Display module and electronic device

Abstract

Embodiments of the present application provide a display module and an electronic device comprising the display module. The present application relates to the technical field of display. The electronic device can be thinned. The electronic device comprises a display module and a hinge mechanism, the hinge mechanism is arranged on the side of the display module away from the display surface; the hinge mechanism comprises a first door plate, a second door plate and a driving device, the driving device can drive the first door plate and the second door plate to move towards or away from each other, and drive the display module to switch between an unfolded state and a closed state; when the display module moves from the unfolded state to the closed state, the movement of the first door plate is rotation along a first axis, and the movement of the second door plate comprises movement and rotation along a second axis; the first axis and the second axis are both parallel to the bending line. By changing the movement track of the first door plate, the thickness of the whole machine in the folded state is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display module and an electronic device comprising the same. BACKGROUND

[0002] With the development of human-computer interaction technology, display has become an important element of human-computer interaction, and therefore, foldable electronic devices have emerged, such as foldable mobile phones.

[0003] With the improvement of user experience, the requirements for foldable electronic devices are becoming higher and higher. For example, the non-bending part has high rigidity, the bending part has good bendable performance, and the electronic device has a thin thickness.

[0004] When the electronic device is in a closed state, the thin thickness of the whole machine is a problem that users are concerned about. In some existing technologies, the thickness of the display module can be thinned, and the thickness of the shell can be thinned, but the degree of thinning is very small, so how to thin the thickness of the foldable electronic device in the closed state is still a problem. SUMMARY

[0005] The present application provides a display module and an electronic device, such as a foldable electronic device, comprising the same. The purpose is to thin the thickness of the foldable electronic device in the closed state.

[0006] To achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides an electronic device, which can be a foldable electronic device.

[0008] The electronic device comprises a display module and a hinge mechanism, the hinge mechanism is arranged on the side of the display module away from the display surface; the hinge mechanism comprises a first door plate, a second door plate and a driving device, the first door plate and the second door plate are connected with the driving device, the driving device can drive the first door plate and the second door plate to move towards or away from each other, so as to switch the display module between the flat state and the closed state; when the display module moves from the flat state to the closed state, the movement of the first door plate is a rotation along a first axis, and the movement of the second door plate comprises a movement and a rotation along a second axis; the first axis and the second axis are parallel to the bending line.

[0009] In the electronic device of the present application, the movement of the first door plate is a rotation, for example, when the display module is in the closed state, the first door plate can be perpendicular to the middle door plate, and the movement of the second door plate comprises a rotation and a movement, for example, when the display module is in the closed state, the second door plate can be inclined to the middle door plate. Compared with the first door plate and the second door plate both comprising a rotation and a movement, the thickness of the whole machine in the folded state can be reduced, and the thinning range is larger.

[0010] In an implementable manner, the second door plate has opposite first and second end portions; when the display module is in the unfolded state, the first and second door plates are located in the first plane, and the first end portion of the second door plate is closer to the first door plate than the second end portion; when the display module is in the closed state, the first door plate is perpendicular to the first plane, and the second end portion of the second door plate is closer to the first door plate than the first end portion.

[0011] In an implementable manner, the driving device includes first and second gear structures, the first gear structure meshes with the second gear structure; the first gear structure is connected with the first door plate, and the second gear structure is connected with the second door plate; the transmission ratio of the first gear structure to the second gear structure is less than 1.

[0012] The example of the present application uses a gear mesh transmission mechanism to realize the rotation of the first and second door plates, and the transmission ratio of the first gear structure to the second gear structure is less than 1, which can realize that the rotation speed of the first door plate is less than that of the second door plate, and in the same rotation time, the rotation angle of the first door plate is less than that of the second door plate, so that when the first door plate is perpendicular to the middle door plate, the second door plate is inclined relative to the middle door plate.

[0013] In an implementable manner, the first gear structure includes a first rocker arm and a first gear; one end of the first rocker arm is fixedly connected with the first gear, and the other end is fixedly connected with the first door plate; the second gear structure includes a second rocker arm, a second gear and a third gear; one end of the first rocker arm is fixedly connected with the second gear, and the other end is slidably connected with the second door plate; the second gear meshes with the third gear, and the third gear meshes with the first gear; the diameter of the first gear is greater than that of the second gear.

[0014] When the diameter of the first gear is greater than that of the second gear, the rotation speed of the first door plate can be made less than that of the second door plate.

[0015] In an implementable manner, the driving device further includes a sliding structure; the second door plate is slidably connected with the second rocker arm through the sliding structure; the sliding structure includes a sliding groove and a sliding rail arranged in the sliding groove, one of the sliding groove and the sliding rail is arranged on the second door plate, and the other is arranged on the second rocker arm.

[0016] The sliding structure can make the second door plate move while rotating.

[0017] In an implementable manner, the rotating shaft mechanism further includes a middle door plate, the first and second door plates are arranged opposite to each other on two sides of the middle door plate; when the display module is in the unfolded state, the first, middle and second door plates are located in the same plane; when the display module is in the closed state, the first door plate is perpendicular to the middle door plate.

[0018] In an implementable manner, the display module comprises a display screen, a support plate arranged on a side of the display screen away from the display surface; a first door plate and a second door plate are arranged on a side of the support plate away from the display screen; a first hollow structure is arranged in a region of the support plate opposite the second door plate.

[0019] In order to adapt to the rotation and movement of the second door plate, the first hollow structure is arranged in the region of the support plate opposite the second door plate, so as to ensure that the display module has high foldability.

[0020] In an implementable manner, the region of the support plate opposite the first door plate is not provided with a hollow structure.

[0021] In this implementation structure, since the movement of the first door plate is a rotating movement, the hollow structure can not be arranged at the position of the support plate corresponding to the first door plate.

[0022] In an implementable manner, the region of the support plate opposite the first door plate is provided with a second hollow structure; the density of the first hollow structure is greater than the density of the second hollow structure.

[0023] In other structures, the second hollow structure can also be arranged at the position of the support plate corresponding to the first door plate, and the density of the second hollow structure is less than the density of the first hollow structure, so that the second door plate has better foldability than the first door plate, realizing the composite movement of rotation and movement.

[0024] In an implementable manner, the rotating shaft mechanism further comprises an intermediate door plate, the first door plate and the second door plate are arranged opposite to each other on two sides of the intermediate door plate; a third hollow structure is arranged in a region of the support plate opposite the intermediate door plate; the density of the third hollow structure is greater than the density of the first hollow structure.

[0025] In an implementable manner, the first hollow structure comprises: a plurality of slots parallel to the second axis; the plurality of slots comprises a first group of slots and a second group of slots, the first group of slots and the second group of slots are arranged along a direction parallel to the second axis; the plurality of slots in the first group of slots and the plurality of slots in the second group of slots are alternately arranged along the direction of the second axis.

[0026] The plurality of slots are alternately arranged, which can further improve the foldability of the part of the display module corresponding to the second door plate.

[0027] In an implementable manner, the display module further comprises a cover plate arranged on one side of the display surface of the display screen, the cover plate comprises a first non-bending area, a second non-bending area, a third non-bending area, a first bending area and a second bending area, the first bending area connects the first non-bending area and the second non-bending area, the second bending area connects the second non-bending area and the third non-bending area, the first bending area and the second bending area are capable of being bent along the bending line to switch between the flat state and the closed state; the position of the rotating shaft mechanism corresponds to the first bending area; the thickness of the first non-bending area is not equal to the thickness of the second non-bending area.

[0028] Since the thickness of the first non-bending area is not equal to the thickness of the second non-bending area in the cover plate, that is, the cover plate is designed as a non-uniform thickness structure. For example, in some scenarios, in order to improve the rigidity of the first non-bending area exposed (which can present a picture to the user) in the closed state, the thickness of the first non-bending area is increased, and through the non-uniform thickness design of the cover plate, the bendable performance of the first bending area will not be affected by the increase in the thickness of the first non-bending area.

[0029] The display module provided in the present application not only has high rigidity in the non-bending area, but also has excellent bendable performance in the bending area.

[0030] In an implementable manner, the thickness of the first non-bending area is greater than the thickness of the second non-bending area.

[0031] So that in the cover plate, the thickness of the first non-bending area corresponding to the first non-bending part is greater than the thickness of the second non-bending area corresponding to the second non-bending part. That is, in the cover plate structure, the first non-bending area is a thick area, the second non-bending area is a thin area, and the first bending area connected between the first non-bending area and the second non-bending area is a thin-thick transition area.

[0032] In an implementable manner, the cover plate comprises a substrate and a first buffer layer, the first buffer layer is closer to the display screen than the substrate; the thickness of the substrate located in the first non-bending area is greater than the thickness of the substrate located in the second non-bending area, and / or; the thickness of the first buffer layer located in the first non-bending area is greater than the thickness of the first buffer layer located in the second non-bending area.

[0033] In some implementation structures, at least one of the substrate or the buffer layer in the cover plate can be designed as a non-uniform thickness structure.

[0034] In an implementable manner, the thickness of the first buffer layer located in the first bending area gradually decreases from the first non-bending area to the second non-bending area.

[0035] In an implementable manner, the cover plate comprises a second buffer layer, the second buffer layer comprises a first part and a second part; the first part of the second buffer layer is located in the first non-bending area, and the second part of the second buffer layer is located in the first bending area; the elastic modulus of the first part of the second buffer layer is greater than the elastic modulus of the second part of the second buffer layer.

[0036] In order to further improve the bendable performance of the bending area, the second buffer layer can be designed to have an unequal elastic modulus structure.

[0037] In a second aspect, the application provides a hinge mechanism, which is used in a foldable electronic device, and is arranged on a side of a display module of the electronic device away from a display surface. The hinge mechanism comprises a first door plate, a second door plate and a driving device. The first door plate and the second door plate are connected with the driving device. The driving device can drive the first door plate and the second door plate to move towards or away from each other, so that the display module switches between an unfolded state and a closed state along a bending line. When the display module moves from the unfolded state to the closed state, the movement of the first door plate is rotation along a first axis, and the movement of the second door plate comprises movement and rotation along a second axis. The first axis and the second axis are parallel to the bending line.

[0038] In the hinge mechanism of the application, the movement of the first door plate is rotation, for example, when the display module is in the closed state, the first door plate can be perpendicular to the intermediate door plate, and the movement of the second door plate comprises rotation and movement, for example, when the display module is in the closed state, the second door plate can be inclined relative to the intermediate door plate. Compared with the first door plate and the second door plate both comprising rotation and movement, the overall thickness of the electronic device in the folded state can be reduced.

[0039] In an implementable manner, the second door plate has opposite first and second end portions; when the display module is in the unfolded state, the first door plate and the second door plate are located in a first plane, and the first end portion of the second door plate is closer to the first door plate than the second end portion; when the display module is in the closed state, the first door plate is perpendicular to the first plane, and the second end portion of the second door plate is closer to the first door plate than the first end portion.

[0040] In an implementable manner, the driving device comprises first and second gear structures, the first gear structure is engaged with the second gear structure; the first gear structure is connected with the first door plate, and the second gear structure is connected with the second door plate; the transmission ratio of the first gear structure to the second gear structure is less than 1.

[0041] In the example of the application, the rotation of the first door plate and the second door plate is realized by using a gear engagement transmission mechanism, and the transmission ratio of the first gear structure to the second gear structure is less than 1, so that the rotation speed of the first door plate is less than the rotation speed of the second door plate.

[0042] In an implementable manner, the first gear structure comprises: a first rocker arm and a first gear; one end of the first rocker arm is fixedly connected with the first gear, and the other end is fixedly connected with the first door plate; the second gear structure comprises: a second rocker arm, a second gear and a third gear; one end of the first rocker arm is fixedly connected with the second gear, and the other end is slidably connected with the second door plate; the second gear is engaged with the third gear, and the third gear is engaged with the first gear; the diameter of the first gear is greater than the diameter of the second gear.

[0043] When the diameter of the first gear is greater than the diameter of the second gear, the rotation speed of the first door plate can be made less than the rotation speed of the second door plate.

[0044] In an implementable manner, the driving device further comprises a sliding structure; the second door plate is slidably connected with the second rocker arm through the sliding structure; the sliding structure comprises a sliding groove and a sliding rail arranged in the sliding groove, one of the sliding groove and the sliding rail is arranged on the second door plate, and the other is arranged on the second rocker arm.

[0045] The sliding structure can make the second door plate move while rotating.

[0046] In an implementable manner, the rotating shaft mechanism further comprises an intermediate door plate, the first door plate and the second door plate are oppositely arranged on two sides of the intermediate door plate; the display module is in a flat state, and the first door plate, the intermediate door plate and the second door plate are located in the same plane.

[0047] In a third aspect, the present application provides a display module, which comprises a display screen, the display screen comprising a display area, an edge bending area located at the outer edge of the display area, and a lower bezel area connected with the edge bending area, the lower bezel area being located on the side of the display area away from the display surface; the display module further comprises a base film and an adhesive layer, the base film and the adhesive layer being arranged on the outside of the edge bending area, the base film being connected with the edge bending area through the adhesive layer, or; the display module further comprises a reinforcing layer, the reinforcing layer being arranged on the outside of the edge bending area, the reinforcing layer comprising a printed layer prepared by printing; the outside of the edge bending area is the side of the edge bending area away from the center of the arc structure.

