CN216351649U

CN216351649U - Display screen

Info

Publication number: CN216351649U
Application number: CN202122984746.9U
Authority: CN
Inventors: 唐广文; 王春
Original assignee: Shenzhen Honghe Innovation Information Technology Co Ltd
Current assignee: Shenzhen Honghe Innovation Information Technology Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-04-19
Anticipated expiration: 2031-11-30

Abstract

The application belongs to the technical field of show, provides a display screen, including backplate, center, frame, protection apron, liquid crystal display panel and backlight unit, the center is fixed on the backplate with backlight unit, and the frame encloses the outside of locating the center and is connected with the backplate. The middle frame comprises a first mounting part and a second mounting part, and the first mounting part and the second mounting part form a step structure; at least one group of opposite sides of the protective cover plate are fixed on the first mounting part; at least one group of opposite sides of the liquid crystal panel are fixed on the second mounting part; the first mounting part is provided with a convex rib for limiting the protective cover plate; the outer frame is pressed against the outer surface of the protective cover plate. The display screen structure can improve the assembly efficiency and reduce the material cost, and meanwhile, the structure is more stable and compact.

Description

Display screen

Technical Field

The application belongs to the technical field of display, and more specifically relates to a display screen.

Background

At present, commercial display screen generally includes protection apron, LCD panel and backplate isotructure, and when will protect apron, LCD panel isotructure to install on the backplate, often need a plurality of fixed subassemblies to connect fixedly, and the screw that uses is more and the equipment is loaded down with trivial details, and it is time-consuming many, inefficiency, and material cost is higher.

Disclosure of Invention

The utility model mainly aims to provide a display screen, so as to improve the assembly efficiency of the display screen and reduce the material cost of the display screen.

In order to achieve the above object, the present application provides a display screen, including a back plate, a middle frame, an outer frame, a protective cover plate, a liquid crystal panel, and a backlight module, where the middle frame and the backlight module are fixed on the back plate, the outer frame is surrounded on the outer side of the middle frame and connected to the back plate, the middle frame includes a first installation portion and a second installation portion, the first installation portion and the second installation portion form a step structure, and the height of the first installation portion is greater than that of the second installation portion; at least one group of opposite sides of the protective cover plate are fixed on the first mounting part; at least one group of opposite sides of the liquid crystal panel are fixed on the second mounting part; the first mounting part is provided with a convex rib for limiting the protective cover plate; the outer frame is pressed against the outer surface of the protective cover plate.

In the embodiment of the utility model, the convex rib is arranged at the edge position of the first mounting part close to the outer frame.

In an embodiment of the present invention, the height of the rib is not greater than the thickness of the protective cover plate.

In the embodiment of the utility model, the height of the first installation part is matched with the thickness of the liquid crystal panel.

In the embodiment of the utility model, the middle frame is of a quadrilateral structure, the step structures are arranged on four sides of the middle frame, and the convex ribs are arranged on the first mounting parts.

In the embodiment of the utility model, the middle frame is of an integrally formed structure.

In the embodiment of the utility model, the protective cover plate is bonded with the first mounting part; the liquid crystal panel is bonded to the second mounting portion.

In the embodiment of the utility model, the lower surface of the protective cover plate is bonded with the upper surface of the liquid crystal panel, and the bonding area of the protective cover plate and the liquid crystal panel is in the area corresponding to the second mounting part in the direction vertical to the liquid crystal panel.

In the embodiment of the utility model, the middle frame is provided with an accommodating groove which is communicated with the bottom surface and the inner side surface of the middle frame, and the backlight module is partially accommodated in the accommodating groove.

In an embodiment of the present invention, the backlight module includes a reflective sheet, a diffusion plate, and an optical film, the reflective sheet, the diffusion plate, and the optical film are stacked on the back plate, and edges of the reflective sheet, the diffusion plate, and the optical film are all embedded in the accommodating groove.

