CN218995840U - Backlight module and display device - Google Patents

Abstract

The utility model relates to the technical field of display equipment, and discloses a backlight module and a display device, wherein the backlight module comprises a back plate assembly, a fixing frame, a diffusion plate and a membrane structure, the back plate assembly comprises a back plate, the fixing frame comprises a main body part and a protruding part which are integrally constructed, the main body part is fixedly connected with the circumferential edge of the back plate, the protruding part is positioned on one side of the main body facing the interior of the back plate, and the protruding part is positioned on the front side of the back plate; the diffusion plate and the diaphragm structure are sequentially arranged on the front surface of the back plate in a lamination mode along the first direction, and the diffusion plate and the diaphragm structure are arranged on the protruding part; the fixing frame can be directly integrally formed, split machining and assembly are not needed, the production and assembly processes of the backlight module are simplified, the assembly efficiency of the backlight module is improved, and the production input cost of the backlight module is reduced.

Description

Backlight module and display device

Technical Field

The utility model relates to the technical field of display equipment, in particular to a backlight module and a display device.

Background

This section provides merely background information related to the utility model, which is not necessarily prior art.

The backlight module is one of the key components of the liquid crystal display. The backlight module comprises a back plate assembly, a diffusion plate, a membrane structure and the like which are sequentially stacked, and the back plate assembly, the diffusion plate and the membrane structure are assembled and fixed at the peripheral edge for ensuring good display effect. At present, the back plate assembly, the diffusion plate and the membrane structure are fixed through a plurality of members such as a section frame and a rubber frame, the section frame and the rubber frame are required to be produced and assembled respectively, the operation process is complex, and the production cost is high.

Disclosure of Invention

The utility model aims to at least solve the problems of complex assembly process and production cost of the backlight module. The aim is achieved by the following technical scheme:

the first aspect of the present utility model provides a backlight module, including:

a backplate assembly comprising a backplate;

the fixing frame comprises a main body part and a protruding part which are integrally constructed, wherein the main body part is fixedly connected with the circumferential edge of the backboard, the protruding part is positioned on one side of the main body part facing the interior of the backboard, and the protruding part is positioned on the front side of the backboard;

the diffusion plate and the diaphragm structure are sequentially stacked and arranged on the front surface of the back plate along the first direction, and the diffusion plate and the diaphragm structure are both installed on the protruding portion.

According to the backlight module, the main body part and the protruding part of the fixed frame are of an integrated structure, the fixed frame can be directly and integrally formed, split processing and assembly are not needed, the production and assembly processes of the backlight module are simplified, and the assembly efficiency of the backlight module is improved; and the fixed frame can be machined by adopting one die or one set of machining tool, so that a plurality of sets of dies or a plurality of sets of machining tools are not required to be arranged corresponding to the rubber frame, the profile frame and the like in comparison with the prior art, and the production input cost of the backlight module is reduced.

In addition, according to the utility model, the following additional technical features can be provided:

in some embodiments of the present utility model, the protrusion is disposed at a middle portion of the body portion in a first direction, the protrusion has a first mounting surface perpendicular to the first direction, and the diffusion plate is disposed on the first mounting surface.

In some embodiments of the utility model, a first bumper is disposed between the first mounting surface and the diffuser plate, the first bumper securing the diffuser plate to the first mounting surface.

In some embodiments of the utility model, the first cushioning member is a foam.

In some embodiments of the present utility model, the protruding portion further has a mounting groove, a notch of the mounting groove faces the inside of the back plate, and the diaphragm structure is inserted into the mounting groove.

In some embodiments of the present utility model, a first mating structure is disposed in the mounting groove, and a second mating structure is disposed on the membrane structure, and the second mating structure is inserted in the mounting groove and is mated and fixed with the first mating structure.

In some embodiments of the utility model, the diffuser plate is a glass diffuser plate.

A second aspect of the present utility model proposes a display device comprising:

the backlight module provided by the first aspect of the utility model;

the liquid crystal display screen is arranged on one side, far away from the diffusion plate, of the diaphragm structure in a stacked mode, and the liquid crystal display screen is arranged on the protruding portion.

The display device provided by the utility model comprises the backlight module provided by the first aspect of the utility model, and at least has the beneficial effects of the backlight module provided by the utility model.

In some embodiments of the utility model, the display device further includes a touch pad, the touch pad is disposed on a side of the liquid crystal display facing away from the membrane structure, and the touch pad is mounted on the main body.

