second shielding portion 82. The second shielding portion 82 is provided on the side of the cover plate 7 close to the flexible display panel 100. The second shielding portion 82 is an ink layer, which is coated on the side of the cover plate 7 close to the flexible display panel 100; and the second shielding portion 82 is located on the side of the secondary display area FAA away from the main display area ZAA. Some dummy pixels may be set in the edge area of ​​the secondary display panel 102. These dummy pixels can be blocked by the first shielding portion 81 to avoid being viewed by the user and affecting the overall display effect of the display device.

[0144] The second blocking portion 82 is set to a shape that is compatible with the secondary display area FAA. For example, the secondary display area FAA can be set to a conical ring shape, and correspondingly, the second blocking portion 82 can be set to a conical ring shape; the secondary display area FAA can be set to an elliptical cone ring shape, and correspondingly, the second blocking portion 82 can be set to an elliptical cone ring shape; the secondary display area FAA can be set to a pyramidal ring shape, and correspondingly, the second blocking portion 82 can be set to a pyramidal ring shape.

[0145] Continuing with reference to FIG. 2 and FIG. 3 , the display device may further include a third shielding portion 83, which is disposed on a side of the cover plate 7 close to the flexible display panel 100. The third shielding portion 83 is an ink layer applied to the side of the cover plate 7 close to the flexible display panel 100. The third shielding portion 83 is connected between the first shielding portion 81 and the second shielding portion 82. The third shielding portion 83 at least covers the disconnected portion 1023, and the orthographic projection of the disconnected portion 1023 on the first reference plane is within the orthographic projection of the third shielding portion 83 on the first reference plane. For example, the orthographic projection of the disconnected portion 1023 on the first reference plane coincides with the orthographic projection of the third shielding portion 83 on the first reference plane, or the orthographic projection of the third shielding portion 83 on the first reference plane covers and is larger than the orthographic projection of the disconnected portion 1023 on the first reference plane. The third shielding portion 83 can shield the disconnecting portion 1023 to prevent the first binding portion 104 and other devices or circuits arranged on the side of the flexible display panel 100 away from the cover plate 7 from being viewed by the user, thereby affecting the overall display effect of the display device.

[0146] Of course, the first shielding portion 81 , the second shielding portion 82 and the third shielding portion 83 may also be made of other light-shielding materials and may be formed on the side of the cover plate 7 close to the flexible display panel 100 by processes such as sputtering and deposition.

[0147] As shown in Figures 15-17 , the main display panel 101 is configured as a rounded rectangle, that is, the main display panel 101 includes four straight edges and four rounded edges, which are arranged alternately and connected end to end to form a circle. The auxiliary display panel 102 includes a first sub-display panel 1024 and a second sub-display panel 1025. The first sub-display panel 1024 is configured as a rectangle and is located on one side of the straight edges; the second sub-display panel 1025 is configured as a partial conical ring and is located on one side of the rounded edges.

[0148] Specifically, four first sub-display panels 1024 may be provided, and one of the first sub-display panels 1024 is provided with a disconnection portion 1023. Therefore, the first sub-display panel 1024 is divided into two parts by the disconnection portion, or the length of the first sub-display panel 1024 is shorter than the lengths of the other first sub-display panels 1024. Four second sub-display panels 1025 may be provided, and the second sub-display panel 1025 is connected between two adjacent first sub-display panels 1024. The four first sub-display panels 1024 and the four second sub-display panels 1025 are alternately provided. The two first sub-display panels 1024 located on opposite sides of the main display panel 101 have the same angle with the first reference plane. The extended surfaces of the two first sub-display panels 1024 located on opposite sides of the main display panel 101 intersect to form a virtual straight line. The extended surfaces of the four first sub-display panels 1024 intersect to form two virtual straight lines. The two virtual straight lines are arranged perpendicularly. Moreover, the two virtual straight lines can intersect in the same plane, so that the four first sub-display panels 1024 have the same angle with the first reference plane. The two virtual straight lines can also be located in different planes, that is, the distances between the two virtual straight lines and the display surface of the display panel are different.

[0149] In addition, referring to Figure 30, Figure 30 is a structural schematic diagram of the flexible display panel in a planar state. Therefore, the main display part 301 forms the main display panel 101, and the sub-display part 302 forms the sub-display panel 102; the connecting part 103 may also not be set between the main display panel 101 and the sub-display panel 102, that is, the main display panel 101 and the sub-display panel 102 are set at an interval. In this case, the flexible display panel may further include a second binding part 106, which is connected to the sub-display panel 102 and is located on the side of the sub-display panel 102 away from the main display panel 101. A plurality of binding pins are also provided on the second binding part 106, which can be bound to the display driver chip to control the display and touch of the sub-display panel 102 through the display driver chip.

[0150] It should be noted that Figure 30 only shows that the connection part 103 may not be set between the main display panel 101 and the auxiliary display panel 102, and a second binding part 106 is provided. This structure is not limited to being used only for rounded rectangular display devices. This structure can also be used for the circular display device shown in Figure 1, and can also be used for other elliptical or various polygonal display devices.

