Display device

Abstract

The application provides a display device, comprising: a back plate comprising a back plate body and a support, the support being provided with a first through hole; a display panel arranged on the back plate body; a printed circuit board arranged on the support, the printed circuit board being provided with a second through hole; a flexible circuit board, one end of the flexible circuit board being connected with the display panel and the other end being connected with the printed circuit board; a fastener, the fastener passing through the second through hole and the first through hole to connect the printed circuit board with the support; a sleeve, the sleeve being at least partially located in the first through hole and between the printed circuit board and the support; one end of the fastener being connected with the sleeve; the printed circuit board being provided with a protruding portion on a side close to the support; the fastener being rotatable; the sleeve being in abutment with the protruding portion; and the flexible circuit board being in an unfolded state. The display device provided by the application can improve the abnormal sound problem caused by the arching or folding of the FPC due to the displacement of the PCB during the assembly of the existing flat display device.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display device. Background Technology

[0002] Currently, laptop internal modules are mainly divided into two types: flat and bent. Flat printed circuit boards (PCBs) are fixed to the backplate bracket with screws, while flexible printed circuit boards (FPCs) connect the display panel and the PCB through bonding technology. Ideally, after the display panel and backlight module are assembled, the PCB is fixed with screws, and the FPC is in a naturally tilted and flat state (e.g., ...). Figure 1 As shown in the image, during actual assembly, due to factors such as display panel assembly deviations and screw torque, the PCB may move inward, squeezing the FPC and causing the FPC to bulge (as shown in the image). Figure 2 As shown in the figure, due to the limitations of the FPC material itself, when the FPC arches or wrinkles, external force presses on the FPC, causing the FPC to collide with the air and PCB, which will produce abnormal noise (papa noise). Summary of the Invention

[0003] This application provides a display device to improve the problem of abnormal noise caused by FPC arching or wrinkling due to PCB displacement during the assembly of existing flat display devices.

[0004] This application provides a display device, including:

[0005] A backplate includes a backplate body and a bracket, one end of which is connected to the backplate body, and the other end of which extends away from the backplate body. A first through hole is provided on the bracket.

[0006] The display panel is mounted on the back panel body;

[0007] A printed circuit board is disposed on the bracket, and the printed circuit board is provided with a second through hole opposite to the first through hole;

[0008] A flexible circuit board is disposed on the printed circuit board, with one end of the flexible circuit board connected to the display panel and the other end connected to the printed circuit board;

[0009] Fasteners pass through the second through hole and the first through hole to connect the printed circuit board to the bracket;

[0010] A sleeve, at least partially located within the first through hole and between the printed circuit board and the bracket; one end of the fastener is connected to the sleeve;

[0011] The printed circuit board has a protrusion on the side near the bracket, the fastener is rotatable, the sleeve abuts against the protrusion, and the flexible circuit board is in an extended state.

[0012] In one embodiment, the sleeve includes a sleeve body and an extension connected to the sleeve body;

[0013] The sleeve body is located inside the first through hole, and the fastener is connected to the sleeve body;

[0014] The extension is located within the receiving space between the printed circuit board and the bracket, and extends in a direction away from the fastener, and the extension abuts against the protrusion.

[0015] In one embodiment, the sleeve body is fixedly connected to the fastener, and under the drive of the fastener, the sleeve body rotates within the first through hole and drives the extension to rotate within the receiving space.

[0016] In one embodiment, the extension is provided with a groove, and the end of the protrusion away from the printed circuit board is engaged in the groove.

[0017] In one embodiment, the groove is located on the side of the extension near the protrusion.

[0018] In one embodiment, the sleeve body is fixedly connected to the bracket, and the inner diameter of the sleeve body gradually decreases along the direction from the printed circuit board to the bracket. The end of the extension away from the fastener extends in a direction away from the central axis of the first through hole as the fastener rotates.

[0019] In one embodiment, the sleeve body is threadedly connected to the bracket, and / or the sleeve body is threadedly connected to the fastener.

[0020] In one embodiment, the sleeve body has a U-shaped cross-section, has side walls and a bottom, the side walls enclose to form a hollow cylinder, the bottom covers one end opening of the cylinder, and the fastener passes through the other end opening of the cylinder, extends into the cylinder, and abuts against the sleeve body.

