CN217386063U - Backlight module and display device - Google Patents

Abstract

The utility model provides a backlight module and display device. The backlight module comprises a composite film, a diffusion plate, a light source, a back plate and a shading piece, wherein the composite film is a diffusion prism composite film, and the diffusion plate is covered with the composite film; one surface of the diffusion plate, which is far away from the composite film, is connected with the back plate, the light source is arranged on the back plate, and the light-emitting surface of the light source faces the diffusion plate; the one side that the complex film deviates from the diffuser plate has a light zone and winds the non-light zone of establishing on light zone week side, and the piece that shades sets up on non-light zone. The utility model provides a backlight module, the preparation degree of difficulty is low, and the packaging efficiency is high.

Description

Backlight module and display device

Technical Field

The utility model relates to a display technology especially relates to a backlight module and display device.

Background

The backlight module is one of the key components of the liquid crystal display panel. The backlight module has the function of supplying sufficient light source with uniform brightness and distribution, so that the liquid crystal display panel can normally display images.

The backlight module in the prior art includes a module back plate, various optical films (such as module diffuser plate, prism sheet, diffuser sheet, etc.), and a middle frame. All kinds of optical films are positioned through the guide posts and the folding lugs on the back plate respectively, and are fixed through the middle frame in a pressing mode after being arranged in a laminated mode. Wherein, the center passes through the screw and is connected with the module backplate.

However, the backlight module has high manufacturing difficulty and low assembly efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides a backlight module and display device, backlight module's the preparation degree of difficulty is low, and the packaging efficiency is high.

In a first aspect, the present invention provides a backlight module, which comprises a composite film, a diffusion plate, a light source, a back plate and a light shielding member,

the composite film is a diffusion prism composite film, and the composite film covers the diffusion plate;

one surface of the diffusion plate, which is far away from the composite film, is connected with the back plate, the light source is arranged on the back plate, and the light-emitting surface of the light source faces the diffusion plate;

the one side that the complex film deviates from the diffuser plate has a light zone and winds the non-light zone of establishing on light zone week side, and the piece that shades sets up on non-light zone.

In a possible implementation manner, the utility model provides a backlight module, the side of the piece that shades and the side parallel and level of the complex film with the side homonymy of the piece that shades, the piece that shades bonds with the complex film.

In a possible implementation manner, the utility model provides a backlight module, the piece that shades is shading single face sticky tape, and the one side that the piece that shades has the glue film is not glued in light-emitting area.

In a possible implementation manner, the utility model provides a backlight module still includes first bonding piece, and first bonding piece setting is between complex film and diffuser plate, and diffuser plate and complex film bond through first bonding piece.

In a possible implementation manner, in the backlight module provided by the present invention, the projection of the first bonding member toward the composite film is located in at least a part of the non-light-exiting area;

at least one opposite two sides of the non-light-emitting area are provided with first bonding pieces.

In a possible implementation manner, the utility model provides a backlight module, first bonding piece are optics transparent double-sided tape.

In a possible implementation manner, the utility model provides a backlight module still includes the second piece that bonds, and the second setting that bonds is between diffuser plate and backplate, and the diffuser plate passes through the second piece that bonds with the backplate.

In a possible implementation manner, the utility model provides a backlight module, the second bonding piece is the elasticity bonding piece.

In a possible implementation manner, the utility model provides a backlight module has at least one first location portion on the diffuser plate, has at least one and first location portion assorted second location portion on the backplate, and first location portion sets up with second location portion one-to-one.

In a possible implementation manner, the utility model provides a backlight module, one in first location portion and the second location portion is protruding, another for with protruding assorted constant head tank, the arch is located the constant head tank.

In a possible implementation manner, the utility model provides a backlight module still includes the reflection paper, and the reflection paper covers in the one side of backplate towards the diffuser plate, and the reflection paper has the hole of dodging that is used for dodging the light source.

In a second aspect, the present application provides a display device, which includes a display panel and the backlight module provided in the first aspect, wherein one side of the display panel departing from the light emitting surface is connected to a back plate of the backlight module.