[0048] In the display module, the reinforcing layer arranged on the side of the edge bending area of the display screen comprises a base film, and the base film is adhered to the edge bending area through an adhesive layer, that is, the present application adopts a lamination process, which can easily control the thickness size of the adhesive layer compared with a dispensing coating process, and can realize a narrow bezel. Alternatively, the reinforcing layer is prepared by printing technology, such as inkjet printing technology, which can prepare a reinforcing layer with a thinner thickness to compress the bezel size and realize a narrow bezel.

[0049] In an implementable manner, the thickness of the reinforcing layer is 1-30 um.

[0050] In an implementable manner, the display module further comprises a reinforcing layer, the reinforcing layer is arranged at the inner side of the edge bending area; the inner side of the edge bending area is the side of the edge bending area close to the center of the arc-shaped structure.

[0051] The combination of the reinforcing layer and the reinforcing layer can further improve the strength of the edge bending area.

[0052] In an implementable manner, when the display module comprises the base film and the adhesive layer, the elastic modulus of the reinforcing layer is less than the elastic modulus of the base film; when the display module comprises the reinforcing layer, the elastic modulus of the reinforcing layer is less than the elastic modulus of the reinforcing layer.

[0053] The influence of the reinforcing layer on the bendability of the edge bending area can be avoided.

[0054] In an implementable manner, the material of the reinforcing layer comprises at least one of polyurethane, acrylate, silicone or epoxy resin.

[0055] In an implementable manner, the display module further comprises a buffer layer, the buffer layer is arranged at the side of the base film away from the edge bending area, the elastic modulus of the buffer layer is less than the elastic modulus of the base film, or; the buffer layer is arranged at the side of the reinforcing layer away from the edge bending area, the elastic modulus of the buffer layer is less than the elastic modulus of the reinforcing layer.

[0056] The buffer layer with a smaller elastic modulus can also guarantee the bendability of the edge bending area.

[0057] In an implementable manner, the material of the buffer layer comprises at least one of polyurethane, acrylate or silicone.

[0058] In a fourth aspect, the present application provides an electronic device, comprising a display module and a shell, the shell comprises a frame arranged at the edge of the display module, the frame is provided with a first filling layer at the position of the display surface of the display module; the frame and the first filling layer are an integrally formed structure.

[0059] In the electronic device provided by the present application, the first filling layer used to fill between the frame and the display module is an integrally formed structure with the frame, and in the assembly process, compared with separately assembling the first filling layer, there is no fit tolerance between the frame and the first filling layer, and in the design, no fit tolerance needs to be reserved, so that the size of the frame can be compressed to realize the thinness of the electronic device.

[0060] In an implementable manner, the frame and the first filling layer are an integrally formed injection molding structure.

[0061] For example, the integrally formed frame and the first filling layer can be obtained by using an injection molding process.

[0062] In an implementable manner, the second filling layer is arranged at a position opposite to the side of the display module of the frame, and the elastic modulus of the second filling layer is less than the elastic modulus of the frame.

[0063] When the electronic device is in use, the display module also needs to consider the amount of jumping, and therefore, there is a clearance between the side of the display module and the frame. In the example of the present application, the second filling layer with a smaller elastic modulus is arranged at a position opposite to the side of the display module of the frame. In this way, the second filling layer plays a buffering role, so that the clearance size between the display module and the frame can be compressed, thereby compressing the overall size.

[0064] In an implementable manner, the second filling layer and the frame are integrally formed. The assembly process can be simplified.

[0065] In an implementable manner, the frame and the second filling layer are integrally formed injection molded structural members.

[0066] In a fifth aspect, the present application provides a display module, which comprises a display screen, a support plate and an electromagnetic induction structure. The electromagnetic induction structure is arranged on the support plate, the support plate carrying the electromagnetic induction structure is arranged on the back side of the display screen, and the electromagnetic induction structure is closer to the display screen than the support plate. The electromagnetic induction structure comprises: a first induction electrode layer and a second induction electrode layer stacked together, and a first insulating layer stacked between the first induction electrode layer and the second induction electrode layer, the stacking direction of the first induction electrode layer and the second induction electrode layer being consistent with the stacking direction of the display screen and a display cover plate.

[0067] In the display module related to the present application, the electromagnetic induction structure is directly formed on the support plate. Compared with the example in which the electromagnetic induction structure is bonded to the support plate by using an adhesive layer, the adhesive layer can be omitted, the thickness of the display module is thinned, and the bendability of the display module is improved. In addition, since the electromagnetic induction structure is directly formed on the support plate, the thickness of the electromagnetic induction structure can be compressed from 80 to 107 microns to about 5 microns. In this way, the thickness of the entire display module is obviously compressed, and the bendability of the display module is improved.

[0068] In an implementable manner, the support plate is made of an insulating material; the first induction electrode layer is arranged on the surface of the support plate; the electromagnetic induction structure further comprises a flat layer, the flat layer is arranged on the side of the second induction electrode layer away from the first insulating layer and covers the second induction electrode layer; and the flat layer is arranged on the back side of the display screen through an adhesive layer.

[0069] When the support plate is made of an insulating material, the first induction electrode layer is directly stacked on the support plate.

[0070] In an implementable manner, the support plate is made of a conductive material; the electromagnetic induction structure further comprises a second insulating layer and a flat layer; the second insulating layer is arranged on the surface of the support plate, and the first induction electrode layer is arranged on the side of the second insulating layer away from the support plate; the flat layer is arranged on the side of the second induction electrode layer away from the insulating layer and covers the second induction electrode layer; and the flat layer is arranged on the back side of the display screen through the adhesive layer.

[0071] In this embodiment, since the support plate is made of a conductive material, in order to avoid the influence of the support plate on the induction electrode, the insulating layer is arranged between the support plate and the first induction electrode layer.

[0072] In an implementable manner, the display module further comprises a back protective layer arranged on the back side of the display screen; and the flat layer is connected with the back protective layer through the adhesive layer.

[0073] In a sixth aspect, the present application provides a display module, which comprises a display screen, an electromagnetic induction structure and a support plate, the electromagnetic induction structure is arranged on the back side of the display screen, and the support plate is arranged on the side of the electromagnetic induction structure away from the display screen, wherein the electromagnetic induction structure comprises a substrate, a first induction electrode layer, a second induction electrode layer, a first flat layer and a second flat layer, the first induction electrode layer is arranged on one side of the substrate, the second induction electrode layer is arranged on the other side of the substrate, the first flat layer covers the first induction electrode layer, the first flat layer is arranged on one side of the support plate through a first adhesive layer, the second flat layer covers the second induction electrode layer, and the second flat layer is connected with the back of the display screen through a second adhesive layer.

[0074] In the display module provided by the present application, the electromagnetic induction structure is arranged on the back side of the display screen, and the electromagnetic induction structure comprises a substrate and induction electrode layers arranged on opposite sides of the substrate. Compared with the existing display module comprising a back protective layer arranged on the back side of the display screen, the present application can omit the back protective layer to reduce the thickness of the entire display module and improve the bendable performance of the display module.

[0075] In an implementable manner, the material of the substrate comprises at least one of polyethylene terephthalate (PET), polyimide (PI) and transparent polyimide (CPI).

[0076] In a seventh aspect, the present application further provides an electronic device comprising a shell and the display module in any of the above-mentioned implementation manners, and the display module is arranged on the shell.

[0077] The electronic device provided by the present application comprises the display module, so the electronic device provided by the present application and the display module of the above-mentioned technical solution can solve the same technical problems and achieve the same expected effect. BRIEF DESCRIPTION OF DRAWINGS

[0078] FIG. 1 is a structural diagram of a folded electronic device;

[0079] FIG. 2 is a structural diagram of another folded electronic device;

[0080] FIG. 3 is a structural diagram of a display module;

[0081] FIG. 4A is a schematic diagram of a remote trajectory of a door plate in a hinge mechanism provided by an embodiment of the present application;

[0082] FIG. 4B is a schematic diagram of a structure when the door plate in a hinge mechanism provided by an embodiment of the present application is unfolded;

[0083] FIG. 5 is a schematic diagram of a remote trajectory of a door plate in a hinge mechanism;

[0084] FIG. 6A and FIG. 6B is a structural diagram of a driving device provided by an embodiment of the present application;

[0085] FIG. 7 is a structural diagram of a connection relationship between a second door plate and a second rocker arm provided by an embodiment of the present application;

[0086] FIG. 8 is a structural diagram of a support plate provided by an embodiment of the present application;

[0087] FIG. 9 is a structural diagram of a hollow structure in a support plate provided by an embodiment of the present application;

[0088] FIG. 10 is a structural diagram of a support plate provided by an embodiment of the present application;

[0089] FIG. 11 is a structural diagram of a support plate provided by an embodiment of the present application;

[0090] FIG. 12 is a structural diagram of a display screen when unfolded in a display module;

[0091] FIG. 13 is a structural diagram of a display screen when folded in a display module;

[0092] FIG. 14 is a structural diagram of a display screen when folded in a display module;

[0093] FIG. 15 is a structural diagram of a display screen and an enhancement layer in a display module provided by an embodiment of the present application;

[0094] FIG. 16 A structure diagram of an enhancement layer provided for an embodiment of the present application;

[0095] FIG. 17 A structure diagram of a display module provided for an embodiment of the present application;

[0096] FIG. 18 A structure diagram of a display screen and an enhancement layer in a display module provided for an embodiment of the present application;

[0097] FIG. 19 A structure diagram of a display module provided for an embodiment of the present application;

[0098] FIG. 20 A structure diagram of a display module provided for an embodiment of the present application;

[0099] FIG. 21 A structure diagram of a display module provided for an embodiment of the present application;

[0100] FIG. 22 A structure diagram of a display module provided for an embodiment of the present application;

[0101] FIG. 23 A structure diagram of a display module provided for an embodiment of the present application;

[0102] FIG. 24 A connection relationship schematic diagram of a display module and a shell;

[0103] FIG. 25 A connection relationship schematic diagram of a display module and a shell provided for an embodiment of the present application;

[0104] FIG. 26 A connection relationship schematic diagram of a display module and a shell provided for an embodiment of the present application;

[0105] FIG. 27 A structure diagram of a shell provided for an embodiment of the present application;

[0106] FIG. 28 A structure diagram of a display module containing an electromagnetic induction structure;

[0107] FIG. 29 A structure diagram of a display module containing an electromagnetic induction structure provided for an embodiment of the present application;

[0108] FIG. 30 A structure diagram of an electromagnetic induction structure provided for an embodiment of the present application;

[0109] FIG. 31 A structure diagram of an electromagnetic induction structure provided for an embodiment of the present application;

[0110] FIG. 32 A structural diagram of a display module comprising an electromagnetic induction structure provided for an embodiment of the present application;

[0111] FIG. 33 A structural diagram of an electromagnetic induction structure provided for an embodiment of the present application;

[0112] FIG. 34 A structural diagram of an induction electrode of an electromagnetic induction structure provided for an embodiment of the present application;

[0113] FIG. 35 A structural diagram of an induction electrode of an electromagnetic induction structure provided for an embodiment of the present application;

[0114] FIG. 36 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0115] FIG. 37 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0116] FIG. 38 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0117] FIG. 39 A structural diagram of a multi-folded display module in a folded state provided for an embodiment of the present application;

[0118] FIG. 40 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0119] FIG. 41 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0120] FIG. 42 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0121] FIG. 43 A structural diagram of a multi-folded display module provided for an embodiment of the present application;

[0122] FIG. 44 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0123] FIG. 45 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0124] FIG. 46 A structural diagram of a multi-folded display module in a flattened state provided for an embodiment of the present application;

[0125] FIG. 47 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0126] FIG. 48 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0127] FIG. 49 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0128] FIG. 50 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0129] FIG. 51 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0130] FIG. 52 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0131] FIG. 53 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0132] FIG. 54 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0133] FIG. 55 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0134] FIG. 56 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0135] FIG. 57 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application.

[0136] FIG. 58 A structure diagram of a multi-fold display module in which a cover plate is in a flat state is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0137] The specific embodiments involved in the present application will be described in detail below with reference to the accompanying drawings.

[0138] An electronic device is provided in an embodiment of the present application, which can be a foldable electronic device.

[0139] The electronic device can include a mobile phone, a pad, a smart wearable product (for example, a smart watch, a smart bracelet), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and the like, which are electronic products with display functions. The embodiments of the present application do not specially limit the specific form of the above-mentioned electronic device with display function.

[0140] The structure of the electronic device is described below for the convenience of description, taking a mobile phone as an example.

[0141] FIG. 1 A structure diagram of a folding screen mobile phone is shown, and the example folding screen mobile phone is a three-screen folding mobile phone. The three folding screen mobile phone can include a first housing 100a, a second housing 100b and a third housing 100c, and a display module 11. The display module 11 can be continuously covered on the first housing 100a, the second housing 100b and the third housing 100c. The folding screen mobile phone can also include a first hinge mechanism and a second hinge mechanism.