The display screen provided by the utility model has the beneficial effects that: compared with the prior art, the convex ribs are arranged on the step structure of the middle frame, the protective cover plate can be transversely limited, the protective cover plate and the middle frame are prevented from generating transverse position deviation, and a limiting structure is not required to be additionally arranged. This center structure is succinct and stable good, with the frame cooperation for the equipment of protection apron, liquid crystal display panel and backplate is high-efficient swift, stable in structure more, and has saved the material cost to a certain extent.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a display screen according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display screen according to another embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10-a back plate; 11-positioning and folding; 20-middle frame; 21-a first mounting portion; 22-a second mounting portion; 23-a convex rib; 24-accommodating grooves; 30-an outer frame; 31-a connecting portion; 32-a lap joint; 33-a receiving groove; 34-a groove; 40-a protective cover plate; 50-a liquid crystal panel; 60-a backlight module; 61-a reflector plate; 62-a diffuser plate; 63-an optical film; 70-an infrared touch component; 71-infrared touch pad; 72-infrared filter strip; 80-a tie layer; 90-connecting piece.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, a display screen provided by an embodiment of the utility model will be described. The display screen includes a back plate 10, a middle frame 20, an outer frame 30, a protective cover plate 40, a liquid crystal panel 50 and a backlight module 60.

In the embodiment of the utility model, the direction which is vertical to the liquid crystal panel and points to the viewing area is defined as up, and the opposite direction is defined as down; the direction parallel to the liquid crystal panel and pointing to the center of the liquid crystal panel is defined as inner, and the opposite direction is defined as outer.

Referring to fig. 1, the middle frame 20 and the backlight module 60 are fixed on the back plate 10, and the outer frame 30 surrounds the middle frame 20 and is connected to the back plate 10. The back plate 10 is a main bearing structure of the display screen; the middle frame 20 is mainly used for fixing the protective cover plate 40 and the liquid crystal panel 50; the backlight module 60 provides a backlight source for the liquid crystal panel 50, so that the liquid crystal panel 50 displays a picture. The protective cover 40 protects the liquid crystal panel 50, and can prevent the screen from being damaged due to direct contact with the liquid crystal panel 50 during touch writing. The protective cover 40 is a transparent material, typically tempered glass. The outer frame 30 surrounds the outer side of the middle frame 20 and presses against the upper surface of the protective cover 40, so as to press the protective cover 40 and play a role in protection.

Referring to fig. 1, the middle frame 20 includes a first mounting portion 21 and a second mounting portion 22, the first mounting portion 21 and the second mounting portion 22 form a step structure, the height of the first mounting portion 21 is greater than the height of the second mounting portion 22, and the height refers to the height relative to the relative position of the back plate 10. The protective cover 40 and the liquid crystal panel 50 are fixedly mounted on the stepped structure, wherein the protective cover 40 is mounted on the upper surface of the first mounting portion 21, the liquid crystal panel 50 is mounted on the upper surface of the second mounting portion 22, and the side portion of the liquid crystal panel 50 is adjacent to the inner side wall of the first mounting portion 22. Therefore, the structure of the middle frame can be simplified, and the assembly efficiency of the display screen can be improved.

In addition, at least one pair of opposite sides (two opposite sides) of the protective cover 40 is fixed to the first mounting portion 21, that is, the protective cover 40 may be fixedly connected to the first mounting portion 21 by one pair of opposite sides, or may be fixedly connected to the first mounting portion 21 by two pairs of opposite sides. At least one pair of opposite sides of the liquid crystal panel 50 is fixed to the second mounting portion 22, that is, the liquid crystal panel 50 may be fixedly connected to the second mounting portion 22 by one pair of opposite sides, or may be fixedly connected to the second mounting portion 22 by two pairs of opposite sides.

Referring to fig. 1, the first mounting portion 21 is provided with a rib 23 for limiting the position of the protective cover 40, and the rib 23 can prevent the protective cover 40 from shifting from the middle frame 20, thereby enhancing the structural stability.

