CN114647117A

CN114647117A - Backlight module and display device

Info

Publication number: CN114647117A
Application number: CN202210544673.8A
Authority: CN
Inventors: 黄皓; 袁海江
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-06-21

Abstract

The application provides a backlight module and a display device. The backlight module comprises a back plate, a lamp panel, a light-transmitting support piece and an optical film group. The backplate includes bottom plate, lamp plate fixed connection bottom plate. The optical film group is located on one side, far away from the bottom plate, of the lamp panel. Printing opacity support piece includes the first face and the second face that carry on the back the mutually and set up, the play plain noodles of first face laminating lamp plate, second face laminating optical film group. The utility model provides a backlight unit sets up printing opacity support piece through going out the plain noodles at the lamp plate and optical film group between for printing opacity support piece not only can support optical film group, can also satisfy the mixed light distance requirement between lamp plate and the optical film group. The backlight module of this application supports display panel through setting up printing opacity support piece for whole backlight module no longer need set up the block rubber and supports optical film group. Promptly, through the setting of cancellation block rubber, reduced the holistic width of backlight unit for the backlight unit of this application can satisfy display device's narrow frame demand.

Description

Backlight module and display device

Technical Field

The invention relates to the field of liquid crystal display, in particular to a backlight module and a display device.

Background

With the development of display technology, people pursue higher and higher display effects, and further derive products with higher color gamut and brightness, such as Mini LED backlight products, Mini LED direct display products, Micro LED direct display products and the like. In which, the Mini LED backlight product has the least variation compared to the conventional LCD module, and thus is widely applied to high-end display products.

However, in high-end display products, especially in large-sized narrow bezel products, in order to support the optical film assembly, the Mini LED backlight product generally needs to set a rubber block to support the optical film assembly, so that the bezel of the conventional large-sized product needs to maintain more width to fit the width of the backlight module. Therefore, the supporting structure of the rubber block in the existing product enables the backlight module not to meet the narrow frame requirement of the product any more.

Disclosure of Invention

The embodiment of the application provides a backlight module and a display device comprising the backlight module, and the narrow frame of the backlight module is realized by changing the structure of the backlight module and canceling the design of a rubber block.

In a first aspect, an embodiment of the present application provides a backlight module. The backlight module comprises a back plate, a lamp panel, a light-transmitting support piece and an optical film group. The backplate includes bottom plate, lamp plate fixed connection bottom plate. The optical film group is located one side of the lamp panel far away from the bottom plate. Light transmission support piece is including carrying on the back first face and the second face that sets up mutually, the play plain noodles of first face laminating lamp plate, second face laminating optical film group. The light-transmitting support is used for supporting the optical film group.

In one possible implementation, the back plate includes a sidewall. The side wall is connected to the periphery of the bottom plate, and the side wall and the bottom plate enclose an accommodating space. The lamp panel and the light-transmitting support piece are located in the accommodating space. The lamp plate and the light-transmitting support piece are connected with the side wall, or the lamp plate and the light-transmitting support piece are in contact with the side wall, or a gap exists between the lamp plate and the light-transmitting support piece and the side wall.

In one possible implementation, the lamp panel includes a plurality of light sources and a circuit board. The circuit board is fixedly connected with the bottom plate. The light sources are fixed on the surface of one side, far away from the bottom plate, of the circuit board and are electrically connected with the circuit board. The light-transmitting support comprises an encapsulation layer and a support layer. The packaging layer is made of packaging glue, is fixedly connected with the circuit board and covers the light sources. The supporting layer is connected with the packaging layer and used for supporting the optical film group.

In one possible implementation, the supporting layer is an acrylic plate.

In one possible implementation, the optical film group includes a first film, a second film, and a third film. The second diaphragm is located between the first diaphragm and the third diaphragm. The first film is located between the light-transmitting support and the second film. The first diaphragm is provided with a first lug, the second diaphragm is provided with a second lug, and the third diaphragm is provided with a third lug. The width direction of the optical film group is a first direction. The first bump, the third bump and the second bump are arranged along a first direction. The first lug is matched with the second lug to limit the third diaphragm.

