CN117133190A

CN117133190A - Folding screen and foldable electronic device

Info

Publication number: CN117133190A
Application number: CN202310125154.2A
Authority: CN
Inventors: 丁才华; 郭学平
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-11-28

Abstract

The application discloses a folding screen and foldable electronic equipment, relates to the technical field of electronic equipment, and is used for improving stability and reliability of signal transmission between a first circuit board and a second circuit board in the foldable electronic equipment. Wherein, this foldable electronic device includes: the folding screen is provided with a first signal line layer, the first signal line layer comprises a first electric connection end and a second electric connection end, the first electric connection end is arranged on the first part, and the second electric connection end is arranged on the second part; the first circuit board is arranged in the first shell and is electrically connected with the first electric connecting end; the second circuit board is arranged in the second shell and is electrically connected with the second electric connection end so as to realize electric connection between the second circuit board and the first circuit board.

Description

Folding screen and foldable electronic device

Technical Field

The present application relates to the field of electronic devices, and in particular, to a folding screen and a foldable electronic device.

Background

Currently, in order to solve the problems of large size and inconvenient carrying of the conventional tablet device, a foldable electronic device has been developed. The foldable electronic device includes a first housing, a second housing, and a folding mechanism coupled between the first housing and the second housing. Because of communication, power supply, etc., the first circuit board in the first housing and the second circuit board in the second housing need to interact with a large number of electrical signals.

In the foldable electronic device in the related art, signal transmission between the first circuit board and the second circuit board is generally achieved through a through-shaft electrical connector, and electrical connection with an electronic device in the second housing is achieved through a connector (for example, a flexible circuit board). However, because the shaft penetrating electric connector is arranged on the folding mechanism in a penetrating way, and the shaft penetrating electric connector needs to be folded along with the folding of the folding screen, the folding performance of the shaft penetrating electric connector can be affected, so that the shaft penetrating electric connector is torn in the folding process, and the stability and reliability of signal transmission between the first circuit board and the second circuit board are affected.

Disclosure of Invention

The embodiment of the application provides a folding screen and foldable electronic equipment, which are used for improving the stability and reliability of signal transmission between a first circuit board and a second circuit board.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical scheme:

in a first aspect, an embodiment of the present application provides a foldable electronic device, including: the folding screen comprises a shell assembly, a folding screen, a first circuit board and a second circuit board, wherein the shell assembly comprises a first shell, a second shell and a folding mechanism, the folding mechanism is connected between the first shell and the second shell, and the first shell and the second shell can be folded and unfolded relatively; the folding screen comprises a first part and a second part, the first part is supported on the first shell, the second part is supported on the second shell, the folding screen is provided with a first signal wire layer, the first signal wire layer comprises a first electric connection end and a second electric connection end, the first electric connection end is arranged on the first part, and the second electric connection end is arranged on the second part; the first circuit board is arranged in the first shell and is electrically connected with the first electric connecting end; the second circuit board is arranged in the second shell and is electrically connected with the second electric connection end so as to realize electric connection between the second circuit board and the first circuit board.

According to the foldable electronic equipment provided by the embodiment of the application, the first signal line layer is arranged in the folding screen, so that the first circuit board and the second circuit board can realize signal and data transmission through the first signal line layer, and signals between related electronic devices in the first shell and the second shell can be communicated. And, because the first electric connection end and the first circuit board of the first signal line layer are located on the same side of the folding mechanism, the second electric connection end and the second circuit board of the first signal line layer are located on the same side of the folding mechanism, and the electric connection structure between the first electric connection end and the first circuit board and the electric connection structure between the second electric connection end and the second circuit board do not need to pass through the folding mechanism.

Therefore, when the first signal line layer comprises all the lines for signal transmission between the first circuit board and the second circuit board, all the signal connection between the first circuit board and the second circuit board can be realized without arranging a through shaft electric connector, the assembly difficulty of the foldable electronic device can be reduced, the folding performance of the folding mechanism is ensured, the thickness of the folding mechanism and the thickness of the whole foldable electronic device can be reduced, and the light and thin design of the foldable electronic device is facilitated. In addition, as the shaft penetrating electric connector is not required to be arranged, the foldable electronic equipment provided by the embodiment of the application has no reliability problems such as tearing of the shaft penetrating electric connector, and the stability and reliability of signal transmission between the first circuit board and the second circuit board can be ensured.

In addition, when the first signal line layer comprises part of lines for signal transmission between the first circuit board and the second circuit board and the other part of lines still need to be connected through the shaft penetrating electric connecting piece, the thickness or the width of the shaft penetrating electric connecting piece can be reduced, on one hand, the bending radius of the shaft penetrating electric connecting piece can be reduced, and further, the gap between the first display surface and the second display surface when the folding screen is in a folding state can be reduced, so that the thickness of the foldable electronic equipment in the folding state can be reduced; on the other hand, after the thickness of the shaft penetrating electric connecting piece is reduced, the bending performance of the shaft penetrating electric connecting piece can be improved, layering phenomenon of the shaft penetrating electric connecting piece in the bending process is avoided, and the reliability of the shaft penetrating electric connecting piece can be improved, so that the stability and the reliability of signal transmission between the first circuit board and the second circuit board can be ensured as well; on the other hand, the size of the shaft penetrating electric connecting piece can be reduced, and the occupied space of the shaft penetrating electric connecting piece in the folding mechanism can be reduced, so that the thickness of the folding mechanism and the thickness of the foldable electronic equipment can be reduced, and the light and thin design of the foldable electronic equipment can be realized.

In a possible implementation manner of the first aspect, the folding screen includes a plurality of film layers that are stacked, and the first signal line layer is disposed in one of the plurality of film layers, or the first signal line layer is disposed on a surface of one of the plurality of film layers. Therefore, the stability and the reliability of signal transmission between the first circuit board and the second circuit board can be ensured, and the design of the foldable electronic equipment is light and thin.

In one possible implementation manner of the first aspect, the first portion includes a first display portion and a first terminal portion, the first terminal portion is connected to a side edge of the first display portion, the first terminal portion includes a bent state, when the first terminal portion is in the bent state, the first terminal portion is located on a side of the first display portion, which is close to the housing assembly, a first external connection terminal is disposed on the first terminal portion, the first electrical connection end is electrically connected with the first external connection terminal, and the first external connection terminal is electrically connected with the first circuit board. Therefore, the first flexible electric connecting piece for electrically connecting the first electric connecting end and the first circuit board can be electrically connected with the first external terminal and the first circuit board, and the assembly difficulty of the foldable electronic equipment can be reduced.

In a possible implementation manner of the first aspect, the folding screen includes a substrate board and a display layer that are stacked, and the first signal line layer is disposed in the substrate board. Like this, through setting up first signal line layer in substrate base plate, be convenient for realize the electricity between first circuit board and the second circuit board and be connected, and can increase the interval distance between first signal line layer and the second signal line layer in the display layer, be favorable to reducing the signal interference of first signal line layer to the second signal line layer, and then be favorable to improving the display effect of folding screen.

In a possible implementation manner of the first aspect, a first conductive structure is disposed in the folding screen, one end of the first conductive structure is electrically connected to the first electrical connection end, and the other end of the first conductive structure is electrically connected to the first external connection terminal. Optionally, the first conductive structure is a metallized via. In this way, the first signal line layer is conveniently integrated in the folding screen, and the electrical connection between the first signal line layer and the first circuit board is conveniently realized.

In a possible implementation manner of the first aspect, the first electrical connection terminal is disposed at the first terminal portion. Therefore, the first conductive structure can extend along the lamination direction of the substrate base plate and the display layer, the structure of the first conductive structure can be simplified, and the processing difficulty of the first conductive structure is reduced.

In a possible implementation manner of the first aspect, the folding screen includes a substrate board and a display layer that are stacked, and the first signal line layer is disposed on the display layer. Providing another arrangement position of the first signal line layer.

In a possible implementation manner of the first aspect, the display layer includes a second signal line layer and a light emitting device, the light emitting device is electrically connected to the second signal line layer, and the first signal line layer is disposed in a same layer as the second signal line layer. Therefore, in the processing process, the first signal line layer and the second signal line layer can be synchronously formed, and the first electric connection end of the first signal line layer is convenient to be electrically connected with the first external connection terminal.

In a possible implementation manner of the first aspect, the foldable electronic device further includes a first flexible electrical connector, and the first external connection terminal and the first circuit board are electrically connected through the first flexible electrical connector; the display layer comprises a second signal line layer and a light emitting device, the light emitting device is electrically connected with the second signal line layer, and the second signal line layer is electrically connected with the first circuit board through a first flexible electric connector.

In a possible implementation manner of the first aspect, a second conductive structure is disposed in the folding screen, one end of the second conductive structure is electrically connected to the second electrical connection terminal, and the other end of the second conductive structure is electrically connected to the second circuit board. The other end of the second conductive structure can be directly and electrically connected with the second circuit board, or can be indirectly and electrically connected with the second circuit board through other conductive structures. In this way, it is facilitated to make an electrical connection between the second electrical connection terminal and the second circuit board.

In a possible implementation manner of the first aspect, the other end of the second conductive structure is exposed at a surface of the side of the substrate facing away from the display layer.

In a possible implementation manner of the first aspect, the second electrical connection terminal is disposed at the second display portion. In this way, it is facilitated to make an electrical connection between the second electrical connection terminal and the second circuit board.

In a possible implementation manner of the first aspect, the first portion includes a first display portion, a side surface of the first display portion facing away from the first housing forms a first display surface, and the first electrical connection end is located in the first display portion.

In a possible implementation manner of the first aspect, the folding screen includes a substrate board and a display layer that are stacked, the first signal line layer is disposed in the substrate board, a surface of a side of the substrate board facing away from the display layer is provided with a first opening, and the first electrical connection end is exposed in the first opening. Thus, the first electric connection end is convenient to be electrically connected with the first circuit board. For example, the first electrical connection end may be electrically connected to the first flexible electrical connector, and the first electrical connection end and the first circuit board are electrically connected through the first flexible electrical connector.