The display screen provided by the embodiment of the utility model is provided with the step structure on the middle frame 20, the protective cover plate 40 and the liquid crystal panel 50 are respectively fixedly arranged on the upper step and the lower step of the step structure, the structure is simple and convenient to install, the upper protective cover plate 40 can limit the lower liquid crystal panel 50 longitudinally (namely, in the up-down direction), and the inner side of the first installation part 21 can limit the liquid crystal panel 50 transversely to prevent the liquid crystal panel 50 from moving; the middle frame 20 is provided with the convex rib 23 which can limit the protective cover plate 40 transversely (i.e. in the inner and outer directions) to prevent the protective cover plate 40 and the middle frame 20 from generating transverse position deviation without additionally arranging a limiting structure; the outer frame 30 presses against the outer surface of the protective cover 40, so as to longitudinally limit the protective cover 40, and further to stabilize the protective cover 40. The middle frame is simple in structure and good in stability, and is matched with the outer frame 30, so that the protective cover plate 40, the liquid crystal panel 50 and the back plate 10 are assembled more efficiently and quickly and are stable in structure, and material cost is saved to a certain extent.

Referring to fig. 1, the middle frame 20 further has an accommodating groove 24, the accommodating groove 24 is through to the bottom surface and the inner side surface of the middle frame 20, and an edge portion of the backlight module 60 is accommodated in the accommodating groove 24, so that the connection structure between the backlight module and the middle frame is more compact. Further, the upper wall of the receiving groove 24 may press the backlight module 60 against the back plate 10 during the installation of the middle frame 20 and the back plate 10, thereby simplifying the installation process of the backlight module 60.

In the embodiment of the present invention, the middle frame 20 may be two frames that are not connected, such as two opposite sides, or may be a polygonal frame or a curved frame that are connected end to form a closed loop. In one embodiment, the middle frame 20 is a set of opposite sides parallel to each other, each side is formed with the above-mentioned step structure, the opposite sides of the protective cover 40 are respectively fixed on the corresponding first mounting portions 21, and the opposite sides of the liquid crystal panel 50 are respectively fixed on the corresponding second mounting portions 22. In another embodiment, the middle frame 20 is a closed-loop frame formed by two sets of opposite sides, the four sides are formed with the above-mentioned step structure, the two sets of opposite sides of the protective cover 40 are respectively fixed on the corresponding first mounting portions 21, and the two sets of opposite sides of the liquid crystal panel 50 are respectively fixed on the corresponding second mounting portions 22.

In the embodiment of the present invention, please refer to fig. 1, the rib 23 is disposed at the edge of the first mounting portion 21 close to the outer frame 30. So set up, frame 30 can be hugged closely to the lateral wall of protruding muscle 23 for protruding muscle 23 can receive frame 30's horizontal supporting effect, prevents that protruding muscle 23 from producing lateral deformation, and additional strengthening's steadiness makes overall structure compacter, can also make the overlap area of protection apron 40 and frame 30 as far as possible big.

In the embodiment of the present invention, a continuous rib 23 may be provided on one middle frame 20, or a plurality of discontinuous ribs 23 may be provided. The rib 23 and the middle frame 20 may be integrally formed, or the rib 23 may be an independent structure, and may be fixed to the first mounting portion 21 of the middle frame 20 by welding or the like.

In the embodiment of the present invention, a spring structure (not shown) may be disposed between the ribs 23 and the side surface of the protective cover 40, and the protective cover 40 may be clamped between the ribs 23 disposed oppositely by the reaction force of the spring structure, so that the structural stability may be enhanced, and the protective cover 40 may be further prevented from moving laterally or falling off from the middle frame 20.

In the embodiment of the present invention, the height of the rib 23 is not greater than the thickness of the protective cover 40. With such an arrangement, the outer frame 30 can be directly pressed against the outer surface of the protective cover plate 40, so that the outer frame 30 can be pressed against the protective cover plate 40 and can play a certain protective role.