[0151] The flexible display panel 100 can be an OLED (Organic Electroluminescence Display) flexible display panel 100, a QLED (Quantum Dot Light Emitting Diodes) flexible display panel 100, etc.; the flexible display panel 100 has a light-emitting side and a non-light-emitting side, the light-emitting side and the non-light-emitting side are arranged opposite to each other, and an image can be displayed on the light-emitting side, and the side that displays the image is the display surface.

[0152] The following description will be made by taking the OLED flexible display panel 100 as an example.

[0153] As shown in Figure 18, the flexible display panel 100 may include a base layer 1, a display function layer group 2, a first adhesive layer 3 and a protective layer 4; the display function layer group 2 is arranged on one side of the base layer 1; the first adhesive layer 3 is arranged on the side of the display function layer group 2 facing away from the base layer 1; the protective layer 4 is arranged on the side of the first adhesive layer 3 facing away from the base layer 1, and the protective layer 4 and the display function layer group 2 are bonded into one through the first adhesive layer 3.

[0154] The base layer 1 is a flexible base layer that can provide support for each functional layer. The material of the base layer 1 may include an inorganic material, for example, the inorganic material may be glass, quartz or metal. The material of the base layer 1 may also include an organic material, for example, the organic material may be a resin material such as polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate and polyethylene naphthalate. The base layer 1 can be formed by multiple layers of material, for example, the base layer 1 may include multiple substrate layers, and the material of the substrate layer may be any of the above-mentioned materials. Of course, the base layer 1 can also be set as a single layer, which may be any of the above-mentioned materials.

[0155] As shown in Figure 19, the display function layer group 2 may include a driving backplane 21, a light-emitting substrate 22 and an encapsulation layer group 23; the driving backplane 21 is arranged on one side of the base layer 1; the light-emitting substrate 22 is arranged on the side of the driving backplane 21 away from the base layer 1; the encapsulation layer group 23 is arranged on the side of the light-emitting substrate 22 away from the base layer 1.

[0156] As shown in Figure 19, the driving backplane 21 may include a plurality of driving circuits arranged in an array, the light-emitting substrate 22 may include a plurality of light-emitting devices arranged in an array, the driving circuit may drive the light-emitting devices to emit light, the light-emitting substrate 22 is electrically connected to the driving backplane 21, and the driving backplane 21 is used to drive the light-emitting substrate 22 to emit light.

[0157] As shown in Figure 19, a light shielding layer 211 can also be provided on one side of the base layer 1. Light incident from the base layer 1 into the active layer generates photogenerated carriers in the active layer, significantly affecting the characteristics of the thin-film transistors and ultimately the image quality of the display device. The light shielding layer 211 can block light incident from the base layer 1, thereby preventing it from affecting the characteristics of the thin-film transistors and thus the image quality of the display device. Depending on the type of thin-film transistor, the light shielding layer 211 may be omitted.

[0158] A buffer layer 212 may also be formed on the side of the light-shielding layer 211 facing away from the base layer 1. The buffer layer 212 serves to block water vapor and impurity ions in the base layer 1 (especially the organic material) and to increase hydrogen ions for the subsequently formed active layer. The buffer layer 212 is made of an insulating material and can insulate and isolate the light-shielding layer 211 from the active layer. The buffer layer 212 may include silicon nitride, silicon oxide, or silicon oxynitride. Depending on the type of base layer 1 or process conditions, the buffer layer 212 may be omitted.

[0159] An active layer is provided on the side of the buffer layer 212 facing away from the base layer 1 . The active layer may include a channel portion 2131 and conductor portions provided at both ends of the channel portion 2131 . One of the two conductor portions is a source connection portion 2132 , and the other is a drain connection portion 2133 . A gate insulating layer 214 is provided on the side of the active layer facing away from the base layer 1. A gate electrode 215 is provided on the side of the gate insulating layer 214. An interlayer dielectric layer 216 is provided on the side of the gate electrode 215 facing away from the base layer 1. A through hole is provided in the interlayer dielectric layer 216, which is connected to the conductor portion through the hole. A first connecting conductor layer 217 is provided on the side of the interlayer dielectric layer 216 facing away from the base layer 1. The first connecting conductor layer 217 may include a source electrode 2171 and a drain electrode 2172. The source electrode 2171 is connected to the source connecting portion 2132 through the via hole in the interlayer dielectric layer 216, and the drain electrode 2172 is connected to the drain connecting portion 2133 through the via hole in the interlayer dielectric layer 216. A planarizing layer 218 is provided on the side of the first connecting conductor layer 217 facing away from the base layer 1. A through hole is provided in the planarizing layer 218, which is connected to the drain electrode 2172 through the hole. The channel portion 2131 , the gate 215 , the source 2171 , and the drain 2172 form a thin film transistor.