In some embodiments of the present utility model, a second buffer member is disposed between the protrusion and the liquid crystal display;

and/or

A third buffer piece is arranged between the touch control plate and the main body part, and the touch control plate is fixed on the main body part by the third buffer piece.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic view showing a part of a cross section of a display device according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an exploded view of fig. 1.

The reference numerals are as follows:

100. a back plate; 101. a bottom surface portion; 102. a connection section; 103. a mounting section; 104. a side surface portion; 105. a plug-in part; 110. a reflection sheet;

200. a fixed frame; 210. a main body portion; 211. a first portion; 212. a second portion; 213. a third mounting surface; 214. a fourth mounting surface; 215. a slot; 220. a protruding portion; 221. a first mounting surface; 222. a second mounting surface; 223. a mounting groove;

300. a diffusion plate; 310. a first buffer member;

400. a diaphragm structure;

500. a liquid crystal display; 510. a second buffer member;

600. a touch panel; 610. a third buffer member;

A. a first direction.

Detailed Description

Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

As shown in fig. 1 to 3, according to an embodiment of the present utility model, a backlight module is provided and is applied to a display device. The backlight module includes a back plate assembly, a fixing frame 200, a diffusion plate 300 and a membrane structure 400. The back plate assembly includes a back plate 100, the fixing frame 200 includes a body portion 210 and a protrusion portion 220, the body portion 210 is fixedly connected with a circumferential edge of the back plate 100, the protrusion portion 220 is located at a side of the body portion 210 facing the back plate 100, and the protrusion portion 220 is located at a front side of the back plate 100. The diffusion plate 300 and the membrane structure 400 are sequentially stacked on the front surface of the back plate 100 along the first direction a, and the diffusion plate 300 and the membrane structure 400 are mounted on the protrusion 220.

Wherein the back plate 100 is a cavity structure of the backlight optical element, and forms the appearance of the product. The back panel assembly further includes a backlight source (e.g., a light emitting diode), a lens, a reflective sheet 110, etc. disposed on the back panel 100, wherein the reflective sheet 110 is used for reflecting light inside the optical cavity, so as to improve the light utilization rate. Referring to fig. 1 to 3, in the present embodiment, the back plate 100 is a trough plate, the bottom wall of the back plate 100 is a bottom surface portion 101, the bottom surface portion 101 is provided in a substantially planar plate shape, and the bottom surface portion 101 is used for mounting a light source, a lens, and the like. The side of the back plate 100 facing outwards, i.e. the side of the back plate 100 on which the lenses are arranged (i.e. the side of the back plate 100 forming the cavity), is generally defined as front side. The side wall of the back plate 100 forms a side surface portion 104, and the side surface portion 104 is surrounded by the circumferential edge of the bottom surface portion 101 and is located on the front side of the bottom surface portion 101. The side surface portion 104 includes a transition section, one end of which (the lower end shown with reference to fig. 1 to 3) is connected to the circumferential edge of the bottom surface portion 101, and an installation section 103, which is provided obliquely outward with respect to the bottom surface portion 101; the mounting section 103 is connected to one end of the transition Duan Yuan away from the bottom surface portion 101 (refer to the upper end shown in fig. 1 and 2), and the mounting section 103 is disposed parallel to the bottom surface portion 101 and extends outward away from the center of the bottom surface portion 101.

Here, the bottom portion 101 and the side portion 104 are defined for convenience of description, and the back plate 100 is generally a unitary structure, that is, the bottom portion 101 and the side portion 104 are integrally formed, for example, may be injection molded. The overall shape of the back plate 100 is substantially identical to the screen shape of the display device, for example, the screen of a television and the screen of a computer are generally square, and accordingly, the overall shape of the back plate 100 corresponding to the screen of a television and the screen of a computer is square, and only a part of the cross-sectional view of the backlight module of the present embodiment is shown in fig. 1 and 3. The center of the bottom surface portion 101, that is, the position where the center line of the back plate 100 is located, passes through the center of the plate surface of the back plate 100, and is parallel to the end surface line (broken line) shown in fig. 1 and 3, and the center is located on the right side of the current figure in fig. 1 and 3. In the present embodiment, the circumferential edge of the back plate 100 can be understood with reference to the end of the mounting section 103 remote from the bottom surface portion 101.

