CN112639927A

CN112639927A - Flexible display device

Info

Publication number: CN112639927A
Application number: CN201880094173.0A
Authority: CN
Inventors: 刘景�; 陈松亚
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2021-04-09
Also published as: WO2020051902A1

Abstract

A flexible display device (100) includes a carrier assembly (20), a circuit board assembly (30), and a rear cover assembly (40). The carrier assembly (20) includes a first carrier (22) and a second carrier (26) spaced from the first carrier (22). The rear cover assembly (40) comprises a first sub rear cover (42) and a second sub rear cover (46), the first sub rear cover (42) covers the circuit board assembly (30) and is connected with the first bearing piece (22), the second sub rear cover (46) is connected with the second bearing piece (26), and the materials of the first sub rear cover (42) and the second sub rear cover (46) all comprise graphene plastics. The circuit board assembly (30) is arranged between the first bearing piece (22) and the first sub rear cover (42), and heat can be jointly dissipated through the bearing assembly (20) and the rear cover assembly (40), so that the heat dissipation area of the circuit board assembly (30) is increased, and uniform heat dissipation is facilitated.

Description

Flexible display device

Technical Field

The application relates to the field of electronic equipment, in particular to a flexible display device.

Background

Electronic device's among the correlation technique mainboard generally is through the back lid of electronic device and dispels the heat, and the proportion of the total area of lid behind the part back that nevertheless the mainboard corresponds is less, and consequently the mainboard is less through the heat conduction area of back lid, causes the temperature of the back lid that the mainboard corresponds higher, influences user experience.

Disclosure of Invention

In view of this, the present application provides a flexible display device with better heat dissipation performance.

The flexible display device of the embodiment of the application comprises a bearing assembly, a circuit board assembly and a rear cover assembly. The carrier assembly includes a first carrier and a second carrier spaced from the first carrier. The rear cover assembly comprises a first sub rear cover and a second sub rear cover, the first sub rear cover is connected with the circuit board assembly and the first bearing piece, the second sub rear cover is connected with the second bearing piece, and the first sub rear cover and the second sub rear cover are made of graphene plastic. The circuit board assembly is arranged between the first bearing piece and the first sub rear cover.

The bearing assembly and the rear cover assembly of the flexible display device are correspondingly connected, the circuit board assembly is located between the first bearing piece and the first sub rear cover, and heat can be dissipated together through the bearing assembly and the rear cover assembly, so that the heat dissipation area of the circuit board assembly is increased, and uniform heat dissipation is facilitated. The lid adopts the better graphite alkene plastic of radiating effect to make behind first sub-back cover and the second, has promoted the heat-sinking capability of back cover subassembly, makes the better heat radiation and natural convection heat dissipation of passing through of back cover subassembly in with the heat dissipation to the external air of flexible display device to realize that circuit board subassembly realizes the radiating purpose of soaking through holistic back cover subassembly, avoided the local high temperature of back cover subassembly.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

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

fig. 1 is a schematic view of a flexible display device according to an embodiment of the present application;

fig. 2 is a schematic perspective exploded view of a flexible display device according to an embodiment of the present application;

fig. 3 is a schematic perspective view of the flexible display device according to the embodiment of the present application when being laid flat;

fig. 4 is a schematic cross-sectional view of the flexible display device of fig. 3;

fig. 5 is a schematic perspective view of the flexible display device according to the embodiment of the present application when folded;

fig. 6 is a schematic cross-sectional view of the flexible display device of fig. 5;

FIG. 7 is a perspective view of a load bearing assembly according to an embodiment of the present application;

fig. 8 is a schematic perspective view of a circuit board assembly according to an embodiment of the present application;

fig. 9 is a perspective view of a rear cover assembly according to an embodiment of the present application.

Description of the main element symbols: the flexible heat sink 10, the first heat conducting member 12, the second heat conducting member 14, the carrier assembly 20, the first carrier 22, the third receiving space 222, the connecting member 24, the second carrier 26, the fourth receiving space 262, the circuit board assembly 30, the first chip 31, the first shielding cover 32, the first heat conductor 33, the motherboard 34, the second chip 35, the second shielding cover 36, the second heat conductor 37, the rear cover assembly 40, the first sub-rear cover 42, the first receiving space 422, the first inner surface 424, the cover 44, the second sub-rear cover 46, the second receiving space 462, the second inner surface 464, the battery 50, the flexible support assembly 60, the first support 62, the second support 64, the flexible display 70, and the flexible display device 100.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, a flexible display device 100 is provided. The flexible display device 100 of the present application includes, but is not limited to, smart terminals and display devices such as flexible smart phones, foldable smart computers, wearable smart products, and the like. The flexible display device 100 may be provided in a rectangular parallelepiped shape, for example, according to the specific situation.