[0021] In one embodiment, the extension is a ring-shaped structure or a fan-shaped structure.

[0022] In one embodiment, the bracket has a recess on the side near the printed circuit board, the extension is disposed in the recess, and the extension and the protrusion are received in the recess.

[0023] This application provides a display device including a sleeve, at least partially located between a printed circuit board (PCB) and a support. The PCB has a protrusion on its side near the support. When a fastener is rotated, the sleeve abuts against the protrusion, causing the PCB to move or stretch away from the backplate. A flexible circuit board connected to the PCB extends synchronously away from the backplate, preventing the flexible circuit board from arching or wrinkling. Therefore, the display device provided by this application can effectively improve the problem of abnormal noise caused by PCB arching or wrinkling during assembly of existing flat display devices. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a flexible circuit board in a flattened state of a display device provided in the prior art.

[0026] Figure 2 This is a schematic diagram of the arched state of a flexible circuit board in a display device provided in the prior art.

[0027] Figure 3 This is a schematic diagram of state A of a display device provided in an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of state B of a display device provided in an embodiment of this application;

[0029] Figure 5 for Figure 4 A top view of a sleeve of a display device provided in the embodiment;

[0030] Figure 6 for Figure 4 A top view of the sleeve of another display device provided in the embodiment;

[0031] Figure 7 This is a schematic diagram of state A of another display device provided in an embodiment of this application;

[0032] Figure 8This is a schematic diagram of state B of another display device provided in an embodiment of this application;

[0033] Figure 9 for Figure 8 A top view of a sleeve of a display device provided in the embodiment;

[0034] Figure 10 for Figure 8 A top view of the sleeve of another display device provided in the embodiment. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "upper," "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Reference numerals and / or reference letters may be repeated in different embodiments of this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various implementations and / or settings discussed.

[0038] like Figures 3-4 As shown, a display device provided in this application includes a back plate 110, a display panel 200, a printed circuit board (PCB) 300, a flexible circuit board (FPC) 400, a fastener 500, and a sleeve 600.

[0039] The backplate 110 includes a backplate body 111 and a bracket 112. The backplate body 111 is used to support the display panel 200, and the bracket 112 is used to support the printed circuit board 300.

[0040] The bracket 112 has two opposing ends. One end of the bracket 112 is connected to the back panel body 111, and the other end of the bracket 112 extends away from the back panel body 111. The bracket 112 and the back panel body 111 extend in the same direction (as shown by the X direction in the figure), and can be applied to flat display modules. The bracket 112 can be an independent structure connected to the back panel body 111; or the bracket 112 can be an integral structure with the back panel body 111, for example, by breaking open the edge of the back panel body 111 and folding it outward to form the bracket 112. The bracket 112 is provided with a first through hole 101 to cooperate with the fastener 500.

[0041] The back panel body 111 includes a bottom plate and a side plate, which together form a receiving cavity. The display device further includes a reflective layer 120, a light guide plate (LGP) 130, an optical film layer group 140, and a light source 150 located on the side of the light guide plate 130, all stacked sequentially within the receiving cavity. The back panel 110, the reflective layer 120, the light guide plate 130, the optical film layer group 140, and the light source 150 together constitute the backlight module of the display device, providing a backlight source for the display panel 200.

[0042] The display panel 200 is disposed on the back panel body 111. Specifically, the display panel 200 is located on the side of the optical film layer group 140 away from the back panel 110, and the edge of the display panel 200 is supported on the side panel. The display panel 200 may be, but is not limited to, a liquid crystal display (LCD) panel.

[0043] The printed circuit board 300 is disposed on the bracket 112. The printed circuit board 300 has a second through hole 301 opposite to the first through hole 101, that is, the first through hole 101 and the second through hole 301 are connected. The first through hole 101 and the second through hole 301 have the same central axis. The second through hole 301 serves as a mounting hole for mounting the fastener 500.

[0044] The flexible circuit board 400 is disposed on the printed circuit board 300, specifically on the side of the printed circuit board 300 away from the support 112. One end of the flexible circuit board 400 is connected to the printed circuit board 300, and the other end is connected to the display panel 200. The flexible circuit board 400 electrically connects the printed circuit board 300 and the display panel 200 to transmit electrical signals.