[0142] The first housing 100a and the second housing 100b are arranged on both sides of the first hinge mechanism and are connected with the first hinge mechanism, and the first hinge mechanism can move to fold or unfold the first housing 100a and the second housing 100b, to realize the flatness and closure of the display module 11 arranged on the first housing 100a and the second housing 100b.

[0143] The second housing 100b and the third housing 100c are arranged on both sides of the second hinge mechanism and are connected with the second hinge mechanism, and the second hinge mechanism can move to fold or unfold the second housing 100b and the third housing 100c, to realize the flatness and closure of the display module 11 arranged on the second housing 100b and the third housing 100c.

[0144] FIG. 2 A structure diagram of a double-screen folding mobile phone is shown, which includes a first housing 100a, a second housing 100b, a display module 11 and a hinge mechanism. The display module 11 can be continuously covered on the first housing 100a and the second housing 100b, and the first housing 100a and the second housing 100b are arranged on both sides of the hinge mechanism and are connected with the hinge mechanism. The display module 11 can also realize flatness and closure under the action of the hinge mechanism.

[0145] The foldable electronic device can be unfolded to a flat state, folded to a closed state, and also can be in an intermediate state between the flat state and the closed state. The foldable electronic device has at least two states, i.e., the flat state and the closed state. In some cases, a third state, i.e., the intermediate state between the flat state and the closed state, can be further included. The intermediate state is not only a unique state, but also can be any one or more states between the flat state and the closed state.

[0146] The above FIG. 1 and FIG. 2 An example is a three-screen and double-screen foldable electronic device. The foldable electronic device involved in the embodiments of the present application can also be a more-screen device, such as a four-screen foldable, a five-screen foldable, and the like.

[0147] In the electronic device, the demand for thinning the electronic device is increasingly obvious, and the following describes various structures that can be implemented, such as compressing the size of the frame, thinning the size of the display module, and the like, to make the entire machine light and thin. Specific embodiments are described below.

[0148] In some examples, as FIG. 3 , the display module 11 can include a bracket 111, a display panel 112, and a cover plate 110.

[0149] The bracket 111 and the cover plate 110 are arranged on opposite sides of the display panel 112. The bracket 111 is arranged on the back side of the display panel 112 and serves as a support structure for supporting the display panel 112. The cover plate 110 is arranged on the display side of the display panel 112 and serves to protect the display panel 112 and reduce the probability of damage to the display panel 112.

[0150] Continuing to refer to FIG. 3 , the cover plate 110 can include a display cover plate 113 and a protective layer 114. The display cover plate 113 is arranged on the display side of the display panel 112, and the protective layer 114 is arranged on the side of the display cover plate 113 away from the display panel 112. Both the display cover plate 113 and the protective layer 114 are light-transmissive. Light transmitted by the display side of the display panel 112 can pass through the display cover plate 113 and the protective layer 114 and be received by a user.

[0151] In some use scenarios, when the protective layer 114 is damaged or falls off, for example, the display cover plate 113 can still protect the display panel 112.

[0152] In the embodiments of the present application, the display panel 112 can be a flexible display panel, and the cover plate 110 can be a flexible structure to meet the folding requirement.

[0153] In the aforementioned foldable electronic devices such as mobile phones, the display screen 112 can be used to display information and provide an interactive interface for the user. In various embodiments of this application, the display screen 112 may be, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MLED) display screen, a micro organic light-emitting diode (MOLED) display screen, a quantum dot light-emitting diode (QLED) display screen, etc.

[0154] The display surface of the display screen 112 in this application embodiment is the side of the display screen 112 used to display images to the user, while the back side of the display screen 112 refers to the side opposite to the display surface of the display screen 112.

[0155] FIG. 3 The image shows that in order to enhance the protection and support strength of the display screen 112, a support plate 111 is provided on one side of the back of the display screen 112. The display screen 112 is to be placed in a folded electronic device. Correspondingly, the support plate 111 also includes a bending area and a non-bending area connected to the bending area.

[0156] like FIG. 4A A pivot mechanism is provided on the side of the support plate 111 away from the display screen 112. The pivot mechanism enables the display module containing the display screen 112 and the support plate 111 to be flattened and closed.

[0157] FIG. 4A The positional relationship between the various door panels of the pivot mechanism and the support plate 111 is shown. In some examples, the pivot mechanism includes a first door panel 202 and a second door panel 203, and the module 11 is shown disposed on one side of the first door panel 202 and the second door panel 203.

[0158] In other examples, such as FIG. 4A The pivot mechanism may also include a middle door panel 201. The first door panel 202 and the second door panel 203 are arranged on opposite sides of the middle door panel 201, and the first door panel 202, the middle door panel 201 and the second door panel 203 support the display module 11.

[0159] To ensure that the overall thickness of the electronic device is small when it is folded.

[0160] In the example provided in this application, the motion trajectories of the first door plate 202 and the second door plate 203 in the rotating shaft mechanism can be... FIG. 4A and FIG. 4B The displayed trajectory path can compress the overall thickness of the device in its folded state.

[0161] exist FIG. 4A and FIG. 4B In the process, the first door panel 202 rotates along the first axis. When the display module is in the closed state, the first door panel 202 moves as follows: FIG. 4A The plane shown is perpendicular to the first plane. This first plane can be the plane where the first door panel 202 and the second door panel 203 are located when the display module is unfolded.

[0162] like FIG. 4A and FIG. 4B The movement of the second door panel 203 includes rotation and movement. For example, in FIG. 4B In the middle, the second door panel 203 can rotate along the second axis, which is parallel to the first axis and parallel to the bending line of the display module.

[0163] In some examples, the second door panel 203 can move in a direction parallel to its own surface.

[0164] In some examples given in this application, when the display module is in a flattened state, the first door panel 202 and the second door panel 203 can be completely in the same plane. In other examples, when the display module is in a flattened state, the first door panel 202 and the second door panel 203 may have a relatively small included angle, such as an angle less than or equal to 2°, which can be regarded as the first door panel and the second door panel being in the same plane.

[0165] like FIG. 4A The second door panel 203 has a first end and a second end opposite to each other. In the flattened state, the first end is closer to the first door panel 202 than the second end. When the display module is in... FIG. 4A In the closed state shown (as indicated by the dashed line), the second end is closer to the first door panel 202 than the first end, and the distance between the first end and the first door panel 202 is greater than the distance between the second end and the first door panel 202.

[0166] When the first door panel 202 and the second door panel 203 are in accordance with FIG. 4A and FIG. 4B When the movement shown is in the indicated motion mode, and the display module is in the closed state, it will display... FIG. 4AThe shape can be: the movement trajectory of the part of the display module opposite to the first door plate 202 is a bat trajectory, and the movement trajectory of the part of the display module opposite to the second door plate 203 is a water drop trajectory.

[0167] In some examples, as FIG. 5 shown, the movement trajectories of the first door plate 202 and the second door plate 203 are basically similar, including rotation around the axis of rotation, and also including movement. As FIG. 5 shown, the display module including the support plate 111 and the display screen 112 can form a water drop shape close to symmetry in the bending area.

[0168] In combination with the FIG. 4A and FIG. 4B shown in the embodiments of the present application, and FIG. 5 in contrast, because FIG. 4A and FIG. 4B the embodiments of the present application change the movement mode of the first door plate 202, on the basis of realizing the bending of the display module, the thickness dimension of the whole machine in the folded state is reduced.

[0169] In the examples of the present application, the first door plate 202 and the second door plate 203 are driven by the driving device to move towards or away from each other, so that the display module is switched between the unfolded state and the closed state.

[0170] The present application gives a driving device that can be implemented, which can realize FIG. 4A shown, in the closed state, the first door plate 202 is perpendicular to the first plane, and the second door plate 203 is inclined relative to the first plane.

[0171] As FIG. 6A and FIG. 6B shown, FIG. 6A and FIG. 6B are simple structure diagrams of the driving device given by the embodiments of the present application, in FIG. 6A the pivot mechanism of the example, including the first door plate 202 and the second door plate 203. In FIG. 6B the pivot mechanism of the example, including the first door plate 202, the intermediate door plate 201 and the second door plate 203.

[0172] FIG. 6A and FIG. 6B The driving device shown includes: a first gear structure 30 and a second gear structure 40, the first gear structure 30 is engaged with the second gear structure 40; the first gear structure 30 is connected with the first door plate 202, and the second gear structure 40 is connected with the second door plate 203. The transmission ratio n of the first gear structure and the second gear structure is less than 1.

[0173] The transmission ratio n of the first gear structure and the second gear structure is less than 1, and the rotation angle of the first door plate 202 is less than the rotation angle of the second door plate 203 at the same rotation time, so that the first door plate 202 can be realized as FIG. 4A The second door plate 203 is inclined to the first plane when the first door plate 202 is perpendicular to the first plane as shown. For example, the transmission ratio n can be 0.5 to 0.8, and the transmission ratio n is equal to 0.6 in an example.

[0174] In some examples, as shown in FIG. 6A and FIG. 6B The first gear structure 30 includes a first rocker arm 301 and a first gear 302, one end of the first rocker arm 301 is fixedly connected with the first gear 302, and the other end is fixedly connected with the first door plate 202.

[0175] In some structures, the first rocker arm 301 and the first gear 302 can be an integral structure.

[0176] The first gear 302 can be a complete circular gear structure, and the circumferential surface of the circular structure is provided with meshing teeth; or, as shown in FIG. 6A and FIG. 6B The outer wall surface is provided with meshing teeth to meet the rotation requirement.

[0177] In some examples, the second gear structure 40 includes a second rocker arm 401, a second gear 402 and a third gear 403; one end of the second rocker arm 401 is fixedly connected with the second gear 402, and the other end is slidingly connected with the second door plate 203; the second gear 402 is engaged with the third gear 403, and the third gear 403 is engaged with the first gear 302.

[0178] In some structures, the second rocker arm 401 and the second gear 402 can be an integral structure.

[0179] The second gear 402 can also be a complete circular gear structure; or, as shown in FIG. 6A The outer wall surface is provided with meshing teeth to meet the rotation requirement.

[0180] The diameter of the first gear 302 is greater than the diameter of the second gear 402. In some examples of the present application, the diameter of the first gear 302 or the second gear 402 can be the diameter of the reference circle of the gear.

[0181] Because the diameter of the first gear 302 is greater than the diameter of the second gear 402, according to the inverse ratio relationship between the transmission ratio and the diameter of the reference circle, and the proportional relationship between the transmission ratio and the rotation speed, it can be determined that the rotation angle of the first door plate 202 is less than the rotation angle of the second door plate 203 at the same rotation time, so that the first door plate 202 can be realized as FIG. 4AThe second door plate 203 is inclined to the first plane when viewed perpendicularly to the first plane.

[0182] As FIG. 6B the intermediate door plate 201 can be stationary during the movement of the first door plate 202 and the second door plate 203 by the driving device, and when the display module is in the closed state, the bent part of the display module is arranged in the space surrounded by the first door plate 202, the intermediate door plate 201 and the second door plate 203.

[0183] As FIG. 6B in some other examples, the intermediate door plate 201 can move away from the display module to provide more accommodation space for the bent display module during the movement of the first door plate 202 and the second door plate 203 by the driving device. The device for moving the intermediate door plate 201 away from the display module can be a telescopic device, such as a telescopic spring, a telescopic cylinder, etc.

[0184] In the examples of the present application, the second door plate 203 can rotate and slide. As FIG. 7 , FIG. 7 is a sliding structure provided by the present application, the second door plate 203 is slidingly connected with the second rocker arm 401 through the sliding structure, the sliding structure includes a sliding groove 501 and a sliding rail 502, one of the sliding groove 501 and the sliding rail 502 is arranged on the second door plate 203, and the other is arranged on the second rocker arm 401, for example, in FIG. 7 , the sliding groove 501 is arranged on the second door plate 203, and the sliding rail 502 is arranged on the second rocker arm 401.

[0185] In the examples of the present application, in order to adapt FIG. 4A and FIG. 4B the trajectory shape of the first door plate 202 and the second door plate 203 shown, FIG. 8 is a partial structure diagram of a support plate 111 provided by the examples of the present application. The support plate 111 is provided with a hollow structure 111A at the position opposite to the intermediate door plate 201 (bent inner R area), and is provided with a hollow structure 111B at the position opposite to the second door plate 203 (first bent outer R area).

[0186] In some examples of the present application, the position of the support plate 111 opposite to the intermediate door plate 201 can be: the area where the orthographic projection of the intermediate door plate 201 on the support plate 111 is located when the display module is in the flat state, or can include the area where the orthographic projection is located and some areas outside the area.

[0187] Referring to FIG. 8 , the position of the support plate 111 opposite to the first door plate 202 can not be provided with a hollow structure. The support plate 111 of this structure is applied to FIG. 4AAnd FIG. 4B In the structure shown, the first door plate 202 is in rotational motion, the second door plate 203 includes a composite motion of rotation and movement, and the display module containing the support plate 111 can match the motion trajectory, presenting FIG. 4A The shape shown.

