WO2023236867A1 - Line structure for mobile terminal, and mobile terminal - Google Patents

Abstract

The present application belongs to the technical field of apparatuses. Disclosed are a line structure for a mobile terminal, and a mobile terminal. The mobile terminal comprises a first circuit board and a second circuit board, wherein the first circuit board and the second circuit board are located in an inner cavity, which is formed by a housing and a flexible screen of the mobile terminal; the first circuit board is opposite a first screen area of the flexible screen, the second circuit board is opposite a second screen area of the flexible screen, and the first screen area and the second screen area are connected to each other by means of a foldable screen area of the flexible screen. The line structure comprises: a first foldable support sheet, which is located in the inner cavity; and a line layer, which is arranged on the surface of the first foldable support sheet, wherein the line layer is respectively connected to the first circuit board and the second circuit board.

Description

Line structure of mobile terminal and mobile terminal

Cross-references to related applications

This application claims priority to Chinese Patent Application No. 202210651576.9 filed in China on June 9, 2022, the entire content of which is incorporated herein by reference.

Technical field

The present application belongs to the field of equipment technology, and specifically relates to a circuit structure of a mobile terminal and a mobile terminal.

Background technique

With the breakthrough and development of flexible screen technology, foldable terminals have realized user needs for large screens, and also satisfied users’ visual experience needs in scenes such as browsing the web, playing games, or watching videos. In the pursuit of larger screens, At the same time, the portability and holding comfort of the mobile terminal are improved. Foldable terminals have the characteristics of portability, bendability and multi-angle hovering, and have broad market application prospects.

In order to adapt to the high folding frequency requirements of foldable terminals, in addition to the introduction of a more flexible screen, a line structure that can adapt to the bending of the folding terminal is also needed.

However, the circuit structure commonly used in folding terminals is currently a multi-layered structure. During the bending process, the circuit structure is easily deformed, resulting in a shorter service life of the circuit structure.

Contents of the invention

The purpose of the embodiments of the present application is to provide a line structure of a mobile terminal and a mobile terminal that can improve the service life of the line structure.

In a first aspect, embodiments of the present application provide a circuit structure of a mobile terminal. The mobile terminal includes a first circuit board and a second circuit board. The first circuit board and the second circuit board are located on the mobile terminal. In the inner cavity formed by the housing of the terminal and the flexible screen, the first circuit board is opposite to the first screen area of the flexible screen, and the second circuit board is opposite to the second screen area of the flexible screen, The first screen area and the second screen area are connected through a foldable screen area of the flexible screen;

The circuit structure includes:

A first foldable support piece located in the inner cavity;

A circuit layer is provided on the surface of the first foldable support sheet, and the circuit layer is connected to the first circuit board and the second circuit board respectively.

In a second aspect, embodiments of the present application provide a mobile terminal, including a casing, a flexible screen, a first circuit board, a second circuit board, and the circuit structure described in the first aspect.

The circuit structure of this embodiment is provided with a first foldable support piece. By providing a circuit layer on the surface of the first foldable support piece, even when the flexible screen of the mobile device is bent, the first foldable support piece is bent. The bending stress is mainly on the first foldable support piece, and the bending stress on the circuit layer is smaller, so the circuit layer is not easily deformed, thereby increasing the life of the circuit layer and thus the service life of the circuit structure.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

Figure 1 is one of the structural diagrams of a circuit structure according to an embodiment of the present application;

Figure 2 is the second structural diagram of a circuit structure according to an embodiment of the present application;

Figure 3 is one of the partial stacking diagrams of another circuit structure according to an embodiment of the present application;

Figure 4 is the third structural diagram of a circuit structure according to an embodiment of the present application;

Figure 5 is the second partial stacking diagram of a circuit structure according to an embodiment of the present application;

Figure 6 is a partial schematic diagram of a circuit structure according to an embodiment of the present application;

Figure 7 is one of the routing diagrams of wires in a foldable connection area of a circuit structure according to an embodiment of the present application;

Figure 8 is a second wiring diagram of conductors in a foldable connection area of a circuit structure according to an embodiment of the present application.

Reference numbers in Figures 1 to 8: 100. Mobile terminal; 101. First circuit board; 102. Second circuit board; 103. Housing; 104. Flexible screen; 105. Inner cavity; 110. First foldable support piece; 111, circuit layer; 112, first flexible circuit board; 113, second flexible circuit board; 114, third flexible circuit board; 115, second foldable support piece; 1151, third region; 1152, fourth Area; 1153. Foldable area; 1101. First area; 1102. Second area; 1103. Foldable connection area; 11031. Metal suspension wire; 11032. First hollow area; 11033. Second hollow area; 1041. First screen area; 1042, second screen area; 1043, foldable screen area; 1111, insulation layer; 1112, wire layer; 11121, wire; 120, connector.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood on a case-by-case basis.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the figures so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first,""second," etc. are distinguished Objects are usually of one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

The following describes the circuit structure according to the embodiment of the present application with reference to FIGS. 1 to 8 .