The utility model provides a backlight unit and display device, backlight unit is through setting up the complex film, the diffuser plate, the light source, backplate and anti-dazzling screen, the complex film is the diffusion prism complex film, the complex film covers on the diffuser plate, the diffuser plate is connected with the backplate, the light source sets up on the backplate, thus, need not to install diffusion piece and prism piece respectively, can reduce backlight unit's the preparation degree of difficulty, improve backlight unit's packaging efficiency, the one side that the complex film deviates from the diffuser plate has out the light zone and around establishing the non-light-emitting zone in light-emitting zone week side, anti-dazzling screen sets up on non-light-emitting zone, thus, can utilize anti-dazzling screen to realize the function of shading, thereby improve the utilization ratio of the light that the light source sent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of an internal structure of a backlight module in the prior art;

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

fig. 3 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;

fig. 4 is a schematic view of an internal structure of a backlight module according to an embodiment of the present invention;

FIG. 5 is a partial enlarged view of the portion B in FIG. 4;

fig. 6 is a schematic structural diagram of a composite film in a backlight module according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating positions of a diffusion plate and a first bonding member in a backlight module according to an embodiment of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 3 at C;

fig. 9 is a schematic diagram of positions of a back plate and a reflective paper in a backlight module according to an embodiment of the present invention.

Description of the reference numerals:

10-a module backplane;

20-a module diffuser plate;

30-prism sheet;

40-a diffusion sheet;

50-middle frame;

60-foam cotton;

100-composite membranes;

110-light emitting area;

120-non-light-emitting area;

200-a diffusion plate;

210-a first positioning portion;

300-a light source;

400-a back plate;

410-a second locator portion;

500-a shade;

600-a first adhesive;

700-a second adhesive;

800-reflective paper;

810-avoiding holes.

Detailed Description

In the description of the present invention, it is to be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The terms "first," "second," and "third" (if any) in the description and claims of this invention and the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or maintenance tool that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or maintenance tool.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Fig. 1 is a schematic view of an internal structure of a backlight module in the prior art, and fig. 2 is a partial enlarged view of a point a in fig. 1.

Referring to fig. 1 and 2, a conventional backlight module includes a module back plate 10, light bars (not shown), a module diffuser plate 20, a prism sheet 30, a diffuser plate 40, and a middle frame 50. Specifically, the diffusion sheet 40, the prism sheet 30 and the module diffusion plate 20 are sequentially stacked, one surface of the module diffusion plate 20 away from the prism sheet 30 abuts against the module back plate 10, and the middle frame 50 is pressed on the diffusion sheet 40 through the foam 60 and fixed on the module back plate 10 in a screw locking manner.

The middle frame 50 has two functions, namely fixing the optical film and shading the optical film.

However, in order to limit and fix the optical film of the conventional backlight module, many structural features need to be designed, for example, a guide post and a folding lug are arranged on the module back plate 10, a hanging hole and a hanging lug need to be arranged on the corresponding optical film, and a plurality of threaded holes are arranged on the module back plate 10 in order to fix the middle frame 50. These make backlight unit's the preparation degree of difficulty great, manufacturing cost is higher, and the packaging efficiency is lower.

In order to solve the technical problem, the utility model provides a backlight unit and display device, backlight unit reduce the quantity of optical film piece through adopting the diffusion prism complex film, can reduce backlight unit's the preparation degree of difficulty, improve backlight unit's packaging efficiency. The light shading piece is arranged on the diffusion prism composite film to replace the light shading effect of the middle frame 50 on the optical film, the diffusion plate is bonded with the diffusion prism composite film, and the diffusion plate is bonded with the back plate, so that the optical film is fixed. Therefore, the backlight module does not need to be provided with the middle frame 50, the structure of the backlight module is simplified, the manufacturing difficulty is reduced, the production cost is reduced, and the assembly efficiency is improved.

The present invention will be described with reference to the accompanying drawings and specific embodiments.

Fig. 3 is a schematic structural diagram of a backlight module according to an embodiment of the present invention, fig. 4 is a schematic structural diagram of an interior of a backlight module according to an embodiment of the present invention, fig. 5 is a partial enlarged view of a position B in fig. 4, and fig. 6 is a schematic structural diagram of a composite film in a backlight module according to an embodiment of the present invention.

Referring to fig. 3 to 6, the present invention provides a backlight module including a composite film 100, a diffusion plate 200, a light source 300, a back plate 400 and a light shielding member 500.

The composite film 100 is a diffusion prism composite film, and the diffusion plate 200 is covered with the composite film 100. One surface of the diffusion plate 200 departing from the composite film 100 is connected to the back plate 400, the light source 300 is disposed on the back plate 400, and the light-emitting surface of the light source 300 faces the diffusion plate 200.

