Display module and manufacturing method therefor, and display device

Abstract

A display module, comprising a display panel, a polarizer, a connecting layer, and a cover plate. The display panel comprises a main body region and a binding bending region located on one side of the main body region, the main body region comprises a display region, and the display region comprises a plurality of sub-pixels. The polarizer is provided on a display side of the display panel. The orthographic projection of the polarizer on the display panel is located in the main body region of the display panel. The polarizer comprises a first boundary and a second boundary, the second boundary is located between the first boundary and the binding bending region, and the joint of the first boundary and the second boundary is a circular arc chamfer. The connecting layer is provided on the side of the polarizer away from the display panel. The orthographic projection of the connecting layer on the display panel is located in the main body region of the display panel and covers the orthographic projection of the polarizer on the display panel. The cover plate is provided on the side of the connecting layer away from the polarizer, and the cover plate is attached to a curved surface of the connecting layer.

Description

Display module, preparation method thereof and display device

[0001] This application claims priority to Chinese Patent Application No. 202410876867.7, filed on July 1, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of display, and in particular to a display module, a preparation method thereof, and a display device. BACKGROUND

[0003] With the continuous development of wearable display products, end customers have increasingly strong demand for spherical display wearable display products, and wearable display products are gradually developing towards narrow frame and spherical display.

[0004] In the production process of wearable display products, the display panel performing picture display needs to be attached with a spherical cover plate, but curved or full-curved attachment is prone to cause excessive stress of the display module, resulting in light and shadow disorder on the front of the display module, which affects product quality. SUMMARY

[0005] In a first aspect, a display module is provided. The display module includes a display panel, a polarizer, a connecting layer, and a cover plate. The display panel includes a main body area and a binding bending area located on one side of the main body area, and the main body area includes a display area, and the display area includes a plurality of sub-pixels. The polarizer is arranged on the display side of the display panel, and the orthographic projection of the polarizer on the display panel is located within the main body area of the display panel; the polarizer includes a first boundary and a second boundary, the second boundary is located between the first boundary and the binding bending area, and the connection between the first boundary and the second boundary is a circular arc chamfer. The connecting layer is arranged on the side of the polarizer away from the display panel, the orthographic projection of the connecting layer on the display panel is located within the main body area of the display panel, and covers the orthographic projection of the polarizer on the display panel. The cover plate is arranged on the side of the connecting layer away from the polarizer, and the cover plate is curvedly attached with the connecting layer.

[0006] In some embodiments, the orthographic projection of the connecting layer on the display panel coincides with the orthographic projection of the polarizer on the display panel.

[0007] In some embodiments, the distance from the boundary of the orthographic projection of the polarizer on the display panel to the boundary of the display panel is at least 0.05 mm.

[0008] In some embodiments, the first boundary of the polarizer is a circular arc, the second boundary is a straight line, the radius of the circular arc at the circular arc chamfer of the connection between the first boundary and the second boundary of the polarizer is greater than or equal to 1 mm, and less than or equal to the radius of the circular arc where the first boundary is located.

[0009] In some embodiments, the binding bending area of the display panel includes a bending area. The display module further includes a back film layer. The back film layer is arranged on a side of the display panel away from the polarizer; the back film layer is provided with a groove away from the surface of the display panel, the groove is arranged corresponding to the bending area of the display panel, the groove includes a first side and a second side, the first side is closer to the main area of the display panel than the second side, and the first side is a circular arc surface protruding towards the second side.

[0010] In some embodiments, the back film layer includes a first part located on a side of the first side of the groove; the first part of the back film layer includes a first boundary and a second boundary, the first side of the groove is the second boundary of the first part of the back film layer, the first boundary of the first part of the back film layer is a circular arc, and the connection between the first boundary and the second boundary of the first part of the back film layer is a circular arc chamfer.

[0011] In some embodiments, the groove penetrates the back film layer in the thickness direction of the back film layer.

[0012] In some embodiments, the binding bending area of the display panel further includes a binding area located on a side of the bending area away from the display area. The display panel includes a plurality of connection leads, the plurality of connection leads are arranged in the bending area, and the first end of the plurality of connection leads extends to the main area and is electrically connected to the plurality of sub-pixels, and the second end of the plurality of connection leads extends to the binding area.

[0013] In some embodiments, the connection of the first end of the plurality of connection leads constitutes a connection starting line; the distance between the orthographic projection of the first side of the groove of the back film layer on the display panel and the connection starting line is 50-150 um.

[0014] In some embodiments, the connection starting line is a circular arc line protruding towards the bending area.

[0015] In some embodiments, the orthographic projection of the first side of the groove of the back film layer on the display panel is parallel to the connection starting line.

[0016] In some embodiments, the boundary of the display panel located in the main area is a circular arc, and the radius of the circular arc where the connection starting line is located is greater than the radius of the circular arc where the boundary of the display panel located in the main area is located.

[0017] In a second aspect, a preparation method of a display module is provided. The preparation method of the display module comprises: providing a polarizer, the polarizer comprising a first boundary and a second boundary, and a connecting portion between the first boundary and the second boundary being a circular arc chamfer; disposing a connecting layer on one side of the polarizer, the connecting layer covering the polarizer; forming an initial display panel on a side of the polarizer away from the connecting layer, the initial display panel comprising a preset main body area and a preset binding bending area located on one side of the preset main body area, the preset main body area of the initial display panel comprising a display area, the display area comprising a plurality of sub-pixels; the polarizer and the connecting layer being located on a display side of the initial display panel, and the polarizer and the connecting layer being located in the preset main body area of the initial display panel; the second boundary of the polarizer being located between the first boundary and the preset binding bending area; and cutting the initial display panel to form a display panel; the preset main body area of the initial display panel being a main body area of the display panel, and the preset binding bending area of the initial display panel being a binding bending area of the display panel; forming a cover plate, the cover plate being disposed on a side of the connecting layer away from the polarizer, and the cover plate being curvedly attached to the connecting layer.

[0018] In some embodiments, the connecting layer is integrally cut with the polarizer, and the connecting layer completely overlaps the polarizer.

[0019] In a third aspect, a display module is also provided. The display module comprises a display panel, a polarizer, a connecting layer, a cover plate, and a back film layer. The display panel comprises a main body area and a binding bending area located on one side of the main body area, the main body area comprising a display area, the display area comprising a plurality of sub-pixels, and the binding bending area comprising a bending area. The polarizer is disposed on a display side of the display panel, and a normal projection of the polarizer on the display panel is located in the main body area of the display panel. The connecting layer is disposed on a side of the polarizer away from the display panel, a normal projection of the connecting layer on the display panel is located in the main body area of the display panel, and the normal projection of the connecting layer on the display panel overlaps the normal projection of the polarizer on the display panel. The cover plate is disposed on a side of the connecting layer away from the polarizer, and the cover plate is curvedly attached to the connecting layer. The back film layer is disposed on a side of the display panel away from the polarizer, a surface of the back film layer away from the display panel is provided with a groove, the groove is correspondingly disposed on the bending area of the display panel, the groove comprises a first side and a second side, the first side is closer to the main body area of the display panel than the second side, and the first side is a circular arc surface protruding toward the second side.

[0020] In a fourth aspect, a display device is provided. The display device comprises a display module and a circuit board. The display module is the display module provided in any of the above embodiments. The circuit board is connected with the display module. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly introduced as follows. Obviously, the drawings in the following description are only some drawings of the embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size, actual process, actual time sequence, etc. of the product involved in the embodiments of the present disclosure.

[0022] FIG. 1 is a structural diagram of a display device according to an embodiment of the present disclosure;

[0023] FIG. 2 is a sectional view taken along the section line A-A in FIG. 1;

[0024] FIG. 3 is a step diagram of a manufacturing method of a display module according to an embodiment of the present disclosure;

[0025] FIG. 4 is a sectional view of a display device according to an embodiment of the present disclosure;

[0026] FIG. 5 is a sectional view of another display device according to an embodiment of the present disclosure;

[0027] FIG. 6 is a plan view of a stack of display modules according to an embodiment of the present disclosure;

[0028] FIG. 7 is a plan view of a stress distribution according to an embodiment of the present disclosure;

[0029] FIG. 8 is an expanded plan view of a display device according to an embodiment of the present disclosure;

[0030] FIG. 9A is a plan view of a display module according to an embodiment of the present disclosure;

[0031] FIG. 9B is a sectional view taken along the section line B-B in FIG. 9A;

[0032] FIG. 10 is a plan view of a polarizing sheet according to an embodiment of the present disclosure;

[0033] FIG. 11 is a plan view of a display panel according to an embodiment of the present disclosure;

[0034] FIG. 12 is a plan view of another display panel according to an embodiment of the present disclosure;

[0035] FIG. 13 is a sectional view of a display panel according to an embodiment of the present disclosure;

[0036] FIG. 14 is a sectional view of a cover plate according to an embodiment of the present disclosure;

[0037] FIG. 15 is a plan view of another display module according to an embodiment of the present disclosure;

[0038] FIG. 16 is a step diagram of a manufacturing method of another display module according to an embodiment of the present disclosure;

[0039] FIG. 17 is a step diagram of a manufacturing method of another display module according to an embodiment of the present disclosure;

[0040] FIG. 18 is a cross-sectional view of a back film layer according to an embodiment of the present disclosure;

[0041] FIG. 19 is a plan view of a back film layer according to an embodiment of the present disclosure;

[0042] FIG. 20 is a plan view of another back film layer according to an embodiment of the present disclosure;

[0043] FIG. 21A is a plan view of another display module according to an embodiment of the present disclosure;

[0044] FIG. 21B is a plan view of another display module according to an embodiment of the present disclosure;

[0045] FIG. 22 is a plan view of a connection starting line according to an embodiment of the present disclosure;

[0046] FIG. 23 is a plan view of another connection starting line according to an embodiment of the present disclosure;

[0047] FIG. 24 is a cross-sectional view of a connection starting line and a groove according to an embodiment of the present disclosure;

[0048] FIG. 25 is a cross-sectional view of another connection starting line and a groove according to an embodiment of the present disclosure;

[0049] FIG. 26 is a determination method of a connection starting line according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0050] The technical solutions in some embodiments of the present disclosure will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present disclosure.