In a possible implementation manner of the first aspect, the first portion includes a first terminal portion, the first terminal portion is connected to a side edge of the first display portion, the first terminal portion includes a bent state, and in the bent state, a portion of the first terminal portion is located on a side of the first display portion facing away from the first display surface; when the first terminal part is in a bending state, the orthographic projection of the first electric connection end on the first display surface is not overlapped with the orthographic projection of the first terminal part on the first display surface. Therefore, interference of the first terminal part in the electric connection process of the first electric connection end and the first flexible electric connection piece can be avoided, and electric connection difficulty between the first electric connection end and the first flexible electric connection piece is reduced.

In a possible implementation manner of the first aspect, the folding screen includes a plurality of film layers that are stacked, the plurality of film layers including a display layer, the display layer including a second signal line layer and a light emitting device, the light emitting device being electrically connected to the second signal line layer; the first signal line layer and the second signal line layer are arranged at intervals in the lamination direction of the plurality of film layers; a first grounding layer is arranged in the folding screen, the first grounding layer is located between the first signal line layer and the second signal line layer, and the first signal line layer is electrically connected with the first grounding layer. Therefore, through setting up first ground layer between first signal line layer and second signal line layer, be convenient for realize the ground connection on first signal line layer on the one hand, and can realize backward flow, accuse impedance through first ground layer, on the other hand, can separate first signal line layer and second signal line layer through first ground layer, can play the isolation effect, avoid first signal line layer to cause the interference to the second signal line layer, can improve the stability and the reliability on second signal line layer, and then can improve the display effect of folding screen.

In a possible implementation manner of the first aspect, a shielding metal layer is further disposed in the folding screen, the shielding metal layer is located between the second signal line layer and the first grounding layer, and in a stacking direction of the plurality of film layers, the first grounding layer and the second signal line layer are spaced from the shielding metal layer. Therefore, the first signal line layer and the first grounding layer can be separated from the second signal line layer through the shielding metal layer, interference of the first signal line layer and the first grounding layer to the second signal line layer is avoided, stability and reliability of the second signal line layer can be further improved, and further display effect of the folding screen can be further improved.

In a possible implementation manner of the first aspect, the shielding metal layer is located within the substrate base plate. Illustratively, the shielding metal layer is disposed within the first barrier layer or the second substrate layer.

In a possible implementation manner of the first aspect, the folding screen includes a substrate and a display layer that are stacked, where the substrate includes: the first substrate layer comprises a first surface facing the display layer, and the first signal line layer is arranged on the first surface; the first barrier layer is arranged on the first surface and wraps the first signal line layer; the second substrate layer is arranged on one side of the first barrier layer, which is away from the first substrate layer. Simple structure and convenient processing.

In a possible implementation manner of the first aspect, the second portion includes a second display portion, a side surface of the second display portion facing away from the second housing forms a second display surface, and the second electrical connection terminal is disposed on the second display portion. In this way, it is facilitated to make an electrical connection between the second electrical connection terminal and the second circuit board.

In a possible implementation manner of the first aspect, the second portion includes a second display portion and a second terminal portion, the second terminal portion is connected to an edge of one side of the second display portion, the second terminal portion includes a bent state, when the second terminal portion is in the bent state, the second terminal portion is located on a side of the second display portion, which is close to the second housing, a third external connection terminal is disposed on the second terminal portion, and the second electrical connection end is electrically connected to the third external connection terminal. Therefore, the second electric connection end can be electrically connected with the second circuit board by means of the third external connection terminal, so that a second opening is not required to be arranged on the substrate, and the processing difficulty of the folding screen is reduced.

In one possible implementation manner of the first aspect, the first signal line layer includes a base layer and a body layer, and the body layer is located on a side of the base layer facing away from the first substrate layer; the material of the priming layer is titanium, and the material of the body layer comprises copper or aluminum. The titanium, copper and aluminum all have excellent conductivity, so that the signal transmission efficiency of the first signal wire layer can be ensured, and the titanium, the first substrate layer, the copper and the aluminum all have better combination capability. Therefore, the first signal line layer can be effectively prevented from falling off from the first substrate layer, and stability and reliability of signal transmission between the first circuit board and the second circuit board can be ensured.

In one possible implementation of the first aspect, the thickness of the primer layer is between 0.3 μm and 0.8 μm.

In one possible implementation of the first aspect, the thickness of the body layer may be 2 μm to 5 μm.

In a possible implementation manner of the first aspect, the first middle frame is provided with a first through hole, and the first flexible electrical connector is arranged through the first through hole. Like this, the both ends of first flexible electric connecting piece can wear to establish to the both sides on the first middle frame thickness direction from first wearing to establish the hole respectively, and specifically, the one end of first flexible electric connecting piece is located the one side towards folding screen of first middle frame, and the other end of first flexible electric connecting piece is located the one side towards first back of the body lid of first middle frame, and the both ends of being convenient for first flexible electric connecting piece are connected with first electric connection end and first circuit board electricity respectively.

In a possible implementation manner of the first aspect, a second through hole is provided on the second middle frame, and the second flexible electrical connector is disposed through the second through hole. Like this, the both ends of second flexible electric connecting piece can wear to establish to the both sides in second center thickness direction from the second hole of wearing respectively, and specifically, the one end of second flexible electric connecting piece is located the one side towards folding screen of second center, and the other end of second flexible electric connecting piece is located the one side towards second back of the body lid of second center, and the both ends of second flexible electric connecting piece of being convenient for are connected with second electric connection end and second circuit board electricity respectively.

In a second aspect, the present application provides a folding screen, applied to a foldable electronic device, where the foldable electronic device includes a housing assembly, a first circuit board and a second circuit board, the housing assembly includes a first housing, a second housing and a folding mechanism, the first housing and the second housing are respectively connected to opposite sides of the folding mechanism, the first housing and the second housing can be folded and unfolded relatively, the first circuit board is located in the first housing, the second circuit board is located in the second housing, and the folding screen includes: the first part and the second part, the first part supports in first casing, the second part supports in the second casing, the folding screen has first signal line layer, first signal line layer includes first electric connection end and second electric connection end, first electric connection end sets up in first part, the second electric connection end sets up in the second part, first electric connection end is used for being connected with first circuit board electricity, the second electric connection end is used for being connected with second circuit board electricity, in order to realize the electric connection between second circuit board and the first circuit board.

In a possible implementation manner of the second aspect, the folding screen includes a plurality of film layers that are stacked, and the first signal line layer is disposed in one of the plurality of film layers, or the first signal line layer is disposed on a surface of one of the plurality of film layers.

In a third aspect, the present application provides a method for manufacturing a folding screen, comprising: providing a rigid carrier plate, and forming a first substrate layer on the rigid carrier plate; forming a first signal line layer on the first substrate layer; forming other film layers of the folding screen.

The technical effects caused by any one of the design manners in the second aspect may be referred to the technical effects caused by the different design manners in the first aspect, which are not described herein.

Drawings

Fig. 1 is a schematic structural diagram of a foldable electronic device according to some embodiments of the present application;

FIG. 2 is an exploded view of the foldable electronic device of FIG. 1 with the folding screen removed;

FIG. 3 is a schematic view of the foldable electronic device shown in FIG. 1 in an unfolded state;

FIG. 4 is a schematic view of the foldable electronic device of FIG. 1 in a folded state of the folding screen;

FIG. 5 is a schematic view of a folding screen according to some embodiments of the present application;

FIG. 6 is a top view of a foldable electronic device according to some embodiments of the present application, looking from a housing assembly into a folding screen after hiding a first back cover and a second back cover;

FIG. 7 is a cross-sectional view of a foldable electronic device provided in some embodiments of the present application;

FIG. 8 is a cross-sectional view of a foldable electronic device provided in further embodiments of the present application;

FIG. 9a is a top view of a folding screen in the foldable electronic device of FIG. 8;

FIG. 9b is a top view of a portion of the structure of the foldable electronic device of FIG. 8;

FIG. 10 is a schematic view of the stacked structure of the folding screen of FIG. 9 a;

FIG. 11 is a schematic view of electrical connection between the folding screen of FIG. 10 and the first and second flexible electrical connectors;

FIG. 12 is an enlarged view of the area A of the cross-sectional view of FIG. 8;

FIG. 13a is a schematic view of the structure of a substrate board in the folding screen of FIG. 10;

FIG. 13b is a schematic view of a portion of the folding screen of FIG. 10;

FIG. 14 is a schematic view of a first signal line layer and a first substrate layer in the substrate board shown in FIG. 13 a;

FIG. 15 is a schematic view of a first signal line layer and a first substrate layer according to other embodiments of the present application;

FIG. 16 is a schematic view of a first signal line layer and a first substrate layer provided in accordance with further embodiments of the present application;

FIG. 17 is a schematic view of a stacked structure of a folding screen according to other embodiments of the present application;

FIG. 18 is a flowchart of a method of making a folding screen according to some embodiments of the present application;

FIG. 19 is a schematic view of an assembled structure of a folding screen, a first flexible electrical connector and a second flexible electrical connector according to still other embodiments of the present application;

FIG. 20 is a schematic view of an assembled structure of a folding screen, a first flexible electrical connector and a second flexible electrical connector according to still other embodiments of the present application;

FIG. 21 is a schematic view of an assembled structure of a folding screen, a first flexible electrical connector and a second flexible electrical connector according to still other embodiments of the present application;

fig. 22 is a schematic diagram of an assembly structure of a folding screen, a first flexible electrical connector and a second flexible electrical connector according to still other embodiments of the present application.