Referring to fig. 2, the flexible display device 100 of the present embodiment includes a carrier assembly 20, a circuit board assembly 30 and a rear cover assembly 40. The carrier assembly 20 includes a first carrier 22 and a second carrier 26 spaced from the first carrier 22. The circuit board assembly 30 is disposed between the first carrier 22 and the first sub-rear cover 42. The rear cover assembly 40 includes a first sub rear cover 42 and a second sub rear cover 46, the first sub rear cover 42 is connected to the first carrier 22, the second sub rear cover 46 is connected to the second carrier 22, and the first sub rear cover 42 and the second sub rear cover 46 are made of graphene plastic.

The bearing assembly 20 and the rear cover assembly 40 of the flexible display device 100 of the embodiment of the present application are correspondingly connected, and the circuit board assembly 30 is located between the first bearing member 22 and the first sub-rear cover 42, so that heat can be commonly dissipated through the bearing assembly 20 and the rear cover assembly 40, thereby increasing the heat dissipation area of the circuit board assembly 30 and facilitating uniform heat dissipation.

Through the solvent exchange method, the graphene can be uniformly mixed with the plastic to form the graphene plastic material, and compared with the graphene and the plastic, the elastic modulus and the fracture toughness of the graphene plastic material are greatly improved, and the graphene plastic material has other various characteristics, such as higher thermal conductivity, better thermal stability, sulfuration resistance, moisture resistance, chemical stability and the like.

Lid 42 and the sub-better graphite alkene plastic of second after-mentioned cover 44 of first sub-back cover 42 adopt the radiating effect to make, can improve the performance of lid 42 and the sub-back cover 46 of second after-mentioned cover 42 after the first sub-, the heat-sinking capability of back cover subassembly 40 has been promoted, make back cover subassembly 40 better through heat radiation and natural convection heat dissipation with the heat in the air outside flexible display device 100, thereby realize that circuit board assembly 30 realizes soaking radiating purpose through holistic back cover subassembly 40, the local high temperature of back cover subassembly 40 has been avoided, service life is prolonged, and further beautify flexible display device 100's outward appearance and reinforcing user's experience and feel.

In one embodiment, the first sub back cover 42 may be made of a 3D glass material or a plastic material, and the second sub back cover 46 may be made of a 3D glass material or a plastic material.

Specifically, taking a 3D glass material as an example, the 3D glass material has a good thermal conductivity, and has the advantages of being light, thin, transparent, clean, fingerprint-resistant, anti-glare, hard, scratch-resistant, and good in weather resistance, and the plastic can be used for making 3D appearances of various shapes, so that the formed product is more beautiful and outstanding and has differentiation, and the first sub rear cover 42 and the second sub rear cover 46 have good strength and beauty.

It is understood that the first sub-rear cover 42 and the second sub-rear cover 46 are not limited to the 3D glass material, the plastic material and the graphene plastic material, and may be selected in specific implementations. Preferably, in the embodiment of the present application, the first sub back cover 42 and the second sub back cover 46 are made of graphene plastic with good heat dissipation performance.

In one embodiment, the first bearing 22 and the second bearing 26 may both be made of a metallic material. As such, the first carrier 22 and the second carrier 26 have higher strength to support the flexible display device 100 and have better heat conduction effect to facilitate heat dissipation.

Referring to fig. 2, in some embodiments, the flexible display device 100 includes a battery 50, and the battery 50 is disposed between the second carrier 26 and the second sub-rear cover 46. Thus, the battery 50 can dissipate heat through the second carrier 26 and the second sub-rear cover 46.

Referring to fig. 2, fig. 4 and fig. 9, the first supporting element 22 and the first sub-rear cover 42 are connected to form a first accommodating space 422, and the second supporting element 26 and the second sub-rear cover 46 are connected to form a second accommodating space 462.