[0051] Unless the context clearly requires otherwise, throughout the description and the claims, the term "comprise," and variations thereof (e.g., "comprises" and "comprising"), will be construed to be inclusive in a manner consistent with the term's plain meaning, namely, "including but not limited to." In describing the description, the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example" or "some examples," and the like, mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the disclosure, but that it can not be included in other embodiments or examples. The illustrative appearance of the foregoing terms in various places in the description are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0052] Hereinafter, the terms "first", "second", etc. are used only for the purpose of description and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the disclosure, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0053] In describing some embodiments, "coupled" and "connected," and variations thereof, can be used. The term "connected" should be interpreted broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrated; can be directly connected, or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components have direct physical contact or electrical contact. The term "coupled" or "communicatively coupled" can also mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content herein.

[0054] "A, B, and C at least one of" has the same meaning as "at least one of A, B, or C", and includes the following combinations of A, B, and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0055] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0056] As used herein, the term "if' is, optionally, interpreted as meaning "when" or "while" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [stated condition or event] is detected" is, optionally, interpreted as meaning "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0057] Use of "adapted to" or "configured to" herein means open and inclusive language that does not exclude additional devices or steps not specifically recited.

[0058] Additionally, use of "based on" means open and inclusive, as the process, step, calculation, or other action based on a stated condition or value can actually be based on additional conditions or values beyond those stated.

[0059] As used herein, "about," "approximately," or "circa" includes the recited value and the mean within an acceptable range of deviation from the particular value, as determined by one of ordinary skill in the art considering the measurement in question and the error in measuring the particular quantity (i.e., the limitations of the measurement system).

[0060] As used herein, "parallel," "perpendicular," "equal" includes the recited condition and conditions that approximate the recited condition, the approximation being within an acceptable range of deviation, as determined by one of ordinary skill in the art considering the measurement in question and the error in measuring the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and near parallel, where the acceptable range of deviation for near parallel can be, for example, within 5°; "perpendicular" includes absolute perpendicular and near perpendicular, where the acceptable range of deviation for near perpendicular can also be, for example, within 5°. "Equal" includes absolute equality and near equality, where the acceptable range of deviation for near equality can be, for example, a difference between the two that is less than or equal to 5% of either.

[0061] It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present.

[0062] Exemplary embodiments are described herein with reference to cross-sectional and / or plan view illustrations that are schematic and are not intended to be as actual views of individual layers of devices, regions of materials comprising part of the devices, and processes. In addition, for the purposes of clarity, the various elements of the drawings are not drawn on a common scale, nor are the various elements of the drawings necessarily drawn to scale, as some elements are shown exaggerated in scale to help improve understanding of the exemplary embodiments. Thus, exemplary embodiments should not be construed as limited to the particular shapes of regions as illustrated herein, but are to include deviations in shapes that result, for example, from manufacturing. For example, a etched region illustrated as a rectangle will, typically, have jagged edges when fabricated. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region of a device and are not intended to limit the scope of exemplary embodiments.

[0063] The display device 1000 can be any device that displays, whether moving (e.g., video) or stationary (e.g., still images), and whether textual or pictorial. The display device 1000 includes, but is not limited to, televisions, cellular telephones, wearable devices, personal digital assistants (PDAs), augmented reality (AR) devices, virtual reality (VR) devices, hand-held or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, calculators, television monitors, flat panel displays, computer monitors, car display (e.g., odometer display, etc.), navigation instruments, cockpit controls and / or displays, camera view displays (e.g., for a rear view camera in a vehicle), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., display of images for a piece of jewelry), and the like. As shown in FIG. 1, the display device 1000 can be a wearable display product, such as a watch, and the present disclosure will be described with the display device 1000 as a watch.

[0064] Exemplarily, as shown in FIG. 2, the display device 1000 includes a display module 100, an integrated circuit (IC) 300, and a circuit board 200; the display module 100 is coupled with the circuit board 200 and the IC 300, the circuit board 200 is configured to transmit an electrical signal, such as a control signal, to the IC 300; the IC 300 is configured to provide an electrical signal, such as a control signal, to the display module 100, and the IC 300 transmits the electrical signal, such as the control signal, provided by the circuit board 200 to the display module 100.

[0065] Exemplarily, the circuit board 200 can be a rigid printed circuit board (PCB), a flexible printed circuit board (FPC), or a rigid-flexible printed circuit board.

[0066] Exemplarily, the driving chip 300 can be a central processing unit, a digital signal processor, a single-chip microcomputer, a programmable logic controller, or the like. For example, the driving chip 300 can further include a memory, and can further include a power module and the like, and can realize power supply and signal input and output functions through wires, signal lines, and the like arranged additionally. For example, the driving chip 300 can further include a hardware circuit and a computer executable code, and the like. The hardware circuit can include a conventional very large scale integration (VLSI) circuit or a gate array, and existing semiconductors such as logic chips, transistors, or other discrete elements; the hardware circuit can also include a field programmable gate array, a programmable array logic, a programmable logic device, and the like.

[0067] Exemplarily, as shown in FIG. 2, the display module 100 includes a display panel 10, a polarizing sheet 20, a connecting layer 30, and a cover plate 40. Along the thickness direction of the display module 100, the display panel 10, the polarizing sheet 20, the connecting layer 30, and the cover plate 40 are sequentially stacked.

[0068] In some embodiments, as shown in FIG. 3, the process flow of preparing the display device 1000 is as follows:

[0069] S1, providing an initial display panel 10'.

[0070] Exemplarily, the initial display panel 10' includes an initial main area AA' and an initial binding and bending area BB' located on one side of the initial main area AA', and a protective film PF is arranged on the initial main area AA' of the initial display panel 10', for protecting the initial main area AA' of the initial display panel 10'.

[0071] Exemplarily, the initial display panel 10' has a rectangular shape.

[0072] S2, forming an initial polarizing sheet 20' above the initial display panel 10'.

[0073] It can be understood that the protective film PF needs to be removed before the initial polarizing sheet 20' is formed.

[0074] Exemplarily, the initial polarizing sheet 20' has a rectangular shape and is formed on the initial main area AA' of the initial display panel 10'.

[0075] S3, cutting the initial binding and bending area BB', to form a binding and bending area BB of the display panel 10.

[0076] S4, binding the driving chip 300 and the circuit board 200 in the binding bending area BB.

[0077] S5, synchronously cutting the initial main body area AA' and the initial polarizer 20', to form the main body area AA and the polarizer 20 of the display panel 10.

[0078] Exemplarily, the display panel 10 comprises the main body area AA and the binding bending area BB.

[0079] S6, coating the connecting layer 30 above the polarizer 20.

[0080] Exemplarily, the orthographic projection of the connecting layer 30 on the display panel 10 is located in the main body area AA of the display panel 10. The boundary of at least one side of the connecting layer 30 can exceed the corresponding boundary of the polarizer 20. For example, the boundary of the connecting layer 30 close to the binding bending area BB of the display panel 10 can exceed the boundary of the polarizer 20 close to the binding bending area BB of the display panel 10.

[0081] S7, attaching the cover plate 40 to form the display device 1000.

[0082] Exemplarily, as shown in FIG. 4, the display device 1000 can be a flat display device 1000 from the form of the display device 1000, and the display surface a of the display device 1000 is a plane. As shown in FIG. 5, the display device 1000 can also be a curved display device 1000, and the display surface b of the display device 1000 is a curved surface.

[0083] For the flat display device 1000 as shown in FIG. 4, the first area 41 of the cover plate 40 is a plane, and the display panel 10, the polarizer 20 and the connecting layer 30 are correspondingly arranged on the first area 41 of the cover plate 40, that is, the orthographic projection of the display panel 10, the polarizer 20 and the connecting layer 30 on the cover plate 40 is located in the first area 41. The display panel 10, the polarizer 20 and the connecting layer 30 are all planes, and in the manufacturing process of the display device 1000, the display panel 10, the polarizer 20 and the connecting layer 30 are sequentially attached in a plane, and when the cover plate 40 is attached above the display panel 10, the polarizer 20 and the connecting layer 30, since the first area 41 of the cover plate 40 is attached above the connecting layer 30, that is, the part of the cover plate 40 attached with the connecting layer 30 is a plane, and the compression stress generated by the attachment between the cover plate 40 and the display panel 10, the polarizer 20 and the connecting layer 30 is uniformly distributed on the display panel 10, the polarizer 20 and the connecting layer 30, and does not cause compression deformation of the display panel 10, the polarizer 20 and the connecting layer 30.

[0084] Exemplarily, in order to meet the demand of narrow frame, as shown in FIG. 2, it is required to bend the part of the display panel 10 used for connecting the driving chip 300 to the non-display side of the display panel 10 to reduce the area of the display panel 10 used for connecting the driving chip 300 occupying too much frame. Since the position of the display panel 10 bent is a straight line, the polarizer 20, the connecting layer 30 and the like above the display panel 10 are difficult to be designed as a pure circular shape. Exemplarily, as shown in FIG. 6, the shape of the polarizer 20 can be, for example, that the first boundary 21 is a circular arc, the second boundary 22 is a straight line, and the connection between the first boundary 21 and the second boundary 22 of the polarizer 20 is an acute obtuse angle. The connecting layer 30 is the same as the polarizer 20.

[0085] For the curved display device 1000 as shown in FIG. 5, the first area 42 of the cover plate 40 is curved, and the display panel 10, the polarizer 20 and the connecting layer 30 are correspondingly arranged on the first area 42 of the cover plate 40, that is, the orthographic projection of the display panel 10, the polarizer 20 and the connecting layer 30 on the cover plate 40 is located in the first area 42. The display panel 10, the polarizer 20 and the connecting layer 30 are all planar, and in the manufacturing process of the display device 1000, the display panel 10, the polarizer 20 and the connecting layer 30 are sequentially attached in a planar manner. However, when the cover plate 40 is attached above the display panel 10, the polarizer 20 and the connecting layer 30, it is required to attach the first area 42 of the cover plate 40 above the connecting layer 30, that is, the part of the cover plate 40 attached with the connecting layer 30 is curved.