In a possible implementation manner, the second surface of the light-transmitting support member is provided with a first limiting block and a second limiting block. The first bump is provided with a first limit groove. The second bump is provided with a second limit groove. The first limiting block is arranged in the first limiting groove. The second limiting block is arranged in the second limiting groove.

In a possible implementation manner, the backlight module further includes an adhesive. The bonding glue is fixed on the second surface of the light-transmitting support piece and is positioned between the first limiting block and the second limiting block. The bonding glue comprises a first area, a third area and a second area which are sequentially connected along a first direction. The first bump is fixed in the first area, the third bump is fixed in the third area, and the second bump is fixed in the second area.

In a second aspect, an embodiment of the present application further provides a display device. The display device comprises a front frame, a display panel and the backlight module. The display panel is arranged on one side of the optical film group far away from the light-transmitting support. The display panel and the backlight module are positioned at the inner side of the front frame. The backlight module is connected with the front frame.

In one possible implementation, the plurality of light sources of the lamp panel are sub-millimeter light emitting diodes.

The utility model provides a backlight unit sets up printing opacity support piece through going out the plain noodles at the lamp plate and optical film group between for printing opacity support piece not only can support optical film group, can also satisfy the mixed light distance requirement between lamp plate and the optical film group. In other words, the backlight module supports the optical film group by arranging the light-transmitting support piece, so that the whole backlight module does not need to arrange the rubber block to support the optical film group any more. Promptly, through the setting of cancellation block rubber, reduced the holistic width of backlight unit for the block rubber of this application can satisfy the narrow frame demand of product.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

FIG. 1 is a schematic structural diagram of a conventional backlight module;

fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a partial cross-sectional structure of the display device shown in FIG. 2 in a direction A-A in a first embodiment;

FIG. 4 is a schematic view of a partial cross-sectional structure of a backlight module of the display device shown in FIG. 3 in a first embodiment;

FIG. 5 is a schematic view of a partial cross-sectional structure of the backlight module shown in FIG. 4 in a second embodiment;

FIG. 6 is a schematic view of a structure of a light-transmissive support of the backlight module shown in FIG. 5;

FIG. 7 is a schematic cross-sectional view of a portion of a lamp panel and a light-transmitting support of the backlight module shown in FIG. 5;

FIG. 8 is a schematic diagram of a detailed structure of a supporting layer of the light-transmissive supporting member of the backlight module shown in FIG. 4;

fig. 9 is an exploded view of the optical film assembly of the backlight module shown in fig. 4.

Description of the reference numerals

10-a display device; 1-a backlight module; 2-a display panel; 3-glue frame; 4-front frame; 5-a rubber block; 6-a lamp panel; 7-an optical film group; 8-a hollowed-out area; 1000-a display device; 100-a housing; 200-a display panel; 300-a backlight module; 110-front frame; 120-rear cover; 111-a body; 112-a bending part; 400-a printed circuit board; 500-a flexible circuit board; 310-a back plate; 320-a lamp panel; 330-a light transmissive support; 340-optical film group; 311-a backplane; 312-a sidewall; 313-an accommodating space; 210-viscose glue; 331-an encapsulation layer; 332-a support layer; 321-a light source; 322-a circuit board; 333-first side; 334-a second face; 341-a first membrane; 342-a second membrane; 343-a third membrane; 3411-a first bump; 3412-a first side; 3413-a first retaining groove; 3421-second bump; 3422-second edge; 3423-a second retaining groove; 3431-third bump; 335-a first stopper; 336-a second stopper; 350-adhesive glue; 351-a first region; 352-second zone; 353-third zone.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of the embodiments of the present application, it should be noted that the terms "mounted" and "connected" are to be interpreted broadly, unless explicitly stated or limited otherwise, and for example, "connected" may or may not be detachably connected; may be directly connected or indirectly connected through an intermediate. In the embodiments of the present application, the terms "first", "second", and "third" 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, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the embodiment of the present application, "and/or" is only one kind of association relationship describing an association object, and indicates that three types of relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It is to be understood that the specific embodiments described herein are merely illustrative of relevant embodiments and are not limiting of the embodiments. It should be noted that, for convenience of description, only the portions related to the embodiments are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a conventional display device 10.