Reference numerals:

100. a foldable electronic device;

10. a housing assembly; 11. a first housing; 111. a first middle frame; 112. a first back cover; 12. a second housing; 121. a second middle frame; 122. a second back cover; 13. a folding mechanism;

20. folding the screen; 21. a first portion; 21a, a first display surface; 211. a first display unit; 212. a first terminal portion; 2121. an external terminal; 2121a, a first external terminal; 2121b, second external terminals; 22. a second portion; 22a, a second display surface; 221. a second display unit; 222. a second terminal portion; 2221. a third external terminal; 23. a third section; 23a, a third display surface; 201. a first signal line layer; 201a, a first electrical connection; 201b, a second electrical connection; 201c, priming; 201d, a body layer; 2011. a first signal line; 2012. a second signal line; 202. a substrate base; 2021. a first substrate layer; 2021a, first surface; 2021b, second surface; 2021c, first groove; 2021d, second grooves; 2021e, first openings; 2021f, second opening; 2021g, third opening; 2022. a first barrier layer; 2023. a second substrate layer; 203. a display layer; 2031. a driving circuit layer; 2031a, a first gate insulating layer; 2031b, a second gate insulating layer; 2031c, an interlayer insulating layer; 2031d, planarization layer; 2031f, thin film transistor; 2031g, second signal line layer; 2032. a light emitting layer; 2032a, a pixel defining layer; 2032b, a light emitting device; 2033. an encapsulation layer; 204. a buffer layer; 205. a light-transmitting cover plate; 206. a protective layer; 207. a support layer; 2071. a hollow structure; 208. a first ground layer; 209. a shielding metal layer; 24. an anisotropic conductive adhesive film; 25. a board-to-board connector; 261. a first conductive structure; 261a, a first conductive segment; 261b, a second conductive segment; 261c, a third conductive segment; 262. a second conductive structure; 2621. a conductive structure body; 2622. an external bonding pad; 281. a rigid carrier plate; 282. a first bore section; 283. a third bore section; 284. a source hole; 285. a drain hole; 31. a first circuit board; 32. a second circuit board; 33. a third circuit board; 34. a fourth circuit board; 41. a first battery; 42. a second battery; 51. a first flexible electrical connection; 52. a second flexible electrical connection; 53. a third flexible electrical connection; 54. a shaft-penetrating electric connector; 61. and driving the chip.

Detailed Description

In embodiments of the present application, the terms "exemplary" or "such as" and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In embodiments of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of embodiments of the application, the term "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

In the description of the embodiment of the present application, "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In describing embodiments of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "electrically connected" should be construed broadly, and for example, "connected" may be either detachably connected or non-detachably connected; may be directly connected or indirectly connected through an intermediate medium. "electrically connected" may be directly electrically connected or indirectly electrically connected via an intermediary. Wherein, "fixedly connected" means that the relative positional relationship is unchanged after being connected with each other. "rotationally coupled" means coupled to each other and capable of relative rotation after coupling. "slidingly coupled" means coupled to each other and capable of sliding relative to each other after being coupled.

References to directional terms in the embodiments of the present application, such as "inner", "outer", "upper", "lower", "front", "rear", "left", "right", etc., are merely with reference to the directions of the drawings, and thus are used for better, more clear explanation and understanding of the embodiments of the present application, rather than to indicate or imply that the apparatus or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The embodiment of the application provides a foldable electronic device which is a type of electronic device provided with a folding screen and capable of changing the unfolding or folding modes of the folding screen and the foldable electronic device. Under different use demands, the foldable electronic equipment can be unfolded to an unfolding state, can be folded to a folding state and can be in an intermediate state between the unfolding state and the folding state. That is, the foldable electronic device has at least two states, namely an unfolded state and a folded state. In some cases, a third state, intermediate between the unfolded state and the folded state, may also be further included. It will be appreciated that the intermediate state is not the only state, but may be any state or states of the foldable electronic device between the unfolded state and the folded state.

Specifically, the foldable electronic device includes, but is not limited to, electronic devices such as a mobile phone, a tablet computer (tablet personal computer), a laptop computer (laptop computer), a personal digital assistant (personal digital assistant, PDA), a personal computer, a notebook computer (notebook), a vehicle-mounted device, and a wearable device (e.g., a wristwatch).

Referring to fig. 1, fig. 1 is a schematic structural diagram of a foldable electronic device 100 according to some embodiments of the present application, and in this embodiment and the following embodiments, the foldable electronic device 100 is a foldable mobile phone for exemplary illustration. The foldable electronic device 100 includes a housing assembly 10, a folding screen 20, a first circuit board 31, a second circuit board 32, a third circuit board 33, a fourth circuit board 34, a first battery 41, and a second battery 42. Among them, the first circuit board 31, the second circuit board 32, the third circuit board 33, the fourth circuit board 34, the first battery 41, and the second battery 42 are located inside the foldable electronic device 100, and thus outline is shown with broken lines.

It will be appreciated that fig. 1 only schematically illustrates some of the components comprised by the foldable electronic device 100, the actual shape, actual size, actual location and actual configuration of which are not limited by fig. 1. For example, in other embodiments, the foldable electronic device 100 may not include at least one of the third circuit board 33 and the fourth circuit board 34.

The housing assembly 10 is adapted to carry a folding screen 20 and to house and protect the internal electronics of the foldable electronic device 100. Referring to fig. 1, the housing assembly 10 includes a first housing 11, a second housing 12, and a folding mechanism 13. The folding mechanism 13 is connected between the first housing 11 and the second housing 12. The first housing 11 and the second housing 12 can be folded or unfolded relatively by means of the folding mechanism 13.

For convenience of description of the embodiments below, an XYZ coordinate system is established for the folding mechanism 13. Specifically, the length direction of the folding mechanism 13 is defined as the Y-axis direction, that is, the extending direction of the rotation axis of the first housing 11 is defined as the Y-axis direction, the thickness direction of the folding mechanism 13 is defined as the Z-axis direction, and the width direction of the folding mechanism 13 is defined as the X-axis direction. It is to be understood that the coordinate system setting may be flexibly set according to actual needs, which is not specifically limited herein.

Referring to fig. 1, the first housing 11 and the second housing 12 may be located on two sides of the folding mechanism 13 in the width direction (i.e., the X-axis direction), respectively. At least one of the first housing 11 and the second housing 12 is rotatably connected to the folding mechanism 13. It will be appreciated that in other embodiments at least one of the first housing 11, the second housing 12 may also be slidably coupled to the folding mechanism 13. The connection mode between the first housing 11 and the folding mechanism 13 and the connection mode between the second housing 12 and the folding mechanism 13 are not limited in the present application, as long as the first housing 11 and the second housing 12 can be relatively folded and unfolded by means of the folding mechanism 13.

In addition, the case assembly 10 is exemplified as including two cases of the first case 11 and the second case 12 in the embodiment of the present application, and it is understood that the case assembly 10 may include three cases, four cases, or more in other embodiments. In this way, the foldable electronic device 100 can be folded multiple times, which is beneficial to further reducing the volume of the foldable electronic device 100 in the folded state.

Referring to fig. 2, fig. 2 is an exploded view of the foldable electronic device 100 shown in fig. 1 after the folding screen 20 is removed. The first housing 11 includes a first middle frame 111 and a first back cover 112. A first receiving cavity is formed between the first middle frame 111 and the first back cover 112, and the first battery 41, the first circuit board 31, and the third circuit board 33 are received in the first receiving cavity. The second housing 12 includes a second middle frame 121 and a second back cover 122. A second accommodating cavity is formed between the second middle frame 121 and the second back cover 122, and the second battery 42, the second circuit board 32 and the fourth circuit board 34 are accommodated in the second accommodating cavity.

Folding screen 20 can be used to display information and provide an interactive interface for a user. In various embodiments of the present application, the folding screen 20 may be, but is not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini-led (mini organic light-emitting diode) display screen, a micro-led (micro organic light-emitting diode) display screen, a micro-organic led (micro organic light-emitting diode) display screen, or a quantum dot led (quantum dot light emitting diodes, QLED) display screen, etc.

The folding screen 20 is switchable between an unfolded state and a folded state. Referring to fig. 3, fig. 3 is a schematic structural diagram of the foldable electronic device 100 shown in fig. 1 when the folding screen 20 is in an unfolded state. The folding screen 20 comprises a first portion 21, a second portion 22 and a third portion 23, the third portion 23 being connected between the first portion 21 and the second portion 22. The first portion 21 is supported by the first housing 11, the second portion 22 is supported by the second housing 12, and the third portion 23 is supported by the folding mechanism 13. The first portion 21 comprises a first display surface 21a, the second portion 22 comprises a second display surface 22a, and the third portion 23 comprises a third display surface 23. When the folding screen 20 is in the unfolded state, the first display surface 21a, the second display surface 22a and the third display surface 23 are arranged coplanar and face the same direction. In this state, can realize the large-scale display, can provide richer information for the user, bring better use experience for the user.

Referring to fig. 4, fig. 4 is a schematic structural diagram of the foldable electronic device 100 shown in fig. 1 when the folding screen 20 is in a folded state. When the folding screen 20 is in the folded state, the third portion 23 is in the folded state, and the first display surface 21a (not shown in fig. 4) is opposite to the second display surface 22a (not shown in fig. 4). The folding screen 20 is invisible to the user, and the housing assembly 10 is protected outside the folding screen 20 to prevent the folding screen 20 from being scratched by hard objects, and such folding screen 20 mobile phone is an inward folding screen mobile phone. In other embodiments, when the folding screen 20 is in the folded state, the first display surface 21a and the second display surface 22a may also face away from each other, and in the exposed state, such a folding screen 20 mobile phone is an out-folded folding screen mobile phone.

In order to facilitate the electrical connection between the folding screen 20 and a circuit board (e.g., the first circuit board 31), please refer to fig. 5, fig. 5 is a schematic diagram of the folding screen 20 according to some embodiments of the present application. The first portion 21 of the folding screen 20 includes a first display portion 211 and a first terminal portion 212. The first display surface 21a is formed on the first display portion 211, and the first terminal portion 212 is connected to one side edge of the first display portion 211. Illustratively, the first terminal portion 212 is connected to a side edge of the first display portion 211 remote from the second portion 22. It will be appreciated that in other embodiments, the first terminal portion 212 may be connected to other edges of the first display portion 211.

The first terminal portion 212 is provided with external terminals 2121 (for example, a first external terminal 2121a and a second external terminal 2121b mentioned later), and the folding screen 20 can be electrically connected to an external circuit via the external terminals 2121. Optionally, the external connection terminal 2121 is a pad of a gold finger (connecting finger).