[0086] Exemplarily, in the process of attaching the cover plate 40 with a curved surface, the attachment between the cover plate 40 and the display panel 10, the polarizer 20 and the connecting layer 30 generates a compressive stress, and the compressive stress at the boundary where the display panel 10, the polarizer 20 and the connecting layer 30 overlap, that is, the boundary shown by the dashed line in FIG. 6, is larger than that at other positions of the display panel 10, the polarizer 20 and the connecting layer 30. Since the boundary of the polarizer 20 is composed of a circular arc boundary (the first boundary 21) and a straight line boundary (the second boundary 22), and the connection between the circular arc boundary (the first boundary 21) and the straight line boundary (the second boundary 22) forms an acute obtuse angle 23, the connecting layer 30 is the same as the polarizer 20, which will not be described herein again. The boundary where the display panel 10, the polarizer 20 and the connecting layer 30 overlap includes a first stress boundary 1 and a second stress boundary 2. The first stress boundary 1 is composed of the circular arc boundary (the first boundary 31) of the connecting layer 30. The second stress boundary 2 is composed of part of the straight line boundary (the second boundary 22) of the polarizer 20, that is, the boundary shown by the dashed line in FIG. 6. An acute obtuse angle A is formed at the connection between the first stress boundary 1 and the second stress boundary 2.

[0087] Exemplarily, in the process of attaching the cover plate 40 with the curved surface, the compression stress generated by the attachment does not uniformly distribute on the display panel 10, the polarizer 20 and the connecting layer 30. As shown in FIG. 7, the compression stress generated by the attachment is larger at the boundary where the display panel 10, the polarizer 20 and the connecting layer 30 overlap, and the compression stress generated by the attachment uniformly distributes on the first stress boundary 1 and shows a tendency of concentrating towards the obtuse angle A; the compression stress generated by the attachment uniformly distributes on the second stress boundary 2 and shows a tendency of concentrating towards the obtuse angle A. Therefore, the compression stress at the sharp obtuse angle A is affected by the compression stress on the first stress boundary 1 and the compression stress on the second stress boundary 2, the compression stress generated by the attachment of the curved cover plate 40 is more concentrated at the sharp obtuse angle A, and the compression stress at the sharp obtuse angle A is more difficult to release, resulting in a larger compression stress at the sharp obtuse angle A. Therefore, the compression stress generated by the attachment of the cover plate 40 does not uniformly distribute at the boundary where the display panel 10, the polarizer 20 and the connecting layer 30 overlap, that is, the compression stress generated by the attachment of the curved cover plate 40 does not uniformly distribute on the display panel 10, the polarizer 20 and the connecting layer 30, respectively, so that the display panel 10, the polarizer 20 and the connecting layer 30 are compressed and deformed under the action of the unevenly distributed compression stress, resulting in a change in the propagation direction of the light emitted by the display panel 10 at the connection between the first boundary 21 and the second boundary 22 of the polarizer 20, as shown in FIG. 8, resulting in a light and shadow phenomenon of the display device 1000, affecting the product quality.

[0088] In some embodiments, the present application provides a display module 100. As shown in FIGS. 9A and 9B, and in combination with FIGS. 10 and 12, the display module 100 includes a display panel 10, a polarizer 20, a connecting layer 30 and a cover plate 40. The display panel 10 includes a main body area AA and a binding bending area BB located on one side of the main body area AA, and the main body area AA includes a display area AA1, and the display area AA1 includes a plurality of sub-pixels SP. The polarizer 20 is arranged on the display side of the display panel 10, and the orthographic projection of the polarizer 20 on the display panel 10 is located within the main body area AA of the display panel 10; the polarizer 20 includes a first boundary 21 and a second boundary 22, the second boundary 22 is located between the first boundary 21 and the binding bending area BB, and the connection between the first boundary 21 and the second boundary 22 is a circular arc chamfer 3. The connecting layer 30 is arranged on the side of the polarizer 20 away from the display panel 10, the orthographic projection of the connecting layer 30 on the display panel 10 is located within the main body area AA of the display panel 10, and covers the orthographic projection of the polarizer 20 on the display panel 10. The cover plate 40 is arranged on the side of the connecting layer 30 away from the polarizer 20, and the cover plate 40 is attached to the connecting layer 30 with a curved surface.

[0089] Exemplarily, the display panel 10 is used for displaying images. From the light-emitting type of the display panel 10, the display panel 10 can be an active light-emitting display panel, for example, an Organic Light-Emitting Diode (OLED) display panel, a Quantum Dot Light Emitting Diodes (QLED) display panel, or a Mini Light Emitting Diodes (MLED) display panel, etc. The display panel 10 can also be a passive light-emitting display panel, for example, a Liquid Crystal Display (LCD) display panel. Embodiments of the present disclosure are illustratively described with the OLED display panel 10, but embodiments of the present disclosure are not limited thereto.

[0090] OLED belongs to a current type of organic light-emitting device, which is a phenomenon of light emission by injection and recombination of carriers. The light-emitting intensity is proportional to the injected current. Under the action of an electric field, holes generated by the anode and electrons generated by the cathode will move and be injected into the hole transport layer and the electron transport layer, respectively, and migrate to the light-emitting layer. When the two meet in the light-emitting layer, energy excitons are generated, thereby exciting light-emitting molecules to ultimately produce visible light. Light-emitting molecules produce red, green, and blue three primary colors (RGB three primary colors) depending on their formulations, constituting the basic colors. The OLED display panel 10 has the advantages of high brightness, high efficiency, wide viewing angle, self-emission, full solid state, ultra-thin and ultra-light, simple manufacturing process, fast response speed, full-color display, and good mechanical processing performance, etc. Therefore, it has been more and more widely applied in various display devices such as mobile phones, tablets, computers, and televisions.

[0091] Exemplarily, as shown in FIG. 11, the display panel 10 includes a main area AA and a binding bending area BB located on one side of the main area AA. The main area AA is an area of the display panel 10 for displaying a picture, and the binding bending area BB is an area of the display panel 10 other than the main area AA, which is used for connecting the circuit board 200 and the driving chip 300, and can bend the circuit board 200 and the driving chip 300 to the non-display side of the display panel 10, i.e., the back, to achieve a narrow frame design. The main area AA includes a display area AA1 and a peripheral area AA2. The display area AA1 is used for displaying a picture, and the peripheral area AA2 is used for setting signal lines, such as initialization signal lines, data signal lines, etc., to ensure normal display of the display panel 10. The peripheral area AA2 can be located on at least one side (for example, one side, and for example, multiple sides) of the display area AA1. For example, as shown in FIG. 11, the peripheral area AA2 can be arranged around the display area AA1.

[0092] Exemplarily, as shown in FIG. 11, the binding bending area BB of the display panel 10 includes a bending area BB1 and a binding area BB2 located on the side of the bending area BB1 away from the main body area AA. The display panel 10 has a display side, and the side of the display panel 10 from which light is emitted is the display side, and the side of the display panel 10 from which light is not emitted is the non-display side. The binding area BB2 is connected with the circuit board 200 and the driving chip 300, and the display panel 10 is bent at the bending area BB1 so that the binding area BB2 is bent to the side opposite to the display side of the display panel 10, i.e., the non-display side.

[0093] Exemplarily, as shown in FIG. 12, the display area AA1 of the display panel 10 is provided with a plurality of pixels P. The plurality of pixels P are arranged in an array in the display area AA1, for example, a circular array or a rectangular array. Each pixel P includes a plurality of sub-pixels SP, and each sub-pixel SP can display a single color, for example, a pixel P includes a first sub-pixel, a second sub-pixel and a third sub-pixel, which display red, green or blue respectively. By adjusting the brightness (gray scale) of different color sub-pixels SP, a variety of colors can be displayed through color combination and superposition, so as to realize full-color display of the display panel 10.

[0094] Exemplarily, the sub-pixel SP is the smallest unit for the display panel 10 to display a picture. As shown in FIG. 12, each sub-pixel SP includes a light emitting device E and a pixel driving circuit D for controlling the light emitting device E to emit light. That is, one sub-pixel SP corresponds to one pixel driving circuit D. The plurality of sub-pixels SP are arranged according to a specified rule in the display area AA1, and exemplarily, the plurality of sub-pixels SP are arranged in multiple rows and multiple columns. Since each sub-pixel SP corresponds to one pixel driving circuit D, the pixel driving circuit D is also arranged in multiple rows and multiple columns.

[0095] Exemplarily, the light emitting device E can emit light, for example, the light emitting device E can emit one of red light, green light, blue light or white light. By emitting light through the plurality of light emitting devices E arranged in the display area AA1, the part of the display panel 10 located in the display area AA1 can display an image. The light emitting device E includes but is not limited to one of OLED, QLED, Mini LED, Micro LED, LED, etc.

[0096] Exemplarily, the pixel driving circuit D can be configured to provide an electrical signal (e.g., a driving voltage or a driving current) to the light emitting device E coupled with the pixel driving circuit D in response to the received scan signal and the data signal (e.g., a scan signal output by the scan driving circuit and a data signal output by the data driving circuit) to drive the light emitting device E to emit light, so that the display panel 10 can display an image. The pixel driving circuit D can include a plurality of transistors and at least one (e.g., one; or a plurality) capacitor. For example, the pixel driving circuit D can be of a structure of “2T1C”, “6T1C”, “7T1C”, “6T2C”, or “7T2C”, etc. Here, “T” represents a transistor, e.g., a thin film transistor. The number before “T” represents the number of transistors. “C” represents a capacitor, and the number before “C” represents the number of capacitors.

[0097] Exemplarily, in each sub-pixel SP, the light emitting device E is electrically connected with the corresponding pixel driving circuit D below, specifically, the anode of the light emitting device E is electrically connected with the corresponding pixel driving circuit D, so that the anode voltage input into the inside of the display panel 10 is transmitted to the anode of the light emitting device E through the pixel driving circuit D, and at the same time, a cathode voltage is transmitted to the cathode of the light emitting device E, so that an electric field is formed between the anode and the cathode to drive the light emitting device E to emit light.

