CN217954881U

CN217954881U - Backlight module and display device

Info

Publication number: CN217954881U
Application number: CN202122516282.9U
Authority: CN
Inventors: 孙桂艳
Original assignee: InfoVision Optoelectronics Kunshan Co Ltd
Current assignee: InfoVision Optoelectronics Kunshan Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-12-02
Anticipated expiration: 2031-10-19

Abstract

The utility model relates to a show technical field, specifically disclose a backlight unit and display device. The backlight module comprises a back plate, a rubber frame and an optical diaphragm, wherein the back plate is of a flat plate structure, a first clamping piece is vertically arranged on the upper surface of the back plate, and the first clamping piece is formed by bending an extending part arranged on the side edge of the back plate upwards; the rubber frame is arranged on the periphery of the back plate, a second clamping piece is arranged on the rubber frame corresponding to the position of the first clamping piece, and the first clamping piece is clamped with the second clamping piece; the optical diaphragm is arranged in the containing space formed by the backboard and the rubber frame in an enclosing way. Backlight unit, backplate are the flat structure, have left out the setting of curb plate, under the unchangeable circumstances of backplate size, can increase the volume of accommodation space to a certain extent to increase optical diaphragm's size, make optical diaphragm's marginal distance backlight unit's middle part send out the interval increase of light zone, prevent that backlight unit from appearing the phenomenon of light leak, improve display device's display effect, promote user experience and feel.

Description

Backlight module and display device

Technical Field

The utility model relates to a show technical field, especially relate to a backlight module and display device.

Background

The liquid crystal display device has many advantages such as a thin body, power saving, and no radiation, and is widely used. Most of the liquid crystal display devices in the existing market are backlight liquid crystal display devices, which include a liquid crystal panel and a backlight module. The liquid crystal panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, a plurality of vertical and horizontal fine electric wires are arranged between the two glass substrates, the liquid crystal molecules are controlled to change directions by electrifying or not, and light rays of the backlight module are refracted out to generate pictures. Since the liquid crystal panel does not emit light, the backlight module is one of the key structures of the liquid crystal display device because the light source provided by the backlight module is needed to normally display the image.

The backlight module generally includes a back plate and a rubber frame, wherein the back plate includes a bottom plate and a side plate vertically disposed on the bottom plate, an accommodating space for accommodating the diaphragm is formed between the bottom plate and the side plate, and the rubber frame is disposed at an inner side of the side plate, surrounds the diaphragm, and is connected with the side plate. However, the design results in smaller accommodating space and reduced size of the film, so that the distance between the edge of the film and the light emitting area in the middle of the backlight module is smaller, and the light leakage phenomenon is easily caused. To solve this problem, the backlight module in the prior art is provided with a light-shielding tape, one end of which is adhered to the adhesive frame and the other end of which is adhered to the upper surface of the film. However, in this way, the membrane and the rubber frame are relatively easy to shift, which affects the display effect of the display device and the user experience.

Therefore, a backlight module and a display device are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a backlight unit and display device can improve the phenomenon of display device light leak, makes the display effect become good, and user experience feels and becomes good.

As the above conception, the utility model discloses the technical scheme who adopts is:

a backlight module includes:

the back plate is of a flat plate structure, a first clamping piece is vertically arranged on the upper surface of the back plate, and the first clamping piece is formed by bending an extending part arranged on the side edge of the back plate upwards;

the rubber frame is arranged on the periphery of the back plate, a second clamping piece is arranged on the rubber frame corresponding to the first clamping piece, and the first clamping piece is clamped with the second clamping piece;

the optical diaphragm is arranged in the containing space formed by the back plate and the rubber frame in an enclosing mode.

As a preferred scheme of the backlight module, the first clamping member comprises a clamping plate, the clamping plate is vertically arranged on the back plate, a clamping port is arranged on the clamping plate, and the second clamping member is clamped in the clamping port.

As a backlight unit's preferred scheme, the both sides of cardboard all are provided with laminating portion, laminating portion with the backplate is connected, the upper surface of laminating portion can with glue the lower surface of frame and laminate mutually.

As a preferred scheme of the backlight module, the rubber frame is adhered to the adhering part.

As a preferred scheme of the backlight module, the thickness of the second clamping piece is gradually reduced towards the direction far away from the rubber frame.

As a backlight unit's preferred scheme, the quantity of second joint spare is a plurality of, and is a plurality of second joint spare is followed the circumference interval setting of gluing the frame, one second joint spare all corresponds one first joint spare.

