Display module and electronic equipment

Abstract

The embodiment of the invention provides a display module and electronic equipment comprising the display module. Relates to the technical field of display. The electronic device can be thinned. The electronic equipment comprises a display module and a rotating shaft mechanism, wherein the rotating shaft mechanism is arranged on one side, far away from a display surface, of the display module; the rotating shaft mechanism comprises a first door plate, a second door plate and a driving device, and the driving device can drive the first door plate and the second door plate to move oppositely or oppositely and drive the display module to be switched between a flattened state and a closed state; the display module moves from a flattened state to a 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. The thickness of the whole machine in the folded state is reduced by changing the motion trail of the first door plate.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and an electronic device including the display module. Background Art

[0002] With the development of human-computer interaction technology, display has become an important element of human-computer interaction. Therefore, foldable screen electronic devices have come into being, such as foldable mobile phones.

[0003] As user experience improves, the requirements for foldable electronic devices are getting higher and higher. For example, the non-bending part has higher rigidity, the bending part has better bendability, and the thickness of the electronic device is thinner.

[0004] When electronic devices are in a closed state, the thickness of the whole device is relatively thin, which is a problem that users are more concerned about. In some existing technologies, it is possible to reduce the thickness of the display module and the shell by other technical means, but the degree of thinning is very small. Therefore, how to reduce the thickness of foldable electronic devices in a closed state is still one of the problems faced. Summary of the invention

[0005] The present application provides a display module and an electronic device including the display module, such as a foldable electronic device, for the purpose of reducing the thickness of the foldable electronic device in a closed state.

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

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

[0008] The electronic device includes a display module and a hinge mechanism, which is arranged on a side of the display module away from the display surface; the hinge mechanism includes: a first door panel, a second door panel and a driving device, the first door panel and the second door panel are both connected to the driving device, and the driving device can drive the first door panel and the second door panel to move toward or away from each other, so that the display module switches between a flattened state and a closed state; when the display module moves from the flattened state to the closed state, the movement of the first door panel is a rotation along a first axis, and the movement of the second door panel includes movement and rotation along a second axis; the first axis and the second axis are both parallel to the bending line.

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

[0010] In one achievable manner, the second door panel has a first end and a second end relative to each other; when the display module is in a flattened state, the first door panel and the second door panel are located in a first plane, and the first end of the second door panel is closer to the first door panel than the second end; when the display module is in a 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.

[0011] In one achievable manner, the driving device includes a first gear structure and a second gear structure, the first gear structure is meshed 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.

[0012] The example of the present application adopts a gear meshing transmission mechanism to realize the rotation of the first door panel and the second door panel, and the transmission ratio of the first gear structure and the second gear structure is less than 1, so that the rotation speed of the first door panel can be smaller than the rotation speed of the second door panel. Under the same rotation time, the rotation angle of the first door panel is smaller than the rotation angle of the second door panel, so that when the first door panel is perpendicular to the middle door panel, the second door panel is inclined relative to the middle door panel.

[0013] In one achievable manner, 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 first rocker arm is fixedly connected to the second gear, and the other end is slidably connected to the second door panel, the second gear is meshed with the third gear, and the third gear is meshed with the first gear; the diameter of the first gear is greater than the diameter of the second gear.

[0014] When the diameter of the first gear is greater than the diameter of the second gear, the rotation speed of the first door panel can be lower than the rotation speed of the second door panel.

[0015] In one achievable manner, the driving device also includes a sliding structure; the second door panel is slidably connected to 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 panel, and the other is arranged on the second rocker arm.

[0016] The sliding structure can be used to allow the second door panel to move while rotating.

[0017] In one achievable manner, the hinge mechanism also includes a middle door panel, and the first door panel and the second door panel are relatively arranged on both sides of the middle door panel; when the display module is in a flattened state, 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 a closed state, the first door panel is perpendicular to the middle door panel.

[0018] In one achievable method, the display module includes a display screen, a support plate arranged on the side of the display screen away from the display surface; a first door panel and a second door panel are arranged on the side of the support plate away from the display screen; and a first hollow structure is arranged in the area opposite to the support plate and the second door panel.

[0019] In order to adapt to the rotation and movement of the second door panel, a first hollow structure is provided in the area of ​​the support plate opposite to the second door panel to ensure that the display module has high bendability.

[0020] In one achievable manner, no hollow structure is provided in the area where the support plate is opposite to the first door panel.

[0021] In this implementation structure, since the movement of the first door panel is a rotational movement, a hollow structure may not be provided at the position of the support plate corresponding to the first door panel.

[0022] In one achievable manner, a second hollow structure is provided in a region of the support plate opposite to the first door panel; and the density of the first hollow structure is greater than the density of the second hollow structure.

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

[0024] In one achievable manner, the hinge mechanism also includes a middle door panel, and the first door panel and the second door panel are relatively arranged on both sides of the middle door panel; a third hollow structure is arranged in the area opposite to the middle door panel; and the density of the third hollow structure is greater than the density of the first hollow structure.

[0025] In one achievable manner, the first hollow structure includes: a plurality of slots parallel to the second axis; the plurality of slots include a first group of slots and a second group of slots, the first group of slots and the second group of slots being 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] By arranging a plurality of slots alternately, the bendability of the portion of the display module corresponding to the second door panel can be further improved.

[0027] In one achievable method, the display module also includes a cover plate, which is arranged on one side of the display surface of the display screen, and 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, the second bending area connects the second non-bending area and the third non-bending area, and 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 hinge 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 an unequal thickness structure. For example, in some scenarios, in order to improve the rigidity of the first non-bending area exposed in the closed state (to present the image to the user), when the thickness of the first non-bending area is increased, the unequal thickness design of the cover plate basically does not affect the bendability of the first bending area due to the increase in the thickness of the first non-bending area.

[0029] The display module provided in the present application not only has higher rigidity in the non-bending region, but also has better bendability in the bending region.

[0030] In one achievable manner, the thickness of the first non-bending region is greater than the thickness of the second non-bending region.

[0031] In the cover plate, the thickness of the first non-bending area corresponding to the first non-bending portion is greater than the thickness of the second non-bending area corresponding to the second non-bending portion. 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 one achievable manner, the cover plate includes 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 may be designed to have unequal thickness.

[0034] In one achievable manner, the thickness of the first buffer layer located in the first bending region gradually decreases from the first non-bending region to the second non-bending region.

[0035] In one achievable manner, the cover plate includes a second buffer layer, 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 area, the second part of the second buffer layer is located in the first bending area, and 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 bendability of the bending area, the second buffer layer may be designed to have a structure with unequal elastic moduli.

[0037] In a second aspect, the present application provides a hinge mechanism, which is used in a foldable electronic device. The hinge mechanism is arranged on a side of a display module of the electronic device away from a display surface. The hinge mechanism includes: a first door panel, a second door panel and a driving device. The first door panel and the second door panel are both connected to the driving device. The driving device can drive the first door panel and the second door panel to move toward or away from each other, so that the display module switches between a flattened state and a closed state along a bending line; the display module moves from a flattened state to a closed state, the movement of the first door panel is a rotation along a first axis, and the movement of the second door panel includes movement and rotation along a second axis; the first axis and the second axis are both parallel to the bending line.

[0038] The movement of the first door panel in the hinge mechanism of the present application is rotation. For example, when the display module is in a closed state, the first door panel can be perpendicular to the middle door panel. The movement of the second door panel includes rotation and movement. For example, when the display module is in a closed state, the second door panel can be tilted relative to the middle door panel. Compared with the first door panel and the second door panel both including rotation and movement, the thickness of the whole machine in the folded state can be reduced.

[0039] In one achievable manner, the second door panel has a first end and a second end relative to each other; when the display module is in a flattened state, the first door panel and the second door panel are located in a first plane, and the first end of the second door panel is closer to the first door panel than the second end; when the display module is in a 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.

[0040] In one achievable manner, the driving device includes a first gear structure and a second gear structure, the first gear structure is meshed 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.

[0041] The example of the present application adopts a gear meshing transmission mechanism to realize the rotation of the first door panel and the second door panel, 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 panel can be lower than the rotation speed of the second door panel.

[0042] In one achievable manner, 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 first rocker arm is fixedly connected to the second gear, and the other end is slidably connected to the second door panel, the second gear is meshed with the third gear, and the third gear is meshed 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 panel can be lower than the rotation speed of the second door panel.

[0044] In one achievable manner, the driving device also includes a sliding structure; the second door panel is slidably connected to 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 panel, and the other is arranged on the second rocker arm.

[0045] The sliding structure can be used to allow the second door panel to move while rotating.

[0046] In one practicable manner, the hinge mechanism further includes a middle door panel, and the first door panel and the second door panel are relatively arranged 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.

[0047] In the third aspect, the present application provides a display module, which includes a display screen, the display screen includes a display area, an edge bending area located at the outer edge of the display area, and a lower frame area connected to the edge bending area, and the lower frame area is located on the side of the display area away from the display surface; the display module also includes a base film and an adhesive layer, the base film and the adhesive layer are arranged on the outside of the edge bending area, the base film is connected to the edge bending area through the adhesive layer, or; the display module also includes a reinforcement layer, the reinforcement layer is arranged on the outside of the edge bending area, the reinforcement layer includes a printed layer; 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 involved in the present application, the reinforcement layer disposed on one side of the edge bending area of ​​the display screen includes a base film, and the base film is bonded to the edge bending area through an adhesive layer, that is, the present application adopts a lamination process, which is easy to control the thickness of the adhesive layer compared to the glue coating process, and can achieve a narrow frame. Alternatively, the reinforcement layer is made by printing technology, such as inkjet printing technology, which can produce a thinner reinforcement layer to compress the frame size and achieve a narrow frame.

[0049] In one achievable manner, the thickness of the reinforcement layer is 1 um-30 um.

[0050] In one achievable manner, the display module further includes a reinforcement layer, which is disposed on the inner side of the edge bending region; the inner side of the edge bending region is a side of the edge bending region close to the center of the arc structure.

[0051] By combining the reinforcement layer and the enhancement layer, the strength of the edge bending area can be further improved.

[0052] In one achievable manner, when the display module includes a base film and an adhesive layer, the elastic modulus of the reinforcement layer is smaller than the elastic modulus of the base film; when the display module includes a reinforcement layer, the elastic modulus of the reinforcement layer is smaller than the elastic modulus of the reinforcement layer.

[0053] This can prevent the reinforcement layer from affecting the bendability of the edge bending area.

[0054] In one achievable manner, the material of the reinforcement layer includes at least one of polyurethane, acrylate, silicone resin or epoxy resin.

[0055] In one achievable method, the display module further includes a buffer layer, which is disposed on a side of the base film away from the edge bending region, and the elastic modulus of the buffer layer is smaller than the elastic modulus of the base film; or the buffer layer is disposed on a side of the reinforcement layer away from the edge bending region, and the elastic modulus of the buffer layer is smaller than the elastic modulus of the reinforcement layer.