The combination of the first receiving space 422 and the second receiving space 462 can support other components of the flexible display device 100, the circuit board assembly 30 and the battery 50 are respectively received in the first receiving space 422 and the second receiving space 462, and the supporting assembly 20 is supported on the sidewall of the periphery of the rear cover assembly 40, so that a stable connection can be formed, the space utilization rate of the rear cover assembly 40 is improved, and the integration of the flexible display device 100 is improved.

In some embodiments, the first carrier 22 and the second carrier 26 are close to each other when the flexible display device 100 is bent and far away from each other when the flexible display device 100 is unfolded.

Specifically, when the flexible display device 100 is bent, the rear cover assembly 40 is located at the outer side of the flexible display device 100 relative to the carrier assembly 20, so that even if the flexible display device 100 is bent and the circuit board assembly 30 and the battery 50 are close to each other, the first carrier 22 and the second carrier 26 in combination with the rear cover assembly 30 located at the outer side can dissipate heat generated by the circuit board assembly 30 and the battery 50;

when the electronic device 100 is unfolded, the first carrier 22 and the second carrier 26 are away from each other, and heat generated by the circuit board assembly 30 and heat generated by the battery 50 can be dissipated from the rear cover assembly 30 side and the carrier assembly 20 side, which is beneficial for dissipating heat and preventing the flexible display device 100 from overheating.

In some embodiments, when the flexible display device 100 is bent, the first sub back cover 42 and the second sub back cover 46 are close to each other, and a distance between the first sub back cover 42 and the second sub back cover 46 is greater than a distance between the first carrier 22 and the second carrier 26.

It can be understood that when the flexible display device 100 is bent, the rear cover assembly 40 is located at the outer side of the flexible display device 100 relative to the carrier assembly 20, so that the heat dissipation is more facilitated when the flexible display device 100 is bent.

In some embodiments, the flexible display device 100 includes the flexible heat dissipation member 10, the flexible heat dissipation member 10 thermally connects the circuit board assembly 30, the first sub back cover 42 and the second sub back cover 46, and the flexible heat dissipation member 10 extends from the first sub back cover 42 to the second sub back cover 46 across the connector 24 and fits on the second sub back cover 46.

Specifically, the flexible heat sink 10 is located between the battery 50 and the second sub-rear cover 46, and the battery 50 is connected to the second sub-rear cover 46 through the flexible heat sink 10. The flexible heat dissipation member 10 is connected to the first sub rear cover 42 and the second sub rear cover 46, and the flexible heat dissipation member 10 can firstly conduct heat generated by the circuit board assembly 30 to the flexible heat dissipation member 10, and then conduct the heat to the first sub rear cover 42 and the second sub rear cover 44 through the flexible heat dissipation member 10, so that the heat dissipation area is increased, and uniform heat dissipation is facilitated.

In some embodiments, the flexible display device 100 is capable of being switched between an unfolded state and a folded state, the flexible display device 100 having a bend angle of 0 ° to 180 °.

As shown in fig. 3 and 4, when the bending angle of the flexible display device 100 is 0 °, the flexible display device 100 is in a flattened state. As shown in fig. 5 and fig. 6, when the flexible display device 100 is bent by an angle of approximately 180 °, the first carrier 22 and the second carrier 26 are substantially overlapped, and the distance between the circuit board assembly 30 and the battery 50 is small, heat dissipation between the circuit board assembly 30 and the battery 50 may affect each other, which results in an increase in difficulty in heat dissipation of the flexible display device 100.

Thus, the provision of the flexible heat sink 10 dissipates heat more quickly from the back cover assembly 40 away from the first and

second carriers

22, 26, ensuring proper temperature and use of the flexible display device 100.

In some embodiments, the flexible heat sink 10 includes a first heat-conducting member 12 and a second heat-conducting member 14 arranged in a stack. The second thermal conductive member 14 is disposed on the rear cover assembly 40. The first thermal conductive member 12 is disposed on a side of the second thermal conductive member 14 away from the rear cover assembly 40. Specifically, the first heat conduction member 12 is attached to the connection member 24 and the circuit board assembly 30, and the second heat conduction member 14 is attached to the first sub rear cover 42 and the second sub rear cover 46.