[0045] The fastener 500 is used to secure the printed circuit board 300. The fastener 500 passes through the second through hole 301 and the first through hole 101 to connect the printed circuit board 300 to the bracket 112. The fastener 500 can be a bolt or the like, but is not limited thereto.

[0046] The sleeve 600 is at least partially located within the first through hole 101 and between the printed circuit board 300 and the bracket 112; one end of the fastener 500 is connected to the sleeve 600.

[0047] The printed circuit board 300 has a protrusion 310 on the side near the support 112. The fastener 500 is rotatable, causing the sleeve 600 to abut against the protrusion 310, thereby allowing the flexible circuit board 400 to extend. The protrusion 310 is located on the side of the fastener 500 away from the backplate body 111. The protrusion 310 can be a separate structure connected to the printed circuit board 300, or it can be integrally formed with the printed circuit board 300.

[0048] The display device of this application includes the sleeve 600, which is at least partially located between the printed circuit board 300 and the bracket 112. The printed circuit board 300 is also provided with the protrusion 310 on the side near the bracket 112. During the rotation of the fastener 500, the sleeve 600 can be moved until the sleeve 600 abuts against the protrusion 310. The protrusion 310 is subjected to the abutting force of the sleeve 600, causing the printed circuit board 300 to move or stretch away from the back plate body 111. The flexible circuit board 400, connected to one end of the printed circuit board 300, stretches synchronously with the printed circuit board 300 away from the back plate body 111, thereby preventing the flexible circuit board 400 from arching or wrinkling.

[0049] In one embodiment, such as Figures 3-4 As shown, the sleeve 600 includes a sleeve body 610 and an extension 620 connected to the sleeve body 610. The sleeve body 610 is located within the first through hole 101 and connected to the bracket 112, and the fastener 500 is connected to the sleeve body 610. The extension 620 is located within the receiving space between the printed circuit board 300 and the bracket 112, and extends in a direction parallel to the printed circuit board 300 away from the fastener 500. The extension 620 abuts against the protrusion 310.

[0050] In one embodiment, such as Figures 3-4As shown, the sleeve body 610 is fixedly connected to the fastener 500, that is, the sleeve body 610 is sleeved on the fastener 500 and fixed to the fastener 500, so that the sleeve 600 can rotate together with the fastener 500 along the circumference of the fastener 500. Under the drive of the fastener 500, the sleeve body 610 rotates within the first through hole 101 and drives the extension 620 to rotate within the receiving space.

[0051] Furthermore, the sleeve body 610 has a U-shaped cross-section, with a side wall 601 and a bottom 602. The side wall 601 encloses and forms a hollow cylinder, and the bottom 602 covers one end opening of the cylinder. The fastener 500 passes through the other end opening of the cylinder, extends into the cylinder, and abuts against the bottom 602 to further restrict the displacement of the fastener 500 in the Y direction. At the same time, the sleeve body 610 and the fastener 500 are abutted and fixed, ensuring the stability of the connection.

[0052] The extension 620 is connected to the edge of the opening side of the sleeve body 610. The extension 620 can be integrally formed with the sleeve body 610, for example, the edge of the sleeve body 610 can be folded to form the extension 620 for ease of processing. In other embodiments, the extension 620 can also be a separate structure, connected to the edge of the opening side of the sleeve body 610 by welding or bonding, or connected to the outer side wall of the sleeve body 610.

[0053] Combination Figure 3 and Figure 4 ,like Figure 3 The diagram shown is a schematic representation of state A of a display device according to an embodiment of this application. State A represents the state where the printed circuit board 300 is mounted on the bracket 112, and the flexible circuit board 400 is bent or wrinkled due to installation tolerances. In this state, the protrusion 310 and the extension 620 are not in contact. Figure 4 The diagram shown is a schematic diagram of state B of a display device provided in an embodiment of this application. State B is a schematic diagram in which, after rotating the fastener 500, the extension 620 finally abuts against the protrusion 310, and the flexible circuit board 400 is in an extended state.