In the embodiment of the present invention, the height of the first mounting portion 21 is adapted to the thickness of the liquid crystal panel 50. When the liquid crystal panel 50 is mounted on the second mounting portion 22, the upper surface of the liquid crystal panel 50 may be flush with the upper surface of the first mounting portion 21, or may be slightly lower than the upper surface of the first mounting portion 21, so that the upper surface of the liquid crystal panel 50 and the lower surface of the protective cover 40 may be bonded by an adhesive material, and the liquid crystal panel 50 is further fixed to prevent the liquid crystal panel 50 from moving relatively. If the lower surface of the liquid crystal panel 50 is bonded to the second mounting portion 22 using an adhesive material, the height of the first mounting portion 21 is substantially equal to or slightly greater than the sum of the thickness of the liquid crystal panel 50 and the thickness of the adhesive layer 80.

In the embodiment of the present invention, the middle frame 20 has a quadrilateral structure, four sides of the middle frame 20 are each provided with a step structure, and each first mounting portion 21 is provided with a rib 23. The ribs 23 are arranged on the step structures of the quadrilateral frame, so that the protective cover plate 40, the liquid crystal panel 50 and the middle frame 20 can be more firmly installed and are not easy to fall off.

In the embodiment of the present invention, the middle frame 20 is an integrally formed structure, and the integrally formed structure has higher stability, so that the overall stability of the display screen structure can be enhanced, the assembly process of the product is simplified, and the processing cost is reduced.

In the embodiment of the present invention, the lower surface of the protective cover 40 is bonded to the upper surface of the first mounting portion 21, and the lower surface of the liquid crystal panel 50 is bonded to the upper surface of the second mounting portion 22. Carry out the connection between the subassembly through the glue material, can reduce the use of fixed subassemblies such as screw, simplify the equipment process, improve the packaging efficiency to reduce material cost and human cost.

Further, the side surface of the protective cover plate 40 is bonded with the inner side surface of the rib 23 through a glue material; the side surface of the liquid crystal panel 50 is bonded to the side surface of the first mounting portion 21 with a glue material. With this arrangement, the stability of the connection between the protective cover 40 and the liquid crystal panel 50 and the middle frame 20 can be further enhanced, and the protective cover 40 or the liquid crystal panel 50 can be prevented from falling off from the middle frame 20.

In the embodiment of the present invention, the lower surface of the protective cover 40 is bonded to the upper surface of the liquid crystal panel 50. Specifically, the protective cover plate 40 and the liquid crystal panel 50 can be bonded into a whole through a glue material, and then the integrated structure of the protective cover plate 40 and the liquid crystal panel 50 is bonded on the step structure of the middle frame 20 through the glue material, so that the product assembling process can be further simplified, the assembling efficiency is improved, and the production cost is reduced. The liquid crystal panel 50 may be bonded to the upper surface of the second attachment portion 22, and then the protective cover 40 may be bonded to the upper surfaces of the first attachment portion 21 and the liquid crystal panel 50 at the same time.

Specifically, referring to fig. 1, the lower surface of the protective cover 40 and the upper surface of the liquid crystal panel 50 may be bonded in a partial region, for example, the bonding region between the protective cover 40 and the liquid crystal panel 50 is in the region corresponding to the second mounting portion, so that the adhesive layer 80 may be prevented from affecting the visual effect. In addition, referring to fig. 2, the lower surface of the protective cover 40 and the upper surface of the liquid crystal panel 50 can be completely adhered by the whole adhesive material, so that the overall stability of the structure can be enhanced.

The glue material can be a two-liquid mixed hardening glue, namely AB glue, wherein the A component is the glue, the B component is the hardening agent, and the two components can be hardened after being mixed, and the A component is one of normal-temperature hardening glue. The A component is usually acrylic modified epoxy or epoxy resin or contains catalyst and other auxiliary agents, and the B component is usually modified amine or other hardening agent or contains catalyst and other auxiliary agents. The component A and the component B are mixed according to a certain proportion. The catalyst may control the cure time and other adjuvants may control properties (e.g., viscosity, stiffness, flexibility, adhesion, etc.).

