CN114089558A - Backlight module and display device - Google Patents

Abstract

The application belongs to the technical field of show, concretely relates to backlight unit and display device, backlight unit includes: a back plate comprising a bottom plate; an optical film layer, an edge of the optical film layer supported on the base plate; the limiting frame comprises a first limiting part, and the first limiting part is positioned on one side of the optical film layer, which is far away from the bottom plate, and is abutted against the edge of the optical film layer; the elastic buffer part is at least partially arranged between the edge of the optical film layer and the bottom plate and/or between the edge of the optical film layer and the first limiting part; the display device comprises a display panel and a backlight module; the display panel is arranged on the light emitting side of the backlight module; an elastic supporting force is provided for the diffusion plate through the elastic buffer piece, so that the optical film is clamped between the elastic buffer piece and the limiting frame, the problems that the optical film diaphragm is wrinkled and loosened due to the influence of gravity are avoided, and the display effect is improved.

Description

Backlight module and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a backlight module and a display device.

Background

Currently, the commonly used backlight modules include a side-in type backlight module and a direct type backlight module. Set up optics rete homogenization light among the straight following formula backlight unit usually, but optics rete, diffuser plate receive the influence of self gravity easily, lead to the fixed condition that becomes flexible appearing of its edge easily to arouse easily that take place not hard up and warp's problem between self layer in optics rete, the diffuser plate, make backlight unit's optical characteristic variation, and then make the display effect variation.

Disclosure of Invention

An object of the application is to provide a backlight unit and display device, aim at solving in the backlight unit because of the easy emergence of optics rete is not hard up, warpage and then leads to the problem that the display effect is bad.

The application provides a backlight module, including:

a back plate comprising a bottom plate;

an optical film layer, an edge of the optical film layer supported on the base plate;

the limiting frame comprises a first limiting part, and the first limiting part is positioned on one side of the optical film layer, which is far away from the bottom plate, and is abutted against the edge of the optical film layer;

and at least part of the elastic buffer piece is arranged between the edge of the optical film layer and the bottom plate and/or between the edge of the optical film layer and the first limiting part.

In an exemplary embodiment of the present application, the elastic buffer includes an elastic main body portion disposed between the edge of the optical film layer and the bottom plate, the elastic main body portion includes an upper adsorption groove and/or a lower adsorption groove, an opening of the upper adsorption groove faces the optical film layer, and an opening of the lower adsorption groove faces the bottom plate.

In an exemplary embodiment of the present application, in a direction from the bottom plate to the elastic main body portion, a diameter of a lower portion of the elastic main body portion to a middle portion of the elastic main body portion is gradually decreased, and a diameter of the middle portion of the elastic main body portion to an upper portion of the elastic main body portion is gradually increased.

In an exemplary embodiment of the present application, the elastic buffer is a black rubber structure.

In an exemplary embodiment of the present application, the back plate further includes a side plate, the side plate is connected to the bottom plate and encloses a mounting cavity, and the optical film layer is located in the mounting cavity;

the elastic buffer piece further comprises an elastic extension part connected with the elastic main body part, and at least part of the elastic extension part is located between the side plate and the optical film layer.

In an exemplary embodiment of the present application, a through hole is formed at a junction of the elastic extension portion and the elastic body portion, and the through hole is located between the base plate and the optical film layer.

In an exemplary embodiment of the present application, a light shielding layer is disposed on a side of the elastic buffer close to the optical film layer.

In an exemplary embodiment of the present application, the back plate further includes a side plate, the side plate is connected to the bottom plate and encloses a mounting cavity, and the optical film layer is located in the mounting cavity;

the limiting frame further comprises a second limiting part and a limiting connecting part connected with the first limiting part and the second limiting part, and the second limiting part is in contact with one side of the side plate, which is far away from the optical film layer.

In an exemplary embodiment of the present application, the optical film layer includes a diffusion film, a brightness enhancement film, and a diffusion plate sequentially arranged in a vertical direction from the first position-limiting portion to the base plate; and/or

The bottom plate is close to one side of optics rete is provided with the reflection stratum, just the reflection stratum is close to one side of optics rete is provided with the light source, the light source with have the clearance between the optics rete.

The application also provides a display device, which comprises a display panel and any one of the backlight module and the display panel, wherein the display panel is arranged on the light-emitting side of the backlight module.