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

[0057] In one achievable manner, the material of the buffer layer includes at least one of polyurethane, acrylate or silicone.

[0058] In a fourth aspect, the present application provides an electronic device, which includes a display module and a shell, the shell including a frame arranged at the edge of the display module, and a first filling layer is arranged at a position where the frame and the display surface of the display module are in contact; the frame and the first filling layer are an integrally molded structure.

[0059] In the electronic device provided in the present application, since the first filling layer used to fill between the frame and the display module is an integrally formed structural component with the frame, in the assembly process, compared with assembling the first filling layer separately, there will be no fitting tolerance between the frame and the first filling layer. During the design, there is no need to reserve a fitting tolerance, so the size of the frame can be compressed to achieve the lightweight and thin electronic device.

[0060] In one achievable manner, the frame and the first filling layer are an integrally formed injection-molded structural component.

[0061] For example, an injection molding process may be used to manufacture an integrated frame and a first filling layer.

[0062] In one achievable manner, a second filling layer is disposed at a position of the frame opposite to a side surface of the display module, and an elastic modulus of the second filling layer is smaller than an elastic modulus of the frame.

[0063] When the electronic device is in use, the amount of movement of the display module also needs to be considered. Therefore, there is an avoidance gap between the side of the display module and the frame. The example of this application uses a second filling layer with a smaller elastic modulus to be set at a position of the frame opposite to the side of the display module. In this way, the second filling layer is used to play a buffering role, so that the size of the avoidance gap between the display module and the frame can be compressed to compress the size of the entire machine.

[0064] In one practicable manner, the second filling layer and the frame are integrally formed, which can simplify the assembly process.

[0065] In one achievable manner, the frame and the second filling layer are an integrally formed injection-molded structural component.

[0066] In a fifth aspect, the present application provides a display module, which includes a display screen, a support plate and an electromagnetic induction structure, wherein the electromagnetic induction structure is arranged on the support plate, and 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 includes: a stacked first sensing electrode layer and a second sensing electrode layer, and a first insulating layer, wherein the stacking direction of the first sensing electrode layer and the second sensing electrode layer is consistent with the stacking direction of the display screen and the display cover plate; the first insulating layer is stacked between the first sensing electrode layer and the second sensing electrode layer,

[0067] In the display module involved in the present application, the electromagnetic induction structure is directly formed on the support plate. Compared with the example of bonding the electromagnetic induction structure to the support plate with an adhesive layer, the adhesive layer can be omitted, and the thickness of the display module can be thinned, so that 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 80μm to 107μm to about 5μm. In this way, the thickness of the entire display module is significantly compressed, and the bendability of the display module is improved.

[0068] In one achievable manner, the support plate is made of insulating material; the first sensing electrode layer is arranged on the surface of the support plate; the electromagnetic induction structure further includes a flat layer, which is arranged on a side of the second sensing electrode layer away from the first insulating layer and covers the second sensing 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 insulating material, the first sensing electrode layer is directly stacked on the support plate.

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

[0071] In this embodiment, since the support plate is made of a conductive material, in order to prevent the support plate from affecting the sensing electrodes, an insulating layer is provided between the support plate and the first sensing electrode layer.

[0072] In one achievable manner, the display module further includes a back protection layer, which is disposed on the back side of the display screen; and the flat layer is connected to the back protection layer via an adhesive layer.

[0073] In a sixth aspect, the present application provides a display module, which includes a display screen, an electromagnetic induction structure and a support plate, wherein 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 includes: a substrate, a first sensing electrode layer, a second sensing electrode layer, a first flat layer and a second flat layer, the first sensing electrode layer is arranged on one side of the substrate, the second sensing electrode layer is arranged on the other side of the substrate, the first flat layer covers the first sensing electrode layer, the first flat layer is arranged on one side of the support plate through the first adhesive layer, the second flat layer covers the second sensing electrode layer, and the second flat layer is connected to the back of the display screen through the 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 includes a substrate and induction electrode layers located on opposite sides of the substrate. In this way, compared with the existing display module including a back protection layer (arranged on the back side of the display screen), the present application can omit the back protection layer to reduce the thickness of the entire display module and improve the bendability of the display module.

[0075] In one achievable manner, the material of the substrate includes 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 housing and a display module in any of the above-mentioned implementations, and the display module is arranged on the housing.

[0077] The electronic device provided in the embodiment of the present application includes the above-mentioned display module. Therefore, the electronic device provided in the embodiment of the present application and the display module of the above-mentioned technical solution can solve the same technical problems and achieve the same expected effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 A structural diagram of a foldable electronic device;

[0079] Figure 2 A structural diagram of another foldable electronic device;

[0080] Figure 3 A structural diagram of a display module;

[0081] Figure 4A A schematic diagram of a remote motion trajectory of a door panel in a rotating shaft mechanism provided in an embodiment of the present application;

[0082] Figure 4B A schematic diagram of the structure of a door panel in a rotating shaft mechanism provided in an embodiment of the present application when the door panel is flattened;

[0083] Figure 5 It is a schematic diagram of the remote movement trajectory of a door panel in a rotating shaft mechanism;

[0084] Fig. 6A and Figure 6B A structural diagram of a driving device provided in an embodiment of the present application;

[0085] Figure 7 A structural diagram of the connection relationship between a second door panel and a second rocker arm provided in an embodiment of the present application;

[0086] Figure 8 A structural diagram of a support plate provided in an embodiment of the present application;

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

[0088] Fig.10 A structural diagram of a support plate provided in an embodiment of the present application;

[0089] Fig.11 A structural diagram of a support plate provided in an embodiment of the present application;

[0090] Fig.12 A structural diagram of a display screen in a display module when it is flattened;

[0091] Fig.13 A structural diagram of a display screen in a display module when it is bent;

[0092] Fig.14 A structural diagram of a display screen in a display module when it is bent;

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

[0094] Fig.16 A structural diagram of an enhancement layer provided in an embodiment of the present application;

[0095] Fig.17 A structural diagram of a display module provided in an embodiment of the present application;

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

[0097] Fig.19 A structural diagram of a display module provided in an embodiment of the present application;

[0098] Fig. 20 A structural diagram of a display module provided in an embodiment of the present application;

[0099] Fig.21 A structural diagram of a display module provided in an embodiment of the present application;

[0100] Fig. 22 A structural diagram of a display module provided in an embodiment of the present application;

[0101] Fig.23 A structural diagram of a display module provided in an embodiment of the present application;

[0102] Fig.24 A schematic diagram showing the connection relationship between a display module and a housing;

[0103] Fig.25 A schematic diagram of the connection relationship between a display module and a housing provided in an embodiment of the present application;

[0104] Fig.26 A schematic diagram of the connection relationship between a display module and a housing provided in an embodiment of the present application;

[0105] Fig. 27 A structural diagram of a housing provided in an embodiment of the present application;

[0106] Fig.28 A structural diagram of a display module including an electromagnetic induction structure;

[0107] Fig.29 A structural diagram of a display module including an electromagnetic induction structure provided in an embodiment of the present application;

[0108] Fig.30 A structural diagram of an electromagnetic induction structure provided in an embodiment of the present application;

[0109] Fig.31 A structural diagram of an electromagnetic induction structure provided in an embodiment of the present application;

[0110] Fig.32 A structural diagram of a display module including an electromagnetic induction structure provided in an embodiment of the present application;

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

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

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

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

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

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

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

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

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

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

[0121] Fig.43 A structural diagram of a multi-fold display module provided in an embodiment of the present application;

[0122] Fig.44 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0123] Fig.45 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0124] Fig.46 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0125] Fig.47 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0126] Fig.48 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0127] Fig.49 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0128] Fig.50 A structural diagram of a multi-fold display module in a flattened state provided in an embodiment of the present application;

[0129] Fig.51 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0130] Fig.52 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0131] Fig.53 A structural diagram of a multi-fold display module provided in an embodiment of the present application, in which a cover plate is in a flattened state;

[0132] Fig.54 A structural diagram of a multi-fold display module in a flattened state provided in an embodiment of the present application;

[0133] Fig.55 A structural diagram of a multi-fold display module in a flattened state provided in an embodiment of the present application;

[0134] Fig.56 A structural diagram of a multi-fold display module in a flattened state provided in an embodiment of the present application;

[0135] Fig.57 A structural diagram of a multi-fold display module in a flattened state provided in an embodiment of the present application;

[0136] Fig.58 A structural diagram of a multi-fold display module in a flattened state provided in an embodiment of the present application. DETAILED DESCRIPTION

[0137] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0138] An embodiment of the present application provides an electronic device, which may be a foldable electronic device.

[0139] The electronic device may include a mobile phone, a tablet computer (pad), a smart wearable product (e.g., a smart watch, a smart bracelet), a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and other electronic products with display functions. The embodiments of the present application do not impose any special restrictions on the specific form of the above-mentioned electronic devices with display functions.

[0140] For the convenience of explanation, the structure of the electronic device is described below by taking a mobile phone as an example.

[0141] Figure 1 A structural diagram of a folding screen mobile phone is shown, and the folding screen mobile phone of the example is a three-screen folding mobile phone. The three-folding screen mobile phone may include a first shell 100a, a second shell 100b and a third shell 100c, and a display module 11. The display module 11 may be continuously covered on the first shell 100a, the second shell 100b and the third shell 100c. The folding screen mobile phone may also include a first rotating shaft mechanism and a second rotating shaft mechanism.

[0142] The first shell 100a and the second shell 100b are arranged on both sides of the first hinge mechanism and are respectively connected to the first hinge mechanism. The first hinge mechanism can move so that the first shell 100a and the second shell 100b are relatively folded or relatively unfolded, thereby realizing the flattening and closing of the display module 11 arranged on the first shell 100a and the second shell 100b.

[0143] The second shell 100b and the third shell 100c are arranged on both sides of the second hinge mechanism and are respectively connected to the second hinge mechanism. The second hinge mechanism can move so that the second shell 100b and the third shell 100c are relatively folded or relatively unfolded, thereby realizing the flattening and closing of the display module 11 arranged on the second shell 100b and the third shell 100c.

[0144] Figure 2 The structure diagram of a dual-screen folding mobile phone is shown, and the folding mobile phone includes a first shell 100a, a second shell 100b, a display module 11 and a hinge mechanism. The display module 11 can be continuously covered on the first shell 100a and the second shell 100b, and the first shell 100a and the second shell 100b are arranged on both sides of the hinge mechanism and are respectively connected to the hinge mechanism. Under the action of the hinge mechanism, the display module 11 can also be flattened and closed.

[0145] A foldable electronic device can be unfolded to a flat state, or folded to a closed state, or in an intermediate state between the flat state and the closed state. A foldable electronic device has at least two states, namely, a flat state and a closed state. In some cases, a third state may be further included, which is an intermediate state between the flat state and the closed state. The intermediate state does not have only one state, and may be any one or more states between the flat state and the closed state of the electronic device.

