CN215416201U

CN215416201U - Display screen backlight module and display device

Info

Publication number: CN215416201U
Application number: CN202121518566.5U
Authority: CN
Inventors: 黄金煌; 姚志图; 罗增昌; 刘启玉; 叶海霞; 吴元会
Original assignee: WAI CHI OPTOELECTRONIC Ltd
Current assignee: WAI CHI OPTOELECTRONIC Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-01-04
Anticipated expiration: 2031-07-05

Abstract

The utility model provides a display screen backlight module which comprises a middle iron frame, a lower iron frame, a side-in light source and a light guide assembly, wherein the side-in light source is arranged on one side surface of the lower iron frame; the buckles on the middle iron frame are inserted into the corresponding square holes on the lower iron frame; still provide a display device, including foretell display screen backlight unit. The middle frame is fixed on the lower frame in a built-in mode, and through the structural design that the buckles are inserted and buckled with the square holes and the buckling holes and the lugs, the middle frame is stably fixed on the lower iron frame, meanwhile, the middle frame can be prevented from shaking and abnormal sound in the transportation process and the work process of products, and in addition, the design can also prevent the middle frame from generating undesirable phenomena such as external scratching deformation and the like.

Description

Display screen backlight module and display device

Technical Field

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

Background

With the continuous development of times and science and technology, display devices such as liquid crystal display screens are integrated into our lives, are widely applied to home theaters, office equipment and vehicle-mounted intelligent equipment, and the quality of the display devices needs to be further improved along with the pursuit of people for science and technology. Backlight unit is the important composition part of display screen, backlight unit among the current technical means is mostly by down the chase, the reflectance coating, the light guide plate, optics diaphragm group and the range upon range of setting of chase are formed, the multiple mode that adopts on the connection of each subassembly is fixed, but to terminal display screen or display screen of removal in the transportation, adopt present fixed mode, the display screen is probably at the in-process of jolting, the not hard up of chase and lower chase or the jump of other diaphragm subassemblies can take place, phenomenons such as aversion appear rocking, influence the display quality of backlight unit subassembly.

SUMMERY OF THE UTILITY MODEL

The utility model provides a display screen backlight module and a display device, aiming at solving the problems that the display screen is likely to have the phenomena of looseness between a middle iron frame and a lower iron frame or jumping, displacement and the like of other membrane components in the transportation bumping process by adopting the conventional fixing mode, and the display quality of the backlight module component is influenced by shaking abnormal sound. The utility model can ensure that each component in the backlight module is more firmly connected.

In order to solve the technical problems, the utility model adopts the technical scheme that: a display screen backlight module comprises a middle iron frame, a lower iron frame, a side-in light source and a light guide assembly, wherein the side-in light source is arranged on one side face of the lower iron frame; the buckles on the middle iron frame are inserted into the corresponding square holes on the lower iron frame.

Furthermore, still be equipped with on a lateral wall of well chase down the first bending structure that the chase direction was buckled, buckle a hole has still been seted up on the first bending structure, the chase down with a lateral wall that first bending structure is just right is equipped with the U-shaped recess that first bending structure matches, the lateral wall of chase is in buckle a hole's corresponding position be equipped with can with buckle a lug of hole mutual lock joint, first bending structure follows after the U-shaped recess stretches out buckle a hole lock joint on the lug.

Furthermore, the outer side of the first bending structure is attached with edge wrapping glue.

Furthermore, still be provided with a plurality of second bending structures on four lateral walls of well chase, this has the heavy groove that matches with the second bending structure in the position that corresponds of second bending structure on the lateral wall of lower chase.

Further, the light guide assembly comprises a reflecting film, a light guide plate and an optical film group which are sequentially stacked from the lower iron frame to the middle iron frame; one side of the reflecting film is bonded with the light guide plate through a double-sided adhesive tape, and the other side of the reflecting film is bonded with the lower iron frame through a fixing adhesive tape.

Further, the light guide plate is close to be equipped with 3 first reference columns on a side of chase down, the reflectance coating with first reference column is just right to be equipped with the via hole on the side, the chase lies in down first reference column just right position be equipped with the through-hole that first reference column matches, first reference column passes the via hole and the through-hole of corresponding position in proper order.

