Display screen assembly and electronic device

Abstract

Embodiments of the present application provide a display screen assembly and an electronic device. The display screen assembly comprises a flexible display screen and a fixing member. The flexible display screen comprises a surface layer, an impact protection layer and a display layer which are stacked. The impact protection layer comprises a first film material group and a second film material group which are stacked and attached to the surface layer and the display layer respectively. The second film material group completely covers the display layer, and the covering area of the first film material group is smaller than that of the second film material group. The fixing member abuts against the part of the second film material group which is not covered by the first film material group. The projection of the fixing member in a first direction overlaps the projection of the second film material group in the first direction, and the projection of the fixing member in the first direction does not overlap the projection of the first film material group in the first direction. The first direction is the stacking direction of the film layers in the flexible display screen. The above technical solution can reduce the thickness of the foldable electronic device, improve the portability of the electronic device, and thus improve the user experience.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display screens, and more particularly, to a display screen assembly and electronic device. BACKGROUND

[0002] Folding electronic devices using flexible display screens have been increasingly supported by users due to their practicality, but there is a common problem of thick and heavy body, which affects the portability of the electronic device and results in a low user experience.

[0003] Therefore, how to thin the thickness of the folding electronic device has become a problem to be solved. SUMMARY

[0004] Embodiments of the present application provide a display screen assembly and electronic device, which can reduce the thickness of the folding electronic device, improve the portability of the electronic device, and thus improve the user experience.

[0005] In a first aspect, a display screen assembly is provided, comprising: a flexible display screen and a fixing member; the flexible display screen comprises a surface layer, an impact protection layer and a display layer arranged in layers, and the impact protection layer is located between the surface layer and the display layer; wherein the impact protection layer comprises a first film material group and a second film material group arranged in layers, the first film material group is attached to the surface layer, the second film material group is attached to the display layer, the second film material group completely covers the display layer, and the coverage area of the first film material group is smaller than that of the second film material group; the fixing member abuts against a portion of the second film material group that is not covered by the first film material group, wherein the projection of the fixing member in a first direction overlaps the projection of the second film material group in the first direction, and the projection of the fixing member in the first direction does not overlap the projection of the first film material group in the first direction, and the first direction is the stacking direction of the film layers in the flexible display screen.

[0006] In embodiments of the present application, a step is provided at the edge of the impact protection layer of the flexible display screen, so that the fixing member can apply a pressing force at the step to fix the flexible display screen. Moreover, in the case where the thickness of the edge pressing part of the fixing member in the film layer stacking direction is constant, the edge pressing part, the impact protection layer and the surface layer all have a coinciding dimension in the film layer stacking direction, compared with the scheme in which the fixing member only has a coinciding dimension with the surface layer, the coinciding dimension of the screen layer and the edge pressing part in the film layer stacking direction is increased, so that the overall thickness of the fixing member in the film layer stacking direction can be reduced, thereby reducing the thickness of the electronic device, improving the portability of the electronic device, and improving the user experience.

[0007] In some embodiments of the first aspect, the fixing member comprises a pressing edge configured to abut against the second film group, and a projection of the first film group in the second direction is within a projection range of the pressing edge in the second direction, wherein the second direction is perpendicular to the first direction.

[0008] In some embodiments of the first aspect, a thickness of the pressing edge in the first direction is greater than or equal to a sum of a thickness of the first film group and a thickness of the surface layer.

[0009] When the thickness of the pressing edge is greater than the sum of the thickness of the first film group and the thickness of the surface layer, the pressing edge protrudes from the flexible display screen in the first direction. The fixing member is relatively hard and can provide support to protect the flexible display screen from being squeezed. In particular, when the flexible display screen is in the inner folding state, the fixing member can provide a certain support force to leave a gap between the opposite screens, preventing the opposite screens from being squeezed against each other.

[0010] When the thickness of the pressing edge is equal to the sum of the thickness of the first film group and the thickness of the surface layer, the fixing member will no longer be a factor limiting the thickness of the electronic device, so that the thickness of the electronic device can be thinned by designing the thickness of the flexible display screen stack.

[0011] In some embodiments of the first aspect, a distance between an edge of the first film group and a surface of the pressing edge facing the first film group is predetermined.

[0012] In this way, the fixing member can accommodate the displacement of the screen stack of the flexible display screen during unfolding and folding.

[0013] In some embodiments of the first aspect, a minimum value of the predetermined distance is 0.4-0.8 mm.

[0014] In some embodiments of the first aspect, the fixing member is arranged around the flexible display screen, the flexible display screen comprises a folding axis along which the flexible display screen can be unfolded or folded, and a minimum distance between the first film group and the pressing edge in a third direction perpendicular to the folding axis is greater than a minimum distance between the first film group and the pressing edge in a fourth direction parallel to the folding axis.

[0015] The flexible display screen has a large displacement of the stack in a direction perpendicular to the folding axis and a small displacement of the stack in a direction parallel to the folding axis, and the gap between the first film group and the pressing edge can be set smaller in the direction with the small displacement.

[0016] With reference to the first aspect, in some implementations of the first aspect, the surface layer completely covers the first film material group; or the surface layer has a smaller coverage area than the first film material group to form a step between the surface layer and the first film material group.

[0017] When the surface layer completely covers the first film material group, the number of film plates required for the flexible display screen during the film layer stacking process can be reduced, and the process flow can be simplified. When the surface layer needs to be replaced or removed, the step provided on the impact protection layer can be used to replace or remove the surface layer together with the first film material group.

