CN111091758B

CN111091758B - Display device

Info

Publication number: CN111091758B
Application number: CN201911316338.7A
Authority: CN
Inventors: 冯子康
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2021-02-26
Anticipated expiration: 2039-12-19
Also published as: WO2021120456A1; CN111091758A

Abstract

The invention provides a display device, which comprises a rear shell, a first rotating shaft, a second rotating shaft and a driving device, wherein the first rear shell is provided with a first rotating shaft and a second rotating shaft; the middle frame comprises a first middle frame connected with the first rear shell through a first rotating shaft and a second middle frame connected with the first rear shell through a second rotating shaft, and the middle frame further comprises a plurality of sliding block assemblies respectively arranged on the side surfaces of the first middle frame and the second middle frame; the support plate is arranged on the middle frame and comprises a first support plate, a second support plate, a third support plate and a fourth support plate which are sequentially arranged adjacently and connected with the corresponding sliding block assemblies; the first display screen is arranged on the supporting plate, the part, opposite to the first supporting plate, of the first display screen is fixed on the first supporting plate, and the part, opposite to the fourth supporting plate, of the first display screen is fixed on the fourth supporting plate. This scheme drives the backup pad on it and forms Y font storage space through rotating first center and second center, makes first display screen accomodate in storage space, has improved display device's portability.

Description

Display device

Technical Field

The invention relates to the technical field of display, in particular to a display device.

Background

With the development of mobile terminals, mobile terminals with large screens are increasingly popular with people.

However, as the screen of the mobile terminal becomes larger, its portability is also reduced. It is therefore necessary to provide a display device having a large screen which is portable.

Disclosure of Invention

The invention provides a display device, which can improve the portability of the display device.

An embodiment of the present invention provides a display device, including:

a rear housing including a first rear housing having a first rotational axis and a second rotational axis;

a middle frame, the middle frame comprising:

the first middle frame is connected with the first rear shell through the first rotating shaft;

the second middle frame is connected with the first rear shell through the second rotating shaft, rotates relative to the first middle frame through the second rotating shaft, and rotates relative to the second middle frame through the first rotating shaft;

a plurality of slider assemblies respectively disposed at lateral sides of the first and second middle frames;

the support plate is arranged on the middle frame and comprises a first support plate, a second support plate, a third support plate and a fourth support plate which are sequentially and adjacently arranged, and the first support plate, the second support plate, the third support plate and the fourth support plate are all connected with corresponding sliding block assemblies;

the first display screen is arranged on the supporting plate, the part, opposite to the first supporting plate, of the first display screen is fixed on the first supporting plate, and the part, opposite to the fourth supporting plate, of the first display screen is fixed on the fourth supporting plate.

In one embodiment, the first rotating shaft and the second rotating shaft are both gear shafts, a first gear is arranged at the end part of the first middle frame, and a second gear is arranged at the end part of the second middle frame;

when the first gear is inserted on the first rotating shaft and the second gear is inserted on the second rotating shaft, the gears of the first gear and the second gear are meshed with each other.

In an embodiment, the first middle frame includes a first frame, a second frame, and a first connecting member, the first frame and the second frame are disposed oppositely, and the first connecting member connects bottoms of the first frame and the second frame;

the second middle frame comprises a third frame, a fourth frame and a second connecting piece, the third frame and the fourth frame are arranged oppositely, and the second connecting piece is connected with the bottoms of the third frame and the fourth frame.

In an embodiment, the first frame, the second frame, the third frame and the fourth frame are provided with sliding grooves, and the sliding grooves are used for installing corresponding sliding block assemblies.

In one embodiment, the sliding block component is provided with a fixed shaft;

the first support plate, the second support plate, the third support plate and the fourth support plate are all provided with fixing holes;

when the supporting plate is arranged on the middle frame, the fixing shaft is inserted into the corresponding fixing hole.

In an embodiment, the side surfaces of the first middle frame and the second middle frame are provided with first fixing pieces, the rear shell further comprises a second rear shell and a third rear shell, and the side surfaces of the second rear shell and the third rear shell are provided with second fixing pieces;

when the display device is assembled, the second rear shell is fixed on the first middle frame through the first fixing piece and the second fixing piece, and the third rear shell is fixed on the second middle frame through the first fixing piece and the second fixing piece.

In an embodiment, the display device further includes a second display screen, and the second display screen is disposed on a side of the second rear shell away from the first middle frame.

In one embodiment, the display device further includes:

a battery disposed on an inner surface of the second rear case;

a system board disposed on an inner surface of the third rear case.