The first terminal portion 212 includes a bent state, and specifically, referring to fig. 5, the first terminal portion 212 can be bent toward a direction away from the first display surface 21a relative to the first display portion 211. When the first terminal portion 212 is in a bent state (a state of the first terminal portion 212 shown by a broken line in fig. 5), a part of the first terminal portion 212 is located on a side of the folding screen 20 facing away from the first display surface 21 a. In this state, the external terminal 2121 is located on a side surface of the first terminal portion 212 facing away from the first display surface 21 a. In this way, the difficulty of electrical connection between the external terminal 2121 and the circuit board can be reduced, and the first terminal portion 212 can be hidden inside the foldable electronic device 100 when assembled.

The first circuit board 31 and the second circuit board 32 may be used for an integrated control chip. The first circuit board 31 and the second circuit board 32 may serve as a main board. One of the first circuit board 31 and the second circuit board 32 may be electrically connected to the folding screen 20 to control the folding screen 20 to display images or videos.

The third circuit board 33 and the fourth circuit board 34 may be used for integrating electronic components such as an antenna (e.g., a 5G antenna) rf front end, a universal serial bus (universal serial bus, USB) device, and a vibrator. The third circuit board 33 is electrically connected to the first circuit board 31, and the fourth circuit board 34 is electrically connected to the second circuit board 32.

The first battery 41 is used to supply electric power to the first circuit board 31, the third circuit board 33, and the like. The second battery 42 is used to supply power to the second circuit board 32, the fourth circuit board 34, and so on.

Referring to fig. 6, fig. 6 is a top view of the foldable electronic device 100 according to some embodiments of the present application, after the first back cover 112 and the second back cover 122 are hidden, the foldable screen 20 is seen from the housing assembly 10. The first battery 41 is located between the first circuit board 31 and the third circuit board 33, and the second battery 42 is located between the second circuit board 32 and the fourth circuit board 34.

In order to realize electrical connection between the first circuit board 31 and the second circuit board 32 for signal and data transmission between the two, and further to communicate signals between related electronic devices inside the first housing 11 and the second housing 12, please refer to fig. 6 and fig. 7, fig. 7 is a cross-sectional view of a foldable electronic device 100 according to some embodiments of the present application. The foldable electronic device 100 includes a through-shaft electrical connector 54, and the first circuit board 31 and the second circuit board 32 are connected to the through-shaft electrical connector 54, respectively. Specifically, the electrical connection between the first circuit board 31 and the through-shaft electrical connector 54, and the electrical connection between the second circuit board 32 and the through-shaft electrical connector 54 may be achieved through a board-to-board (BTB) connector 25.

With continued reference to fig. 6 and 7, the shaft-penetrating electrical connector 54 is disposed through the folding mechanism 13, where the shaft-penetrating electrical connector 54 may be a flexible circuit board (flexible printed circuit, FPC) or a signal harness. In this way, electrical connection between the first circuit board 31 and the second circuit board 32 is facilitated, and the through-shaft electrical connector 54 can be adapted to the unfolding and folding of the foldable electronic device 100. However, since the shaft-penetrating electric connector 54 is penetrating through the folding mechanism 13, and the shaft-penetrating electric connector 54 needs to be folded along with folding of the folding screen 20, during assembly, the assembly requirement on the shaft-penetrating electric connector 54 is high, and since a part of the shaft-penetrating electric connector 54 is located inside the folding mechanism 13, the bending performance of the shaft-penetrating electric connector 54 may be affected, so that the shaft-penetrating electric connector 54 is torn in the bending process, and the reliability of the shaft-penetrating electric connector 54 is affected. In addition, in the assembly process, an assembly space of the shaft penetrating electric connector 54 needs to be reserved in the folding mechanism 13, which is not beneficial to reducing the thickness of the folding mechanism 13 and the thickness of the whole foldable electronic device 100, and is not beneficial to realizing the light and thin design of the foldable electronic device 100.

In order to solve the above-mentioned problems, please refer to fig. 8 and 9a, fig. 8 is a cross-sectional view of a foldable electronic device 100 according to other embodiments of the present application. Fig. 9a is a top view of the folding screen 20 of the foldable electronic device 100 of fig. 8. The folding screen 20 has a first signal line layer 201. The first signal line layer 201 may include all lines for signal transmission between the first circuit board 31 and the second circuit board 32, or may include part of the lines for signal transmission between the first circuit board 31 and the second circuit board 32. For example, when the first signal line layer 201 includes a part of the wiring for signal transmission between the first circuit board 31 and the second circuit board 32, a normal signal line (for example, a first signal line mentioned below) and a power signal line may be integrated on the first signal line layer 201. Special signal lines for controlling impedance can be integrated on the shaft-penetrating electric connector 54. Among them, the special signal line may be a high-speed, high-frequency signal line (for example, a third signal line mentioned below).

Referring to fig. 8 and 9a, the first signal line layer 201 includes a first electrical connection terminal 201a and a second electrical connection terminal 201b. The first electrical connection 201a is disposed at the first portion 21 of the folding screen 20 and the second electrical connection 201b is disposed at the second portion 22 of the folding screen 20. The first circuit board 31 is electrically connected to the first electrical connection terminal 201a, and the second circuit board 32 is electrically connected to the second electrical connection terminal 201b, so that the first circuit board 31 and the second circuit board 32 can be electrically connected through the first signal line layer 201.

Referring to fig. 8 and 9b, fig. 9b is a top view illustrating a portion of the structure of the foldable electronic device 100 shown in fig. 8. The first circuit board 31 and the first electrical connection terminal 201a are electrically connected by the first flexible electrical connector 51, and the second circuit board 32 and the second electrical connection terminal 201b are electrically connected by the second flexible electrical connector 52. The first and second flexible electrical connectors 51, 52 may be flexible circuit boards or signal harnesses.

In this way, the first circuit board 31 and the second circuit board 32 can realize signal and data transmission through the first signal line layer 201, and can further communicate signals between related electronic devices inside the first casing 11 and the second casing 12. Moreover, since the first electrical connection end 201a is disposed on the first portion 21 of the folding screen 20, the first circuit board 31 is disposed in the first housing 11, the second electrical connection end 201b is disposed on the second portion 22 of the folding screen 20, and the second circuit board 32 is disposed in the second housing 12, that is, the first electrical connection end 201a and the first circuit board 31 are located on the same side of the folding mechanism 13, the second electrical connection end 201b and the second circuit board 32 are located on the same side of the folding mechanism 13, and the electrical connection structure (e.g., the first flexible electrical connector 51) between the first electrical connection end 201a and the first circuit board 31, and the electrical connection structure (e.g., the second flexible electrical connector 52) between the second electrical connection end 201b and the second circuit board 32 do not need to pass through the folding mechanism 13.

Therefore, when the first signal line layer 201 includes all the lines for signal transmission between the first circuit board 31 and the second circuit board 32, the foldable electronic device 100 in the embodiment of the application can realize all the signal connection between the first circuit board 31 and the second circuit board 32 without arranging the through-shaft electrical connector 54, so that the assembly difficulty of the foldable electronic device 100 can be reduced, the folding performance of the folding mechanism 13 can be ensured, the thickness of the folding mechanism 13 and the thickness of the whole foldable electronic device 100 can be reduced, and the light and thin design of the foldable electronic device 100 can be realized. In addition, since the shaft penetrating electric connector 54 is not required to be provided, the foldable electronic device 100 in the embodiment of the application has no reliability problems such as tearing of the shaft penetrating electric connector 54, and can ensure the stability and reliability of signal transmission between the first circuit board 31 and the second circuit board 32.

In addition, when the first signal line layer 201 includes a part of the lines for signal transmission between the first circuit board 31 and the second circuit board 32 and another part of the lines still need to be connected by the through-shaft electrical connector 54, the thickness or the width of the through-shaft electrical connector 54 can be reduced, on one hand, the bending radius of the through-shaft electrical connector 54 can be reduced, and further, the gap between the first display surface 21a and the second display surface 22a when the folding screen 20 is in the folded state can be reduced, which is beneficial to reducing the thickness of the foldable electronic device 100 in the folded state; on the other hand, after the thickness of the shaft penetrating electric connector 54 is reduced, the bending performance of the shaft penetrating electric connector 54 can be improved, the layering phenomenon of the shaft penetrating electric connector 54 in the bending process is avoided, the reliability of the shaft penetrating electric connector 54 can be improved, and therefore the stability and the reliability of signal transmission between the first circuit board 31 and the second circuit board 32 can be ensured; in yet another aspect, the volume of the through shaft electrical connector 54 can be reduced, and thus the occupied space of the through shaft electrical connector 54 in the folding mechanism 13 can be reduced, which is also beneficial to reducing the thickness of the folding mechanism 13 and the thickness of the foldable electronic device 100, and is beneficial to realizing the light and thin design of the foldable electronic device 100.

The foldable electronic device 100 in the embodiment of the present application can ensure stability and reliability of signal transmission between the first circuit board 31 and the second circuit board 32 by integrating at least part of the circuits for realizing signal transmission between the first circuit board 31 and the second circuit board 32 on the folding screen 20, and is beneficial to realizing the light and thin design of the foldable electronic device 100.

The specific structure of the folding screen 20 in the foldable electronic device 100 according to the embodiment of the present application is described in detail below.

Referring to fig. 10, fig. 10 is a schematic diagram of a stacked structure of the folding screen 20 shown in fig. 9 a. The folding screen 20 includes a plurality of film layers arranged in a stack. The first signal line layer 201 is disposed in one of the plurality of film layers, or the first signal line layer 201 is disposed on a surface of one of the plurality of film layers.

Illustratively, in some embodiments, the plurality of film layers includes a substrate base 202 and a display layer 203. The first signal line layer 201 may be disposed within the substrate 202 or the display layer 203, or the first signal line layer 201 may be disposed on a surface of the substrate 202 or a surface of the display layer 203. It will be appreciated that fig. 10 schematically illustrates only one stacked configuration of the folding screen 20, which is not to be construed as limiting the application. For example, in other embodiments, the multiple film layers of the folding screen 20 may also include a touch layer, a polarizing layer, and the like.