The scheme of the application has the following beneficial effects:

through set up elastic buffer between the edge at bottom plate and diffuser plate, usable elastic buffer applys an elastic force and the holding power towards the diffuser plate to can make optics rete and diffuser plate press from both sides tightly between elastic buffer and spacing frame, in order to avoid or alleviate because receiving self gravity or external force influence and lead to appearing not hard up the condition between optics rete self, promptly: the fixing stability between the edge of the optical film layer and the first limiting part and the bottom plate is ensured, so that the problems of looseness, membrane buckling deformation and the like between the optical film layer and the first limiting part can be relieved or avoided; moreover, the elastic buffer parts arranged on the two side edges of the diffusion plate are also used for supporting the diffusion plate; and the elastic buffer piece is arranged between the diffusion plate and the bottom plate, so that a certain buffer effect can be achieved on the edge of the diffusion plate, and the problems of damage of the diffusion plate and the like are avoided.

In addition, this application sets up elastic buffer through the position department that corresponds with the fixed edge of optics rete, compare in the scheme that sets up the support frame in order to overcome its self gravity influence in the position that corresponds with the middle zone of optics rete, when overcoming optics rete self gravity influence and supporting the diffuser plate, still can avoid appearing sheltering from the condition to the light that partial light source sent to can solve the problem that produces the shadow on the display panel, and then promote display device's display effect.

Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a backlight module according to a first embodiment of the present application;

fig. 2 is a schematic cross-sectional view of an elastic buffer according to a first embodiment of the present application;

fig. 3 is a schematic view illustrating a partial structure of a backlight module according to a second embodiment of the present application;

fig. 4 is a schematic cross-sectional view illustrating an elastic buffer according to a second embodiment of the present application;

fig. 5 is a schematic view illustrating a partial structure of a backlight module according to a third embodiment of the present application;

fig. 6 is a schematic cross-sectional view illustrating an elastic buffer according to the third embodiment of the present application.

Description of reference numerals:

100. a back plate; 101. a base plate; 1011. mounting a plate; 1012. a sloping plate; 1013. a fixing plate; 102. a side plate; 200. an optical film layer; 201. a diffusion plate; 202. a brightness enhancement film; 203. a diffusion membrane; 300. an elastic buffer member; 301. an elastic main body portion; 3011. an upper portion of the elastic body portion; 3012. a lower portion of the elastic body portion; 30121. supporting legs; 302. an elastic extension portion; 3013. a through hole; 3014. an upper adsorption groove; 3015. a lower adsorption groove; 400. a light source; 500. a reflective sheet; 600. a limiting frame; 601. a first limiting part; 602. a second limiting part; 603. and a limiting connecting part.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.

The present application will be described in further detail with reference to the following drawings and specific examples. It should be noted that the technical features mentioned in the embodiments of the present application described below may be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

Example one

The embodiment of the application discloses a backlight module, as shown in fig. 1, which includes a back plate 100, an optical film 200, an elastic buffer 300, a light source 400, a reflective sheet 500 and a limiting frame 600. The elastic buffer members 300 on two sides are arranged between the edge of the optical film layer 200 and the backboard 100, and the optical film layer 200 can be supported by the elastic buffer members 300; moreover, since the elastic buffers 300 on both sides have elastic buffering power, a certain buffering effect is exerted on the optical film layer 200, and the problems of damage of the diffusion plate and the like are avoided; when the optical film 200 is horizontally placed, the elastic buffer member 300 applies an upward elastic supporting force to the optical film 200, and is matched with the limiting frame 600 to clamp the optical film 200 between the elastic buffer member 300 and the limiting frame 600, so that the problems of warping, wrinkling, deformation and the like caused by looseness of the optical film 200 are avoided.

Specifically, the back plate 100 has a supporting and bearing function, and the back plate 100 has a rectangular structure in a front view, and when applied to a circular anisotropic display device, the shape of the back plate 100 is a circular anisotropic shape; in the preferred embodiment, the backplate 100 is made of a metal material with good thermal conductivity, but in different embodiments, the backplate 100 can be made of a plastic with higher strength.