In one embodiment, the display device further includes:

a first bus bar connecting the battery and the system board;

the second flat cable is connected with the second display screen and the system board;

wherein the first flat cable and the second flat cable are fixed on the inner surface of the first rear shell.

In one embodiment, the display device further includes:

a first inductor disposed at an inner surface of the second rear case;

a second inductor disposed at an inner surface of the third rear case;

and the controller is used for controlling the screen turning-off and the screen lighting of the first display screen and the second display screen according to the change of the distance between the first sensor and the second sensor.

In an embodiment, the second rear housing has an earphone hole and a first microphone hole on a side surface thereof, the third rear housing has a usb opening and a second microphone hole on a side surface thereof, and the third rear housing has a camera hole and a flash lamp hole on a rear surface thereof.

In one embodiment, the display device further comprises a front frame, the front frame is arranged on the first display screen, and the front frame is fixed with the side face of the middle frame.

The display device provided by the embodiment of the invention is provided with a first middle frame and a second middle frame which are rotatably connected with a first rear shell, then a plurality of sliding block assemblies are arranged on the side surfaces of the first middle frame and the second middle frame, then a first supporting plate, a second supporting plate, a third supporting plate and a fourth supporting plate are connected with the corresponding sliding block assemblies, finally the part of the first display screen opposite to the first supporting plate is fixed on the first supporting plate, and the part of the first display screen opposite to the fourth supporting plate is fixed on the fourth supporting plate. When the display device with the structure rotates, the first middle frame and the second middle frame rotate around the first rear shell and drive the supporting plate on the first middle frame to form a Y-shaped storage space, so that the first display screen is stored in the storage space, and the portability of the display device is improved.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is an exploded view of a display device according to an embodiment of the present invention.

Fig. 2 is a schematic front structure view of the display device provided in the embodiment of the present invention after being folded.

Fig. 3 is a schematic view of a folded back structure of the display device according to the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention after being unfolded.

Fig. 5 is a schematic view of a folding scene of the display device according to the embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a middle frame and a rear shell according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of 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.

The embodiment of the invention provides a display device. As shown in fig. 1, fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. The display device 1 includes a rear case 11, a middle frame 12, a support plate 13, and a first display screen 14.

The rear case 11 includes a first rear case 111. The first rear case 111 has a first rotation shaft 1111 and a second rotation shaft 1112. Wherein the first rotating shaft 1111 and the second rotating shaft 1112 may both be gear shafts.

In one embodiment, the rear housing 11 further includes a second rear housing 112 and a third rear housing 113. Wherein, the second fixing member 114 is disposed on the side of each of the second rear case 112 and the third rear case 113. As shown in fig. 1, the second fixing member 114 may be a through hole.

In one embodiment, as shown in fig. 2-4, the second rear case 112 has a side surface provided with a headphone hole 1121 and a first microphone hole 1122. A Universal Serial Bus (USB) opening 1131 and a second microphone hole 1132 are disposed on a side surface of the third rear case 113, and a camera hole 1133 and a flash light hole 1134 are disposed on a back surface of the third rear case 113. Accordingly, components corresponding to the holes and openings are installed inside the second rear case 112 and the third rear case 113. For example, a microphone assembly corresponding to the first microphone hole 1122 is installed at the inner side of the second rear case 112, a camera assembly corresponding to the camera hole 1133 is installed at the inner side of the third rear case 113, and the like.

As shown in fig. 1, the middle frame 12 includes a first middle frame 121, a second middle frame 122, and a plurality of slider assemblies 123. In one embodiment, the first bezel 121 includes a first bezel 1211 and a second bezel 1212. The first frame 1211 and the second frame 1212 are disposed opposite to each other. The second middle frame 122 includes a third frame 1221 and a fourth frame 1222. Wherein, the third border 1221 and the fourth border 1222 are oppositely disposed.

In one embodiment, the first fixing member 124 is disposed on a side surface of each of the first middle frame 121 and the second middle frame 122. Specifically, the first fixing member 124 is disposed on the first, second, third and

fourth frames

1211, 1212, 1221 and 1222. The first fixing member 124 is matched with the second fixing member 114 located at the side of the second rear case 112 and the third rear case 113. When the display device 1 is assembled, the second rear case 112 is fixed to the first middle frame 121 by the first fixing member 124 and the second fixing member 114, and the third rear case 113 is fixed to the second middle frame 122 by the first fixing member 124 and the second fixing member 114.