As an optimal scheme of the backlight module, the cross section of the rubber frame is of a U-shaped structure, the corners of the rubber frame are provided with limit blocks, limit grooves are formed in the limit blocks, and the corners of the optical diaphragm are located in the limit grooves.

As a preferred scheme of backlight unit, the stopper to the inside protrusion setting of gluey frame, just the both ends of spacing groove with be equipped with the interval between the medial surface of gluey frame.

In order to achieve the above object, the present invention further provides a display device, including the backlight module according to any one of the above aspects.

The utility model has the advantages that:

the utility model provides a backlight module, which realizes the stable connection of a back plate and a rubber frame and ensures the stability of the backlight module by respectively arranging a first clamping piece and a second clamping piece which can be mutually clamped on the back plate and the rubber frame; compared with the prior art, the back plate is of a flat plate structure, the arrangement of the side plate is omitted, the size of the accommodating space can be increased to a certain extent under the condition that the size of the back plate is not changed, so that the size of the optical diaphragm is increased, the distance between the edge of the optical diaphragm and a light emitting area in the middle of the backlight module is increased, the phenomenon of light leakage of the backlight module is prevented, the display effect of the display device is improved, and the user experience is improved; according to the backlight module, the arrangement of the side plate is omitted, so that the thickness of the side part of the backlight module can be reduced, and the narrow-frame design of the backlight module is realized; in addition, the first clamping piece is formed by bending the extending part on the back plate upwards, so that the first clamping piece and the back plate are of an integrated structure, and during processing, the first clamping piece and the back plate are not required to be assembled by using an additional connecting piece, so that the assembling time can be saved, and the assembling efficiency can be improved; and the structure of integral type can also increase the steadiness of backplate, improves the intensity of backplate, avoids it to take place to damage at the connection gap.

The utility model also provides a display device, through using above-mentioned backlight unit, can guarantee display device's display effect, reduce the product defective rate, promote user experience and feel.

Drawings

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

fig. 2 is a schematic view of a matching relationship between a back plate and a rubber frame in a backlight module according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a schematic structural diagram of a back plate of a backlight module according to an embodiment of the present invention;

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

fig. 6 is a schematic view of an expanded structure of a back plate of a backlight module according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a rubber frame of a backlight module according to an embodiment of the present invention;

fig. 8 is a partial enlarged view of fig. 7 at C.

In the figure:

10-an extension; 20-bending and sewing;

1-a back plate; 11-a first snap-in member; 111-cardboard; 112-card interface; 12-a bonding part;

2-glue frame; 21-a second snap-in member;

3-an optical film;

4-a limiting block; 41-a limiting groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present invention; fig. 2 is a schematic view of a matching relationship between a back plate and a rubber frame in a backlight module according to an embodiment of the present invention; fig. 3 is a partial enlarged view of fig. 2 at a. As shown in fig. 1-3, the present embodiment provides a backlight module, which includes a back plate 1, a rubber frame 2 and an optical film 3, wherein the back plate 1 is a flat plate structure, and a first clamping member 11 is vertically disposed on an upper surface of the back plate 1; the rubber frame 2 is arranged on the periphery of the back plate 1, a second clamping piece 21 is arranged on the rubber frame 2 corresponding to the first clamping piece 11, and the first clamping piece 11 is clamped with the second clamping piece 21; the optical film 3 is arranged in an accommodating space formed by the backboard 1 and the rubber frame 2 in a surrounding way.

In the backlight module provided by this embodiment, the first clamping piece 11 and the second clamping piece 21 which can be clamped with each other are respectively arranged on the back plate 1 and the rubber frame 2, so that the back plate 1 and the rubber frame 2 are stably connected, and the stability of the backlight module is ensured; compared with the prior art, the back plate 1 is of a flat plate structure, the arrangement of a side plate is omitted, and under the condition that the size of the back plate 1 is not changed, the size of the accommodating space can be increased to a certain extent so as to increase the size of the optical diaphragm 3, so that the distance between the edge of the optical diaphragm 3 and a middle light emitting area of the backlight module is increased, the phenomenon of light leakage of the backlight module is prevented, the display effect of the display device is improved, and the user experience is improved; according to the backlight module, the arrangement of the side plate is omitted from the back plate 1, so that the thickness of the side part of the backlight module can be reduced, and the narrow frame design of the backlight module is realized.