In the conventional display device 10, in order to support the display panel 2, a rubber frame 3 is usually disposed in the backlight module 1 to support the display panel 2. The inner side edge of the rubber frame 3 is provided with a support boss, and the support boss is overlapped with the edge part of the display panel 2 so as to support the display panel 2. Generally, in order to better support the display panel 2, the width of the support boss of the bezel 3 needs to be at least 2 mm or more to ensure the support strength. The structural design is such that the front frame 4 of the display device 10 needs to be kept at least 4 mm or more in width to match the support of the rubber frame 3. Meanwhile, the support boss of the rubber frame 3 can also shield the display area around the display panel 2. Therefore, the backlight module 1 of the conventional display device 10 not only can not satisfy the narrow frame requirement of the product by setting the structural design of the plastic frame 3 supporting the display panel 2, but also can shield the display area around the display panel 2, thereby affecting the display effect.

In addition, traditional display device 10 still can set up rubber block 5 between the edge of lamp plate 6 and optical film group 7 and the backplate lateral wall owing to need guarantee the mixed light distance between lamp plate 6 and the optical film group 7, generally for rubber block 5 when supporting optical film group 7, can also make and have fretwork regional 8 between lamp plate 6 and the optical film group 7, satisfies the mixed light distance requirement between lamp plate 6 and the optical film group 7. However, the rubber block 5 is arranged, so that the width of the supporting boss of the rubber frame 3 needs to be larger than the width of the rubber block 5, and the display device 10 cannot reduce the width of the frame by reducing the size of the rubber frame 3. Also, once the conventional display apparatus 10 removes the arrangement of the bezel 3, the rubber block 5 cannot support the display panel 2 and the optical film group 7 at the same time.

In view of this, this application provides a display device, through getting rid of the block rubber and gluing the frame in the backlight unit, has changed backlight unit's overall structure for the display device of this application not only can satisfy the demand of narrow frame, can not shelter from the peripheral display area of display panel simultaneously, and the display effect is better.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a display device 1000 according to an embodiment of the present disclosure.

The display device 1000 may be a display device 1000 of an electronic apparatus having a display function, such as a computer, a mobile phone, a television, or a tablet. The embodiment shown in fig. 2 is specifically described by taking the display device 1000 as an example of a computer as the display device 1000.

The display device 1000 may include a housing 100, a display panel 200, and a backlight module 300. The case 100 may include a front frame 110 and a rear cover 120. The front frame 110 is connected around the periphery of the rear cover 120, and together enclose the inner cavity of the display device 1000. The display panel 200 and the backlight module 300 are both installed in the inner cavity of the display device 1000. The display panel 200 is fixed on the light-emitting side of the backlight module 300, and the backlight module 300 is used for providing a backlight source for the display panel 200.

In this embodiment, the backlight module 300 may be a direct type backlight module or a side type backlight module. The backlight module 300 is a direct-type backlight module.

Referring to fig. 3, fig. 3 is a schematic partial cross-sectional view of the display device 1000 shown in fig. 2 in a direction a-a according to the first embodiment.

In this embodiment, the front frame 110 may include a body 111 and a bending part 112 connected in sequence. The backlight module 300 is connected to the body 111 of the front frame 110. The bending portion 112 of the front frame 110 at least partially covers the edge portion of the display panel 200, and presses the display panel 200 toward the rear cover, so as to fix the display panel 200 and the backlight module 300 in the inner cavity of the display device 1000.

