WO2013071649A1

WO2013071649A1 - Backplane, backlight module, and liquid crystal display device

Info

Publication number: WO2013071649A1
Application number: PCT/CN2011/083225
Authority: WO
Inventors: 黄冲; 郭仪正; 萧宇均
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2011-11-18
Filing date: 2011-11-30
Publication date: 2013-05-23
Also published as: CN102392995B; CN102392995A

Abstract

A backplane, backlight module, and liquid crystal display device. The backplane of the backlight module comprises a plurality of brackets (110) assembled one with the others as well as a fastening mesh fixed between said brackets (110) and used for the fastening of functional cards (430) of the backlight module. Functional cards (430) of the backlight module such as PCB boards and similar components can be fixed on the fastening mesh (400) of the backplane, while the brackets (110) and said fastening mesh (400) can all be standardized for general-purpose use.

Description

Backboard, backlight module and liquid crystal display device

[Technical Field]

The present invention relates to the field of liquid crystal display, and more particularly to a backplane, a backlight module, and a liquid crystal display device.

【Background technique】

The liquid crystal display device comprises a liquid crystal panel and a backlight module, and the back of the backlight module has a back plate for sealing the module and fixing the in-mold component. The existing backsheets all use a monolithic backsheet, which is generally integrally formed by metal stamping or plastic injection, which makes the product relatively heavy and the material cost of the product is relatively high. For large-sized back sheets, the cost is higher due to the use of larger stamping equipment, and the corresponding mold size is large, the structure is complicated, and the mold cost is also high. With the increasingly fierce market competition, it is becoming more and more important to effectively reduce the design cost, so the material cost saving and the assembly process are an important direction for designers.

In addition, due to different backlight modules, the corresponding component size and mounting position are different. The integrated backplane cannot achieve standardized design and has poor versatility.

[Summary of the Invention]

The technical problem to be solved by the present invention is to provide a standardized and generalized backplane, backlight module and liquid crystal display device.

The object of the present invention is achieved by the following technical solutions:

A backplane of a backlight module includes a plurality of spliced brackets and a fixed grid of functional cards for securing the backlight module between the brackets. The functional card is used to fix components of a backplane module such as a PCB.

Preferably, the fixed mesh includes a plurality of ribs, and the plurality of ribs intersect vertically and horizontally to form a plurality of meshes; the two ends of the ribs are respectively fixed on different brackets. This is a specific structure of a fixed grid, using standard ribs as the basic components, forming a fixed grid, a structural unit, and good versatility. Preferably, the ribs are rigid ribs, and a plurality of mesh holes of constant aperture size are formed. The rigid ribs have high strength, are not easily deformed, and have good load bearing capacity. Moreover, the mesh size is fixed, and the lock attachment is fixed to the mesh hole, and the connection strength is high.

Preferably, the ribs are elastic ribs, and a plurality of mesh holes of variable aperture size are formed. The elastic ribs have good toughness and can be applied to lock accessories of different sizes and shapes within a certain range, and the versatility is good.

Preferably, the plurality of ribs are fixed at their intersections. After the connection is fixed at the intersection, the mesh size is fixed, and the lock attachment is fixed to the mesh, and the connection strength is high.

Preferably, the longitudinal ribs and the transverse ribs are crossed by each other. Crossing the forks can increase the strength of the backboard, and the intersections do not need to be fixedly connected. Therefore, the size of the mesh has a certain adjustment range, and can be applied to lock accessories of different sizes and shapes, and has good versatility.

Preferably, the plurality of ribs are divided into two groups of longitudinally arranged and laterally arranged, and two sets of ribs are respectively fixed on both sides of the backboard. Thus, there is a certain distance between the longitudinal ribs and the horizontal ribs. In each set of ribs, a sliding groove is formed between the adjacent two ribs, which facilitates the sliding of the functional card in the sliding slot, and needs to be fixed when fixing It can be fixed directly to the chute, thus providing a more flexible fixing method.

Preferably, the fixed grid has two layers, which are respectively fixed on two sides of the backboard, and the fixed grid of the double layer structure has higher strength.

