CN217739674U

CN217739674U - Backlight module and display device thereof

Info

Publication number: CN217739674U
Application number: CN202221189364.5U
Authority: CN
Inventors: 刘三妹; 姚君乐; 罗增昌; 叶海霞; 刘启玉; 吴元会
Original assignee: Huizhou Wai Chi Electronics Co ltd
Current assignee: Huizhou Wai Chi Electronics Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-11-04
Anticipated expiration: 2032-05-18

Abstract

The utility model relates to a backlight module and display device thereof, backlight unit, include: the backlight module comprises a first frame body, an optical membrane, a light guide plate, a reflecting film, a second frame body, a retaining wall, a plurality of buffer foam and a glass membrane; the second frame body is provided with an accommodating cavity, and the reflecting film, the light guide plate and the optical diaphragm are sequentially stacked in the accommodating cavity; the first frame body is detachably connected with the second frame body, the first frame body is provided with a bearing part, and a first surface of the bearing part is abutted against one surface of the optical diaphragm; the retaining wall is connected with the inner side surface of the first frame body, the first end of the retaining wall is abutted against the second surface of the bearing part, one side of each buffering foam is abutted against one side of the retaining wall, the first surface of each buffering foam is connected with the second surface of the bearing part, the second surface of each buffering foam is provided with an abutting groove, and the glass membrane is abutted against the side wall of each abutting groove. Effectively promoted structural stability, avoided backlight unit the phenomenon that the glass diaphragm damaged to appear in the use to guarantee the good display effect of product.

Description

Backlight module and display device thereof

Technical Field

The utility model relates to a liquid crystal display device technical field, in particular to backlight module and display device thereof.

Background

The backlight module is an important component of the liquid crystal display, and the mechanism of the backlight module is that white light is provided for the liquid crystal panel from the back of the liquid crystal panel of the liquid crystal display, and the white light is processed by the liquid crystal panel to realize colorful display pictures. However, the display effect of the display device is often not good due to poor structural stability of the current backlight module.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a backlight module and a display device thereof.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a backlight module includes: the light guide plate comprises a first frame body, an optical diaphragm, a light guide plate, a reflecting film, a second frame body, a retaining wall, a plurality of buffer foam and a glass diaphragm;

the second frame body is provided with an accommodating cavity, and the reflecting film, the light guide plate and the optical diaphragm are sequentially stacked in the accommodating cavity;

the first frame body is detachably connected with the second frame body, the first frame body is provided with a bearing part, and a first surface of the bearing part is abutted against one surface of the optical diaphragm;

the barricade with the inboard surface of first framework is connected, the first end of barricade with the second face butt of bearing part, each the cotton one side of buffering bubble respectively with the mutual butt in one side of barricade, each the cotton first face of buffering bubble with the second face of bearing part is connected, each the butt joint groove has been seted up to the cotton second face of buffering bubble, the glass diaphragm with each the mutual butt of lateral wall in butt joint groove.

In one embodiment, the first frame body is provided with a plurality of clamping grooves, each clamping groove is arranged to penetrate through the inner side surface and the outer side surface of the first frame body, the outer side surface of the second frame body is provided with a plurality of clamping blocks, and each clamping block is inserted into each clamping groove in a one-to-one correspondence manner.

In one embodiment, the cross-sectional area of each clamping block is gradually increased from one end close to the retaining wall to one end far away from the retaining wall.

In an embodiment, the second frame body is provided with a plurality of limiting through holes, the light guide plate is provided with a plurality of limiting blocks, and the limiting blocks are respectively inserted into the limiting through holes in a one-to-one correspondence manner.

In one embodiment, the retaining wall is integrally formed with the first frame.

In one embodiment, the optical film is provided with a limiting clamping lug, the first surface of the light guide plate is provided with a limiting boss, and the limiting boss is inserted into the limiting clamping lug.

