CN211149136U - Backlight module, liquid crystal display screen and terminal equipment - Google Patents

Abstract

The utility model discloses a backlight module, liquid crystal display and terminal equipment, wherein, backlight module includes the module body and sets up the frame subassembly in module body week portion, the module body includes the backplate, set gradually the optics diaphragm subassembly on the backplate, OC and apron, the frame subassembly includes frame and center, the frame can be dismantled with the backplate and be connected, the center includes first frame body, first frame body clamp is established between apron and backplate, one side of first frame body has the convex part that stretches into between OC and the optics diaphragm subassembly, a side that the convex part is close to the apron is used for supporting the OC, a side that the convex part is close to the backplate is used for compressing tightly optics diaphragm subassembly on the backplate. Through compressing tightly the center between apron and backplate, can save the fix with screw center, fixed knot constructs simply, and because of having saved the screw, be difficult for producing metal piece and damage the module on the center, in addition, under the restriction of apron and backplate, the center is difficult for taking place the deformation with the OC, avoids the light leak.

Description

Backlight module, liquid crystal display screen and terminal equipment

Technical Field

The utility model relates to a display device technical field especially relates to a backlight unit, liquid crystal display and terminal equipment.

Background

In the prior art, because the liquid crystal display has the characteristics of low electromagnetic radiation, low power consumption, less heat productivity, light weight, thinness and the like, the liquid crystal display is a mainstream display in the market, and L ED backlight displays are widely applied, however, the L ED backlight displays in the market are mainly divided into a side-in type and a direct type according to the light-in mode, wherein the side-in type is to install L ED lamp strings of the backlight module around the liquid crystal screen, and the direct type is to install L ED lamp strings of the backlight module on the front and back of the liquid crystal screen, so that the liquid crystal display is lower in cost and wider in application compared with the direct type backlight display.

At present, the frame of the conventional direct type backlight module generally includes an outer frame and a middle frame, as shown in fig. 1, OC1 ' is generally installed on the middle frame 2 ', the middle frame 2 ' is fixed on the back plate 4 ' by using screws 3 ', a positioning pin 5 ' is located below the middle frame 2 ' to provide positioning for the optical film 6 ', the outer frame 7 ' is used for installing structures such as a PCB board, an infrared emitting/receiving device and a light filter 8 ', and a tempered glass 9 ' is fixed on one side of the outer frame 7 ' close to the back plate 4 '. The inventor finds that the prior art has the following problems in the process of realizing the utility model: 1. the screws 3 'for fixing the middle frame 2' are small-head screws which are easy to slide, once the screws are extremely difficult to take out, metal debris is easy to generate in the taking-out process and enter the module, and therefore the module is damaged; 2. the material of center 2 ' is softer, and the in-process that the screw 3 ' twisted needs to be controlled torsion, prevents to twist the in-process of screw 3 ' and damages center 2 ', consequently the operation is complicated, and production efficiency is low, and in addition, the straightness accuracy of center 2 ' is difficult to the management and control, adopts screw 3 ' and backplate 4 ' fixed back, and fixed position pastes tight backplate 4 ', receives the influence of screw 3 ' stationary force, and center 2 ' can slightly warp for other positions perk, and then arouse OC1 ' local deformation to produce the light leak.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: the utility model provides a backlight unit, liquid crystal display and terminal equipment, wherein the frame adopts screwless fixed knot to construct, and fixed knot constructs simply, easy dismounting, and the center is non-deformable.

To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, a backlight module is provided, which includes a module body and a frame assembly disposed on a peripheral portion of the module body, the module body includes a back plate, an optical film assembly, an OC, and a cover plate sequentially disposed on the back plate, the frame assembly includes an outer frame and a middle frame, the outer frame is detachably connected to the back plate, the middle frame includes a first frame body, the first frame body is clamped between the cover plate and the back plate, one side of the first frame body has a convex portion extending into the OC and the optical film assembly, one side of the convex portion close to the cover plate is used for supporting the OC, and one side of the convex portion close to the back plate is used for compressing the optical film assembly onto the back plate.