One surface of the composite film 100 facing away from the diffuser plate 200 has a light emergent region 110 and a non-light emergent region 120 wound around the light emergent region 110, and the light shielding member 500 is disposed on the non-light emergent region 120.

During the use, refraction and diffuse reflection take place during the light that light source 300 sent conducts in diffuser plate 200, and the light angle changes to be favorable to the evenly distributed of light, when light passes through the diffusion prism complex film, light is gathered and diffusion atomization process, like this, can promote the luminance and the homogeneity of light.

It can be understood that, by using the diffusion prism composite film, the assembly efficiency of the backlight module can be improved and the overall thickness of the backlight module can be reduced compared to the case where the diffusion sheet 40 and the prism sheet 30 are separately provided in the related art.

In a specific implementation, the light-shielding member 500 is a frame-shaped structure, and a region enclosed by the inner frame of the light-shielding member 500 corresponds to the light-emitting region 110 of the composite film 100. The light blocking member 500 serves to prevent interference of an external light source and leakage of light inside the backlight assembly, thereby improving light utilization efficiency.

For example, the light source 300 may be a lamp bead or a lamp strip.

The backlight module provided by the embodiment, through setting up the composite film 100, the diffuser plate 200, the light source 300, the backplate 400 and the shading piece 500, the composite film 100 is a diffusion prism composite film, the composite film 100 covers on the diffuser plate 200, the diffuser plate 200 is connected with the backplate 400, the light source 300 is arranged on the backplate 400, thus, the diffuser sheet 40 and the prism sheet 30 do not need to be installed respectively, the difficulty of manufacturing the backlight module can be reduced, the assembly efficiency of the backlight module is improved, one side of the composite film 100 departing from the diffuser plate 200 is provided with the light emergent area 110 and the non-light emergent area 120 around the light emergent area 110, the shading piece 500 is arranged on the non-light emergent area 120, thus, the shading function can be realized by the shading piece 500, and the utilization rate of light emitted by the light source 300 is improved.

In order to improve the light-shielding effect, the side surface of the light-shielding member 500 is flush with the side surface of the composite film 100 on the same side as the side surface of the light-shielding member 500, and the light-shielding member 500 is bonded to the composite film 100. That is, the light-shielding member 500 is attached to the peripheral edge of the composite film 100, and the outer frame of the light-shielding member 500 is flush with the edge of the composite film 100. Thus, the light-shielding member 500 fills the entire non-light-exiting region 120 of the composite film 100.

In a specific implementation, the light shielding member 500 is a light shielding single-sided tape, and one side of the light shielding member 500 having an adhesive layer is bonded to the non-light-emitting area 120. Thus, the assembly of the light-shielding member 500 and the composite film 100 is facilitated, thereby improving the assembly efficiency of the backlight module.

The light shielding member 500 is a black light shielding single-sided tape. The black shading single-sided adhesive tape is low in price, and the processing cost of the backlight module can be reduced.

In a possible implementation manner, the backlight module further includes a first adhesive 600, the first adhesive 600 is disposed between the composite film 100 and the diffusion plate 200, and the diffusion plate 200 and the composite film 100 are adhered by the first adhesive 600. Thus, the assembly of the diffusion plate 200 and the composite film 100 is facilitated, thereby improving the assembly efficiency of the backlight module.

Fig. 7 is a schematic position diagram of a diffusion plate and a first bonding member in a backlight module according to an embodiment of the present invention.

With continued reference to fig. 5 and 7, to reduce the effect of the first adhesive 600 on the optical performance of the composite film 100, a projection of the first adhesive 600 onto the composite film 100 is located at least partially within the non-light-exiting region 120.

In a specific implementation, the first adhesive 600 is an optically transparent double-sided tape for facilitating assembly of the diffuser plate 200 and the composite film 100.

It is understood that the surface of the composite film 100 has microstructures for collecting light, and the light-collecting effect of the microstructures is weakened by the optically transparent double-sided adhesive attached to the composite film 100, so that the projection of the optically transparent double-sided adhesive toward the composite film 100 is located in a part of the non-light-exiting region 120, thereby minimizing the influence on the optical performance of the composite film 100.

At least one of the two opposite sides of the non-light-emitting area 120 has a first adhesive member 600.