The substrate 202 is an infrastructure for carrying other stacks of folding screen 20, and other structures of folding screen 20 may be provided on substrate 202. In some embodiments, the material of the substrate base 202 is a flexible material. In order to improve the capability of the substrate 202 for blocking water vapor and oxygen, so as to prevent water vapor and oxygen from entering the folding screen 20 and affecting the internal devices of the folding screen 20, the substrate 202 may be a composite structure formed by sequentially and alternately stacking the substrate layer and the blocking layer. Among them, the material of the substrate layer includes, but is not limited to, polyimide (PI), polyethylene terephthalate (polyethylene terephthalate, PET), etc., and the material of the barrier layer includes, but is not limited to, silicon nitride (SiNx), silicon oxide (SiOx), etc.

For example, referring to fig. 10, the substrate 202 includes a first substrate layer 2021, a first barrier layer 2022, and a second substrate layer 2023 stacked in this order. The structure is simple, and the supporting capability and the capability of isolating water and oxygen of the substrate 202 can be ensured.

With continued reference to fig. 10, the display layer 203 is stacked with the substrate 202. The display layer 203 includes a driving circuit layer 2031, a light emitting layer 2032, and an encapsulation layer 2033. Alternatively, the driving circuit layer 2031 is a thin film transistor layer. In some embodiments, in order to avoid the impurity ions affecting the characteristics of the driving circuit layer 2031 and further blocking water and oxygen, a buffer layer 204 (buffer) is further provided between the substrate base 202 and the driving circuit layer 2031. The buffer layer 204 may be a single-layer or multi-layer structure including an inorganic material such as silicon nitride (SiNx) and/or silicon oxide (SiOx).

Referring to fig. 10, the driving circuit layer 2031 includes a first Gate Insulator (GI) 2031a, a second gate insulator 2031b, an interlayer insulator (interlayer dielectric, ILD) 2031c, and a Planarization Layer (PLN) 2031d stacked in this order in a direction from the substrate 202 toward the display layer 203. Materials of the first gate insulating layer 2031a, the second gate insulating layer 2031b, and the interlayer insulating layer 2031c include, but are not limited to, silicon nitride (SiNx), and silicon oxide (SiOx). The material of the planarization layer 2031d may be an organic insulating material. For example, the organic insulating material includes polyimide, epoxy, acryl, and the like.

A thin film transistor 2031f and a second signal line layer 2031g are provided in the driving circuit layer 2031. The thin film transistor 2031f is electrically connected to the second signal line layer 2031g. Alternatively, the second signal line layer 2031g may be provided on the planarization layer 2031d. The second signal line layer 2031g may be electrically connected to the external terminal 2121. Specifically, the external terminal 2121 includes a second external terminal 2121b, and the second signal line layer 2031g may be electrically connected to the second external terminal 2121 b.

The light emitting layer 2032 includes a pixel defining layer (pixel definition layer PDL) 2032a and a light emitting device 2032b. The pixel defining layer 2032a is disposed on a side of the planarization layer 2031d facing away from the substrate 202. The pixel defining layer 2032a is provided with a pixel opening, and the light emitting device 2032b is disposed at the pixel opening. The light emitting device 2032b is electrically connected to the thin film transistor 2031f to drive the light emitting device 2032b to emit light through the thin film transistor 2031f, so that the folding screen 20 can display an image. Alternatively, the light emitting device 2032b is an OLED light emitting device.

With continued reference to fig. 10, the encapsulation layer 2033 is disposed on a side of the light emitting layer 2032 facing away from the substrate 202. The encapsulation layer 2033 is used for covering the light emitting device 2032b to block water and oxygen, and prevent components such as water and oxygen in the air from entering the light emitting device 2032b, so that the light emitting device 2032b can be protected, and corrosion of the light emitting device 2032b can be avoided. The material of the encapsulation layer 2033 may be an inorganic material or an organic material. The encapsulation layer 2033 may also be formed by stacking an organic material layer and an inorganic material layer.

In some embodiments, referring to fig. 10, in order to protect the display layer 203, the folding screen 20 further includes a light-transmitting cover plate 205, where the light-transmitting cover plate 205 is disposed on a side of the display layer 203 facing away from the substrate 202. The material of the transparent cover 205 includes, but is not limited to, ultra-thin glass, acryl, etc. On the basis of this, a protective layer 206 may also be provided on the side of the transparent cover plate 205 facing away from the substrate base plate 202 in order to improve the scratch resistance, fingerprint resistance, etc. of the folding screen 20.

Referring to fig. 10, the folding screen 20 further includes a support layer 207. The support layer 207 is disposed on a side surface of the substrate 202 facing away from the display layer 203. In order to ensure the bendable property of the support layer 207 so as to facilitate folding the folding screen 20 to a folded state, the support layer 207 is provided with a hollowed-out structure 2071. In this way, the first terminal portion 212 is easily bent with respect to the first display portion 211, and the third portion 23 of the folding screen 20 is easily bent.

In some embodiments, the material of the support layer 207 is metal. Optionally, the material of the support layer 207 is a titanium alloy. In this way, the supporting strength of the supporting layer 207 and the thickness of the supporting layer 207 can be considered, so that the overall strength of the folding screen 20 can be improved, and the overall thickness of the folding screen 20 can be reduced, thereby being beneficial to realizing the light and thin design of the folding screen 20. In other embodiments, the material of the support layer may also be carbon fiber. That is, the support layer is a carbon fiber layer. The carbon fiber has high structural strength and small mass, and can reduce the weight of the folding screen 20 while taking the thickness of the support layer 207 into consideration after the support strength of the support layer 207.

With continued reference to fig. 10, in this embodiment, a first signal line layer 201 is disposed within a substrate base 202. The first signal line layer 201 may extend from the first portion 21 to the second portion 22 via the third portion 23. The first signal line layer 201 is an interconnect line layer provided in the substrate base 202, and has electrical properties. In this way, by disposing the first signal line layer 201 in the substrate 202, it is convenient to implement electrical connection between the first circuit board 31 and the second circuit board 32, and the spacing distance between the first signal line layer 201 and the second signal line layer 2031g in the display layer 203 can be increased, which is beneficial to reducing signal interference of the first signal line layer 201 to the second signal line layer 2031g, and further is beneficial to improving the display effect of the folding screen 20.

Specifically, the first signal line layer 201 may include at least one of a first signal line for transmitting data, a second signal line having a through-flow effect, and a third signal line having an anti-resistance effect. The thickness, line width and line distance of the signal lines of different types are different from the requirements of the first signal line layer 201 on the thickness of the medium, and can be designed according to actual requirements in the actual preparation process. In addition, the routing form of the first signal line layer 201 may be a straight line, a broken line, a curve, a serpentine line, etc., and the specific routing form of the first signal line layer 201 is not limited in the present application.

Specifically, referring to fig. 9a and fig. 10, the first terminal portion 212 of the folding screen 20 is provided with a first external terminal 2121a, and the first electrical connection end 201a is electrically connected to the first external terminal 2121 a. In this way, the first external terminal 2121a can be electrically connected to the first circuit board 31, so as to electrically connect the first electrical connection terminal 201a to the first circuit board 31.

Referring to fig. 11, fig. 11 is a schematic electrical connection diagram of the folding screen 20 shown in fig. 10 and the first flexible electrical connector 51 and the second flexible electrical connector 52. The first external connection terminal 2121a and the first circuit board 31 are electrically connected via a first flexible electrical connection 51. The first flexible electrical connector 51 may be a flexible circuit board (flexible printed circuit, FPC) or a signal harness, among others.

Illustratively, the first external terminal 2121a and the first flexible electrical connector 51 are connected via anisotropic conductive film 24 (anisotropic conductive film, ACF) by soldering to electrically connect the first external terminal 2121a to the first flexible electrical connector 51. The first flexible electrical connector 51 and the first circuit board 31 may be electrically connected by a board-to-board (BTB) connector 25.

In some embodiments, in order to achieve the electrical connection between the first electrical connection end 201a and the first external connection terminal 2121a, please continue to refer to fig. 10 and 11, a first conductive structure 261 is disposed in the folding screen 20, one end of the first conductive structure 261 is electrically connected with the first electrical connection end 201a, and the other end of the first conductive structure 261 is electrically connected with the first external connection terminal 2121 a. The first conductive structure 261 may be a metallized via formed in the folded screen 20 or a metal member buried in the folded screen 20.

In some embodiments, the first electrical connection terminal 201a is disposed at the first terminal portion 212. In this way, the first conductive structure 261 can extend along the stacking direction of the substrate 202 and the display layer 203, so that the structure of the first conductive structure 261 can be simplified, and the processing difficulty of the first conductive structure 261 can be reduced.

Of course, it is understood that in other embodiments, the first electrical connection terminal 201a may also be disposed on the first display portion 211.

With continued reference to fig. 10-12, fig. 12 is an enlarged view of the area a in the cross-sectional view of fig. 8. The second portion 22 of the folding screen 20 includes a second display portion 221, a side surface of the second display portion 221 facing away from the second housing 12 forms a second display surface 22a, and the second electrical connection terminal 201b is disposed on the second display portion 221. The surface of the substrate 202 facing away from the display layer 203 is provided with a second opening 2021f, and the second electrical connection end 201b is exposed out of the second opening 2021f. In this way, it is convenient to achieve an electrical connection between the second electrical connection terminal 201b and the second circuit board 32.

With continued reference to fig. 11, the second electrical connection terminal 201b is electrically connected to the second circuit board 32 through the second flexible electrical connector 52. Illustratively, the second electrical connection end 201b and the second flexible electrical connector 52 may be welded together by the anisotropic conductive film 24. The electrical connection between the second flexible electrical connector 52 and the second circuit board 32 may be made through the board-to-board connector 25.

In some embodiments, referring to fig. 9 a-11, a second external terminal 2121b is further disposed on the first terminal portion 212, the second external terminal 2121b is electrically connected to the second signal line layer 2031g in the display layer 203, and the second external terminal 2121b is electrically connected to the first circuit board 31. In this way, the folding screen 20 can be controlled to display an image or video through the first circuit board 31.