[0098] Exemplarily, as shown in FIG. 11, the peripheral area AA2 can be located at least one side (e.g., one side; or a plurality of sides) of the display area AA1. For example, the peripheral area AA2 can be arranged around the display area AA1, so that a part of the peripheral area AA2 is located between the display area AA1 and the bending area BB1.

[0099] Exemplarily, the peripheral area AA2 is used to arrange a gate driving circuit GOA (Gate driver on Array, GOA), a control signal line (such as a clock signal line CLK, a start signal line STV, etc.), the gate driving circuit GOA is connected with the pixel driving circuit D of the sub-pixel SP through a gate line, and is used to control the pixel driving circuit D to work, and the control signal line is connected with the gate driving circuit GOA, and is used to transmit a signal required for the gate driving circuit GOA to work.

[0100] Exemplarily, the peripheral area AA2 is also provided with a power voltage signal line (e.g., a VDD line, a VSS line), and the power voltage signal line is connected with the above plurality of sub-pixels SP to provide a power required for the sub-pixel SP to emit light.

[0101] Exemplarily, as shown in FIG. 13, the display panel 10 includes an array substrate 11, a light emitting device layer 12, and an encapsulation layer 13 arranged in sequence. The array substrate 11 includes a substrate substrate 111 and a circuit layer 112 arranged in sequence.

[0102] Exemplarily, the substrate 111 supports other structures in the display panel 10. The substrate 111 can be a flexible substrate. The material of the flexible substrate can be polyethylene terephthalate (PET), polyethylene naphthalate two formic acid glycol ester (PEN), ultra-thin glass, or polyimide (PI), etc. The substrate 111 can also be a rigid substrate. The rigid substrate can be a glass substrate or a PMMA (Polymethyl methacrylate) substrate, etc.

[0103] Exemplarily, as shown in FIG. 13, the array substrate 11 further includes a circuit layer 112 disposed on the substrate 111. The circuit layer 112 includes a plurality of pixel driving circuits. Specifically, the circuit layer 112 can include a plurality of conductive layers configured to form a plurality of pixel driving circuits and a plurality of signal lines for driving the pixel circuits. The plurality of conductive layers can include, for example, a semiconductor layer ACT, a gate conductive layer GT, a first source-drain conductive layer SD1, and a second source-drain conductive layer SD2 disposed in sequence in a direction perpendicular to and away from the substrate 111. Of course, the array substrate 11 can also include other conductive layers, such as a third source-drain conductive layer, and the gate conductive layer GT can include a first gate conductive layer GT1 and a second gate conductive layer GT2, which are not limited here.

[0104] Exemplarily, as shown in FIG. 13, the plurality of conductive layers form a plurality of transistors, which can include a semiconductor pattern T11 located in the semiconductor layer ACT, a gate T12 located in the gate conductive layer GT, and a source T13 and a drain T14 located in the first source-drain conductive layer SD1.

[0105] Exemplarily, the circuit layer 112 can further include an insulating layer between adjacent conductive layers for preventing connection between adjacent conductive layers. For example, as shown in FIG. 13, the array substrate 11 can include a gate insulating layer GI between the semiconductor layer ACT and the gate conductive layer GT, an interlayer dielectric layer ILD between the gate conductive layer GT and the first source-drain conductive layer SD1, and a passivation layer PVX and a first planarization layer PLN1 between the first source-drain conductive layer SD1 and the second source-drain conductive layer SD2, a second planarization layer PLN2 between the second source-drain conductive layer SD2 and the light emitting device layer 12. Of course, the circuit layer 112 can also include other insulating film layers, which are not described one by one here.

[0106] Exemplarily, as shown in FIG. 13, the light-emitting device layer 12 includes a first electrode layer 121, a light-emitting layer 122, and a second electrode layer 123 which are stacked in a direction away from the array substrate 11. The light-emitting device layer 12 includes a plurality of light-emitting devices, and the second electrodes of the plurality of light-emitting devices are connected to each other to form a continuous whole layer structure. The display panel 10 can further include a pixel definition layer PDL which is disposed on one side of the array substrate 11 and includes a plurality of openings, the first electrode layer 121 includes a plurality of first electrodes, the light-emitting layer 122 includes a plurality of light-emitting portions, and at least part of one first electrode and at least part of one light-emitting portion are located in one opening, wherein one light-emitting device is connected to one pixel driving circuit.

[0107] Exemplarily, the first electrode layer 121 can be formed of a transparent conductive material with a high work function, and the electrode material thereof can include indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), gallium zinc oxide (GZO), zinc oxide (ZnO), indium oxide (In2O3), aluminum zinc oxide (AZO), carbon nanotubes, and the like. The first electrode layer 121 can include only one layer of transparent conductive material, or can include a plurality of layers of transparent conductive material. For example, each first electrode includes three layers of conductive material, which are indium tin oxide, silver, and indium tin oxide, respectively. The second electrode layer 123 can be formed of a material with high conductivity and low work function, for example, and the electrode material thereof can include alloys such as magnesium aluminum alloy (MgAl) and lithium aluminum alloy (LiAl), or elemental metals such as magnesium (Mg), aluminum (Al), lithium (Li), and silver.

[0108] Exemplarily, the light-emitting layer 122 includes an organic light-emitting layer (EML), and the material of the organic light-emitting layer can include low-molecular-weight organic materials or polymer materials, which are fluorescent or phosphorescent materials that can emit red light, green light, blue light, or white light under the action of an electric field. In order to improve the light-emitting efficiency of the light-emitting device in the display panel 10, in addition to the organic light-emitting layer, the light-emitting layer 122 can further include one or more of an electron transporting layer (ETL), an electron injection layer (EIL), a hole transporting layer (HTL), and a hole injection layer (HIL).

[0109] Exemplarily, as shown in FIG. 13, the encapsulation layer 13 is located on the side of the light-emitting device layer 12 away from the array substrate 11. Exemplarily, the encapsulation layer 13 can include a first inorganic encapsulation layer 131, an organic encapsulation layer 132, and a second inorganic encapsulation layer 133, wherein the first inorganic encapsulation layer 131 and the second inorganic encapsulation layer 133 can be formed by a plasma chemical vapor deposition process, and the organic encapsulation layer 132 can be formed by an inkjet printing process. The encapsulation layer 13 is used to encapsulate the light-emitting device layer 12, avoid water and oxygen in the environment from entering the light-emitting device layer 12, and play a role in protecting the light-emitting device layer 12, avoiding the water and oxygen in the outside world from corroding the display panel 10.

[0110] Exemplarily, as shown in FIG. 9A, and in combination with FIG. 11, the polarizer 20 is disposed on the display side of the display panel 10 and has a polarizing performance. The orthographic projection of the polarizer 20 on the display panel 10 is located in the main area AA of the display panel 10. It can be understood that the polarizer 20 covers the display area AA1 of the display panel 10, that is, the orthographic projection of the polarizer 20 on the display panel 10 is located in the peripheral area AA2 of the main area AA of the display panel 10. The polarizer 20 is configured to make the non-polarized light emitted by the display panel 10 and passing through the polarizer 20 become polarized light, improve the uniformity of the light emitted from the display panel 10, and thus weaken the rainbow stripes appearing in the display image of the display panel 10, so as to improve the display effect of the display module 100. The polarizer 20 can be a variety of types of polarizers such as a transmissive polarizer, a reflective polarizer, a semi-transmissive reflective polarizer, and a compensation type polarizer, and the embodiments of the present disclosure do not limit this.

[0111] Exemplarily, as shown in FIG. 10, the polarizer 20 includes a first boundary 21 and a second boundary 22, and the connection between the first boundary 21 and the second boundary 22 is a circular arc chamfer 3. It can be understood that the circular arc chamfer 3 refers to a smooth circular arc with an included angle, that is, the connection between the first boundary 21 and the second boundary 22 of the polarizer 20 is a smooth circular arc, rather than a sharp obtuse angle formed by the connection of a circular arc and a straight line.

[0112] Exemplarily, as shown in FIGS. 9A and 9B, the connecting layer 30 is arranged between the polarizing sheet 20 and the cover plate 40, and is used to adhere the polarizing sheet 20 and the cover plate 40. That is, the connecting layer 30 is arranged on the side of the polarizing sheet 20 away from the display panel 10; the orthographic projection of the connecting layer 30 on the display panel 10 covers the orthographic projection of the polarizing sheet 20 on the display panel 10, that is, the area of the connecting layer 30 is greater than or equal to the area of the polarizing sheet 20, and the boundary of the connecting layer 30 coincides with or surrounds the boundary of the polarizing sheet 20. It can be understood that the orthographic projection of the connecting layer 30 on the display panel 10 is located within the boundary of the display panel 10, that is, the connecting layer 30 is located in the main area AA of the display panel 10. The material of the connecting layer 30 can be an adhesive material, which can include at least one of an optically clear adhesive (OCA), a liquid optical clear adhesive (LOCA), or an ultraviolet curing adhesive, but is not limited thereto, and can also be other adhesive materials that can achieve connection. For example, the connecting layer 30 is a thermal-melt optical clear adhesive (TOCA) film.

[0113] Exemplarily, as shown in FIGS. 9A and 9B, the cover plate 40 is arranged on the display side of the display panel 10, and is used to protect the display panel 10. It can be understood that the cover plate 40 is arranged on the side of the connecting layer 30 away from the polarizing sheet 20, and the cover plate 40 covers the boundary of the polarizing sheet 20 and the connecting layer 30, and covers the display panel 10. As shown in FIG. 14, the cover plate 40 is, for example, a curved cover plate, that is, the adhering area 43 of the cover plate 40 is curved, and it can be understood that the adhering area 43 of the cover plate 40 is curved and protrudes from the middle of the side away from the connecting layer 30 to the side close to the connecting layer 30. The cover plate 40 includes oppositely arranged first and second surfaces 401 and 402, which are curved, wherein the first surface 401 is the side surface of the cover plate 40 away from the connecting layer 30, and the second surface 402 is the side surface of the cover plate 40 close to the connecting layer 30, and the part of the second surface 402 located in the adhering area 43 adheres to the side of the connecting layer 30 away from the polarizing sheet 20. At this time, the cover plate 40, the connecting layer 30, the polarizing sheet 20, and the main area AA of the display panel 10 are adhered in sequence.