Further, the optical film group comprises a light-diffusing film, a lower light-adding film and a DBEF, which are sequentially stacked from the light guide plate to the middle iron frame.

Furthermore, the side edges of the light-diffusing film, the lower light-adding film and the DBEF are respectively provided with a diaphragm lug which can be inserted into the square hole.

Furthermore, the light guide plate is close to be equipped with 3 second reference columns on a side of well chase, on the membrane that loosens light, membrane and the DBEF down with on the side that the second reference column corresponds all offer the positioning groove that supplies the second reference column to pass.

Still provide a display device, including foretell display screen backlight unit.

Compared with the prior art, the beneficial effects are:

1. the middle frame is fixed on the lower frame in a built-in mode, so that the middle iron frame is stably fixed on the lower iron frame, the buckle is inserted into the square hole in the side wall of the lower iron frame, and the second bending structure on the side wall of the middle frame is bonded and fixed in the sinking groove in the side wall of the lower iron frame through the double faced adhesive tape, so that the effect of fixing the built-in middle iron frame on the lower iron frame is achieved; the first bending structure on the side wall of the middle iron frame is wrapped in the U-shaped groove on the side wall of the lower iron frame and is buckled on the corresponding lug on the side wall of the lower iron frame through the buckling hole; thereby also can avoid the product to appear the center in transportation and work and rock abnormal sound when realizing that the center is stably fixed in down on the iron frame, in addition design like this can also avoid the center to appear taking off bad phenomena such as deformation outward.

2. According to the light guide plate, the first positioning columns of the light guide plate are inserted into the through holes of the lower iron frame, then the light guide plate and the reflecting film are bonded together to form a whole through the light guide plate fixing double-sided adhesive tape, and finally the light guide plate is fixed in the lower iron frame through the reflecting film fixing adhesive tape; the light guide plate is limited and fixed in the x/y/z direction, and the phenomenon that the light guide plate is loosened and jumped off in the transportation process, the work process and the three comprehensive experiments of the product is avoided; meanwhile, the limit fixation of the anti-loosening silica gel is omitted, the assembly is simple, the process can be simplified, and the cost is reduced.

3. According to the utility model, the diaphragm lug of the optical diaphragm is inserted into the square hole on the side surface of the lower iron frame to prevent the diaphragm from jumping off in the Z direction, and the diaphragm positioning groove is sleeved on the light guide plate positioning column to limit and fix the x/y/Z direction of the optical diaphragm, and the surface is additionally provided with single-sided adhesive for bonding and fixing to prevent the diaphragm from shifting, buckling and jumping off and shaking abnormal sound in the transportation process; in addition, the diaphragm lugs designed on the optical diaphragm are inserted into the square holes in the side face of the lower iron frame, so that the deformation of the middle frame caused by the fact that the diaphragm is jacked to the middle frame in the transportation process and the three comprehensive experiments of the product can be avoided.

Drawings

Fig. 1 is an exploded view of example 1.

Fig. 2 is a schematic view of the assembly of the middle iron frame and the lower iron frame in example 1.

Fig. 3 is a schematic view of the structure of the reflection film and the light guide plate when they are assembled in embodiment 1.

FIG. 4 is a schematic view of a side surface of the light guide plate having the first positioning posts.

FIG. 5 is a schematic view of an optical diaphragm assembly in example 1, as assembled.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The technical scheme of the utility model is further described in detail by the following specific embodiments in combination with the attached drawings:

example 1

As shown in fig. 1, a display screen backlight module is provided, which includes a middle iron frame 7, a lower iron frame 1, a side-in light source 8 and a light guide assembly 10, wherein the side-in light source 8 is disposed on one side surface of the lower iron frame 1, the light guide assembly 10 is fixed between the middle iron frame 7 and the lower iron frame 1, as shown in fig. 2, a plurality of outwardly protruding buckles 11 are disposed on the side wall of the middle iron frame 7, and square holes 12 matched with the buckles 11 are disposed at positions of the side wall of the lower iron frame 1 opposite to the buckles 11; the buckle 11 on the middle iron frame 7 is inserted in the corresponding square hole 12 on the lower iron frame 1.

