CN204313140U - Backlight module and liquid crystal display - Google Patents

Abstract

A kind of backlight module comprises light guide plate, optical diaphragm group and glue frame, glue frame is arranged on light guide plate periphery, optical diaphragm group is arranged on light guide plate, the at least side of the superiors' diaphragm of optical diaphragm group is extended protuberance, glue frame corresponds to the carrying cave that there is this protuberance of storage at this protuberance place, the close glue frame side of this protuberance has opening, the projection engaged with this opening is provided with in this carrying cave, at least one side of this protuberance is extended with lug, glue frame corresponds to the groove that this lug place is provided with this lug of storage, described lug is standby Jiao Qu towards the surface of described groove.Backlight module of the present utility model is by opening and projection, groove coordinates with lug, the direction being parallel to blooming piece place plane is located this blooming piece, by the surface towards groove of lug, standby Jiao Qu is set, direct and the groove bonding by the superiors' diaphragm, Simplified flowsheet, saves cost, simultaneously with plane being perpendicular direction, blooming piece place on locate this blooming piece.

Description

Backlight module and liquid crystal display

technical field

The utility model relates to the technical field of liquid crystal display, in particular to a backlight module and a liquid crystal display including the backlight module.

Background technique

The liquid crystal display includes a liquid crystal display panel and a backlight module. The backlight module is one of the key components of the liquid crystal display. Its function is to provide a uniformly distributed light source for the liquid crystal display panel. In the existing backlight module, the optical film group is usually fixed in the plastic frame by adhesive tape. Figure 1 is a schematic diagram of the decomposition structure of the existing backlight module, and Figure 2 is the existing adhesive tape. Schematic diagram of the local structure of the backlight module of the optical film set. As shown in Figure 1, the existing backlight module 10 includes an optical film set 11, a plastic frame 12, and an adhesive tape 13. At least one side of the optical film set 11 has a protruding portion 111, and the plastic frame 12 corresponds to the The protruding portion 111 is provided with a carrying hole 121 for accommodating the protruding portion 111, and at the same time, the plastic frame 12 is provided with an adhesive tape container 122 on the upper surface adjacent to the carrying hole 121. When assembling the backlight module 10, the optical The film set 11 is placed on the plastic frame 12, correspondingly, the protruding part 111 of the optical film set 11 is located in the carrying hole 121 of the plastic frame 12, and then the protruding part 111 is fixed to the carrying hole 121 by using an adhesive tape 13 (as shown in FIG. 2 ), so as to realize the fixing of the optical film group 11 and the plastic frame 13 .

However, in the above-mentioned existing backlight module, since it is necessary to attach the optical film group to the plastic frame with an adhesive tape, the process of attaching and fixing the adhesive tape is added, which not only complicates the process, but also makes the production efficiency low and wastes materials. In addition, in the subsequent assembly process of the liquid crystal display, during the product verification or transportation process of the liquid crystal display, due to the shaking, the optical film group can easily slide and fall out of the plastic frame, so that the backlight module cannot provide a uniformly distributed light source. Cause various display defects on the appearance of the liquid crystal display panel.

Utility model content

In view of the above problems, the utility model provides a backlight module and a liquid crystal display, which can save materials, have a relatively simple manufacturing process, and the optical film group is not easily separated from the plastic frame.

The utility model provides a backlight module, which includes a light guide plate, an optical film group and a plastic frame, the plastic frame is arranged on the periphery of the light guide plate, the optical film group is arranged on the light guide plate, and the optical film group includes The uppermost film and the lower film below the uppermost film, at least one side of the uppermost optical film has a protruding part, and the rubber frame is provided with a bearing for accommodating the protruding part corresponding to the protruding part There is an opening on the side of the protruding part close to the plastic frame, and a protrusion engaged with the opening is provided in the carrying hole. At least one side of the protruding part is extended with a lug, and the plastic frame corresponds to the protruding ear. The ear is provided with a groove for accommodating the lug, and the surface of the lug facing the side of the rubber frame is provided with a glue preparation area.

Preferably, a first lug and a second lug respectively extend from both sides of the protruding portion, the opening is a U-shaped opening, and the straight line where the first lug and the second lug are located is in line with the U-shaped opening. The axes of symmetry are perpendicular to each other.

Further, the groove includes a first groove for accommodating the first lug and a second groove for accommodating the second lug, and the lugs correspond to the grooves one by one. The lug is accommodated in the groove, the depth of the groove is greater than or equal to the thickness of the uppermost membrane, and is used to limit the uppermost membrane to move away from the sealant.

Preferably, the first lug and the second lug are integrally formed with the protrusion, and the thickness of the first lug and the second lug is consistent with the thickness of the protrusion, which is equal to the thickness of the uppermost membrane .

Further, the surfaces of the first lug and the second lug facing the side of the groove are glue preparation areas.

Further, there is glue preparation at the bottom of the glue preparation area.