The first direction a is a direction from the back surface of the back plate 100 toward the front surface of the back plate 100, specifically, in the diffusion plate 300 and the membrane structure 400, the diffusion plate 300 is disposed close to the back plate 100, that is, the back plate 100, the diffusion plate 300 and the membrane structure 400 are sequentially disposed. The diffusion plate 300 and the membrane structure 400 are shaped in conformity with the shape of the back plate 100, for example, the back plate 100 having a square overall shape, and the diffusion plate 300 and the membrane structure 400 and the liquid crystal display 500 are also arranged in a square shape. The diffusion plate 300 and the membrane structure 400 can completely cover the main body 210 of the back plate 100, and edges of the diffusion plate and the membrane structure can be lapped on the mounting section 103, so that the backlight module performance is ensured, and meanwhile, the components are conveniently fixed through the fixing frame 200.

Wherein the reflective sheet 110 of the backlight assembly completely covers the main body portion 210 and the connection section 102 of the back plate 100 and partially covers the mounting section 103.

The diffusion plate 300 can refract and diffuse the backlight light, and has a screen concealing effect, i.e., a filtering effect.

The film structure 400 can refract and concentrate light to the backlight source, so that the luminous efficiency is improved. The film structure 400 is also called a brightness enhancement film, a prism sheet, a condensing sheet, or the like, and uses a special prism structure of the film structure 400 to concentrate light rays in all directions to a central viewing angle by optical principles such as refraction, total reflection, light accumulation, and the like, thereby improving the brightness of a panel of the display screen.

The fixing frame 200 belongs to an outer appearance of the backlight module, namely a frame of the backlight module, and is used for fixing the back plate 100, the diffusion plate 300 and the membrane structure 400. The fixing frame 200 is generally a ring-shaped frame, for example, corresponding to a square display device, and the fixing frame 200 includes four frames connected end to end in sequence, the four frames constituting a square frame. At least two opposite sides of the ring-shaped fixing frame 200 are provided with the structure form of the fixing frame 200 according to the embodiment, and, taking a square frame as an example, at least two opposite side frames are provided with the structure form of the fixing frame according to the embodiment, so that the fixing backing plate 100, the diffusion plate 300, the membrane structure 400, and the like are fixed at least from opposite sides.

According to the backlight module of the embodiment, the main body 210 and the protruding portion 220 of the fixing frame 200 are integrally formed, so that the fixing frame 200 can be directly integrally formed without separate processing and assembly, thereby simplifying the production and assembly processes of the backlight module and improving the assembly efficiency of the backlight module; and the fixed frame 200 can be processed by adopting one die or one set of processing tool, so that a plurality of sets of dies or a plurality of sets of processing tools are not required to be arranged corresponding to the rubber frame, the profile frame and the like in comparison with the prior art, and the production input cost of the backlight module is reduced.

In one implementation, the fixing frame 200 is an aluminum profile frame. The aluminum profile frame can be formed by injection molding or extrusion molding, so that the main body part 210 and the protruding part 220 are formed, and the processing is convenient.

Referring to fig. 1 to 3, in the present embodiment, the body portion 210 includes a first portion 211 and a second portion 212 integrally constructed, the first portion 211 being located at a side of the second portion 212 remote from the center of the back plate 100, the second portion 212 being connected between the first portion 211 and the protrusion 220. The second portion 212 forms an inwardly tapered step with respect to the first portion 211, and the second portion 212 has a third mounting surface 213 and a fourth mounting surface 214 disposed sequentially opposite and spaced apart along the first direction a, the third mounting surface 213 and the fourth mounting surface 214 being disposed parallel to the bottom surface portion 101 of the back plate 100. The back plate 100 is connected to the third mounting surface 213, and the fourth mounting surface is used for mounting the touch pad 600 of the display device.

Specifically, in one implementation manner, the slot 215 is disposed on the third mounting surface 213, and the edge of the connection section 102 of the back plate 100 is folded with the plugging portion 105, and the plugging portion 105 is plugged into the slot 215, so that the back plate 100 is fixed on the fixing frame 200. The touch pad 600 is adhered to the fourth mounting surface 214.

Further, the first portion 211 and the plug portion 105 may further cooperate with screws to lock the back plate 100 to the fixing frame 200.