On the basis of this, in order to simplify the structure of the foldable electronic device 100, the second external terminal 2121 and the first circuit board 31 are electrically connected by the first flexible electrical connector 51. Specifically, referring to fig. 11, the foldable electronic device 100 further includes a driving chip 61, the driving chip 61 is electrically connected to the second external terminal 2121b, and the driving chip 61 is electrically connected to the first flexible electrical connector 51.

Further, referring to fig. 10 and 11, a first ground layer 208 is disposed in the folding screen 20, and the first ground layer 208 is located between the first signal line layer 201 and the second signal line layer 2031 g. The first ground layer 208 may be provided in any one layer structure between the first signal line layer 201 and the second signal line layer 2031 g. In this way, by providing the first ground layer 208 between the first signal line layer 201 and the second signal line layer 2031g, the reflow and impedance control can be realized by the first ground layer 208, and on the other hand, the first signal line layer 201 and the second signal line layer 2031g can be separated by the first ground layer 208, so that the isolation effect can be achieved, the interference of the first signal line layer 201 to the second signal line layer 2031g is avoided, the stability and reliability of the second signal line layer 2031g can be improved, and the display effect of the folding screen 20 can be improved.

It will be appreciated that in other embodiments, the first ground layer 208 may not be disposed within the folding screen 20.

In some embodiments, referring to fig. 13a, fig. 13a is a schematic structural diagram of a substrate 202 in the folding screen 20 shown in fig. 10. The substrate 202 includes a first substrate layer 2021, a first barrier layer 2022, and a second substrate layer 2023 which are stacked in this order. Specifically, the first substrate layer 2021 includes a first surface 2021a and a second surface 2021b opposite to each other, the first surface 2021a faces the display layer 203, and the second surface 2021b faces away from the display layer 203.

The first signal line layer 201 may be disposed on the first substrate layer 2021 of the substrate base 202, and the first ground layer 208 may be disposed on the first barrier layer 2022. The first barrier layer 2022 is disposed on the first surface 2021a. The first blocking layer 2022 is disposed on the first surface 2021a and wraps the first signal line layer 201. The second substrate layer 2023 is disposed on a side of the first barrier layer 2022 facing away from the first substrate layer 2021.

On this basis, when the first conductive structure 261 is a metallized via hole, in order to reduce the processing difficulty of the first conductive structure 261, referring to fig. 13b, fig. 13b is a schematic partial structure of the folded screen 20 shown in fig. 10, where the first conductive structure 261 includes a first conductive segment 261a, a second conductive segment 261b and a third conductive segment 261c that are electrically connected in sequence. Illustratively, electrical connection is made between the first conductive segment 261a and the second conductive segment 261b, and between the second conductive segment 261b and the third conductive segment 261c, respectively, via pads.

The first conductive segment 261a includes a first hole segment and a conductive material filled in the first hole segment, the second conductive segment 261b includes a second hole segment and a conductive material filled in the second hole segment, and the third conductive segment 261c includes a third hole segment and a conductive material filled in the third hole segment. The first hole section, the second hole section and the third hole section may be processed by photolithography processes, respectively.

Specifically, one end of the first conductive segment 261a is connected with the first electrical connection end 201a of the first signal line layer 201, the other end of the first conductive segment 261a extends to a surface of the first barrier layer 2022 facing away from the first substrate layer 2021, one end of the second conductive segment-261 b is electrically connected with the first conductive segment 261a, and the other end of the second conductive segment-261 b extends to a surface of the second substrate layer 2023 facing away from the first substrate layer 2021. One end of the third conductive segment 261c is electrically connected with the second conductive segment-261 b, the other end of the third conductive segment 261c extends to a surface of the interlayer insulating layer 2031c facing away from the first substrate layer 2021, and the other end of the third conductive segment 261c is electrically connected with the first external terminal 2121 a.

In some embodiments, referring to fig. 14, fig. 14 is a schematic diagram of a first signal line layer 201 and a first substrate layer 2021 in the substrate base plate 202 shown in fig. 13 a. In the present embodiment, the first signal line layer 201 includes a first signal line 2011, one side surface of the first signal line 2011 is attached to the first surface 2021a, and the other side surface of the first signal line 2011 protrudes from the first surface 2021a. The first signal line layer 201 may be formed on the first surface 2021a of the first substrate layer 2021 by a processing method such as sputtering or electroplating.

In some embodiments, in order to reduce the processing difficulty of the first signal line layer 201 and improve the bonding strength between the first signal line layer 201 and the first substrate layer 2021, referring to fig. 14, the first signal line layer 201 includes a base layer 201c and a body layer 201d. The body layer 201d is located on the side of the base layer 201c facing away from the first substrate layer 2021. The underlayer 201c has a strong bonding capability with the first substrate layer 2021 and the bulk layer 201d. Illustratively, the material of the primer layer 201c includes, but is not limited to, titanium (Ti), and the material of the bulk layer 201d includes, but is not limited to, copper (Cu), aluminum (Al), and the like. Wherein, titanium, copper and aluminum all have excellent conductivity, which can ensure the signal transmission efficiency of the first signal line layer 201, and titanium and the first substrate layer 2021, copper and aluminum all have better binding capability. In this way, by providing the primer layer 201c between the first substrate layer 2021 and the body layer 201d, the first signal line layer 201 can be effectively prevented from falling off from the first substrate layer 2021, so that stability and reliability of signal transmission between the first circuit board 31 and the second circuit board 32 can be ensured.

The thickness of the primer layer 201c may be 0.3 μm to 0.8 μm. The thickness of the bulk layer 201d may be 2 μm to 5 μm. Illustratively, the primer layer 201c may have a thickness of 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm, etc. The thickness of the bulk layer 201d may be 2 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, etc. The thickness of the primer layer 201c refers to the dimension of the primer layer 201c in the lamination direction of the plurality of film layers, and the thickness of the body layer 201d refers to the dimension of the body layer 201d in the lamination direction of the plurality of film layers.

In other embodiments, referring to fig. 15, fig. 15 is a schematic diagram of a first signal line layer 201 and a first substrate layer 2021 according to other embodiments of the present application. In the present embodiment, the first signal line layer 201 includes a first signal line 2011 and a second signal line 2012. In order to ensure the current passing capability of the second signal line 2012, the thickness of the second signal line 2012 is greater than the thickness of the first signal line 2011.

On this basis, in order to reduce the difficulty in processing the first signal line layer 201, the first surface 2021a of the first substrate layer 2021 is provided with a first groove 2021c and a second groove 2021d recessed toward the second surface 2021 b. The first signal line 2011 is disposed in the first recess 2021c, and the second signal line 2012 is disposed in the second recess 2021d. Referring to fig. 15, the depth of the first groove 2021c is equal to the thickness of the first signal line 2011, and the depth of the second groove 2021d is equal to the thickness of the second signal line 2012. In this way, in the processing procedure, the first signal line 2011 and the second signal line 2012 can be formed in the first groove 2021c portion and the second groove 2021d portion respectively, so as to control the thickness of the first signal line 2011 and the second signal line 2012 conveniently, and reduce the processing difficulty of the first signal line layer 201.

In still other embodiments, the second grooves 2021d may be provided only on the first substrate layer 2021. Referring to fig. 16, fig. 16 is a schematic diagram of a first signal line layer 201 and a first substrate layer 2021 according to still another embodiment of the present application. In this embodiment, the first surface 2021a of the first substrate layer 2021 is provided with a second groove 2021d, a portion of the second signal line 2012 is located in the first groove 2021c, and the first signal line 2011 is disposed on the first surface 2021a of the substrate 202. The depth of the first groove 2021c may be equal to a thickness difference of the second signal line 2012 and the first signal line 2011. In this way, during the processing, a part of the second signal line 2012 may be formed in the first groove 2021c, and then another part of the second signal line 2012 and the first signal line 2011 may be formed on the first surface 2021a at the same time, so that the thicknesses of the first signal line 2011 and the second signal line 2012 are also convenient to control, and the processing difficulty of the first signal line layer 201 can be reduced.

With reference to fig. 17, fig. 17 is a schematic diagram illustrating a stacked structure of a folding screen 20 according to another embodiment of the present application. The folding screen 20 in the present embodiment is different from the folding screen 20 in the embodiment shown in fig. 10 in that a shielding metal layer 209 is provided in addition to the first signal line layer 201 and the first ground layer 208 in the folding screen 20 in the present embodiment. The shield metal layer 209 is disposed between the first ground layer 208 and the second signal line layer 2031 g.

For example, referring to fig. 17, a shield metal layer 209 is disposed within the substrate base 202. Specifically, the shielding metal layer 209 may be disposed within the first barrier layer 2022, and the shielding metal layer 209 and the first ground layer 208 may be disposed to be spaced apart in the lamination direction of the plurality of film layers. In this way, the first signal line layer 201 and the first ground layer 208 may be separated from the second signal line layer 2031g by the shielding metal layer 209, so that the first signal line layer 201 and the first ground layer 208 may be prevented from interfering with the second signal line layer 2031g, stability and reliability of the second signal line layer 2031g may be further improved, and further, the display effect of the folding screen 20 may be further improved.

It is understood that the shield metal layer 209 of the present embodiment may be combined with any of the embodiments of the present application.

The following describes a method of manufacturing the folding screen 20 in the embodiment shown in fig. 10.

Referring to fig. 18, fig. 18 is a flowchart illustrating a method for manufacturing a folding screen 20 according to some embodiments of the present application. The method for manufacturing the folding screen 20 includes:

step S101: providing a rigid carrier 281, forming a first substrate layer 2021 on the rigid carrier 281;

optionally, the rigid carrier 281 is a glass substrate. The first substrate layer 2021 may be formed on the rigid carrier plate 281 by spin coating, spray coating, or the like, and then formed by baking and curing. The thickness of the first substrate layer 2021 may be 8um to 10um. For example, the thickness of the first substrate layer 2021 may be 8 μm, 8.5 μm, 9 μm, 9.5 μm, 10 μm, or the like.