The first adhesive member 600 may be located on the left and right sides or the upper and lower sides of the diffusion plate 200 in fig. 7, or the first adhesive member 600 is disposed around the diffusion plate 200.

In a specific implementation, the first bonding members 600 are located at upper and lower sides of the diffusion plate 200, so as to improve the connection reliability between the diffusion plate 200 and the composite film 100.

In some embodiments, the outer edge of the first adhesive member 600 is flush with the edge of the composite film 100.

It should be noted that the first adhesive member 600 is located on the top side or the bottom side of the diffusion plate 200 (i.e., the top and bottom sides of the diffusion plate 200 in fig. 7), which can effectively reduce the deformation of the diffusion plate 200 and the composite film 100 caused by the difference between the thermal shrinkage rates of the composite film 100 and the diffusion plate 200.

In one possible implementation manner, in order to facilitate the assembly of the diffusion plate 200 and the backplate 400, the backlight module further includes a second adhesive member 700, the second adhesive member 700 is disposed between the diffusion plate 200 and the backplate 400, and the diffusion plate 200 and the backplate 400 pass through the second adhesive member 700.

The second adhesive member 700 is an elastic adhesive member. Since the diffusion plate 200 and the backplate 400 have different thermal shrinkage coefficients, the elastic adhesive having better elasticity is used to offset the deformation of the diffusion plate 200 caused by the difference in temperature-dependent shrinkage.

Specifically, the second adhesive member 700 is a silicone adhesive.

The second adhesive members 700 may be disposed at intervals, for example, the light shielding member 500 is attached to the edge of the periphery of the diffusion plate 200, the plurality of second adhesive members 700 may be disposed on the upper and lower sides of the diffusion plate 200, the plurality of second adhesive members 700 are disposed at intervals, and one second adhesive member 700 may be disposed on each of the upper and lower sides of the diffusion plate 200.

The number of the second adhesive members 700 is not particularly limited, and it is only necessary to ensure that the diffusion plate 200 and the backplate 400 are reliably connected.

In one possible implementation, the outer edge of the second adhesive member 700 is flush with the edge of the diffusion plate 200.

Fig. 8 is a partially enlarged view at C in fig. 3.

Referring to fig. 8, in order to accurately mount the diffuser 200, the diffuser 200 has at least one first positioning portion 210, the back plate 400 has at least one second positioning portion 410 matching with the first positioning portion 210, and the first positioning portion 210 and the second positioning portion 410 are disposed in a one-to-one correspondence manner.

The number of the first positioning portions 210 and the second positioning portions 410 may be one, or the number of the first positioning portions 210 and the second positioning portions 410 may be one or more. The number of the first positioning portions 210 and the second positioning portions 410 is not particularly limited in this embodiment.

It should be noted that, after the composite film 100 and the diffusion plate 200 are assembled, the diffusion plate 200 is connected to the backplane 400, and thus, only one positioning is needed during the assembly, and compared with the guide posts and the folding lugs arranged on the backplane 400 in the prior art, a hanging hole and a hanging lug need to be arranged on each corresponding optical film, and the positioning is needed during the installation of each optical film. And moreover, the assembly processes of the backlight module are reduced, and the arrangement of automatic production equipment of the backlight module is facilitated.

In one possible implementation manner, one of the first positioning portion 210 and the second positioning portion 410 is a protrusion, and the other is a positioning groove matching with the protrusion, and the protrusion is located in the positioning groove.

Specifically, as shown in fig. 8, the first positioning portion 210 is a protrusion, and the second positioning portion 410 is a positioning groove matching with the protrusion. In order to improve the accuracy of positioning, the number of the first positioning portions 210 and the second positioning portions 410 is three.

In another possible implementation manner, the first positioning portion 210 and the second positioning portion 410 are scribed lines indicating positions, and when the diffuser plate 200 is mounted, the first positioning portion 210 and the second positioning portion are aligned to complete the positioning of the diffuser plate 200.

Fig. 9 is a schematic diagram of positions of a back plate and a reflective paper in a backlight module according to an embodiment of the present invention.

Referring to fig. 9, in some embodiments, the backlight assembly further includes a reflective paper 800.

The reflective paper 800 covers a surface of the back plate 400 facing the diffusion plate 200, and the reflective paper 800 has an avoiding hole 810 for avoiding the light source 300.

It is understood that the efficiency of the reflective paper 800 to reflect light is greater than the efficiency of the back sheet 400 to reflect light.