[0018] When the surface layer has a smaller coverage area than the first film material group, when the surface layer needs to be replaced or removed, the step provided between the surface layer and the first film material group can be used to replace or remove only the surface layer without affecting other film layers, thereby reducing maintenance costs.

[0019] With reference to the first aspect, in some implementations of the first aspect, the first film material group and / or the second film material group includes at least one film material.

[0020] With reference to the first aspect, in some implementations of the first aspect, the first film material group and / or the second film material group includes one or more of the following film materials: a CPI film material, a PET film material, a TPU film material, a PI film material, or a UTG film material.

[0021] With reference to the first aspect, in some implementations of the first aspect, the first film material group includes a UTG film material; wherein the UTG film material is located between a first film material and the second film material group, a projection of the UTG film material in the first direction coincides with a projection of the first film material in the first direction, and the first film material is a non-UTG film material attached to the surface layer; or the UTG film material is attached to the surface layer, and the UTG film material is completely covered by the surface layer.

[0022] The use of a UTG film material in the first film material group can improve the flatness of the flexible display screen. The UTG film material needs to be completely covered by an upper film material to ensure the performance of the UTG film material.

[0023] With reference to the first aspect, in some implementations of the first aspect, the second film material group includes a UTG film material; wherein the UTG film material is located between a second film material and the display layer, a projection of the UTG film material in the first direction coincides with a projection of the second film material in the first direction, and the second film material is a non-UTG film material abutting against the fixing member.

[0024] The use of a UTG film material in the second film material group can improve the flatness of the flexible display screen. The UTG film material needs to be completely covered by an upper film material to ensure the performance of the UTG film material.

[0025] In a second aspect, an electronic device is provided, comprising a housing and the display screen assembly as in the first aspect or any possible implementation of the first aspect, wherein the fixing member is configured to connect the flexible display screen with the housing. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic structural diagram of an electronic device to which embodiments of the present application are applicable.

[0027] Figure 2 is Figure 1 is a sectional schematic diagram of the electronic device in

[0028] Figure 3 is Figure 2 is a schematic structural diagram of the flexible display screen in

[0029] Figure 4 is a schematic diagram of a screen bonding solution of the prior art.

[0030] Figures 5-6 is a schematic structural diagram of a screen bonding solution provided by embodiments of the present application.

[0031] Figures 7-8 is a schematic diagram of a flexible display screen film layer stack structure provided by embodiments of the present application.

[0032] Figures 9-13 is a schematic diagram of a flexible display screen film layer stack structure provided by embodiments of the present application.

[0033] Figure 14 is a schematic diagram of another flexible display screen film layer stack structure provided by embodiments of the present application.

[0034] Figure 15 is a schematic top view of a display screen assembly provided by embodiments of the present application.

[0035] REFERENCE SIGNS

[0036] 1 - display screen assembly; 11 - flexible display screen; 111 - support layer; 112 - display layer; 113 - impact protection layer; 1131 - first film material group; 1132 - second film material group; 114 - surface layer; 1101 - first platform surface; 1102 - second platform surface; 1103 - step surface; 1104 - first connecting surface; 1105 - second connecting surface; 12 - fixing member; 121 - edge pressing portion; 122 - fixing portion; 123 - connecting portion; 2 - housing. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described below with reference to the drawings.

[0038] In the embodiments of the present application, the terms "first", "second" and the like are used only for descriptive purposes, and cannot be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features.

[0039] In the description of the embodiments of the present application, the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate the orientation or positional relationship defined with respect to the orientation or position of the components shown in the drawings. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, and are not intended to indicate or imply that the device or component must have a specific orientation or be constructed and operated in a specific orientation, which can be changed accordingly according to the orientation of the components shown in the drawings, and therefore cannot be construed as a limitation of the present application.

[0040] It should be further noted that the reference numerals shown in some of the drawings in the embodiments of the present application are also applicable to other drawings. In addition, the various components in the drawings are not drawn to scale, and the size and dimensions of the components shown in the drawings are only exemplary and should not be construed as a limitation of the present application.

[0041] The electronic device involved in the present application can be a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem. The electronic device includes but is not limited to a cellular phone, a television, a smart phone, a personal digital assistant (PDA) computer, a digital camera, a tablet computer, a handheld computer, a laptop computer, a smart watch, a smart wristband, a folding terminal, a vehicle-mounted computer, a desktop computer, a calculator and other electronic devices with display functions.

[0042] The embodiments of the present application do not make special limitations on the specific form of the electronic device, and the following is described and understood by taking the electronic device as a terminal device such as a mobile phone. More specifically, the embodiments of the present application are described by taking the electronic device as a folding screen mobile phone.

[0043] Figure 1 A schematic structural diagram of an electronic device to which the embodiments of the present application are applicable is shown. As shown in Figure 1 The electronic device 100 includes a display screen assembly 1 and a housing 2.

[0044] The shell 2 forms an accommodation space for accommodating various components of the electronic device 100. The shell 2 can also serve to protect the electronic device 100 and support the entire device.

[0045] The display screen assembly 1 is configured to display images. The display screen assembly 1 is disposed in the accommodation space formed by the shell 2 and connected to the shell 2.