Specifically, the strength of the first heat-conductive member 12 is greater than that of the second heat-conductive member 14. The second heat conduction member 14 is stacked on the first heat conduction member 12, so that the flexible heat dissipation member of the second heat conduction member 14 can be well protected from damage. When the flexible display device 100 is bent, the flexible heat sink 10 and the rear cover assembly 40 are located outside the flexible display device 100, so that heat dissipation is facilitated. The first heat conducting element 12 is attached to the connecting element 24 and the circuit board assembly 30, and the second heat conducting element 14 is attached to the first sub rear cover 42 and the second sub rear cover 46, so that the contact area between the flexible heat dissipation member 10 and each component can be increased, which is not only beneficial to the conduction and heat dissipation of the circuit board assembly 30 through the flexible heat dissipation member 10, but also beneficial to the improvement of the tightness and the connection stability of the internal structure of the flexible display device 100.

In some embodiments, the orthographic area of the first thermal conduction member 12 on the second thermal conduction member 14 overlies the second thermal conduction member 14.

Specifically, the size of the first thermal conduction member 12 may be the same as the size of the second thermal conduction member 14, or the size of the first thermal conduction member 12 may be slightly larger than the size of the second thermal conduction member 14, so that the first thermal conduction member 12 can sufficiently separate the second thermal conduction member 14 and the battery 50, the connection member 24, and the circuit board assembly 30 to reduce the wear of the second thermal conduction member 14.

In some embodiments, the first heat-conducting member 12 is made of metal, and the second heat-conducting member 14 is made of graphene material or graphite material.

Thus, the first heat-conducting member 12 and the second heat-conducting member 14 have better heat-conducting effect. In one example, the first heat conduction member 12 may be made of a metal steel sheet, so that the first heat conduction member 12 may enhance the strength of the flexible heat dissipation member 10, and further enhance the strength of the flexible display device 100.

Specifically, graphene materials such as graphene thin films and graphite materials such as graphite sheets. The graphene material and the graphite material have the advantages of stable structure, high strength, high toughness, flexibility, excellent electrical conductivity and thermal conductivity and the like, and have good thermal shock resistance, namely the graphite can withstand severe temperature change at normal temperature without being damaged, and when the temperature changes suddenly, the volume change of the graphite is not large, cracks are not generated, and a good second heat conducting piece 14 can be formed.

It is understood that the first heat conduction member 12 is not limited to the metal material, and the second heat conduction member 14 is not limited to the graphene material and the graphite material, and a suitable material is specifically selected in the specific implementation, but preferably, in the implementation of the present application, the thermal conductivity of the second heat conduction member 14 is greater than that of the first heat conduction member 12.

In certain embodiments, the carrier assembly 20 includes a connector 24, the connector 24 connecting the first carrier 22 with the second carrier 26, the connector 24 being thermally conductively connected with the flexible heat sink 10.

The first sub rear cover 42 correspondingly covers the first bearing member 22, the second sub rear cover 46 correspondingly covers the second bearing member 26, the connecting member 24 divides the flexible display device 100 into a first portion and a second portion, the first portion includes the first bearing member 22 and the first sub rear cover 42, the second portion includes the second bearing member 26 and the second sub rear cover 46, the connecting member 24 connects the first portion and the second portion, and the first portion and the second portion can be bent and flattened through the connecting member 24.

In one embodiment, the connecting member 24 can be a hinge, and the first supporting member 22 and the second supporting member 26 can be connected to the connecting member 24 by welding or screwing. In the present embodiment, the connecting member 24 is made of a metal material, so that the connecting member 24 has high strength and better heat conduction effect. In other embodiments, the connecting member 24 may be a structure with a certain bending capability, such as a structure made of plastic, polymer material, and metal material.

Specifically, the connector 24 is fixedly connected to the flexible heat sink 10, and the battery 50 is located on the other side of the connector 24 facing away from the circuit board assembly 30. The heat generated by the circuit board assembly 30 is conducted to the connecting member 24 and the second sub rear cover 46 corresponding to the battery 50 through the flexible heat dissipation member 10, so as to evenly dissipate the heat and prevent the temperature of the first sub rear cover 42 corresponding to the circuit board assembly 30 from being high.

The first heat-conducting member 12 is fixed to the battery 50, the connecting member 24, and the circuit board assembly 30, and the second heat-conducting member 14 is fixed to the rear cover assembly 40.