In one embodiment, the optical film comprises a peep-proof film, an upper bright enhancement film, a middle bright enhancement film and a light diffusion film, wherein the limiting clamping lugs comprise a first limiting clamping lug, a second limiting clamping lug, a third limiting clamping lug and a fourth limiting clamping lug, the first limiting clamping lug is arranged on the peep-proof film, the second limiting clamping lug is arranged on the upper bright enhancement film, the third limiting clamping lug is arranged on the middle bright enhancement film, the fourth limiting clamping lug is arranged on the light diffusion film, and the limiting bosses are respectively and sequentially inserted into the fourth limiting clamping lug, the third limiting clamping lug, the second limiting clamping lug and the first limiting clamping lug.

In one embodiment, the first surface of the light guide plate is provided with an adhesive layer.

In an embodiment, the second frame body is provided with a plurality of positioning holes, the second surface of the light guide plate is provided with a plurality of positioning pillars, and the positioning pillars are respectively inserted into the positioning holes in a one-to-one correspondence manner.

A display device comprises the backlight module in any embodiment.

The utility model has the advantages that: the utility model provides a pair of backlight module is through setting gradually reflectance coating, light guide plate and optics diaphragm in the second frame, and through the supporting part and the optics diaphragm butt in the first frame for reflectance coating, light guide plate and optics diaphragm are fixed in the second frame. And through be provided with the barricade in first framework, be provided with a plurality of buffering bubble cotton on the supporting part in the first framework, and each buffering bubble cotton one side of keeping away from the supporting part has seted up the butt joint groove, and at this moment, the barricade plays the support fixed action to buffering bubble cotton. When the glass diaphragm was installed in first framework, the peripheral mutual butt in each butt groove of lateral wall of glass diaphragm, each buffering bubble cotton plays the effect of buffering and protection to the glass diaphragm, like this, has effectively promoted structural stability, avoids backlight unit the phenomenon that the glass diaphragm damaged to appear in the use to guarantee the good display effect of product.

Drawings

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment;

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

FIG. 3 is an exploded view of a backlight module according to an embodiment;

FIG. 4 is an exploded view of a portion of a backlight module according to an embodiment;

FIG. 5 is a partial enlarged view of FIG. 4 at B;

fig. 6 is an exploded view of a portion of a backlight module according to an embodiment.

In the drawings, 10, a backlight module; 100. a first frame body; 110. a bearing part; 120. retaining walls; 130. buffering foam; 140. a clamping groove; 200. an optical film; 210. a privacy film; 220. an upper brightness enhancement film; 230. a middle bright enhancement film; 240. a light-diffusing film; 250. limiting clamping lugs; 251. a first limit lug; 252. a second limit clamp lug; 253. a third limiting clamping lug; 254. a fourth limit lug; 300. a light guide plate; 310. a limiting boss, 320 and a positioning column; 330. a limiting block; 400. a reflective film; 500. a second frame body; 510. an accommodating chamber; 520. a clamping block; 530. positioning holes; 600. a glass membrane.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The following will combine the drawings of the embodiments of the present invention to further describe the technical solution of the present invention, and the present invention is not limited to the following specific embodiments.

It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar parts. In the description of the present invention, it should be understood that if there are the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limiting the patent, and those skilled in the art can understand the specific meaning of the terms according to the specific situation.

In one embodiment, as shown in fig. 1 to 6, a backlight module 10 includes: the backlight module comprises a first frame body 100, an optical film 200, a light guide plate 300, a reflecting film 400, a second frame body 500, a retaining wall 120, a plurality of buffer foam 130 and a glass film 600; the second frame 500 is provided with a receiving cavity 510, and the reflective film 400, the light guide plate 300 and the optical film 200 are sequentially stacked in the receiving cavity 510; the first frame 100 is detachably connected to the second frame 500, the first frame 100 is provided with a bearing portion 110, and a first surface of the bearing portion 110 abuts against one surface of the optical film 200; the retaining wall 120 is connected to the inner side surface of the first frame 100, the first end of the retaining wall 120 is abutted to the second surface of the bearing part 110, one side of each of the cushion foams 130 is abutted to one side of the retaining wall 120, the first surface of each of the cushion foams 130 is connected to the second surface of the bearing part 110, the second surface of each of the cushion foams 130 is provided with an abutting groove, and the glass membrane 600 is abutted to the side wall of each of the abutting grooves.