In the embodiment of the utility model, referring to fig. 1, the backlight module 60 includes a reflective sheet 61, a diffusion plate 62 and an optical film 63, and the reflective sheet 61, the diffusion plate 62 and the optical film 63 are stacked on the back plate 10. The reflective sheet 61 is arranged on the bottommost layer, and when the reflective sheet 61 is installed, the reflective sheet 61 is attached to the back plate 10; the diffusion plate 62 is stacked above the reflection sheet 61; the optical film 63 is attached above the diffusion plate 62. During installation, the diffusion plate 62 and the optical film 63 which are attached together are embedded into the accommodating groove 24 of the middle frame 20, so that the structure is more compact, the assembly process is simplified, and the assembly efficiency is improved.

A light source (not shown) is typically disposed on the housing 10, and a diffuser plate 62 is disposed in the light exit path of the light source. The effective working area of the diffusion plate is separated from the light source by a preset distance to form a light mixing area. The diffusion plate 62 sufficiently diffuses incident light emitted from the light source, and has a good shielding effect on a lamp shadow, thereby achieving a softer and more uniform light source. The diffuser plate 62 is generally made of optical-grade resin material, and commonly used are thermoplastic resin, polycarbonate, acrylic, and the like.

The optical film 63 is attached above the diffuser plate 62, and generally includes a diffusion sheet, a prism sheet, and a reflection type polarization enhancement film, which are stacked. The diffusion sheet generally adopts PET (polyethylene terephthalate) or PC (polycarbonate) base materials, has a smooth incident surface and a rough emergent surface, and has the function of refracting, reflecting and scattering light rays emitted from the emergent surface of the diffusion plate for multiple times, so that the backlight is more uniform. The prism sheet is a light condensing device, and concentrates dispersed light to exit within a certain angle range by using the law of total reflection and refraction, thereby improving the brightness within the exit range. The reflective polarizing brightness enhancement film may also enhance the brightness of the backlight.

A reflective sheet 61 is further disposed between the light source and the bottom plate of the back plate 10, and the material of the reflective sheet 61 is generally a PET (polyethylene terephthalate) film on which a high-reflectivity metal film is plated, or a combination of upper and lower PET (polyethylene terephthalate) films including a core layer (polymer resin having high reflectivity). The main function of the reflector 61 is to reflect light leaking from the diffuser 62 back to improve the utilization of the light source.

In the embodiment of the present invention, referring to fig. 1, the outer frame 30 is a quadrilateral structure, the outer frame 30 is surrounded on the outer side of the middle frame 20, the bottom of the outer frame 30 is provided with a groove 34, the edge of the back plate 10 is tilted to one side to form a positioning folding edge 11, the positioning folding edge 11 extends into the groove 34 of the outer frame 30, and the connection between the outer frame 30 and the back plate 10 is stable and has a flat and beautiful appearance. Further, the ends of the middle frame 20 and the outer frame 30 close to the back plate 10 are respectively provided with a mounting hole, the back plate 10 is provided with a through hole corresponding to the mounting hole, and the middle frame 20 and the outer frame 30 respectively pass through the mounting hole and the through hole through the connecting piece 90 to be fixedly connected with the back plate 10. The connecting member 90 may be a screw, a rivet, or the like.

Referring to fig. 1, the outer frame 30 includes a connecting portion 31 and a bridging portion 32, one end of the connecting portion 31 is fixedly connected to the back plate 10, the other end of the connecting portion 31 is provided with a bridging portion 32 vertically connected to the connecting portion, and the bridging portion 32 is bridged and pressed against the edge of the protective cover 40.

Further, a buffer layer may be disposed between the overlapping portion 32 and the protective cover 40 to prevent the surface of the protective cover 40 from being damaged when the overlapping portion 32 contacts the protective cover 40. In addition, the cushioning layer may also cause the bridge portion 32 to press against the surface of the protective cover 40, thereby further enhancing structural stability. The cushioning layer may be rubber, foam, or the like.

Further, this overlap joint portion 32 and protection apron 40 between can also bond through the glue material, so set up not only can play the effect of buffering, can also make the structure more firm.