A backlight module includes the above-mentioned backplane, and one or more functional cards are disposed on a fixed grid of the backboard.

Preferably, the functional card comprises one or more of a lock attachment and a heat sink. This is the specific form of the functional card, the lock attachment is used to fix components such as the PCB board, and the heat sink is used for heat dissipation of the light source.

Preferably, the locking portion of the functional card fixed to the fixed grid is a standard component. The use of standard snaps improves versatility, reducing costs and increasing productivity.

A liquid crystal display device includes the above backlight module.

The invention adopts a bracket and a fixed grid as the basic components of the backboard, and the bracket serves as a main load-bearing component of the backboard, and the fixed grid is fixed between the brackets, and the components of the PCB of the backlight module are fixed on the fixed grid. on. In this way, on the one hand, the backboard mainly relies on the frame to bear the weight, and the overall strength of the backboard is high; The bracket can be designed as a general-purpose profile. It can only be cut and spliced according to different sizes of the backboard. The fixed grid can also be designed into a standard size grid, which can be cut into different sizes according to actual needs. Both the bracket and the fixed grid can be standardized and generalized, and can form a standard, universal backplane, backlight module and liquid crystal display device.

[Description of the Drawings]

Figure 1 is a schematic view of a back plate of the present invention;

2 is a schematic view of a backplane fixed PCB board of the present invention;

3 is a schematic view of a first type of lock attachment according to an embodiment of the present invention;

4 is a schematic view of a second type of lock attachment according to an embodiment of the present invention;

Figure 5 is a schematic view of a third type of lock attachment according to an embodiment of the present invention;

6 is a schematic view of a fourth type of lock attachment according to an embodiment of the present invention;

7 is a schematic view of a first type of lock attachment according to Embodiment 2 of the present invention;

8 is a schematic view of a second type of lock attachment according to Embodiment 2 of the present invention;

9 is a schematic view of a third type of lock attachment according to Embodiment 2 of the present invention;

Wherein: 100, frame; 110, bracket; 111, upper bracket; 112, right bracket; 113, lower bracket; 114, left bracket; 115, intermediate bracket; 115, intermediate bracket; 130, reinforcing member; 300, lock attachment; 310, tapered apex; 320, claws; 330, threaded holes; 340, rivets; 350, screws; 400, fixed grid; 410, ribs; 420, mesh; 430, functional Card; 500, PCB board.

【detailed description】

The invention will now be further described with reference to the drawings and preferred embodiments.

A liquid crystal display device includes a liquid crystal panel and a backlight module, and a back plate is disposed at the bottom of the backlight module. The back panel includes a frame 100 comprised of a plurality of brackets 110 having a grid therein. As shown in FIG. 1 , the bracket 110 includes an upper bracket 111 , a lower bracket 113 , a left bracket 114 , and a right branch connected end to end . The frame 112 is a large frame 100 constituting the entire back plate. The large frame 100 is further provided with two intermediate brackets 115. The two ends of the intermediate bracket 115 are respectively fixed on the upper and lower brackets 110. The grids in the frame 100 are fixed on the respective brackets 110, and the components of the PCB board 500 and other backlight modules are fixed on the grid by the functional clips 430, and the functional card members 430 include the lock attachments 300 and the heat sinks. One or more of the clamping portions fixed to the fixed grid 400 are standard parts to improve versatility, which is advantageous for reducing cost and improving production efficiency. Of course, under the strength of the support frame 100, the two intermediate supports 115 can also be omitted to save costs. The splicing portion of the bracket may be provided with an angle-shaped reinforcing member 130. The reinforcing member 130 is disposed at four angular positions of the frame, and each reinforcing member 130 includes two connecting portions 131, and the connecting portion 131 is used in the frame. The bracket connection is fixed. The reinforcing member 130 is formed by body molding, has high strength, can improve the splicing strength, and the connecting portion 131 can be made into a standard part, so that the bracket can be made into a standard profile, and the cutting can be performed according to the backing plate of different sizes, and the versatility is high. . The reinforcing member 130 is also formed in a snap-fit form and is fixed to the mesh 420 of the fixed mesh 400.