[0114] The application sets the connecting part of the boundary of the polarizer 20 of the display module 100 as an arc chamfer. Exemplarily, the boundary of the polarizer 20 includes a first boundary 21 and a second boundary 22, and the connecting part of the first boundary 21 and the second boundary 22 is a circular arc chamfer 3. Since the side of the cover plate 40 close to the connecting layer 30 is a curved surface, when the cover plate 40 is attached, the compression stress is generated between the cover plate 40 and the display panel 10, the polarizer 20 and the connecting layer 30, and the compression stress at the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap, i.e., the boundary Z shown by the dashed line in FIG. 9A, is greater than that at other positions of the display panel 10, the polarizer 20 and the connecting layer 30. Since the orthographic projection of the polarizer 20 on the display panel 10 is located in the main body area AA of the display panel 10, the orthographic projection of the connecting layer 30 on the display panel 10 covers the orthographic projection of the polarizer 20 on the display panel 10, i.e., the area of the connecting layer 30 is greater than or equal to the area of the polarizer 20, the boundary of the connecting layer 30 coincides with the boundary of the polarizer 20 or the boundary of the connecting layer 30 surrounds the boundary of the polarizer 20, therefore, the boundary of the polarizer 20 is located in the boundary of the display panel 10 and is located in the boundary of the connecting layer 30, and the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap is the boundary of the polarizer 20.

[0115] When the curved cover plate 40 is attached, the compression stress at the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap is greater, and since the connecting part of the first boundary 21 and the second boundary 22 of the polarizer 20 is a circular arc chamfer 3, i.e., the connecting part of the third stress edge Z1 and the fourth stress edge Z2 of the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap is a circular arc chamfer 3, the circular arc chamfer 3 connects the third stress edge Z1 and the fourth stress edge Z2 into a pattern close to a circle, the compression stress at the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap is uniformly released at the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap close to a circle, the compression stress changes more uniformly, and the hard angle bending due to the stress concentration mutation is avoided, thereby avoiding the problems of film layer separation and cracking of the display panel 10, solving the problem of light and shadow disorder of the display module 100, and improving the display effect of the display module 100.

[0116] In some embodiments, as shown in FIG. 15, the orthographic projection of the connecting layer 30 on the display panel 10 coincides with the orthographic projection of the polarizer 20 on the display panel 10.

[0117] Exemplarily, as shown in FIG. 15, the orthographic projection of the connecting layer 30 on the display panel 10 coincides with the orthographic projection of the polarizer 20 on the display panel 10, that is, the size and shape of the connecting layer 30 are the same as those of the polarizer 20, and the boundary of the connecting layer 30 completely coincides with that of the polarizer 20. The boundary of the connecting layer 30 includes the first boundary 31 and the second boundary 32, and the connecting layer 30 has a circular arc chamfer 3 at the included angle between the first boundary 31 and the second boundary 32, like the polarizer 20.

[0118] Exemplarily, since the second surface 402 of the cover plate 40 close to the connecting layer 30 is a curved surface, when the cover plate 40 is attached, the compression stress generated by the attachment between the cover plate 40 and the display panel 10, the polarizer 20 and the connecting layer 30 is larger at the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap, that is, the boundary Z shown by the dashed line in FIG. 15. Since the orthographic projection of the polarizer 20 on the display panel 10 is located in the main area AA of the display panel 10, the boundary of the connecting layer 30 completely coincides with that of the polarizer 20, and thus the boundary of the polarizer 20 and the connecting layer 30 is located in the boundary of the display panel 10, and the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap is the boundary of the polarizer 20 or the connecting layer 30. When the curved cover plate 40 is attached, the compression stress at the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap is larger. Since the connecting part of the first boundary 21 and the second boundary 22 of the polarizer 20 is a circular arc chamfer 3, that is, the connecting part of the third stress edge Z1 and the fourth stress edge Z2 of the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap is a circular arc chamfer 3, the circular arc chamfer 3 connects the third stress edge Z1 and the fourth stress edge Z2 into a nearly circular pattern, the compression stress at the boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap is uniformly released at the nearly circular boundary Z where the display panel 10, the polarizer 20 and the connecting layer 30 overlap, the compression stress changes more uniformly, avoiding the hard angle bending caused by the stress concentration mutation, thereby avoiding the separation and cracking of the film layer of the display panel 10, solving the problem of light and shadow disorder of the display module 100, and improving the display effect of the display module 100.

[0119] The connecting layer 30 is completely coincident with the boundary of the polarizing sheet 20. It can be understood that the connecting layer 30 and the polarizing sheet 20 can be integrally cut, and the connecting layer 30 and the polarizing sheet 20 are integrally supplied. The connecting layer 30 is completely coincident with the boundary of the polarizing sheet 20, which simplifies the manufacturing process and avoids the problem of display defects caused by the connecting layer 30 exceeding the boundary of the polarizing sheet 20. For example, when the connecting layer 30 exceeds the boundary of the polarizing sheet 20 and contacts the curved cover plate 40, although the compression stress is small, there is a certain probability that the boundary of the connecting layer 30 will deform, thereby avoiding the deformation of the connecting layer 30 caused by the deformation of the boundary of the connecting layer 30, and thus avoiding the problem of display defects caused by the deformation of the polarizing sheet 20 caused by the deformation of the connecting layer 30. At the same time, the connecting layer 30 is completely coincident with the boundary of the polarizing sheet 20, which is beneficial to the realization of narrow frame design compared with the connecting layer 30 covering the polarizing sheet 20.

[0120] Based on the structure of the display module 100, the application provides a preparation method of the display module 100. As shown in FIG. 16, the preparation method of the display module 100 includes:

[0121] S1, providing a polarizing sheet 20, the polarizing sheet 20 including a first boundary 21 and a second boundary 22, and the connecting part of the first boundary 21 and the second boundary 22 being a circular arc chamfer 3.

[0122] Exemplarily, the structure and material of the polarizing sheet 20 can be referred to the above description, which will not be repeated here. The polarizing sheet 20 has been shaped in this step, that is, the shape structure of the polarizing sheet 20 has been determined in this step, and the polarizing sheet 20 will not be cut in the subsequent steps.

[0123] S2, disposing a connecting layer 30 on one side of the polarizing sheet 20, and the connecting layer 30 covering the polarizing sheet 20.

[0124] Exemplarily, the structure and material of the connecting layer 30 can be referred to the above description, which will not be repeated here. The connecting layer 30 has been shaped in this step, that is, the shape structure of the connecting layer 30 has been determined in this step, and the connecting layer 30 will not be cut in the subsequent steps.

[0125] S3, forming an initial display panel 10' on the side of the polarizing sheet 20 away from the connecting layer 30, the initial display panel 10' including a preset main area A' and a preset binding bending area B' located on one side of the preset main area A', the preset main area A' of the initial display panel 10' including a display area AA1, and the display area AA1 including a plurality of sub-pixels SP; the polarizing sheet 20 and the connecting layer 30 are located on the display side of the initial display panel 10', and the polarizing sheet 20 and the connecting layer 30 are located in the preset main area A' of the initial display panel 10'; and the second boundary 22 of the polarizing sheet 20 is located between the first boundary 21 and the preset binding bending area B'.

[0126] Exemplarily, the initial display panel 10' includes a preset main body area A', a preset binding bending area B' located at one side of the preset main body area A', and a to-be-cut area C' except the preset main body area A' and the preset binding bending area B'. The polarizer 20 is located at the preset main body area A' of the initial display panel 10', so as to prevent the polarizer 20 from being cut and affect the polarization performance of the polarizer 20.

[0127] S4, cutting the initial display panel 10' to form the display panel 10; the preset main body area A' of the initial display panel 10' is the main body area AA of the display panel 10, and the preset binding bending area B' of the initial display panel 10' is the binding bending area BB of the display panel 10.

[0128] Exemplarily, the structure and material of the display panel 10 can refer to the above description, which will not be repeated here. When the initial display panel 10' is cut, the to-be-cut area C' of the initial display panel 10' is cut off, and the preset main body area A' and the preset binding bending area B' of the initial display panel 10' are reserved. The preset main body area A' of the initial display panel 10' is the main body area AA of the display panel 10, and the preset binding bending area B' of the initial display panel 10' is the binding bending area BB of the display panel 10, thereby forming the display panel 10. Since the shapes and structures of the polarizer 20 and the connecting layer 30 have been determined in the first step S1 and the second step S2, respectively, only the initial display panel 10' is cut during the process of cutting the initial display panel 10' to form the display panel 10, and the polarizer 20 and the connecting layer 30 are not cut.

[0129] S5, forming the cover plate 40, the cover plate 40 is arranged at the side of the connecting layer 30 away from the polarizer 20, and the cover plate 40 is curvedly attached to the connecting layer 30.

[0130] In some implementations of the display device 1000, the initial display panel 10' can be cut to form the bending area BB1 and the binding area BB2 of the display panel 10 first, and the driving chip 300 and the circuit board 200 are connected to the binding area BB2; then the cover plate 40 is attached.

[0131] In another implementation of the display device 1000, the driving chip 300 and the circuit board 200 can also be connected to the binding area BB2 of the display panel 10 after the display module 100 is formed. The present disclosure does not make any limitation here.

[0132] In some embodiments, the connecting layer 30 and the polarizer 20 are integrally cut, and the connecting layer 30 and the polarizer 20 completely overlap.

[0133] Exemplarily, the first step S1 and the second step S2 in the preparation method of the display module 100 can be combined into one step, for example, as shown in FIG. 17, S12, the initial connecting layer 30' can be formed on one side of the initial polarizer 20', and then the polarizer 20 and the connecting layer 30 with uniform shape and size are cut at the same time. The polarizer 20 includes the first boundary 21 and the second boundary 22, and the connection between the first boundary 21 and the second boundary 22 is a circular arc chamfer 3. The connecting layer 30 includes the first boundary 31 and the second boundary 32, and the connection between the first boundary 31 and the second boundary 32 is a circular arc chamfer 3. In this way, the polarizer 20 and the connecting layer 30 can be formed at the same time without cutting the initial polarizer 20' to form the polarizer 20 and cutting the initial connecting layer 30' to form the connecting layer 30, which can simplify the preparation steps of the display module 100.