Specifically, as shown in fig. 1, a light source 400 is disposed on a side of the back plate 100 facing the inside of the backlight module to emit light; wherein, the light sources 400 are uniformly arranged on the back plate 100; in a preferred embodiment, the light source 400 may be a Light Emitting Diode (LED), but is not limited thereto; moreover, a reflective sheet 500 is laid between the back plate 100 and the light source 400 to improve the light shielding effect, prevent the back plate 100 from light leakage, and improve the display effect; the reflective sheet 500 may be made of a material with a good reflective effect, for example, the reflective sheet 500 may be a white reflective sheet.

Illustratively, as shown in fig. 1, the back plate 100 includes a bottom plate 101 and a side plate 102, specifically, the bottom plate 101 includes a mounting plate 1011, a sloping plate 1012 and a fixing plate 1013, wherein the mounting plate 1011 is fixedly connected to the fixing plate 1013 through the sloping plate 1012, that is, the mounting plate 1011, the sloping plate 1012, the fixing plate 1013 and the side plate 102 are connected in sequence, in the preferred embodiment, the mounting plate 1011, the sloping plate 1012, the fixing plate 1013 and the side plate 102 are integrally formed, so that the structure is more stable and the production cost is lower; but in different embodiments, a fixed connection by welding or riveting can be used.

Further, as shown in fig. 1, the light source 400 is fixedly disposed on the mounting plate 1011, and the optical film 200 is disposed on a side of the light source 400 away from the mounting plate 1011; moreover, since the inclined plate 1012 connects the mounting plate 1011 and the fixing plate 1013 and has a certain inclination, there is a height difference between the fixing plate 1013 and the mounting plate 1011, that is, a mounting cavity for mounting the optical film 200 is left, when the optical film 200 is fixed on the fixing plate 1013, the light emitted by the light source 400 can be adjusted by the optical film 200 and then emitted, so as to improve the display effect.

Further, as shown in fig. 1, in order to achieve a better light shielding effect and improve a display effect, the mounting plate 1011, the inclined plate 1012, and the fixing plate 1013 are provided with the reflection sheet 500 to prevent light emitted from the light source 400 from leaking from the edge.

The reflection sheet 500 may be fixed to the base plate 101, the inclined plate 1012, and the fixing plate 1013 by coating or bonding, but the fixing method is not limited thereto.

Further, as shown in fig. 1, the optical film layer 200 includes a diffusion plate 201, a brightness enhancement film 202, and a diffusion film 203 sequentially disposed along a vertical direction from the bottom plate 101 to the limiting frame 600; wherein, the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are all arranged in the installation cavity; it should be understood that the diffuser plate 201, diffuser film 203 and brightness enhancement film 202 are the same shape and are also of suitable dimensions; and the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are used for improving the optical performance of the backlight module, so that the display effect is improved.

It should be noted that, for different backlight modules, the optical film layer 200 may be a single-layer structure or a multi-layer structure.

Specifically, as shown in fig. 1, the diffusion plate 201 is disposed on a side of the light source 400 away from the mounting plate 1011, and a space is left between the diffusion plate 201 and the light source 400, so that on one hand, light passing through the diffusion plate 201 is more uniform, and imaging is better; another aspect is to facilitate heat dissipation from light source 400.

For example, the diffuser plate 201 is made of at least one material selected from the group consisting of PMMA, PC, PS, and PP.

Therefore, the diffusion plate 201 needs to cover all the areas where the light sources 400 are located on the back plate 100, and the diffusion plate has a relatively large size, so that the brightness enhancement film 202 and the diffusion film 203 are easily loosened, collapsed, warped and deformed due to the influence of self gravity, and the optical characteristics of the backlight module are deteriorated; this application is for supporting diffuser plate 201, avoid among the optical film layer 200 that bright enhancement membrane 202 and diffusion barrier 203 take place not hard up and the problem of diaphragm warpage, and eliminate the shadow problem that the support frame produced, set up banding elastomeric buffer 300 between diffuser plate 201 and fixed plate 1013, so that diffuser plate 201, bright enhancement membrane 202 and diffusion barrier 203 can press from both sides tightly between elastomeric buffer 300 and spacing frame 600, prevent to take place not hard up between bright enhancement membrane 202 and the diffusion barrier 203, thereby produce the problem of diaphragm deformation and warpage, as shown in fig. 1.