[0146] Above Figure 1 and Figure 2 The examples are a three-screen and a dual-screen folding electronic device. The folding electronic device involved in the embodiments of the present application can also be a device with more screens, such as a four-screen folding electronic device, a five-screen folding electronic device, etc.

[0147] In electronic devices, the demand for thinning electronic devices is becoming more and more obvious. The following provides a variety of structures that can be implemented, for example, by compressing the frame size, thinning the display module size, etc., to make the whole device lighter and thinner. Specific embodiments are shown below.

[0148] In some examples, such as Figure 3 The display module 11 may include a support plate (bracket) 111 , a display screen (panel) 112 and a cover plate 110 .

[0149] The support plate 111 and the cover plate 110 are arranged on opposite sides of the display screen 112. The support plate 111 is located on the back side of the display screen 112 and serves as a supporting structure for supporting the display screen 112. The cover plate 110 is located on the display surface side of the display screen 112 and is used to protect the display screen 112 and reduce the probability of the display screen 112 being damaged.

[0150] Continue reading Figure 3 The cover plate 110 may include a display cover plate 113 and a protective layer 114. The display cover plate 113 is disposed on the display surface side of the display screen 112, and the protective layer 114 is disposed on the side of the display cover plate 113 away from the display screen 112. Both the display cover plate 113 and the protective layer 114 are light-transmissive. The light transmitted from the display surface of the display screen 112 can pass through the display cover plate 113 and the protective layer 114 and be received by the user.

[0151] In some usage scenarios, when the protective layer 114 is damaged or falls off, the display cover 113 can still protect the display screen 112 .

[0152] In the embodiment of the present application, the display screen (panel) 112 may be a flexible display screen, and the cover plate 110 may be a flexible structure to meet folding requirements.

[0153] In the above-mentioned folding electronic device such as a mobile phone, the display screen 112 can be used to display information and provide an interactive interface for the user. In various embodiments of the present application, the display screen 112 can be, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light emitting diode (QLED) display screen, etc.

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

[0155] Figure 3 In the figure, it is shown 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 side of the display screen 112. The display screen 112 is to be placed in a foldable electronic device. Correspondingly, the support plate 111 also includes a bending area and a non-bending area connected to the bending area.

[0156] like Figure 4A A hinge mechanism is provided on the side of the support plate 111 away from the display screen 112, and the display module including the display screen 112 and the support plate 111 can be flattened and closed by using the hinge mechanism.

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

[0158] In other examples, such as Figure 4A The hinge mechanism may further 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. The first door panel 202, the middle door panel 201 and the second door panel 203 support the display module 11.

[0159] In order to reduce the thickness of the electronic device when it is in a folded state.

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

[0161] exist Figure 4A and Figure 4B In the embodiment, the movement trajectory of the first door panel 202 is a rotation along the first axis. When the display module is in a closed state, the first door panel 202 is Figure 4A The illustrated surface is substantially perpendicular to the first plane. The first plane may be the plane where the first door panel 202 and the second door panel 203 are located when the display module is flattened.

[0162] like Figure 4A and Figure 4B , the movement of the second door panel 203 includes rotation and movement. Figure 4B In the embodiment, the second door panel 203 can rotate along a second axis, and the second axis is parallel to the first axis and parallel to the bending lines 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 the present application, when the display module is in a flattened state, the first door panel 202 and the second door panel 203 may be completely in one plane. In other examples, when the display module is in a flattened state, there may be a relatively small angle between the first door panel 202 and the second door panel 203, 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 one plane.

[0165] like Figure 4A The second door panel 203 has a first end and a second end opposite to each other. When in a flattened state, the first end is closer to the first door panel 202 than the second end. Figure 4A In the closed state shown (shown by dotted lines), 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 Figure 4A and Figure 4B When the movement shown is in motion, the display module is in a closed state, and a Figure 4AThe shape shown. The shape may be: the motion track of the portion of the display module opposite to the first door panel 202 is a bat track, and the motion track of the portion of the display module opposite to the second door panel 203 is a water drop track.

[0167] In some examples, such as Figure 5 As shown, the motion trajectories of the first door panel 202 and the second door panel 203 are substantially similar, including rotation around their axes and movement. Figure 5 The display module including the support plate 111 and the display screen 112 can form a nearly symmetrical teardrop shape in the bending area.

[0168] Combined with the embodiment of the present application Figure 4A and Figure 4B ,and Figure 5 In contrast, due to Figure 4A and Figure 4B The embodiment of the present application changes the movement mode of the first door panel 202, and on the basis of realizing the bending of the display module, the thickness of the entire device in the folded state is reduced.

[0169] In the example of the present application, the first door panel 202 and the second door panel 203 are respectively driven by the driving device to move toward or away from each other, so that the display module switches between the flattened state and the closed state.

[0170] The present application provides a drive device that can be implemented. Figure 4A As shown, in the closed state, the first door panel 202 is perpendicular to the first plane, and the second door panel 203 is inclined relative to the first plane.

[0171] like Fig. 6A and Figure 6B As shown, Fig. 6A and Figure 6B is a simplified structural diagram of the driving device provided in the embodiment of the present application. Fig. 6A The exemplary rotating shaft mechanism includes a first door panel 202 and a second door panel 203. Figure 6B The exemplary rotating shaft mechanism includes a first door panel 202 , a middle door panel 201 and a second door panel 203 .

[0172] Fig. 6A and Figure 6B The driving device shown includes: a first gear structure 30 and a second gear structure 40, the first gear structure 30 meshes with the second gear structure 40; the first gear structure 30 is connected to the first door panel 202, and the second gear structure 40 is connected to the second door panel 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. When the rotation time is the same, the rotation angle of the first door panel 202 is less than the rotation angle of the second door panel 203, so that the first door panel 202 can be realized as follows. Figure 4A When the second door panel 203 is perpendicular to the first plane, the second door panel 203 is inclined to the first plane. For example, the transmission ratio n can be 0.5 to 0.8, and for example, the transmission ratio n is equal to 0.6.

[0174] In some examples, such as Fig. 6A and Figure 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 to the first gear 302 , and the other end of the first rocker arm 301 is fixedly connected to the first door panel 202 .

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

[0176] The first gear 302 may be a complete circular gear structure, with meshing teeth arranged circumferentially of the circular structure; or the first gear 302 may be a Fig. 6A and Figure 6B As shown, part of the outer wall surface has meshing teeth to meet the rotation requirements.

[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 to the second gear 402, and the other end is slidably connected to the second door panel 203, the second gear 402 is meshed with the third gear 403, and the third gear 403 is meshed with the first gear 302.

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

[0179] The second gear 402 may also be a complete circular gear structure; or the first gear 302 may be Fig. 6A As shown, part of the outer wall surface has meshing teeth to meet the rotation requirements.

[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 may be a pitch circle diameter of the gear.

[0181] Since the diameter of the first gear 302 is larger than the diameter of the second gear 402, according to the inverse relationship between the transmission ratio and the pitch circle diameter, and the direct relationship between the transmission ratio and the rotation speed, it can be determined that when the rotation time is the same, the rotation angle of the first door panel 202 is smaller than the rotation angle of the second door panel 203, so that the first door panel 202 can be realized as follows: Figure 4AWhen perpendicular to the first plane as shown, the second door panel 203 is inclined to the first plane.

[0182] like Figure 6B When the driving device drives the first door panel 202 and the second door panel 203 to move, the middle door panel 201 can be stationary. When the display module is in a closed state, the bent portion of the display module is arranged in the space enclosed by the first door panel 202, the middle door panel 201 and the second door panel 203.

[0183] like Figure 6B In other examples, when the driving device drives the first door panel 202 and the second door panel 203 to move, the middle door panel 201 may move away from the display module to make more accommodation space for the bent display module. The device that drives the middle door panel 201 to move away from the display module may be a telescopic device, such as a telescopic spring, a telescopic cylinder, etc.

[0184] In this example, the second door panel 203 can rotate and slide. Figure 7 , Figure 7 The present application provides a sliding structure, wherein the second door panel 203 is slidably connected to the second rocker arm 401 through the sliding structure, and the sliding structure includes a slide groove 501 and a slide rail 502, wherein one of the slide groove 501 and the slide rail 502 is arranged on the second door panel 203, and the other is arranged on the second rocker arm 401. Figure 7 In the embodiment, the slide groove 501 is arranged on the second door panel 203 , and the slide rail 502 is arranged on the second rocker arm 401 .

[0185] In the embodiment of the present application, in order to adapt Figure 4A and Figure 4B The track shapes of the first door panel 202 and the second door panel 203 are shown. Figure 8 This is a partial structural diagram of a support plate 111 provided in an embodiment of the present application. A hollow structure 111A is provided at a position of the support plate 111 opposite to the middle door panel 201 (inner bending R zone), and a hollow structure 111B is provided at a position of the support plate 111 opposite to the second door panel 203 (first bending outer R zone).

[0186] In some embodiments of the present application, the position of the support plate 111 relative to the middle door panel 201 can be: when the display module is in a flattened state, the area where the orthographic projection of the middle door panel 201 on the support plate 111 is located, or it can include the area where the orthographic projection is located, and some areas outside the area.

[0187] See also Figure 8 , the position of the support plate 111 opposite to the first door panel 202 may not be provided with a hollow structure. Figure 4Aand Figure 4B In the structure shown, the first door panel 202 is in rotational motion, and the second door panel 203 includes a composite motion of rotational motion and movement. The display module including the support plate 111 can match the motion trajectory, showing Figure 4A Shape shown.

[0188] like Figure 8 The structure of the support plate 111 shown can not only ensure the bendability of the inner bending R zone, the first outer bending R zone and the second outer bending R zone, but also make the second outer bending R zone have sufficient flattening rigidity.

[0189] The hollow structure 111B may have various structures. Fig. 9 An exemplary structure of a hollow structure 111B is given, including a plurality of slots, each of which extends in a direction parallel to a bending line L (the bending line L is parallel to the first axis and the second axis involved 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 in a direction perpendicular to the bending line L, and the first group of slots and the second group of slots each include a plurality of slots, and the plurality of slots in the first group of slots and the plurality of slots in the second group of slots are arranged alternately. This allows the outer bending R zone to not only have sufficient bending performance, but also ensure its flattening stiffness.

[0190] like Figure 8 As shown, the density of the hollow structure 111A in the inner R region of the bend is greater than the density of the hollow structure 111B in the outer R region of the second bend.

[0191] In some embodiments of the present application, the density of the hollow structure may be: the area ratio of the hollow structure to the unit area of ​​the support plate 111. For example, the hollow structure includes a plurality of slots, and the spacing between two adjacent slots in the inner R zone of the bend is smaller than the spacing between two adjacent slots in the outer R zone of the second bend.

[0192] Fig.10 Shows Figure 8 The hollow structure 111A located in the inner R region of the bend penetrates the support plate 111, and the hollow structure 111B located in the outer R region of the second bend does not penetrate the support plate 111. For example, Fig.10 In the figure, the support plate 111 has a first surface and a second surface relative to each other, the hollow structure 111A penetrates from the first surface to the second surface, the hollow structure 111B is recessed from the first surface toward the second surface, and there is a gap between the bottom surface of the hollow structure 111B and the second surface.