[0188] As FIG. 8 The structure of the support plate 111 shown not only guarantees the bendable performance of the inner R-bending area, the first outer R-bending area, and the second outer R-bending area, but also makes the second outer R-bending area have sufficient flatness stiffness.

[0189] The structure of the hollow structure 111B has multiple. FIG. 9 An exemplary structure of the hollow structure 111B is given, which includes a plurality of slots, and the extension direction of each slot is parallel to the bending line L (the bending line L is parallel to the first axis and the second axis mentioned above). The plurality of slots can be divided into a first group of slots and a second group of slots adjacent to the first group of slots, the first group of slots and the second group of slots are arranged along a direction perpendicular to the bending line L, and the first group of slots and the second group of slots each contain a plurality of slots, the plurality of slots in the first group of slots and the plurality of slots in the second group of slots are arranged alternately. So that the outer R-bending area not only has sufficient bending performance, but also guarantees its flatness stiffness.

[0190] As FIG. 8 shown, the density of the hollow structure 111A of the inner R-bending area is greater than the density of the hollow structure 111B of the second outer R-bending area.

[0191] In some embodiments of the present application, the density of the hollow structure can be the area ratio of the hollow structure occupying the unit area of the support plate 111. For example, the hollow structure includes a plurality of slots, and the distance between two adjacent slots in the inner R-bending area is less than the distance between two adjacent slots in the second outer R-bending area.

[0192] FIG. 10 The cross-sectional view is shown. FIG. 8 The hollow structure 111A located in the inner R-bending area penetrates the support plate 111, and the hollow structure 111B located in the second outer R-bending area does not penetrate the support plate 111. For example, in FIG. 10 , the support plate 111 has a first surface and a second surface, the hollow structure 111A penetrates from the first surface to the second surface, the hollow structure 111B is recessed from the first surface to the second surface, and the bottom surface of the hollow structure 111B has a distance from the second surface.

[0193] In some examples, in order to improve the bendable performance of the second outer R-bending area, the first surface is closer to FIG. 4A the center of the arc structure shown.

[0194] In order to adapt FIG. 4A the motion trajectory of the first door plate 202 and the second door plate 203, FIG. 11 is another structure of the support plate 111 given in the present application. The hollow structure 111A is arranged in the inner R area of the bending, the hollow structure 111B is arranged in the outer R area of the second bending, and the hollow structure 111C is arranged in the outer R area of the first bending opposite to the first door plate 202; the density of the hollow structure 111C is less than the density of the hollow structure 111B, and the hollow structure 111C and the hollow structure 111B are asymmetrically arranged on both sides of the hollow structure 111A.

[0195] In some embodiments of the present application, the density of the hollow structure can be: the area ratio of the hollow structure in the unit area of the support plate 111. For example, the hollow structure includes a plurality of slots, and the distance between two adjacent slots in the outer R area of the first bending is greater than the distance between two adjacent slots in the outer R area of the second bending.

[0196] In the display module, the display driver integrated circuit (DDIC) and the touch panel integrated circuit (TPIC) are important components of the display touch imaging system, which integrates resistors, regulators, power transistors and other components, and is responsible for driving the display panel and controlling the driving current.

[0197] FIG. 12 And FIG. 13 shows one of the packaging structures of the display driver integrated circuit (DDIC), and FIG. 13 is a sectional view along the M-M direction of FIG. 12 The packaging structure can be referred to as chip on panel (COP) packaging.

[0198] As FIG. 12 And FIG. 13 , the edge part of the display screen 112 is bent, so that the display screen 112 forms a display area AA and a lower frame area CC, and an edge bending area BB connecting the display area AA and the lower frame area CC.

[0199] FIG. 12 And FIG. 13 The display area AA in FIG. 12 And FIG. 13 The edge bending area BB and the lower frame area CC in

[0200] The display driving chip 13 is arranged on the lower frame area CC, and other electronic devices 14, such as a touch chip (TPIC), a capacitor, a resistor, and the like, are integrated on the circuit board 12 electrically connected with the main circuit board, such as arranged on a flexible printed circuit (FPC), and the circuit board 12 is connected with the lower frame area CC through an electrical connection structure 16 to realize signal interconnection between the electronic devices 14 on the circuit board 12 and the display driving chip 13.

[0201] FIG. 13 When the edge bending area BB of the display screen 112 is bent, the bending radius R gradually decreases (for example, the bending radius R is close to 0.2 mm), so that the display screen 112 wire stress increases, and external impact can easily cause wire cracking, disconnection and other adverse phenomena.

[0202] In order to reduce the bending stress and improve the strength of the edge bending area BB part to cope with the cracking situation in the bending process, the module or the whole machine under stress. In some examples, such as FIG. 14 The surface of the edge bending area BB of the display screen 112, the display area AA and the surface of the lower frame area CC close to the edge bending area BB can be coated with a piezoelectric ceramic spray valve to form a glue layer 15 to adjust the display screen 112 metal wire layer to the stress neutral layer. That is, the glue layer 15 is used to improve the stress distribution and improve the strength of the edge bending area BB to protect the display module from damage.

[0203] When the glue coating is performed, a relatively thick glue layer 15 is generally used, such as FIG. 14 The thickness E of the glue layer 15 reaches about 90 μm to ensure the protection effect, which will increase the frame size of the folding electronic device. Due to the limitation of the glue coating process, there will be a large process tolerance, such as the thickness E of the glue layer 15 is ± (20 μm-30 μm), so that the thickness size of the glue layer 15 is not uniform, such as FIG. 14 The thickness of the glue layer 15 on the display area AA side is thicker, and the thickness of the glue layer 15 on the lower frame area CC side is thinner. In order to achieve the protection effect, a relatively thick glue layer 15 needs to be set, which will further increase the frame size.

[0204] In order to solve the problem of the relatively thick glue layer 15 increasing the frame size as described in the above examples, some embodiments are given in the present application, which can realize a relatively thin glue layer and narrow frame on the basis of ensuring the strength of the edge bending area BB and meeting the protection effect. The structure that can be realized is as follows.

[0205] FIG. 15is a structural diagram of a display screen 112 in a bent state according to an embodiment of the present application. The display screen 112 includes a display area AA and a lower frame area CC, and an edge bending area BB connecting the display area AA and the lower frame area CC.

[0206] An enhancement layer 1 is arranged on the display surface side of the edge bending area BB. As shown in FIG. 16 FIG. 16 is a structural diagram of the enhancement layer 1 according to an embodiment of the present application. The enhancement layer 1 includes a base film 110A and an adhesive layer 110B. The base film 110A is adhered to the outside of the edge bending area BB through the adhesive layer 110B. The enhancement layer 1 can be arranged on the side of the edge bending area BB away from the center of the arc.

[0207] Compared with FIG. 14 , FIG. 15 and FIG. 16 The base film 110A with uniform thickness is attached to the display surface side of the edge bending area BB through a lamination process to achieve protection of the edge bending area BB.

[0208] FIG. 15 and FIG. 16 As shown in the examples, the thickness of the enhancement layer 1 can be effectively controlled under the premise of ensuring the strength of the edge bending area BB through the lamination process, the thickness of the edge bending area of the display module is controlled, and narrow frame can be achieved.

[0209] In some examples, the elastic modulus of the base film 110A in the enhancement layer 1 can be 1GPa-15GPa. For example, it can be 5GPa, 6GPa, 8GPa, etc.

[0210] The base film 110A can be selected from a variety of materials. For example, at least one of polyethylene terephthalate (PET), polyimide (PI), and transparent polyimide (CPI) can be selected.

[0211] In yet other examples, the elastic modulus of the adhesive layer 110B in the enhancement layer 1 can be less than the elastic modulus of the base film 110A. For example, the elastic modulus of the adhesive layer 110B can be 150MPa-2GPa.

[0212] The adhesive layer 110B can be selected from a variety of materials. For example, pressure-sensitive adhesive, curing adhesive, etc. can be selected.

[0213] The breaking elongation of the adhesive layer 110B is ≥100%, and the adhesive strength is ≥5MPa.

[0214] In preparing FIG. 16 the enhancement layer 1 as shown, the adhesive layer 110B can be processed on the base film 110A through scraping, roller coating, slot coating, etc. ​

[0215] The thickness of the reinforcing layer 1 can be 10-90um, and an example can be 20-60um. The thickness of the base film 110A can be selected from 3-50um. An example can be 5-25um. The thickness of the adhesive layer 110B can be selected from 7-87um, and an example can be 15-55um.

[0216] In the process that can be implemented, the FIG. 16 The reinforcing layer 1 shown in FIG. 1 can be pre-stuck first, and then pressed. For example, it can be pre-pressed on the surface of the edge bending area BB by a low-pressure press head, and then attached (which can match a certain temperature) by a press head with higher pressure or a press cavity.

[0217] When higher pressure is used for pressing, a certain temperature can be matched by the press to cure, for example, the curing method can be selected from UV curing, heat curing, moisture curing, etc. After higher pressure pressing, the reinforcing layer 1 part can be irradiated with UV light (the wavelength of the UV light can be 365nm, 395nm or 405nm, etc.) to cure, so that the adhesive layer 110B is crosslinked on the display screen, and the curing rate, modulus, adhesive strength and other performance requirements are achieved.

[0218] FIG. 17 An example is to FIG. 15 The structure diagram of the display module applied to the display screen 112 containing the reinforcing layer 1 is shown in FIG. 1. As shown in FIG. 17 In the display module, on one side of the display area AA of the display screen 112, a functional layer 120 (such as a polarizer) and a display cover plate 113 are arranged, and the display cover plate 113 is arranged on one side of the functional layer 120 through an optical transparent adhesive OCA 124.

[0219] FIG. 18 Another structure diagram of the display screen 112 in a bent state is given by the embodiment of the present application. On the basis of ensuring the strength of the edge bending area BB and meeting the protection effect, a thinner adhesive layer can also be achieved to realize a narrow frame.

[0220] In the display screen 12 shown in FIG. 18 In the display screen 12 shown in

[0221] FIG. 18 The reinforcing layer 1 in the display screen 12 shown in FIG. 1 is selected from a material with a large elastic modulus, which can be 1GPa-15GPa. An example can be greater than or equal to 10GPa.

[0222] FIG. 18elongation at break of the reinforcing layer 1 is ≥ 20%, and the adhesive strength is ≥ 5 MPa.

[0223] When a material with a large elastic modulus is selected and the reinforcing layer 1 is prepared by using the inkjet printing IJP method, the thickness of the reinforcing layer 1 can be 1 um-30 um. For example, it can be 3 um-20 um. In this way, the thickness of the reinforcing layer 1 can be significantly reduced, further reducing the size of the narrow frame.

[0224] FIG. 18 For example, the material of the reinforcing layer 1 can be selected from polyurethane, acrylate, silicone, or epoxy resin, etc.

[0225] In the preparation FIG. 18 When the structure shown in the figure is prepared, the inkjet printing device can be used to print the high modulus IJP material, and then the material printed by the inkjet printing can be cured by using a curing method (UV curing, heat curing, moisture curing, etc.). If UV curing is used, the material printed by the inkjet printing can be cured by irradiating UV light (the wavelength of the UV light can be 365 nm, 395 nm, or 405 nm, etc.) to crosslink the colloid, so as to achieve the required curing rate, modulus, adhesive strength, etc.

[0226] FIG. 19 For example, the FIG. 18 The structure diagram of the display screen 112 containing the reinforcing layer 1 applied to the display module is shown. As shown in the figure FIG. 19 In the display module, on one side of the display area AA of the display screen 112, the functional layer 120 (such as a polarizing plate) and the display cover plate 113 are arranged, and the display cover plate 113 is arranged on one side of the functional layer 120 through the optical transparent adhesive OCA 124. After the edge bending area BB is bent, some film layer structures are also stacked in the area between the display area AA and the lower frame area CC, such as the stacked film layer structures including the support plate 111, the screen support layer 123, the screen support layer 123 is connected with the display area AA of the display screen 112 through the filling layer 121, and the support plate 111 is connected with the lower frame area CC of the display screen 112 through the filling layer 122.

[0227] FIG. 20 The structure diagram of the display module in the bending state is given by the embodiment of the present application. On the basis of ensuring the strength of the edge bending area BB and meeting the protection effect, a thinner adhesive layer can also be realized, and a narrow frame can be realized.

[0228] FIG. 20 As shown in the display module, not only the reinforcing layer 1 is arranged on one side of the display surface of the edge bending area BB, but also the reinforcing layer 17 is arranged on one side of the back surface of the edge bending area BB.

[0229] In FIG. 20In this embodiment, the reinforcing layer 1 includes a laminated base film 110A and an adhesive layer 110B, and the base film 110A is bonded to the display surface side of the edge bending area BB through the adhesive layer 110B.

[0230] The base film 110A and the adhesive layer 110B can be made of the same material, have the same elastic modulus, and be prepared in the same way as the base film 110A and the adhesive layer 110B described above. FIG. 15 and FIG. 16 The above-mentioned examples are not repeated here.

[0231] FIG. 20 The reinforcing layer 17 in the edge bending area BB is made of a material having an elastic modulus less than that of the base film 110A. For example, the elastic modulus of the material of the reinforcing layer 17 is greater than or equal to 5 MPa. In addition, the elongation at break of the reinforcing layer 17 is greater than or equal to 100%, and the adhesive strength is greater than or equal to 1 MPa.