As shown in Figures 1-3, this application provides a circuit structure of a mobile terminal 100 according to an embodiment. The mobile terminal 100 includes a first circuit board 101 and a second circuit board 102. The first circuit board 101 and the second circuit board 102 is located in the inner cavity 105 formed by the casing 103 of the mobile terminal 100 and the flexible screen 104. The first circuit board 101 is opposite to the first screen area 1041 of the flexible screen 104, and the second circuit board 102 is opposite to the second screen of the flexible screen 104. Opposite the area 1042, the first screen area 1041 and the second screen area 1042 are connected through the foldable screen area 1043 of the flexible screen 104;

Line structure includes:

The first foldable support piece 110 is located in the inner cavity 105;

The circuit layer 111 is provided on the surface of the first foldable support sheet 110, and the circuit layer 111 is connected to the first circuit board 101 and the second circuit board 102 respectively.

The housing 103 can be a plastic housing 103, which can reduce the weight of the mobile terminal 100 and make the mobile terminal 100 more portable.

The flexible screen 104 includes a first screen area 1041, a second screen area 1042, and a foldable screen area 1043 connected between the first screen area 1041 and the second screen area 1042. The bending of the foldable screen area makes the mobile terminal 100 The flexible screen 104 is bent, the first circuit board 101 is opposite to the first screen area 1041 of the flexible screen 104, and the second circuit board 102 is opposite to the second screen area 1042 of the flexible screen 104. It can be understood that the first circuit board 101 Opposite to the different screen areas of the second circuit board 102 and the flexible screen 104, that is, the first circuit board 101 and the second circuit board 102 are located at different positions in the inner cavity, the circuit layer 111 is located in the inner cavity 105, the first foldable support sheet 110 may also be called a bendable support piece or a bendable support piece.

The circuit layer 111 may be directly electrically connected to the first circuit board 101 and the second circuit board 102 respectively, or may be electrically connected through other connectors (for example, conductive glue or thermal pressure welding components, etc.). The first circuit board 101 may also be called a main board and may be used to carry electronic components and transmit signals. The second circuit board 102 may also be called a secondary board and may be used to carry electronic components and transmit signals. The circuit layer 111 is connected to the first circuit board 101 and the second circuit board 102 respectively. The circuit layer 111 can transmit signals with the first circuit board 101 and can transmit signals with the second circuit board 102 .

The circuit structure of this embodiment is provided with a first foldable support piece 110. By providing a circuit layer 111 on the surface of the first foldable support piece 110, even when the flexible screen 104 of the mobile device is bent, the first foldable support The sheet 110 is bent, and the bending stress is mainly on the first foldable support sheet 110. The bending stress on the circuit layer 111 is smaller, and the circuit layer 111 is not easily deformed, thereby improving the life of the circuit layer 111 and further improving the efficiency of the circuit layer 111. Service life of line structures.

As an example, the first foldable support sheet 110 may be a first foldable metal sheet, with a maximum tolerable bending number of more than 300,000 times. The first foldable metal sheet includes but is not limited to foldable stainless steel sheets, etc. The use of foldable stainless steel sheets can prevent rust from interfering with normal communication of the circuit layer 111 integrated on the surface of the foldable stainless steel sheets and having a negative impact on the life of the circuit layer 111. And due to the properties of the first foldable metal sheet itself, it can withstand more bends and is not easily deformed. The circuit layer 111 is provided on the surface of the first foldable metal sheet, so that the overall circuit structure is not easily deformed and the circuit is improved. The service life of the structure.

As shown in FIG. 1 , in one embodiment, the first foldable support piece 110 is attached to the side of the flexible screen 104 facing the inner cavity 105 for supporting the flexible screen 104 , and the surface of the first foldable support piece 110 is the surface of the first foldable support piece 110 . The side facing the inner cavity 105.

The first foldable support sheet 110 not only functions to support the flexible screen 104, but also functions as an integrated circuit layer 111. After the circuit layer 111 is integrated on the surface of the first foldable support sheet 110, the first foldable support sheet 110 can be The sheet 110 is used as an integrated circuit metal sheet. It can be understood that a metal sheet can be shared to support the folding screen and arrange the circuit layer 111, thereby reducing the use of devices, thereby reducing the space occupied by the devices in the inner cavity 105. Moreover, the first foldable support piece 110 is attached to the side of the flexible screen 104, which can reduce the mobility of the first foldable support piece 110 in the inner cavity 105, thereby improving the stability of the circuit structure.