[0134] In the preparation method of the display module 100, the polarizer 20 is first cut and shaped, and the polarizer 20 is shaped such that the connection between the first boundary 21 and the second boundary 22 is a circular arc chamfer 3, i.e., the connection between the circular arc-shaped first boundary 21 and the linear second boundary 22 is a smooth arc line. After the transition of the circular arc-shaped first boundary 21 and the linear second boundary 22 through the smooth arc line, the circular arc-shaped first boundary 21 and the linear second boundary 22 will form a boundary close to a circle. At this time, the boundary of the polarizer 20 has no sharp angle, and the boundary of the polarizer 20 is a smooth curve. After applying a compression force to the polarizer 20, the stress generated by the polarizer 20 will be uniformly distributed and released on the smooth curve boundary, avoiding the hard angle bending caused by stress concentration mutation and affecting the performance of the polarizer 20. The connecting layer 30 is the same as the polarizer 20, which will not be described here.

[0135] The preparation method of the display module 100 has the same structure and beneficial technical effects as the display module 100 provided in some embodiments described above, which will not be described here.

[0136] In some embodiments, as shown in FIG. 9A, the distance d1 from the boundary of the orthographic projection of the polarizer 20 on the display panel 10 to the boundary of the display panel 10 is at least 0.05 mm.

[0137] Exemplarily, in the preparation method of the display module 100, since there is a cutting tolerance when cutting the initial display panel 10', it is necessary to have a certain distance between the boundary of the normal projection of the polarizing plate 20 on the display panel 10 and the boundary of the display panel 10 to prevent the polarizing plate from being cut, for example, the distance d1 between the boundary of the normal projection of the polarizing plate 20 on the display panel 10 and the boundary of the display panel 10 is at least 0.05 mm, for example, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, etc.

[0138] In some embodiments, as shown in FIG. 10, the first boundary 21 of the polarizing plate 20 is a circular arc shape, the second boundary 22 is a straight line shape, and the radius of the circular arc where the circular arc chamfer 3 at the connection of the first boundary 21 and the second boundary 22 of the polarizing plate 20 is greater than or equal to 1 mm and less than or equal to the radius of the circular arc where the first boundary 21 is located.

[0139] Exemplarily, the circular arc shape is beneficial for dispersing stress, and the circular arc chamfer 3 connects the first boundary 21 and the second boundary 22 of the polarizing plate 20 into a boundary close to a circle, and the compression stress generated when the cover plate 40 is attached is uniformly dispersed from the boundary close to a circle of the polarizing plate 20, preventing the compression stress from being concentrated on the boundary of the polarizing plate 20. On the basis of meeting the narrow frame, the compression stress is prevented from being concentrated on the boundary of the polarizing plate 20, causing display disorder problems, which is beneficial for improving the display effect of the display module 100.

[0140] Exemplarily, due to the limitation of the manufacturing process, 1 mm is the minimum radius of the circular arc chamfer 3 of the polarizing plate 20 formed by cutting, so the radius of the circular arc where the circular arc chamfer 3 at the angle between the first boundary 21 and the second boundary 22 of the polarizing plate 20 is greater than or equal to 1 mm.

[0141] Exemplarily, if the first boundary 21 of the polarizer 20 is in the shape of an arc and the second boundary 22 of the polarizer 20 is in the shape of a straight line, and the first boundary 21 of the polarizer 20 and the second boundary 22 of the polarizer 20 form a complete circle (the second boundary 22 of the polarizer 20 is shorter), the radius of the arc of the chamfer 3 between the first boundary 21 of the polarizer 20 and the second boundary 22 of the polarizer 20 is equal to the radius of the arc of the first boundary 21 of the polarizer 20; if the second boundary 22 of the polarizer 20 is longer, the first boundary 21 of the polarizer 20 and the second boundary 22 of the polarizer 20 cannot form a complete circle, and the radius of the arc of the chamfer 3 at the angle between the first boundary 21 of the polarizer 20 and the second boundary 22 of the polarizer 20 is smaller than the radius of the arc of the first boundary 21 of the polarizer 20. In this way, it can be prevented that the chamfer 3 at the angle between the first boundary 21 of the polarizer 20 and the second boundary 22 of the polarizer 20 is too large, the chamfer 3 is in the shape of a straight line, and there is still a sharp angle at the angle between the first boundary 21 of the polarizer 20 and the second boundary 22 of the polarizer 20, which causes stress concentration at the connection between the first boundary 21 of the polarizer 20 and the second boundary 22 of the polarizer 20 and affects the display effect of the display module 100.

[0142] In some embodiments, as shown in FIG. 11, the binding bending area BB of the display panel 10 includes a bending area BB1. As shown in FIG. 2, the display module 100 further includes a back film layer 50. The back film layer 50 is arranged on the side of the display panel 10 away from the polarizer 20. As shown in FIG. 18, the back film layer 50 is provided with a groove 51 on the surface away from the display panel 10. The groove 51 is arranged on the bending area BB1 of the display panel 10. The groove 51 includes a first side surface 511 and a second side surface 512. The first side surface 511 is closer to the main area AA of the display panel 10 than the second side surface 512. As shown in FIG. 19, the first side surface 511 of the groove 51 is a circular arc surface protruding towards the second side surface 512.

[0143] In some embodiments, as shown in FIG. 19, the back film layer 50 includes a first part 50A on the side of the first side surface 511 of the groove 51. The first part 50A of the back film layer 50 includes a first boundary 52 and a second boundary 53. The first side surface 511 of the groove 51 is the second boundary 53 of the first part 50A of the back film layer 50. The first boundary 52 of the first part 50A of the back film layer 50 is in the shape of an arc. The connection between the first boundary 52 and the second boundary 53 of the first part 50A of the back film layer 50 is a chamfer 3 in the shape of an arc.

[0144] Exemplarily, as shown in FIG. 20, in some embodiments, the back film layer 50 is provided with a groove 51 away from the surface of the display panel 10, the first side surface 511 and the second side surface 512 of the groove 51 are both straight lines, and along the extension direction of the groove 51, the projection of the groove 51 on the bending area BB1 of the display panel 10 penetrates the bending area BB1, that is, the groove 51 divides the back film layer 50 into a first part 50A and a second part 50B, the first part 50A of the back film layer 50 includes a first boundary 52 in the shape of a circular arc and a second boundary 53 in the shape of a straight line, and the junction of the first boundary 52 in the shape of a circular arc and the second boundary 53 in the shape of a straight line of the first part 50A of the back film layer 50 forms an acute obtuse angle, which is similar to the structure of the polarizer 20. Therefore, the compression stress generated by the lamination of the curved cover plate 40 is more concentrated at the acute obtuse angle, and the compression stress at the acute obtuse angle is more difficult to release, resulting in a larger compression stress at the acute obtuse angle, which causes the problem of poor display.

[0145] Therefore, as shown in FIG. 19, the first side surface 511 of the groove 51 of the back film layer 50 can be provided as a circular arc surface protruding toward the second side surface 512. This setting makes the junction of the first boundary 52 in the shape of a circular arc and the second boundary 53 in the shape of a straight line of the first part 50A of the back film layer 50 have a circular arc chamfer 3, which connects the first boundary 52 in the shape of a circular arc and the second boundary 53 in the shape of a straight line of the first part 50A of the back film layer 50 to form a boundary close to a circle. When the cover plate 40 is laminated, the compression stress generated will be uniformly released at the boundary close to a circle, and the compression stress changes more uniformly, avoiding the hard angle bending caused by the stress concentration mutation, thereby avoiding the separation and cracking of the film layer of the display panel 10 above, solving the problem of poor light and shadow of the display module 100, and improving the display effect of the display module 100.

[0146] In some embodiments, as shown in FIG. 18, the groove 51 penetrates the back film layer 50 along the thickness direction of the back film layer 50.

[0147] In some embodiments, as shown in FIGS. 21A and 21B, and with reference to FIG. 22, the binding bending area BB of the display panel 10 further includes a binding area BB2 located away from the display area AA1 on one side of the bending area BB1. The display panel 10 includes a plurality of connection leads 15, the plurality of connection leads 15 are arranged at the bending area BB1, and the first end 151 of the plurality of connection leads 15 is located at the boundary of the main body area AA and the bending area BB1 or extends to the main body area AA, for example, extends to the main body area AA and is electrically connected with the plurality of sub-pixels SP, and the second end 152 of the plurality of connection leads 15 extends to the binding area BB2.

[0148] Exemplarily, to realize the design of narrow frame, the display panel 10 can be bent at the bending area BB1, so as to bend the binding area BB2 of the display panel 10 used for binding the driving chip 300 to the non-display side of the display panel 10. Since the plurality of signal lines of the main area AA of the display panel 10 need to be connected with the driving chip 300 bound to the binding area BB2, so as to control the display panel 10 to display, the plurality of signal lines of the main area AA of the display panel 10 need to extend through the bending area BB1 to the binding area BB2, and the plurality of signal lines at the bending area BB1 also need to be bent, so the plurality of signal lines at the bending area BB1 need to have strong bending resistance, otherwise the signal lines will be broken in the bending process, lose functionality, and affect the driving of the display panel 10.

[0149] Exemplarily, as shown in FIGS. 21A and 21B, a plurality of connection leads 15 can be arranged at the bending area BB1 of the display panel 10, and the plurality of connection leads 15 have good bending resistance and are not easy to be broken in the bending process. The first end 151 of the plurality of connection leads 15 is located at the boundary of the main area AA and the bending area BB1 or extends to the main area AA, and the first end 151 of the plurality of connection leads 15 is connected with the signal line of the main area AA of the display panel 10, such as a data signal line, so as to realize that the plurality of connection leads 15 are respectively electrically connected with the plurality of sub-pixels SP of the main area AA of the display panel 10. The second end 152 of the plurality of connection leads 15 extends to the binding area BB2 and is connected with the driving chip 300 and the circuit board 200 located at the binding area BB2. The driving chip 300 transmits the electrical signal, such as a control signal, provided by the circuit board 200 to the sub-pixel SP of the display panel 10, so as to control the display panel 10 to display a picture.