The utility model discloses beneficial effect does: through compressing tightly the center between apron and backplate, can save the fix with screw center, fixed knot constructs simply, easy dismounting, and production efficiency is high, and because of having saved the screw, be difficult for producing metal piece and damage the module on the center, in addition, under the restriction of apron and backplate, the center is difficult for taking place to warp, and then the OC also is difficult for taking place to warp, avoids the light leak.

As a preferable scheme of the backlight module, a first buffer layer is disposed between the cover plate and the first frame body. Through setting up first buffer layer, can reduce friction and collision between center and the apron, and first buffer layer has elasticity, consequently when the center is fixed to apron and backplate, can also utilize the deformation of first buffer layer to make the center fix firmly between apron and backplate, effectively prevents that the center from taking place to rock.

As a preferable mode of the backlight module, the first buffer layer extends to between the convex portion and the cover plate. The design can increase the area of the first buffer layer and enhance the buffer effect.

As a preferable scheme of the backlight module, a limiting part is convexly arranged on one side surface of the convex part close to the back plate, and the limiting part is inserted into the hanging hole of the optical diaphragm assembly. The limiting part arranged on the middle frame can position the position of the optical diaphragm assembly to prevent the optical diaphragm assembly from separating from the position between the middle frame and the back plate.

As a preferred scheme of backlight unit, be fixed with the shop bolt on the backplate, be provided with the confession on the spacing portion the shop bolt passes through dodge the groove or dodge the hole. The positioning pins are arranged to further limit the position of the middle frame, so that the middle frame cannot move relative to the back plate and the cover plate.

As a preferable scheme of the backlight module, the outer frame includes a second frame body, the second frame body is provided with a notch, the second frame body is provided with a first side surface and a second side surface which are connected, the notch is formed between the first side surface and the second side surface, the first side surface is parallel to the cover plate, the first side surface is abutted to a side surface of the cover plate departing from the back plate, and the second side surface is in contact with or spaced from the edge of the cover plate. Through set up above-mentioned breach on the frame, can reduce the installation degree of difficulty of apron, when the installation, the apron stacks on the frame that the combination is good, then installs OC, center, optics diaphragm subassembly in proper order again, installs the backplate at last again to with backplate and frame fixed connection, can find out from this, the apron no longer is the mode of side dress and inserts in the slot of frame setting, effectively prevents to lap the surface and takes place wearing and tearing with the slot friction.

As a preferable scheme of the backlight module, an adhesive layer is disposed between the cover plate and the first side surface. Through setting up the viscose layer, can prevent effectively that apron and frame from taking place relative movement after the assembly.

As a preferable scheme of the backlight module, the first side surface is perpendicular to the second side surface, and a second buffer layer is disposed between the second side surface and the edge of the cover plate. Through setting up the second buffer layer, can prevent on the one hand that the edge of apron and frame from taking place the rigidity collision and damaging, on the other hand can also utilize the second buffer layer to fill the clearance between the edge of apron and the second side, reinforcing structural stability.

In a second aspect, a liquid crystal display panel is provided, which includes the backlight module.

In a third aspect, a terminal device is provided, which includes the backlight module.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic cross-sectional view of a conventional backlight module.

Fig. 2 is a schematic cross-sectional view of the backlight module of the present invention.

In fig. 1:

1', OC; 2', a middle frame; 3', a screw; 4', a back plate; 5', a positioning pin; 6', an optical membrane; 7', an outer frame; 8', a light filtering part; 9' and tempered glass.