[0232] In this embodiment, by arranging the reinforcing layer 17 on the side of the edge bending area BB close to the center of the arc structure, the impact resistance of the display module can be improved.

[0233] By cooperating the reinforcing layer 1 and the reinforcing layer 17, the strength of the edge bending area BB can be further improved. The reinforcing layer 17 made of a material having a small elastic modulus basically does not affect the bendability of the edge bending area BB. The reinforcing layer 17 arranged on the side of the display screen 112 close to the center of the arc structure does not increase the thickness of the edge bending area BB of the display module, and does not increase the size of the frame.

[0234] The material of the reinforcing layer 17 can be selected from polyurethane, acrylate, silicone, epoxy resin, etc.

[0235] When preparing the structure shown in FIG. 20 the above-mentioned FIG. 16 In the structure shown in FIG. 20 the reinforcing layer 1 is arranged on the display surface side of the edge bending area BB of the display screen 112.

[0236] The reinforcing layer 17 can be prepared by dispensing and coating adhesive on the back side of the edge bending area BB. The amount of adhesive used to prepare the reinforcing layer 11 can be accurately calculated according to the inner arc space, and the amount of adhesive and the filling state can be adjusted. UV delayed curing or UV pre-curing, and moisture curing can be used to cross-link the adhesive, so as to achieve the required curing rate, modulus, adhesive strength and other performance requirements.

[0237] FIG. 21 is another structure diagram of a display module in a bent state according to an embodiment of the present application. The above-mentioned FIG. 20Similarly, while ensuring the strength of the BB layer in the bending area at the edge and meeting the protection requirements, a thinner adhesive layer can also be achieved to create a narrow bezel.

[0238] FIG. 21 The structure shown and FIG. 20 The difference in the structure shown is that: FIG. 20 In the display 112, on one side of the display surface in the edge bending area BB, is a reinforcement layer 1 comprising a base film 110A and an adhesive layer 110B. FIG. 21 In the middle, the reinforcing layer 1 is made of a material with a large elastic modulus and is prepared by inkjet printing IJP method.

[0239] FIG. 21 The structure shown and FIG. 20 The structure shown is the same in that: not only is an enhancement layer 1 provided on the display side of the edge bending area BB of the display screen 112, but a reinforcement layer 17 is also provided on the back side of the edge bending area BB.

[0240] FIG. 22 This is a structural diagram of another display module in a bent state, as provided in an embodiment of this application. This embodiment can also achieve a thinner adhesive layer and a narrower bezel.

[0241] like FIG. 22 A reinforcement layer 1 is provided on one side of the display surface in the edge bending area BB of the display screen 112. The reinforcement layer 1 is made of a material with a high elastic modulus and is produced by inkjet printing IJP method. In addition, a buffer layer 18 is provided on the side of the reinforcement layer 1 away from the display screen 112.

[0242] The elastic modulus of the buffer layer 18 is less than that of the base film 110A. For example, the elastic modulus of the base film 110A is 1 GPa-15 GPa; the elastic modulus of the buffer layer 18 is 100 MPa-1000 MPa. In addition, the elongation at break of the buffer layer 18 is ≥100%, and the adhesive strength is ≥5 MPa.

[0243] The thickness of the reinforcing layer 1 can be 1µm-30µm. For example, it can be 3µm-20µm.

[0244] The thickness of the buffer layer 18 can be 1um-50um. For example, it can be 5um-30um.

[0245] In this embodiment, since the reinforcing layer 1 prepared by the inkjet printing IJP method is relatively thin, adding the buffer layer 18 will not widen the border size. Furthermore, the buffer layer 18 and the reinforcing layer 1 prepared by the inkjet printing IJP method can further enhance the strength of the edge bending region BB. The use of the buffer layer 18 with a low elastic modulus can also ensure the bendability of the edge bending region BB.

[0246] The material of the buffer layer 18 can be selected from a variety of materials. For example, the material can be polyurethane, acrylate, or silicone, etc.

[0247] FIG. 23 Fig. 8 is a structural diagram of another display module in a folded state according to an embodiment of the present application. This embodiment can also achieve a thin glue layer and a narrow frame.

[0248] FIG. 23 The structures shown in Figs. 7 and 8 are the same in that: on the display surface side of the edge bending area BB of the display screen 112, a reinforcing layer 1 and a buffer layer 18 are arranged, and the reinforcing layer 1 is closer to the display screen 112 than the buffer layer 18. FIG. 22 The structures shown in Figs. 7 and 8 are different in that: In Fig. 7, the reinforcing layer 1 is made by an inkjet printing IJP method. In Fig. 8, the reinforcing layer 1 includes a base film 110A and an adhesive layer 110B, that is, the adhesive layer 110B, the base film 110A, and the buffer layer 18 are sequentially stacked in the direction away from the display screen 112.

[0249] FIG. 23 The structures shown in Figs. 7 and 8 are the same in that: FIG. 22 The structures shown in Figs. 7 and 8 are different in that: FIG. 22 In Fig. 7, the reinforcing layer 1 is made by an inkjet printing IJP method. In Fig. 8, the reinforcing layer 1 includes a base film 110A and an adhesive layer 110B, that is, the adhesive layer 110B, the base film 110A, and the buffer layer 18 are sequentially stacked in the direction away from the display screen 112. FIG. 23 In the process that can be implemented, after the reinforcing layer 1 is made on the display surface side of the edge bending area BB of the display screen 112, a dispensing process can be used, or an inkjet printing process can be used to make the buffer layer, and the buffer layer can be cured. The curing method is UV curing, and UV light (the wavelength of the UV light can be 365 nm, 395 nm, or 405 nm, etc.) is irradiated to the glue film part to cure, so that the glue is crosslinked to achieve the required curing rate, modulus, adhesive strength, etc.

[0250] In the process of making the display module shown in Fig. 7, the functional layer 120 can be arranged on the display surface side of the display screen 112 first, such as a polarizing plate; then the reinforcing layer 1 or the reinforcing layer 17 is arranged on the edge bending area BB of the display screen 112; then the display screen 112 is cut; then the display driving chip DDIC and the touch control chip TPIC, etc. are arranged on the lower frame area CC of the display screen 112, as well as the connection circuit board 12, etc.; and then other film layer structures are stacked.

[0251] FIG. 17 to FIG. 23 In the folding electronic device, as shown in Fig. 9, the frame 102 (which can also be referred to as a small A shell) of the shell 100 arranged in a folding manner is arranged between the display module 11 and the display module 11. The foam glue 20 can prevent external water vapor from entering the shell 100 to corrode some electronic devices or other structural parts in the shell 100.

[0252] In the folding electronic device, as shown in Fig. 9, the frame 102 (which can also be referred to as a small A shell) of the shell 100 arranged in a folding manner is arranged between the display module 11 and the display module 11. The foam glue 20 can prevent external water vapor from entering the shell 100 to corrode some electronic devices or other structural parts in the shell 100. FIG. 24

[0253] ​In some examples, foam adhesive 20 is bonded between the frame 102 and the display module 11 via an adhesive. Consideration should be given to the assembly tolerances of the foam adhesive 20, the clearance between the display module 11 and other structural components, and the misalignment of the display module 11 when bent.

[0254] like FIG. 24 As shown, at least the following factors exist: the adhesion tolerance d of the foam adhesive 20 on the frame 102, the distance a between the outer end face of the display module 11 and the frame 102, and the effective overlap width c between the foam adhesive 20 and the display module 11. In some electronic devices, such as mobile phones, a1 = 1.1mm, c1 = 0.45mm, d1 = 0.25mm, so a1 + c1 + d1 = 1.8mm, which will make the frame width of the electronic device (e.g., FIG. 24 The S-axis dimension is relatively wide, which reduces the screen-to-body ratio and affects the overall aesthetics of the device.

[0255] To compress the width of the border, embodiments of this application provide some feasible structures, as follows:

[0256] like FIG. 25 As shown, FIG. 25 This describes the positional relationship between the frame 102, the middle frame 101, the display module 11, and the first filling layer 601 as shown in the embodiments of this application. The frame 102 and the first filling layer 601 are integrally formed structures. For example, the integrally formed frame 102 and the first filling layer 601 can be manufactured by injection molding, such as by two-color injection molding.

[0257] like FIG. 25 A first filling layer 601 is provided at the position where the frame 102 of the housing 100 is attached to the display surface of the display module 11. The first filling layer 601 and the frame 102 are integrally formed structural components.

[0258] In some examples, a first filling layer 601 is provided at the position where the frame 102 of the housing 100 is attached to the display surface of the display module 11. This can be: the frame 102 of the housing 100 has a first surface facing the display surface of the display module 11, and a first filling layer 601 protruding from the first surface is provided at the position of the first surface opposite to the display module 1111.

[0259] For example, the material of the first filler layer 601 can be at least one of silicone or thermoplastic polyurethane (TPU). The material of the frame 102 can be plastic or the like.

[0260] During assembly, since the frame 102 and the first filling layer 601 are integrally formed structures, there will be no issues such as...FIG. 24 The fit tolerance d between the frame 102 and the foam adhesive 20 shown is not required during the design process, and the width dimension S of the frame can be compressed.

[0261] To further compress the width S of the border 102, the side S1 of the first fill layer 601 away from the outer edge of the electronic device is flush with the side S2 of the border 102 away from the outer edge of the electronic device. This reduces the width of the border.

[0262] In some embodiments of this application, the fact that side S1 and side S2 are flush can mean that side S1 and side S2 are located on the same plane.

[0263] like FIG. 26 There is a clearance between the display module 11 and the frame 102. When the foldable electronic device is folded, it has a certain amount of movement and rubbing, so that there is a distance a1 between the outer end face of the display module 11 and the frame 102. In order to avoid the display module hitting the middle frame 102 during use, the distance a1 is also relatively large, which is also the main factor leading to the large frame width.

[0264] To reduce the impact of this factor on the border width, such as FIG. 26 , FIG. 26 This illustrates the positional relationship between the frame 102, the middle frame 101, the display module 11, and the first filling layer 601 as shown in this embodiment. The frame 102 has a second filling layer 602 at a position opposite to the side of the display module 11, and the elastic modulus of the second filling layer 602 is less than the elastic modulus of the frame 102.

[0265] The side of the display module 11 in this application example is the side of the display module 11 opposite to the side of the electronic device.

[0266] When display module 11 along FIG. 26 When the device moves in the Q direction, it may collide with the second filler layer 602, which has a smaller elastic modulus. Since the second filler layer 602 has a smaller elastic modulus than the frame 102, it can cushion the display module 11 and reduce the chance of damage to the display module 11.

[0267] It can be reduced FIG. 26 The spacing between the outer end face of the display module 11 and the frame 102 can further compress the width dimension S of the frame.

[0268] The second filler layer 602 and the frame 102 can be a single-piece molded structure. In some optional processes, injection molding (such as two-color injection molding) can be used to produce the single-piece second filler layer 602 and frame 102, which can simplify the assembly process.

[0269] For example, the material of the second filling layer 602 can be selected from at least one of silica gel and thermoplastic polyurethane (TPU).

[0270] Referring to FIG. 24 When the frame 102 structure comprising the first filling layer 601 and the second filling layer 602 is adopted, compared with the above FIG. 24 The effective overlap width b2 of the first filling layer 202 and the display module 11, and FIG. 26 The effective overlap width c1 of the foam glue 20 and the display module 11 in the above FIG. 26 In the above FIG. 22 The size a2+b2 in the above FIG. 27 The width size of one side of the frame 102 can be compressed by 0.3mm to 0.5mm.

[0271] As shown in FIG. 26 When the four side edges of the frame 102 all adopt the above FIG. 28 The size along the X direction (such as the width direction of the electronic device) can be compressed by 0.6mm to 1mm, and similarly, the size along the Y direction (such as the length direction of the electronic device) can also be compressed by 0.6mm to 1mm. In this way, the screen ratio can be obviously improved, the delicacy of the product can be improved, and the user experience can be improved.

[0272] In the folded electronic device, the application scenarios are more and more widely, for example, the device with a larger display screen is applied in business office work, and the demand for a stylus is more and more intense.

[0273] In some examples, an electromagnetic induction structure can be attached in the display module of the display electronic device. When the electromagnetic pen touches the surface of the display module, the electromagnetic pen emits an electromagnetic signal, and the electromagnetic induction structure in the display module senses the electromagnetic signal emitted by the electromagnetic pen, and the position of the electromagnetic pen can be obtained according to the sensing signal, and then the content input by the user through the electromagnetic pen can be obtained.

[0274] As shown in FIG. 28 FIG. 28 ​The display module 11 includes a display panel 112, a display cover 113, and a back protective layer 116. The display cover 113 is disposed on the display side of the display panel 112, and the display cover 113 is light-transmissive. Light transmitted by the display side of the display panel 112 can be transmitted through the display cover 113 and received by a user; the back protective layer 116 is disposed on the back side of the display panel 112, and is used to support and protect the display panel 112; the display cover 113 and the back protective layer 116 are connected together with the display panel 112 through an adhesive layer, to form a core layer structure of the display module.