As shown in Figure 1, in one embodiment, the circuit structure also includes a first flexible circuit board 112 and a second flexible circuit board 113;

Among them, one end of the circuit layer 111 is connected to one end of the first circuit board 101 through the first flexible circuit board 112, the other end of the first circuit board 101 is connected to the flexible screen 104 through the first flexible circuit board 112, and the other end of the circuit layer 111 is connected through The second flexible circuit board 113 is connected to the second circuit board 102 .

One end of the circuit layer 111 and the first end of the first flexible circuit board 112 can be directly electrically connected, or they can be electrically connected through other connectors. For example, as shown in Figure 3, they are electrically connected through the connector 120. The circuit layer 111 is provided with There are guide holes for connecting wires on different layers 11121. The second end of the first flexible circuit board 112 and the first end of the first circuit board 101 can be electrically connected directly or through other connectors. In this way, one end of the circuit layer 111 is connected through the first flexible circuit board 112 The first end of the first circuit board 101 and one end of the circuit layer 111 can transmit signals between the first flexible circuit board 112 and the first circuit board 101 . The second end of the first circuit board 101 and the third end of the first flexible circuit board 112 can be electrically connected directly or through other connectors. The fourth end of the first flexible circuit board 112 and the flexible screen 104 can be directly connected. The electrical connection can also be electrically connected through other connectors. In this way, the second end of the first circuit board 101 can be connected to the flexible screen 104 through the first flexible circuit board 112, and the second end of the first circuit board 101 can be connected through the first flexible circuit board 112. Signals are transmitted between the circuit board 112 and the flexible screen 104 . The other end of the circuit layer 111 and one end of the second flexible circuit board 113 can be directly electrically connected, or they can be electrically connected through other connectors. The other end of the second flexible circuit board 113 can be directly electrically connected to the second circuit board 102, or they can be electrically connected. It can be electrically connected through other connectors, so that the other end of the circuit layer 111 can be connected to the second circuit board 102 through the second flexible circuit board 113, and the other end of the circuit layer 111 can be connected to the second circuit board through the second flexible circuit board 113. 102 to transmit signals. It should be noted that other connectors in various embodiments of the present application may include but are not limited to conductive glue or hot-pressed welding components.

In this embodiment, the circuit board used to connect the first circuit board 101 and the flexible screen 104 and to connect the first circuit board 101 and one end of the circuit layer 111 is a flexible circuit board. The circuit board used to connect the second circuit board 102 and one end of the circuit layer 111 is a flexible circuit board. The circuit board at the other end of the circuit layer 111 also uses a flexible circuit board, which can improve the flexibility of the circuit board, thereby improving the flexibility of the overall circuit structure. Even if the mobile terminal 100 is folded, the circuit structure is not easily deformed, which can increase the service life of the circuit structure. .

As shown in Figure 2, in one embodiment, the first foldable support piece 110 is spaced apart from the flexible screen 104. The circuit structure also includes a third flexible circuit board 114. One end of the first circuit board 101 passes through the third flexible circuit board. To connect the flexible screen 104, the other end of the first circuit board 101 is connected to one end of the second circuit board 102 through the circuit layer 111.

In this embodiment, the first foldable support sheet 110 is spaced apart from the flexible screen 104 so that the first foldable support piece 110 is There is a degree of freedom between a foldable support piece 110 and the flexible screen 104, which can prevent the flexible screen 104 from causing damage to the first foldable support piece 110 during the bending process. In addition, in one example, the foldable area of the first foldable support sheet 110 is arranged opposite to the foldable area of the flexible screen 104. In this way, during the bending process of the flexible screen 104, the foldable area of the first foldable support sheet 110 bending to improve bending performance.

As shown in Figure 2, in one embodiment, the circuit structure also includes a second foldable support piece 115, attached to the side of the flexible screen 104 facing the inner cavity 105, for supporting the flexible screen 104;

The second foldable support piece 115 is located between the flexible screen 104 and the first foldable support piece 110 , and the foldable area of the second foldable support piece 115 is opposite to the foldable area of the first foldable support piece 110 .

