WO2024131142A1

WO2024131142A1 - Electronic device, display screen assembly and support member thereof

Info

Publication number: WO2024131142A1
Application number: PCT/CN2023/117050
Authority: WO
Inventors: 邹凌云; 吴献明; 刘宇
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-12-20
Filing date: 2023-09-05
Publication date: 2024-06-27
Also published as: CN118230641A

Abstract

Provided in the present application are an electronic device, a display screen assembly and a support member thereof. The support member comprises a first metal layer, a fiber material layer and a second metal layer which are successively stacked. In the support member for a flexible display screen provided in the embodiments of the present invention, by designing the structure having the metal layers and the fiber material layer stack one on another, the strength of the support member is ensured to reliably support the flexible display screen on one hand and, on the other hand, the weight and the thickness of the support member are reduced, thus greatly helping to thin and reduce the weight of the whole electronic device.

Description

Electronic equipment, display screen assembly and its supporting parts

[Technical field]

The present application relates to the technical field of flexible screen electronic device structures, and in particular to an electronic device, a display screen assembly and a support thereof.

【Background technique】

In the current intelligent information age, users use mobile terminals more and more frequently, and the usage scenarios are becoming more and more diverse. At present, the screen size of most portable intelligent mobile terminals is less than 7 inches. Compared with tablets and laptops, the screen display area is limited and the user operation experience is limited. The emergence of flexible screens solves such problems well. By bending or curling the flexible screen, the large screen can be stored in a small body, which is convenient for users to carry. At the same time, the small screen is used as a normal mobile phone. When it is switched to a large screen, news reading and social chatting can be achieved. At the same time, the user's game operation experience can be improved, which greatly enriches the user's usage scenarios. However, in the current structure of folding electronic devices, a steel sheet structure is generally provided at the bottom of the folding screen for support. In the bending area, in order to improve the bendability of the steel sheet, it is generally necessary to do a hollowing process (difficult processing). The flexible screen support scheme of this structure still has the following problems. One is that the steel sheet is used for support. In order to ensure the support strength, the thickness of the steel sheet is large, which leads to the overall weight being too large, which is not conducive to the lightweight design of the electronic equipment. If the steel sheet is too thin, it cannot play a reliable supporting role.

[Summary of the invention]

According to a first aspect of an embodiment of the present application, there is provided a support member for a flexible display screen, wherein the support member includes a first metal layer, a fiber material layer, and a second metal layer which are sequentially stacked.

In a second aspect, an embodiment of the present application provides a display screen assembly, which includes a flexible display screen and a support member, wherein the support member is connected to a non-light-emitting side of the flexible display screen and is stacked with the flexible display screen; the support member includes a first metal layer, a fiber material layer, and a second metal layer stacked in sequence.

In a third aspect, an embodiment of the present application provides an electronic device, comprising a shell and a display screen assembly; the shell comprises a first shell, a second shell and a hinge assembly; the first shell and the second shell are respectively connected to the hinge assembly, and the first shell and the second shell can rotate with the hinge assembly; the display screen assembly is respectively connected to the first shell and the second shell and straddles the hinge assembly, and the display screen assembly can be folded or flattened with the relative rotation of the first shell and the second shell; the display screen assembly comprises a flexible display screen and a support member, the support member is connected to the non-light-emitting side of the flexible display screen and is stacked with the flexible display screen; the support member comprises a first metal layer, a fiber material layer and a second metal layer which are stacked in sequence.

The support member for the flexible display provided in the embodiment of the present application is designed with a structure composed of stacked metal layers and fiber material layers. On the one hand, it can ensure the reliable supporting strength of the support member for the flexible display screen, and on the other hand, it can also reduce the weight and thickness of the support member, which greatly improves the thinning and weight reduction of the entire electronic device.