[0046] Figure 2 A cross-sectional view of the electronic device 100 along the A-A line is shown in FIG. 3. Figure 1

[0047] As shown in FIG. 4, the display screen assembly 1 can include a flexible display 11 and a fixing member 12. Figure 2

[0048] The flexible display 11 is made of a soft material and can be bent or even twisted (e.g., folded in half) by 360 degrees.

[0049] The flexible display 11 can be an organic light emitting diode (OLED) display, a liquid crystal display (LCD), or a display using other display technologies, and the embodiments of the present application do not limit the flexible display 11.

[0050] In the embodiments of the present application, the flexible display 11 has a light-emitting surface capable of displaying images, and a side surface of the flexible display 11 opposite to the light-emitting surface can be referred to as the back surface of the flexible display 11.

[0051] The fixing member 12 is configured to fix the flexible display 11 to the shell 2, thereby connecting the display screen assembly 1 to the shell 2. The material of the fixing member 12 is not limited in the embodiments of the present application, which can be a metal material or a non-metal material, such as a plastic material, a glass material, a ceramic material, etc.

[0052] In some embodiments, the fixing member 12 can be a frame of the electronic device, specifically a structure surrounding the outer periphery of the electronic device 100, configured to help fix the display screen. The fixing member 12 can be a metal frame (e.g., a frame made of a metal material such as copper, magnesium alloy, stainless steel, etc.), or a non-metal frame (e.g., a plastic frame, a glass frame, a ceramic frame, etc.), and the embodiments of the present application do not limit the fixing member 12.

[0053] In some embodiments, the shell 2 includes a middle frame, and the flexible display 11 can be connected to the middle frame via the fixing member 12 to be fixed. The middle frame is a support frame located inside the electronic device 100 and is generally made of a metal material.

[0054] ​​Thanks to the bendable property of the flexible display screen 11, the electronic device 100 can be designed as a folding or rolling type. For example, as shown in Figure 1 the electronic device 100 can be designed as a folding terminal, which can not only enlarge the screen area for display to meet the needs of gaming, video, learning, office work, etc., but also be easily folded to fit into a pocket for convenient carrying.

[0055] According to different folding modes of the flexible display screen, the folding terminal can include an inner folding folding terminal, an outer folding folding terminal, a three-fold folding terminal, etc. The inner folding folding terminal can also be referred to as a folding terminal, in which the light-emitting surfaces of the flexible display screen are opposite to each other in the folded state. The outer folding folding terminal can also be referred to as a flip terminal, in which the light-emitting surfaces of the flexible display screen are opposite to each other in the folded state. In the three-fold folding terminal, the flexible display screen can be folded in a "Z" shape, so that a user can use three different screen sizes, i.e., small, medium, and large, on the same device.

[0056] With the upgrading of folding electronic devices, their practicality has been supported by more and more users, but the thick and heavy body of the folding electronic devices has also become a major complaint point, so weight reduction and thinning have become the main direction of design optimization of folding electronic devices. The flexible display screen is one of the key devices of the folding electronic device, which has an important influence on the lightweight design of the folding electronic device.

[0057] The flexible display screen is generally a multi-film layer stacked structure. Figure 3 A schematic structural diagram of the flexible display screen in Figure 2 is shown. As shown in Figure 3 the flexible display screen 11 can include a support layer 111, a display layer 112, an impact protection layer 113, and a surface layer 114 arranged in layers. For convenience of description, the film layer stacking direction of the flexible display screen is defined as "Z" direction in the following embodiments of the present application.

[0058] The support layer 111 is located at the bottom layer of the flexible display screen 11, close to the shell 2, and has a certain hardness, which can play a supporting role.

[0059] The display layer 112 is located between the support layer 111 and the impact protection layer 113, and includes a plurality of pixel units for displaying images.

[0060] The impact protection layer 113 is located between the display layer 112 and the surface layer 114, and has a certain impact resistance and wear resistance, which can resist external impact to protect the display layer 112.

[0061] The surface layer 114 is located above the impact protection layer 113 and has an anti-scratch effect. The surface layer 114 can be easily separated from the impact protection layer 113 for replacement or removal when needed.

[0062] In order to fix the flexible display screen on the shell 2, in addition to being fixed by adhesive between the support layer 111 and the shell 2, a fixing member 12 is used to press the periphery of the screen in the direction of the film layer stacking to fix the screen, and also prevent the adhesive from cracking.

[0063] Figure 4 A schematic diagram of an existing screen bonding scheme is shown. Referring to Figure 4 In the existing screen bonding scheme, the edge of the surface layer 114 is inwardly recessed relative to the edge of the impact protection layer 113, thereby forming a step between the surface layer 114 and the impact protection layer 113, and the fixing member 12 covers the edge portion of the impact protection layer 113 for fixing. Generally, the portion of the fixing member 12 used for edge pressing has a thickness in the film layer stacking direction (i.e. Z direction) that is much greater than the thickness of the surface layer 114, so there is a large idle thickness h between the upper surface of the surface layer 114 and the upper surface of the portion of the fixing member 12 used for edge pressing, resulting in a large overall thickness of the electronic device, especially when the electronic device is in a folded state, which affects the portability of the electronic device and thus the user experience.

[0064] Therefore, the present application provides a screen bonding scheme, specifically a display screen assembly and an electronic device, which can reduce the thickness of the foldable electronic device, improve the portability of the electronic device, and thus improve the user experience. The following will be described in detail with reference to the accompanying drawings.