Specifically, as shown in fig. 1, the edge of the diffuser 201 close to the bottom plate 101 is connected to the bottom plate 101 through the elastic buffer 300, so that the optical film layer 200 is supported on the bottom plate 101 and clamped between the elastic buffer 300 and the limiting frame 600, and the problem that the diffuser 201, the brightness enhancement film 202 and the diffuser 203 are loosened to affect the warping of the film is avoided.

Specifically, the edge of the diffusion plate 201 near one side of the fixing plate 1013 is connected to the fixing plate 1013 through the elastic buffer 300; for example, when the housing 100 is rectangular, the four sides of the diffuser 201 and the fixing plate 1013 are provided with the elastic buffers 300, and the elastic buffers 300 on the two opposite sides apply an elastic force and a supporting force to the diffuser 201 toward the diffuser 201, so as to support the diffuser 201 on the one hand, and apply an elastic force to the diffuser 201 along the upward direction of the diffuser on the other hand, so that the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are clamped in the elastic buffer 300 and the spacing frame 600, so as to avoid or relieve the problem of downward collapse caused by self gravity or external force, to solve the problem of looseness between the brightness enhancement film 202 and the diffusion film 203 relative to the fixing plate 1013, namely, the fixing stability between the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 and the fixing plate 1013 is ensured, therefore, the problems of looseness or membrane buckling deformation and the like between the brightness enhancement film 202 and the diffusion film 203 can be relieved or avoided.

It should be noted that the backlight module employs four sets of elastic buffers 300, which are respectively fixed with the edges of the four sides of the diffuser 201, so that the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are clamped between the elastic buffer 300 and the spacing frame 600, so that when the brightness enhancement film 202 and the diffusion film 203 are horizontally placed, the brightness enhancement film will not be affected by its own weight or external force, resulting in looseness between the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 and the fixing plate 1013, thereby, the problem of offset between the brightness enhancement film 202 and the diffusion film 203 occurs, and the diffusion plate 201 and the optical film 200 are provided with elastic buffer force and support force, which on one hand supports the optical film 200, and on the other hand, by clamping the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 with the limiting frame 600, the fixing stability between the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 and the fixing plate 1013 is ensured, therefore, the problems of looseness between the brightness enhancement film 202 and the diffusion film 203 and warping and wrinkling of the film sheet can be relieved or avoided.

Of course, the backlight module can also fix the elastic buffer 300 only on the opposite sides of the diffuser 201, and can also support the optical film 200.

Specifically, the edge of the diffuser 201 is connected to the fixing plate 1013 through the elastic buffer 300 to provide an elastic buffer force and a supporting force to the diffuser 201 toward the diffuser 201, and interact with the spacing frame 600 to clamp the diffuser 201, the brightness enhancement film 202 and the diffuser film 203 between the elastic buffer 300 and the spacing frame 600, so as to ensure the fixing stability between the diffuser 201, the brightness enhancement film 202 and the diffuser film 203 and the fixing plate 1013, thereby avoiding the problems of looseness and film warpage among the diffuser 201, the brightness enhancement film 202 and the diffuser film 203.

Further, as shown in fig. 1, the upper side of the optical film layer 200 abuts against the limiting frame 600, and the optical film layer 200 is clamped between the limiting frame 600 and the elastic buffer 300 through the limiting frame 600 and the elastic buffer 300, so that the brightness enhancement film 202 and the diffusion film 203 are prevented from loosening, and the display effect is improved.

Specifically, as shown in fig. 1, the diffuser 201, the brightness enhancement film 202 and the diffuser 203 are clamped between the limiting frame 600 and the elastic buffer 300, and the elastic buffer 300 can be used to apply an elastic force to the diffuser 201 toward the diffuser 201, so that the friction between the diffuser 201, the brightness enhancement film 202 and the diffuser 203 and the fixing plate 1013 and the limiting frame 600 can be increased, thereby avoiding or relieving the situation that the edges of the diffuser 201, the brightness enhancement film 202 and the diffuser 203 are loosened relative to the limiting frame 600 and the fixing plate 1013 due to self gravity or external force, that is: the fixing stability between the edges of the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 and between the limiting frame 600 and the fixing plate 1013 is ensured, so that the problems of looseness, film buckling deformation and the like between the brightness enhancement film 202 and the diffusion film 203 can be relieved or avoided.