Referring to fig. 1, a receiving groove 33 is formed inside the outer frame 30, and the receiving groove 33 penetrates the overlapping portion 32 to form an opening (not shown). The outer frame 30 is provided with an infrared touch assembly 70, the infrared touch assembly 70 includes an infrared touch panel 71 disposed inside the accommodating groove 33 and an infrared filter strip 72 disposed at the opening, an infrared light source (not shown in the figure) is disposed on the infrared touch panel 71, and the infrared filter strip 72 is located on a light emitting path of the infrared light source.

The infrared touch technology is a technology for detecting and positioning a touch gesture of a user by using infrared matrixes densely distributed in two directions perpendicular to each other. After the outer frame 30 of the technology is enclosed in the middle frame 20, the infrared touch components 70 in each frame of the outer frame 30 are located on four sides of the liquid crystal panel 50, wherein the infrared touch components 70 on the left and right sides are a group, the infrared touch components 70 on the upper and lower sides are a group, two infrared touch components 70 in each group include a receiving infrared touch component and an emitting infrared touch component, the infrared rays emitted by the emitting infrared touch components are received by the receiving infrared touch components, and therefore, four infrared touch components 70 in the two groups form a horizontally and vertically crossed infrared matrix when in work. When a finger touches the protective layer, two infrared rays in the horizontal direction and the vertical direction passing through the position can be blocked, so that the coordinate position of the touch point on the liquid crystal panel 50 can be judged, and the infrared touch function is further realized.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A display screen, its characterized in that:

the backlight module comprises a back plate (10), a middle frame (20), an outer frame (30), a protective cover plate (40), a liquid crystal panel (50) and a backlight module (60), wherein the middle frame (20) and the backlight module (60) are fixed on the back plate (10), and the outer frame (30) is arranged around the outer side of the middle frame (20) and connected with the back plate (10);

the middle frame (20) comprises a first mounting part (21) and a second mounting part (22), the first mounting part (21) and the second mounting part (22) form a step structure, and the height of the first mounting part (21) is greater than that of the second mounting part (22);

at least one group of opposite sides of the protective cover plate (40) is fixed on the first mounting part (21);

at least one pair of opposite sides of the liquid crystal panel (50) is fixed on the second mounting part (22);

the first mounting part (21) is provided with a convex rib (23) for limiting the protective cover plate (40);

the outer frame (30) is pressed against the outer surface of the protective cover plate (40).

2. The display screen according to claim 1, wherein the rib (23) is provided at a position of the first mounting portion (21) near an edge of the outer frame (30).

3. A display screen according to claim 2, characterised in that the height of the ribs (23) is no greater than the thickness of the protective cover (40).

4. A display screen according to claim 1, characterised in that the height of the first mounting portion (21) is adapted to the thickness of the liquid crystal panel (50).

5. The display screen according to claim 1, wherein the middle frame (20) is of a quadrilateral structure, four sides of the middle frame (20) are provided with the step structure, and each first mounting portion (21) is provided with the convex rib (23).

6. A display screen according to claim 1, characterised in that the centre frame (20) is of one-piece construction.

7. A display screen according to claim 1, characterised in that the protective cover (40) is glued to the first mounting portion (21); the liquid crystal panel (50) is bonded to the second mounting portion (22).

8. A display screen according to claim 7, characterised in that the lower surface of the protective cover (40) is bonded to the upper surface of the liquid crystal panel (50), the bonding area between the protective cover (40) and the liquid crystal panel (50) being in the area corresponding to the second mounting portion (22) in the direction perpendicular to the liquid crystal panel (50).

9. A screen according to any one of claims 1 to 8, wherein the middle frame (20) is provided with a receiving groove (24), the receiving groove (24) is communicated with the bottom surface and the inner side surface of the middle frame (20), and the backlight module (60) is partially received in the receiving groove (24).

10. A display screen as recited in claim 9, wherein the backlight module (60) comprises a reflective sheet (61), a diffuser plate (62) and an optical film (63), the reflective sheet (61), the diffuser plate (62) and the optical film (63) are stacked on the back plate (10), and edges of the reflective sheet (61), the diffuser plate (62) and the optical film (63) are embedded in the accommodating groove (24).