It will be appreciated that, referring to fig. 1 to 3, the second portion 212 forms an inwardly contracted step with respect to the first portion 211, so that a rear end (a lower end shown in fig. 1 to 3) of the second portion 212 forms an edge stopper of the back plate 100, and a front end (an upper end shown in fig. 1 to 3) of the second portion 212 forms an edge stopper of the touch pad 600, so as to position mounting positions of the back plate 100 and the touch pad 600, and define the back plate 100 and the touch pad 600 inside the fixing frame 200 (specifically, inside the first portion 211).

Further, a third buffer member 610 is disposed between the touch pad 600 and the fourth mounting surface 214, and the third buffer member 610 fixes the touch pad 600 on the main body 210. The third buffer member 610 may be a foam adhesive, and the foam adhesive is a double sided adhesive, which can fixedly connect the touch pad 600 with the main body 210 of the fixing frame 200 under the buffering effect.

Referring to fig. 1 to 3, in one implementation, the protruding portion 220 is disposed at a middle portion of the main body portion 210 in the first direction a, the protruding portion 220 has a first mounting surface 221 and a second mounting surface 222, and the first mounting surface 221 and the second mounting surface 222 are sequentially spaced apart along the first direction a; the diffusion plate 300 is disposed on the first mounting surface 221, and the second mounting surface 222 is used for disposing the liquid crystal display 500 of the display device.

The protrusion 220 is disposed at the middle of the body 210 in the first direction a may be understood as a step formed by the protrusion 220 and the body 210 shrinking inwardly. The first mounting surface 221 and the second mounting surface 222 are two side surfaces of the protruding portion 220 that are disposed at opposite intervals, and the first mounting surface 221 and the second mounting surface 222 are disposed parallel to the bottom surface portion 101 of the back plate 100.

It will be appreciated that the second portion 212 of the main body 210 forms a circumferential stop portion of the lcd 500 near one end (the upper end shown in fig. 1-3) of the fourth mounting surface 214, which limits the lcd 500 to the inside of the second portion 212 of the main body 210. The second portion 212 of the main body 210 forms a circumferential limit portion of the diffuser plate 300 near one end (lower end shown in fig. 1 to 3) of the third mounting surface 213, defining the diffuser plate 300 inside the second portion 212 of the main body 210.

Further, the diffusion plate 300 of the present embodiment may be adhered to the first mounting surface 221 by means of adhesion.

A first buffer member 310 may be disposed between the first mounting surface 221 and the diffusion plate 300, and the first buffer member 310 fixes the diffusion plate 300 to the first mounting surface 221. Specifically, the first buffer member 310 may be a foam rubber, and the foam rubber is specifically a double-sided adhesive, which can achieve adhesion between the diffusion plate 300 and the first mounting surface 221 of the protrusion 220 under the buffer effect.

In order to facilitate the installation of the membrane structure 400, referring to fig. 1 to 3, the protrusion 220 further has an installation groove 223, the installation groove 223 is disposed between the first installation surface 221 and the second installation surface 222, and a notch of the installation groove 223 faces the inside of the back plate 100; the membrane structure 400 is inserted into the mounting groove 223.

The mounting groove 223 may be processed by a milling process, and the mounting groove 223 may be set at a partial position in the circumferential direction of the protrusion 220. Typically, the edge of the diaphragm structure 400 is provided with a fixed position, and the mounting groove 223 only needs to be provided opposite to the fixed position of the diaphragm structure 400. In this embodiment, the membrane structure 400 is square, and the membrane structure 400 is fixed by three sides.

In the prior art, the diaphragm structure 400 needs to be fixed by the back plate 100, specifically, a bending structure or a riveting column is formed on the front surface of the back plate 100, and a mounting hole is formed on the diaphragm structure 400, and the bending structure or the riveting column penetrates through the mounting hole to fix the diaphragm structure 400. Because the diffusion plate 300 is further disposed between the back plate 100 and the membrane structure 400, it is necessary to provide an uneven structure or an avoidance hole for the bending structure or the rivet column to pass through on the diffusion plate 300, and when the diffusion plate 300 is processed in a numerical control manner, it is also necessary to provide a CNC (numerical control) avoidance position, which is high in cost and poor in processing convenience.

In this embodiment, the diaphragm structure 400 is built in the protruding portion 220 of the fixing frame 200 through the mounting groove 223, and the back plate 100 does not need to be provided with a bending structure or a riveting column, and the diffusion plate 300 does not need to be provided with an uneven structure or an avoidance hole, so that the processing is convenient, and the processing cost is low.