[0054] Initially, the protrusion 310 is not in contact with the extension 620, and the flexible circuit board 400 is in a wrinkled state. After the fastener 500 is inserted into the sleeve body 610, the fastener 500 is rotated to fix the sleeve 600 to the fastener 500. The fastener 500 is rotated again to make the sleeve 600 and the fastener 500 rotate synchronously. During the rotation, the sleeve 600 and the fastener 500 move upward in the Y direction relative to the bracket 112, that is, the extension 620 moves towards the printed circuit board. As the circuit board 300 moves in the direction of the extension 620, the extension 620 applies an upward squeezing force to the protrusion 310, causing the printed circuit board 300 to move in the X direction away from the back panel body 111. One end of the flexible circuit board 400 is connected to the printed circuit board 300. The end of the flexible circuit board 400 connected to the printed circuit board 300 will stretch out in sync with the printed circuit board 300 in the direction away from the back panel body 111, ultimately making the flexible circuit board 400 flat, thereby avoiding the flexible circuit board 400 from arching or wrinkling.

[0055] Furthermore, the protrusion 310 has an inclined surface on the side near the fastener 500, meaning that the cross-sectional area of ​​the protrusion 310 gradually decreases from the end near the printed circuit board to the end near the bracket. This inclined surface arrangement of the protrusion 310 near the fastener 500 facilitates movement of the protrusion 310 away from the backplate body 111 when the fastener 500 is rotated.

[0056] Furthermore, such as Figures 4-5 As shown, a groove 621 is provided on the extension 620, and one end of the protrusion 310 away from the printed circuit board 300 is engaged in the groove 621. During assembly, the fastener 500 is first passed through the first through hole 101 and inserted into the sleeve 600 to fix the fastener 500 to the sleeve 600 and connect the printed circuit board 300 to the bracket 112. Then, the fastener 500 is twisted again. Since the sleeve 600 is fixed to the fastener 500, the fastener 500 drives the sleeve 600 to rotate together until the groove 621 on the extension 620 is opposite to the protrusion 310 on the printed circuit board 300. The protrusion 310 is engaged in the groove 621, and the inner sidewall of the groove 621 abuts against the protrusion 310. The groove 621 can limit the protrusion 310, maintain the force of the extension 620 on the protrusion 310, and thus ensure that the flexible circuit board 400 always remains flat and maintains the stability of the entire structure.

[0057] Furthermore, such as Figures 4-5 As shown, the groove 621 is located on the side of the extension 620 near the protrusion 310. For example, the groove 621 can be provided at the edge of the extension 620. The groove 621 facing the inner wall of the protrusion 310 can be provided as an inclined surface opposite to the inclined surface of the protrusion 310, so that when the protrusion 310 abuts against the groove 621, the contact surfaces of the two fit together.

[0058] In this embodiment, as Figures 5-6 As shown, the extension 620 can be a ring-shaped structure or a fan-shaped structure. For example, Figure 5 As shown, the extension 620 may be an annular structure surrounding the sleeve body 610; as Figure 6 As shown, the extension 620 can be a fan-shaped structure. For example, the arc length of the end of the extension 620 away from the sleeve body 610 can be greater than the arc length of the end closer to the sleeve body 610. The circular or fan-shaped extension 620 is fixed to the sleeve body 610 and rotates together with the fastener 500. When the fastener 500 rotates, the extension 620 moves toward the printed circuit board 300, and the extension 620 applies an upward pressing force to the protrusion 310, causing the printed circuit board 300 to move in the X direction toward the direction away from the back plate body 111 until the protrusion 310 engages with the groove 621 on the extension 620, so that the flexible circuit board 400 is in an extended state.

[0059] In this embodiment, the sleeve body 610 is disposed within the first through hole 101, and is rotatably connected to the bracket 112 along the circumference of the first through hole 101. When assembling the sleeve 600, the sleeve body 610 can first be fixed within the first through hole 101, with the outer diameter of the sleeve body 610 matching the diameter of the first through hole 101, so that the sleeve 600 can be inserted into the first through hole 101, and the sleeve body 610 can rotate circumferentially within the first through hole 101. The fastener 500 is inserted into the sleeve body 610, and the sleeve body 610 is fixed to the fastener 500, rotating together with the fastener 500. Thus, by rotating the fastener 500, the sleeve body 610 can be rotated, causing the extension 620 to move circumferentially along the sleeve body 610, controlling the relative position of the groove 621 and the protrusion 310, thereby adjusting the position of the printed circuit board 300, and ultimately allowing the flexible circuit board 400 to stretch out.