In fig. 2:

1. a back plate; 2. an optical film assembly; 3. OC; 4. a cover plate; 5. an outer frame; 51. a second frame body; 52. a notch; 53. a first side surface; 54. a second side surface; 55. a mounting side surface; 56. an abutting portion; 6. a middle frame; 61. a first frame body; 62. a convex portion; 63. a limiting part; 64. an avoidance groove; 7. a first buffer layer; 8. and positioning the pin.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

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; either directly or indirectly through intervening media, either internally or in any other relationship. 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 disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

As shown in fig. 2, the backlight module according to the embodiment of the present invention includes a module body and a frame assembly disposed on the periphery of the module body, the module body includes a back plate 1, an optical film assembly 2 disposed on the back plate 1 in sequence, an OC3(Opencell, liquid crystal panel) and a cover plate 4, the frame assembly includes an outer frame 5 and an intermediate frame 6, the outer frame 5 is detachably connected to the back plate 1, the intermediate frame 6 includes a first frame body 61, the first frame body 61 is clamped between the cover plate 4 and the back plate 1, one side of the first frame body 61 has a protrusion 62 extending into the space between the OC3 and the optical film assembly 2, a side of the protrusion 62 close to the cover plate 4 is used for supporting the OC3, and a side of the protrusion 62 close to the back plate 1 is used for pressing the optical film assembly 2 onto the back plate. Through compressing tightly center 6 between apron 4 and backplate 1, can save fix with screw center 6, fixed knot constructs simply, easy dismounting, and production efficiency is high, and because of having saved the screw, be difficult for producing metal piece and damaging the module on center 6, in addition, under the restriction of apron 4 and backplate 1, center 6 is difficult for taking place to warp, and then OC3 also is difficult for taking place to warp, avoids the light leak.

In the present embodiment, the first buffer layer 7 is disposed between the cover plate 4 and the first frame body 61. Through setting up first buffer layer 7, can reduce friction and collision between center 6 and the apron 4, and first buffer layer 7 has elasticity, consequently when apron 4 and backplate 1 are fixed center 6, can also utilize the deformation of first buffer layer 7 to make center 6 fix firmly between apron 4 and backplate 1, effectively prevents that center 6 from taking place to rock.

Further, the first buffer layer 7 extends between the convex portion 62 and the cover plate 4. The design can increase the area of the first buffer layer 7 and enhance the buffering effect.

Specifically, the first buffer layer 7 is a buffer foam.

In addition, the first buffer layer 7 may be bonded to a side of the cover plate 4 adjacent to the middle frame 6, or the first buffer layer 7 may be bonded to the middle frame 6. Above-mentioned fixed mode can be fixed as an organic whole first buffer layer 7 and apron 4 or center 6, the subsequent installation of being convenient for, and simultaneously, first buffer layer 7's rigidity can also effectively prevent to take place relative shift between first buffer layer 7 and the center 6, stops center 6 and apron 4 direct contact completely.

In one embodiment, a side of the protrusion 62 near the back plate 1 is provided with a limiting portion 63 in a protruding manner, and the limiting portion 63 is inserted into a suspension hole (not shown) of the optical film assembly 2. The limiting part 63 provided on the middle frame 6 can position the position of the optical diaphragm assembly 2, and prevent the optical diaphragm assembly 2 from being separated from the position between the middle frame 6 and the back plate 1.

In this embodiment, the back plate 1 is fixed with the positioning pin 8, and the limiting portion 63 is provided with an avoiding groove 64 or an avoiding hole through which the positioning pin 8 passes. The positioning pins 8 are arranged to further define the position of the middle frame 6, so that the middle frame 6 can not move relative to the back plate 1 and the cover plate 4.

In other embodiments, the avoiding groove 64 is not limited to be provided on the limiting portion 63, and may also be provided on a side surface of the first frame body 61 close to the back plate 1, and the positioning pin 8 is directly in insertion fit with the avoiding groove 64 on the first frame body 61, so as to limit the position of the middle frame 6.

In an embodiment, the outer frame 5 includes a second frame body 51, the second frame body 51 is provided with a notch 52, the second frame body 51 is provided with a first side surface 53 and a second side surface 54 which are connected, the notch 52 is formed between the first side surface 53 and the second side surface 54, the first side surface 53 is parallel to the cover plate 4, the first side surface 53 is abutted to a side surface of the cover plate 4 departing from the back plate 1, and the second side surface 54 is contacted with or spaced from an edge of the cover plate 4. Through set up above-mentioned breach 52 on frame 5, can reduce the installation degree of difficulty of apron 4, when the installation, apron 4 stacks on the frame 5 that makes up, then installs OC3, center 6, optics diaphragm subassembly 2 in proper order again, installs backplate 1 again at last to with backplate 1 and frame 5 fixed connection, can see out from this, apron 4 no longer is the mode of side dress and inserts in the slot that frame 5 set up, effectively prevents that apron 4 surface and frame 5's slot friction from taking place wearing and tearing.