Further, in one implementation, a first mating structure (not shown) is further disposed in the mounting groove 223, and a second mating structure (not shown) is disposed on the membrane structure 400, where the second mating structure is inserted into the mounting groove 223 and is mated and fixed with the first mating structure.

The first mating structure may be a hook structure and the second mating structure may be a tab provided on the diaphragm structure 400.

Further, the diffusion plate 300 of the present embodiment may be a glass diffusion plate.

In the prior art, the diffusion plate 300 is mostly plastic, and the plastic diffusion plate is softer, so that a corresponding bracket is usually required to be arranged on the bottom portion 101 of the back plate 100 to assist in supporting the middle portion of the diffusion plate 300, so as to avoid the diffusion plate 300 from falling down.

In this embodiment, by using the glass diffusion plate, the bracket for supporting the diffusion plate 300 can be omitted, so as to avoid bracket shadows or lamp shadows caused by the backward tilting of the whole machine or the structural deformation of the back plate 100. And the glass diffusion plate is fixed by foam rubber, so that the concave-convex special-shaped structure corresponding to the rivet column structure avoidance design of the back plate 100 can be prevented from being arranged on the diffusion plate 300, and the processing cost is reduced.

In summary, the backlight module of the embodiment eliminates the prior art glue frame design, and utilizes the profile frame structure, i.e. the fixing frame 200 is newly added with the step-shaped protruding portion 220 to replace the glue frame, and the fixing frame 200 forms the carrier for attaching the foam glue, so that the glue frame mold investment and the assembly of the production line process can be saved, the structural design scheme is simplified, and the cost is reduced; the protruding portion 220 may also serve as an auxiliary material bearing surface; the membrane structure 400 is arranged in the protruding part 220, and three sides of the membrane structure are provided with hanging lugs for fixing the membrane by using a hook structure, so that the diffusion plate 300 can be prevented from being designed into a concave-convex structure; the glass diffusion plate is designed, the structural strength is high, the deformation is small, the bracket shadow or the lamp shadow caused by the falling of the traditional plastic diffusion plate can be avoided, the backlight diffusion bracket design can be canceled, the glass thermal expansion is small, the foam rubber is used for fixation, and the defect caused by vibration can be reduced.

The present embodiment also provides a display device, including the backlight module provided in the present embodiment, and the liquid crystal display 500. The liquid crystal display 500 is stacked on a side of the membrane structure 400 away from the diffusion plate 300, that is, the diffusion plate 300, the membrane structure 400 and the liquid crystal display 500 are sequentially stacked on the front surface of the back plate 100 along the first direction, and the liquid crystal display 500 is also mounted on the protruding portion 220.

The display device may be a computer display screen, a television display screen, or the like. Each display device may include one or more backlight modules. The liquid crystal display 500 is typically a liquid crystal glass (i.e., liquid crystal OC) that is used for backlight light transmission and received picture signal processing display.

The shape of the liquid crystal display 500 is identical to the shape of the back plate 100 and the appearance of the display device, for example, the back plate 100 having a square overall shape, and the diffusion plate 300 and the membrane structure 400 and the liquid crystal display 500 are also arranged to have a square overall shape. The liquid crystal display 500 can completely cover the main body 210 of the back plate 100, and the edges can extend to the upper position corresponding to the mounting section 103, so that the liquid crystal display 500 can be conveniently fixed through the fixing frame 200 while the performance of the backlight module is ensured.

In the present embodiment, the liquid crystal display 500 is mounted on the second mounting surface 222 of the protrusion 220, and the second mounting surface 222 and the first mounting surface 221 are two side surfaces of the protrusion 220 opposite in the first direction.

It should be noted that, the distance between the fourth mounting surface 214 and the second mounting surface 222 along the first direction a is not smaller than the thickness of the lcd 500 along the first direction a, so as to facilitate the mounting and limiting of the lcd 500. The lcd 500 of this embodiment may be pressed against the second mounting surface 222 by the touch pad 600. The distance between the third mounting surface 213 and the first mounting surface 221 along the first direction a should be sufficient for mounting the diffusion plate 300 and the reflection sheet 110, that is, as shown with reference to fig. 2, the edges of the diffusion plate 300 and the reflection sheet 110 are disposed between the first mounting surface 221 and the connection section 102.