[0065] Figure 5 A schematic structural diagram of a screen bonding scheme provided by an embodiment of the present application is shown. As Figure 5 shown, the display screen assembly includes a flexible display screen 11 and a fixing member 12, wherein the fixing member 12 is used to fix the flexible display screen 11 on a shell 2.

[0066] The flexible display screen 11 includes a support layer 111, a display layer 112, an impact protection layer 113 and a surface layer 114 stacked in sequence. The support layer 111 is located at the bottom layer of the flexible display screen 11 and is close to the shell 2, and is used to connect with the shell 2. The surface layer 114 is located at the light exit side of the flexible display screen 11 and is farthest from the support layer 111. The impact protection layer 113 and the display layer 112 are located between the support layer 111 and the surface layer 114, wherein the impact protection layer 113 is close to the surface layer 114 and the display layer 112 is close to the support layer 111.

[0067] In the present application, the edge portion of the impact protection layer 113 is stepped in the first direction Z, and the fixing member 12 applies a force in the first direction Z at the step for fixing the flexible display screen 11. The first direction Z is the film layer stacking direction.

[0068] Referring to Figure 5The impact protection layer 113 includes a first platform surface 1101, a second platform surface 1102, a step surface 1103, a first connecting surface 1104, and a second connecting surface 1105.

[0069] The first platform surface 1101 is used to attach the surface layer 114, and the projected area of the first platform surface 1101 in the first direction Z is greater than or equal to the projected area of the surface layer 114 in the first direction Z.

[0070] The second platform surface 1102 is used to attach the display layer 112, and the projected area of the second platform surface 1102 in the first direction Z is equal to the projected area of the display layer 112 in the first direction Z. That is, the second platform surface 1102 of the impact protection layer 113 completely covers the display layer 112.

[0071] The first connecting surface 1104 is used to connect the first platform surface 1101 and the step surface 1103, and the second connecting surface 1105 is used to connect the second platform surface 1102 and the step surface 1103. The projected area of the second platform surface 1102 in the first direction Z is equal to the sum of the projected area of the first platform surface 1101 in the first direction Z and the projected area of the step surface 1103 in the first direction Z.

[0072] The fixing member 12 includes a pressing edge portion 121, a fixing portion 122, and a connecting portion 123 used to connect the pressing edge portion 121 and the fixing portion 122.

[0073] The fixing portion 122 is connected with the shell 2.

[0074] The pressing edge portion 121 abuts against the step surface 1103 of the impact protection layer 113 to exert an action force along the first direction Z on the flexible display screen 11 through the step surface 1103, thereby fixing the flexible display screen 11 and preventing the flexible display screen 11 from being cracked due to delamination between film layers.

[0075] The pressing edge portion 121 and the impact protection layer 113 have a coinciding dimension in the first direction Z. That is, the projection of the impact protection layer 113 in the second direction X overlaps the projection of the pressing edge portion 121 in the second direction X. Here, the second direction X is a direction perpendicular to the film layer stacking direction (i.e., the first direction Z).

[0076] In the embodiments of the present application, the step is arranged at the edge of the impact protection layer 113 of the flexible display screen 11, so that the fixing member 12 can abut against the step surface 1103 to apply the pressing force, which can fix the flexible display screen 11. In addition, in the case that the thickness of the pressing edge portion 121 of the fixing member 12 in the film layer stacking direction is constant, the pressing edge portion 121 has the overlapping dimension with the impact protection layer 113 and the surface layer 114 in the film layer stacking direction, compared with the scheme that the fixing member 12 only has the overlapping dimension with the surface layer 114, the overlapping dimension of the screen layer and the pressing edge portion 121 in the film layer stacking direction is increased, so that the upper surface of the surface layer 114 is close to the upper surface of the pressing edge portion 121, and the idle thickness between the upper surface of the surface layer 114 and the upper surface of the pressing edge portion 121 is reduced. In this way, the problem of thickness space waste caused by the screen layer can be solved, the space utilization is improved, and the overall thickness of the electronic device is reduced. In other words, the above scheme can reduce the overall thickness of the fixing member 12 in the film layer stacking direction, so as to reduce the thickness of the electronic device, improve the portability of the electronic device, and improve the user experience.

[0077] In some embodiments, the thickness of the pressing edge portion 121 in the first direction Z is greater than the distance between the step surface 1103 and the surface of the surface layer 114 away from the first platform surface 1101. That is, the thickness of the pressing edge portion 121 in the first direction Z is greater than the sum of the distance between the step surface 1103 and the first platform surface 1101 and the thickness of the surface layer 114.

[0078] In this way, the pressing edge portion 121 of the fixing member 12 protrudes from the flexible display screen 11 in the first direction Z. The fixing member 12 is made of hard material and can provide support to protect the flexible display screen from being pressed. In particular, when the flexible display screen 11 is in the inner stacking state, the fixing member 12 can provide a certain support force to leave a gap between the opposite screens to prevent the opposite screens from being pressed against each other.

[0079] In other embodiments, the thickness of the pressing edge portion 121 in the first direction Z is less than or equal to the distance between the step surface 1103 and the surface of the surface layer 114 away from the first platform surface 1101. That is, the thickness of the pressing edge portion 121 in the first direction Z is less than or equal to the sum of the distance between the step surface 1103 and the first platform surface 1101 and the thickness of the surface layer 114.