Alternatively, the elastic buffer 300 may also be disposed between the edge of the limiting frame 600 and the edge of the diffusion film 203, and may also play a role in limiting the looseness and the film warpage between the diffusion plate 201, the brightness enhancement film 202, and the diffusion film 203; an elastic force towards the diffusion plate 201 can be applied to the diffusion film 203 by using the elastic buffer 300, so that the edges of the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are clamped between the elastic buffer 300 and the limiting frame 600, and the fixing stability of the edges of the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 relative to the limiting frame 600 and the fixing plate 1013 due to the influence of the self gravity or external force of the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 is avoided or alleviated, so that the problems of looseness or membrane buckling deformation and the like between the brightness enhancement film 202 and the diffusion film 203 can be alleviated or avoided.

Further, as shown in fig. 1 and 2, the elastic buffer member 300 includes an elastic main body portion 301, the elastic main body portion 301 being interposed between an edge of the diffusion plate 201 and the fixing plate 1013; the main body 301 includes a lower suction recess 3015, the lower suction recess 3015 is disposed at the lower portion 3012 of the main body, and the lower suction recess 3015 opens toward the fixing plate 1013 or the diffusion plate 201.

The opening of the lower adsorption groove 3015 faces to one side of the fixing plate 1013 and is connected with the fixing plate 1013 in an adsorption way; it should be understood that when the opening of the lower adsorption groove 3015 is adsorbed and attached to the fixing plate 1013, it can remove the gas in the lower adsorption groove 3015, i.e. it can be vacuum-adsorbed on the fixing plate 1013, so that it is stably adsorbed on the fixing plate 1013 and is not easy to fall off.

Specifically, as shown in fig. 1 and fig. 2, the lower adsorption groove 3015 may be in an arch shape, it should be noted that a side close to the side plate 102 is an outer side, a side far away from the side plate 102 is an inner side, a film thickness of the supporting leg 30121 of the outer lower adsorption groove 3015 is the same as a film thickness of the supporting leg 30121 of the inner lower adsorption groove 3015, so that adsorption is more stable and stable, and a film layer on the periphery of the opening of the lower adsorption groove 3015 contacts the fixing plate 1013.

Further, as shown in fig. 1 and 2, in the direction from the bottom plate 101 to the elastic main body portion 301, the diameter of the lower portion 3012 of the elastic main body portion to the middle portion of the elastic main body portion gradually decreases, and the diameter of the middle portion of the elastic main body portion to the upper portion 3011 of the elastic main body portion gradually increases. Therefore, the diameter of the elastic main body part 301 at the waist part is the smallest, which is more beneficial to buffering deformation, namely recovering deformation, so that the diffusion plate 201 can better provide elastic deformation capability when being influenced by external force; and the first limiting part 601 is combined to clamp the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203, so that the problems of warping and deformation of the film caused by looseness of the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are avoided.

The elastic buffer 300 may be a rubber structure, for example, the elastic buffer 300 is a black rubber pad, which can better provide an elastic buffer force, prevent the brightness enhancement film 202 and the diffusion film 203 from shifting, improve the display effect, and avoid the problem of light leakage at the edge.

The elastic buffer 300 may have a fixed width. It should be understood that, when a mode of gradually changing the width is adopted, the elasticity performance is better, the shape recovery is more facilitated, and the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are clamped between the upper part 3011 of the elastic main body part and the limiting frame 600, so that the relative sliding between the brightness enhancement film 202 and the diffusion film 203 is avoided, and the problems of wrinkling and loosening and non-leveling are better solved; the film layer inside the elastic main body 301 may be disposed on the fixing plate 1013 or at the joint between the fixing plate 1013 and the inclined plate 1012, but does not exceed the joint, so as to avoid blocking part of the light emitted by the light source 400 and affecting the display effect.

In addition, when the elastic main body 301 is fixed on the fixing plate 1013, the reflecting sheet 500 is provided with corresponding grooves for the elastic main body 301 and the fixing plate 1013 to adsorb, which not only can achieve the light shielding effect, but also can satisfy the vacuum fixing adsorption of the elastic buffer 300 and the back plate 100.

It should be noted that, because the elastic buffer 300 is disposed between the edge of the diffuser 201 and the fixing plate 1013, the situation that the light emitted by the light source 400 is shielded by the support frame disposed between the light sources 400 can be avoided, so that the problem of generating a dark shadow on the display panel can be solved; and the elastic buffer piece 300 adopts vacuum adsorption and is matched with the limiting frame 600, so that the diffusion plate 201, the bright enhancement film 202 and the diffusion film 203 can be better clamped, and the problem of membrane warping caused by relative sliding among the diffusion plate 201, the bright enhancement film 202 and the diffusion film 203 is avoided.