The fixed mesh 400 includes a plurality of ribs 410, and the plurality of ribs 410 are vertically and horizontally intersected to form a plurality of meshes 420; the two ends of the ribs 410 are respectively fixed on different brackets 110. The ribs 410 may be rigid ribs 410 to form a plurality of meshes 420 having a constant aperture size; the ribs 410 may also be elastic ribs 410 to form a plurality of apertures 420 having variable aperture sizes.

The plurality of ribs 410 may be integrally formed or may be fixedly joined at their intersections to form a fixed mesh 400 to enhance the strength of the mesh; of course, between the longitudinal ribs 410 and the lateral ribs 410 may also be employed. The way of crossing the cross can also enhance the mesh strength, and the mesh size can have a certain adjustment space. The longitudinal ribs 410 and the lateral ribs 410 may be respectively fixed on both sides of the backboard or may be fixed on the same side of the backboard.

In addition, the fixed mesh 400 may be provided with two layers, which are respectively fixed on both sides of the back plate.

As shown in FIG. 2, the fixed grid 400 is used to fix the PCB board 500. In the area where the fixed circuit board is required, a convex hull is disposed, and the bottom of the convex hull is fixed to the mesh 420 of the fixed grid 400 by riveting, screwing, or the like. Then, the PCB board 500 is then fixed on the convex hull.

Embodiment 1 As shown in FIG. 3-6, the top of the lock attachment 300 fixed to the PCB board is provided with a tapered apex 310, and a plurality of elastic claws 320 are extended at the bottom of the apex to form a fixed PCB board 500. The snap attachment structure; the lock attachment 300 can be integrally formed by plastic.

The lock attachment 300 and the back plate are provided with a fixing structure for fixing itself to the back plate, and the fixing structure may be any form of a stud, a screw or a threaded hole, and of course, the same card as the top may be used. Correspondingly, a mounting hole for fixing the lock attachment 300 is disposed on the back plate, and the lock attachment 300 is mounted to the back plate through the mounting hole. The root of the lock attachment 300 may also be a flat surface, which is not fixed to the back plate, and is only fixed to the PCB board 500, and has pure support for the PCB board 500.

Embodiment 2

As shown in Figures 7 ~ 9, there is another type of lock attachment 300, which is a convex hull that exists as a separate part. Such a convex hull is not formed on the backboard when the backboard is produced, but when a convex hull is required. The convex hull is mounted on the corresponding position of the backboard 400 to achieve flexible use of the convex hull to locate components of the PCB board 500 of various sizes.

As shown in FIG. 7, the convex hull has a threaded hole 330 for mounting a component such as a fixed PCB board 500, the threaded hole 330 is straight through the independent convex hull so that the independent convex hull can be fixed from below by the screw 350. On the backplane 400, the PCB board 500 can be fixed at the same time. Accordingly, the backboard 400 should be provided with a convex package mounting hole, such as a through hole or a sliding slot, corresponding to the threaded hole 330 of the convex package. The convex hull can be fixed to the backing plate 400. Similarly, it is also possible to fix the PCB board 500, the convex hull and the back board with only one screw-fit nut.

As shown in Fig. 8, the PCB board 500 is fixed to the convex hull by screws 350. Similarly, the convex hull is also fixed to the back board by screws 350 and nuts 812.

In order to facilitate the installation, the convex hull can be configured as a rivet-like structure, that is, the rivet and the convex hull are integrally formed. As shown in FIG. 9, the connection between the lower end portion of the convex hull and the back plate 400 is a riveted form, that is, the convex hull passes through the rivet 340. Riveted to the backing plate 400. The way of riveting is relatively quick compared to the way the screws are connected, and can be done by machine to increase the efficiency of production.

The convex hull is fixed to the back plate 400 by the rivet 340, and then the PCB board 500 is fixed by the screw 350 On the convex hull, the locking of the PCB board 500 is completed.