Optionally, the number of the second clamping members 21 is multiple, the multiple second clamping members 21 are arranged at intervals along the circumferential direction of the rubber frame 2, and each second clamping member 21 corresponds to one first clamping member 11. In this embodiment, glue frame 2 and be the U-shaped structure, the gluey frame 2 of U-shaped structure encloses the periphery of establishing at backplate 1, one side that backplate 1 is not connected with gluey frame 2 is for going into the light side, all be provided with four second joint spare 21 on every lateral wall of gluing frame 2, three side except that going into the light side all is provided with the first joint spare 11 with second joint spare 21 one-to-one on backplate 1 simultaneously, under the prerequisite of guaranteeing to glue frame 2 and backplate 1 stable connection, the quantity of second joint spare 21 of minimizing to reduce the processing cost. Certainly, in other embodiments, the number of the second clamping members 21 arranged on each side wall of the rubber frame 2 may also be adjusted according to actual situations, which is not limited in this embodiment.

Fig. 4 is a schematic structural diagram of a back plate of a backlight module according to an embodiment of the present invention; fig. 5 is a partial enlarged view of fig. 4 at B. As shown in fig. 3-5, the first clamping member 11 includes a clamping plate 111, the clamping plate 111 is vertically disposed on the back plate 1, a clamping interface 112 is disposed on the clamping plate 111, and the second clamping member 21 is clamped in the clamping interface 112, so as to facilitate processing and facilitate installation between the back plate 1 and the rubber frame 2.

Optionally, in this embodiment, the cross-sectional shape of the clip interface 112 and the cross-sectional shape of the second clip member 21 are both square structures, which facilitates processing. Of course, in other embodiments, the cross-sectional shape of the card interface 112 and the cross-sectional shape of the second card member 21 may also be a circular structure, an oval structure or a polygonal structure, which is not limited in this embodiment as long as the stable card connection between the card interface 112 and the second card member 21 can be achieved.

In order to facilitate the installation between the first clamping member 11 and the second clamping member 21, in this embodiment, the thickness of the second clamping member 21 is gradually reduced toward the direction away from the rubber frame 2. When installing backplate 1 and gluey frame 2, operating personnel can insert the osculum end of second joint spare 21 in joint interface 112 smoothly, along with the increase of second joint spare 21 insertion joint interface 112 degree of depth, the clearance between joint interface 112 and the second joint spare 21 reduces gradually until the clearance between the two is zero, accomplishes the assembly promptly. Optionally, when the rubber frame 2 is attached to the outer surface of the first engaging member 11, the second engaging member 21 is in interference fit with the engaging interface 112, and the connection is stable and is not easily separated.

Of course, in other embodiments, the second engaging member 21 may be made of an elastic material. The second clamping member 21 is clamped into the clamping interface 112 by the deformation of the elastic material, and the second clamping member 21 is tightly clamped in the clamping interface 112 under the action of the elastic restoring force. In this embodiment, the second clip 21 may be a rubber block or a sponge block, and the elastic restoring force is better, and the manufacturing cost is lower.

Further, the first clamping piece 11 is formed by bending the extending part 10 arranged on the side edge of the back plate 1 upwards. By adopting the mode, the first clamping piece 11 and the back plate 1 are of an integrated structure, and when the first clamping piece 11 and the back plate 1 are machined, an extra connecting piece is not needed for assembling the first clamping piece 11 and the back plate 1, so that the assembling time can be saved, and the assembling efficiency can be improved; and the structure of integral type can also increase the steadiness of backplate 1, improves the intensity of backplate 1, avoids it to take place to damage at the connection gap.

Further, as shown in fig. 5, both sides of the clamping plate 111 are provided with attaching portions 12, the attaching portions 12 are connected with the back plate 1, and the upper surface of the attaching portions 12 can be attached to the lower surface of the rubber frame 2. Through gluing frame 2 and laminating portion 12 and laminating mutually, can increase backplate 1 and glue the area of contact between the frame 2, guarantee backplate 1 and glue the connection steadiness between the frame 2.

Optionally, the adhesive frame 2 is adhered to the adhering portion 12. The connection stability between the back plate 1 and the rubber frame 2 is further improved. Wherein, adopt the adhesion to glue between frame 2 and the laminating portion 12 and realize being connected between the two. The adhesion glue can be double faced adhesive tape, one side of the double faced adhesive tape is adhered to the lower surface of the glue frame 2, the other side of the double faced adhesive tape is adhered to the upper surface of the fitting part 12, materials are conveniently obtained, and the production cost can be reduced.