A first bending structure 13 which is bent towards the lower iron frame 1 is further arranged on one side wall of the middle iron frame 7, a buckling hole 14 is further formed in the first bending structure 13, a U-shaped groove 15 matched with the first bending structure 13 is formed in one side wall, opposite to the first bending structure 13, of the lower iron frame 1, a protruding block 16 capable of being buckled with the buckling hole 14 is arranged at the position, corresponding to the buckling hole 14, of the side wall of the lower iron frame 1, and the first bending structure 13 extends out of the U-shaped groove 15 and then is buckled on the protruding block 16 through the buckling hole 14; the outer side of the first bending structure 13 is also attached with an edge covering glue 9.

Thus, generally, the side walls of the short sides of the middle iron frame 7 are respectively provided with 2 buckles 11 (the number of which can be adjusted), the side wall of one long side is respectively provided with 2 buckles 11, and the side wall of the other long side is provided with 3 buckles 11 (the number of which can be adjusted); the buckle 11 is inserted into the square hole 12 on the side wall of the lower iron frame 1 to play a role in limiting and fixing the middle iron frame in the direction 7 z; a local first bending structure 13 is also arranged on the side wall of the middle iron frame 7, and a buckling hole 14 is arranged on the first bending structure 13 and is buckled on a corresponding lug 16 on the side wall of the lower iron frame 1; meanwhile, an edge covering adhesive 9 is attached to bond and fix the middle frame and the lower frame together. And a U-shaped groove 15 which is matched with the bending structure on the side wall of the middle iron frame 7 is arranged on the side wall of the lower iron frame 1 and is used for accommodating the first bending structure 13.

A plurality of second bending structures 17 are further arranged on the four side walls of the middle iron frame 7, and sinking grooves 18 matched with the second bending structures 17 are formed in the positions, corresponding to the second bending structures 17, on the side walls of the lower iron frame 1. In this way, generally, 4Z-shaped second bending structures 17 (the number of which is adjustable) are respectively arranged on the long-direction side wall of the middle iron frame 7, and 3Z-shaped second bending structures 17 (the number of which is adjustable) are respectively arranged on the short-direction side wall of the middle iron frame 7, and the middle iron frame 7 is fixed in the sinking groove 18 on the side wall of the iron frame by adhering a middle iron frame fixing double-faced adhesive tape 19 at the contact position of the bending structures and the lower iron frame 1; so as to play a role of internally fixing the middle iron frame 7 on the lower iron frame 1.

The four side walls of the middle iron frame 7 are provided with a plurality of buckles 11, the buckles 11 are inserted into square holes 12 on the side wall of the lower iron frame 1 to play a role of limiting and fixing the middle iron frame 7 in the Z direction, meanwhile, Z-shaped second bending structures 17 on the side wall of the middle iron frame 7 are bonded and fixed in sinking grooves 18 on the side wall of the lower iron frame 1 through a middle iron frame fixing double-sided adhesive tape 19 of the middle iron frame 7 to play a role of fixing the middle iron frame 7 inside the lower iron frame 1 and a role of wrapping first bending structures 13 on the side wall of the middle iron frame 7 outside U-shaped grooves 15 on the side wall of the lower iron frame 1, and are buckled on corresponding convex blocks 16 on the side wall of the lower iron frame 1 through the buckles 11; thereby iron frame 7 is stably fixed in down on the iron frame 1 in realizing, avoids the product to appear that the center rocks the abnormal sound in transportation and work.

The middle iron frame 7 in the embodiment is fixed on the lower iron frame 1 in a built-in mode, so that the middle iron frame 7 is stably fixed on the lower iron frame 1, and the buckle 11 is inserted into the square hole 12 in the side wall of the lower iron frame to play a role in limiting and fixing the middle iron frame 7 in the z direction; the second bending structure 17 on the side wall of the middle iron frame 7 is fixedly bonded in the sinking groove 18 on the side wall of the lower iron frame 1 through a double-sided adhesive tape 19, so that the effect of internally fixing the middle iron frame 7 on the lower iron frame 1 is achieved; the first bending structure 13 on the side wall of the middle iron frame 7 is wrapped in the U-shaped groove 15 on the side wall of the lower iron frame and is buckled on the corresponding lug 16 on the side wall of the lower iron frame through the buckling hole 14; thereby also can avoid the product to appear the center in transportation and work and rock abnormal sound when iron frame 7 is stably fixed in down on iron frame 1 in realizing, in addition the design can also avoid in iron frame 7 appear taking off bad phenomenon such as deformation outward.