[0193] In some examples, in order to improve the bendability of the second bending outer R zone, the first surface is closer to the second surface. Figure 4A The center of the arc structure is shown.

[0194] To adapt Figure 4A The movement trajectory of the first door panel 202 and the second door panel 203, Fig.11 This is another structure of the support plate 111 provided in the present application. A hollow structure 111A is provided in the inner bending R region, a hollow structure 111B is provided in the second outer bending R region, and a hollow structure 111C is provided in the first outer bending R region opposite to the first door panel 202; the density of the hollow structure 111C is less than that of the hollow structure 111B, and the hollow structure 111C and the hollow structure 111B are asymmetrically provided on both sides of the hollow structure 111A.

[0195] In some embodiments of the present application, the density of the hollow structure may be: the ratio of the area occupied by the hollow structure per unit area of ​​the support plate 111. For example, the hollow structure includes a plurality of slots, and the spacing between two adjacent slots in the first bend outer R zone is greater than the spacing between two adjacent slots in the second bend outer R zone.

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

[0197] Fig.12 and Fig.13 One of the packaging structures of the display driver chip DDIC is shown, and Fig.13 It is along Fig.12 This is a cross-sectional view taken along the MM direction. This packaging structure can be called a chip on panel (COP) packaging.

[0198] like Fig.12 and Fig.13 The edge portion 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 the embodiment includes: a bent portion and a non-bent portion connected to the bent portion. The bent portion and the non-bent portion connected to the bent portion are both used as display portions for displaying images to users. Fig.12 and Fig.13 The edge bending area BB and the lower frame area CC can both be used as non-display parts.

[0200] The display driver chip 13 is arranged on the lower frame area CC, and other electronic devices 14, such as a touch chip (TPIC), capacitors, resistors, etc., are integrated on a circuit board 12 electrically connected to the main circuit board, such as a flexible printed circuit (FPC). The circuit board 12 is connected to the lower frame area CC through an electrical connection structure 16 to achieve signal interconnection between the electronic devices 14 on the circuit board 12 and the display driver 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), which increases the stress of the wiring of the display screen 112, and easily causes wiring cracks, breakage and other undesirable phenomena under external impact.

[0202] In order to reduce the bending stress, the strength of the edge bending area BB is increased to cope with the situation where cracks occur during the bending process, the module or the whole machine under stress. 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 all be coated with glue using a piezoelectric ceramic spray valve to form a glue layer 15, and the metal wiring layer of the display screen 112 can be adjusted to a stress neutral layer. That is, the glue layer 15 is used to improve stress distribution and enhance the strength of the edge bending area BB to protect the display module from damage.

[0203] When performing glue coating, a thicker glue layer 15 is generally used, for example, Fig.14 , the thickness E of the glue layer 15 reaches about 90μm to ensure the protection effect, which will increase the frame size of the foldable electronic device. Due to the limitation of the glue coating process, there will be a large process tolerance. For example, the tolerance of the thickness E of the glue layer 15 is ±(20μm-30μm), which makes the thickness of the glue layer 15 uneven. Fig.14 As shown, the adhesive layer 15 on the display area AA side is thicker, while the adhesive layer 15 on the lower frame area CC side is thinner. In order to achieve a protective effect, a thicker adhesive layer 15 needs to be set, which will further increase the frame size.

[0204] In order to solve the problem that the thickness of the adhesive layer 15 involved in the above example is too thick, resulting in a widened frame size, the present application provides some embodiments, which can achieve a thinner adhesive layer and a narrow frame while ensuring the BB strength of the edge bending area and satisfying the protection effect. The achievable structure is shown below.

[0205] Fig.151 is 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] On the display surface side of the edge bending area BB, a reinforcement layer 1 is provided. Fig.16 As shown, Fig.16 It is a structural diagram of the reinforcement layer 1 given in an embodiment of the present application, wherein the reinforcement layer 1 includes a base film 110A and an adhesive layer 110B. The base film 110A is bonded to the outside of the edge bending area BB through the adhesive layer 110B. It can be that: the reinforcement layer 1 is arranged on the side of the edge bending area BB away from the arc center.

[0207] compared to 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 laminating process to protect the edge bending area BB.

[0208] Fig.15 and Fig.16 In the example shown, due to the use of a bonding process, the thickness of the reinforcing layer 1 can be effectively controlled while ensuring the BB strength of the edge bending area, and the thickness of the edge bending area of ​​the display module can be controlled to achieve a narrow frame.

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

[0210] There are many materials that can be selected for the base film 110A, for example, at least one of polyethylene terephthalate (PET), polyimide (PI), and transparent polyimide (CPI) can be selected.

[0211] In some other examples, the elastic modulus of the adhesive layer 110B in the reinforcement layer 1 may be smaller than the elastic modulus of the base film 110A. For example, the elastic modulus of the adhesive layer 110B may be 150 MPa-2 GPa.

[0212] There are also many materials that can be selected for the adhesive layer 110B, such as pressure-sensitive adhesive, curing adhesive, etc.

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

[0214] In preparation Fig.16 When the reinforcement layer 1 is shown, the adhesive layer 110B can be processed on the base film 110A by blade coating, roller coating, slit coating, etc.

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

[0216] In the feasible process, Fig.16 The reinforcement layer 1 shown can be pre-laminated and then pressed. For example, it can be pre-pressed and pressed on the surface of the edge bending area BB by a low-pressure press head, and then attached by a higher-pressure press head (which can match a certain temperature) or a pressurized cavity (which can match a certain temperature).

[0217] When high pressure lamination is adopted, curing can be performed by matching the pressure with a certain temperature, for example, the curing method can be UV curing, heat curing, moisture curing, etc. Alternatively, after high pressure lamination, the reinforcing layer 1 can be irradiated with UV light (the wavelength of UV light can be 365nm, 395nm or 405nm, etc.) for curing, so that the adhesive layer 110B is cross-linked with the display screen to achieve the set curing rate, modulus, bonding strength and other characteristic requirements.

[0218] Fig.17 The example is to Fig.15 The structure diagram of the display screen 112 including the enhancement layer 1 when used in a display module. Fig.17 In the display module, a functional layer 120 (eg, a polarizing plate) and a display cover 113 are provided on one side of the display area AA of the display screen 112. The display cover 113 is provided on one side of the functional layer 120 via an optically transparent adhesive OCA124.

[0219] Fig.18 This is another structural diagram of a display screen 112 in a bent state provided in an embodiment of the present application. On the basis of ensuring the BB strength of the edge bending area and satisfying the protection effect, a thinner glue layer can be achieved to realize a narrow frame.

[0220] exist Fig.18 In the display screen 12, a reinforcing layer 1 is provided on the display surface side of the edge bending area BB. For example, the reinforcing layer 1 can be made by using a printing technology, such as an ink jet printing (IJP) method.

[0221] Fig.18 The elastic modulus of the material selected for the reinforcement layer 1 is relatively large, for example, it may be 1 GPa-15 GPa. For example, the elastic modulus may be greater than or equal to 10 GPa.

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

[0223] When a material with a large elastic modulus is selected and the reinforcing layer 1 is made by the inkjet printing (IJP) method, the thickness of the reinforcing layer 1 can be 1um-30um. For example, it can be 3um-20um. This can significantly reduce the thickness of the reinforcing layer 1 and further narrow the frame size.

[0224] Fig.18 Examples of materials that can be selected for the reinforcement layer 1 include polyurethane, acrylate, silicone resin, epoxy resin, and the like.

[0225] In preparation Fig.18 When the structure is shown, an inkjet printing device can be used to print a high modulus IJP material, and then a curing method (UV curing, heat curing, moisture curing, etc.) can be used to cure the inkjet printed material. If UV curing is used, the inkjet printed material can be irradiated with UV light (the wavelength of the UV light can be 365nm, 395nm or 405nm, etc.) to cure the colloid cross-linking to achieve the set curing rate, modulus, bonding strength and other characteristic requirements.

[0226] Fig.19 The example is to Fig.18 The structure diagram of the display screen 112 including the enhancement layer 1 when used in a display module. Fig.19 In the display module, a functional layer 120 (e.g., a polarizer) and a display cover plate 113 are provided on one side of the display area AA of the display screen 112, and the display cover plate 113 is provided on one side of the functional layer 120 through an optically transparent adhesive OCA124. After the edge bending area BB is bent, some film layer structures are stacked in the area between the display area AA and the lower frame area CC. For example, the stacked film layer structures include a support plate 111 and a screen support layer 123. The screen support layer 123 is connected to the display area AA of the display screen 112 through a filling layer 121, and the support plate 111 is connected to the lower frame area CC of the display screen 112 through a filling layer 122.

[0227] Fig. 20 This is a structural diagram of a display module in a bent state given in an embodiment of the present application. On the basis of ensuring the BB strength of the edge bending area and satisfying the protection effect, a thinner glue layer can be achieved to achieve a narrow frame.

[0228] Fig. 20 In the display screen 112 of the display module shown, not only is the reinforcing layer 1 provided on the display surface side of the edge bending area BB, but a reinforcing layer 17 is also provided on the back side of the edge bending area BB.

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

[0230] The materials, elastic modulus, preparation methods, etc. of the base film 110A and the adhesive layer 110B can be selected by referring to the above Fig.15 and Fig.16 The examples shown are not described in detail here.

[0231] Fig. 20 The elastic modulus of the material selected for the reinforcement layer 17 is smaller than the elastic modulus of the base film 110A. For example, the elastic modulus of the material selected for the reinforcement layer 17 is ≥5 MPa. In addition, the elongation at break of the reinforcement layer 17 is ≥100%, and the bonding strength is ≥1 MPa.

[0232] In this embodiment, by disposing a reinforcement layer 17 on one 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] The strength of the edge bending area BB can be further improved by cooperating with the reinforcement layer 1 and the reinforcement layer 17. The use of the reinforcement layer 17 with a small elastic modulus will basically not affect the bendability of the edge bending area BB. The reinforcement layer 17 is arranged on the side of the display screen 112 close to the center of the arc structure, and will not increase the thickness of the edge bending area BB of the display module, and will not increase the frame size.

[0234] The reinforcement layer 17 involved in the embodiment of the present application may be made of materials including polyurethane, acrylate, silicone resin or epoxy resin.

[0235] In preparation Fig. 20 When the structure shown in the figure is used, the above Fig.16 In the structure shown in the figure, how to set the base film 110A and the adhesive layer 110B on the display surface side of the edge bending area BB of the display screen 112, Fig. 20 The reinforcement layer 1 is shown.