[0275] FIG. 28 In the preparation of the display module shown, the independent electromagnetic induction structure 125 in the form of a plate is disposed between the support plate 111 and the back protective layer 116, and is connected with the back protective layer 116 through the adhesive layer 1, and is connected with the support plate 111 through the adhesive layer 2.

[0276] FIG. 29 In the structure shown, the thickness of the electromagnetic induction structure 125 is substantially 80 μm to 107 μm, and the thicknesses of the adhesive layer 1 and the adhesive layer 2 are 25 μm to 30 μm, respectively. This makes the thickness dimension of the entire display module larger, and can reduce the bendable performance of the display module.

[0277] In order to compress the thickness dimension of the display module and improve the bendable performance of the display module, some display module structures containing the electromagnetic induction structure are provided in the embodiments of the present application, and details are described below.

[0278] FIG. 29 The structure shown is a structure schematic diagram of a display module 11. The display module 11 of this example includes a display panel 112, a display cover 113, a back protective layer 116, a support plate 111, and an electromagnetic induction structure 125.

[0279] In FIG. 30 , the electromagnetic induction structure 125 is disposed on the support plate 111, and the support plate 111 is used as a carrier of the electromagnetic induction structure 125.

[0280] FIG. 31 And FIG. 30 are two different implementation structures of the electromagnetic induction structure 125 provided in the embodiments of the present application.

[0281] In FIG. 30 , when the support plate 111 is made of a conductive material, for example, is made of metal. The electromagnetic induction structure 125 includes a first induction electrode layer 1251, a second induction electrode layer 1252, a first insulating layer 1253, and a second insulating layer 1254.

[0282] The first sensing electrode layer 1251 and the second sensing electrode layer 1252 are stacked on one side of the support plate 111. Since the support plate 111 is made of a conductive material, the first insulating layer 1253 is arranged between the first sensing electrode layer 1251 and the support plate 111. The first sensing electrode layer 1251 and the conductive support plate 111 are electrically isolated by the first insulating layer 1253, which ensures the working performance of the sensing electrode.

[0283] The first sensing electrode layer 1251 is arranged on the side of the first insulating layer 1253 away from the support plate 111. The first sensing electrode layer 1251 is arranged on the surface of the first insulating layer 1253 away from the support plate 111. The second sensing electrode layer 1252 is arranged in a stacked manner with the first sensing electrode layer 1251, and the first sensing electrode layer 1251 and the second sensing electrode layer 1252 are electrically isolated by the second insulating layer 1254. The first sensing electrode layer 1251 is covered by the second insulating layer 1254, and the second sensing electrode layer 1252 is arranged on the surface of the second insulating layer 1254.

[0284] As shown in FIG. 30 , the electromagnetic induction structure 125 further includes a flat layer 1255 covering the second sensing electrode layer 1252. The flat layer 1255 not only protects the second sensing electrode 1252, but also improves the surface flatness and reduces the occurrence of the display module.

[0285] The FIG. 29 structure is applied to the display module 11 shown in FIG. 29 . In this implementation structure, the support plate 111 carrying the electromagnetic induction structure 125 is connected to other structures of the display module 11 through the adhesive layer 1. For example, the back protection layer 116 is arranged on the back side of the display screen 112, and the flat layer 1255 is adhered to the back protection layer 116 through the adhesive layer 1.

[0286] FIG. 30 and FIG. 28 The display module is compared with the display module shown in FIG. 29 , and the adhesive layer 2 with a thickness of 25 μm to 30 μm is omitted. The thickness of the entire display module is compressed.

[0287] Since the electromagnetic induction structure 125 is directly arranged on the support plate 111, the thickness of the electromagnetic induction structure 125 is compressed from 80 μm to 107 μm in FIG. 29 to about 5 μm. The thickness of the entire display module is obviously compressed, and the bendable performance of the display module is improved.

[0288] In the process that can be implemented, the display module shown in FIG. 30 and FIG. 31 can be prepared in the following manner.

[0289] Step 1: Set the first insulating layer 1253 on one side of the support plate 111.

[0290] Step 2: Set the first sensing electrode layer 1251 on the side of the first insulating layer 1253 away from the support plate 111. For example, the patterned first sensing electrode layer 1251 can be made by plating etching or printing.

[0291] Step 3: Set the second insulating layer 1254 so that it covers the first sensing electrode layer 1251.

[0292] Step 4: Set the second sensing electrode layer 1252 on the side of the second insulating layer 1254 away from the first sensing electrode layer 1251. For example, the patterned second sensing electrode layer 1252 can be made by plating etching or printing.

[0293] Step 5: Set the flat layer 1255 so that the second sensing electrode layer 1252 is covered by the flat layer 1255.

[0294] Step 6: Make the stacked display screen 112, display cover plate 113, and back protective layer 116.

[0295] Step 7: Connect the support plate 111 carrying the electromagnetic induction structure 125 with the multilayer film structure made in Step 6. For example, use the adhesive layer 1 to bond the back protective layer 116 and the flat layer 1255 together.

[0296] As shown in FIG. 31 , the electromagnetic induction structure 125 includes a first sensing electrode layer 1251, a second sensing electrode layer 1252, a second insulating layer 1254, and a flat layer 1255. FIG. 31 is another implementation structure of the electromagnetic induction structure given by the embodiments of the present application. In this example, the support plate 111 is made of an insulating material, such as carbon fiber, etc.

[0297] Since the support plate 111 in this example is made of an insulating material, the electromagnetic induction structure 125 includes a first sensing electrode layer 1251, a second sensing electrode layer 1252, a second insulating layer 1254, and a flat layer 1255.

[0298] The first sensing electrode layer 1251 is set on the surface of the support plate 111, the second sensing electrode layer 1252 is stacked on the side of the first sensing electrode layer 1252 away from the support plate 111, and the first sensing electrode layer 1251 and the second sensing electrode layer 1252 are electrically isolated by the second insulating layer 1254. The first sensing electrode layer 1251 is covered by the second insulating layer 1254, and the second sensing electrode layer 1252 is set on the surface of the second insulating layer 1254.

[0299] The structure shown in FIG. 29 is applied toFIG. 30 The display module 11 is shown. In this implementation structure, the support plate 111 carrying the electromagnetic induction structure 125 is connected with other structures of the display module 11 through the adhesive layer 1. For example, a back protective layer 116 is arranged on the back side of the display screen 112, and the planar layer 1255 is adhered to the back protective layer 116 through the adhesive layer 1.

[0300] As FIG. 31 and FIG. 28 compared with the display module shown above FIG. 29 The adhesive layer 2 with a thickness of 25 μm to 30 μm is omitted in the display module shown. The thickness of the entire display module is compressed.

[0301] Since the electromagnetic induction structure 125 is directly arranged on the support plate 111, one layer of insulating layer is also omitted, and the thickness of the electromagnetic induction structure 125 is compressed from 80 μm to 107 μm in the FIG. 29 above to below 5 μm. The thickness of the entire display module is obviously compressed, and the bendable performance of the display module is improved.

[0302] In the process that can be implemented, the display module shown above FIG. 31 and FIG. 32 can be prepared in the following manner.

[0303] Step 1: A first induction electrode layer 1251 is arranged on one side of the support plate 111. For example, the patterned first induction electrode layer 1251 can be prepared by plating etching or printing.

[0304] Step 2: A second insulating layer 1254 is arranged so as to cover the first induction electrode layer 1251.

[0305] Step 3: A second induction electrode layer 1252 is arranged on the side of the second insulating layer 1254 away from the first induction electrode layer 1251. For example, the patterned second induction electrode layer 1252 can be prepared by plating etching or printing.

[0306] Step 4: A planar layer 1255 is arranged so as to cover the second induction electrode layer 1252.

[0307] Step 5: A multi-layer film structure of the display screen 112, the display cover plate 113 and the back protective layer 116 is prepared.

[0308] Step 6: The support plate 111 carrying the electromagnetic induction structure 125 is connected with the multi-layer film structure prepared in Step 5. For example, the back protective layer 116 and the planar layer 1255 are adhered together by the adhesive layer 1.

[0309] In order to compress the thickness of the display module and improve the bendable performance, FIG. 32 is another structure that can be implemented by the display module according to the embodiments of the present application.

[0310] As shown in FIG. 33 , the display module includes a display screen 112 and a display cover plate 113. The display cover plate 113 is arranged on the display side of the display screen 112.

[0311] The display module further includes an electromagnetic induction structure 125. The electromagnetic induction structure 125 is arranged on one side of the support plate 111 through an adhesive layer 2, and is connected with the display screen 112 through an adhesive layer 3.

[0312] FIG. 32 The structure diagram of the electromagnetic induction structure 125 that can be applied to the display module shown in FIG. 33 is shown. The electromagnetic induction structure 125 includes a first induction electrode layer 1251, a second induction electrode layer 1252, a substrate 1256, a first flat layer 1257, and a second flat layer 1258.

[0313] The first induction electrode layer 1251 and the second induction electrode layer 1252 are arranged on opposite sides of the substrate 1256. The first flat layer 1257 is located on one side of the substrate 1256 and covers the first induction electrode layer 1251. The second flat layer 1258 is located on the other side of the substrate 1256 and covers the second induction electrode layer 1252.

[0314] In some examples, the substrate 1256 can be selected from at least one of polyethylene terephthalate (PET), polyimide (PI), and transparent polyimide (CPI).

[0315] The structure shown in FIG. 32 is applied to the display module shown in FIG. 33 . In this implementation structure, the first flat layer 1257 is connected with the support plate 111 through the adhesive layer 2, and the second flat layer 1258 is connected with the display screen 112 through the adhesive layer 3.

[0316] As shown in FIG. 32 and FIG. 28 , compared with the display module shown in FIG. 28 , the back protective layer 116 is omitted because the substrate 1256 in the electromagnetic induction structure 125 has sufficient strength to support and protect the display screen 112. Moreover, the thickness of the electromagnetic induction structure 125 in this example is 40 μm to 60 μm, for example, 50 μm. Compared with the electromagnetic induction structure in FIG. 32 , which has a thickness of 80 μm to 107 μm, the display module shown in FIG. 33 and FIG. 28 can significantly compress the thickness and improve the bendable performance of the display module.

[0317] Compared with FIG. 32 , the adhesive layer 1 can be omitted, the thickness dimension can be further compressed, and the bending performance can be optimized.

[0318] In the process that can be implemented, the following method can be adopted to prepare FIG. 33 and FIG. 34 The display module is shown.

[0319] Step 1: a first induction electrode layer 1251 and a first flat layer 1257 are arranged on one side of a substrate 1256, the first flat layer 1257 covers the first induction electrode layer 1251; and a second induction electrode layer 1252 and a second flat layer 1258 are arranged on the other side of the substrate 1256, the second flat layer 1258 covers the second induction electrode layer 1252.

[0320] Step 2: the second flat layer 1258 and the display screen 112 are bonded together by using the adhesive layer 3, and a display cover plate 113 can be arranged on the display side of the display screen 112.

[0321] Step 3: the first flat layer 1257 and the support plate 111 are bonded together by using the adhesive layer 2. In the above embodiments, the first electromagnetic induction layer 1251 can be an electrode layer that induces a first direction, for example, an electrode layer that induces an X direction, and the second electromagnetic induction layer 1252 can be an electrode layer that induces a second direction, for example, an electrode layer that induces a Y direction perpendicular to the X direction.

[0322] As FIG. 35 and FIG. 34 , FIG. 35 The structure diagram of the first induction electrode layer 1251 is shown, FIG. 36 The structure diagram of the second induction electrode layer 1252 is shown. The electrodes in the first induction electrode layer 1251 can extend along the X direction, and adjacent two electrodes are connected to form a current loop; the electrodes in the second induction electrode layer 1252 can extend along the Y direction, and adjacent two electrodes are also connected to form a current loop.

[0323] In some optional materials, the electrodes in the first induction electrode layer 1251 or the electrodes in the second induction electrode layer 1252 can be selected from, but are not limited to, at least one of copper, aluminum, iron, tungsten, gold, silver, and of course can also be an alloy material.

[0324] The flat layer can be made of an insulating material, for example, an organic insulating material.

[0325] In the foldable electronic device described above, how to thin the overall size is embodied. In order to further improve the product performance, it is also necessary to improve the impact resistance and external force resistance of the non-bending area, and to improve the bendability of the bending area.

[0326] The application provides some display module embodiments, which can not only improve the rigidity of the exposed non-bending area, but also will not weaken the bendability of the bending area.

[0327] FIG. 36 is a structural diagram of a display module provided by an embodiment of the application. A display screen 112 in the display module 11 includes a first non-bending part, a second non-bending part, a third non-bending part, a first bending part, and a second bending part; the first bending part connects the first non-bending part and the second non-bending part, and the second bending part connects the second non-bending part and the third non-bending part.

[0328] The cover plate 110 in the display module 11 includes a first non-bending area, a second non-bending area, and a third non-bending area, a first bending area connecting the first non-bending area and the second non-bending area, and a second bending area connecting the second non-bending area and the third non-bending area.