Specifically, when the second fixing member 114 is a through hole, the first fixing member 124 may be a through hole having the same size and shape as the second fixing member 114. When the display device 1 is assembled, the through holes of the second fixing member 114 and the first fixing member 124 are aligned, then screws are inserted, nuts are installed, the second rear case 112 is fixed to the first middle frame 121, and the third rear case 113 is fixed to the second middle frame 122.

As shown in fig. 1, the end of the first middle frame 121 has a first through hole. Specifically, the first frame 1211 and the second frame 1212 each have a first through hole at an end thereof. After the first rotation shaft 1111 of the first rear case 111 passes through the first through hole, a nut is mounted on the first rotation shaft 1111, so that the first middle frame 121 can be connected to the first rear case 111 through the first rotation shaft 1111.

Similarly, the end of the second middle frame 122 has a second through hole. Specifically, the third bezel 1221 and the fourth bezel 1222 have second through holes at both ends thereof. After the second rotating shaft 1112 of the first rear housing 111 passes through the second through hole, a nut is mounted on the second rotating shaft 1112, so that the second middle frame 122 can be connected with the first rear housing 111 through the second rotating shaft 1112.

To sum up, the first middle frame 121 can rotate relative to the second middle frame 122 through the first rotation shaft 1111. The second middle frame 122 can rotate relative to the first middle frame 121 via a second rotating shaft 1112.

In an embodiment, when the first rotating shaft 1111 and the second rotating shaft 1112 are both gear shafts, the end of the first middle frame 121 is provided with a first gear 1214, and the end of the second middle frame 122 is provided with a second gear 1224. When the first gear 1214 is inserted on the first rotation shaft 1111 and the second gear 1224 is inserted on the second rotation shaft 1112, the gears of the first gear 1214 and the second gear 1224 mesh with each other. Thus, when the first middle frame 121 rotates, the second middle frame 122 can be driven to rotate. Accordingly, when the second middle frame 122 rotates, the first middle frame 121 can be driven to rotate.

Note that the first through hole is provided in the first gear 1214, and the second through hole is provided in the second gear 1224. The first shaft 1111 passes through the first gear 1214, and the first gear 1214 is inserted into the first shaft 1111. The second shaft 1112 passes through the second gear 1224, such that the second gear 1224 is mounted on the second shaft 1112.

In an embodiment, the side surfaces of the first middle frame 121 and the second middle frame 122 are provided with sliding grooves 125. Specifically, the first frame 1211, the second frame 1212, the third frame 1221, and the fourth frame 1222 are all provided with the sliding groove 125.

Correspondingly, the middle frame 12 further includes a plurality of slider assemblies 123. The plurality of slider assemblies 123 are respectively disposed at the sides of the first and second

middle frames

121 and 122. As shown in fig. 1, the slider assembly 123 includes a first slider assembly 1231, a second slider assembly 1232, a third slider assembly 1233, a fourth slider assembly 1234, a fifth slider assembly 1235, a sixth slider assembly 1236, a seventh slider assembly 1237, and an eighth slider assembly 1238.

Wherein, the first and

second slider assemblies

1231 and 1232 are disposed on the first frame 1211, the third and

fourth slider assemblies

1233 and 1234 are disposed on the second frame 1212, the first and

third slider assemblies

1231 and 1233 are disposed opposite to each other, and the second and

fourth slider assemblies

1232 and 1234 are disposed opposite to each other. It should be noted that, when the first middle frame 121 is assembled with the first rear case 111, the first and

third slider assemblies

1231 and 1233 are away from the first rear case 111, and the second and

fourth slider assemblies

1232 and 1234 are close to the first rear case 111.

The fifth and

sixth slider assemblies

1235 and 1236 are disposed on the third rim 1221, and the seventh and

eighth slider assemblies

1237 and 1238 are disposed on the fourth rim 1222, wherein the fifth and

seventh slider assemblies

1235 and 1237 are disposed opposite each other, and the sixth and

eighth slider assemblies

1236 and 1238 are disposed opposite each other. It should be noted that, when the second middle frame 122 is assembled with the first rear case 111, the fifth and

seventh slider assemblies

1235 and 1237 are close to the first rear case 111, and the sixth and

eighth slider assemblies

1236 and 1238 are far from the first rear case 111.

The slider assemblies 123 are mounted in the corresponding slide slots 125, and the slider assemblies 123 can slide in the slide slots 125. In one embodiment, a plurality of fixed shafts 1239 are also provided on each slider assembly 123.