The display device 1000 may further include a printed circuit board 400 and a flexible circuit board 500. The display panel 200 is a cog (chip on glass) design, and the display panel 200 and the printed circuit board 400 are electrically connected through the flexible circuit board 500. In some embodiments, the printed circuit board 400 is folded and fixed on a surface of the backlight module 300 away from the display panel 200. The flexible circuit board 500 passes through the backlight module 300 and the gap between the display panel 200 and the front frame 110 to be electrically connected between the backlight module 300 and the display panel 200. Of course, in other embodiments, the printed circuit board 400 may be fixed to other portions of the display device 1000, which is not limited in this application.

In some embodiments, the material of the front frame 110 may be stainless steel. The front frame 110 may be formed by a bending process to form the body 111 and the bending portion 112, which are sequentially connected to each other, so as to enhance the overall strength of the front frame 110, avoid the situation that the display panel 200 cannot be pressed due to insufficient strength of the front frame 110, affect the structural stability of the whole display device 1000, and reduce the service life.

Referring to fig. 3 and 4 together, fig. 4 is a schematic partial cross-sectional view of the backlight module 300 of the display device 1000 shown in fig. 3 in the first embodiment.

In this embodiment, the backlight module 300 may include a back plate 310, a lamp panel 320, a light-transmitting support 330, and an optical film set 340. The back plate 310 includes a bottom plate 311 and a sidewall 312, and the sidewall 312 is connected to a periphery of the bottom plate 311. The side wall 312 and the bottom plate 311 enclose an accommodating space 313, and the lamp panel 320 and the light-transmitting support 330 are both located in the accommodating space 313. The inner side of the body 111 of the front frame 110 is connected to the sidewall 312 of the rear panel 310. The lamp panel 320 is fixedly connected to the bottom plate 311. The optical film set 340 is located on a side of the lamp panel 320 away from the bottom plate 311. The light-transmitting support 330 is sandwiched between the light-emitting surface of the lamp panel 320 and the optical film assembly 340. The display panel 200 is fixed on a side of the optical film assembly 340 away from the light-transmissive support 330. The display panel 200 may be fixed on a surface of the optical film set 340 away from the light-transmitting support 330 by the adhesive 210.

In some embodiments, the Adhesive 210 can be an Optical Clear Adhesive (OCA). Because the transparent optical cement has both viscosity and light transmittance, after the display panel 200 is fixed to the optical film set 340 through the optical cement, the portion between the display panel 200 and the optical film set 340, which is covered with the optical cement, does not shield light, so as to avoid shielding the display area and affecting the display effect of the product.

It can be understood that the conventional backlight module 1 often supports the display panel 2 by disposing the adhesive frame 3 (as shown in fig. 1), but this may make the overall width of the backlight module 1 larger, and thus make the width of the front frame 4 of the display device 10 using the backlight module 1 larger. Since the rubber frame 3 is generally clamped between the back plate of the backlight module 1 and the front frame 4 of the display device, even if the rubber frame 3 is made narrow enough, the width of the front frame 4 still includes the width of the rubber frame 3, which is not favorable for realizing the narrow frame of the whole display device. Meanwhile, the rubber frame 3 is provided with a protruding supporting platform, so that a part of the display area of the display panel 2 can be shielded, and the display effect of the product is influenced. The backlight module 300 of the present application sets the light-transmitting support 330 between the light-emitting surface of the lamp panel 320 and the optical film set 340, so that the light-transmitting support 330 can not only support the optical film set 340, but also support and fix the display panel 200 of the optical film set 340. In other words, the backlight module 300 of the present application supports the display panel 200 by disposing the light-transmitting supporting member 330, so that the whole backlight module 300 does not need to dispose a plastic frame to support the display panel 200. At this time, the inner side of the body 111 of the front frame 110 may be connected to the sidewall 312 of the back plate 310, and the width of the front frame 110 no longer includes the width of the plastic frame.