[0236] Adhesive glue can be applied on the back side of the edge bending area BB to obtain a reinforcement layer 17. The amount of glue in the reinforcement layer 11 can be accurately calculated through the inner arc space to adjust the amount of glue and the filling state. UV delayed curing or UV pre-curing, as well as moisture absorption curing, can be used to cross-link the colloid to achieve the set curing rate, modulus, bonding strength and other characteristic requirements.

[0237] Fig.21 This is another structural diagram of a display module in a bent state provided in an embodiment of the present application. Fig. 20Similarly, while ensuring the BB strength of the edge bending area and satisfying the protection effect, the glue layer can also be thinner to achieve a narrow frame.

[0238] Fig.21 The structure shown and Fig. 20 The difference between the structures shown is that: Fig. 20 In the embodiment, the display surface side of the edge bending area BB of the display screen 112 is provided with: a reinforcing layer 1 including a base film 110A and an adhesive layer 110B; Fig.21 In the embodiment, the reinforcing layer 1 is made of a material with a large elastic modulus and is prepared by an inkjet printing (IJP) method.

[0239] Fig.21 The structure shown and Fig. 20 The same thing about the structures shown is that not only is a reinforcing layer 1 provided on the display surface side of the edge bending region BB of the display screen 112 , but a reinforcement layer 17 is also provided on the back side of the edge bending region BB.

[0240] Fig. 22 This is a structural diagram of another display module in a bent state provided in an embodiment of the present application. This embodiment can also achieve a thinner adhesive layer and a narrow frame.

[0241] like Fig. 22 A reinforcing layer 1 is provided on the display surface side of the edge bending area BB of the display screen 112. The reinforcing layer 1 is made of a material with a large elastic modulus and is made by an inkjet printing IJP method. In addition, a buffer layer 18 is also provided on the side of the reinforcing layer 1 away from the display screen 112.

[0242] The elastic modulus of the buffer layer 18 is smaller 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 bonding strength is ≥5 MPa.

[0243] The thickness of the reinforcement layer 1 may be 1 um-30 um, for example, 3 um-20 um.

[0244] The thickness of the buffer layer 18 may be 1 um to 50 um, for example, 5 um to 30 um.

[0245] In this embodiment, since the reinforcing layer 1 made by the inkjet printing IJP method is relatively thin, the frame size will not be widened after adding the buffer layer 18, and the buffer layer 18 and the reinforcing layer 1 made by the inkjet printing IJP method can further enhance the strength of the edge bending area BB. The use of the buffer layer 18 with a smaller elastic modulus can also ensure the bendability of the edge bending area BB.

[0246] There are many materials that can be selected for the buffer layer 18. For example, it can be polyurethane, acrylate or silicone resin.

[0247] Fig.23 This is another structural diagram of a display module in a bent state provided in an embodiment of the present application. This embodiment can also achieve a thinner adhesive layer and a narrow frame.

[0248] Fig.23 The structure shown and Fig. 22 The same structure is that a reinforcement layer 1 and a buffer layer 18 are provided on the display surface side of the edge bending area BB of the display screen 112 , and the reinforcement layer 1 is closer to the display screen 112 than the buffer layer 18 .

[0249] Fig.23 The structure shown and Fig. 22 The structural differences shown include: Fig. 22 In the embodiment, the reinforcing layer 1 is made by inkjet printing (IJP). Fig.23 In the embodiment, 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 stacked in sequence along a direction away from the display screen 112 .

[0250] In a feasible process, after the reinforcing layer 1 is prepared on the display surface side of the edge bending area BB of the display screen 112, a dispensing process can be used, or a buffer layer can be prepared by an inkjet printing process, and the buffer layer can be cured. The curing method is UV curing, and the film part is irradiated with UV light (the wavelength of the UV light can be 365nm, 395nm or 405nm, etc.) to cure the colloid, so as to cross-link the colloid and achieve the set curing rate, modulus, bonding strength and other characteristic requirements.

[0251] In preparation Figures 17 to 23 When the display module is shown, a functional layer 120 can be firstly set on one side of the display surface of the display screen 112, for example, a polarizing film can be set; then a reinforcement layer 1 can be set in the edge bending area BB of the display screen 112, or a reinforcement layer 17 can be set; then the display screen 112 is cut; then a display driver chip DDIC and a touch chip TPIC, etc. are set in the lower frame area CC of the display screen 112, and a circuit board 12 can be connected; and then other film layer structures can be stacked.

[0252] In foldable electronic devices, such as Fig.24 As shown, a foam glue 20 is arranged between the frame 102 (also referred to as a small A shell) of the folded shell 100 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.

[0253] In some examples, the foam adhesive 20 is attached between the frame 102 and the display module 11 through an adhesive. The assembly tolerance of the foam adhesive 20, the avoidance space between the display module 11 and other structural parts, and the displacement of the display module 11 when it is bent are considered.

[0254] like Fig.24 As shown, there are at least the following factors: the fitting tolerance d of the foam glue 20 on the frame 102, the distance a between the outer end surface of the display module 11 and the frame 102, and the effective overlap width c of the foam glue 20 and the display module 11. In some electronic devices, such as mobile phones, a1 = 1.1 mm, c1 = 0.45 mm, d1 = 0.25 mm, so a1 + c1 + d1 = 1.8 mm, which will make the frame width of the electronic device (such as Fig.24 The S-direction dimension) is wider, which reduces the screen-to-body ratio and affects the appearance of the entire machine.

[0255] In order to compress the width of the frame, the embodiments of the present application provide some achievable structures as follows:

[0256] like Fig.25 As shown, Fig.25 This is the positional relationship between the frame 102, the middle frame 101, the display module 11 and the first filling layer 601 shown in the embodiment of the present application. The frame 102 and the first filling layer 601 are an integrally formed structure. For example, the frame 102 and the first filling layer 601 in an integral structure can be made by an insert molding process, such as a two-color insert molding process.

[0257] like Fig.25 A first filling layer 601 is disposed at a position where the frame 102 of the housing 100 is in contact with the display surface of the display module 11. The first filling layer 601 and the frame 102 are integrally formed structural parts.

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

[0259] For example, the material of the first filling layer 601 can be selected from at least one of silicone and thermoplastic polyurethanes (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 an integrally formed structure, there will be no Fig.24 The fitting tolerance d between the frame 102 and the foam adhesive 20 is shown. During the design, there is no need to reserve a fitting tolerance, and the width dimension S of the frame can be compressed.

[0261] In order to further reduce the width S of the frame 102 , the side S1 of the first filling layer 601 away from the outer edge of the electronic device is flush with the side S2 of the frame 102 away from the outer edge of the electronic device, thereby reducing the width of the frame.

[0262] In some embodiments of the present application, the side surface S1 being flush with the side surface S2 may mean that the side surface S1 and the side surface S2 are located in the same plane.

[0263] like Fig.26 There is an avoidance gap between the display module 11 and the frame 102, and the foldable electronic device has a jumping amount and a rubbing amount when folded, so that there is a distance a1 between the outer end surface of the display module 11 and the frame 102. In order to prevent the display module from hitting the middle frame 102 when in use, the size of the distance a1 is also relatively large, which is also the main factor leading to the large frame width.

[0264] In order to reduce the influence of this factor on the border width, Fig.26 , Fig.26 This is the positional relationship between the frame 102, the middle frame 101, the display module 11 and the first filling layer 601 shown in the embodiment of the present application. 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 smaller than that of the frame 102.

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

[0266] When the display module 11 is along Fig.26 When the display module 11 moves in the Q direction, it may hit the second filling layer 602 with a smaller elastic modulus. Since the second filling layer 602 has a smaller elastic modulus than the frame 102, it can buffer the display module 11 and reduce the probability of damage to the display module 11.

[0267] Can be reduced Fig.26 The distance between the outer end surface of the display module 11 and the frame 102 can further compress the width dimension S of the frame.

[0268] The second filling layer 602 and the frame 102 may be an integrally formed structure. In some selectable processes, the second filling layer 602 and the frame 102 may be formed integrally by insert molding (such as a two-color injection molding process), so that the assembly process can be simplified.

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

[0270] See also Fig.26 When the frame 102 structure including the first filling layer 601 and the second filling layer 602 is adopted, compared with the above Fig.24 , the effective overlap width b2 between the first filling layer 202 and the display module 11, and Fig.24 The effective overlap width c1 of the foam glue 20 and the display module 11 is 0.45 mm. Fig.26 In the embodiment, the distance between the outer end surface of the first filling layer 601 and the frame 102 is a2=0.85, Fig.26 The size a2+b2=1.3mm, compared to Fig. 22 , the width of one side of the frame 102 can be compressed from 0.3 mm to 0.5 mm.

[0271] like Fig. 27 When the four sides of the frame 102 are all made of the above Fig.26 When the structure is shown, 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-to-body ratio will be significantly improved, the product refinement will be improved, and the user experience will be improved.

[0272] Folding electronic devices are being used in more and more scenarios. For example, devices with larger displays are used in business office operations, and the demand for styluses is becoming increasingly strong.

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

[0274] like Fig.28 As shown, Fig.28The structure diagram of the display module is shown. The display module 11 includes: a display screen (panel) 112, a display cover (cover) 113, and a back protective layer 116. The display cover 113 is arranged on the display surface side of the display screen 112, and the display cover 113 is light-transmissive. The light transmitted by the display surface of the display screen 112 can pass through the display cover 113 and be received by the user; the back protective layer 116 is arranged on the back side of the display screen 112, and is used to support and protect the display screen 112; the display cover 113 and the back protective layer 116 are connected to the display screen 112 through an adhesive layer to form the core layer structure of the display module.

[0275] Fig.28 When preparing the display module shown, an independent plate-shaped electromagnetic induction structure 125 is disposed between the support plate 111 and the back protection layer 116 , and connected to the back protection layer 116 via an adhesive layer 1 , and connected to the support plate 111 via an adhesive layer 2 .

[0276] Fig.28 In the structure shown, the thickness of the electromagnetic induction structure 125 is substantially 80 μm to 107 μm, and the thickness of the adhesive layer 1 and the adhesive layer 2 are respectively 25 μm to 30 μm, which makes the thickness of the entire display module larger and reduces the bendability of the display module.

[0277] In order to reduce the thickness of the display module and improve the bendability of the display module, the embodiments of the present application provide some display module structures including electromagnetic induction structures, as described below.

[0278] Fig.29 1 is a schematic diagram of a structure of a display module 11 provided in an embodiment of the present application. The display module 11 of this example includes a display screen 112 , a display cover plate 113 , a back protection layer 116 , a support plate 111 and an electromagnetic induction structure 125 .

[0279] exist Fig.29 In the embodiment, 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.30 and Fig.31 These are two different implementation structures of the electromagnetic induction structure 125 provided in the embodiments of the present application.

[0281] exist Fig.30 When the support plate 111 is made of a conductive material, for example, 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, a first insulating layer 1253 is provided between the first sensing electrode layer 1251 and the support plate 111. The first insulating layer 126 is used to electrically isolate the sensing electrode from the conductive support plate 111 to ensure the working performance of the sensing electrode.