[0160] In other exemplary embodiments of the present disclosure, a passivation layer is provided on the side of the first connecting conductor layer 217 facing away from the base layer 1, and a via is also provided in the passivation layer. A second connecting conductor layer is provided on the side of the passivation layer facing away from the base layer 1. The second connecting conductor layer may include a second source connecting line and / or a second drain connecting line. The second source connecting line and the second drain connecting line are connected to the source 2171 and the drain 2172 respectively through the vias in the passivation layer. Of course, a third connecting conductor layer, a fourth connecting conductor layer, and so on may also be provided as needed.

[0161] It should be noted that the thin film transistors described in this specification are top-gate thin film transistors. In other exemplary embodiments of the present disclosure, the thin film transistors may also be bottom-gate or dual-gate thin film transistors, and their specific structures are not described in detail here. Moreover, when using thin film transistors with opposite polarities or when the current direction changes during circuit operation, the functions of the "source 2171" and "drain 2172" are sometimes interchangeable. Therefore, in this specification, the "source 2171" and "drain 2172" may be interchangeable.

[0162] 19 , a light-emitting substrate 22 is provided on the side of the planarization layer 218 away from the base layer 1 . The light-emitting substrate 22 may include a first electrode 221 , a pixel definition layer 222 , a light-emitting layer group 223 and a second electrode 224 .

[0163] Specifically, a first electrode 221 is provided on the side of the planarization layer 218 facing away from the base layer 1 . The first electrode 221 is connected to the drain electrode 2172 of the driving backplane 21 through a through hole. The first electrode 221 may be an anode (pixel electrode).

[0164] A pixel definition layer 222 is provided on the side of the first electrode 221 facing away from the base layer 1 . An opening is provided on the pixel definition layer 222 , which is connected to the first electrode 221 , so that at least part of the first electrode 221 is not covered by the pixel definition layer 222 .

[0165] A light-emitting layer group 223 is provided on the side of the pixel definition layer 222 facing away from the base layer 1, with at least a portion of the light-emitting layer group 223 located within the opening. A second electrode 224 is provided on the side of the light-emitting layer group 223 facing away from the base layer 1. The second electrode 224 can be a cathode (common electrode). The light-emitting layer group 223 within an opening emits light to form a sub-pixel, such that the orthographic projection of the sub-pixel on the base layer 1 is the orthographic projection of the light-emitting layer group 223 within the opening on the base layer 1. The flexible display panel 100 can include multiple sub-pixels.

[0166] The light-emitting layer group 223 may include a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer stacked in sequence. The hole injection layer is in contact with the first electrode 221, and the electron injection layer is in contact with the second electrode 224. Of course, in other exemplary embodiments of the present disclosure, the light-emitting layer group 223 may include only the hole transport layer, the light-emitting layer, and the electron transport layer. The light-emitting layer group 223 may also have other structures, and its specific structure can be set as needed.

[0167] Holes are injected into the organic light-emitting layer from the first electrode 221 side, and electrons are injected into the organic light-emitting layer from the second electrode 224 side. Eventually, the holes and electrons recombine in the organic light-emitting layer to generate excitons. When the generated excitons relax from the excited state to the ground state, the OLED emits visible light.

[0168] An encapsulation layer group 23 is provided on the side of the second electrode 224 facing away from the substrate layer 1. As shown in FIG19 , the encapsulation layer group 23 can be provided as a multilayer structure. The encapsulation layer group 23 can include an organic layer 232 and an inorganic layer. Specifically, the encapsulation layer group 23 can include a first inorganic layer 231, an organic layer 232 provided on the side of the first inorganic layer 231 facing away from the substrate layer 1, and a second inorganic layer 233 provided on the side of the organic layer 232 facing away from the substrate layer 1. The materials of the first inorganic layer 231, the organic layer 232, and the second inorganic layer 233 are not further described herein. Of course, the encapsulation layer group 23 can also include more or fewer layers.

[0169] 19 , the display function layer group 2 may further include a touch layer group 24 and a polarizer 25 .

[0170] In this exemplary embodiment, as shown in FIG19 , a touch layer group 24 is disposed on the side of the encapsulation layer group 23 facing away from the base layer 1. The touch layer group 24 may include a first touch layer 241, a touch insulating layer 242, a second touch layer 243, and a protective cover layer 244. The first touch layer 241 is disposed on the side of the encapsulation layer group 23 facing away from the base layer 1. The first touch layer 241 may have a three-layer structure of Ti / Al / Ti, ITO / Ag / ITO, or the like. The touch insulating layer 242 is disposed on the side of the first touch layer 241 facing away from the base layer 1. The material of the touch insulating layer 242 may be SiNx. The second touch layer 243 is disposed on the side of the touch insulating layer 242 facing away from the base layer 1. The second touch layer 243 may have a three-layer structure of Ti / Al / Ti, ITO / Ag / ITO, or the like. A protective cover layer 244 is disposed on the side of the second touch layer 243 facing away from the base layer 1. The material of the protective cover layer 244 is PI (polyimide). The first touch layer 241 and the second touch layer 243 can be connected to the driver backplane 21 through the vias in the encapsulation layer group 23 and the barrier layer, and then connected to the first binding portion 104 through the driver backplane 21. Of course, the materials and structures of the above-mentioned film layers are only examples and can be selected and configured as needed.