Step S102: forming a first signal line layer 201 on the first substrate layer 2021;

the first signal line layer 201 may be formed on the first substrate layer 2021 by sputtering, plating, or the like. The process is simple and the processing is convenient.

Specifically, forming the first signal line layer 201 on the first substrate layer 2021 includes:

step S102a: forming a base layer 201c on the first substrate layer 2021, the base layer 201c being made of titanium;

step S102b: a body layer 201d is formed on the primer layer 201c, and the material of the body layer 201d is copper or aluminum.

Wherein the thickness of the primer layer 201c is 0.5 μm. The thickness of the bulk layer 201d is 2 μm to 5 μm. The primer layer 201c may be formed on a surface of the first substrate layer 2021 facing away from the rigid carrier plate 281 by a sputtering process. The body layer 201d may be formed on a surface of the base layer 201c facing away from the rigid carrier plate 281 by a sputtering or electroplating process.

With continued reference to fig. 18, the method for preparing the folding screen 20 further includes:

step S103: forming a first barrier layer 2022 on a surface of one side of the first substrate layer 2021 facing away from the rigid carrier 281, where the first barrier layer 2022 wraps the first signal line layer 201;

the first barrier layer 2022 may be formed on a surface of the first substrate layer 2021 facing away from the rigid carrier 281 by a plasma enhanced chemical vapor deposition method (plasma enhanced chemical vapor deposition, PECVD). The thickness of the first barrier layer 2022 was 0.5 μm.

Step S104: forming a first aperture segment 282 in the first barrier layer 2022;

wherein the first hole segments 282 may be formed by a photolithographic process.

Step S105: forming a first ground layer 208 on a surface of the first barrier layer 2022 on a side facing away from the first substrate layer 2021, and filling a conductive material in the first hole section 282 to form a first conductive section 261a;

the thickness of the first ground layer 208 may be 0.5-3 um, the material of the first ground layer 208 may be the same as that of the first signal line layer 201, and the formation method of the first ground layer 208 is the same as that of the first signal line layer 201, which is not described herein. Of course, the material, structure, and forming method of the first ground layer 208 may be different from those of the first signal line layer 201.

Step S106: forming a second substrate layer 2023 on a side surface of the first barrier layer 2022 facing away from the first substrate layer 2021, and forming a second conductive segment 261b on the second substrate layer 2023;

the second substrate layer 2023 may be formed by the same method as the first substrate layer 2021.

Step S107: forming a buffer layer 204, a first gate insulating layer 2031a, a second gate insulating layer 2031b, an interlayer insulating layer 2031c, and a part of a thin film transistor 2031f of the driver circuit layer 2031 on a side of the second substrate layer 2023 facing away from the first substrate layer 2021;

Step S108: forming a third hole section 283, a source hole 284, a drain hole 285 in the folding screen 20;

step S109: filling a conductive material in the third hole section 283 to form a third conductive section 261c, filling a conductive material in the source hole 284 and the drain hole 285, forming a second signal line layer 2031g on the interlayer insulating layer 2031c, and electrically connecting the third conductive section 261c to the first external terminal 2121a;

step S110: forming other film layers of the folding screen 20 on the side of the driving circuit layer 2031 facing away from the substrate base plate 202; illustratively, the other film layers include a planarizing layer 2031d, a light emitting layer 2032, an encapsulation layer 2033, and a light-transmissive cover plate 205.

Step S111: removing the rigid carrier 281, and disposing a second opening 2021f on a surface of the first substrate layer 2021 facing away from the driving circuit layer 2031, so as to expose the second electrical connection end 201b of the first signal line layer 201;

the second opening 2021f may be formed by a laser drilling or photolithography process.

Step S112: forming a support layer 207 on a side of the first substrate layer 2021 facing away from the first barrier layer 2022, resulting in a folded screen 20;

the support layer 207 may be bonded to the first substrate layer 2021.

After the folding screen 20 is obtained, the first flexible electrical connector 51 may be electrically connected to the first external terminal 2121a, the driving chip 61 may be electrically connected to the second external terminal 2121b, and the second flexible electrical connector 52 may be electrically connected to the second electrical connection terminal 201b, so that the folding screen 20 may be electrically connected to the first circuit board 31 and the second circuit board 32.

In still other embodiments, referring to fig. 19, fig. 19 is a schematic view illustrating an assembly structure of the folding screen 20, the first flexible electrical connector 51, and the second flexible electrical connector 52 according to still other embodiments of the present application. The folding screen 20 in this embodiment is different from the embodiment shown in fig. 11 in that the manner in which the electrical connection between the first electrical connection terminal 201a of the first signal line layer 201 and the first circuit board 31 is achieved in this embodiment is different.

Specifically, a surface of the substrate 202 facing away from the display layer 203 in this embodiment is provided with a first opening 2021e, and the first electrical connection end 201a is exposed from the first opening 2021e. In this way, electrical connection between the first flexible electrical connector 51 and the first circuit board 31 can be achieved by solder-connecting the first electrical connector 201a to the first flexible electrical connector 51. Illustratively, the first electrical connection end 201a and the first flexible electrical connector 51 may be connected by anisotropic conductive film 24 (anisotropic conductive film, ACF) soldering.

The connection between the first flexible electrical connector 51 and the first circuit board 31 and the connection between the second electrical connector 201b and the second circuit board 32 are the same as those of the embodiment shown in fig. 11, and will not be described in detail herein.

It will be appreciated that, in other embodiments, the electrical connection between the second electrical connection terminal 201b and the second circuit board 32 may be different from the connection in the embodiment shown in fig. 11, in which case, the electrical connection between the second electrical connection terminal 201b and the second circuit board 32 may be connected by adopting the electrical connection in any other embodiment of the present application.

With continued reference to fig. 19, in this embodiment, the second signal line layer 2031g and the first circuit board 31 may be electrically connected by a third flexible electrical connection 53. That is, the first signal line layer 201 and the second signal line layer 2031g are electrically connected to the first circuit board 31 through two different flexible electrical connectors, respectively.

In this embodiment, in order to reduce the difficulty in electrical connection between the first electrical connection terminal 201a and the first flexible electrical connector 51, the first electrical connection terminal 201a is disposed on the first display portion 211. On this basis, when the first portion 21 includes the first terminal portion 212, in order to avoid interference of the first terminal portion 212 during the electrical connection between the first electrical connection end 201a and the first flexible electrical connector 51, the front projection of the first electrical connection end 201a on the first display surface 21a and the front projection of the first terminal portion 212 on the first display surface 21a do not overlap when the first terminal portion 212 is in the bent state.

In still other embodiments, referring to fig. 20, fig. 20 is a schematic view illustrating an assembly structure of the folding screen 20, the first flexible electrical connector 51 and the second flexible electrical connector 52 according to still other embodiments of the present application. The folding screen 20 in this embodiment is different from the embodiment shown in fig. 11 in that the first signal line layer 201 is located in the display layer 203 in this embodiment. Specifically, the first signal line layer 201 may be disposed on any one of the structures of the display layer 203.

Specifically, in this embodiment, the first signal line layer 201 is provided in the same layer as the second signal line layer 2031 g. In this way, during the processing, the first signal line layer 201 and the second signal line layer 2031g can be formed simultaneously, and the first electrical connection terminal 201a of the first signal line layer 201 is electrically connected to the first external connection terminal 2121 a.

On this basis, in order to facilitate the electrical connection between the second electrical connection terminal 201b and the second circuit board 32, please continue to refer to fig. 20, a second conductive structure 262 is disposed in the folding screen 20, one end of the second conductive structure 262 is electrically connected to the second electrical connection terminal 201b, and the other end of the second conductive structure 262 is electrically connected to the second circuit board 32.

The second conductive structure 262 may be, for example, a metallized via or a metal piece buried within the folded screen 20. In this way, the second conductive structure 262 may be electrically connected to the second circuit board 32.

In some embodiments, referring to fig. 20, the second conductive structure 262 includes a conductive structure body 2621 and an external pad 2622, and the external pad 2622 is disposed on the other end of the conductive structure body 2621. The second conductive structure 262 is electrically connected to the second circuit board 32 through an external pad 2622. Illustratively, the second conductive structure 262 may be soldered to the second flexible electrical connector 52 via the external bonding pad 2622 and solder-connect the second flexible electrical connector 52 to the second circuit board 32, such that the external bonding pad 2622 may electrically connect the second flexible electrical connector 52 to the second circuit board 32 and thus electrically connect the second conductive structure 262 to the second circuit board 32.

Specifically, a surface of the substrate 202 facing away from the display layer 203 is formed with a third opening 2021g, and the external pad 2622 is exposed to the third opening 2021g. Optionally, the third opening 2021g penetrates through the first substrate layer 2021, and the external pad 2622 is disposed on a surface of the first barrier layer 2022 facing the first substrate layer 2021. In this way, the electrical connection between the second conductive structure 262 and the second circuit board 32 is facilitated, and when the conductive structure body 2621 is a metallized via hole, the difficulty of opening the metallized opening can be reduced, which is beneficial to reducing the processing cost.

In addition, when the conductive structure body 2621 is a metallized via hole, the structure and the processing method of the conductive structure body 2621 can be designed with reference to the first conductive structure 261, which will not be described in detail herein.

In some embodiments, electrical connection between the second conductive structure 262 and the second circuit board 32 may be made through the second flexible electrical connection 52.

In some embodiments, the second electrical connection terminal 201b is disposed at the second display portion 221. In this way, it is convenient to achieve an electrical connection between the second electrical connection terminal 201b and the second circuit board 32.

In still other embodiments, referring to fig. 21, fig. 21 is a schematic view illustrating an assembly structure of the folding screen 20, the first flexible electrical connector 51, and the second flexible electrical connector 52 according to still other embodiments of the present application. In this embodiment, the second portion 22 of the folding screen 20 includes a second terminal portion 222 in addition to the second display portion 221. The second terminal portion 222 is provided with a third external terminal 2221, and the second electrical connection end 201b is electrically connected to the third external terminal 2221.