Further, in order to better provide the light shielding effect, a light shielding layer is disposed on a side of the elastic buffer 300 close to the optical film 200, for example, the light shielding layer may be made of the same material as the reflective sheet 500, so as to improve the better light emitting effect.

Further, as shown in fig. 1, the limiting frame 600 includes a first limiting portion 601, a second limiting portion 602, and a limiting connection portion 603, wherein the first limiting portion 601 is connected to the second limiting portion 602 through the limiting connection portion 603, and the first limiting portion 601 abuts against the edge of the diffusion film 203 on the side far away from the diffusion plate 201, so as to play a role of clamping the diffusion plate 201, the diffusion film 203, and the brightness enhancement film 202 with the elastic buffer 300, thereby avoiding the problems of the looseness of the film and the warpage of the film caused by the relative displacement between the brightness enhancement film 202 and the diffusion film 203, and improving the display effect.

In addition, in order to fix the first position-limiting portion 601 and the brightness enhancement film 202 better, the second position-limiting portion 602 is fixedly connected to the side plate 102, for example, the second position-limiting portion 602 and the side plate 102 can be fixed on the side plate 102 by a fixing method such as bolts or screws, so as to ensure the stability of the position-limiting frame 600.

Example two

The difference between the second embodiment and the first embodiment is that, as shown in fig. 3 and fig. 4, the elastic buffer 300 further includes an upper absorption groove 3014, the upper absorption groove 3014 is disposed on the upper portion of the elastic buffer 300, wherein the upper absorption groove 3014 is disposed on the opposite side of the lower absorption groove 3015 and connected to the side of the lower absorption groove 3015 away from the fixing plate 1013, the opening of the upper absorption groove 3014 faces the diffuser 201, and the end surfaces of the two ends of the opening are connected to the diffuser 201 in an abutting manner.

It should be noted that, as shown in fig. 4, the specific structure of the upper adsorption groove 3014 is the same as that of the lower adsorption groove 3015, and the vacuum adsorption principle of the lower adsorption groove 3015 and the fixing plate 1013 is also the same, and the description thereof is omitted; in a preferred embodiment, the lower absorption groove 3015 and the upper absorption groove 3014 are symmetrically designed to ensure the stability of the elastic buffer 300 and also to improve the overall elastic deformation capability of the elastic buffer 300.

In addition, the upper suction grooves 3014 are sequentially reduced in width along the vertical direction from the diffusion plate 201 to the fixing plate 1013, and together with the lower suction grooves 3015 formed at the lower portion 3012 of the elastic main body, the elastic main body 301 is formed into an "X" shape to better provide elastic deformability; and the first limiting part 601 is combined to clamp the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203, so that the problems of warping and deformation of the film caused by looseness of the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are avoided.

EXAMPLE III

Embodiment three phases are different from embodiment two in that, as shown in fig. 5 and fig. 6, the elastic buffer 300 further includes an elastic extension portion 302, the elastic extension portion 302 is respectively connected to the film layer on the side of the lower adsorption groove 3015 close to the side plate 102 and the film layer on the side of the upper adsorption groove 3014 close to the side plate 102, and forms a through hole 3013 with the lower adsorption groove 3015 and the upper adsorption groove 3014, so as to better provide the elastic deformation capability; in addition, the elastic extension portion 302 extends along the vertical direction from the fixing plate 1013 to the diffusion plate 201, and abuts against one side of the diffusion plate 201, the diffusion film 203 and the brightness enhancement film 202 close to the side plate 102 to abut against the edges of the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203, and the diffusion plate 201, the brightness enhancement film 202 and the diffusion film 203 are clamped in the elastic extension portions 302 on two sides by arranging the elastic buffer members 300 on two opposite sides, so as to better limit the deviation of the brightness enhancement film 202 and the diffusion film 203, solve the problem of loose and uneven brightness enhancement film 202, the diffusion film 203 and the diffusion plate 201, and better improve the display effect; and also better protects the diffuser plate 201, the brightness enhancement film 202, and the diffuser film 203.