【Brief Description of the Drawings】

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic structural diagram of an embodiment of a foldable electronic device of the present application in an unfolded state;

FIG2 is a schematic diagram of the structure of the electronic device in the folded state according to the embodiment of FIG1 ;

FIG3 is a schematic cross-sectional view of the structure of the electronic device at position A-A in the embodiment of FIG1 ;

FIG4 is a schematic block diagram of the structure of an electronic device according to an embodiment of the present application;

FIG5 is a schematic structural diagram of an embodiment of a display screen assembly of the present application;

FIG6 is a schematic structural diagram of an embodiment of a support member of the present application;

FIG7 is a schematic structural diagram of another embodiment of a support member of the present application;

FIG. 8 is a schematic structural diagram of another embodiment of a support member of the present application.

【Detailed ways】

The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

As used herein, "electronic equipment" (or simply "terminal") includes, but is not limited to, a device configured to receive/send communication signals via a wireline connection (such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and/or another data connection/network) and/or via a wireless interface (for example, for a cellular network, a wireless local area network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless device". The term "wireless communication terminal", "wireless terminal" or "mobile terminal" is used herein. Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radio telephones with data processing, fax and data communication capabilities; PDAs that can include radio telephones, pagers, Internet/Intranet access, Web browsers, notepads, calendars and/or global positioning system (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include radiotelephone transceivers. A mobile phone is an electronic device configured with a cellular communication module.

The present application provides a foldable electronic device. Please refer to Figures 1 to 3. Figure 1 is a schematic diagram of the structure of the unfolded state of the foldable electronic device of the present application; Figure 2 is a schematic diagram of the structure of the folded state of the electronic device in the embodiment of Figure 1; Figure 3 is a schematic diagram of the structure of the electronic device at A-A in the embodiment of Figure 1; it should be noted that the electronic device in the present application may include electronic devices with foldable flexible display screens such as mobile phones, tablet computers, laptops, and wearable devices. The electronic device 10 includes but is not limited to the following structures: a housing 100, a display assembly 200, and a circuit assembly 300.

Specifically, please continue to refer to Figures 2 and 3. The housing 100 includes a first housing 110, a second housing 120, and a hinge assembly 130. The first housing 110 and the second housing 120 are respectively connected to the hinge assembly 130, and the first housing 110 and the second housing 120 can rotate with the hinge assembly 130. The detailed structure of the hinge assembly is within the scope of understanding of those skilled in the art and will not be repeated here. The display assembly 200 is respectively connected to the first housing 110 and the second housing 120 and straddles the hinge assembly 130. The display assembly 200 can be folded (in the state in Figure 3) or flattened (in the state in Figure 2) with the relative rotation of the first housing 110 and the second housing 120 (along the direction of the double arrow in Figure 4).

Optionally, the circuit assembly 300 may include a battery 310 and a control circuit board 320, etc. In addition, the electronic device may also include a camera, a speaker, and various sensors, etc. The detailed features of this part are within the scope of understanding of those skilled in the art and will not be repeated here.

Please refer to Figure 4, which is a schematic diagram of the structural composition block diagram of an embodiment of an electronic device of the present application. The electronic device can be a foldable mobile phone, a tablet computer, a laptop computer, a wearable device, etc. The diagram of this embodiment takes a foldable mobile phone as an example. The structure of the electronic device 10 may include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (which may be the display screen assembly 200 in the above embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980 (which may be the control circuit board 320 in the above embodiment) and a power supply 990 (which may be the battery 310 in the above embodiment), etc. Among them, the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960 and the wifi module 970 are respectively connected to the processor 980; the power supply 990 is used to provide power to the entire electronic device 10.

Specifically, the RF circuit 910 is used to receive and send signals; the memory 920 is used to store data instruction information; the input unit 930 is used to input information, which may specifically include a touch panel 931 and other input devices 932 such as operation buttons; the display unit 940 may include a display panel 941, etc.; the sensor 950 includes an infrared sensor, a laser sensor, etc., for detecting user approach signals, distance signals, etc.; the speaker 961 and the microphone (or microphone) 962 are connected to the processor 980 through the audio circuit 960 for receiving and sending sound signals; the wifi module 970 is used to receive and transmit wifi signals, and the processor 980 is used to process data information of the electronic device. For the specific structural features of the electronic device, please refer to the relevant description of the above embodiment, which will not be described in detail here.