As shown in fig. 5, the light guide assembly 10 includes a reflective film 2, a light guide plate 3, and an optical film group, which are stacked in this order from a lower bezel 1 to a middle bezel 7; as shown in fig. 3, one surface of the reflective film 2 is bonded to the light guide plate 3 by a reflective film double-sided tape 22, and the other surface is bonded to the lower bezel 1 by a reflective film fixing tape 20. The structure of the light guide assembly 10 in this embodiment is the same as the light guide assembly 10 in a general backlight module, for example, an outer protective film 61 is provided above the light intensifying film group, and a handle 62 is provided on the outer protective film; the conventional bonding and arrangement of the conventional outer covering glue 24 and the like on the outer wall of the lower iron frame 1 are not described in detail.

As shown in fig. 3 and 4, 3 first positioning posts 31 are disposed on a side of the light guide plate 3 close to a side of the lower iron frame 1, a through hole 21 is disposed on a side of the reflective film 2 opposite to the first positioning post 31, a through hole 33 matched with the first positioning post 31 is disposed at a position of the lower iron frame 1 opposite to the first positioning post 31, and the first positioning post 31 sequentially passes through the through hole 21 and the through hole 33 at a corresponding position.

The back of the light guide plate 3 is provided with 3 first positioning columns 31 with different shapes on the side edge close to the lamp strip edge (side-in light source 8), and the positioning columns are inserted into the through holes 33 on the lower iron frame 1 and play a role in limiting and fixing the light guide plate 3 in the x/y direction to avoid the phenomenon that the light guide plate 3 is shifted in the x and y directions. The first positioning column 31 on the back of the light guide plate 3 is inserted into the through hole of the lower iron frame 1 and the double-sided adhesive tape 22 fixed on the light guide plate 3, the light guide plate 3 and the reflective film 2 are bonded together to form a whole, and then the whole is fixed in the lower iron frame 1 through the reflective film fixing adhesive 22; the light guide plate 3 is limited and fixed in the x/y/z direction, and the phenomenon that the light guide plate 3 is loosened and jumped off in the transportation process, the work process and the three comprehensive experiments of the product is avoided; meanwhile, the limit fixation of the anti-loosening silica gel is omitted, the process is simplified, and the assembly is simple.

The optical diaphragm group comprises a light-diffusing film 4, a lower brightness enhancement film 6 and a DBEF6 (both optical diaphragms) which are sequentially stacked from the light guide plate 3 to the middle iron frame 7; the side edges of the light-diffusing film 4, the lower light-adding film 5 and the DBEF6 are all provided with film lugs 101 which can be inserted into the square holes 12; the diaphragm lug 101 of the uppermost DBEF6 is also coated with scratch-resistant glue 102; and a single-sided adhesive 71 is attached to the middle of the upper optical film DBEF to fix the film DBEF and the lower iron frame 1 together, so as to limit the movement of the film in the z direction. A side edge of the top surface of the light guide plate 3 is provided with 3 second positioning columns 32, and the side edges of the light-diffusing film 4, the lower light-adding film 5 and the DBEF6 corresponding to the second positioning columns 32 are all provided with positioning grooves 103 for the second positioning columns 32 to pass through.

The side of each optical film pair is provided with 3 positioning grooves 103, and the positioning grooves 103 are sleeved on the second positioning columns 32 of the light guide plate 3 to limit and fix the x/y directions of the optical films. The side of the optical film is also provided with 3 lugs 101, and the optical film lugs 101 are inserted into square holes 12 on the side wall of the lower iron frame 1, so that the film can be prevented from jumping off in the Z direction. The front surface of the light guide plate 3 is further provided with 3 second positioning columns 32 for limiting and fixing the optical film. In the fixing of the optical film group, namely the optical film lug 101 is inserted into the square hole 12 on the side surface of the lower iron frame 1 to prevent the film from jumping off in the Z direction, the film positioning groove 103 is sleeved on the second positioning column 32 of the light guide plate 3 to limit and fix the x/y/Z direction of the optical film, and the surface is further provided with the single-sided adhesive 71 for bonding and fixing to prevent the film from shifting, buckling and jumping off and shaking abnormal sound in the transportation process; in addition, the diaphragm lug 101 is designed on the optical diaphragm to be inserted into the side hole of the lower iron frame 1, so that the deformation of the middle frame caused by the fact that the diaphragm is jacked to the middle frame in the transportation process and the three comprehensive experiments of products can be avoided.