[0080] In this way, the surface of the flexible display screen 11 is flush with or protrudes from the pressing edge portion 121, and the fixing member 12 will no longer be a factor limiting the thickness of the electronic device, so that the thickness of the electronic device can be reduced by designing the thickness of the flexible display screen layer.

[0081] In some embodiments, a gap is provided between the surface of the fixing member 12 facing the side surface of the flexible display 11 and the side surface of the flexible display 11. In this way, the fixing member 12 can accommodate the amount of displacement of the screen stack of the flexible display 11 during unfolding and folding. Here, the side surface of the flexible display 11 refers to the surface of the flexible display 11 perpendicular to the first direction Z.

[0082] Optionally, a gap is provided between the first connecting surface 1104 of the impact protection layer 113 and the surface of the fixing member 12 (specifically, the pressing edge portion 121) facing the first connecting surface 1104. For example, referring to FIG. 10, a gap a is provided between the first connecting surface 1104 of the impact protection layer 113 and the surface of the fixing member 12 (specifically, the pressing edge portion 121) facing the first connecting surface 1104. Figure 6 The minimum value of the gap a can be designed to be 0.4 mm-0.8 mm.

[0083] Optionally, a gap is provided between the second connecting surface 1105 of the impact protection layer 113 and the surface of the fixing member 12 (specifically, the connecting portion 123) facing the second connecting surface 1105. For example, referring to FIG. 11, a gap c is provided between the second connecting surface 1105 of the impact protection layer 113 and the surface of the fixing member 12 (specifically, the connecting portion 123) facing the second connecting surface 1105. Figure 6 The minimum value of the gap c can be designed to be 0.6 mm-1.1 mm.

[0084] Optionally, a gap is provided between the side surface of the support layer 111 and the surface of the fixing member 12 (specifically, the fixing portion 122) facing the side surface of the support layer 111. For example, referring to FIG. 12, a gap d is provided between the side surface of the support layer 111 and the surface of the fixing member 12 (specifically, the fixing portion 122) facing the side surface of the support layer 111. Figure 6 The minimum value of the gap d can be designed to be 0.4 mm-0.8 mm. Here, the side surface of the support layer 111 refers to the surface of the support layer 111 perpendicular to the first direction Z.

[0085] In some embodiments, in order to ensure reliable pressing of the flexible display 11 by the fixing member 12, referring to FIG. 13, the minimum value of the pressing edge width b of the pressing edge portion 121 can be designed to be 0.7 mm-1.2 mm. Figure 6 It should be understood that the pressing edge width of the pressing edge portion 121 referred to herein refers to the width of the portion of the pressing edge portion 121 abutting against the stepped surface 1103 in the second direction X. That is, the width of the projection of the pressing edge portion 121 and the stepped surface 1103 in the first direction Z in the second direction X.

[0086] In some embodiments, in order to ensure the strength of the fixing member 12, referring to FIG. 14, the minimum value of the thickness e of the pressing edge portion 121 in the first direction Z can be designed to be 0.2 mm-0.3 mm. Figure 6

[0087] In some embodiments, referring to FIG. 15, the thickness f of the surface layer 114 of the flexible display 11 is in the range of 0.04 mm-0.06 mm. Figure 6

[0088] In some embodiments, referring to FIG. 16, the thickness g of the support layer 111 is in the range of 0.2 mm-0.3 mm. Figure 6 ​​The thickness g of the impact protection layer 113 of the flexible display screen 11 is 0.15-0.25 mm.

[0089] The impact protection layer 113 of the flexible display screen 11 comprises a plurality of film layers, and the step formed on the impact protection layer 113 is formed by stacking the film layers. The film layer stacking structure of the impact protection layer is described in detail below with reference to the drawings.

[0090] Figure 7 A schematic diagram of the film layer stacking structure of the flexible display screen provided by the embodiments of the present application is shown.

[0091] As shown in Figure 7 , in the flexible display screen 11, the impact protection layer 113 comprises a first film layer group 1131 and a second film layer group 1132 stacked together. The first film layer group 1131 and the second film layer group 1132 each comprise one or more film layers.

[0092] The first film layer group 1131 is close to the surface layer 114 and attached to the surface layer 114, and the surface of the first film layer group 1131 attached to the surface layer 114 is the first platform surface 1101. The second film layer group 1132 is close to the display layer 112 and attached to the display layer 112, and the surface of the second film layer group 1132 attached to the display layer 112 is the second platform surface 1102.

[0093] The edges of the first film layer group 1131 are inwardly recessed relative to the edges of the second film layer group 1132 towards the center of the flexible display screen, so as to form a step between the first film layer group 1131 and the second film layer group 1132. The edge pressing portion 121 of the fixing member 12 abuts against the second film layer group 1132 at the step. The edge pressing portion 121 has a coinciding dimension with the first film layer group 1131 in the first direction Z.

[0094] That is, the projection of the edge pressing portion 121 in the first direction Z has no overlap with the projection of the first film layer group 1131 in the first direction Z, and has overlap with the projection of the second film layer group 1132 in the first direction Z. The projection of the edge pressing portion 121 in the second direction X has overlap with the projection of the first film layer group 1131 in the second direction X, and has no overlap with the projection of the second film layer group 1132 in the second direction X.