[0283] The first sensing electrode layer 1251 is disposed on a side of the first insulating layer 1253 away from the support plate 111, and the first sensing electrode layer 1251 is disposed on a surface of the first insulating layer 1253 away from the support plate 111. The second sensing electrode layer 1252 is stacked with the first sensing electrode layer 1252, 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 disposed on the surface of the second insulating layer 1254.

[0284] like Fig.30 The electromagnetic induction structure 125 further includes a flat layer 1255, and the flat layer 1255 covers the second sensing electrode layer 1252. The flat layer 1255 can not only protect the second sensing electrode 1252, but also improve the surface flatness and reduce the phenomenon of magic mark on the display module.

[0285] Will Fig.30 The structure shown is applied in Fig.29 When the display module 11 is shown, 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, a back protective layer 116 is provided on the back side of the display screen 112, and the flat layer 1255 is bonded to the back protective layer 116 through the adhesive layer 1.

[0286] Fig.29 and Fig.30 The display module shown is the same as the above Fig.28 Compared with the display module shown in the figure, the adhesive layer 2 with a thickness of 25 μm to 30 μm is omitted, thereby compressing the thickness of the entire display module.

[0287] Since the electromagnetic induction structure 125 is directly disposed on the support plate 111, the thickness of the electromagnetic induction structure 125 is Fig.29 The thickness of the entire display module is significantly reduced, which improves the bendability of the display module.

[0288] In the feasible process, the following method can be used to prepare Fig.29 and Fig.30 Display module on display.

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

[0290] Step 2: a first sensing electrode layer 1251 is disposed on a side of the first insulating layer 1253 away from the support plate 111. For example, the patterned first sensing electrode layer 1251 may be manufactured by coating etching or printing.

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

[0292] Step 4: a second sensing electrode layer 1252 is provided on a side of the second insulating layer 1254 away from the first sensing electrode layer 1251. For example, the patterned second sensing electrode layer 1252 may be manufactured by coating etching or printing.

[0293] Step 5: Dispose a planar layer 1255 so that the second sensing electrode layer 1252 is covered by the planar layer 1255 .

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

[0295] Step 7: Connect the support plate 111 carrying the electromagnetic induction structure 125 to the multilayer film structure obtained in step 6. For example, the back protection layer 116 and the flat layer 1255 are bonded together using the adhesive layer 1.

[0296] like Fig.31 As shown, Fig.31 This is another implementation structure of the electromagnetic induction structure given in the embodiment of the present application. In this example, the support plate 111 is made of insulating material, for example, carbon fiber or the like.

[0297] Since the support plate 111 in this example is made of 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 planar layer 1255 .

[0298] The first sensing electrode layer 1251 is disposed on the surface of the support plate 111, and the second sensing electrode layer 1252 is stacked on a side of the first sensing electrode layer 1252 away from the support plate 111. 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 disposed on the surface of the second insulating layer 1254.

[0299] Will Fig.31 The structure shown is applied in Fig.29 In the display module 11 shown in FIG. 1 , 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, a back protective layer 116 is provided on the back side of the display screen 112, and the flat layer 1255 is bonded to the back protective layer 116 through the adhesive layer 1.

[0300] like Fig.30 and Fig.31 , and the above Fig.28 Compared with the display module shown in the figure, the adhesive layer 2 with a thickness of 25 μm to 30 μm is omitted, thereby compressing the thickness of the entire display module.

[0301] Since the electromagnetic induction structure 125 is directly disposed on the support plate 111 and an insulating layer is omitted, the thickness of the electromagnetic induction structure 125 is Fig.29 The thickness of the entire display module is significantly reduced, which improves the bendability of the display module.

[0302] In the feasible process, the following method can be used to prepare Fig.29 and Fig.31 Display module on display.

[0303] Step 1: Form a first sensing electrode layer 1251 on one side of the support plate 111. For example, the patterned first sensing electrode layer 1251 may be formed by coating etching or printing.

[0304] Step 2: Dispose the second insulating layer 1254 so that the second insulating layer 1254 covers the first sensing electrode layer 1251 .

[0305] Step 3: a second sensing electrode layer 1252 is provided on a side of the second insulating layer 1254 away from the first sensing electrode layer 1251. For example, the patterned second sensing electrode layer 1252 may be manufactured by coating etching or printing.

[0306] Step 4: Dispose a planar layer 1255 so that the second sensing electrode layer 1252 is covered by the planar layer 1255 .

[0307] Step 5: Prepare the stacked display screen 112, display cover plate 113 and back protection layer 116.

[0308] Step 6: Connect the support plate 111 carrying the electromagnetic induction structure 125 to the multilayer film structure obtained in step 5. For example, the back protection layer 116 and the flat layer 1255 are bonded together using the adhesive layer 1.

[0309] In order to reduce the thickness of the display module and improve its bendability, Fig.32 This is another structure that can be implemented by a display module given in an embodiment of the present application.

[0310] like Fig.32 The display module includes: a display screen 112 and a display cover 113. The display cover 113 is arranged on one side of the display surface of the display screen 112.

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

[0312] Fig.33 The display can be applied in Fig.32 The electromagnetic induction structure 125 includes a first induction electrode layer 1251 , a second induction electrode layer 1252 , a substrate 1256 , a first planar layer 1257 and a second planar layer 1258 .

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

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

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

[0316] like Fig.33 and Fig.32 , and the above Fig.28 Compared with the display module shown in the figure, the back protection 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. In addition, the thickness of the electromagnetic induction structure 125 in this example is 40 μm to 60 μm, for example, 50 μm. Fig.28 The electromagnetic induction structure has a thickness of 80 μm to 107 μm, and the embodiment of the present application Fig.32 and Fig.33 The display module shown can significantly reduce the thickness and improve the bendability of the display module.

[0317] compared to Fig.28 The adhesive layer 1 can also be omitted, which can further compress the thickness and optimize the bending performance.

[0318] In the feasible process, the following method can be used to prepare Fig.32 and Fig.33 Display module on display.

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

[0320] Step 2: Use the adhesive layer 3 to bond the second flat layer 1258 to the display screen 112 , and a display cover plate 113 may be provided on one side of the display surface of the display screen 112 .

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

[0322] like Fig.34 and Fig.35 , Fig.34 FIG. 1 shows a structural diagram of the first sensing electrode layer 1251. Fig.35 The structure of the second sensing electrode layer 1252 is shown. The electrodes in the first sensing electrode layer 1251 can extend along the X direction, and two adjacent electrodes are connected to form a current loop; the electrodes in the second sensing electrode layer 1252 can extend along the Y direction, and two adjacent electrodes are connected to form a current loop.

[0323] Among some selectable materials, the electrodes in the first sensing electrode layer 1251 or the electrodes in the second sensing electrode layer 1252 may be selected from but not limited to at least one of copper, aluminum, iron, tungsten, gold, and silver, and may also be alloy materials.

[0324] The planar layer may be made of an insulating material, such as an organic insulating material.

[0325] In the above-mentioned foldable electronic device, it is shown how to reduce the size of the whole device. In order to further improve the product performance, it is also necessary to improve the impact resistance and external force damage resistance of the non-bending area and improve the bendability of the bending area.

[0326] The present 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 This is a structural diagram of a display module provided in an embodiment of the present application. The display screen 112 in the display module 11 includes: a first non-bending portion, a second non-bending portion, a third non-bending portion, a first bending portion, and a second bending portion; the first bending portion connects the first non-bending portion and the second non-bending portion, and the second bending portion connects the second non-bending portion and the third non-bending portion.

[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 portion of the display screen 112 corresponds to the first non-bending area of ​​the cover plate 110, the first bending portion of the display screen 112 corresponds to the first bending area of ​​the cover plate 110, the second non-bending portion of the display screen 112 corresponds to the second non-bending area of ​​the cover plate 110, the second bending portion of the display screen 112 corresponds to the second bending area of ​​the cover plate 110, and the third non-bending portion of the display screen 112 corresponds to the third non-bending area of ​​the cover plate 110.

[0330] The first bending region, the first bending portion, the second bending region and the second bending portion can all be bent along a bending line to switch between a flattened state and a closed state.

[0331] Fig.36 Take the three-screen folding as an example. In other examples, you can Fig.36 Based on the structure shown, more bending areas and non-bending areas are added to form electronic devices such as four-screen folding and five-screen folding.

[0332] like Fig.36 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 thickness d1 is not equal to the thickness d2. For example, the thickness d1 may be greater than the thickness d2.

[0333] Fig.37 is a structural diagram of another display module provided in an embodiment of the present application. Fig.36Similarly, 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 thickness d1 is not equal to the thickness d2, and the thickness d1 is greater than the thickness d2.

[0334] Fig.38 is a structural diagram of another display module provided in an embodiment of the present application. Fig.36 and Fig.37 Similarly, in the cover plate 110 , the thickness d1 of the first non-bending area is not equal to the thickness d2 of the second non-bending area, and the thickness d1 is greater than the thickness d2 .

[0335] The thickness dimension involved in the embodiment of the present application refers to: Fig.36 The dimension along the stacking direction (P direction) of multiple film layers.

[0336] Fig.36 , Fig.37 and Fig.38 In the three different examples of the display module 11 shown, the thickness d4 of the first bending area of ​​the cover plate 110 is not constant, but gradually decreases along the direction away from the first non-bending area, that is, from the first non-bending area to the second non-bending area, so that the thickness d2 is smaller than the thickness d1.

[0337] like Figure 36 to Figure 38 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 connected between the first non-bending area and the second non-bending area is a thin-to-thick transition area.

[0338] Fig.36 , Fig.37 and Fig.38 The three different examples of the display module 11 shown have the following differences:

[0339] Fig.36 In the cover plate 110, the thickness of the second bending area is d5, the thickness of the third non-bending area is d3, and the thickness d2, the thickness d5 and the thickness d3 are equal. The first non-bending area is a thick area, the first bending area is a thick-thin transition area, and the second non-bending area, the second bending area and the third non-bending area are thin areas with equal thickness.

[0340] and the above Fig.36 compared to, Fig.37 In the example shown, not only the thickness d4 of the first bending area is not a constant value, but also the thickness d2 of the second non-bending area is not a constant value. In some examples, the thickness of the first bending area and the second non-bending area of ​​the cover plate 110 gradually decreases in the direction away from the first non-bending area, which can cover up the visual effect of the uneven thickness of the entire display module.

[0341] exist Fig.37 In the embodiment, the thickness of the second bending area and the third non-bending area of ​​the cover plate 110 are equal, that is, the thickness d5 is equal to the thickness d3.

[0342] exist Fig.37 In the embodiment, the first non-bending region is a thick region, the first bending region and the second non-bending region are thick-thin transition regions, and the second bending region and the third non-bending region are thin regions with equal thickness.