In this embodiment, a light bar is disposed on the inner side surface of the second frame 500, when the light bar irradiates light onto the light guide plate 300, the light guide plate 300 is used for scattering and conducting the light irradiated by the light bar, the reflective film 400 is used for reflecting the light scattered by the light guide plate 300 onto the optical film 200, the optical film 200 is used for making the light reflected onto the optical film 200 more uniform, and the backlight module 10 can provide white light for the liquid crystal panel through the cooperation of the reflective film 400, the light guide plate 300 and the optical film 200. In the present embodiment, the second housing 500, the reflective film 400, the light guide plate 300, and the optical film 200 are connected by adhesive, the first housing 100 abuts against the light guide plate 300, and the first housing 100 is connected to the second housing 500. The retaining wall 120 is annular, the retaining wall 120 is used for supporting the buffering foam 130, the first surface of each buffering foam 130 is connected with the second surface of the bearing part 110 through an adhesive, the second surface of each buffering foam 130 is provided with a butt-joint groove, so that each buffering foam 130 is L-shaped, and each buffering foam 130 is used for protecting the periphery of the glass membrane 600. Wherein, the material of each buffering foam 130 is ethylene-vinyl acetate copolymer, and the number of each buffering foam 130 is four. The periphery of the glass membrane 600 is connected to the side wall of each abutting groove by adhesive, and the glass membrane 600 is attached to the first frame 100.

It should be noted that the reflective film 400, the light guide plate 300, and the optical film 200 are sequentially disposed in the second frame 500, and the supporting portion 110 of the first frame 100 abuts against the optical film 200, so that the reflective film 400, the light guide plate 300, and the optical film 200 are fixed in the second frame 500. The retaining wall 120 is disposed in the first frame 100, the plurality of buffer foam 130 are disposed on the supporting portion 110 in the first frame 100, and a contact groove is disposed on a surface of each buffer foam 130 away from the supporting portion 110, at this time, the retaining wall 120 supports and fixes the buffer foam 130. When the glass diaphragm is installed on first framework 100, the peripheral mutual butt in each butt groove of lateral wall of glass diaphragm 600, each buffering bubble cotton 130 plays the effect of buffering and protection to the glass diaphragm, like this, has effectively promoted structural stability, avoids the phenomenon that glass diaphragm 600 damaged to appear in backlight unit 10 in the use to guarantee the good display effect of product.

In order to facilitate the detachable connection of the first frame body 100 and the second frame body 500, in an embodiment, as shown in fig. 6, the first frame body 100 is provided with a plurality of clamping grooves 140, each of the first clamping grooves 140 is disposed to penetrate through the inner and outer side surfaces of the first frame body 100, the outer side surface of the second frame body 500 is provided with a plurality of clamping blocks 520, and each of the clamping blocks 520 is respectively inserted into each of the clamping grooves 140 in a one-to-one correspondence manner. Specifically, when the first frame body 100 needs to be installed in the second frame body 500, a pushing force is applied to the first frame body 100, so that the clamping blocks 520 are inserted into the clamping grooves 140 in a one-to-one correspondence manner, and the first frame body 100 and the second frame body 500 can be connected to each other; when the first frame body 100 needs to be detached from the second frame body 500, a pulling force is applied to the first frame body 100, so that each of the clamping blocks 520 is separated from the corresponding clamping groove 140, and at this time, the first frame body 100 can be separated from the second frame body 500.

In order to facilitate the installation of the first frame body 100 and the second frame body 500, in one embodiment, the cross-sectional area of each of the clamping blocks 520 is gradually increased from the end close to the retaining wall 120 to the end far away from the retaining wall 120. Specifically, the end of each clamping block 520 close to the retaining wall 120 is set as a first end, the end of each clamping block 520 far away from the retaining wall 120 is set as a second end, the cross-sectional area of the first end of each clamping block 520 is smaller than that of the second end, so that the process of each clamping block 520 entering the corresponding clamping groove 140 is more convenient, the second end of each clamping block 520 can be clamped with the side wall of each clamping groove 140, and each clamping block 520 is prevented from being separated from the corresponding clamping groove 140, that is, when each clamping block 520 can be limited, the first frame body 100 can be conveniently installed in the second frame body 500.