Optionally, a second buffer 510 is disposed between the second mounting surface 222 and the lcd 500. The second buffer 510 may be foam. The foam surface is capable of carrying and cushioning the protective liquid crystal display 500, i.e., liquid crystal OC.

Further, the display device of the present embodiment further includes a touch pad 600, where the touch pad 600 is stacked on a side of the liquid crystal display 500 facing away from the membrane structure 400, and the touch pad 600 is mounted on the main body 210.

The touch pad 600 is also called a "touch screen" or "touch panel", and is an inductive liquid crystal display device capable of receiving input signals such as contacts, and when the touch pad 600 contacts a graphic button, the haptic feedback system on the screen can drive various connecting devices according to a preprogrammed program, and can be used to replace a mechanical button panel, and to produce vivid audio/video effects by using a liquid crystal display. Specifically, the touch pad 600 may be a capacitive screen, and the capacitive screen may implement a writing function through a capacitive touch technology, and glass in the capacitive screen may be tempered glass.

In the present embodiment, the touch pad 600 is mounted on the fourth mounting surface 214.

The display device of the embodiment cancels the glue frame design in the prior art, utilizes the profile frame structure, namely the fixed frame 200 is newly added with the step-shaped protruding part 220 to replace the glue frame, and the fixed frame 200 forms a carrier for pasting foam rubber, so that the input of a glue frame mould and the assembly of production line processes can be saved, the structural design scheme is simplified, and the cost is reduced; the protruding portion 220 may also serve as an auxiliary material bearing surface; the membrane structure 400 is arranged in the protruding part 220, and three sides of the membrane structure are provided with hanging lugs for fixing the membrane by using a hook structure, so that the diffusion plate 300 can be prevented from being designed into a concave-convex structure; the glass diffusion plate is designed, the structural strength is high, the deformation is small, the bracket shadow or the lamp shadow caused by the falling of the traditional plastic diffusion plate can be avoided, the backlight diffusion bracket design can be canceled, the glass thermal expansion is small, the foam rubber is used for fixation, and the defect caused by vibration can be reduced. And the liquid crystal display 500, the touch panel 600 and the back plate assembly can be fixed through the fixing frame 200, and the liquid crystal display is convenient to operate and simple in structure.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A backlight module, comprising:

a backplate assembly comprising a backplate;

the fixing frame comprises a main body part and a protruding part which are integrally constructed, wherein the main body part is fixedly connected with the circumferential edge of the backboard, the protruding part is positioned on one side of the main body part facing the interior of the backboard, and the protruding part is positioned on the front side of the backboard;

the diffusion plate and the diaphragm structure are sequentially stacked and arranged on the front surface of the back plate along the first direction, and the diffusion plate and the diaphragm structure are both installed on the protruding portion.

2. The backlight module according to claim 1, wherein the protruding portion is disposed in a middle portion of the main body portion in a first direction, the protruding portion has a first mounting surface perpendicular to the first direction, and the diffusion plate is disposed on the first mounting surface.

3. A backlight module according to claim 2, wherein a first buffer member is provided between the first mounting surface and the diffusion plate, the first buffer member fixing the diffusion plate to the first mounting surface.

4. A backlight module according to claim 3, wherein the first buffer member is a foam.

5. A backlight module according to claim 2, wherein the protrusion further has a mounting groove, a notch of the mounting groove faces the interior of the back plate, and the diaphragm structure is inserted into the mounting groove.

6. A backlight module according to claim 5, wherein a first mating structure is disposed in the mounting groove, and a second mating structure is disposed on the membrane structure, and the second mating structure is inserted into the mounting groove and is mated and fixed with the first mating structure.

7. A backlight module according to any one of claims 1-6, wherein the diffuser plate is a glass diffuser plate.

8. A display device, comprising:

the backlight module of any one of claims 1-7;

the liquid crystal display screen is arranged on one side, far away from the diffusion plate, of the diaphragm structure in a stacked mode, and the liquid crystal display screen is arranged on the protruding portion.

9. The display device of claim 8, further comprising a touch pad disposed on a side of the liquid crystal display facing away from the membrane structure, the touch pad being mounted to the body portion.

10. The display device according to claim 9, wherein a second buffer member is provided between the projection and the liquid crystal display;

and/or

A third buffer piece is arranged between the touch control plate and the main body part, and the touch control plate is fixed on the main body part by the third buffer piece.

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