[0060] In another embodiment, such as Figures 7-8 As shown, the sleeve body 610 is fixedly connected to the bracket 112. Along the direction from the printed circuit board 300 to the bracket 112, the inner diameter of the sleeve body 610 gradually decreases. The end of the extension 620 away from the fastener 500 extends away from the central axis of the first through hole 101 as the fastener 500 rotates.

[0061] In this embodiment, the sleeve 600 is fixed to the bracket 112, that is, the sleeve body 610 does not rotate within the first through hole 101. Because the inner diameter of the sleeve body 610 is wider at the top and narrower at the bottom, as the fastener 500 rotates, that is, as the fastener 500 moves downward relative to the sleeve body 610, when the lower end of the fastener 500 rotates into the narrow diameter of the sleeve body 610, the extension 620 of the sleeve 600 will extend in a direction away from the central axis of the first through hole 101. The end of the extension 620 away from the fastener 500 abuts against the protrusion 310, and drives the printed circuit board 300 as a whole to move in the X direction away from the back plate body 111. One end of the flexible circuit board 400 is connected to the printed circuit board 300. The end of the flexible circuit board 400 connected to the printed circuit board 300 will stretch out in a direction away from the back plate body 111 in sync with the printed circuit board 300, so that the flexible circuit board 400 is in a flat state, thereby avoiding the flexible circuit board 400 from arching or wrinkling. This embodiment allows for flexible adjustment of the rotation of the fastener 500 based on the specific circumstances of the flexible circuit board 400's arching or wrinkling, making operation more convenient and adaptable.

[0062] In this embodiment, as Figures 9-10 As shown, the extension 620 can be a ring-shaped structure or a fan-shaped structure. For example, Figure 9 As shown, the extension 620 may be an annular structure surrounding the sleeve body 610; as Figure 10 As shown, the extension 620 can be a fan-shaped structure, and the sleeve 600 can include at least one of the extensions 620. For example, the sleeve 600 can include two fan-shaped extensions 620, one of which is located on the side close to the protrusion 310. The two extensions 620 can be symmetrically arranged to ensure uniform force distribution.

[0063] In the above embodiments of this application, the sleeve body 610 can be threadedly connected to the bracket 112. A first threaded protrusion is provided on one of the outer sidewall of the sleeve body 610 and the inner sidewall of the first through hole 101, and a first threaded groove matching the first threaded protrusion is provided on the other side. For example, as shown... Figure 4As shown, a first threaded protrusion 102 is provided on the inner sidewall of the first through hole 101, and a first threaded groove 611 that mates with the first threaded protrusion 102 is provided on the outer sidewall of the sleeve body 610, so as to facilitate the installation and connection of the sleeve body 610 and the bracket 112, and to keep the sleeve body 610 and the bracket 112 relatively fixed in a direction perpendicular to the back plate 110 (Y direction).

[0064] The sleeve body 610 can be threadedly connected to the fastener 500. A second threaded protrusion is provided on one of the inner sidewall of the sleeve body 610 and the outer sidewall of the fastener 500, and a second threaded groove matching the second threaded protrusion is provided on the other side. For example, ... Figure 4 As shown, a second threaded protrusion 612 is provided on the inner side wall of the sleeve body 610, and a second threaded groove 501 that mates with the second threaded protrusion 612 is provided on the outer side wall of the fastener 500, so as to facilitate the installation and connection of the sleeve body 610 and the fastener 500.