The second foldable support piece 115 can also be called a bendable support layer or a bendable support layer. The second foldable support piece 115 fits the side of the flexible screen 104 facing the inner cavity 105 and can lower the foldable metal support inside. The mobility in the cavity 105 improves the stability of the circuit structure, and the second foldable support piece 115 fits the flexible screen 104 and can provide support for the flexible screen 104. At the same time, the second foldable support piece 115 The foldable area is opposite to the foldable area of the first foldable support piece 110 . The foldable area of the second foldable support piece 115 and the foldable area of the first foldable support piece 110 can be bent along with the flexible screen 104 When bending, that is, when the flexible screen 104 is bent, the foldable area of the first foldable support sheet 110 is bent, and the foldable area of the second foldable support sheet 115 is bent, and the foldable area has a foldable Bending performance, thus improving the overall bending performance of the circuit structure.

As an example, the second foldable support sheet 115 may be a second foldable metal sheet, which may include but is not limited to a foldable stainless steel support layer. Due to the properties of the second foldable metal sheet itself, it can withstand more bends and is not easily deformed, making the circuit structure less susceptible to deformation and increasing the service life of the circuit structure. In addition, the second foldable support piece 115 of this embodiment may include a third region 1151, a fourth region 1152, and a foldable region of the second foldable support piece 115 connected between the third region 1151 and the fourth region 1152. 1153. The foldable area 1153 of the second foldable support piece 115 can be attached to the side of the foldable screen area 1043 facing the inner cavity 105, and the third area 1151 can be attached. Coherent with the side of the first screen area 1041 facing the inner cavity 105, the fourth area 1152 can be attached to the side of the second screen area 1042 facing the inner cavity 105. In this way, when the flexible screen 104 is bent, the foldable connection area 1103 of the first foldable support sheet 110 is bent, and the foldable area 1153 of the second foldable support sheet 115 is bent, and the foldable area has a foldable Bending performance, thus improving the overall bending performance of the circuit structure.

As shown in FIG. 2 , in one embodiment, the foldable area of the second foldable support sheet 115 is a foldable area of a hollow structure.

Since the foldable area of the second foldable support piece 115 is a foldable area with a hollow structure, during the bending process, due to the hollow area, the foldable area can extend along both sides to buffer the bending stress and improve the second foldable area. The bending performance of the foldable area of the foldable support piece 115 is improved, thereby improving the bending life of the second foldable support piece 115 .

As shown in Figures 1-2, in one embodiment, the first foldable support sheet 110 includes a first region 1101, a second region 1102, and a foldable connection connected between the first region 1101 and the second region 1102. Area 1103;

The foldable connection area 1103 is attached to the side of the foldable screen area 1043 facing the inner cavity 105 , or the foldable connection area 1103 is opposite to the foldable screen area 1043 and is arranged at intervals.

The foldable area of the first foldable support sheet 110 is the foldable connection area 1103. The foldable connection area 1103 is attached to the side of the foldable screen area 1043 facing the inner cavity 105, which can lower the first foldable support sheet. 110 in the inner cavity 105 to improve the stability of the circuit structure. Alternatively, the foldable connection area 1103 is opposite to the foldable screen area 1043 and is spaced apart. The spaced apart arrangement allows a degree of freedom between the first foldable support piece 110 and the flexible screen 104 to prevent the flexible screen 104 from colliding during the bending process. When the first foldable support piece 110 is damaged, the relative arrangement can bend the foldable area of the first foldable support piece 110 during the bending process of the folding screen, thereby improving the bending performance.

In one embodiment, the foldable connection area 1103 is a foldable area with a hollow structure. On the surface of the foldable connection area 1103 facing the inner cavity 105, the wires 11121 of the circuit layer 111 are in contact with the surface of the foldable connection area 1103. set up.

Since the foldable connection area 1103 is a foldable area with a hollow structure, during the bending process, due to the hollow area, the foldable connection area 1103 can extend along both sides to buffer the bending stress and improve the bending strength of the foldable connection area 1103. The folding performance can thereby improve the bending life of the foldable connection area 1103. At the same time, wiring can be performed on the surface of the foldable connection area 1103 facing the inner cavity 105. The wires 11121 of the circuit layer 111 are arranged in contact with the surface of the foldable connection area 1103, so that the wires 11121 in the foldable connection area 1103 can be connected. Surface wiring, in this way, on the surface of the foldable connection area 1103, the wires 11121 of the circuit layer 111 can be routed according to the shape of the surface of the foldable connection area 1103, which can improve the circuit layer 111 on the surface of the foldable connection area 1103 The wiring of wire 11121 is stable.

For example, as shown in Figures 4-6, the foldable connection area 1103 of the first foldable support sheet 110 includes a metal suspension wire 11031, and the metal suspension wire 11031 forms a hollow area. For example, as shown in Figure 4, the hollow area may include In the first hollow area 11032 and the second hollow area 11033, the wires 11121 of the circuit layer 111 can be routed on the surface of the metal suspension wire 11031 in the foldable connection area 1103.