The structure of the display screen assembly will be described in detail below. Schematic diagram of the structure of the embodiment, wherein the display screen assembly 200 in this embodiment includes a flexible display screen 221 and a support member 222, wherein the support member 222 is connected to the non-light-emitting side of the flexible display screen 221 and is stacked with the flexible display screen 221. It should be noted here that the display screen assembly in this embodiment is not limited to being used in the folding screen electronic device structure in this embodiment, and can also be used in structures such as a scroll screen. This embodiment is only described by taking the folding structure as an example.

Please refer to FIG. 6, which is a schematic diagram of the structure of an embodiment of the support member of the present application. The support member 222 in this embodiment includes a first metal layer 2221, a fiber material layer 2222, and a second metal layer 2223, which are stacked in sequence. Optionally, the material of the first metal layer 2221 and the second metal layer 2223 in this embodiment can be stainless steel, and the thickness of the first metal layer 2221 and the second metal layer 2223 is 0.02mm to 0.03mm, specifically 0.02mm, 0.021mm, 0.022mm, 0.025mm, 0.028mm, 0.03mm, etc. The fiber material layer 2222 can be made of carbon fiber (made of carbonized fiber treated with epoxy coating and graphite pressed) material, or a fiber cloth structure.

Stainless steel has a high modulus of 193GPa, good rigidity, and cheap processing; the density of stainless steel is 7.9g/ ^cm3 . Carbon fiber itself has a very high modulus in the fiber direction and a low density of only 1.8g/ ^cm3 . After mixing with epoxy resin, it can even be lower than 1.6g/ ^cm3 .

Please refer to FIG. 7, which is a schematic diagram of the structure of another embodiment of the support member of the present application. The support member 222 in this embodiment includes a first metal layer 2221, a fiber material layer 2222, and a second metal layer 2223 stacked in sequence. Different from the previous embodiment, the fiber material layer 2222 in this embodiment includes a first unidirectional fiber material layer 22221 and a second unidirectional fiber material layer 22222 stacked, wherein the fiber directions of the first unidirectional fiber material layer 22221 and the second unidirectional fiber material layer 22222 are not parallel. Optionally, the fiber directions of the first unidirectional fiber material layer 22221 and the second unidirectional fiber material layer 22222 can be perpendicular, thereby improving the overall strength of the fiber material layer 2222.

The thickness of the first unidirectional fiber material layer 22221 and the second unidirectional fiber material layer 22222 are both 0.025mm-0.03mm, specifically 0.025mm, 0.026mm, 0.027mm, 0.028mm, 0.03mm. The first unidirectional fiber material layer 22221 and the second unidirectional fiber material layer 22222 are both made of carbon fiber, and adjacent fiber material layers are bonded by resin glue.

Please refer to FIG. 8 , which is a schematic structural diagram of another embodiment of a support member of the present application. The support member 222 in this embodiment includes a first metal layer 2221 , a fiber material layer 2222 and a second metal layer 2223 which are stacked in sequence. Different from the above-mentioned embodiments, the fiber material layer 2222 in this embodiment includes a first unidirectional fiber material layer 22221, a second unidirectional fiber material layer 22222, and a third unidirectional fiber material layer 22223 which are stacked, the three unidirectional fiber material layers 22223 and the first unidirectional fiber material layer 22221 are respectively arranged on both sides of the second unidirectional fiber material layer 22222, the first unidirectional fiber material layer 22221 is connected to the first metal layer 2221 on the side away from the second unidirectional fiber material layer 22222, and the third unidirectional fiber material layer 22223 is connected to the second metal layer 2223 on the side away from the second unidirectional fiber material layer 22222; the fiber direction of the third unidirectional fiber material layer 22223 is not parallel to the fiber direction of the second unidirectional fiber material layer 22222. Optionally, the fiber directions of the third unidirectional fiber material layer 22223 and the second unidirectional fiber material layer 22222 are perpendicular.

In this embodiment, the thickness of the first unidirectional fiber material layer 22221, the second unidirectional fiber material layer 22222 and the third unidirectional fiber material layer 22223 are all 0.025mm-0.03mm, specifically 0.025mm, 0.026mm, 0.027mm, 0.028mm and 0.03mm. The first unidirectional fiber material layer 22221, the second unidirectional fiber material layer 22222 and the third unidirectional fiber material layer 22223 are all made of carbon fiber. Adjacent fiber material layers are connected by Resin glue bonding.