[0171] A polarizer 25 may be provided on the side of the touch layer assembly 24 facing away from the base layer 1. A first adhesive layer 3 may be provided on the side of the polarizer 25 facing away from the base layer 1. A protective layer 4 may be adhered to the side of the first adhesive layer 3 facing away from the base layer 1. A cover plate 7 may be adhered to the side of the protective layer 4 facing away from the base layer 1. The protective layer 4 protects the display function layer assembly 2, preventing friction between the display surface of the display function layer assembly 2 and the cover plate 7, which could affect the display of the display function layer assembly 2.

[0172] In some other example embodiments of the present disclosure, the display function layer group 2 may not include the touch layer group 24 and the polarizer 25. Referring to Figure 20, a second adhesive layer 5 is provided on the side of the display function layer group 2 facing away from the base layer 1, and a touch function layer 6 is adhered to the side of the second adhesive layer 5 facing away from the base layer 1. The specific structure of the touch function layer 6 may be the same as the specific structure of the touch layer group 24, so it will not be repeated here. It is just that the touch function layer 6 needs to extend to the first binding portion 104 for binding; that is, the touch function layer 6 is an external structure. The polarizer 25 can also be adhered to the side of the touch function layer 6 facing away from the base layer 1, and the first adhesive layer 3 is provided on the side of the polarizer 25 facing away from the base layer 1. The protective layer 4 can be adhered to the side of the first adhesive layer 3 facing away from the base layer 1, and the cover plate 7 can be adhered to the side of the protective layer 4 facing away from the base layer 1.

[0173] 18 and 20 , a back functional layer 9 may be provided on the side of the base layer 1 away from the display functional layer group 2. The back functional layer 9 may include a buffer material layer, a heat dissipation layer, and the like.

[0174] 21 , no flexible display panel film layer is provided in the second gap 105 between the main display panel 101 and the auxiliary display panel 102 .

[0175] 22 , the connection portion 103 connected between the main display panel 101 and the auxiliary display panel 102 may not be provided with the back functional layer 9 , thereby reducing the strength of the connection portion 103 and making the connection portion 103 more flexible, which is conducive to bending the connection portion 103 .

[0176] In addition, since the electrical connection between the main display panel 101 and the auxiliary display panel 102 is achieved through the connecting part 103, only the driving backplane 21 can be set on the connecting part 103, and the electrical connection between the main display panel 101 and the auxiliary display panel 102 can be achieved through the wiring on the driving backplane 21, and other film layers may not be set.

[0177] Based on the same inventive concept, an exemplary embodiment of the present disclosure provides a method for manufacturing a display device, as shown in FIG. 23 , the method may include the following steps:

[0178] Step S10: providing a flexible display screen and a carrier film, and attaching the flexible display screen to the carrier film.

[0179] Step S20 , cutting the flexible display screen and the carrier film to form a patterned display screen and a patterned carrier film, wherein the patterned display screen includes a main display portion and a sub-display portion, and both the main display portion and the sub-display portion are flat.

[0180] Step S30, the patterned display screen and the patterned carrier film are contoured so that the main display portion is located in the main display area to form a main display panel, the sub-display portion is located in the sub-display area to form a sub-display panel, and the display surface of the sub-display panel is formed as a slope; at least a portion of the sub-display area is surrounded by the periphery of the main display area, and the main display area and the sub-display area are spaced apart.

[0181] Among them, the extended surface of the display surface of the auxiliary display panel 102 intersects on the side of the main display panel 101 away from the auxiliary display panel 102 to form a virtual vertex or a virtual straight line, and the ratio of the distance between the virtual vertex or the virtual straight line and the display surface of the main display panel 101 to the distance between the center point of the main display panel 101 and the boundary line is greater than or equal to 0.2 and less than or equal to 12.

[0182] The following is an example of a method for preparing a display device.

[0183] In this exemplary embodiment, a flexible display screen 200 is prepared and formed. The shape of the flexible display screen 200 matches the shape of the display device. For example, if the display device is circular, the flexible display screen 200 is configured as a circular shape; if the display device is elliptical, the flexible display screen 200 is configured as an elliptical shape; and if the display device is rectangular, the flexible display screen 200 is configured as a rectangular shape. Of course, the display device and the flexible display screen 200 can also have other shapes, which are not detailed here.

[0184] The flexible display screen 200 may not be provided with a driving circuit and a light-emitting device in the position that needs to be cut and removed later. The driving circuit and the light-emitting device may be provided only in the area forming the main display panel 101 and the auxiliary display panel 102, and the connectivity is ensured; thereby avoiding discontinuity between the driving circuits after subsequent cutting and removal, which may cause some light-emitting devices to fail to emit light normally.

[0185] The carrier film 400 is a flexible film made of a resin material such as polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate, or polyethylene naphthalate. The carrier film 400 can be rectangular. The perimeter of the carrier film 400 protrudes beyond the flexible display 200, allowing the clamp to grip around the perimeter of the carrier film 400.