[0095] The first film layer group 1131 covers part of the area of the second film layer group 1132, and the part of the second film layer group 1132 not covered by the first film layer group 1131 is the step surface 1103. The surface of the first film layer group 1131 perpendicular to the first direction Z (i.e., the side surface of the first film layer group 1131) is the first connecting surface 1104. The surface of the second film layer group 1132 perpendicular to the first direction Z (i.e., the side surface of the second film layer group 1132) is the second connecting surface 1105.

[0096] The second film material group 1132 completely covers the display layer 112 to protect the display layer 112, so that the pressing edge portion 121 of the fixing member 12 does not directly contact and slide relative to the display layer 112 during unfolding and folding of the flexible display screen, thereby preventing the display layer from being damaged by friction and affecting the display structure. In this way, the display layer can be protected from being damaged while reducing the idle thickness, prolonging the service life of the flexible display screen, and ensuring the display effect of the flexible display screen.

[0097] In the embodiments of the present application, the first film material group 1131 can include one layer of film material or multiple layers of film material. When the first film material group 1131 includes multiple layers of film material, the film materials of different layers can be the same or different, which is not limited in the embodiments of the present application.

[0098] In the embodiments of the present application, the second film material group 1132 can include one layer of film material or multiple layers of film material. When the second film material group 1132 includes multiple layers of film material, the film materials of different layers can be the same or different, which is not limited in the embodiments of the present application.

[0099] In addition, the film material included in the first film material group 1131 and the film material included in the second film material group 1132 can be completely the same, partially the same, or completely different, which is not limited in the embodiments of the present application.

[0100] In some embodiments, any one layer of film material included in the first film material group 1131 and the second film material group 1132 can be any one of the following film materials: a polyimide (PI) film material, a colorless polyimide (CPI) film material, an ultra-thin glass (UTG) film material, a thermoplastic polyurethanes rubber (TPU) film material, or a polyethylene terephthalate (PET) film material.

[0101] The PI film material has excellent high and low temperature resistance, electrical insulation, adhesion, radiation resistance, and medium resistance, and can be used for a long time in a temperature range of -269℃ to 280℃, and can reach a high temperature of 400℃ for a short time.

[0102] The CPI film material has excellent performance of the traditional PI film material, has high heat resistance, high reliability, flexibility, low density, low dielectric constant, and easy micro-pattern circuit processing, and overcomes the shortcomings of the PI film material, such as shallow yellow or deep yellow color.

[0103] The UTG film material has better performance than the CPI film material, has higher quality, stronger impact resistance and wear resistance, higher light transmittance, and can effectively prolong the service life of the flexible display screen.

[0104] TPU film has high strength, good toughness, wear resistance, cold resistance, oil resistance, water resistance, aging resistance, weather resistance and other characteristics.

[0105] PET film has excellent physical and mechanical properties in a wide temperature range, long-term use temperature up to 120℃, excellent electrical insulation, even at high temperature and high frequency, its electrical properties are still good, has anti-creep, fatigue resistance, friction resistance, good dimensional stability and other characteristics.

[0106] Reference Figure 7 In some embodiments, the edge of the surface layer 114 of the flexible display screen 11 can be flush with the edge of the first film group 1131. That is, the surface layer 114 can completely cover the first film group 1131, or the projection of the surface layer 114 and the first film group 1131 in the first direction Z is completely coincident.

[0107] In this way, the film plate required by the flexible display screen in the film layer stacking process can be reduced, and the process flow is simplified. When the surface layer needs to be replaced or removed, the surface layer 114 and the first film group 1131 can be replaced or removed together by using the step provided on the impact protection layer 113.

[0108] In other embodiments, referring to Figure 8 , the edge of the surface layer 114 of the flexible display screen 11 can be inwardly recessed relative to the edge of the first film group 1131. That is, the surface layer 114 can cover part of the first film group 1131, or the projection of the first film group 1131 in the first direction Z is greater than the projection of the surface layer 114 in the first direction Z, so that a step is also formed between the surface layer 114 and the first film group 1131.

[0109] In this way, when the surface layer needs to be replaced or removed, the surface layer 114 can be replaced or removed only by using the step provided between the surface layer 114 and the first film group 1131, without affecting other film layers, thereby reducing maintenance cost.

[0110] The above describes the schematic structural diagram of the display screen assembly provided by the embodiments of the present application, and the following describes some specific non-limiting examples of the embodiments of the present application in more detail, to illustrate the film layer stacking structure of the flexible display screen. Figures 5-8 Figures 9-13 It should be noted that only the differences in the stacking structures shown in different figures are described below, and the remaining parts not described in detail can be referred to the description of the foregoing related content.

[0111] It should be noted that only the differences in the stacking structures shown in different figures are described below, and the remaining parts not described in detail can be referred to the description of the foregoing related content.

[0112] ​In a possible design, in the impact protection layer 113, the first film group 1131 and the second film group 1132 can each include one layer of film.

[0113] For example, referring to FIG. 11A, the first film group 1131 can include one layer of CPI film, and the second film group 1132 can include one layer of PET film. Figure 9 For example, referring to FIG. 11A, the first film group 1131 can include one layer of CPI film, and the second film group 1132 can include one layer of PET film.

[0114] Optionally, the CPI film in the first film group 1131 can be replaced by any one of a PET film, a TPU film, and a PI film. Figure 9 Optionally, the PET film in the second film group 1132 can be replaced by any one of a CPI film, a TPU film, and a PI film.