In order to save materials and facilitate processing, the convex hull can be directly stamped from the plate member. As shown in Fig. 10, the inside of the convex hull is a hollow structure, and the whole is made of a plate material, which saves material and is convenient to manufacture.

Of course, the shape of the independent convex hull described in this embodiment is not limited to the tapered sectional shape shown in the drawing, and the corresponding use can be achieved with respect to other shapes such as a square.

In this embodiment, according to the size of the PCB board 500 in the backlight module, corresponding convex hulls are disposed at corresponding positions; meanwhile, corresponding embossing numbers are set according to different numbers of PCB boards 500 components.

The above is a further detailed description of the present invention in connection with the specific preferred embodiments. It is not intended that the specific embodiments of the invention are limited to the description. It will be apparent to those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.

Claims

Rights request

A backplane for a backlight module, comprising: a plurality of spliced brackets, and a fixed grid of the functional clips for fixing the backlight module fixed between the brackets.

2. The backplane of a backlight module according to claim 1, wherein the fixed grid comprises a plurality of ribs, the plurality of ribs intersecting vertically and horizontally to form a plurality of meshes; Both ends of the rib are respectively fixed on different brackets.

3. The back sheet of a backlight module according to claim 2, wherein the ribs are rigid ribs, and a plurality of mesh holes having a constant aperture size are formed.

4. The back sheet of a backlight module according to claim 2, wherein the ribs are elastic ribs, and a plurality of mesh holes having variable aperture sizes are formed.

5. The backsheet of a backlight module according to claim 2, wherein the plurality of ribs are fixed at their intersections.

6. The back sheet of a backlight module according to claim 2, wherein the longitudinal ribs and the lateral ribs are crossed by each other.

The backplane of a backlight module according to claim 2, wherein the plurality of ribs are divided into two groups of longitudinally arranged and laterally arranged, and two sets of ribs are respectively fixed on the backboard. Two sides.

8. The backplane of a backlight module according to claim 1, wherein the fixed grid has two layers and is respectively fixed on both sides of the backboard.

9. A backlight module, comprising: a backplane according to claim 1, wherein the backplane comprises a plurality of brackets spliced together, and a backlight module fixed between the brackets for fixing the backlight module A fixed grid of functional cards; one or more functional cards are disposed on the fixed grid of the back panel.

The backlight module of claim 9, wherein the fixed grid comprises a plurality of ribs, the plurality of ribs intersecting vertically and horizontally to form a plurality of meshes; The two ends are respectively fixed on different brackets.

11. A backlight module as claimed in claim 10, wherein the plurality of ribs are fixed at their intersections.

12. A backlight module as claimed in claim 10, wherein the longitudinal ribs and the lateral ribs are crossed by each other.

13. The backlight module as claimed in claim 10, wherein the plurality of ribs are divided into two groups of longitudinally arranged and laterally arranged, and two sets of ribs are respectively fixed on both sides of the backing plate.

14. The backlight module as claimed in claim 9, wherein the fixed grid has two layers and is respectively fixed on both sides of the backboard.

The backlight module of claim 9, wherein the functional card comprises one or more of a lock attachment and a heat sink.

The backlight module according to claim 9, wherein the functional portion of the functional card and the fixed grid is a standard member.

A liquid crystal display device, comprising the backlight module of claim 9, wherein the backlight module comprises a backboard, the backboard comprises a plurality of brackets spliced together, and is fixed on the bracket A fixed grid between the functional cards for fixing the backlight module; one or more functional cards are disposed on the fixed grid of the back plate.

The liquid crystal display device according to claim 11, wherein the fixed grid comprises a plurality of ribs, the plurality of ribs intersecting vertically and horizontally to form a plurality of meshes; The two ends are respectively fixed on different brackets.

A liquid crystal display device according to claim 18, wherein said plurality of ribs are fixed at intersections thereof.

20. A liquid crystal display device according to claim 18, wherein the plurality of ribs are divided into two groups of longitudinally arranged and laterally arranged, and two sets of ribs are respectively fixed on both sides of the backing plate.

A liquid crystal display device according to claim 17, wherein the fixed grid has two layers and is fixed to both sides of the back sheet.