The preparation process of the support member 222 in this embodiment is as follows: first, the stainless steel sheet is nano-treated (the stainless steel substrate is placed in the configured pore-forming agent for chemical corrosion to form pores, and then the stainless steel substrate after pore formation is placed in the pore-expanding agent for pore-expanding treatment to form a coral-like irregular cavity structure, and finally the stainless steel substrate after pore expansion is placed in the pore-wetting agent for pore-wetting treatment to improve the bonding strength of its surface) or coated/printed with thermosetting glue (in order to improve the bonding strength of carbon fiber and stainless steel); then the stainless steel and carbon fiber are arranged in a designed layer and hot-pressed with a mold, the hot-pressing temperature is 140-160°C, the hot-pressing pressure is 20T-50T, and the pressure is maintained for 5-10 minutes after hot-pressing, and finally the hot-pressed composite material is shaped and punched to the required size. In addition, in some other embodiments, the fiber material layer can also be a fiber cloth structure, and the stainless steel sheet is directly hot-pressed with the fiber cloth without the need to apply resin glue.

The support structure of the flexible display screen in the embodiment of the present application provides a laminated structure of ultra-thin stainless steel + carbon fiber + ultra-thin stainless steel; the middle layer of the laminated structure is carbon fiber plus epoxy resin, which can reduce the weight of the product while providing a certain effective modulus and rigidity, and tightly combine the upper and lower layers of stainless steel together through epoxy resin; through the middle layer of carbon fiber plus epoxy resin, the weight of the entire product can be reduced by more than 50% on the basis of the overall stainless steel, that is, less than half of the original weight. The upper and lower layers of this laminated structure are stainless steel, and the high modulus of stainless steel is used to greatly improve the rigidity of the support plate; through the ultra-thin stainless steel on the surface, the rigidity of the entire product can be equal to that of carbon fiber of the same thickness. The following table compares the performance parameters of the support structure in the embodiment of the present application with conventional pure stainless steel structure supports and pure carbon fiber structure supports.

From the above comparison, it can be seen that the support structure in the embodiment of the present application has a lighter weight than the pure stainless steel solution, and compared with the pure carbon fiber solution, there is no need to add a conductive layer on the surface, which reduces the process difficulty and can reduce the thickness.

The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

A support member for a flexible display screen, characterized in that the support member comprises a first metal layer, a fiber material layer and a second metal layer which are stacked in sequence.
The support member according to claim 1 is characterized in that the fiber material layer comprises a first unidirectional fiber material layer and a second unidirectional fiber material layer which are stacked, wherein fiber directions of the first unidirectional fiber material layer and the second unidirectional fiber material layer are not parallel.
The support member according to claim 2, characterized in that fiber directions of the first unidirectional fiber material layer and the second unidirectional fiber material layer are perpendicular.
The support member according to claim 3 is characterized in that the fiber material layer also includes a third unidirectional fiber material layer, the three unidirectional fiber material layers and the first unidirectional fiber material layer are respectively arranged on both sides of the second unidirectional fiber material layer, the side of the first unidirectional fiber material layer facing away from the second unidirectional fiber material layer is connected to the first metal layer, and the side of the third unidirectional fiber material layer facing away from the second unidirectional fiber material layer is connected to the second metal layer; the fiber direction of the third unidirectional fiber material layer is not parallel to the fiber direction of the second unidirectional fiber material layer.
The support member according to claim 4, characterized in that fiber directions of the third unidirectional fiber material layer and the second unidirectional fiber material layer are perpendicular.
The support member according to claim 5 is characterized in that the thickness of the first unidirectional fiber material layer, the second unidirectional fiber material layer and the third unidirectional fiber material layer are all 0.025mm-0.03mm.
The support member according to claim 6 is characterized in that the materials of the first unidirectional fiber material layer, the second unidirectional fiber material layer and the third unidirectional fiber material layer are all carbon fiber, and adjacent fiber material layers are bonded by resin glue.
The support member according to claim 1 is characterized in that the material of the first metal layer and the second metal layer are both stainless steel, and the thickness of the first metal layer and the second metal layer are both 0.02 mm to 0.03 mm.
A display screen assembly, characterized in that the display screen assembly comprises a flexible display screen and a support member, wherein the support member is connected to a non-light emitting side of the flexible display screen and is stacked with the flexible display screen;