Further, the height of the protrusion is equal to or greater than the thickness of the opening, which is used to restrict the uppermost film from climbing up the plastic frame.

The utility model also provides a liquid crystal display, which includes a liquid crystal display panel and the above-mentioned backlight module, and the liquid crystal display panel is fixed on the backlight module.

In an embodiment of the present invention, an opening is provided on the side facing the plastic frame on the protruding part of the uppermost diaphragm, and a protrusion engaged with the opening is provided in the bearing hole of the plastic frame for accommodating the protruding part. The engagement with the protrusion limits the tendency of the upper membrane to move toward the side of the rubber frame, preventing the uppermost membrane from climbing to the rubber frame; at the same time, by extending the lug on at least one side of the protrusion , the rubber frame is provided with a groove corresponding to the lug for receiving the lug, and the lug is accommodated in the groove so as to limit the tendency of the uppermost diaphragm to move away from the rubber frame, avoiding the uppermost There is a risk that the diaphragm will be detached from the plastic frame. Through the engagement of the opening and the protrusion, the cooperation of the groove and the lug, the optical diaphragm is positioned in a direction parallel to the plane where the optical diaphragm is located; in addition, by The surface of the lug facing the groove is provided with a glue area, so that the uppermost membrane is directly bonded to the groove, which saves the procedure of using adhesive tape to fix the uppermost membrane and the glue frame together, and also simplifies The process is improved, the material is saved, the production efficiency is improved, and the optical film is positioned in a direction perpendicular to the plane where the optical film is located, thereby avoiding the movement of the optical film in this direction and further fixing the optical film.

Description of drawings

FIG. 1 is a schematic diagram of an exploded structure of an existing backlight module;

FIG. 2 is a schematic diagram of a partial structure of an existing backlight module that uses adhesive tape to fix the optical film group;

FIG. 3 is a schematic diagram of a plane exploded structure of a backlight module in an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional structure diagram of the backlight module shown in FIG. 3;

Fig. 5 is a schematic structural view of the protruding part of the uppermost diaphragm in an embodiment of the present invention.

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the intended purpose of the utility model, the specific implementation, structure, features and effects of the utility model will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. .

FIG. 3 is a schematic diagram of a plane exploded structure of a backlight module in an embodiment of the present invention. Fig. 4 is a partial cross-sectional structural schematic diagram of the backlight module shown in Fig. 3, as shown in Fig. 3 and Fig. 4, the backlight module 20 includes an optical film group 21, a plastic frame 22, a light guide plate 23 and a back plate 25, wherein , the optical film group 21, the plastic frame 22, and the light guide plate 23 are stored in the storage space formed by the back plate 25, the plastic frame 22 is located around the periphery of the light guide plate 23, the optical film group 21 is arranged on the light guide plate 23, and the optical film Sheet group 21 comprises a plurality of optical films, and these optical films are such as diffusion sheet (Diffusersheet), prism sheet (prism sheet) etc., and this optical film group 21 comprises uppermost layer diaphragm 211 and is positioned at this uppermost layer diaphragm below. The lower membrane 212, at least one side of the uppermost membrane 211 has a protruding part 2110, and the protruding part 2110 is provided with an opening 21101 near the side of the plastic frame, and the plastic frame 22 corresponds to the protruding part of the uppermost membrane 211 2110 is provided with a bearing cavity 221 for accommodating the protrusion 2110, and a protrusion 2210 is also provided in the bearing cavity 221. The height of the protrusion 2210 is higher than or equal to the thickness of the uppermost membrane 211. The protrusion 2210 engages with the opening 21101, thereby restricting the movement of the uppermost diaphragm 211 toward the side of the rubber frame 22. In this embodiment, through the cooperation of the opening 21101 and the protrusion 2210, The direction of positioning the uppermost membrane 211 avoids the risk of the uppermost membrane 211 climbing to the plastic frame 22 .

Fig. 5 is a schematic diagram of the local structure of the protrusion of the uppermost diaphragm in an embodiment of the present invention. Please refer to Fig. 5, at least one side of the protrusion 2110 has a lug extending out. In this embodiment, the The first lug 2113 and the second lug 2115 respectively extend from the two sides of the protruding part 2110. The opening 21101 of the protruding part 2110 is U-shaped, wherein the line where the first lug 2113 and the second lug 2115 are located is in line with The symmetry axes of the U-shaped openings 21101 are perpendicular to each other. The first lug 2113 and the second lug 2115 can be integrally formed with the protruding portion 2110 , and the thickness of the first lug 2113 and the second lug 2115 is consistent with the thickness of the protruding portion 2110 , which is equal to the thickness of the uppermost diaphragm 211 . In this embodiment, the surface of the first lug 2113 and the second lug 2115 facing the side of the rubber frame 22 is a glue preparation area, and there is glue preparation in the glue preparation area, which is used to connect the uppermost membrane 211 with the rubber frame 22. The glue frame 22 is bonded and fixed together.