[0186] 24 , the non-display surface of the flexible display screen 200 is attached to the carrier film 400 .

[0187] In this exemplary embodiment, adhesive is coated on the display surface of the flexible display screen 200 . The adhesive may be made of OCA optical adhesive, or other transparent adhesive layers.

[0188] Then, as shown in FIG25 , the flexible display 200 and the carrier film 400 are simultaneously cut, which may be performed by laser cutting. The flexible display 200 is laser cut to form a patterned display 300, which includes a main display portion 301 and a secondary display portion 302, both of which are planar. The carrier film 400 is laser cut to form a patterned carrier film 500.

[0189] Since the main display portion 301 does not need to be deformed to form the main display panel 101, the structure of the main display portion 301 is the same as that of the main display panel 101, that is, the main display portion 301 and the main display panel 101 not only have the same shape but also have exactly the same size; for example, the main display panel 101 can be set to a circle, and correspondingly, the main display portion 301 can be set to a circle; the main display panel 101 can be set to an elliptical shape, and correspondingly, the main display portion 301 can be set to an elliptical shape; the main display panel 101 can be set to a polygon, and correspondingly, the main display portion 301 can be set to a polygon.

[0190] The sub-display portion 302 is provided in a ring shape and surrounds a portion of the outer circumference of the main display portion 301 .

[0191] The ring width of the secondary display unit 302 remains consistent across the entire display unit. Ring width refers to the radial width of the ring. If the secondary display unit 302 is annular, the ring width is calculated by subtracting the radius of the inner circle from the outer radius. A ring is equivalent to a hollow circle, with a small radius (r) and a large radius (R). The ring width is the radius of the hollow circle minus the radius of the inner circle.

[0192] Specifically, the secondary display unit 302 may include a first portion 3021 and a second portion 3022 connected to each other. The first portion 3021 and the second portion 3022 are both configured as rings with the same radius. For example, two second portions 3022 are provided and symmetrically connected to opposite sides of the first portion 3021. That is, the second portion 3022, the first portion 3021, and the second portion 3022 are sequentially connected to form the secondary display unit 302. This configuration facilitates the design and calculation of the secondary display unit 302. Furthermore, when the secondary display unit 302 is bent to form the secondary display panel 102, bending stress can be reduced, thereby preventing warping of the secondary display panel 102 and ensuring a good display effect. Of course, in other exemplary embodiments of the present disclosure, a single second portion 3022 may be provided, connected to one side of the first portion 3021.

[0193] The secondary display portion 302 is connected to the main display portion 301 as a whole. Specifically, the patterned display screen 300 may further include a connecting structure 303. The connecting structure 303 is connected between the first portion 3021 and the main display portion 301. The second portion 3022 is spaced apart from the main display portion 301, so that a first gap 304 is provided between the second portion 3022 and the main display portion 301. The connecting structure 303 is shaped to form the connecting portion 103. After the shaped connection, the first gap 304 forms the second gap 105.

[0194] The radial width of the first gap 304 increases as the distance from the connection structure 303 increases, that is, the farther away from the connection structure 303 , the wider the radial width of the first gap 304 .

[0195] As shown in Figures 8-11 , the connection structure 303 is provided with a plurality of vias 1031. The shapes of the vias 1031 can be rectangular, oval, round, cross-shaped, etc. The connection structure 303 provided with a plurality of vias 1031 has a certain degree of stretchability, enabling better fit with the connection plate 73 of the cover plate 7. The number of vias 1031 can be set as needed.

[0196] As shown in Figures 5, 6, and 25, the connection structure 303 may include at least two connection bars 1032. One end of each connection bar 1032 is connected to the main display portion 301, and the opposite end of each connection bar 1032 is connected to the first portion 3021. The number of connection bars 1032 can be adjusted as needed. As shown in Figures 5 and 25, the connection bars 1032 can be configured as straight bars. Similarly, this configuration of the connection structure 303 exhibits a certain degree of stretchability, enabling better coordination with the connection plate 73 of the cover plate 7.

[0197] 6 and 7 , the connecting strip 1032 is configured as a curved shape. Specifically, the connecting strip 1032 can be configured as a rectangular curved shape, i.e., a plurality of rectangular notches are spaced apart on opposite sides of the straight strip. The connecting strip 1032 can also be configured as an arcuate curved shape, i.e., the connecting strip 1032 can include one, two, or more arcuate strips, with two adjacent arcuate strips smoothly connected. The curved connecting strip 1032 can also be a structure in which a rectangular curved strip is connected to an arcuate curved strip. The curved connecting strip 1032 can also have other shapes, which are not described here in detail. Similarly, the connecting structure 303 configured in this way has a certain degree of stretchability. It can better cooperate with the connecting plate 73 of the cover plate 7.

[0198] In this exemplary embodiment, as shown in FIG. 25 , the secondary display portion 302 has a disconnection structure 3023. Specifically, the disconnection structure 3023 is disposed between the two second portions 3022. That is, the disconnection structure 3023 disconnects the secondary display portion 302 to form the two second portions 3022. The disconnection structure 3023 and the connection structure 303 are disposed on opposite sides of the main display portion 301, further ensuring that the two second portions 3022 are symmetrically disposed, ensuring balanced stress on the secondary display portion 302, and thus maintaining excellent display and touch performance.