[0343] and the above Fig.36 and Fig.37 In comparison, Fig.38 In the embodiment, not only the thickness of the first bending area and the second non-bending area of ​​the cover plate 110 is not constant, but also the thickness of the second bending area and the third non-bending area of ​​the cover plate 110 is not constant. Along the direction away from the first non-bending area, the thickness of the first bending area, the second non-bending area, the second bending area and the third non-bending area of ​​the cover plate 110 gradually decreases. This can further cover up the visual effect of the uneven thickness of the entire display module.

[0344] Fig.39 Yes Fig.36 The structural diagram of the display module 11 after bending given in the embodiment of the present application. The thickness of the first non-bending area that is exposed (visible to the user when folded) is greater than the thickness of the second non-bending area that is not exposed (invisible to the user when folded). The first bending area connected to the exposed first non-bending area is designed to be an unequal thickness structure. Even if the thickness of the first non-bending area is increased in order to improve the rigidity and strength of the first non-bending area, the bendability of the bending area will not be affected. The thickness of other areas will not be increased, and when the whole machine is in a folded state, the thickness of the folded state will not be significantly increased.

[0345] In some examples, the above Figure 36 to Figure 38 The bending area of ​​the example may form an inner bending area, or may form an outer bending area. Fig.39 In the folded state shown, the first bending area forms an outer bending area, and the second bending area forms an inner bending area. The first non-bending area is exposed and visible to the user, and the second non-bending area and the third non-bending area are opposite and invisible to the user.

[0346] like Fig.40 , Fig.40 This is a structural diagram of a display module provided in an embodiment of the present application. The thickness of the display cover plate 113 located in the first non-bending area is greater than the thickness located in the second non-bending area, and the thickness of the display cover plate 113 located in the first bending area gradually decreases in the direction away from the first non-bending area.

[0347] exist Fig.40In the embodiment, the thickness of the protection layer 114 in each bending region and each non-bending region is equal.

[0348] Fig.40 This is another structural diagram of a display module provided in an embodiment of the present application. In this structure, the thickness of the protective layer 114 located in the first non-bending area is greater than the thickness located in the second non-bending area, and the thickness of the protective layer 114 located in the first bending area gradually decreases in the direction away from the first non-bending area.

[0349] exist Fig.41 In the figure, the thickness of the cover plate 113 in each bending area and each non-bending area is equal.

[0350] Fig.42 is a structural diagram of another display module provided in an embodiment of the present application. Fig.41 In comparison, in this structure, along the direction away from the first non-bending area, the thickness of the first bending area and the thickness of the second non-bending area in the protective layer 114 gradually decrease, thereby widening the width of the thin-to-thick transition zone of the protective layer 114.

[0351] Fig.43 is a structural diagram of another display module provided in an embodiment of the present application. Fig.41 and Fig.42 In contrast, in this example, in the protective layer 114, the thickness of the first bending region, the thickness of the second non-bending region, the thickness of the second bending region, and the thickness of the third non-bending region gradually decrease in the direction away from the first non-bending region, further widening the width of the thin-thick transition zone of the protective layer 114.

[0352] Above Figure 41 to Figure 43 In the embodiment, the protective layer 114 is designed as a structure with uneven thickness. In other examples, the uneven thickness transition zone can be set in other film layer structures, for example, in the display cover plate 113, Figure 41 to Figure 43 The structure shown.

[0353] In some examples provided in this application, Fig.44 , the display cover 113 or the protective layer 114 may include: a substrate 11D and a buffer layer 11B.

[0354] The substrate 11D and the buffer layer 11B may be connected via an adhesive layer 11C, and the adhesive layer 11A connects the stacked film layer structures to other layer structures. 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 113 by using the adhesive layer 11A.

[0355] Among some selectable materials, the substrate 11D may 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 elastomeric film material, and the elastic modulus of the buffer layer 11B is smaller than the elastic modulus of the substrate 11D. The buffer layer 11B can be made of at least one of elastomeric film materials such as thermoplastic polyurethane elastomer TPU and thermoplastic polyamide elastomer TPAE.

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

[0358] See also Fig.44 In this embodiment, the buffer layer 11B located in the first bending region is designed as a structure of unequal thickness. Along the direction away from the first non-bending region, the thickness of the buffer layer 11B located in the first bending region gradually decreases, so that the protective layer 114 or the display cover plate 113 located in the first bending region is a thick-thin transition zone.

[0359] exist Fig.44 In the embodiment, the thickness of the substrate 11D may be 25 μm to 75 μm, and the thickness of the adhesive layer 11A and the adhesive layer 11C may be 25 μm to 50 μm.

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

[0361] Fig.45 This is another structural diagram of a display cover plate 113 or a protective layer 114 provided in an embodiment of the present application. In this example, the substrate 11D located in the first bending region is designed to have a structure of unequal thickness. Along the direction away from the first non-bending region, the thickness of the substrate 11D located in the first bending region gradually decreases, so that the protective layer 114 or the display cover plate 113 located in the first bending region is a thick-thin transition zone.

[0362] Fig.46 1 is another structural diagram of a display cover plate 113 or a protective layer 114 provided in an embodiment of the present application. Fig.44In comparison, not only the buffer layer 11B located in the first bending area is designed as a structure with unequal thickness, but also the buffer layer 11B located in the second non-bending area is designed as a structure with unequal thickness, so as to weaken the visual effect of uneven thickness of the entire display module.

[0363] Fig.47 1 is a structural diagram of another display cover plate 113 or protective layer 114 provided in 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 thick buffer layer, the strain generated on the upper and lower surfaces of the film material when the display module is bent is easy to enter the plastic deformation stage.

[0364] When the display module is bent, in order to weaken the strain generated on the upper and lower surfaces of the display module, the plastic deformation stage is entered to improve the bendability. In some examples, such as 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 equal thickness, and the second buffer layer 11B2 located in the first bending region is designed to be of unequal thickness. The second buffer layer 11B2 of uneven thickness is farther away from the display screen than the first buffer layer 11B1 of uniform thickness, that 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 uneven thickness.

[0365] See also Fig.47 The first buffer layer 11B1 is connected to the second buffer layer 11B2 via an adhesive layer 11E, and the second buffer layer 11B2 is connected to the substrate 11D via an adhesive layer 11C.

[0366] Fig.48 This is another structural diagram of a display cover plate 113 or a protective layer 114 provided in an embodiment of the present application. In some optional processes, a coating process can be used to bond the buffer layer 11B to the substrate 11D. The adhesive layer used to connect the buffer layer 11B and the substrate 11D can be removed to reduce the thickness of the entire display module without weakening the rigidity of the non-bending area and the bendability of the bending area.

[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] See also Fig.48 In this example, the buffer layer 11B located in the first bending region is designed to have an unequal thickness structure, and the thickness of each region of the substrate 11D is equal.

[0369] Fig.49This is another structural diagram of a display cover plate 113 or a protective layer 114 provided in an embodiment of the present application. In some optional processes, a coating process can also be used to bond the buffer layer 11B to the substrate 11D. The buffer layer 11B in this example can be made of a sticky material, such as an optically transparent adhesive OCA. The buffer layer 11B is not only an elastic film material, but also has a connecting function, so the adhesive layer 11A may not be required. The thickness of the display module can be further compressed.

[0370] See also Fig.49 In this example, the buffer layer 11B located in the first bending region is designed to have an unequal thickness structure, and the thickness of each region of the substrate 11D is equal.

[0371] In order to improve the rigidity of the exposed non-bending area without weakening the bendability of the bending area, the present application also provides some structures that can be implemented, as follows:

[0372] Fig.50 1 is a structural diagram of a display module provided in an embodiment of the present application. In the cover plate 110 of the display module 11, the elastic modulus in the first non-bending area is greater than the elastic modulus in 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 set in at least one of the display cover plate and the protective layer. Fig.50 1 is a structural diagram of a display cover plate 113 or a protective layer 114 provided in an embodiment of the present application, including a substrate 11D and a buffer layer 11B, wherein the substrate 11D and the buffer layer 11B are connected via an adhesive layer 11C.

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

[0375] exist Fig.51 In the embodiment, the hard region 11B01 and the soft region 11B02 are connected together as an integral structure. In some optional process steps, the buffer layer material can be first coated on the substrate, and then cured by UV (ultraviolet light) in different regions to obtain buffer materials with different hardness; in other optional process steps, the buffer layer material can be heated in different regions to obtain parts with different elastic moduli to obtain hard regions and soft regions.

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

[0377] exist Fig.51 In the embodiment, the elastic modulus of the buffer layer 11B (which may be called the third part) located in the second non-bending area and the third non-bending area may be smaller than the elastic modulus of the hard area 11B01 and larger than the elastic modulus of the soft area 11B02.

[0378] In some examples, in order to improve the stiffness of the second non-bending region and the third non-bending region, the elastic modulus of the buffer layer 11B located in the second non-bending region and the third non-bending region may 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 non-bending area and the third non-bending area is smaller than the elastic modulus of the hard area 11B01 and larger than the elastic modulus of the soft area 11B02, the buffer material can be first coated, at which time its modulus is lower, and then cross-linked by local UV curing or heating, and a lower modulus part and a higher modulus part can be obtained by controlling the UV energy or heating temperature.

[0380] Fig.52 It is a structural diagram of another display cover plate 113 or protective layer 114 provided in an embodiment of the present application, including a substrate 11D and a buffer layer 11B, wherein the substrate 11D and the buffer layer 11B are connected via an adhesive layer 11C.

[0381] In this example, the buffer layer 11B includes a hard part 11B11 with a larger elastic modulus and a soft part 11B12 with a smaller elastic modulus, which are spliced ​​together. The hard part 11B11 is located in the first non-bending area, and the soft part 11B12 is located in at least one of the first bending area and the second bending area.

[0382] In some examples, such as Fig.52 , the hard part 11B11 and the soft part 11B12 can be spliced ​​together by using the adhesive layer 11B13. For example, when the adhesive layer 11C located on one side of the buffer layer 11B is coated, the colloid 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 also Fig.52In order to improve the rigidity of the second non-bending region and the third non-bending region, the elastic modulus of the buffer layer 11B located in the second non-bending region and the third non-bending region may 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 region and the third non-bending region may be smaller than the elastic modulus of the hard portion and larger than the elastic modulus of the soft portion.

[0385] exist Fig.52 In the example, the material that can be selected for the hard part 11B11 includes at least one of polyethylene terephthalate (PET), transparent polyimide (CPI), etc. The material that can be selected for the soft part 11B12 includes at least one of thermoplastic polyurethane elastomer TPU, thermoplastic polyamide elastomer TPAE, etc.

[0386] Fig.53 This is another structural diagram of a display cover plate 113 or a protective layer 114 provided in 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 region 11B01 with a larger elastic modulus and a soft region 11B02 with a smaller elastic modulus. In the second buffer layer 11B2, the thickness of the portion located in the first bending region is designed to be an unequal thickness structure. This embodiment combines the unequal thickness design of the buffer layer with the unequal elastic modulus design.

[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 impact. For example, when the folded electronic device falls, the first bending area may be damaged by the impact of the hinge mechanism on one side and the ground.