[0150] Exemplarily, the first end 151 of the plurality of connection leads 15 is connected with the signal line of the main area AA of the display panel 10 through a via in the main area AA of the display panel 10. It can be understood that, as shown in FIGS. 21A, 21B, 22 and 23, one signal line of the main area AA of the display panel 10 is connected with one connection lead 15 through a via.

[0151] Exemplarily, the plurality of connection leads 15 can be arranged at the first source-drain conductive layer SD1 or the second source-drain conductive layer SD2, that is, the material, such as metal material, of the first source-drain conductive layer SD1 and the second source-drain conductive layer SD2 has good bending resistance. This setting does not increase new film layers, and the connection leads 15 are arranged by using the existing film layers of the display panel 10, so as to simplify the manufacturing process and save costs.

[0152] Exemplarily, when the plurality of connection leads 15 are arranged on the first source-drain conductive layer SD1, the signal lines of the main area AA of the display panel 10 are arranged on the gate conductive layer GT (the first gate conductive layer GT1 and / or the second gate conductive layer GT2) for example, the first end 151 of the plurality of connection leads 15 is connected to the signal line on the first gate conductive layer GT1 through a via hole penetrating the insulating layer between the first source-drain conductive layer SD1 and the first gate conductive layer GT1; and / or the first end 151 of the plurality of connection leads 15 is connected to the signal line on the second gate conductive layer GT2 through a via hole penetrating the insulating layer between the first source-drain conductive layer SD1 and the second gate conductive layer GT2.

[0153] Exemplarily, when the plurality of connection leads 15 are arranged on the second source-drain conductive layer SD2, the signal lines of the main area AA of the display panel 10 are arranged on the gate conductive layer GT (the first gate conductive layer GT1 and / or the second gate conductive layer GT2) and the first source-drain conductive layer SD1 for example, the first end 151 of the plurality of connection leads 15 is connected to the signal line on the first source-drain conductive layer SD1 through a via hole penetrating the insulating layer between the second source-drain conductive layer SD2 and the first source-drain conductive layer SD1; the first end 151 of the plurality of connection leads 15 is connected to the signal line on the first gate conductive layer GT1 through a via hole penetrating the insulating layer between the second source-drain conductive layer SD2 and the first gate conductive layer GT1; and / or the first end 151 of the plurality of connection leads 15 is connected to the signal line on the second gate conductive layer GT2 through a via hole penetrating the insulating layer between the second source-drain conductive layer SD2 and the second gate conductive layer GT2.

[0154] It should be noted that the arrangement of the signal lines can be designed according to the actual product, and the arrangement of the plurality of connection leads 15 can also be designed according to the actual product, for example, a new lead layer can be added to arrange the plurality of connection leads 15, and the above description is only an exemplary description, which is not limited in the present disclosure.

[0155] Exemplarily, the second end 152 of the plurality of connection leads 15 extends to the binding area BB2, and the second end 152 of the plurality of connection leads 15 can be connected to the signal lines prepared together with the main area AA of the display panel 10 in the binding area BB2, and the connection mode is consistent with the connection mode of the first end 151 of the plurality of connection leads 15 and the signal lines of the main area AA, for example, the connection can be made through a via hole, which will not be described here. The second end 152 of the plurality of connection leads 15 can also be directly connected to the circuit board 200 and the driving chip 300, so that various signals required for inputting the display picture to the display panel 10, such as control signals, power voltage signals and data signals, can be realized.

[0156] In some embodiments, as shown in FIG. 22 and FIG. 23, the connection starting line 16 is formed by the first ends 151 of the plurality of connection leads 15. The connection starting line 16 can be a straight line or an arc line. As shown in FIG. 24, and referring to FIG. 20, the distance d2 between the normal projection of the first side 511 of the groove 51 of the back film layer 50 on the display panel 10 and the connection starting line 16 is 50-150 um.

[0157] Exemplarily, due to the process tolerance of the manufacturing process, in order to facilitate the connection of the connection leads 15 and the signal lines of the main area AA of the display panel 10, the first ends 151 of the plurality of connection leads 15 need to extend to the main area AA of the display panel 10 by a certain length, for example, the length of the first ends 151 of the plurality of connection leads 15 extending to the main area AA of the display panel 10 is 50-150 um, and at the same time, the groove 51 is arranged on the bending area BB1 of the display panel 10, so that the distance d2 between the normal projection of the first side 511 of the groove 51 of the back film layer 50 on the display panel 10 and the connection starting line 16 can be 50-150 um.

[0158] In some embodiments, as shown in FIG. 23, the connection starting line 16 is an arc line protruding towards the bending area BB1.

[0159] In some embodiments, as shown in FIG. 25, and referring to FIG. 20, the normal projection of the first side 511 of the groove 51 of the back film layer 50 on the display panel 10 is parallel to the connection starting line 16.

[0160] Exemplarily, in order to reduce the phenomenon of display disorder after the cover plate 40 is attached, the first side 511 of the groove 51 of the back film layer 50 is arranged as an arc surface protruding towards the second side 512. This arrangement makes the connection between the arc-shaped first boundary 52 and the straight second boundary 53 of the first part 50A of the back film layer 50 have an arc chamfer 3, which connects the arc-shaped first boundary 52 and the straight second boundary 53 of the first part 50A of the back film layer 50 to form a nearly circular boundary. The compression stress generated when the cover plate 40 is attached is uniformly released at the nearly circular boundary, the compression stress changes relatively uniformly, avoiding the hard angle bending caused by the sudden change of stress concentration, thereby avoiding the separation and cracking of the film layer of the display panel 10 above, solving the problem of light and shadow disorder of the display module 100, and improving the display effect of the display module 100.

[0161] If only the first side surface 511 of the groove 51 of the back film layer 50 is set as a circular arc surface protruding towards the direction of the second side surface 512, the connection starting line 16 formed by the connection of the first ends 151 of the plurality of connection leads 15 of the display panel 10 is set as a straight line, as shown in FIG. 24, the minimum distance between the connection starting line 16 and the orthographic projection of the first side surface 511 of the groove 51 of the back film layer 50 on the display panel 10 is C, and the maximum distance in the middle position is C1>C, which will affect the narrow frame setting of the final display device 1000. Therefore, in order to improve the poor light and shadow display without affecting the narrow frame setting, the connection starting line 16 also needs to be set as a circular arc line protruding towards the direction of the bending area BB1, and the orthographic projection of the first side surface 511 of the groove 51 of the back film layer 50 on the display panel 10 is parallel to the connection starting line 16. As shown in FIG. 25, the distance between each point on the connection starting line 16 and the corresponding point of the orthographic projection of the first side surface 511 of the groove 51 of the back film layer 50 on the display panel 10 is C, which realizes the improvement of the poor light and shadow display without affecting the narrow frame setting.

[0162] Exemplarily, the connection starting line 16 formed by the connection of the first ends 151 of the plurality of connection leads 15 of the display panel 10 is set as a circular arc line protruding towards the direction of the bending area BB1, therefore, the film layer structure of the film layer where the signal lines of the main area AA of the display panel 10 connected with the plurality of connection leads 15 needs to be changed, that is, the connection line formed by the connection of the connection ends of the signal lines connected with the first ends 151 of the plurality of connection leads 15 is also a circular arc line protruding towards the direction of the bending area BB1.

[0163] Exemplarily, the plurality of connection leads 15 are set on the second source-drain conductive layer SD2 in the present application.

[0164] Exemplarily, as shown in FIG. 13, the circuit layer 112 of the display panel 10 can include a plurality of conductive layers configured to form a plurality of pixel driving circuits and a plurality of signal lines for driving the pixel circuits. The plurality of conductive layers can include, for example, a gate conductive layer GT, a first source-drain conductive layer SD1 and a second source-drain conductive layer SD2 arranged in sequence in a direction perpendicular to and away from the substrate substrate 111. The gate conductive layer GT can include a first gate conductive layer GT1 and a second gate conductive layer GT2, which are not shown in the figure. The plurality of signal lines can be arranged on the first gate conductive layer GT1, the second gate conductive layer GT2 and the first source-drain conductive layer SD1. The plurality of connection leads 15 can be arranged on the second source-drain conductive layer SD2.

[0165] Exemplarily, as shown in FIG. 13, the circuit layer 112 further comprises an interlayer dielectric layer ILD between the gate conductive layer GT and the first source-drain conductive layer SD1, and a passivation layer PVX and a first planar layer PLN1 between the first source-drain conductive layer SD1 and the second source-drain conductive layer SD2. Of course, an insulating layer, for example, a second gate insulating layer GI2 is also provided between the first gate conductive layer GT1 and the second gate conductive layer GT2.

[0166] Exemplarily, the first end 151 of the plurality of connection leads 15 is connected to the signal line on the first source-drain conductive layer SD1 through a via hole penetrating through the passivation layer PVX, the first planar layer PLN1 between the second source-drain conductive layer SD2 and the first source-drain conductive layer SD1; the first end 151 of the plurality of connection leads 15 is connected to the signal line on the second gate conductive layer GT2 through a via hole penetrating through the passivation layer PVX, the first planar layer PLN1, the interlayer dielectric layer ILD between the second source-drain conductive layer SD2 and the second gate conductive layer GT2; and / or the first end 151 of the plurality of connection leads 15 is connected to the signal line on the first gate conductive layer GT1 through a via hole penetrating through the passivation layer PVX, the first planar layer PLN1, the interlayer dielectric layer ILD, the second gate insulating layer GI2 between the second source-drain conductive layer SD2 and the first gate conductive layer GT1.

[0167] Exemplarily, when the connection starting line 16 is a straight line, as shown in FIG. 21A, the connection line formed by the connection of the connection ends of the signal lines connected to the first end 151 of the plurality of connection leads 15 is also a straight line.