[0199] In this example embodiment, as shown in FIG. 25 , patterned display screen 300 may further include a first binding structure 305. The first binding structure 305 is connected to the main display portion 301. The first binding structure 305 and the connecting structure 303 are disposed on opposite sides of the main display portion 301. Specifically, the first binding structure 305 is connected to a side of the main display portion 301 facing away from the connecting structure 303, and a portion of the first binding structure 305 extends into the disconnected portion 1023. The first binding structure 305 is provided with a plurality of binding pins that can be bound to a display driver chip, which can control the display and touch of the main display portion 301 and the auxiliary display portion 302.

[0200] As shown in Figure 25, the patterned carrying film 500 may include a main carrying part (blocked by the main display part 301, not shown in the figure), a first carrying part 501, a second carrying part 502 and a third carrying part 503; the main carrying part is used to carry the main display part 301; the shape and size of the main carrying part are the same as the shape and size of the main display part 301.

[0201] The first bearing portion 501 is connected to the main bearing portion and is used to bear the connection structure and the first part. The first bearing portion 501 protrudes from the first part, and the protruding first bearing portion 501 is clamped by a clamp.

[0202] Two second supporting parts 502 are provided and are located on opposite sides of the main supporting part. The second supporting parts 502 are used to support the second parts. The two second supporting parts 502 are symmetrically arranged to ensure uniform profiling of the second parts on both sides. The second supporting parts 502 are spaced apart from the main supporting part, that is, there is no connection between the second supporting parts 502 and the main supporting part, which facilitates profiling of the second part to form the auxiliary display panel 102. The second supporting parts 502 protrude from the second part, and the protruding second supporting parts 502 are clamped by a clamp.

[0203] The third supporting portion 503 is connected to the main supporting portion and is used to support the first binding structure. The third supporting portion 503 protrudes from the first binding structure, and the protruding third supporting portion 503 is clamped by a clamp.

[0204] Moreover, the first bearing portion 501, the second bearing portion 502 and the third bearing portion 503 are spaced apart, that is, the first bearing portion 501 is spaced apart from the second bearing portion 502, and the second bearing portion 502 is spaced apart from the third bearing portion 503. This facilitates profiling of each portion.

[0205] Furthermore, since the auxiliary display portion 302 needs to be bent and deformed to form the auxiliary display panel 102 , it is necessary to calculate and determine the parameters of the auxiliary display portion 302 .

[0206] Various parameters of the patterned display screen 300 in the planar state are determined according to the parameters of the flexible display panel 100 in the three-dimensional state.

[0207] The following description will be made by taking the main display portion 301 as a circle and the auxiliary display portion 302 as a fan-shaped ring as an example. Referring to FIG. 26 to FIG. 28 , the calculation formulas for determining various parameters of the patterned display screen 300 based on the flexible display panel 100 include:

[0208] r3=r1+r0*Sinθ+W1*cosθ;

[0209] R = r3 / cosθ;

[0210] L0=r0*θ;

[0211] D=RW-L0-r1;

[0212] 360°-β=L out / R.

[0213] Where r2 is the radius of the edge of the auxiliary display panel 102 close to the main display panel 101 in the 3D state; r3 is the radius of the edge of the auxiliary display panel 102 away from the main display panel 101 in the 3D state; r0 is the radius of curvature of the connecting portion 103 in the 3D state; θ is the tilt angle of the auxiliary display panel 102 in the 3D state, that is, θ is the angle between the auxiliary display panel 102 and the first reference plane in the 3D state, and the first reference plane is parallel to the display surface of the main display panel 101; α is the central angle corresponding to the disconnection portion 1023 in the 3D state. These parameters in the 3D state are all known parameters.

[0214] R is the radius of the edge of the secondary display portion 302 away from the main display portion 301 in the planar state, β is the central angle corresponding to the disconnection structure 3023 in the planar state, D is the distance between the center of the secondary display portion 302 and the center of the main display portion 301 in the planar state, and L0 is the radial width of the connection structure 303 in the planar state. These planar state parameters are all unresolved parameters.

[0215] r1 is the radius of the main display panel 101, W is the width of the auxiliary display panel 102 in the radial direction, L out L is the length of the edge of the auxiliary display panel 102 away from the main display panel 101, in is the length of the edge of the auxiliary display panel 102 close to the main display panel 101. These parameters do not change when the flexible display panel 100 is shaped from a planar state to a three-dimensional state. Therefore, these parameters are the same in the three-dimensional state and in the planar state, and these parameters are all known parameters.

[0216] Therefore, the parameters R, D, β, and L0 can be calculated using the following formula.

[0217] L0=r0*θ;

[0218] D=RW-L0-r1.

[0219] Of course, other formulas including parameters to be determined may also be selected from the above formulas for calculation.