[0388] The embodiments of the present application provide some novel display modules 11, such as Fig.54 A buffer pad 127 is provided on a side of the support plate 111 away from the display screen 112 , and the buffer pad 127 is provided at a position of the support plate 111 opposite to the first bending area.

[0389] In some examples, in order to improve the bendability of the support plate 111, a hollow structure 111a (which may be called a bamboo book) is provided in a portion opposite to the first bending area, and a buffer pad 127 is provided at a position opposite to the hollow structure 111a.

[0390] The buffer pad 127 may be a one-layer film structure, or a multi-layer film structure.

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

[0392] Fig.55 1 is a structural diagram of another display module provided in an embodiment of the present application. In this embodiment, the buffer pad 127 is disposed in the support plate 111. For example, a groove may be provided in the support plate 111, and the buffer pad 127 may be disposed in the groove, and the groove is located at a position opposite to the first bending area.

[0393] Fig.56 1 is a structural diagram of another display module provided in an embodiment of the present application. In this embodiment, the buffer pad 127 is arranged on the rotating shaft mechanism 200 located on one side of the display module.

[0394] like Figure 54 to Figure 56 Since the buffer pad 127 is included, when the first bending area is impacted by external force, the buffering effect of the buffer pad 127 can reduce the degree of damage to the display module.

[0395] Fig.57 1 is a structural diagram of another display module provided in an embodiment of the present application. In this structure, not only is the display cover plate 113 located in the first bending area designed to be a structure of unequal thickness, but a buffer pad 127 is also provided on the side of the support plate 111 away from the display screen 112. This can not only improve the rigidity of the exposed non-bending part, but also not weaken the bendability of the bending part, and can also reduce the degree of damage to the bending part of the display module, thereby improving the performance of the display module.

[0396] In some other examples, various regions of the protection layer 114 may be designed to have structures of unequal thickness.

[0397] like Fig.58 As shown, the cover plate (e.g., display cover plate, protective layer) located on the display surface side of the display screen 112 is designed as a structure with unequal elastic modulus. Also, the buffer pad 127 is arranged at a position of the support plate 111 opposite to the first bending area. This not only optimizes the bendability of the display module bending portion, but also improves the impact resistance and extrusion resistance of the bending portion.

[0398] The embodiment of the present application shows that the cover plate 110 is designed as a structure of unequal thickness or unequal modulus, which can be applied to the whole machine thinning solution involved in any of the above embodiments.

[0399] In some examples, the hinge mechanism in the foldable electronic device adopts Figure 4A and Figure 4B As shown in the structure, the cover plate in the display module of the electronic device can adopt an unequal thickness structure or an unequal modulus structure.

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

[0401] In some other examples, the cover plate in the display module of the electronic device can adopt a structure of unequal thickness or unequal modulus, and the above Fig.25 and Fig.26 The structure shown.

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

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

[0404] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An electronic device, characterized in that: include: Display module; A rotating shaft mechanism, wherein the rotating shaft mechanism is arranged on a side of the display module away from the display surface; The rotating shaft mechanism comprises: A first door panel, a second door panel and a driving device, wherein the first door panel and the second door panel are respectively connected to the driving device; The driving device can drive the first door panel and the second door panel to move toward 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 a first axis, and the movement of the second door panel includes movement and a rotation along a second axis; The first axis and the second axis are both parallel to the bending line.

2. The electronic device according to claim 1, characterized in that: 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 a 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.

3. The electronic device according to claim 1 or 2, characterized in that: The driving device comprises a first gear structure and a second gear structure, wherein the first gear structure is meshed 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; A transmission ratio between the first gear structure and the second gear structure is less than 1.

4. The electronic device according to claim 3, 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 is meshed with the third gear, and the third gear is meshed with the first gear; A diameter of the first gear is greater than a diameter of the second gear.

5. The electronic device according to claim 4, 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 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 panel, and the other is arranged on the second rocker arm.

6. The electronic device according to any one of claims 1 to 5, characterized in that: The rotating shaft mechanism further includes a middle door panel, wherein the first door panel and the second door panel are arranged on both sides of the middle door panel opposite to each other; 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 a closed state, the first door panel is perpendicular to the middle door panel.

7. The electronic device according to any one of claims 1 to 6, characterized in that: The display module includes a display screen and a support plate arranged on a side of the display screen away from the display surface; The first door panel and the second door panel are arranged on a side of the support plate away from the display screen; A first hollow structure is arranged in the area where the support plate and the second door panel are opposite, no hollow structure is arranged in the area where the support plate and the first door panel are opposite, or a second hollow structure is arranged in the area where the support plate and the first door panel are opposite, and the density of the first hollow structure is greater than the density of the second hollow structure.

8. The electronic device according to claim 7, characterized in that: The first hollow structure comprises: A plurality of slots are provided, and the extending direction of each slot is the same as the second axis.

9. The electronic device according to claim 7 or 8, characterized in that: The rotating shaft mechanism further includes a middle door panel, wherein the first door panel and the second door panel are arranged on both sides of the middle door panel opposite to each other; A third hollow structure is disposed in the area where the support plate is opposite to the middle door plate; the density of the third hollow structure is greater than that of the first hollow structure.

10. The electronic device according to any one of claims 7 to 9, characterized in that: The display module also includes: A cover plate, the cover plate is arranged on a display surface side 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, and 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.

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

12. The electronic device according to claim 11, characterized in that: The cover plate comprises: 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 in the first non-bending area is greater than the thickness of the substrate 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.

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

14. The electronic device according to claim 12 or 13, characterized in that: The cover plate comprises: a second buffer layer, the second buffer layer comprising a first portion and a second portion; The first portion of the second buffer layer is located in the first non-bending region, the second portion of the second buffer layer is located in the first bending region, and the elastic modulus of the first portion of the second buffer layer is greater than the elastic modulus of the second portion of the second buffer layer.

15. A display module, characterized in that: include: A display screen, comprising a display area, an edge bending area located at the outer edge of the display area, and a lower frame area connected to the edge bending area, wherein the lower frame area is located at a side of the display area away from a display surface; The display module further includes a base film and an adhesive layer, wherein the base film and the adhesive layer are arranged outside the edge bending region, and the base film is connected to the edge bending region through the adhesive layer, or; The display module further includes a reinforcement layer, the reinforcement layer is arranged outside the edge bending area, and the reinforcement layer includes a printed layer; The outer side of the edge bending region is a side of the edge bending region away from the center of the arc structure.

16. The display module according to claim 15, characterized in that: The display module also includes: A reinforcement layer, the reinforcement layer being arranged on the inner side of the edge bending area; The inner side of the edge bending region is a side of the edge bending region close to the center of the arc structure.

17. The display module according to claim 16, characterized in that: When the display module includes the base film and the adhesive layer, the elastic modulus of the reinforcement layer is smaller than the elastic modulus of the base film; or, When the display module includes the reinforcement layer, the elastic modulus of the reinforcement layer is smaller than the elastic modulus of the reinforcement layer.

18. The display module according to any one of claims 15 to 17, characterized in that: The display module also includes: A buffer layer, wherein the buffer layer is disposed on a side of the base film away from the edge bending region, and the elastic modulus of the buffer layer is smaller than the elastic modulus of the base film; or The buffer layer is arranged on a side of the reinforcement layer away from the edge bending region, and the elastic modulus of the buffer layer is smaller than the elastic modulus of the reinforcement layer.

19. The display module according to any one of claims 15 to 18, characterized in that: The display area includes a first non-bending portion, a second non-bending portion, a third non-bending portion, a first bending portion, and a second bending portion, wherein the first bending portion connects the first non-bending portion and the second non-bending portion, and the second bending portion connects the second non-bending portion and the third non-bending portion, and both the first bending portion and the second bending portion can be bent along a bending line to switch between a flattened state and a closed state; The display module also includes: A cover plate, the cover plate being arranged on a display surface side 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; The first non-bending region corresponds to the first non-bending portion, the second non-bending region corresponds to the second non-bending portion, the third non-bending region corresponds to the third non-bending portion, the first bending region corresponds to the first bending portion, and the second bending region corresponds to the second bending portion; The thickness of the first non-bending region is not equal to the thickness of the second non-bending region.

20. The display module according to claim 19, characterized in that: The thickness of the first non-bending region is greater than the thickness of the second non-bending region.

21. The display module according to claim 20, characterized in that: The cover plate comprises: 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 in the first non-bending area is greater than the thickness of the substrate 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.

22. The display module according to claim 21, characterized in that: From the first non-bending area to the second non-bending area, the thickness of the first buffer layer located in the first bending area gradually decreases.

23. The display module according to claim 21 or 22, characterized in that: The cover plate comprises: a second buffer layer, the second buffer layer comprising a first portion and a second portion; The first portion of the second buffer layer is located in the first non-bending region, the second portion of the second buffer layer is located in the first bending region, and the elastic modulus of the first portion of the second buffer layer is greater than the elastic modulus of the second portion of the second buffer layer.

24. An electronic device, characterized in that: include: case; The display module according to any one of claims 15 to 23; The display module is arranged on the housing.

25. An electronic device, characterized in that: include: Display module; A housing, wherein the housing comprises a frame arranged at the edge of the display module, and a first filling layer is arranged at a position where the frame and the display surface of the display module are in contact with each other; The frame and the first filling layer are an integrally formed structure.

26. The electronic device according to claim 25, characterized in that: The frame and the first filling layer are integrally formed injection-molded structural parts.

27. The electronic device according to claim 25 or 26, characterized in that: A second filling layer is disposed at a position of the frame opposite to the side surface of the display module. The elastic modulus of the second filling layer is smaller than the elastic modulus of the frame.

28. The electronic device according to claim 27, characterized in that: The second filling layer and the frame are an integrally formed structure.

29. The electronic device according to any one of claims 25 to 28, characterized in that: The display module comprises: Display screen; a cover plate, arranged on a display surface side of the display screen, the cover plate comprising 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 connecting the first non-bending area and the second non-bending area, the second bending area connecting the second non-bending area and the third non-bending area, and the first bending area and the second bending area both being able to be bent along a bending line to switch between a flattened state and a closed state; The thickness of the first non-bending region is not equal to the thickness of the second non-bending region.

30. The electronic device according to claim 29, characterized in that The thickness of the first non-bending region is greater than the thickness of the second non-bending region.

31. The electronic device according to claim 30, characterized in that: The cover plate comprises: 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 in the first non-bending area is greater than the thickness of the substrate 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.

32. The electronic device according to claim 31, characterized in that: From the first non-bending area to the second non-bending area, the thickness of the first buffer layer located in the first bending area gradually decreases.

33. The electronic device according to claim 31 or 32, characterized in that: The cover plate comprises: a second buffer layer, the second buffer layer comprising a first portion and a second portion; The first portion of the second buffer layer is located in the first non-bending region, the second portion of the second buffer layer is located in the first bending region, and the elastic modulus of the first portion of the second buffer layer is greater than the elastic modulus of the second portion of the second buffer layer.

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