The first heat conducting member 12 is fixedly arranged with the battery 50, the connecting member 24 and the circuit board assembly 30, which can be understood that the battery 50, the connecting member 24 and the circuit board assembly 30 are connected with each other through the first heat conducting member 12, on one hand, the heat of the circuit board assembly 30 can be averaged on the battery 50 and the connecting member 24, and then the heat is conducted to the second heat conducting member 14 to be radiated out through the rear cover assembly 40; on the other hand, the first thermal conduction member 12 may carry the battery 50, the connection member 24 and the circuit board assembly 30 to improve the stability of the flexible display device 100.

In some embodiments, the back cover assembly 40 includes a cover 44 connected between the first sub-back cover 42 and the second sub-back cover 46, and the cover 44 covers a portion of the flexible heat sink 10 corresponding to the connector 24.

Specifically, the flexible display device 100 can be switched between bending and flattening, and the bending and flattening of the flexible display device 100 is realized by the deformation of the connecting member 24. When the flexible display device 100 is bent, the exposed connecting member 24 may hurt the user's hand, and the exposed connecting member 24 is also easily damaged by the external environment, such as moisture, impurities, etc. The effect is even more pronounced, particularly if the connecting member 24 is a metal hinge.

Therefore, the first sub rear cover 42 and the second sub rear cover 46 are connected by providing the cover 44 to cover the connection member 24, thereby protecting the connection member 24. The first sub-rear cover 42 and the second sub-rear cover 46 are connected by the cover 44 and form a continuous plane on which the flexible heat sink 10 can be attached. The cover 44 connects the first sub rear cover 42 and the second sub rear cover 46, and heat conducted to the first sub rear cover 42 may be conducted to the second sub rear cover 46 through the cover 44, and heat conducted to the second sub rear cover 46 may be conducted to the first sub rear cover 42 through the cover 44. Since the cover 44 covers the portion of the flexible heat sink 10 corresponding to the connector 24, the heat conducted to the flexible heat sink 10 can also be radiated directly through the cover 44.

In one embodiment, the cover 44 is made of a silicone material, a graphene silicone material, a polymer material, or a metal material.

Specifically, for example, a polymer such as a Polyimide (PI) material has excellent heat resistance, excellent mechanical properties, good chemical stability, humidity resistance, good radiation resistance, and good dielectric properties, and besides, the Polyimide also has characteristics of low temperature resistance, low expansion coefficient, flame retardancy, good biocompatibility, and the like, and can better isolate moisture and the like from entering the flexible display device 100, and better dissipate heat, thereby improving the strength of the back cover assembly 40 and further improving the strength of the flexible display device 100.

It is to be understood that the cover 44 is not limited to the silicone material, graphene silicone material, polymer material, or metal material mentioned above, and may be selected specifically in particular embodiments. Preferably, the covering member 44 may be made of graphene silica gel material with excellent heat dissipation performance.

Referring to fig. 2, 4 and 9, in some embodiments, the first sub-rear cover 42 includes a first inner surface 424 that is attached to the flexible heat dissipation member 10. The second sub-rear cover 46 includes a second inner surface 464 that conforms to the flexible heat sink 10.

It will be appreciated that the second plate 14 is attached to the first and second

inner surfaces

424, 464. The larger the contact area of the flexible heat sink 10 with the first and second

inner surfaces

424, 464, the larger the area of the flexible heat sink 10 that can conduct heat through the first and second sub rear covers 42, 46.

In this embodiment, the area of the attachment of the flexible heat sink 10 to the first inner surface 424 is greater than two-thirds of the total area of the first inner surface 424. The area of attachment of the flexible heat sink 10 to the second inner surface 464 is greater than two-thirds of the total area of the second inner surface 464.

The ratio of the attachment area of the flexible heat sink 10 to the first inner surface 424 and the second inner surface 464 is moderate, so that the flexible heat sink 10 can be well attached to the first sub rear cover 42 and the second sub rear cover 46 for heat dissipation, and the material consumption of the flexible heat sink 10 is also saved.

In one embodiment, the flexible heat dissipation element 10 may cover the first inner surface 424 and the second inner surface 464 entirely, so as to increase the contact area between the flexible heat dissipation element 10 and the first sub back cover 42 and the second sub back cover 46, facilitate heat conduction, and further improve the heat dissipation effect of the flexible heat dissipation element 10.

Of course, the attachment ratio of the flexible heat dissipation member 10 to the first and second

inner surfaces

424, 464 is not limited to the above-mentioned ratio, and may be selected in a specific embodiment.