That is, under the condition of the same size of the display device 1000, the width of the front frame 110 of the display device 1000 using the backlight module 300 of the present application is smaller than that of the front frame of the display device using the conventional backlight module. The backlight module 300 of this application sets up printing opacity support piece 330 through the setting of canceling gluey frame, changes into and sets up between the play plain noodles of lamp plate 320 and optical film group 340, has reduced the holistic width of backlight module 300 for backlight module 300 of this application not only can satisfy display device 1000's narrow frame demand, can not shelter from the peripheral display area of display panel 200 simultaneously, and display effect is better.

In addition, since the backlight module 300 of the present application is a direct-type backlight, a certain distance needs to be maintained between the lamp panel 320 and the optical film set 340 to meet the requirement of the light mixing distance between the lamp panel 320 and the optical film set 340. Traditional backlight unit 1 often sets up rubber block 5 through edge and the backplate lateral wall at lamp plate 6 and optical film group 7 for rubber block 5 can also make to have fretwork area 8 between lamp plate 6 and the optical film group 7 when supporting optical film group 7, with the mixed light distance requirement (as shown in fig. 1) between satisfying lamp plate 6 and the optical film group 7. But traditional backlight unit 1 is owing to set up rubber block 5 for the holistic width increase of backlight unit 1 is unfavorable for realizing the narrow frame of product. Meanwhile, after the rubber frame 3 is removed from the conventional display device 10, the rubber block 5 cannot support the optical film assembly 7 and the display panel 2 above the optical film assembly at the same time. The strength of the optical film group 7 is not sufficient to support the display panel 2. Therefore, the backlight module 300 of the present application directly sets the light-transmitting support 330 between the lamp panel 320 and the optical film set 340, so that the light-transmitting support 330 can also keep a certain distance between the lamp panel 320 and the optical film set 340 while supporting the optical film set 340 and the display panel 200. At this time, the backlight module 300 can not only meet the requirement of the light mixing distance between the lamp panel 320 and the optical film set 340, but also the edge of the lamp panel 320 can be connected to the sidewall 312 of the backplane 310. In other words, when the backlight module 300 meets the requirement of the light mixing distance between the lamp panel 320 and the optical film set 340, no other structural members are arranged between the lamp panel 320 and the side wall 312 of the back plate 310, so that the overall width of the backlight module 300 is reduced, and the narrow frame of the product is facilitated to be realized.

It should be noted that there are many cases for the connection between the inner side of the body 111 of the front frame 110 and the sidewall 312 of the back plate 310. For example, the inner side of the body 111 and the sidewall 312 of the back plate 310 may be in contact connection, may have a gap, or may be in snap connection. In some embodiments, the width of the gap should be much smaller than the width of the glue frame. The present application does not limit the connection between the inner side of the body 111 of the front frame 110 and the sidewall 312 of the rear plate 310.

In some embodiments, the lamp panel 320 and the light transmissive support 330 are connected to the sidewall 312 of the back panel 310, wherein the connection may be a fixed connection, such as an adhesive connection. Alternatively, the lamp panel 320 and the light-transmitting support 330 are only in contact with the sidewall 312 of the back plate 310. Or, there is a gap between the lamp panel 320 and the light-transmitting support 330 and the sidewall 312 of the back panel 310, and the gap should be much smaller than the width of the rubber block.

In other embodiments, the optical film assembly 340 may also be connected to the sidewall 312 of the back plate 310, wherein the connection may also be a fixed connection, such as an adhesive connection. Or the optical film group 340 may be in contact with only the sidewall 312 of the back plate 310. Alternatively, the optical film assembly 340 may have a gap with the sidewall 312 of the back plate 310, and the gap is much smaller than the width of the rubber block. The application does not limit the connection condition between the lamp panel 320, the light-transmitting support 330, the optical film set 340 and the sidewall 312 of the back panel 310.