In addition, as shown in fig. 5, a certain distance is reserved between the side of the elastic extension portion 302 away from the fixing plate 1013 and the limiting frame 600, so as to provide a distance for pulling up or stretching out and drawing back when the elastic buffer 300 is compressed, and ensure that the overall deformation of the elastic buffer 300 is controllable.

Example four

The embodiment provides a display device, which comprises a display panel and the backlight module of the first embodiment, the second embodiment and the third embodiment, wherein the display panel is positioned at the light emitting side of the backlight module, the shape and the size of the display panel are generally matched with those of the backlight module, and the display panel can be arranged to be rectangular or round in general.

The display panel may be a liquid crystal display panel or a Mini-LED display panel, which is capable of modulating the transmittance of light, but does not emit light by itself. The display panel is provided with a plurality of pixel units which are arranged in an array mode, and each pixel unit can independently control the light transmittance and the color of light which is incident to the pixel unit by the backlight module, so that the light transmitted by all the pixel units forms a displayed image.

In this embodiment, the backlight module adopts a direct-type backlight module for emitting light uniformly in the whole light-emitting surface, so as to provide light with sufficient brightness and uniform distribution for the display panel, so that the display panel can normally display images.

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.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description herein, references to the description of the terms "some embodiments," "exemplary," etc. mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or exemplary is included in at least one embodiment or exemplary of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described, it is understood that the above embodiments are illustrative and should not be construed as limiting the present application and that various changes, modifications, substitutions and alterations can be made therein by those skilled in the art within the scope of the present application, and therefore all changes and modifications that come within the meaning of the claims and the description of the invention are to be embraced therein.

Claims (10)

1. A backlight module includes:

a back plate comprising a bottom plate;

an optical film layer, an edge of the optical film layer supported on the base plate; it is characterized in that the preparation method is characterized in that,

the limiting frame comprises a first limiting part, and the first limiting part is positioned on one side of the optical film layer, which is far away from the bottom plate, and is abutted against the edge of the optical film layer;

and at least part of the elastic buffer piece is arranged between the edge of the optical film layer and the bottom plate and/or between the edge of the optical film layer and the first limiting part.

2. The backlight module according to claim 1, wherein the elastic buffer comprises an elastic main body portion disposed between the edge of the optical film and the bottom plate, the elastic main body portion comprises an upper suction groove and/or a lower suction groove, an opening of the upper suction groove faces the optical film, and an opening of the lower suction groove faces the bottom plate.

3. The backlight module according to claim 2,

the diameter from the lower part of the elastic main body part to the middle part of the elastic main body part is gradually reduced, and the diameter from the middle part of the elastic main body part to the upper part of the elastic main body part is gradually increased.

4. The backlight module as claimed in claim 2, wherein the elastic buffer is a black rubber structure.

5. The backlight module according to claim 2,

the back plate further comprises a side plate, the side plate is connected with the bottom plate and encloses a mounting cavity, and the optical film layer is located in the mounting cavity;

the elastic buffer piece further comprises an elastic extension part connected with the elastic main body part, and at least part of the elastic extension part is located between the side plate and the optical film layer.

6. The backlight module according to claim 5,

the elastic extension part is connected with the elastic main body part through a through hole, and the through hole is located between the bottom plate and the optical film layer.

7. The backlight module according to claim 1,

and a shading layer is arranged on one side of the elastic buffer part, which is close to the optical film layer.

8. The backlight module according to claim 1,

the back plate further comprises a side plate, the side plate is connected with the bottom plate and encloses a mounting cavity, and the optical film layer is located in the mounting cavity;

the limiting frame further comprises a second limiting part and a limiting connecting part connected with the first limiting part and the second limiting part, and the second limiting part is in contact with one side of the side plate, which is far away from the optical film layer.

9. The backlight module according to any of claims 1-8,

the optical film layer comprises a diffusion film, a brightness enhancement film and a diffusion plate which are sequentially arranged in the vertical direction from the first limiting part to the bottom plate; and/or

The bottom plate is close to one side of optics rete is provided with the reflection stratum, just the reflection stratum is close to one side of optics rete is provided with the light source, the light source with have the clearance between the optics rete.

10. A display device, comprising a display panel and the backlight module of any one of claims 1 to 9, wherein the display panel is disposed on a light-emitting side of the backlight module.

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