Referring to fig. 4, 6 and 8, in some embodiments, the circuit board assembly 30 includes a first chip 31, a first shielding cover 32, a first heat conductor 33 and a main board (main board) 34. The first chip 31 is disposed on the main board 34. The first shielding can 32 covers the first chip 31, or the first chip 31 is accommodated in the first shielding can 32. The side of the first shield 32 remote from the main board 34 is attached to the flexible heat sink 10. The first heat conductor 33 is accommodated in the first shielding cover 32 and connects the first shielding cover 32 and the first chip 31.

Specifically, the first chip 31 and the first heat conductor 33 are stacked and accommodated in the first shielding cover 32. The provision of the first shield can 32 can increase the heat dissipation area of the main board 34 and serve to protect the first chip 31. The heat dissipation between the first chip 31 and the rest of the components in the flexible display device 100 will not affect each other, and thus the heat dissipation efficiency can be improved. The provision of the first heat conductor 33 can improve the efficiency of heat conduction between the first chip 31 and the first shield can 32.

More specifically, the first chip 31 may be, for example, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a Digital Signal Processor (DSP), a Modem (Modem), a navigation positioning chip, multimedia, or other chips or processing modules. The main Board 34 may be a Printed Circuit Board (PCB) and electrically connected to the battery 50 through a conductive wire, and the first chip 31 is electrically disposed on the main Board 34.

In some embodiments, the circuit board assembly 30 further includes a second chip 35, a second shield 36, and a second thermal conductor 37. The second chip 35 and the first chip 31 are respectively disposed on two opposite sides of the main board 34. The second shielding case 36 covers the second chip 35, or the second chip 35 is accommodated in the second shielding case 36. The side of the second shielding shell 36 facing away from the main board 34 is attached to the first carrier 22. The second heat conductor 37 is accommodated in the second shield case 36 and connects the second shield case 36 and the second chip 35.

Specifically, the second chip 35 and the second heat conductor 37 are stacked and contained in the second shielding cover 36, and the heat generated by the second chip 35 can be conducted to the first carrier 22 through the second shielding cover 36 and dissipated. The second shield 32 may be used to protect the second chip 35.

The provision of the second heat conductor 37 can improve the efficiency of heat conduction between the second chip 35 and the second shield can 36. More specifically, the second chip 35 may be, for example, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a Digital Signal Processor (DSP), a Modem (Modem), a navigation positioning module, a multimedia module, or the like, and the second chip 35 is electrically disposed on the main board 34. More specifically, the second chip 35 has a function different from that of the first chip 36.

In some embodiments, the thermal conductors include a first thermal conductor 33 and a second thermal conductor 37, and the materials used for the first thermal conductor 33 and the second thermal conductor 37 include thermally conductive silicone.

Specifically, the heat-conducting silica gel is a heat-conducting compound, has high heat conductivity and heat conductivity, cold and heat exchange resistance, aging resistance and electrical insulation, and has excellent moisture resistance, shock resistance, corona resistance, electric leakage resistance, wide use temperature, chemical medium resistance, low consistency and good use stability. And good workability, good adhesion to most of metal and non-metal materials, good adhesion and protection effects on the first chip 31 and the second chip 35, improved safety of the circuit board assembly 30, and further ensured use safety and service life of the flexible display device 100.

Referring to fig. 2, 4 and 6, in some embodiments, the flexible display device 100 includes a flexible support member 60 and a flexible display screen 70 disposed on the flexible support member 60. The flexible support member 60 is disposed on the carriage assembly 20. The flexible support assembly 60 includes a first support 62 and a second support 64 stacked on the first support 62. The first supporting member 62 is fixedly disposed on the carrying assembly 20. The flexible display screen 70 is fixedly disposed on the second support member 64.

Specifically, the flexible supporting component 60 is disposed on the bearing component 20, on one hand, the flexible supporting component 60 can be used for bearing the flexible display screen 70 to separate the flexible display screen 70 from the bearing component 20, so as to prevent the flexible display screen 70 from being directly pulled by the deformation of the bearing component 20, so as to protect the flexible display screen 70 from being damaged.

Referring to fig. 2 and fig. 7, the first carrier 22 and the second carrier 26 are disposed at the upper edge of the connecting member 26, the first carrier 22, the connecting member 24 and the second carrier 26 form a continuous plane, a third accommodating space 222 and a fourth accommodating space 262 are respectively formed in the first carrier 22 and the second carrier 24, and the flexible supporting assembly 60 and the flexible display screen 70 are accommodated in the third accommodating space 222 and the fourth accommodating space 262.