[0329] The first non-bending part of the display screen 112 corresponds to the first non-bending area of the cover plate 110, the first bending part of the display screen 112 corresponds to the first bending area of the cover plate 110, the second non-bending part of the display screen 112 corresponds to the second non-bending area of the cover plate 110, the second bending part of the display screen 112 corresponds to the second bending area of the cover plate 110, and the third non-bending part of the display screen 112 corresponds to the third non-bending area of the cover plate 110.

[0330] The first bending area, the first bending part, the second bending area, and the second bending part can all be bent along the bending line to switch between the unfolded state and the closed state.

[0331] FIG. 36 is an example of three-screen folding. In other examples, more bending areas and non-bending areas can be added to the structure shown in FIG. 36 to form four-screen folding, five-screen folding, and other electronic devices.

[0332] As shown in FIG. 37 , the thickness of the first non-bending area of the cover plate 110 is d1, the thickness of the second non-bending area is d2, and the thickness d1 is not equal to the thickness d2, for example, the thickness d1 can be greater than the thickness d2.

[0333] FIG. 36 is a structural diagram of another display module provided by an embodiment of the application. And the above FIG. 38Similarly, the thickness of the first non-bending area of ​​the cover plate 110 is d1, and the thickness of the second non-bending area is d2. The thicknesses d1 and d2 are not equal, with d1 being greater than d2.

[0334] FIG. 36 This is a structural diagram of another display module provided in an embodiment of this application. And the above... FIG. 37 and FIG. 36 Similarly, in cover plate 110, the thickness d1 of the first non-bending region is not equal to the thickness d2 of the second non-bending region, with thickness d1 being greater than thickness d2.

[0335] The thickness dimensions mentioned in the embodiments of this application refer to: such as FIG. 36 The dimensions along the stacking direction (P direction) of multiple film layers.

[0336] FIG. 37 , FIG. 38 and FIG. 36 to FIG. 38 In the three different examples of the module 11 shown, the thickness d4 of the first bent region of the cover plate 110 is not constant, but gradually decreases along the direction away from the first non-bent region, which can be from the first non-bent region to the second non-bent region, so that the thickness d2 is less than the thickness d1.

[0337] like FIG. 36 In the cover plate 110, the first non-bending area is a thick area, the second non-bending area is a thin area, and the first bending area connecting the first non-bending area and the second non-bending area is a thin-thickness transition area.

[0338] FIG. 37 , FIG. 38 and FIG. 36 The differences between the three different examples of module 11 shown include:

[0339] FIG. 36 In the cover plate 110, the thickness of the second bending region is d5, the thickness of the third non-bending region is d3, and the thicknesses d2, d5, and d3 are equal. The first non-bending region is a thick region, the first bending region is a thickness transition region, and the second non-bending region, the second bending region, and the third non-bending region are thin regions of equal thickness.

[0340] and the above FIG. 37 compared to, FIG. 37 In the example shown, not only is the thickness d4 of the first bent region not a constant value, but the thickness d2 of the second non-bent region is also not a constant value. In some examples, the thickness of the first bent region and the second non-bent region of the cover plate 110 gradually decreases along the direction away from the first non-bent region, which can mask the visual effect of uneven thickness of the entire display module.

[0341] existFIG. 37 In the case of the cover plate 110, the thickness of the second bent area and the third non-bent area are equal. That is, the thickness d5 is equal to the thickness d3.

[0342] exist FIG. 36 In the diagram, the first non-bending region is the thickest region, the first bending region and the second non-bending region are the transitional regions between thick and thin regions, and the second bending region and the third non-bending region are thin regions of equal thickness.

[0343] and the above FIG. 37 and FIG. 38 In comparison, FIG. 39 In this design, not only are the thicknesses of the first bent area and the second non-bent area of ​​the cover plate 110 not constant, but the thicknesses of the second bent area and the third non-bent area of ​​the cover plate 110 are also not constant. Along the direction away from the first non-bent area, the thicknesses of the first bent area, the second non-bent area, the second bent area, and the third non-bent area of ​​the cover plate 110 gradually decrease. This further masks the visual effect of uneven thickness across the entire display module.

[0344] FIG. 36 It is FIG. 36 to FIG. 38 The present application provides a structural diagram of the display module 11 after bending. The thickness of the exposed (visible to the user when folded) first non-bending area is greater than the thickness of the non-exposed (invisible to the user when folded) second non-bending area. The first bending area connected to the exposed first non-bending area is designed with an unequal thickness structure. Even if the thickness of the first non-bending area is increased to improve its rigidity and strength, it will not affect the bendability of the bending area. Nor will it increase the thickness of other areas, so the overall thickness will not be significantly increased when the device is in a folded state.

[0345] In some examples, the above FIG. 39 The example's folded area can form an inward fold, or it can form an outward fold. For example, FIG. 40 As shown in the folded configuration, the first folded area forms an outward folded area, and the second folded area forms an inward folded area. The first non-folded area is exposed and visible to the user, while the second and third non-folded areas are opposite and not visible to the user.

[0346] like FIG. 40 , FIG. 40 This is a structural diagram of a display module according to an embodiment of this application. The thickness of the display cover plate 113 located in the first non-bending region is greater than the thickness located in the second non-bending region. Along the direction away from the first non-bending region, the thickness of the display cover plate 113 located in the first bending region gradually decreases.

[0347] exist FIG. 40In this process, the thickness of the protective layer 114 is equal in all bending areas and in all non-bending areas.

[0348] FIG. 41 This is a structural diagram of another display module provided in the embodiments of this application. In this structure, the thickness of the protective layer 114 located in the first non-bending region is greater than the thickness located in the second non-bending region, and the thickness of the protective layer 114 located in the first bending region gradually decreases along the direction away from the first non-bending region.

[0349] exist FIG. 42 In the middle, it is shown that the thickness of the cover plate 113 is equal in each bending area and each non-bending area.

[0350] FIG. 41 This is a structural diagram of another display module provided in an embodiment of this application. And the above... FIG. 43 In contrast, in this structure, along the direction away from the first non-bending region, the thickness of the first bending region and the thickness of the second non-bending region in the protective layer 114 gradually decrease, thus widening the thickness transition area of ​​the protective layer 114.

[0351] FIG. 41 This is a structural diagram of another display module provided in an embodiment of this application. (And the above...) FIG. 42 and FIG. 41 to FIG. 43 In contrast, in this example, in the protective layer 114, the thicknesses of the first bent region, the second non-bent region, the third non-bent region, and the third non-bent region gradually decrease along the direction away from the first non-bent region. This further widens the thickness transition area of ​​the protective layer 114.

[0352] The above FIG. 41 to FIG. 43 In this example, the protective layer 114 is designed with an uneven thickness structure. In other examples, the uneven thickness transition zone can be set in other film layer structures, for example, in the display cover plate 113. FIG. 44 The structure shown.

[0353] Some examples provided in this application, such as FIG. 44 The display cover 113 or protective layer 114 may include: substrate 11D and buffer layer 11B.

[0354] The substrate 11D and the buffer layer 11B can be connected by an adhesive layer 11C, and an adhesive layer 11A connects these stacked film structures to other layer structures. In some examples, when FIG. 44 When the protective layer 114 is shown, the structure including the substrate 11D, the adhesive layer 11C and the buffer layer 11B can be connected to the display cover plate 113 using the adhesive layer 11A.

[0355] In some alternative materials, the substrate 11D can be selected from at least one of polyethylene terephthalate (PET), polyimide (PI), and transparent polyimide (CPI).

[0356] In some examples, the buffer layer 11B is an elastomer film, and the elastic modulus of the buffer layer 11B is less than the elastic modulus of the substrate 11D. The buffer layer 11B can be selected from at least one of thermoplastic polyurethane elastomer (TPU), thermoplastic polyamide elastomer (TPAE), and other elastomer films.

[0357] The adhesive layer 11A and the adhesive layer 11C can be selected from at least one of optically clear adhesive (OCA), optically clear resin (OCR), acrylic resin, epoxy resin, and the like.

[0358] Referring to FIG. 44 In this embodiment, the buffer layer 11B located in the first bending area is designed as a non-uniform thickness structure. Along the direction away from the first non-bending area, the thickness of the buffer layer 11B located in the first bending area gradually decreases, so that the protective layer 114 or the display cover plate 113 located in the first bending area presents a thick-thin transition area.

[0359] In FIG. 45 In this embodiment, the thickness of the substrate 11D can be 25 μm to 75 μm. The thickness of the adhesive layer 11A and the adhesive layer 11C can be 25 μm to 50 μm.

[0360] The thickness of the buffer layer 11B located in the first non-bending area is 75 μm to 150 μm, and the thickness of the buffer layer 11B located in the second non-bending area, the second bending area and the third non-bending area is 25 μm to 75 μm.

[0361] FIG. 46 This is another structure diagram of the display cover plate 113 or the protective layer 114 given by the embodiments of the present application. In this example, the substrate 11D located in the first bending area is designed as a non-uniform thickness structure. Along the direction away from the first non-bending area, the thickness of the substrate 11D located in the first bending area gradually decreases, so that the protective layer 114 or the display cover plate 113 located in the first bending area presents a thick-thin transition area.

[0362] FIG. 44 This is still another structure diagram of the display cover plate 113 or the protective layer 114 given by the embodiments of the present application. And the above FIG. 47In comparison, not only is the buffer layer 11B located in the first bending area designed as a non-uniform thickness structure, but the buffer layer 11B located in the second non-bending area is also designed as a non-uniform thickness structure. This weakens the visual effect of the uneven thickness of the entire display module.

[0363] FIG. 47 is another structural diagram of the display cover plate 113 or the protective layer 114 given by an embodiment of the present application. In some examples, the thickness of the buffer layer 11B is relatively large, for example, the thickness reaches 100 μm. Due to the relatively thick buffer layer, the strain generated on the upper and lower surfaces of the film material when the display module is bent is prone to enter the plastic deformation stage.

[0364] In order to weaken the strain generated on the upper and lower surfaces of the display module when the display module is bent into the plastic deformation stage and improve the bendable performance, in some examples, as shown in FIG. 47 , the buffer layer 11B includes a first buffer layer 11B1 and a second buffer layer 11B2, the first buffer layer 11B is of an equal thickness structure, and the second buffer layer 11B2 located in the first bending area is designed as a non-uniform thickness structure. The second buffer layer 11B2 of non-uniform thickness is farther away from the display screen than the first buffer layer 11B1 of uniform thickness, that is, it is closer to the interface visible to the user; in other examples, the first buffer layer 11B1 of uniform thickness can also be closer to the interface visible to the user than the second buffer layer 11B2 of non-uniform thickness.

[0365] Referring to FIG. 48 , the first buffer layer 11B1 is connected to the second buffer layer 11B2 through an adhesive layer 11E, and the second buffer layer 11B2 is connected to the substrate 11D through an adhesive layer 11C.

[0366] FIG. 48 is another structural diagram of the display cover plate 113 or the protective layer 114 given by an embodiment of the present application. In some optional processes, the buffer layer 11B and the substrate 11D can be attached together by using a coating process. The adhesive layer used to connect the buffer layer 11B and the substrate 11D can be removed, the thickness size of the entire display module is reduced, and the rigidity of the non-bending area and the bendable performance of the bending area are not weakened.

[0367] FIG. 48 The material of the buffer layer 11B in the example can be selected from at least one of thermoplastic polyurethane elastomer, silicone gel, and shear thickening material.

[0368] Referring to FIG. 49 , in this example, the buffer layer 11B located in the first bending area is designed as a non-uniform thickness structure, and the thickness of each area of the substrate 11D is equal.

[0369] FIG. 49is another structural diagram of the display cover plate 113 or the protective layer 114 given by an embodiment of the present application. In some optional processes, the buffer layer 11B can be attached to the substrate 11D by a coating process. The buffer layer 11B in this example can be selected to have adhesive material, for example, an optical transparent adhesive OCA, etc. The buffer layer 11B not only has an elastic film material, but also has a connecting effect, so that the adhesive layer 11A can not be needed. The thickness of the display module can be further compressed.

[0370] Referring to FIG. 50 In this example, the buffer layer 11B located in the first bending area is designed to have a non-uniform thickness structure, and the thickness of each area of the substrate 11D is equal.

[0371] In order to improve the rigidity of the exposed non-bending area without weakening the bendable performance of the bending area, some structures that can be implemented are given by the embodiments of the present application, as follows.

[0372] FIG. 50 is a structural diagram of a display module given by an embodiment of the present application. The cover plate 110 of the display module 11 has an elastic modulus of the first non-bending area greater than an elastic modulus of the first bending area. The cover plate 110 includes a hard area with a larger elastic modulus and a soft area with a smaller elastic modulus.

[0373] In some examples, when the cover plate 110 includes a display cover plate or a protective layer, the hard area and the soft area can be arranged in at least one of the display cover plate and the protective layer. For example, FIG. 51 is a structural diagram of a display cover plate 113 or a protective layer 114 given by an embodiment of the present application. The display cover plate 113 or the protective layer 114 includes a substrate 11D and a buffer layer 11B, and the substrate 11D and the buffer layer 11B are connected by an adhesive layer 11C.