Thus, the light emitted from the light source 300 on the back plate 400 is transmitted to the diffusion plate 200 through the avoiding hole 810, part of the light passes through the diffusion plate 200, and part of the light is reflected to the reflection paper 800, and the reflected light can be transmitted to the diffusion plate 200 again by the reflection paper 800, thereby improving the light utilization efficiency.

Specifically, the light source 300 may be a lamp bead, the avoiding hole 810 is a circular hole, and the avoiding hole 810 and the lamp bead are arranged in a one-to-one correspondence manner.

The embodiment of the utility model provides a still provide a display device, including the backlight unit that display panel and above-mentioned embodiment provided, one side that display panel deviates from the plain noodles is connected with backlight unit's backplate 400.

The structure and principle of the backlight module are described in detail in the above embodiments, which are not repeated herein.

Specifically, the display device may be an interactive intelligent tablet (interactive intelligent panel).

The display device provided by the embodiment is provided with the display panel and the backlight module, and the backlight module reduces the number of optical films by adopting the diffusion prism composite film 100. The light shading piece 500 is arranged on the diffusion prism composite film to replace the light shading effect of the middle frame 50 on the optical film, the diffusion plate 200 is connected with the diffusion prism composite film, the diffusion plate 200 is connected with the back plate 400, and the fixation of the optical film is achieved. The backlight module does not need to be provided with the middle frame 50, and has the advantages of simple structure, low manufacturing difficulty, low production cost and high assembly efficiency. Thus, the whole assembly efficiency of the display device can be improved, and the whole production cost of the display device can be reduced.

It is to be understood that the illustrated structure of the embodiments of the present application does not constitute a specific limitation to the display device. In other embodiments of the present application, the display device may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components may be used. For example, the display device may also include structures such as tempered glass, touch components, and the like.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (12)

1. A backlight module is characterized in that the backlight module comprises a composite film, a diffusion plate, a light source, a back plate and a shading member,

the composite film is a diffusion prism composite film, and the composite film covers the diffusion plate;

one surface of the diffusion plate, which is far away from the composite film, is connected with the back plate, the light source is arranged on the back plate, and the light-emitting surface of the light source faces the diffusion plate;

one surface of the composite film, which is far away from the diffusion plate, is provided with a light emergent area and a non-light emergent area wound on the periphery of the light emergent area, and the light shading piece is arranged on the non-light emergent area.

2. The backlight module according to claim 1, wherein the side of the light shielding member is flush with the side of the composite film on the same side as the side of the light shielding member, and the light shielding member is bonded to the composite film.

3. The backlight module as claimed in claim 1, wherein the light shielding member is a light shielding single-sided tape, and one side of the light shielding member having an adhesive layer is bonded to the non-light-emitting area.

4. The backlight module according to any one of claims 1 to 3, further comprising a first adhesive member disposed between the composite film and the diffuser plate, wherein the diffuser plate and the composite film are adhered by the first adhesive member.

5. The backlight module according to claim 4, wherein a projection of the first adhesive member toward the composite film is located in at least a portion of the non-light-exiting region;

at least one opposite two sides of the non-light-emitting area are provided with the first bonding pieces.

6. The backlight module as claimed in claim 5, wherein the first adhesive member is an optically transparent double-sided tape.

7. The backlight module according to any one of claims 1 to 3, further comprising a second adhesive member disposed between the diffuser plate and the back plate, wherein the diffuser plate and the back plate pass through the second adhesive member.

8. The backlight module as claimed in claim 7, wherein the second adhesive member is an elastic adhesive member.

9. The backlight module according to any of claims 1 to 3, wherein the diffuser plate has at least one first positioning portion, the back plate has at least one second positioning portion matching with the first positioning portion, and the first positioning portion and the second positioning portion are disposed in a one-to-one correspondence.

10. The backlight module according to claim 9, wherein one of the first and second positioning portions is a protrusion, and the other one is a positioning groove matching with the protrusion, and the protrusion is located in the positioning groove.

11. The backlight module according to any one of claims 1 to 3, further comprising a reflective paper covering a surface of the back plate facing the diffuser plate, wherein the reflective paper has an avoiding hole for avoiding the light source.

12. A display device, comprising a display panel and the backlight module of any one of claims 1 to 11, wherein a side of the display panel facing away from the light emitting surface is connected to a back plate of the backlight module.

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