Referring to fig. 4, 5, 6 and 7, fig. 5 is a schematic partial cross-sectional view of the backlight module 300 shown in fig. 4 in a second embodiment. Fig. 6 is a schematic structural diagram of the light-transmitting support 330 of the backlight module 300 shown in fig. 5. Fig. 7 is a schematic partial cross-sectional view of the lamp panel 320 and the light-transmitting support 330 of the backlight module 300 shown in fig. 5.

In this embodiment, the light transmissive support 330 may include an encapsulation layer 331 and a support layer 332. The encapsulation layer 331 may be an encapsulation adhesive, the support layer 332 may be an acrylic plate, and the support layer 332 is connected to the encapsulation layer 331. The lamp panel 320 may include a plurality of light sources 321 and a circuit board 322. The circuit board 322 is fixedly connected to the bottom plate 311. The light sources 321 are fixed on the surface of the circuit board 322 at a side away from the bottom plate 311 and electrically connected to the circuit board 322. The package layer 331 is fixedly connected to the circuit board 322 and covers the plurality of light sources 321. The encapsulation layer 331 is used to protect the light source 321 of the lamp panel 320, and to enhance the structural strength of the lamp panel 320. Since the backlight module 300 in this embodiment is a direct-type backlight, the light sources 321 of the lamp panel 320 are arranged in an array on the surface of the circuit board 322. Each light source 321 is specifically a sub-millimeter light-emitting diode (Mini LED), and the size of the light-emitting chip of each light source 321 is between 50 micrometers and 200 micrometers. The transparent support 330 is connected to the encapsulation layer 331. The circuit board 322 of the lamp panel 320 is connected to the sidewall 312 of the back panel 310.

It can be understood that the light transmissive support 330 of the backlight module 300 of the present application includes a package layer 331 and a support layer 332, the package layer 331 is a package adhesive for protecting the plurality of light sources 321 of the lamp panel 320, and the support layer 332 is an acrylic plate having sufficient strength and supporting the optical film assembly 340 and the display panel 200 fixed above the optical film assembly 340. Meanwhile, since the supporting layer 332 has a certain thickness for the acrylic plate, the requirement of the light mixing distance between the lamp panel 320 and the optical film set 340 can also be met. Of course, in other embodiments, the encapsulation layer 331 may not be an encapsulation adhesive, and the encapsulation layer 331 may also be other material structures capable of providing protection or structural strength for the light source 321. The support layer 332 may not be an acrylic plate, and the support layer 332 may be made of other material having a certain strength and light transmittance. The present application does not limit the specific material structure of the encapsulating layer 331 and the supporting layer 332 of the transparent support 330.

In some embodiments, the connection between the encapsulation layer 331 and the support layer 332 may be a fixed connection. Wherein, the fixed connection can be in a connection mode such as bonding, clamping, buckling connection and the like. Of course, in other embodiments, the encapsulation layer 331 and the support layer 332 may also be an integrally formed structure (as shown in fig. 7). At this time, the encapsulation layer 331 and the support layer 332 may be formed by curing an encapsulation adhesive, and the thickness of the whole of the encapsulation layer 331 and the support layer 332 should meet the requirement of the light mixing distance between the lamp panel 320 and the optical film set 340. Or, the light-transmitting support 330 only includes the encapsulation layer 331, and the encapsulation layer 331 is encapsulation glue, and the thickness of the encapsulation glue is increased by integrally encapsulating the circuit board 322 of the lamp panel 320, so that the thickness of the encapsulation layer 331 can meet the requirement of the light mixing distance between the lamp panel 320 and the optical film set 340. The connection between the encapsulation layer 331 and the support layer 332 is not limited in this application.

Referring to fig. 4, 8 and 9, fig. 8 is a schematic structural diagram of a supporting layer 332 of a light-transmitting support 330 of the backlight module 300 shown in fig. 4. Fig. 9 is an exploded view of the optical film set 340 of the backlight module 300 shown in fig. 4.