[0115] Figure 9 Optionally, the PET film in the second film group 1132 can be replaced by any one of a CPI film, a TPU film, and a PI film.

[0116] In a possible design, in the impact protection layer 113, the first film group 1131 can include one layer of film, and the second film group 1132 can include multiple layers of film. Alternatively, the first film group 1131 can include multiple layers of film, and the second film group 1132 can include one layer of film. The multiple layers of film can be the same or different.

[0117] For example, referring to FIG. 11B, the first film group 1131 can include one layer of CPI film, and the second film group 1132 can include two layers of PET film. Figure 10 For example, referring to FIG. 11B, the first film group 1131 can include one layer of CPI film, and the second film group 1132 can include two layers of PET film.

[0118] Optionally, the CPI film in the first film group 1131 can be replaced by any one of a PET film, a TPU film, and a PI film. Figure 10 Optionally, the PET film in the second film group 1132 can be replaced by any one of a CPI film, a TPU film, and a PI film.

[0119] Figure 10 Optionally, the PET film in the second film group 1132 can be replaced by any one of a CPI film, a TPU film, and a PI film.

[0120] In a possible design, in the impact protection layer 113, the first film group 1131 and the second film group 1132 can each include multiple layers of film. The multiple layers of film can be the same or different.

[0121] For example, referring to FIG. 11C, the first film group 1131 can include one layer of CPI film, and the second film group 1132 can include two layers of PET film. Figure 11 ​​As shown, the first film material group 1131 may include one layer of CPI film and one layer of TPU film, and the second film material group 1132 may include two layers of PET film. The two PET film layers are stacked and completely cover the display layer 112. The CPI film and TPU film are stacked and partially cover the upper PET film to form a step.

[0122] In one possible design, the first film group 1131 and / or the second film group 1132 may include a UTG film, wherein the UTG film needs to be completely covered by the upper film. Using a UTG film can improve the flatness of the screen.

[0123] For example, refer to Figure 12 As shown, when the first membrane material group 1131 includes a UTG membrane material, the UTG membrane material can be disposed at any membrane layer position below the first membrane material, and the projection of the UTG membrane material in the first direction Z is within the projection range of the first membrane material in the first direction Z, or coincides with the projection of the first membrane material in the first direction Z. The first membrane material is the membrane layer attached to the surface layer 114.

[0124] In some embodiments, the first membrane material group 1131 may include a CPI membrane material, a TPU membrane material, and a UTG membrane material stacked together. The CPI membrane material is attached to the surface layer 114, and the UTG membrane material is attached to the second membrane material group 1132.

[0125] Of course, the UTG membrane material can be placed in the position of the first membrane material, but the surface layer 114 must completely cover the UTG membrane material. Figure 12 When the first membrane material is a UTG membrane material, the edge of the surface layer 114 must be flush with the edge of the UTG membrane material so that the projection of the UTG membrane material in the first direction Z is within the projection range of the surface layer 114 in the first direction Z. This ensures the performance of the UTG membrane material.

[0126] For example, refer to Figure 13 As shown, when the second membrane material group 1132 includes a UTG membrane material, the UTG membrane material can be disposed at any membrane layer position below the second membrane material, and the projection of the UTG membrane material in the first direction Z is within the projection range of the second membrane material in the first direction Z, or coincides with the projection of the second membrane material in the first direction Z. The second membrane material is the membrane layer attached to the first membrane material group, that is, the membrane layer abutting against the fixing member 12.

[0127] That is, in the second film group 1132, the film material other than the film material abutting against the fixing member 12 can be the UTG. If the surface layer 114 cannot completely cover the first film group 1131, in the first film group 1131, the film material other than the film material attached to the surface layer 114 can be the UTG. If the surface layer 114 can completely cover the first film group 1131, in the first film group 1131, the film material of any layer can be the UTG.

[0128] It should be understood that the first film group 1131 and the second film group 1132 can also have other film layer stacking manners, Figures 9-13 The film layer stacking structure shown in the above table is only exemplary, and the embodiments of the present application are not limited thereto.

[0129] Figure 14 A schematic diagram of a film layer stacking structure of a flexible display screen provided by an embodiment of the present application is shown.

[0130] It should be noted that, Figure 14 The film layer stacking structure of each layer in the flexible display screen shown in the above table is only exemplary and is used only for understanding the overall structure of the flexible display screen, but the present application is not limited thereto. Generally, the internal structure of different layer groups will adopt different materials and thicknesses according to the design verification of different manufacturers, but they can all adopt the way of setting steps on the impact protection layer provided by the embodiments of the present application to achieve the thinning of the electronic device.

[0131] As Figure 14 The surface layer 114 can include one or more layers of phenolic resin (PF) film material.

[0132] The impact protection layer 113 includes one or more of CPI film material, TPU film material, PET film material, UTG film material, and PI film material, wherein each film material can be provided in one or more layers.

[0133] The display layer 112 partially or entirely includes a base film material, a panel layer, one or more layers of PET film material, a polarizer (POL) layer, and the like.

[0134] The support layer 111 partially or entirely includes an ultra-thin metal layer (such as a metal bamboo book layer), a PI film material, a foam adhesive layer, and the like.