[0065] In one embodiment, such as Figure 4 and Figure 8 As shown, a recess 1121 is provided on the side of the bracket 112 near the printed circuit board 300. The depth of the recess 1121 can be greater than the thickness of the extension 620. The distance from the edge of the recess 1121 to the central axis of the first through hole 101 is greater than the distance from the side of the extension 620 away from the back plate body 111 to the central axis of the second through hole 301. The printed circuit board 300 is supported on the upper surface of the bracket 112. The extension 620 is housed in the recess 1121 to avoid the thickness of the extension 620 interfering with the mounting height of the printed circuit board 300, while ensuring that the printed circuit board 300 moves as a whole away from the back plate body 111. When the extension 620 abuts against the protrusion 310, the extension 620 can always be housed in the recess 1121. The distance from the edge of the recess 1121 to the central axis of the first through hole 101 is greater than the distance from the side of the protrusion 310 away from the back plate body 111 to the central axis of the second through hole 301, so that the protrusion 310 is also accommodated in the recess 1121, while providing rotation space for the extension 620 to avoid affecting the installation of the printed circuit board 300.

[0066] In this application, the diameter of the second through hole 301 can be larger than the diameter of the first through hole 101, so as to provide a certain amount of redundant space when assembling the fastener 500 and the printed circuit board 300 to reduce the influence of assembly deviation or component tolerance, and facilitate assembly.

[0067] In summary, this application provides a display device including a sleeve, which is at least partially located between a printed circuit board (PCB) and a support. The PCB has a protrusion on its side near the support. When a fastener is rotated, the sleeve abuts against the protrusion, causing the PCB to move or stretch away from the backplate. A flexible circuit board connected to the PCB extends synchronously away from the backplate, preventing the flexible circuit board from arching or wrinkling. Therefore, the display device provided by this application can effectively improve the problem of abnormal noise caused by PCB arching or wrinkling during assembly of existing flat display devices.

[0068] In summary, although the present application has disclosed the preferred embodiments as described above, the above preferred embodiments are not intended to limit the present application. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be determined by the scope defined in the claims.

Claims

1. A display device, characterized in that, include: A backplate includes a backplate body and a bracket, one end of which is connected to the backplate body, and the other end of which extends away from the backplate body. A first through hole is provided on the bracket. The display panel is mounted on the back panel body; A printed circuit board is disposed on the bracket, and the printed circuit board is provided with a second through hole opposite to the first through hole; A flexible circuit board is disposed on the printed circuit board, with one end of the flexible circuit board connected to the display panel and the other end connected to the printed circuit board; Fasteners pass through the second through hole and the first through hole to connect the printed circuit board to the bracket; A sleeve, at least partially located within the first through hole and between the printed circuit board and the bracket; one end of the fastener is connected to the sleeve; The printed circuit board has a protrusion on the side near the bracket, the fastener is rotatable, the sleeve abuts against the protrusion, and the flexible circuit board is in an extended state.

2. The display device according to claim 1, characterized in that, The sleeve includes a sleeve body and an extension connected to the sleeve body; The sleeve body is located inside the first through hole, and the fastener is connected to the sleeve body; The extension is located within the receiving space between the printed circuit board and the bracket and extends in a direction away from the fastener, and the extension abuts against the protrusion.

3. The display device according to claim 2, characterized in that, The sleeve body is fixedly connected to the fastener. Driven by the fastener, the sleeve body rotates within the first through hole and drives the extension to rotate within the receiving space.

4. The display device according to claim 3, characterized in that, The extension is provided with a groove, and the end of the protrusion away from the printed circuit board is engaged in the groove.

5. The display device according to claim 4, characterized in that, The groove is located on the side of the extension near the protrusion.

6. The display device according to claim 2, characterized in that, The sleeve body is fixedly connected to the bracket. Along the direction from the printed circuit board to the bracket, the inner diameter of the sleeve body gradually decreases. The end of the extension away from the fastener extends away from the center axis of the first through hole as the fastener rotates.

7. The display device according to any one of claims 2-6, characterized in that, The sleeve body is threadedly connected to the bracket, and / or the sleeve body is threadedly connected to the fastener.

8. The display device according to any one of claims 2-6, characterized in that, The sleeve body has a U-shaped cross-section, with side walls and a bottom. The side walls enclose a hollow cylinder, and the bottom seals one end opening of the cylinder. The fastener passes through the other end opening of the cylinder and extends into the cylinder to abut against the sleeve body.

9. The display device according to any one of claims 2-6, characterized in that, The extension is a ring-shaped structure or a fan-shaped structure.

10. The display device according to any one of claims 2-6, characterized in that, The bracket has a recessed groove on the side near the printed circuit board, and the extension and the protrusion are housed in the recessed groove.

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