Referring to fig. 21, the second terminal portion 222 is connected to one side edge of the second display portion 221. The second display surface 22a is formed on the second display portion 221. The second terminal portion 222 is bendable with respect to the second display portion 221 in a direction away from the second display surface 22 a. When the second terminal portion 222 is in the bent state, a portion of the second terminal portion 222 is located on a side of the folding screen 20 facing away from the second display surface 22 a.

In this way, the second electrical connection end 201b can be electrically connected with the second circuit board 32 by means of the third external connection terminal 2221, and when the first signal line layer 201 and the second signal line layer 2031g are arranged in the same layer, the electrical connection between the second electrical connection end 201b and the third external connection terminal 2221 can be achieved by the wiring of the first signal line layer 201, so that the second opening 2021f is not required to be arranged on the substrate 202 of the folding screen 20, and the second conductive structure 262 is not required to be arranged, which is beneficial to reducing the processing difficulty of the folding screen 20.

The electrical connection manner between the first electrical connection terminal 201a and the first circuit board 31 in this embodiment may be implemented by the electrical connection manner in any embodiment of the present application, which is not limited in this application.

It will be appreciated that in other embodiments, when the first signal line layer 201 and the second signal line layer 2031g are disposed on different layers, the second electrical connection terminal 201b may also be electrically connected to the second circuit board 32 by the third external connection terminal 2121. In this case, the second conductive structure 262 may be disposed in the folding screen 20 to achieve the electrical connection between the second electrical connection terminal 201b and the third external connection terminal 2221 without providing an opening (e.g., the second opening 2021 f) on the substrate 202 of the folding screen 20. In this way, the difficulty of processing the folding screen 20 can also be reduced to some extent.

Referring to fig. 22, fig. 22 is a schematic diagram illustrating an assembly structure of the folding screen 20, the first flexible electrical connector 51, and the second flexible electrical connector 52 according to still other embodiments of the present application. In this embodiment, the first signal line layer 201 is spaced apart from the second signal line layer 2031g, and the second conductive structure 262 is disposed in the folding screen 20. The second conductive structure 262 is disposed on the second display portion 221, one end of the second conductive structure 262 is electrically connected to the second electrical connection end 201b, and the other end of the second conductive structure 262 is electrically connected to the third external connection terminal 2221. On the basis, the third external connection terminal 2221 and the second circuit board 32 may be electrically connected by the second flexible electrical connector 52.

Further, referring to fig. 22, the folding screen 20 further includes a first conductive structure 261, the first conductive structure 261 is disposed on the first display portion 211, one end of the first conductive structure 261 is electrically connected with the first electrical connection end 201a, and the other end of the first conductive structure 261 is electrically connected with the first external connection terminal 2121 a. The first external connection terminal 2121a and the first circuit board 31 may be electrically connected via a first flexible electrical connection 51.

It will be appreciated that the manner of electrical connection between the second electrical connection terminal 201b and the second circuit board 32 in the embodiments of the present application may be combined with the folding screen 20 in any of the above embodiments.

In the foldable electronic device 100 according to the embodiment of the present application, the first signal line layer 201 disposed in the folding screen 20 is used to realize the electrical connection between the first circuit board 31 and the second circuit board 32, so that the through-shaft electrical connector 54 can be omitted, or the size of the through-shaft electrical connector 54 can be reduced, so that the overall reduction benefit of the foldable electronic device is at least 0.1 mm. In addition, the folding performance and the folding reliability of the folding mechanism can be improved.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A foldable electronic device, comprising:

The shell assembly comprises a first shell, a second shell and a folding mechanism, wherein the folding mechanism is connected between the first shell and the second shell, and the first shell and the second shell can be folded and unfolded relatively;

the folding screen comprises a first part and a second part, the first part is supported on the first shell, the second part is supported on the second shell, the folding screen is provided with a first signal wire layer, the first signal wire layer comprises a first electric connection end and a second electric connection end, the first electric connection end is arranged on the first part, and the second electric connection end is arranged on the second part;

the first circuit board is arranged in the first shell and is electrically connected with the first electric connection end; and

the second circuit board is arranged in the second shell and is electrically connected with the second electric connection end so as to realize electric connection between the second circuit board and the first circuit board.

2. The foldable electronic device of claim 1, wherein the folding screen comprises a plurality of film layers arranged in a stacked manner, the first signal line layer being arranged within one of the plurality of film layers, or the first signal line layer being arranged on a surface of one of the plurality of film layers.

3. The foldable electronic device according to claim 1 or 2, wherein the first portion includes a first display portion and a first terminal portion, the first terminal portion is connected to a side edge of the first display portion, the first terminal portion includes a bent state, when the first terminal portion is in the bent state, the first terminal portion is located on a side of the first display portion, which is close to the housing assembly, a first external connection terminal is provided on the first terminal portion, the first electrical connection terminal is electrically connected to the first external connection terminal, and the first external connection terminal is electrically connected to the first circuit board.

4. A foldable electronic device according to claim 3, wherein the folding screen comprises a substrate and a display layer arranged in a stack, the first signal line layer being arranged within the substrate;

the folding screen is internally provided with a first conductive structure, one end of the first conductive structure is electrically connected with the first electrical connection end, and the other end of the first conductive structure is electrically connected with the first external terminal.

5. The foldable electronic device of claim 3 or 4, wherein the first electrical connection terminal is disposed at the first terminal portion.

6. A foldable electronic device according to claim 3, wherein the folding screen comprises a substrate base plate and a display layer which are arranged in a stacked manner, and the first signal line layer is arranged on the display layer.

7. The foldable electronic device of claim 6, wherein the display layer comprises a second signal line layer and a light emitting device, the light emitting device being electrically connected to the second signal line layer, the first signal line layer being co-layer with the second signal line layer.

8. The foldable electronic device of claim 6 or 7, further comprising a first flexible electrical connector through which a first external terminal is electrically connected to the first circuit board;

the display layer comprises a second signal line layer and a light emitting device, the light emitting device is electrically connected with the second signal line layer, and the second signal line layer is electrically connected with the first circuit board through the first flexible electric connector.

9. The foldable electronic device of any one of claims 6-8, wherein a second conductive structure is disposed within the folding screen, one end of the second conductive structure is electrically connected to the second electrical connection terminal, and the other end of the second conductive structure is electrically connected to the second circuit board.

10. The foldable electronic device of claim 1 or 2, wherein the first portion comprises a first display portion, a side surface of the first display portion facing away from the first housing forms a first display surface, and the first electrical connection terminal is located at the first display portion.

11. The foldable electronic device of claim 10, wherein the folding screen comprises a substrate board and a display layer which are stacked, the first signal line layer is disposed in the substrate board, a first opening is disposed on a surface of one side of the substrate board facing away from the display layer, and the first electrical connection terminal is exposed out of the first opening.

12. The foldable electronic device of claim 10 or 11, wherein the first portion comprises a first terminal portion connected to a side edge of the first display portion, the first terminal portion comprising a bent state in which a portion of the first terminal portion is located on a side of the first display portion facing away from the first display surface;

when the first terminal part is in the bending state, the orthographic projection of the first electric connection end on the first display surface is not overlapped with the orthographic projection of the first terminal part on the first display surface.

13. The foldable electronic device according to any one of claims 1-5, 10-12, wherein the folding screen comprises a plurality of film layers arranged in a stacked manner, a plurality of the film layers comprising a display layer including a second signal line layer and a light emitting device electrically connected to the second signal line layer;

the first signal line layer and the second signal line layer are arranged at intervals in the stacking direction of the plurality of film layers;

the folding screen is internally provided with a first grounding layer, the first grounding layer is positioned between the first signal line layer and the second signal line layer, and the first signal line layer is electrically connected with the first grounding layer.

14. The foldable electronic device of claim 13, wherein a shielding metal layer is further disposed in the folding screen, the shielding metal layer is located between the second signal line layer and the first ground layer, and the first ground layer and the second signal line layer are each spaced apart from the shielding metal layer in a stacking direction of the plurality of film layers.

15. The foldable electronic device of any of claims 1-5, 10-14, wherein the folding screen comprises a substrate and a display layer in a stacked arrangement, the substrate comprising:

A first substrate layer including a first surface facing the display layer, the first signal line layer being disposed on the first surface;

the first barrier layer is arranged on the first surface and wraps the first signal line layer;

the second substrate layer is arranged on one side of the first barrier layer, which is away from the first substrate layer.

16. The foldable electronic device of any one of claims 1-15, wherein the second portion includes a second display portion, a side surface of the second display portion facing away from the second housing forms a second display surface, and the second electrical connection terminal is disposed at the second display portion.

17. The foldable electronic device of any one of claims 1-15, wherein the second portion includes a second display portion and a second terminal portion, the second terminal portion is connected to a side edge of the second display portion, the second terminal portion includes a bent state, when the second terminal portion is in the bent state, the second terminal portion is located on a side of the second display portion near the second housing, a third external connection terminal is provided on the second terminal portion, and the second electrical connection terminal is electrically connected to the third external connection terminal.

18. The utility model provides a folding screen, is applied to collapsible electronic equipment, collapsible electronic equipment includes casing subassembly, first circuit board and second circuit board, the casing subassembly includes first casing, second casing and folding mechanism, first casing the second casing connect respectively in folding mechanism's opposite both sides, just first casing the second casing can fold relatively and expand, first circuit board is located in the first casing, the second circuit board is located in the second casing, its characterized in that, folding screen includes:

the folding screen comprises a first shell, a second shell and a first part and a second part, wherein the first part is supported by the first shell, the second part is supported by the second shell, the folding screen is provided with a first signal wire layer, the first signal wire layer comprises a first electric connection end and a second electric connection end, the first electric connection end is arranged on the first part, the second electric connection end is arranged on the second part, the first electric connection end is used for being electrically connected with the first circuit board, and the second electric connection end is used for being electrically connected with the second circuit board so as to realize electric connection between the second circuit board and the first circuit board.

19. The folding screen of claim 18, wherein the folding screen comprises a plurality of stacked layers, the first signal line layer is disposed within one of the plurality of layers, or the first signal line layer is disposed on a surface of one of the plurality of layers.