[0220] As shown in Table 1, five embodiments are listed, and the unknown parameters of the planar state are calculated by using some known parameters of the three-dimensional state and some known invariant parameters.

[0221] Table 1

[0222] 25 and 26 , in the case where the main display portion 301 is configured as a rounded rectangle, the auxiliary display portion 302 may include a first sub-display portion 3023 and a second sub-display portion 3024; the first sub-display portion 3023 is configured as a rectangle; the second sub-display portion 3024 is configured as a fan-shaped ring, and the central angle corresponding to the second sub-display portion 3024 is greater than 0° and less than 90°. For example, the central angle corresponding to the second sub-display portion 3024 may be 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 83°, 88°, etc. The angle is related to the angle between the second sub-display panel 1025 and the first reference plane. Generally, the larger the angle between the second sub-display panel 1025 and the first reference plane, the smaller the central angle corresponding to the second sub-display portion 3024. Conversely, the smaller the angle between the second sub-display panel 1025 and the first reference plane, the larger the central angle corresponding to the second sub-display portion 3024.

[0223] It should be noted that although the steps of the method for manufacturing a display device in the present disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in this specific order, or that all steps must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or a step may be broken down into multiple steps.

[0224] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A display device, wherein: It has a main display area and a secondary display area at least partially surrounded by the main display area, and the main display area and the secondary display area are spaced apart; The display device comprises: A flexible display panel, comprising: A main display panel, arranged in the main display area; A secondary display panel is arranged in the secondary display area, the display surface of the secondary display panel is set as an inclined surface, and the extended surface of the display surface of the secondary display panel intersects on the side of the main display panel away from the secondary display panel to form a virtual vertex or a virtual straight line, and the ratio of the distance between the virtual vertex or the virtual straight line and the display surface of the main display panel to the distance between the center point of the main display panel and the boundary line is greater than or equal to 0.2 and less than or equal to 12.

2. The display device according to claim 1, wherein: The auxiliary display panel includes a first display portion and a second display portion connected to each other, and the flexible display panel further includes: The connecting portion is connected between the first display portion and the main display panel, and the second display portion is spaced apart from the main display panel.

3. The display device according to claim 2, wherein: A plurality of via holes are provided on the connecting portion, or the connecting portion includes: At least two connection bars, one end of each connection bar is connected to the main display panel, and the other end of each connection bar is connected to the first display portion.

4. The display device according to claim 3, wherein: The connecting strip is arranged in a curved shape.

5. The display device according to claim 3, wherein: The plurality of via holes are arranged along an arc and at equal rotation angles.

6. The display device according to claim 2, wherein: The auxiliary display panel has a disconnection portion, and the disconnection portion and the connection portion are arranged on two opposite sides of the main display panel.

7. The display device according to claim 6, wherein: The flexible display panel further includes: The first binding portion is connected to the main display panel and extends to the disconnecting portion. A plurality of binding pins are arranged on the first binding portion.

8. The display device according to claim 6, wherein: The display device further includes: A cover plate is provided on the display surface of the flexible display panel, and the cover plate comprises: A main panel, arranged in the main display area; The edge plate is arranged in the auxiliary display area, the edge plate is connected to the outer periphery of the main plate, and a side of the edge plate close to the flexible display panel is in contact with the display surface of the auxiliary display panel.

9. The display device according to claim 8, wherein: An angle between a surface of the edge plate close to the flexible display panel and a surface of the main plate close to the flexible display panel is greater than 90 degrees and less than or equal to 179 degrees.

10. The display device according to claim 8, wherein: On the first reference plane, the distance between one end of the edge plate close to the main plate and the main plate is greater than or equal to 0.017 mm, and the first reference plane is parallel to the display surface of the main display panel.

11. The display device according to claim 8, wherein: The cover plate also includes: A connecting plate is connected between the main plate and the edge plate, the Gaussian curvature of the connecting plate is positive, and the connecting portion is attached to the connecting plate.

12. The display device according to claim 8, wherein: The display device further includes: The first shielding portion is arranged on a side of the cover plate close to the flexible display panel, and the first shielding portion is located between the main display area and the auxiliary display area.

13. The display device according to claim 12, wherein: The display device further includes: The second shielding portion is disposed on a side of the cover plate close to the flexible display panel and is located on a side of the auxiliary display area away from the main display area.

14. The display device according to claim 13, wherein: The display device further includes: The third shielding portion is disposed on a side of the cover plate close to the flexible display panel and connected between the first shielding portion and the second shielding portion, and the third shielding portion at least covers the disconnection portion.

15. The display device according to claim 14, wherein: The first shielding portion is an ink layer, the second shielding portion is an ink layer, and the third shielding portion is an ink layer.

16. The display device according to claim 1, wherein: The length and width of the cross section of the display surface of the auxiliary display panel on the first reference plane increase with increasing distance from the main display panel in a second direction, the first reference plane is parallel to the display surface of the main display panel, and the second direction is perpendicular to the first reference plane.

17. The display device according to claim 16, wherein: The display surface of the auxiliary display panel is a truncated cone surface or a truncated pyramid surface.