The support member includes a first metal layer, a fiber material layer and a second metal layer which are stacked in sequence.
The display screen assembly according to claim 9 is characterized in that the fiber material layer comprises a first unidirectional fiber material layer and a second unidirectional fiber material layer which are stacked, wherein fiber directions of the first unidirectional fiber material layer and the second unidirectional fiber material layer are not parallel.
The display screen assembly according to claim 10, wherein fiber directions of the first unidirectional fiber material layer and the second unidirectional fiber material layer are perpendicular.
The display screen assembly according to claim 11 is characterized in that the fiber material layer also includes a third unidirectional fiber material layer, the three unidirectional fiber material layers and the first unidirectional fiber material layer are respectively arranged on both sides of the second unidirectional fiber material layer, the side of the first unidirectional fiber material layer facing away from the second unidirectional fiber material layer is connected to the first metal layer, and the side of the third unidirectional fiber material layer facing away from the second unidirectional fiber material layer is connected to the second metal layer; the fiber direction of the third unidirectional fiber material layer is not parallel to the fiber direction of the second unidirectional fiber material layer.
The display screen assembly according to claim 12, characterized in that fiber directions of the third unidirectional fiber material layer and the second unidirectional fiber material layer are perpendicular.
The display screen assembly according to claim 13, characterized in that the thickness of the first unidirectional fiber material layer, the second unidirectional fiber material layer and the third unidirectional fiber material layer are all 0.025 mm-0.03 mm.
The display screen assembly according to claim 14 is characterized in that the first unidirectional fiber material layer, the second unidirectional fiber material layer and the third unidirectional fiber material layer are all made of carbon fiber, and adjacent fiber material layers are bonded by resin glue.
The display screen assembly according to claim 9 is characterized in that the first metal layer and the second metal layer are both made of stainless steel, and the thickness of the first metal layer and the second metal layer are both 0.02 mm to 0.03 mm.
An electronic device, characterized in that the electronic device comprises a housing and a display screen assembly; the housing comprises a first housing, a second housing and a shaft assembly; the first housing and the second housing are respectively connected to the shaft assembly, and the first housing and the second housing can rotate along with the shaft assembly; the display screen assembly is respectively connected to the first housing and the second housing and straddles the shaft assembly, and the display screen assembly can be folded or flattened along with the relative rotation of the first housing and the second housing;

The display screen assembly includes a flexible display screen and a support member, wherein the support member is connected to the non-light-emitting side of the flexible display screen and is stacked with the flexible display screen; the support member includes a first metal layer, a fiber material layer and a second metal layer which are stacked in sequence.
The electronic device according to claim 17 is characterized in that the fiber material layer comprises a first unidirectional fiber material layer and a second unidirectional fiber material layer which are stacked, wherein fiber directions of the first unidirectional fiber material layer and the second unidirectional fiber material layer are not parallel.
The electronic device according to claim 18 is characterized in that the fiber material layer also includes a third unidirectional fiber material layer, the three unidirectional fiber material layers and the first unidirectional fiber material layer are respectively arranged on both sides of the second unidirectional fiber material layer, the side of the first unidirectional fiber material layer facing away from the second unidirectional fiber material layer is connected to the first metal layer, and the side of the third unidirectional fiber material layer facing away from the second unidirectional fiber material layer is connected to the second metal layer; the fiber direction of the third unidirectional fiber material layer is not parallel to the fiber direction of the second unidirectional fiber material layer.
The electronic device according to claim 19 is characterized in that the fiber directions of the first unidirectional fiber material layer and the second unidirectional fiber material layer are perpendicular; and the fiber directions of the third unidirectional fiber material layer and the second unidirectional fiber material layer are perpendicular.