[0135] Optionally, the width of the portion of the support layer 111 not covered by the display layer 112 along the second direction X can be 0.2mm-0.3mm. The distance between the edge of the support layer 111 and the surface of the fixing member 12 facing the side of the support layer 111 can be 0.4mm-0.8mm to accommodate the amount of layer misalignment of the flexible display layer during folding and unfolding.

[0136] In this embodiment, the various film materials can be bonded together using optically clear adhesive (OCA). The various film materials mentioned above can be understood as film layers including a layer of optically clear adhesive.

[0137] In this embodiment, the fastener 12 can be a structure surrounding the outer periphery of the flexible display screen 11, so that the pressing edge 121 of the fastener 12 abuts against the stepped surface 1103 formed around the flexible display screen 11. When the electronic device is a foldable terminal, the flexible display screen can be folded along the folding axis.

[0138] Figure 15 A schematic top view of a display assembly provided in an embodiment of this application is shown. Figure 15 As shown, the inner solid line can be understood as the edge of the first film material group 1131 on the flexible display layer, and the outer solid line can be understood as the surface of the fixing member 12 facing the edge of the first film material group 1131. Since the flexible display screen has a large stacking misalignment in the direction perpendicular to the folding axis (referred to as the third direction for convenience), and a small stacking misalignment in the direction parallel to the folding axis (referred to as the fourth direction for convenience), the minimum distance m between the first film material group 1131 and the surface of the fixing member 12 facing the first film material group 1131 in the third direction is greater than the minimum distance n between the first film material group 1131 and the surface of the fixing member 12 facing the first film material group 1131 in the fourth direction, i.e., m > n.

[0139] The method provided in this application can reduce the thickness of foldable electronic devices, improve their portability, and thus enhance the user experience.

[0140] It should be understood that the methods provided in this application are not only applicable to foldable electronic devices, but also applicable to electronic devices with flexible displays.

[0141] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0142] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A display screen assembly, characterized by The display screen assembly comprises: a flexible display screen (11) and a fixing member (12); the flexible display screen (11) comprises a surface layer (114), an impact protection layer (113) and a display layer (112) arranged in layers, and the impact protection layer (113) is located between the surface layer (114) and the display layer (112); the impact protection layer (113) comprises a first film group (1131) and a second film group (1132) arranged in layers, the first film group (1131) is attached to the surface layer (114), the second film group (1132) is attached to the display layer (112), the second film group (1132) completely covers the display layer (112), and the covering area of the first film group (1131) is smaller than that of the second film group (1132); the fixing member (12) abuts against a portion of the second film group (1132) that is not covered by the first film group (1131), the projection of the fixing member (12) in a first direction overlaps the projection of the second film group (1132) in the first direction, and the projection of the fixing member (12) in the first direction does not overlap the projection of the first film group (1131) in the first direction, the first direction being the stacking direction of the film layers in the flexible display screen (11).

2. The display screen assembly of claim 1, wherein, the fixing member (12) comprises a pressing edge (121) for abutting against the second film group (1132), and the projection of the first film group (1131) in a second direction is within the projection range of the pressing edge (121) in the second direction, wherein the second direction is perpendicular to the first direction.

3. The display screen assembly of claim 2, wherein, In the first direction, the thickness of the pressing edge (121) is greater than or equal to the sum of the thickness of the first film group (1131) and the thickness of the surface layer (114).

4. The display screen assembly of claim 2, wherein, The edge of the first film group (1131) and the surface of the pressing edge (121) facing the first film group (1131) have a preset distance.

5. The display screen assembly of claim 4, wherein, The minimum value of the preset distance is 0.4mm-0.8mm.

6. The display screen assembly of any of claims 2-5, wherein, The fixing member (12) is arranged around the flexible display screen (11), the flexible display screen (11) comprises a folding axis, and the flexible display screen (11) can be unfolded or folded along the folding axis; wherein the minimum distance between the first film group (1131) and the pressing edge (121) in a third direction is greater than the minimum distance between the first film group (1131) and the pressing edge (121) in a fourth direction, the third direction being perpendicular to the folding axis, and the fourth direction being parallel to the folding axis.

7. The display screen assembly of any one of claims 1-5, wherein: the surface layer (114) completely covers the first film group (1131); or The covering area of the surface layer (114) is less than that of the first film group (1131), so as to form a step between the surface layer (114) and the first film group (1131).

8. The display screen assembly of any one of claims 1 to 5, wherein, The first film group (1131) and / or the second film group (1132) comprises one or more of the following films: CPI film, PET film, TPU film, PI film or UTG film.

9. The display screen assembly of any one of claims 1 to 5, wherein, The first film group (1131) comprises a UTG film; wherein, The UTG film is located between a first film and the second film group (1132), and the projection of the UTG film in the first direction coincides with the projection of the first film in the first direction, the first film being a non-UTG film attached to the surface layer (114); or, The UTG film is attached to the surface layer (114), and the UTG film is completely covered by the surface layer (114).

10. The display screen assembly of any one of claims 1 to 5, wherein, The second film group (1132) comprises a UTG film; wherein, The UTG film is located between a second film and the display layer (112), and the projection of the UTG film in the first direction coincides with the projection of the second film in the first direction, the second film being a non-UTG film abutting against the fixing member (12).

11. An electronic device, comprising: A display screen assembly comprising a housing (2) and a display screen assembly as claimed in any one of claims 1 to 10, wherein the fixing member (12) is configured to connect the flexible display screen (11) to the housing (2).

Images