Fig. 6 is a schematic view of an expanded structure of a back plate of a backlight module according to an embodiment of the present invention. Specifically, as shown in fig. 6, when the back plate 1 is processed, a back plate 1 with side edges connected with the extending portions 10 is cut on a raw material, and the number and the arrangement of the extending portions 10 are the same as those of the first clamping pieces 11 after molding; a through hole is formed in each extending part 10 to form a clamping interface 112; then, cutting a bending seam 20 towards the middle of the back plate 1 along two side edges of the extending part 10, wherein the depth of the bending seam 20 should be equal to the width of the attaching part 12, and the bending seam cannot be too long, otherwise, the volume of the accommodating space and the light intensity of the backlight module are affected; finally, the operator bends each of the extending portions 10 upward to form the first catching pieces 11.

Fig. 7 is a schematic structural diagram of a rubber frame of a backlight module according to an embodiment of the present invention; fig. 8 is a partial enlarged view of fig. 7 at C. As shown in fig. 7 and 8, the cross-sectional shape of the rubber frame 2 is a U-shaped structure, the corner of the rubber frame is provided with a limit block 4, the limit block 4 is provided with a limit groove 41, and the corner of the optical diaphragm 3 is located in the limit groove 41. Through setting up spacing groove 41, can play and hold and spacing effect to the corner of optical film 3 to guarantee the stability of optical film 3 position in the accommodation space, prevent that the relative accommodation space of optical film 3 from taking place the position change, influence display device's display effect.

Preferably, the limiting block 4 is protruded towards the inside of the rubber frame 2, and a space is arranged between the two ends of the limiting groove 41 and the inner side surface of the rubber frame 2. By adopting the arrangement mode, after the corners of the optical diaphragm 3 are limited in the limiting grooves 41, a certain gap can exist between the side edge of the optical diaphragm 3 and the inner side surface of the rubber frame 2. When the optical film 3 expands after being used for a long time, the gap provides a sufficient expansion space for the optical film 3, and the service life of the backlight module can be prolonged.

The embodiment also provides a display device, which comprises the backlight module. Through using above-mentioned backlight unit, can guarantee display device's display effect, reduce the product defective rate, promote user experience and feel.

The above embodiments have only been explained the basic principle and characteristics of the present invention, the present invention is not limited by the above embodiments, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and modifications all fall into the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A backlight module, comprising:

the back plate (1) is of a flat plate structure, a first clamping piece (11) is vertically arranged on the upper surface of the back plate (1), and the first clamping piece (11) is formed by upwards bending an extending part (10) arranged on the side edge of the back plate (1);

the rubber frame (2) is arranged on the periphery of the back plate (1), a second clamping piece (21) is arranged on the rubber frame (2) corresponding to the first clamping piece (11), and the first clamping piece (11) is clamped with the second clamping piece (21);

the optical diaphragm (3) is arranged in an accommodating space formed by the back plate (1) and the rubber frame (2) in a surrounding mode.

2. The backlight module according to claim 1, wherein the first engaging member (11) comprises a engaging plate (111), the engaging plate (111) is erected on the back plate (1), the engaging plate (111) is provided with an engaging opening (112), and the second engaging member (21) is engaged in the engaging opening (112).

3. The backlight module according to claim 2, wherein the two sides of the clamping plate (111) are respectively provided with an attaching portion (12), the attaching portions (12) are connected with the back plate (1), and the upper surface of the attaching portions (12) can be attached to the lower surface of the rubber frame (2).

4. A backlight module according to claim 3, characterized in that the adhesive frame (2) is adhered to the attaching portion (12).

5. The backlight module according to claim 1, wherein the thickness of the second engaging member (21) is gradually reduced in a direction away from the plastic frame (2).

6. A backlight module according to any one of claims 1-5, characterized in that the number of the second clamping members (21) is plural, the plural second clamping members (21) are arranged along the circumferential direction of the rubber frame (2) at intervals, and one second clamping member (21) corresponds to one first clamping member (11).

7. The backlight module according to any one of claims 1 to 5, wherein the cross-sectional shape of the rubber frame (2) is a U-shaped structure, a limiting block (4) is disposed at a corner of the rubber frame (2), a limiting groove (41) is disposed on the limiting block (4), and a corner of the optical film (3) is located in the limiting groove (41).

8. The backlight module according to claim 7, wherein the limiting block (4) protrudes toward the inside of the plastic frame (2), and a space is provided between two ends of the limiting groove (41) and the inner side surface of the plastic frame (2).

9. A display device comprising the backlight module according to any one of claims 1-8.