Example 2

The present embodiment provides a display device, including the display screen backlight module of embodiment 1.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A display screen backlight module comprises a middle iron frame (7), a lower iron frame (1), a side-in light source (8) and a light guide assembly (10), wherein the side-in light source (8) is arranged on one side face of the lower iron frame (1), and the light guide assembly (10) is fixed between the middle iron frame (7) and the lower iron frame (1), and is characterized in that a plurality of outwards-protruding buckles (11) are arranged on the side wall of the middle iron frame (7), and square holes (12) matched with the buckles (11) are arranged at positions, right opposite to the buckles (11), of the side wall of the lower iron frame (1); the buckle (11) on the middle iron frame (7) is inserted into the corresponding square hole (12) on the lower iron frame (1).

2. The display screen backlight module according to claim 1, wherein a side wall of the middle bezel (7) is further provided with a first bending structure (13) bending toward the lower bezel (1), the first bending structure (13) is further provided with a buckling hole (14), a side wall of the lower bezel (1) opposite to the first bending structure (13) is provided with a U-shaped groove (15) matched with the first bending structure (13), a corresponding position of the buckling hole (14) on the side wall of the lower bezel (1) is provided with a bump (16) capable of being buckled with the buckling hole (14), and the first bending structure (13) is buckled on the bump (16) through the buckling hole (14) after extending out of the U-shaped groove (15).

3. The backlight module of claim 2, wherein an edge covering adhesive (9) is further attached to an outer side of the first bending structure (13).

4. The display screen backlight module according to claim 2, wherein a plurality of second bending structures (17) are further disposed on each of four side walls of the middle iron frame (7), and a sinking groove (18) matched with the second bending structure (17) is formed in a position, corresponding to the second bending structure (17), on the side wall of the lower iron frame (1).

5. The display screen backlight module according to claim 1, wherein the light guide assembly (10) comprises a reflective film (2), a light guide plate (3) and an optical film group, which are sequentially stacked from the lower iron frame (1) to the middle iron frame (7); one side of the reflecting film (2) is bonded with the light guide plate (3) through a reflecting film double-faced adhesive tape (22), and the other side of the reflecting film (2) is bonded with the lower iron frame (1) through a reflecting film fixing adhesive tape (20).

6. The display screen backlight module according to claim 5, wherein 3 first positioning posts (31) are disposed on one side of the light guide plate (3) close to the side of the lower bezel (1), the through holes (21) are disposed on the side of the reflective film (2) opposite to the first positioning posts (31), the through holes (33) matched with the first positioning posts (31) are disposed at the position of the lower bezel (1) opposite to the first positioning posts (31), and the first positioning posts (31) sequentially pass through the through holes (21) and the through holes (33) at the corresponding positions.

7. The backlight module of claim 5, wherein the optical film assembly comprises a light-diffusing film (4), a lower light-adding film (5) and a DBEF (6) stacked in sequence from the light guide plate (3) to the middle bezel (7).

8. The backlight module of claim 7, wherein the side edges of the light-diffusing film (4), the lower light-adding film (5) and the DBEF (6) are provided with film lugs (101) which can be inserted into the square holes (12).

9. The backlight module for display screen according to claim 7, wherein 3 second positioning pillars (32) are disposed on one side of the light guide plate (3) close to one side of the middle iron frame (7), and positioning grooves (103) for the second positioning pillars (32) to pass through are disposed on the side of the light diffusing film (4), the lower light intensifying film (5) and the DBEF (6) corresponding to the second positioning pillars (32).

10. A display device, comprising the display screen backlight module of any one of claims 1 to 9.