In this embodiment, the light-transmitting support 330 may include a first surface 333 and a second surface 334 opposite to each other. The surface of the package layer 331 close to the lamp panel 320 forms a first surface 333, and the surface of the support layer 332 close to the optical film group 340 forms a second surface 334. The first surface 333 is attached to the light-emitting surface of the lamp panel 320, and the second surface 334 is attached to the optical film set 340.

The optical film group 340 may include a first film 341, a second film 342, and a third film 343. The second diaphragm 342 is located between the first diaphragm 341 and the third diaphragm 343. The first membrane 341 is located between the light transmissive support 330 and the second membrane 342. The first membrane 341 is provided with a first protrusion 3411, the second membrane 342 is provided with a second protrusion 3421, and the third membrane 343 is provided with a third protrusion 3431. The width direction of the optical film group 340 is a first direction (shown as X direction), and the first bump 3411, the third bump 3431 and the second bump 3421 are arranged along the first direction.

The side of the first protrusion 3411 close to the second protrusion 3421 is a first side 3412. The side of the second protrusion 3421 close to the first protrusion 3411 is a second side 3422. When the first membrane 341, the second membrane 342, and the third membrane 343 overlap, the third bump 3431 of the third membrane 343 is located between the first edge 3412 and the second edge 3422.

It can be understood that, in the optical film assembly 340 of the present application, the first protrusion 3411, the second protrusion 3421 and the third protrusion 3431 are respectively disposed on the first film 341, the second film 342 and the third film 343, and the first protrusion 3411, the third protrusion 3431 and the second protrusion 3421 are arranged along the first direction, so that the first protrusion 3411, the second protrusion 3421 and the third protrusion 3431 can be mutually limited, and thus, the films of the optical film assembly 340 can be aligned and arranged neatly.

In some embodiments, the second surface 334 of the light transmissive support 330 may have a first stopper 335 and a second stopper 336. The first protrusion 3411 may be provided with a first stopper groove 3413, and the second protrusion 3421 may be provided with a second stopper groove 3423. The first stopper 335 is installed in the first stopper groove 3413 to stop the first diaphragm 341. The second stopper 336 is installed in the second stopper groove 3423 to limit the second diaphragm 342.

In some embodiments, the backlight assembly 300 may further include an adhesive 350. The adhesive 350 is fixed to the second surface 334 of the transparent support 330 and located between the first stopper 335 and the second stopper 336. The adhesive 350 includes a first region 351, a third region 353, and a second region 352 connected in sequence in the first direction. The first protrusion 3411 is fixed to the first region 351, the third protrusion 3431 is fixed to the third region 353, and the second protrusion 3421 is fixed to the second region 352, so as to fix the first film 341, the third film 343, and the second film 342 to the second surface 334 of the light transmissive support 330.

It can be understood that, in the backlight module 300 of the present application, the first limiting block 335 is disposed on the second surface 334 of the light-transmitting support 330 to be matched with the first limiting groove 3413 of the first protrusion 3411, and the second limiting block 336 is disposed to be matched with the second limiting groove 3423 of the second protrusion 3421, so as to limit the entire optical film set 340 on the second surface 334 of the light-transmitting support 330. Meanwhile, an adhesive 350 is further disposed between the first limiting block 335 and the second limiting block 336 of the transparent support 330, so that the first film 341, the third film 343, and the second film 342 of the optical film group 340 can be fixed to the adhesive 350 through the first bump 3411, the third bump 3431, and the second bump 3421, respectively, and thus the entire optical film group 340 can be fixed to the transparent support 330, thereby preventing the product from rubbing between the films of the optical film group 340 and between the films and the transparent support 330 during transportation, which may damage the films and affect the optical performance of the product, and is beneficial to prolonging the service life of the product.