Therefore, the flexible supporting assembly 60 and the flexible display screen 70 are stably disposed on the supporting assembly 20, and a neat and beautiful flexible display device 100 can be formed.

In some embodiments, the first support 62 is made of a metal material and the second support 64 is made of a liquid metal material.

Therefore, the first supporting member 62 and the second supporting member 64 have higher strength and better heat conductivity, so as to form the flexible supporting assembly 60 having higher strength and better heat conductivity, thereby improving the heat dissipation capability of the circuit board assembly 30 to the flexible display screen 70 through the flexible supporting assembly 60.

In summary, the carrier assembly 20 and the rear cover assembly 40 respectively form two heat dissipation paths, that is, the carrier assembly 20 and the rear cover assembly 40 can dissipate heat of the circuit board assembly 30 and the battery 50 in two different directions.

When the flexible display device 100 is in the unfolded state, the first carrier 22, the second carrier 26, the first sub back cover 42 and the second sub back cover 46 all function as a main heat dissipation path to dissipate heat. Since the heat of the circuit board assembly 30 is higher than the heat of the battery 50, the heat of the circuit board assembly 30 can be conducted to the first carrier 22 through the second heat conductor 37 and the second heat insulating cover 36 in sequence, and the heat conducted to the first carrier 22 can be conducted to the second carrier 26 through the flexible supporting assembly 60, so as to achieve uniform temperature heat dissipation.

Meanwhile, the heat of the circuit board assembly 30 may also be sequentially conducted to the flexible heat sink 10 through the first heat conductor 33 and the first heat shield 32, and the heat conducted to the flexible heat sink 10 may be dissipated through the first rear cover 42 or conducted to the second rear cover 46 for uniform temperature heat dissipation.

However, when the flexible display device 100 is in the folded state, the first supporting member 22 and the second supporting member 26 are close to each other or even in contact with each other, and the space for dissipating heat outwards is small, and the heat dissipation efficiency is low. Therefore, in the folded state, heat is mainly dissipated through an additional heat dissipation path, i.e., through the rear cover assembly 40, which is still located at the outside. A part of the heat of the circuit board assembly 30 is conducted to the first sub rear cover 42 through the flexible heat sink 10 to be dissipated, another part is conducted to the second sub rear cover 46 through the flexible heat conducting member 10, and the heat of the battery 50 and the heat of the circuit board assembly 30 transferred by the flexible heat conducting member 10 are dissipated through the second sub rear cover 46. The cover 44 connects the first sub rear cover 42 and the second sub rear cover 46, and heat conducted to the first sub rear cover 42 may be conducted to the second sub rear cover 46 through the cover 44, and heat conducted to the second sub rear cover 46 may be conducted to the first sub rear cover 42 through the cover 44. Since the covering member 44 covers the portion of the flexible heat-conducting member 10 corresponding to the connecting member 24, the heat conducted to the flexible heat-conducting member 10 can also be dissipated directly through the covering member 44. The heat of the flexible display device 100 can be dissipated by the rear cover assembly 40 as a whole to achieve uniform heat dissipation and large-area heat dissipation, thereby ensuring the overall heat dissipation efficiency.

It is understood that the flexible heat dissipation member 10 may also include only the second heat conduction member 14, i.e., both heat conduction and support are performed by the second heat conduction member 14, and the first heat conduction member 12 may be omitted.

Further, when the connector 24 is made of a metal material, it can also serve as a heat dissipation path for dissipating heat from the battery 50 and the circuit board assembly 30. Namely, the first carrier 22, the second carrier 26, the flexible heat sink 10, the first sub rear cover 42 and the second sub rear cover 46 can further transfer the heat to the connector 24, and then radiate the heat to the outside through the connector 24, so as to further enhance the heat radiation effect.