In order to limit the displacement of the light guide plate 300, in an embodiment, as shown in fig. 4 to fig. 6, the second frame body 500 is provided with a plurality of limiting through holes, the light guide plate 300 is provided with a plurality of limiting blocks 330, and the limiting blocks 330 are respectively inserted into the limiting through holes in a one-to-one correspondence manner. Specifically, a plurality of limiting through holes are formed in the side wall of each accommodating cavity 510, each limiting through hole penetrates through the inner and outer side surfaces of the second frame body 500, a plurality of limiting blocks 330 are arranged on one side of the light guide plate 300, the shape of each limiting block 330 is matched with that of each limiting through hole, when the light guide plate 300 is installed in the second frame body 500, each limiting block 330 is inserted into each limiting through hole, a limiting effect can be exerted on the light guide plate 300, longitudinal movement of the light guide plate 300 is effectively avoided, and the structural stability of the backlight module 10 is improved.

In order to improve the sealing performance of the backlight module, in one embodiment, the retaining wall is integrally disposed with the first frame. Specifically, barricade and first framework are made through the tensile processing of punching press, and through setting up barricade and first framework integrated into one piece for there is not the clearance between barricade and first framework, make backlight unit's intensity higher, the fastness is better, the dirt resistance is good and the leakproofness is better, and the barricade can be better to the cotton supporting role that plays of buffering bubble, make the buffering bubble cotton can carry out spacing fixed and peripheral protection to the glass die better.

In order to limit the movement of the optical film 200, in one embodiment, as shown in fig. 3 to 5, the optical film 200 is provided with a limiting lug 250, and the first surface of the light guide plate 300 is provided with a limiting boss 310, wherein the limiting boss 310 is inserted into the limiting lug 250. Specifically, cross to be provided with spacing card ear 250 on optical film 200, be provided with spacing boss 310 on the light guide plate 300, when inserting spacing boss 310 and locating in spacing card ear 250, optical film 200 and light guide plate 300 joint to make optical film 200 receive limiting displacement, at this moment, optical film 200 is difficult for shifting, avoids backlight unit 10 to be poor because of fixed effect causes the product display effect.

In order to facilitate the limiting of the optical film 200, in an embodiment, as shown in fig. 3 to 5, the optical film 200 includes a peep-proof film 210, an upper light-adding film 220, a middle light-adding film 230, and a light-diffusing film 240, the limiting tab 250 includes a first limiting tab 251, a second limiting tab 252, a third limiting tab 253, and a fourth limiting tab 254, the first limiting tab 251 is disposed on the peep-proof film 210, the second limiting tab 252 is disposed on the upper light-adding film 220, the third limiting tab 253 is disposed on the middle light-adding film 230, the fourth limiting tab 254 is disposed on the light-diffusing film 240, and the limiting bosses 310 are respectively inserted in the fourth limiting tab 254, the third limiting tab 253, the second limiting tab 252, and the first limiting tab 251 in sequence. Specifically, the privacy film 210 is used to control the angle of light, that is, the privacy film 210 is used to change the wide viewing angle of the screen to a narrow viewing angle, the upper and middle

brightness enhancement films

220 and 230 are used to concentrate light to a specific direction, and the light diffusion film 240 is used to diffuse light. First spacing calorie of ear 251, the spacing calorie of ear 252 of second, pass through the fixed glue bonding of diaphragm between the spacing calorie of ear 253 of third and the spacing calorie of ear 254 of fourth, and spacing boss 310 inserts respectively in proper order and locates the spacing calorie of ear 254 of fourth, the spacing calorie of ear 253 of third, in the spacing calorie of ear 252 of second and the spacing calorie of ear 251 of first, when using, effectively avoided peep-proof membrane 210, go up the membrane 220 that adds lustre to, in add lustre to each other displacement between membrane 230 and the membrane 240 that looses lustre to, make spacing boss 310 can limit the displacement of optical film 200.

In order to facilitate fixing the position of the light guide plate, in one embodiment, the first surface of the light guide plate is provided with an adhesive layer. Specifically, the adhesive layer is a high-temperature double-sided adhesive tape, and the adhesive layer is arranged on the first surface of the light guide plate, so that the light guide plate can be more stably connected with the optical film, and the structural stability of the backlight module is improved.