[0374] As FIG. 51 The buffer layer 11B includes a hard area 11B01 (also called a first part) and a soft area 11B02 (also called a second part), and the elastic modulus of the hard area 11B01 is greater than the elastic modulus of the soft area 11B02. The hard area 11B01 is located in the first non-bending area, and the soft area 11B02 can be located in at least one of the first bending area and the second bending area.

[0375] In FIG. 51 The hard area 11B01 and the soft area 11B02 are an integrated structure connected together. In some optional process procedures, the buffer layer material can be coated on the substrate first, and then cured by UV (ultraviolet light) in different areas to obtain buffer materials with different hardness; in another optional process procedure, the buffer layer material can be heated in different areas to obtain parts with different elastic moduli, so as to obtain the hard area and the soft area.

[0376] The buffer layer 11B is divided into a hard region 11B01 and a soft region 11B02 with different elastic moduli. The hard region 11B01 is located in the first non-bending region, which can improve the stiffness of the first non-bending region. The soft region 11B02 with a smaller elastic modulus is located in the bending region to ensure that the bending region has better bendability.

[0377] exist FIG. 52 In the middle, the elastic modulus of the buffer layer 11B (which can be called the third part) located in the second non-bending region and the third non-bending region can be less than the elastic modulus of the hard region 11B01 and greater than the elastic modulus of the soft region 11B02.

[0378] In some examples, in order to improve the stiffness of the second and third non-bending regions, the elastic modulus of the buffer layer 11B located in the second and third non-bending regions can be equal to the elastic modulus of the hard region 11B01.

[0379] When the elastic modulus of the buffer layer 11B located in the second and third non-bending regions is less than the elastic modulus of the hard region 11B01 but greater than the elastic modulus of the soft region 11B02, a buffer material can be coated first, at which point its modulus is lower. Then, it can be cross-linked by local UV curing or heating. By controlling the UV energy or heating temperature, a portion with a lower modulus and a portion with a higher modulus can be obtained.

[0380] FIG. 52 This is a structural diagram of another display cover plate 113 or protective layer 114 provided in the embodiments of this application. It includes a substrate 11D and a buffer layer 11B, which are connected by an adhesive layer 11C.

[0381] In this example, the buffer layer 11B includes a hard portion 11B11 with a higher elastic modulus and a soft portion 11B12 with a lower elastic modulus, which are joined together. The hard portion 11B11 is located in a first non-bending region, and the soft portion 11B12 is located in at least one of the first bending region and the second bending region.

[0382] In some examples, such as FIG. 52 The hard part 11B11 and the soft part 11B12 can be joined together using an adhesive layer 11B13. For example, when an adhesive layer 11C is applied to one side of the buffer layer 11B, the adhesive can overflow into the gap between the hard part and the soft part, thereby bonding the hard part and the soft part together.

[0383] See FIG. 52In order to improve the rigidity of the second non-bending area and the third non-bending area, the elastic modulus of the buffer layer 11B located in the second non-bending area and the third non-bending area can be equal to the elastic modulus of the hard part.

[0384] In some other examples, the elastic modulus of the buffer layer 11B located in the second non-bending area and the third non-bending area can be less than the elastic modulus of the hard part and greater than the elastic modulus of the soft part.

[0385] In some examples, the material of the hard part 11B11 can be selected from at least one of polyethylene terephthalate (PET), transparent polyimide (CPI), and the like. The material of the soft part 11B12 can be selected from at least one of thermoplastic polyurethane elastomer TPU, thermoplastic polyamide elastomer TPAE, and the like. FIG. 53 In some examples, the material of the hard part 11B11 can be selected from at least one of polyethylene terephthalate (PET), transparent polyimide (CPI), and the like. The material of the soft part 11B12 can be selected from at least one of thermoplastic polyurethane elastomer TPU, thermoplastic polyamide elastomer TPAE, and the like.

[0386] FIG. 54 Fig. 13 is another structure diagram of a display cover plate 113 or a protective layer 114 according to an embodiment of the present application. The buffer layer 11B includes a first buffer layer 11B1 and a second buffer layer 11B2. The first buffer layer 11B1 includes a hard area 11B01 with a larger elastic modulus and a soft area 11B02 with a smaller elastic modulus. In the second buffer layer 11B2, the thickness of the part located in the first bending area is designed as a non-uniform thickness structure. This embodiment combines the non-uniform thickness design and the elastic modulus design of the buffer layer.

[0387] When the display module is in a folded state and the first non-bending area is exposed, the first bending area connecting the first non-bending area and the second non-bending area needs to have sufficient resistance to external force impact. For example, when the folded electronic device falls, the first bending area may be damaged by the impact of the hinge mechanism located on one side and the ground.

[0388] Some new display modules 11 are given according to embodiments of the present application, such as FIG. 55 A buffer pad 127 is arranged on the side of the support plate 111 away from the display screen 112, and the buffer pad 127 is arranged at a position opposite to the first bending area of the support plate 111.

[0389] In some examples, in order to improve the bendable performance of the support plate 111, a hollow structure 111a (which can be referred to as bamboo book) is opened in the part opposite to the first bending area, and the buffer pad 127 is arranged at a position opposite to the hollow structure 111a.

[0390] The buffer pad 127 can be a film structure or a film structure with more layers.

[0391] For example, the cushion 127 can be made of at least one of stainless steel (SUS), thermoplastic polyurethane elastomer (TPU), porous foam, PET film, and the like.

[0392] FIG. 56 FIG. 13 is another structural diagram of a display module according to an embodiment of the present application. In this embodiment, the cushion 127 is arranged on the hinge mechanism 200 on one side of the display module.

[0393] FIG. 54 to FIG. 56 FIG. 13 is another structural diagram of a display module according to an embodiment of the present application. In this embodiment, the cushion 127 is arranged on the hinge mechanism 200 on one side of the display module.

[0394] As shown in FIG. 12, the display cover plate 113 on the first bending area is designed to have a non-uniform thickness. FIG. 57 Due to the inclusion of the cushion 127, when the first bending area is impacted by an external force, the cushion 127 can reduce the degree of damage to the display module.

[0395] FIG. 58 FIG. 14 is another structural diagram of a display module according to an embodiment of the present application. In this structure, not only is the display cover plate 113 on the first bending area designed to have a non-uniform thickness, but also a cushion 127 is arranged on the side of the support plate 111 away from the display screen 112. This not only improves the rigidity of the exposed non-bending portion, but also does not weaken the bendability of the bending portion, and can reduce the damage to the bending portion of the display module, thereby improving the performance of the display module.

[0396] In some other examples, each region of the protective layer 114 can be designed to have a non-uniform thickness.

[0397] As shown in FIG. 12, the display cover plate 113 on the first bending area is designed to have a non-uniform thickness. FIG. 4A In addition, the cushion 127 is arranged on the support plate 111 opposite the first bending area. This not only optimizes the bendability of the bending portion of the display module, but also improves the impact resistance and extrusion resistance of the bending portion.

[0398] The design of the cover plate 110 as a non-uniform thickness or a non-uniform modulus structure according to the embodiments of the present application can be applied to the thinning scheme of the entire machine according to any of the above embodiments.

[0399] In some examples, the hinge mechanism in the folded electronic device adopts the structure shown in FIG. 15 and FIG. 16, and the cover plate in the display module of the electronic device can adopt a non-uniform thickness or a non-uniform modulus structure. FIG. 4B FIG. 25 In some examples, the hinge mechanism in the folded electronic device adopts the structure shown in FIG. 15 and FIG. 16, and the cover plate in the display module of the electronic device can adopt a non-uniform thickness or a non-uniform modulus structure.​

[0400] In some examples, the edge bending area of the display screen of the display module in the folded electronic device has a reinforcing layer, or a reinforcing layer, or a buffer layer. The cover plate in the display module in the electronic device can adopt an unequal thickness structure, or an unequal modulus structure.

[0401] In yet some examples, when the cover plate in the display module in the electronic device adopts an unequal thickness structure, or an unequal modulus structure, the above-mentioned FIG. 26 and ​ structures can be adopted.

[0402] In some examples, when the cover plate in the display module in the electronic device adopts an unequal thickness structure, or an unequal modulus structure, the electromagnetic induction structure 125 in the display module can adopt the above-mentioned examples.

[0403] In the description of this specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0404] The above is merely 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 easily think of 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. An electronic device, characterized in that, include: Display module; A hinge mechanism is provided on the side of the display module away from the display surface; The rotating shaft mechanism includes: The system comprises a first door panel, a second door panel, and a drive device, wherein the first door panel and the second door panel are respectively connected to the drive device. The driving device can drive the first door panel and the second door panel to move towards each other or away from each other, so that the display module switches between a flattened state and a closed state along the bending line. The display module moves from the flattened state to the closed state, the movement of the first door panel is a rotation along the first axis, and the movement of the second door panel includes both movement and rotation along the second axis. Both the first axis and the second axis are parallel to the bending line; the second door panel has opposing first and second ends; The display module is in the flattened state, the first door panel and the second door panel are located in the first plane, and the first end of the second door panel is closer to the first door panel than the second end. The display module is in the closed state, the first door panel is perpendicular to the first plane, and the second end of the second door panel is closer to the first door panel than the first end.

2. The electronic device according to claim 1, characterized in that, The drive device includes a first gear structure and a second gear structure, wherein the first gear structure meshes with the second gear structure. The first gear structure is connected to the first door panel, and the second gear structure is connected to the second door panel; The transmission ratio between the first gear structure and the second gear structure is less than 1.

3. The electronic device according to claim 2, characterized in that, The first gear structure includes: a first rocker arm and a first gear; One end of the first rocker arm is fixedly connected to the first gear, and the other end is fixedly connected to the first door panel; The second gear structure includes: a second rocker arm, a second gear, and a third gear; One end of the second rocker arm is fixedly connected to the second gear, and the other end is slidably connected to the second door panel. The second gear meshes with the third gear, and the third gear meshes with the first gear. The diameter of the first gear is larger than the diameter of the second gear.

4. The electronic device according to claim 3, characterized in that, The driving device also includes a sliding structure; The second door panel is slidably connected to the second rocker arm via the sliding structure; The sliding structure includes a slide groove and a slide rail disposed within the slide groove. One of the slide groove and the slide rail is disposed on the second door panel, and the other is disposed on the second rocker arm.

5. The electronic device according to any one of claims 1-4, characterized in that, The pivot mechanism also includes a middle door panel, with the first door panel and the second door panel disposed opposite each other on both sides of the middle door panel; The display module is in a flattened state, and the first door panel, the middle door panel, and the second door panel are located in the same plane; When the display module is in the closed state, the first door panel is perpendicular to the middle door panel.

6. The electronic device according to any one of claims 1-4, characterized in that, The display module includes a display screen and a support plate disposed on the side of the display screen away from the display surface; The first door panel and the second door panel are disposed on the side of the support plate away from the display screen; The area of ​​the support plate opposite to the second door panel is provided with a first hollow structure, and the area of ​​the support plate opposite to the first door panel is not provided with a hollow structure, or the area of ​​the support plate opposite to the first door panel is provided with a second hollow structure, and the density of the first hollow structure is greater than the density of the second hollow structure.

7. The electronic device according to claim 6, characterized in that, The first hollow structure includes: Multiple slots, each of which extends in the same direction as the second axis.

8. The electronic device according to claim 6, characterized in that, The rotating shaft mechanism also includes a middle door panel, with the first door panel and the second door panel disposed opposite each other on both sides of the middle door panel; The area of ​​the support plate opposite to the middle door panel is provided with a third hollow structure; the density of the third hollow structure is greater than the density of the first hollow structure.

9. The electronic device according to claim 6, characterized in that, The display module also includes: A cover plate is disposed on one side of the display surface of the display screen. The cover plate includes a first non-bending area, a second non-bending area, a third non-bending area, a first bending area, and a second bending area. The first bending area connects the first non-bending area and the second non-bending area, and the second bending area connects the second non-bending area and the third non-bending area. Both the first bending area and the second bending area can be bent along a bending line to switch between a flattened state and a closed state. The position of the rotating shaft mechanism corresponds to the first bending area; The thickness of the first non-bending region is not equal to the thickness of the second non-bending region.

10. The electronic device according to claim 9, characterized in that, The thickness of the first non-bending region is greater than the thickness of the second non-bending region.

11. The electronic device according to claim 10, characterized in that, The cover plate includes: A substrate and a first buffer layer, wherein the first buffer layer is closer to the display screen than the substrate; The thickness of the substrate located in the first non-bending region is greater than the thickness of the substrate located in the second non-bending region, and / or; The thickness of the first buffer layer located in the first non-bending region is greater than the thickness of the first buffer layer located in the second non-bending region.

12. The electronic device according to claim 11, characterized in that, From the first non-bending region to the second non-bending region, the thickness of the first buffer layer located in the first bending region gradually decreases.

13. The electronic device according to claim 11, characterized in that, The cover plate includes: The second buffer layer includes a first part and a second part; The first part of the second buffer layer is located in the first non-bending region, and the second part of the second buffer layer is located in the first bending region. The elastic modulus of the first part of the second buffer layer is greater than that of the second part of the second buffer layer.

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