As shown in Figure 7, it is a schematic diagram of the wiring (wiring) of the wire 11121 on the surface of the foldable connection area 1103 of the foldable connection area 1103 according to an embodiment. The wiring is routed along the black "ji" characters in Figure 7. In the hollow area in Figure 7, the surfaces of all metal suspension wires 11031 in the shape of "ji" can be wired. As shown in Figure 8, in addition to the wiring shape in Figure 7, there can be other wiring shapes. For example, the hollow structure of the foldable connection area 1103 can be comb-shaped, and the "one"-shaped metal suspension wire 11031 in Figure 8 The surface can be routed.

As shown in Figure 3, in one embodiment, the circuit layer 111 includes an insulating layer 1111 disposed on the surface of the first foldable support sheet 110 and a conductor layer 1112 disposed in the insulating layer 1111. The insulating layer 1111 is a high-frequency medium. Insulating layer 1111.

The line layer 111 can use a high-frequency dielectric insulation layer 1111, so that the line structure can transmit high-frequency signals and improve the signal transmission performance of the line structure. It should be noted that the conductor 11121 is a conductor in the conductor layer 1112 .

An embodiment of the present application also provides a mobile terminal 100, including a housing 103, a flexible screen 104, a first circuit board 101, a second circuit board 102, and the circuit structure of any one of the above embodiments.

The specific implementation of the line structure in the mobile terminal 100 may be referred to the description of the above line structure embodiment, and can achieve the same beneficial effects. To avoid repetition, no further description will be given.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like is intended to be incorporated into the description of the implementation. An example or example describes a specific feature, structure, material, or characteristic that is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the application is defined by the claims and their equivalents.

Claims (10)

1. A circuit structure of a mobile terminal. The mobile terminal includes a first circuit board and a second circuit board. The first circuit board and the second circuit board are located in an inner space formed by a housing of the mobile terminal and a flexible screen. In the cavity, the first circuit board is opposite to the first screen area of the flexible screen, the second circuit board is opposite to the second screen area of the flexible screen, and the first screen area is opposite to the third screen area. The two screen areas are connected through the foldable screen area of the flexible screen;

   The circuit structure includes:

   A first foldable support piece located in the inner cavity;

   A circuit layer is provided on the surface of the first foldable support sheet, and the circuit layer is connected to the first circuit board and the second circuit board respectively.
2. The circuit structure according to claim 1, wherein the first foldable support sheet is attached to a side of the flexible screen facing the inner cavity for supporting the flexible screen, and the surface is the A side of the first foldable support sheet facing the inner cavity.
3. The circuit structure according to claim 2, further comprising a first flexible circuit board and a second flexible circuit board;

   Wherein, one end of the circuit layer is connected to the first end of the first circuit board through the first flexible circuit board, and the second end of the first circuit board is connected to the flexible circuit board through the first flexible circuit board. The other end of the circuit layer is connected to the second circuit board through the second flexible circuit board.
4. The circuit structure according to claim 1, wherein the first foldable support piece is spaced apart from the flexible screen, the circuit structure further includes a third flexible circuit board, and one end of the first circuit board passes through the The third flexible circuit board is connected to the flexible screen, and the other end of the first circuit board is connected to one end of the second circuit board through the circuit layer.
5. The circuit structure according to claim 4, further comprising a second foldable support piece attached to a side of the flexible screen facing the inner cavity for supporting the flexible screen;

   The second foldable support piece is located between the flexible screen and the first foldable support piece, and the foldable area of the second foldable support piece and the foldable area of the first foldable support piece are Relative settings.
6. The circuit structure according to claim 5, wherein the foldable area of the second foldable support piece is a foldable area of a hollow structure.
7. The circuit structure according to claim 1, wherein the first foldable support sheet includes a first region, a second region and a foldable connection region connected between the first region and the second region;

   Wherein, the foldable connection area is attached to a side of the foldable screen area facing the inner cavity, or the foldable connection area is opposite to and spaced apart from the foldable screen area.
8. The circuit structure according to claim 7, wherein the foldable connection area is a foldable area of a hollow structure, and on the surface of the foldable connection area facing the inner cavity, the wires of the circuit layer and the Surface fit setup for foldable connection area.
9. The circuit structure according to claim 1, wherein the circuit layer includes an insulating layer provided on the surface of the first foldable support sheet and a conductor layer provided in the insulating layer, and the insulating layer is high Frequency dielectric insulation layer.
10. A mobile terminal includes a casing, a flexible screen, a first circuit board, a second circuit board and the circuit structure according to any one of claims 1 to 9.