In this embodiment, an adhesive layer is disposed between the cover plate 4 and the first side surface 53. Through setting up the viscose layer, can prevent effectively that apron 4 from taking place relative movement with frame 5 after the assembly.

Further, the first side 53 is perpendicular to the second side 54, and a second buffer layer is disposed between the second side 54 and the edge of the cover plate 4. Through the arrangement of the second buffer layer, on one hand, the edge of the cover plate 4 and the outer frame 5 can be prevented from being damaged due to rigid collision, and on the other hand, the second buffer layer can be used for filling a gap between the edge of the cover plate 4 and the second side surface 54, so that the structural stability is enhanced.

In addition, one side surface of the outer frame 5 close to the back plate 1 is a mounting side surface 55, one end of the mounting side surface 55 far away from the center of the back plate 1 is convexly provided with an abutting part 56, the edge of the back plate 1 abuts against the abutting part 56, and the height of the abutting part 56 protruding from the mounting side surface 55 is not less than the thickness of the back plate 1. The abutting portion 56 can limit the mounting position of the back plate 1, and can prevent the edge of the back plate 1 from being exposed to the outer frame 5, so that the appearance is more beautiful.

In a second aspect, a liquid crystal display is provided, which employs the backlight module. The specific structure of the backlight module refers to the above embodiments.

In a third aspect, a terminal device is provided, which employs the backlight module. The specific structure of the backlight module refers to the above embodiments.

In the description herein, it is to be understood that the terms "upper" and the like are used in a descriptive sense and based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, configuration and operation in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. A backlight module comprises a module body and a frame assembly arranged on the periphery of the module body, wherein the module body comprises a back plate, an optical film assembly, an OC and a cover plate, the optical film assembly, the OC and the cover plate are sequentially arranged on the back plate, the frame assembly comprises an outer frame and a middle frame, the outer frame is detachably connected with the back plate, the middle frame comprises a first frame body, the first frame body is clamped between the cover plate and the back plate, a convex part extending into the OC and the optical film assembly is arranged on one side of the first frame body, the convex part is close to one side of the cover plate and is used for supporting the OC, and the convex part is close to one side of the back plate and is used for compressing the optical film assembly on the back plate.

2. The backlight module as claimed in claim 1, wherein a first buffer layer is disposed between the cover plate and the first frame body.

3. The backlight module as claimed in claim 2, wherein the first buffer layer extends between the protrusion and the cover plate.

4. The backlight module as claimed in claim 1, wherein a position-limiting portion is protruded from a side of the protrusion adjacent to the back plate, and the position-limiting portion is inserted into the hanging hole of the optical film assembly.

5. The backlight module according to claim 4, wherein a positioning pin is fixed on the back plate, and an avoiding groove or an avoiding hole for the positioning pin to pass through is formed in the limiting portion.

6. The backlight module according to any of claims 1 to 5, wherein the outer frame comprises a second frame body, the second frame body is provided with a notch, the second frame body is provided with a first side surface and a second side surface which are connected, the notch is formed between the first side surface and the second side surface, the first side surface is parallel to the cover plate, the first side surface is abutted to a side surface of the cover plate departing from the back plate, and the second side surface is contacted with or spaced from an edge of the cover plate.

7. The backlight module as claimed in claim 6, wherein an adhesive layer is disposed between the cover plate and the first side surface.

8. The backlight module as claimed in claim 6, wherein the first side is perpendicular to the second side, and a second buffer layer is disposed between the second side and the edge of the cover plate.

9. A liquid crystal display panel comprising the backlight module of any one of claims 1 to 8.

10. A terminal device, characterized in that it comprises a backlight module according to any one of claims 1 to 8.

Images