In one embodiment, the first middle frame 121 further includes a first connector 1213. The first connecting member 1213 connects the bottom portions of the first and

second frames

1211 and 1212, so that the first and

second frames

1211 and 1212 are fixed together.

The second middle frame 122 further includes a second connection member 1223. The second connection member 1223 connects the bottom portions of the third rim 1221 and the fourth rim 1222 to fix the third rim 1221 and the fourth rim 1222 together.

Wherein the first connecting member 1213 is provided on the end of the first middle frame 121 having the first through hole, and the second connecting member 1223 is provided on the end of the second middle frame 122 having the second through hole.

The support plate 13 is fixed to the middle frame 12 by the fixing shaft 1239. Specifically, as shown in fig. 1, two opposite side edges of the first supporting plate 13 are respectively provided with a fixing hole 135. When assembling the display device 1, the support plate 13 can be fixed to the middle frame 12 by inserting the fixing shaft 1239 through the corresponding fixing hole 135 and then installing the nut.

As shown in fig. 1, the support plate 13 includes a first support plate 131, a second support plate 132, a third support plate 133, and a fourth support plate 134, which are adjacently disposed in this order.

Two opposite sides of the first support plate 131 are respectively provided with two fixing holes 135, and the first support plate 13 is connected with the first sliding block assembly 1231, the second sliding block assembly 1232, the third sliding block assembly 1233, and the fourth sliding block assembly 1234 through the fixing holes 135.

Two opposite sides of the second support plate 132 are respectively provided with a fixing hole 135, and the second support plate 132 is connected to the second and

fourth slider assemblies

1232, 1234 through the fixing holes 135. It should be noted that the first support plate 131 and the second support plate 132 may be inserted on the same fixed shaft 1239 of the second sliding block assembly 1232, and may be inserted on the same fixed shaft 1239 of the fourth sliding block assembly 1234.

Two fixing holes 135 are respectively formed at two opposite sides of the fourth supporting plate 134. The third support plate 13 passes through the fixing hole 135 and the fifth, sixth, seventh and

eighth slider assemblies

1235, 1236, 1237 and 1238.

Two opposite side edges of the third support plate 133 are respectively provided with a fixing hole 135, and the fourth support plate 134 is connected with the fifth slider assembly 1235 and the seventh slider assembly 1237 through the fixing holes 135. It should be noted that the fourth support plate 134 and the third support plate 133 may be inserted on the same fixed shaft 1239 of the fifth slider assembly 1235, and may be inserted on the same fixed shaft 1239 of the seventh slider assembly 1237.

To sum up, the first support plate 131, the second support plate 132, the third support plate 133, and the fourth support plate 134 are all connected to the corresponding slider assemblies 123.

The first display 14 is disposed on the support plate 13. Wherein, a portion of the first display 14 opposite to the first support plate 131 is fixed on the first support plate 131, and a portion of the first display 14 opposite to the fourth support plate 134 is fixed on the fourth support plate 134. While the portion of the first display 14 opposite to the second support plate 132 is not fixed to the second support plate 132 and the portion of the first display 14 opposite to the third support plate 133 is not fixed to the third support plate 133. The first display 14 is a flexible display, and has a bending performance. When the display device 1 is folded, the first middle frame 121 and the second middle frame 122 rotate around the first rear case 111, and drive the first support plate 131, the second support plate 132, the third support plate 133 and the fourth support plate 134 thereon, so as to form a Y-shaped receiving space as shown in fig. 5. The first display 14 is folded and stored in the Y-shaped storage space.

The first display screen 14 may be used, among other things, to run video applications, gaming applications, mapping applications, etc. that require a larger display screen. Specifically, after the first display screen 14 is folded to the unfolded state, the first display screen 14 automatically lights up, and displays applications required by a large display screen, such as the video application and the game application.

In one embodiment, as shown in fig. 1, the display device 1 further includes a front frame 15, the front frame 15 is disposed on the first display 14, and the front frame 15 is fixed to a side of the middle frame 12. As shown in fig. 1, the front frame 15 includes a first front frame 151 and a second front frame 152. First fixing holes 1511 are formed at both sides of the first front frame 151, and second fixing holes 1521 are formed at both sides of the second front frame 152. The first middle frame 121, the first rear housing 111 and the second middle frame 121 are sequentially connected, and after the supporting plate 13 and the first display screen 14 are sequentially assembled, the first fixing hole 1511 is inserted into the first rotating shaft 1111, and the second fixing hole 1521 is inserted into the second rotating shaft 1112, so that the front frame 15 is fixed on the middle frame 12.