18. The display device according to claim 17, wherein: The orthographic projection of the virtual vertex of the truncated cone surface or the truncated pyramid surface on the main display panel coincides with the center point of the main display panel.

19. The display device according to claim 16, wherein: The main display panel is configured as a rounded rectangle, and the auxiliary display panel comprises: The first sub-display panel is configured as a rectangle; The second sub-display panel is configured in a partial conical ring shape.

20. The display device according to claim 19, wherein: The number of the first sub-display panels is four, the number of the second sub-display panels is four, and the second sub-display panels are connected between two adjacent first sub-display panels; the two first sub-display panels located on opposite sides of the main display panel have the same angle with the first reference plane, the extended surfaces of the two first sub-display panels located on opposite sides of the main display panel intersect to form a virtual straight line, and the extended surfaces of the four first sub-display panels intersect to form two virtual straight lines, and the two virtual straight lines are vertically arranged.

21. A method for preparing a display device, wherein: include: Providing a flexible display screen and a carrier film, and attaching the flexible display screen to the carrier film; Cutting the flexible display screen and the carrier film to form a patterned display screen and a patterned carrier film, wherein the patterned display screen comprises a main display portion and a sub-display portion, and both the main display portion and the sub-display portion are in a flat plate shape; The patterned display screen and the patterned carrier film are contoured so that the main display portion is located in the main display area to form a main display panel, the auxiliary display portion is located in the auxiliary display area to form an auxiliary display panel, and the display surface of the auxiliary display panel is formed as an inclined surface; at least part of the auxiliary display area is surrounded by the periphery of the main display area, and the main display area and the auxiliary display area are spaced apart; Among them, the extended surface of the display surface of the auxiliary display panel intersects on the side of the main display panel away from the auxiliary display panel to form a virtual vertex or a virtual straight line, and the ratio of the distance between the virtual vertex or the virtual straight line and the display surface of the main display panel to the distance between the center point of the main display panel to the boundary line is greater than or equal to 0.2 and less than or equal to 12.

22. The method for manufacturing a display device according to claim 21, wherein: The auxiliary display portion includes a first part and a second part connected to each other, and the patterned display screen further includes: A connecting structure is connected between the first part and the main display part, a first gap is provided between the second part and the main display part, and the connecting structure is contoured to form a connecting part.

23. The method for manufacturing a display device according to claim 22, wherein: The width of the first gap in the radial direction increases as the distance from the connecting structure increases.

24. The method for manufacturing a display device according to claim 22, wherein: The auxiliary display portion has a disconnection structure, and the disconnection structure and the connection structure are arranged on opposite sides of the main display portion.

25. The method for manufacturing a display device according to claim 24, wherein: The patterned display screen further comprises: The first binding structure is connected to the main display panel and extends into the disconnection structure. A plurality of binding pins are arranged on the first binding structure, and the first binding structure is shaped to form a first binding portion.

26. The method for manufacturing a display device according to claim 25, wherein: The patterned carrier film comprises: A main bearing part, used for bearing the main display part; A first bearing portion, connected to the main bearing portion, and used for bearing the connecting structure and the first part; Two second bearing parts are provided and are arranged on two opposite sides of the main bearing part, the second bearing parts are arranged at intervals from the main bearing part, and the second bearing parts are used to carry the second part; A third bearing portion, connected to the main bearing portion, and used to bear the first binding structure; Wherein, the first bearing portion, the second bearing portion and the third bearing portion are arranged at intervals.

27. The method for manufacturing a display device according to claim 25, wherein: The main display part is configured as a circle, and the auxiliary display part is configured as a fan-shaped ring; Before cutting the flexible display screen and the carrier film, the preparation method further includes: The parameters of the patterned display screen are calculated by a calculation formula, wherein the calculation formula includes: L0=r0*θ; D = RW-L0-r1; r3=r1+r0*Sinθ+W1*cosθ; R = r3 / cosθ; Wherein, R is the radius of the edge line of the secondary display portion away from the main display portion in a planar state, β is the central angle of the disconnection structure in a planar state, D is the distance between the center of the secondary display portion and the center of the main display portion in a planar state, and L0 is the radial width of the connection structure in a planar state; L out L is the length of the edge line of the auxiliary display panel away from the main display panel; in is the length of the edge line of the auxiliary display panel close to the main display panel; r0 is the curvature radius of the connecting portion in the three-dimensional state; r1 is the radius of the main display panel, W is the radial width of the auxiliary display panel; θ is the angle between the auxiliary display panel and the first reference plane in the three-dimensional state.

28. The method for manufacturing a display device according to claim 21, wherein: The main display portion is configured as a rounded rectangle, and the auxiliary display portion comprises: The first sub-display portion is configured as a rectangle; The second sub-display portion is arranged in a fan-shaped shape, and a central angle corresponding to the second sub-display portion is greater than 0° and less than 90°.

29. The method for manufacturing a display device according to claim 21, wherein: The preparation method further comprises: A cover plate is provided, and the cover plate is attached to the display surface of the patterned display screen after profiling.

Images