In some embodiments, adhesive 350 may be a double-sided adhesive. Since the width of the inactive panel area on the lower side of the display panel 200 is generally in the range of 2 mm to 3 mm, the width of the adhesive 350 is designed to be about 2 mm so as not to block the display area of the display panel 200 and affect the display effect. Certainly, in other embodiments, the adhesive 350 may also be a transparent optical adhesive, so as to avoid shielding the display area of the display panel 200 and affecting the display effect.

In some embodiments, the first film sheet 341, the second film sheet 342, and the third film sheet 343 of the optical film group 340 may be different optical films, respectively. For example, optical films having different properties, such as a diffusion film, a composite film, or a brightness enhancement film. Of course, in other embodiments, the optical film set 340 may further include a plurality of optical films, such as a fourth film, a fifth film, and the like, as required. The number and type of the film sheets in the optical film group 340 are not limited in this application.

The above embodiments and embodiments of the present invention are only examples and embodiments, and the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A backlight module comprises a back plate, a lamp plate and an optical film group, wherein the back plate comprises a bottom plate, the lamp plate is fixedly connected with the bottom plate, and the optical film group is positioned on one side of the lamp plate, which is far away from the bottom plate; its characterized in that, backlight unit still includes printing opacity support piece, printing opacity support piece is including the first face and the second face that set up back on the back, the laminating of first face the play plain noodles of lamp plate, the laminating of second face the optical film group, printing opacity support piece is used for supporting the optical film group.

2. The backlight module according to claim 1, wherein the back plate comprises a side wall, the side wall is connected to the periphery of the bottom plate, an accommodating space is defined by the side wall and the bottom plate, and the lamp panel and the light-transmitting support are located in the accommodating space;

the lamp plate reaches printing opacity support piece connects the lateral wall, perhaps the lamp plate reaches printing opacity support piece with the lateral wall contact, perhaps the lamp plate reaches printing opacity support piece with there is the clearance in the lateral wall.

3. The backlight module according to claim 2, wherein the lamp panel comprises a plurality of light sources and a circuit board, the circuit board is fixedly connected with the bottom plate, and the plurality of light sources are fixed on the surface of the circuit board on the side away from the bottom plate and electrically connected with the circuit board;

the light-transmitting support comprises an encapsulation layer and a support layer, wherein the encapsulation layer is fixedly connected with the circuit board and covers the light sources;

the supporting layer is connected with the packaging layer and used for supporting the optical film group.

4. The backlight module according to any of claims 1-3, wherein the set of optical films comprises a first film, a second film and a third film, the second film is located between the first film and the third film, the first film is located between the light transmissive support and the second film;

the first film is provided with a first lug, the second film is provided with a second lug, the third film is provided with a third lug, the width direction of the optical film group is a first direction, and the first lug, the third lug and the second lug are arranged along the first direction.

5. The backlight module according to claim 4, wherein the second surface of the light transmissive support has a first stopper and a second stopper, the first protrusion has a first stopper groove, and the second protrusion has a second stopper groove;

the first limiting block is arranged in the first limiting groove, and the second limiting block is arranged in the second limiting groove.

6. The backlight module according to claim 5, further comprising an adhesive, wherein the adhesive is fixed on the second surface of the light-transmissive support and located between the first stopper and the second stopper, and the adhesive comprises a first region, a third region and a second region sequentially connected along the first direction;

the first bump is fixed in the first area, the third bump is fixed in the third area, and the second bump is fixed in the second area.

7. The backlight module as claimed in claim 6, wherein the adhesive is a transparent optical adhesive.

8. A display device, comprising a front frame, a display panel and the backlight module of any one of claims 1 to 7, wherein the display panel is fixed on a side of the optical film assembly away from the light-transmissive support, the display panel and the backlight module are located on an inner side of the front frame, and the backlight module is connected to the front frame.

9. The display device of claim 8, wherein the plurality of light sources of the light panel are sub-millimeter light emitting diodes.