In an embodiment, the display device 1 further includes a second display screen 16, and the second display screen 16 is disposed on a side of the second rear case 112 away from the first middle frame 121. The second display screen 16 may be a flexible screen or a non-flexible screen.

The second display screen 16 may be used to execute applications that do not require a display screen size, such as a telephone application, a text messaging application, a clock application, and the like. Specifically, when a call is made, the second display screen 16 displays incoming call information.

In one embodiment, as shown in fig. 5, after the display device 1 is folded, the first supporting plate 131, the second supporting plate 132, the third supporting plate 133 and the fourth supporting plate 134 form a Y-shaped receiving space, i.e. a sufficient space is provided to accommodate other components.

As shown in fig. 6, the display device 1 further includes a battery 17 and a system board 18. Wherein the battery 17 is disposed on the inner surface of the second rear case 112. The system board 18 is disposed on an inner surface of the third rear case 113.

Accordingly, the display device 1 further includes: a first row line 19 and a second row line 20, wherein the first row line 19 connects the battery 17 and the system board 18. A second flat cable 20 connects the second display screen 16 and the system board 18. In one embodiment, the portions of the first flat cable 19 and the second flat cable 20 passing through the inner surface of the first rear case 111 are fixed to the inner surface of the first rear case 111.

Further, the display device 1 further includes a fourth flat cable 21, a fifth flat cable 22 and a sixth flat cable 23. The fourth flat cable 21 is used for connecting the first display screen 14 and the system board 18. The fifth row of wires 22 is used to connect the switch assembly to the system board 18. The sixth flat cable 23 is used to connect the USB and the system board 18.

In one embodiment, the display device 1 further includes: the sensor comprises a first sensor, a second sensor and a controller. Wherein the first inductor is disposed on an inner surface of the second rear case 112. The second inductor is disposed on the inner surface of the third rear case 113. The controller is used for controlling the screen turning-off and the screen lighting of the first display screen and the second display screen according to the change of the distance between the first sensor and the second sensor.

For example, when the display device 1 is in the unfolded state to the folded state, the controller detects that the distance between the first sensor and the second sensor gradually decreases, and then the controller controls the first display screen to turn off, and the second display screen to turn on. When the display device 1 is in the folded state and the unfolded state, the controller detects that the distance between the first sensor and the second sensor is gradually increased, the controller controls the first display screen to be on, and the second display screen is off.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The display device provided by the embodiment of the present application is described in detail above, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the description of the above embodiment is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A display device, comprising:

a middle frame, the middle frame comprising:

the first display screen is arranged on the supporting plate, the part of the first display screen, which is opposite to the first supporting plate, is fixed on the first supporting plate, and the part of the first display screen, which is opposite to the fourth supporting plate, is fixed on the fourth supporting plate;

the first middle frame comprises a first frame, a second frame and a first connecting piece, the first frame and the second frame are arranged oppositely, and the first connecting piece is connected with the bottoms of the first frame and the second frame;

2. The display device according to claim 1, wherein the first rotating shaft and the second rotating shaft are both gear shafts, a first gear is arranged at an end of the first middle frame, and a second gear is arranged at an end of the second middle frame;

3. The display device according to claim 1, wherein the first, second, third and fourth rims are each provided with a sliding groove for mounting a corresponding sliding block assembly.

4. The display device according to claim 1, wherein a fixed shaft is provided on the slider assembly;

5. The display device according to claim 1, wherein the first middle frame and the second middle frame are provided with first fixing members on side surfaces thereof, the rear case further comprises a second rear case and a third rear case, and the second rear case and the third rear case are provided with second fixing members on side surfaces thereof;

6. The display device according to claim 5, further comprising a second display screen disposed on a side of the second rear case away from the first middle frame.

7. The display device according to claim 6, further comprising:

a battery disposed on an inner surface of the second rear case;

a system board disposed on an inner surface of the third rear case.

8. The display device according to claim 7, further comprising:

a first bus bar connecting the battery and the system board;

9. The display device according to claim 6, further comprising:

a first inductor disposed at an inner surface of the second rear case;

a second inductor disposed at an inner surface of the third rear case;

10. The display device according to claim 5, wherein the second rear case is provided with an earphone hole and a first microphone hole at a side thereof, the third rear case is provided with a universal serial bus opening and a second microphone hole at a side thereof, and the third rear case is provided with a camera hole and a flash hole at a rear thereof.

11. The display device according to claim 1, further comprising a front frame provided on the first display screen, the front frame being fixed to a side surface of the middle frame.