In the embodiment of the present application, the flexible display screen 70 of the flexible display device 100 is in an inverted form, that is, after the flexible display device 100 is folded, the flexible display screen 70 is located at the inner side of the fold, and the rear cover assembly 40 is located at the outer side of the fold. Of course, it is to be understood that the flexible display device 100 of the present application is not limited to the inverted form, and the inverted flexible display device 100 may be equally applicable.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

A flexible display device, comprising:

a carrier assembly including a first carrier and a second carrier spaced from the first carrier;

the rear cover assembly comprises a first sub rear cover and a second sub rear cover, the first sub rear cover is connected with the first bearing piece, the second sub rear cover is connected with the second bearing piece, and the first sub rear cover and the second sub rear cover are made of graphene plastics; and

a circuit board assembly disposed between the first carrier and the first sub rear cover.
The flexible display device of claim 1, wherein the flexible display device comprises a battery disposed between the second carrier and the second sub back cover.
The flexible display device according to claim 2, wherein the first carrier and the first sub-rear cover are connected to form a first receiving space, and the circuit board assembly is received in the first receiving space;

the second bearing piece and the second sub rear cover are connected to form a second containing space, and the battery is contained in the second containing space.
The flexible display device of claim 1, wherein the first carrier and the second carrier are adjacent to each other when the flexible display device is bent;

when the flexible display device is flattened, the first bearing piece and the second bearing piece are far away from each other.
The flexible display device of claim 4, wherein a distance between the first sub back cover and the second sub back cover is greater than a distance between the first carrier and the second carrier when the flexible display device is bent.
The flexible display device of claim 1, wherein the flexible display device comprises a flexible heat dissipation member thermally connecting the circuit board assembly, the first sub back cover, and the second sub back cover.
The flexible display device of claim 6, wherein the flexible heat dissipation member comprises a first heat conduction member and a second heat conduction member arranged in a stack, the second heat conduction member being disposed on the back cover assembly, the first heat conduction member being disposed on a side of the second heat conduction member remote from the back cover assembly.
The flexible display device of claim 6, wherein the first thermal conduction member is attached to the circuit board assembly, and the second thermal conduction member is attached to the first sub back cover and the second sub back cover.
The flexible display device of claim 6, wherein the first thermal conductive member has a thermal conductivity lower than a thermal conductivity of the second thermal conductive member, and wherein a hardness of the first thermal conductive member is greater than a hardness of the second thermal conductive member.
The flexible display device of claim 6, wherein the first thermal conductive member is made of a metal material, and the second thermal conductive member is made of a graphene material or a graphite material.
The flexible display device of claim 6, wherein the carrier assembly comprises a connector connecting the first carrier and the second carrier, the connector being thermally conductive connected to the flexible heat sink.
The flexible display device according to claim 11, wherein the back cover assembly further comprises a cover member connecting the first sub back cover and the second sub back cover, the cover member covering a portion of the flexible heat dissipation member corresponding to the connector.
The flexible display device of claim 6, wherein the first sub-rear cover comprises a first inner surface to which the flexible heat dissipation member is attached, the flexible heat dissipation member being attached to the first inner surface over an area greater than two-thirds of a total area of the first inner surface;

the second sub rear cover comprises a second inner surface attached with the flexible heat dissipation member, and the area attached with the second inner surface of the flexible heat dissipation member is larger than two thirds of the total area of the second inner surface.
The flexible display device of claim 1, wherein the circuit board assembly comprises:

a main board;

the first chip is arranged on the mainboard; and

the cover is established the first shield cover of first chip, first shield cover is kept away from one side of mainboard with flexible heat dissipation spare heat conduction ground is connected.
The flexible display device of claim 14, wherein the circuit board assembly comprises a thermal conductor received within the first shield can and thermally coupling the first shield can and the first chip.
The flexible display device of claim 14, wherein the circuit board assembly further comprises:

the second chip and the first chip are respectively arranged on two sides of the mainboard, which are opposite to each other; and

the second shielding case covers the second chip, and one side of the second shielding case, which is far away from the mainboard, is connected with the first bearing piece in a heat conduction mode.
The flexible display device of claim 16, wherein the circuit board assembly further comprises a thermal conductor received within the second shield can and thermally coupling the second shield can and the second chip.
A flexible display device according to claim 15 or 17, wherein said thermal conductor comprises a thermally conductive silicone.
The flexible display device of claim 1, wherein the flexible display device comprises a flexible support member and a flexible display screen disposed on the flexible support member, the flexible display screen being disposed on the carrier member via the flexible support member.
The flexible display device according to claim 19, wherein the flexible supporting assembly comprises a first supporting member and a second supporting member arranged in a stacked manner, the first supporting member is fixedly arranged on the carrying assembly, the second supporting member is arranged on a side of the first carrying member away from the carrying assembly, and the flexible display screen is arranged on the second supporting member.