Please refer to FIG. 4 again. In this embodiment, the plastic frame 22 of the backlight module 20 is provided at the position corresponding to the first lug 2113 and the second lug 2115 for accommodating the first lug 2113 and the second lug 2115 . The first groove 223 and the second groove 225 of the lug 2115, the first groove 223 and the second groove 225 correspond to the first lug 2113 and the second lug 2115, wherein the first groove The depth of the groove 223 and the second groove 225 is greater than or equal to the thickness of the first lug 2113 and the second lug 2115, so that when the first lug 2113 and the second lug 2115 are received in the first The groove 223 and the second groove 225 can restrict the uppermost membrane 211 from moving away from the plastic frame 22 , preventing the uppermost membrane 211 from detaching from the rubber frame 22 .

In this embodiment, when the first lug 2113 and the second lug 2115 are accommodated in the first groove 223 and the second groove 225, since the first lug 2113 and the second lug The surface of 2115 facing the groove is the glue preparation area. Therefore, the uppermost membrane 211 and the glue frame 22 can be directly bonded and fixed together through the glue preparation area of the lug, thereby eliminating the need for adhesive tape to be attached and fixed. The manufacturing process simplifies the process, saves materials, and achieves the positioning of the uppermost film in the direction perpendicular to the plane where the optical film is located.

The utility model also provides a liquid crystal display, which includes a display panel and the above-mentioned backlight module 20, and the display panel is fixed on the backlight module.

To sum up, in the backlight module of the embodiment of the present invention, an opening is opened on the side facing the rubber frame of the protruding part of the uppermost membrane, and a protrusion is provided at the corresponding position of the bearing hole of the plastic frame. A lug extends from at least one side of the rubber frame, and a groove for accommodating the lug is provided at the corresponding position of the plastic frame. Through the engagement of the opening and the protrusion, the cooperation of the lug and the groove, so that it is in the same plane as the optical film. Orient the optical film in a parallel direction to prevent its movement relative to the sealant. In addition, the side of the lug facing the groove is the glue preparation area, and the uppermost membrane is directly bonded to the groove, which saves the procedure of fixing the uppermost membrane and the rubber frame with adhesive tape, and also simplifies the process , saving material, improving production efficiency, and positioning the optical film in a direction perpendicular to the plane where the optical film is located, avoiding movement of the optical film in this direction, and further fixing the optical film.

The above are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any Those who are familiar with this profession, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all without departing from the technical solution of the utility model Content, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (9)

1. a backlight module, comprise light guide plate, optical diaphragm group and glue frame, it is peripheral that this glue frame is arranged on this light guide plate, this optical diaphragm group is arranged on this light guide plate, this optical diaphragm group comprises the superiors' diaphragm and is positioned at the lower floor's diaphragm below this superiors' diaphragm, the at least side of this superiors' blooming piece is extended protuberance, glue frame is provided with the carrying cave for receiving this protuberance corresponding to this protuberance place, it is characterized in that, the close glue frame side of this protuberance has opening, the projection engaged with described opening is provided with in this carrying cave, at least one side of this protuberance extends lug, glue frame is provided with the groove for receiving this lug corresponding to this lug place, described lug is provided with standby Jiao Qu towards the surface of described glue frame side.

2. backlight module as claimed in claim 1, it is characterized in that: this protuberance dual-side extends the first lug and the second lug respectively, described opening is U-shaped opening, and this first lug is mutually vertical with the axis of symmetry of described U-shaped opening with the straight line at this second lug place.

3. backlight module as claimed in claim 2, is characterized in that: this groove comprises the first groove for receiving the first lug and the second groove for receiving this second lug, described lug and described groove one_to_one corresponding.

4. backlight module as claimed in claim 3, it is characterized in that: this lug is accommodated in this groove, the degree of depth of this groove is more than or equal to the thickness of this superiors' diaphragm, moves towards the direction away from frame glue for limiting this superiors' diaphragm.

5. backlight module as claimed in claim 4, is characterized in that: this first lug and this second lug one-body molded with this protuberance, this first lug and the thickness of this second lug and the consistency of thickness of this protuberance, equal the thickness of this superiors' diaphragm.

6. backlight module as claimed in claim 2, is characterized in that: the surface towards groove side of this first lug and the second lug is standby Jiao Qu.

7. backlight module as claimed in claim 6, is characterized in that: described standby Jiao Qu is provided with standby glue.

8. backlight module as claimed in claim 1, is characterized in that: the height of this projection is equal to or greater than the thickness of this superiors' diaphragm, climbing up this glue frame for limiting this superiors' diaphragm.

9. a liquid crystal display, comprises display panels, it is characterized in that: this liquid crystal display also comprises the backlight module according to any one of claim 1-8, and this display panels is fixed on this backlight module.