In order to further fix the position of the light guide plate 300, in one embodiment, as shown in fig. 4 to fig. 6, the second frame 500 is provided with a plurality of positioning holes 530, the second surface of the light guide plate 300 is provided with a plurality of positioning pillars 320, and each of the positioning pillars 320 is inserted into each of the positioning holes 530 in a one-to-one correspondence manner. Specifically, the bottom of the accommodating cavity 510 is provided with a plurality of positioning holes 530, one surface of the light guide plate 300 away from the optical film 200 is provided with a plurality of positioning pillars 320, the shape of each positioning pillar 320 is matched with the shape of each positioning hole 530, when the light guide plate 300 is installed in the second frame 500, each positioning pillar 320 is inserted into each positioning hole 530, so that the light guide plate 300 can be limited, the light guide plate 300 is effectively prevented from moving transversely, and the structural stability of the backlight module 10 is improved.

In order to make the backlight module capable of better dissipating heat, in one embodiment, the second frame body is provided with a heat dissipation coating. Specifically, the material of heat dissipation coating is polytetrafluoroethylene, and when backlight unit used, the heat can be along with heat dissipation coating transmits to the external world for backlight unit's heat dispersion is better, has avoided causing the damage to it because of the high temperature, plays better guard action to backlight unit, makes backlight unit can dispel the heat better.

In one embodiment, a display device includes the backlight module described in any of the above embodiments. Specifically, through be provided with the barricade in first framework, and be provided with a plurality of buffering bubble cottons on the second face of supporting part, each buffering bubble cotton one side of keeping away from the supporting part has seted up the butt joint groove, and when the glass diaphragm was placed on each butt joint groove, each buffering bubble cotton and barricade played the effect of buffering and protection to the glass diaphragm, like this, effectively promoted display device's structural stability, avoided causing display device's display effect not good.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to 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 or 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 backlight module, comprising: the light guide plate comprises a first frame body, an optical diaphragm, a light guide plate, a reflecting film, a second frame body, a retaining wall, a plurality of buffer foam and a glass diaphragm;

the first frame body is detachably connected with the second frame body, the first frame body is provided with a bearing part, and a first surface of the bearing part is abutted against one surface of the optical membrane;

2. The backlight module as claimed in claim 1, wherein the first frame has a plurality of engaging grooves, each engaging groove is disposed through the inner and outer surfaces of the first frame, the outer surface of the second frame has a plurality of engaging blocks, and each engaging block is inserted into each engaging groove in a one-to-one correspondence.

3. The backlight module as claimed in claim 2, wherein the cross-sectional area of each of the engaging blocks is gradually increased from an end close to the retaining wall to an end away from the retaining wall.

4. The backlight module as claimed in claim 1, wherein the second frame has a plurality of through holes, the light guide plate has a plurality of stoppers, and the stoppers are respectively inserted into the through holes.

5. The backlight module as claimed in claim 1, wherein the retaining wall is integrally formed with the first frame.

6. The backlight module according to claim 1, wherein the optical film has a position-limiting engaging lug, and the first surface of the light guide plate has a position-limiting protrusion inserted into the position-limiting engaging lug.

7. The backlight module according to claim 6, wherein the optical film comprises a privacy film, an upper brightness enhancement film, a middle brightness enhancement film and a light-diffusing film, the limiting tabs comprise a first limiting tab, a second limiting tab, a third limiting tab and a fourth limiting tab, the first limiting tab is disposed on the privacy film, the second limiting tab is disposed on the upper brightness enhancement film, the third limiting tab is disposed on the middle brightness enhancement film, the fourth limiting tab is disposed on the light-diffusing film, and the limiting bosses are respectively inserted in the fourth limiting tab, the third limiting tab, the second limiting tab and the first limiting tab in sequence.

8. The backlight module as claimed in claim 1, wherein the first surface of the light guide plate is provided with an adhesive layer.

9. The backlight module as claimed in claim 1, wherein the second frame has a plurality of positioning holes, the second surface of the light guide plate has a plurality of positioning posts, and the positioning posts are inserted into the positioning holes in a one-to-one correspondence.

10. A display device comprising the backlight module as claimed in any one of claims 1 to 9.