[0168] Exemplarily, when the connection starting line 16 is a circular arc line protruding towards the bending area BB1, as shown in FIG. 21B, the connection line formed by the connection of the connection ends of the signal lines connected to the first end 151 of the plurality of connection leads 15 is also a circular arc line protruding towards the bending area BB1.

[0169] In some embodiments, the boundary of the display panel 10 in the main body area AA is a circular arc, and the radius of the circular arc where the connection starting line 16 is located is greater than the radius of the circular arc where the display panel 10 in the main body area AA is located.

[0170] Exemplarily, the circular arc line of the connection starting line 16 can be determined in the following manner, as shown in FIG. 26:

[0171] 1. Select a center point E in the bending area BB1 of the display panel 10, and draw a normal line of the bending area BB1.

[0172] 2. According to the design space of the display panel 10, the end point F of the connection starting line 16 is confirmed, and the normal line of the F point is made according to the boundary of the display panel 10.

[0173] 3. The two normal lines intersect at the O point, which is the center of the auxiliary circle. The intersection E' of OE and the bending area BB1 of the display panel 10 close to the main area AA is taken, and OE' is the radius of the auxiliary circle, so as to determine the auxiliary circle pattern. The arc line between E' and F is the arc line of the connection starting line 16.

[0174] 4. After confirming the E'F arc shape, the actual display panel 10 design can be adjusted, for example, the pattern between E' and F is composed of an arc line + a straight line, or an arc line + an arc line, or a multi-segment line.

[0175] Embodiments of the present disclosure also provide another display module 100. The display module 100 includes a display panel 10, a polarizing sheet 20, a connecting layer 30, a cover plate 40, and a back film layer 50. The display panel 10 includes a main area AA and a binding bending area BB located on one side of the main area AA. The main area AA includes a display area AA1, and the display area AA1 includes a plurality of sub-pixels SP. The binding bending area BB includes a bending area BB1. The polarizing sheet 20 is arranged on the display side of the display panel 10, and the orthographic projection of the polarizing sheet 20 on the display panel 10 is located in the main area AA of the display panel 10. The connecting layer 30 is arranged on the side of the polarizing sheet 20 away from the display panel 10, and the orthographic projection of the connecting layer 30 on the display panel 10 is located in the main area AA of the display panel 10 and overlaps with the orthographic projection of the polarizing sheet 20 on the display panel 10. The cover plate 40 is arranged on the side of the connecting layer 30 away from the polarizing sheet 20, and the cover plate 40 is curvedly attached to the connecting layer 30. The back film layer 50 is arranged on the side of the display panel 10 away from the polarizing sheet 20, and the surface of the back film layer 50 away from the display panel 10 is provided with a groove 51 corresponding to the bending area BB1 of the display panel 10. The groove 51 includes a first side surface 511 and a second side surface 512, and the first side surface 511 is closer to the main area AA of the display panel 10 than the second side surface 512. The first side surface 511 is a circular arc surface protruding towards the second side surface 512.

[0176] Exemplarily, the first side surface 511 of the groove 51 of the back film layer 50 is arranged as a circular arc surface protruding towards the second side surface 512. This arrangement makes the connection between the circular arc-shaped first boundary 52 of the first portion 50A of the back film layer 50 and the straight line-shaped second boundary 53 have a circular arc chamfer 3, which connects the circular arc-shaped first boundary 52 of the first portion 50A of the back film layer 50 and the straight line-shaped second boundary 53 to form a boundary close to a circle. When the cover plate 40 is attached, the compression stress generated is uniformly released at the boundary close to a circle, the compression stress changes relatively uniformly, and the problem of hard angle bending due to stress concentration mutation is avoided, thereby avoiding the problem of separation and cracking of the film layer of the display panel 10 above, solving the problem of light and shadow disorder of the display module 100, and improving the display effect of the display module 100.

[0177] Embodiments of the present disclosure also provide a display device 1000. The display device 1000 includes the display module 100 and a circuit board 200. The display module 100 is the display module 100 provided in any of the above embodiments. The circuit board 200 is connected with the display module 100.

[0178] The display device 1000 can be any device that displays whether it is moving (e.g., video) or fixed (e.g., still image), and whether it is text or image. The display device 1000 includes, but is not limited to, a television, a mobile phone, a wearable device, a Personal Digital Assistant (PDA), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a video camera, a game console, a clock, a calculator, a television monitor, a flat panel display, a computer monitor, a vehicle display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rear view camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, a building structure, a packaging and aesthetic structure (e.g., a display of an image of a piece of jewelry), etc.

[0179] The display device 1000 described above has the same structure and beneficial technical effects as the display module 100 provided in some of the above embodiments, and thus will not be described here again.

[0180] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0181] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A display module, comprising: a display panel, comprising a main area and a binding bending area located at one side of the main area, the main area comprising a display area, the display area comprising a plurality of sub-pixels; a polarizer, disposed on the display side of the display panel, a normal projection of the polarizer on the display panel being located in the main area of the display panel; the polarizer comprising a first boundary and a second boundary, the second boundary being located between the first boundary and the binding bending area, and a connection between the first boundary and the second boundary being a circular arc chamfer; a connecting layer, disposed on a side of the polarizer away from the display panel, a normal projection of the connecting layer on the display panel being located in the main area of the display panel, and covering the normal projection of the polarizer on the display panel; a cover plate, disposed on a side of the connecting layer away from the polarizer; the cover plate is curvedly attached to the connecting layer.

2. The display module of claim 1, wherein, The normal projection of the connecting layer on the display panel coincides with the normal projection of the polarizer on the display panel.

3. The display module of claim 1 or 2, wherein, The distance from the boundary of the normal projection of the polarizer on the display panel to the boundary of the display panel is at least 0.05 mm.

4. The display module according to any one of claims 1 to 3, wherein, The first boundary of the polarizer is circular arc-shaped, the second boundary is straight line-shaped, the radius of the circular arc of the circular arc chamfer at the connection between the first boundary and the second boundary of the polarizer is greater than or equal to 1 mm, and less than or equal to the radius of the circular arc where the first boundary is located.

5. The display module according to any one of claims 1 to 4, wherein, The binding bending area of the display panel comprises a bending area; The display module further comprises: a back film layer, disposed on a side of the display panel away from the polarizer; a surface of the back film layer away from the display panel is provided with a groove, the groove is correspondingly provided in the bending area of the display panel; the groove comprises a first side and a second side, the first side is closer to the main area of the display panel than the second side, and the first side is a circular arc surface protruding towards the second side.

6. The display module of claim 5, wherein, The back film layer comprises a first part located on a side of the first side of the groove, the first part of the back film layer comprises a first boundary and a second boundary, the first side of the groove is the second boundary of the first part of the back film layer, the first boundary of the first part of the back film layer is circular arc-shaped, and a connection between the first boundary and the second boundary of the first part of the back film layer is a circular arc chamfer.

7. The display module of claim 5 or 6, wherein, The groove penetrates the back film layer in the thickness direction of the back film layer.

8. The display module of any of claims 5-7, wherein, The binding bending area of the display panel further comprises a binding area located on a side of the bending area away from the display area; The display panel comprises a plurality of connecting leads, the plurality of connecting leads are disposed in the bending area, and first ends of the plurality of connecting leads extend to the main area and are electrically connected with the plurality of sub-pixels, and second ends of the plurality of connecting leads extend to the binding area.

9. The display module of claim 8, wherein, The connection of the first end of the plurality of connection leads forms a connection starting line; the first side of the groove of the back film layer has a parallel relationship with the connection starting line in the orthographic projection on the display panel.

10. The display module of claim 9, wherein, The connection starting line is a circular arc line protruding towards the bending area.

11. The display module of claim 10, wherein, The first side of the groove of the back film layer has a parallel relationship with the connection starting line in the orthographic projection on the display panel.

12. The display module of claim 10 or 11, wherein, The boundary of the display panel in the main body area is a circular arc, and the radius of the circular arc where the connection starting line is located is greater than the radius of the circular arc where the boundary of the display panel in the main body area is located.

13. A preparation method of a display module, comprising: providing a polarizer; the polarizer comprises a first boundary and a second boundary, and the connection between the first boundary and the second boundary is a circular arc chamfer; a connection layer is arranged on one side of the polarizer, and the connection layer covers the polarizer; an initial display panel is formed on the side of the polarizer away from the connection layer, the initial display panel comprises a preset main body area and a preset binding bending area located on one side of the preset main body area, the preset main body area of the initial display panel comprises a display area, and the display area comprises a plurality of sub-pixels; the polarizer and the connection layer are located on the display side of the initial display panel, and the polarizer and the connection layer are located in the preset main body area of the initial display panel; the second boundary of the polarizer is located between the first boundary and the preset binding bending area; the initial display panel is cut to form a display panel; the preset main body area of the initial display panel is the main body area of the display panel, and the preset binding bending area of the initial display panel is the binding bending area of the display panel; a cover plate is formed; the cover plate is arranged on the side of the connection layer away from the polarizer; and the cover plate and the connection layer are curvedly attached.

14. The method of claim 13, wherein the display module is prepared by the steps of: The connection layer and the polarizer are integrally cut, and the connection layer and the polarizer completely overlap.

15. A display module, comprising: a display panel comprising a main body area and a binding bending area located on one side of the main body area, the main body area comprising a display area, and the display area comprising a plurality of sub-pixels; the binding bending area comprising a bending area; a polarizer arranged on the display side of the display panel, and the orthographic projection of the polarizer on the display panel being located in the main body area of the display panel; a connection layer arranged on the side of the polarizer away from the display panel, and the orthographic projection of the connection layer on the display panel being located in the main body area of the display panel and overlapping with the orthographic projection of the polarizer on the display panel; a cover plate arranged on the side of the connection layer away from the polarizer; and the cover plate and the connection layer being curvedly attached. A back film layer is arranged on a side of the display panel away from the polarizer; a surface of the back film layer away from the display panel is provided with a groove corresponding to the bending area arranged on the display panel, the groove comprises a first side and a second side, the first side is closer to the main body area of the display panel than the second side, and the first side is a circular arc surface protruding towards the second side.

16. A display device comprising: The display module according to any one of claims 1-12; Or, the display module according to claim 15; A circuit board connected with the display module.

Images