CN100371788C - backlight module of flat panel display - Google Patents

Abstract

The present invention provides a backlight module, comprising a driving circuit, a shielding plate and a back plate. A first through hole is formed on the driving circuit, and a second through hole is formed on the shielding plate. The back plate is provided with at least one latch seat, the latch seat having a column and a radial flange, and the diameter of the radial flange is greater than the diameter of the column. The column of the latch seat passes through the first through hole and the second through hole in sequence, and the driving circuit and the shielding plate are clamped and fixed between the back plate and the radial flange.

Description

Backlight module for flat panel display

technical field

The invention relates to a backlight module, in particular to an assembly structure of the backlight module.

Background technique

The liquid crystal display panel in the liquid crystal display screen itself is not a light-emitting display component, and the required light source needs to be provided by a backlight module. In terms of mechanical properties, the backlight module requires the characteristics of thin thickness, light weight, and impact resistance. Since the performance of the backlight module will directly affect the quality of the LCD screen, it is a very important component in the LCD screen.

Generally speaking, a backlight module is composed of a diffuser plate, a light guide plate, a backlight source and a back plate. FIG. 1 is a partial schematic diagram illustrating a conventional backlight module. The backlight module 100 includes a backplane 110 , a driving circuit 120 and a shielding plate 130 , wherein the driving circuit 120 is used to drive the backlight. Most of the existing backlight module assembly processes use screws to lock the backplane 110 , the driving circuit 120 and the shielding plate 130 . More clearly, the driving circuit 120 is assembled on the backplane 110 first, then the shielding plate 130 is assembled on the driving circuit 120, and finally the locking screws 142 pass through the through holes 132 of the shielding plate 130 and the holes of the driving circuit 120 in sequence. The through hole 122 is used for fixing.

However, the existing backlight module assembly process increases screw cost, prolongs assembly time, and reduces production efficiency due to locking screws, which is not a simple and efficient assembly method.

Contents of the invention

Therefore, the object of the present invention is to provide a backlight module that reduces the amount of screws to save assembly time and screw costs.

According to a preferred embodiment of the present invention, the backlight module includes a driving circuit, a shielding plate and a back plate. A first through hole is formed on the driving circuit, and a second through hole is formed on the shielding plate. The backboard is configured with at least one tenon seat, and the tenon seat has a cylinder and a radial flange, and the diameter of the radial flange is larger than that of the cylinder. The cylinder of the tenon seat passes through the first through hole and the second through hole in sequence, and clamps and fixes the driving circuit and the shielding plate between the back plate and the radial flange.

Therefore, the present invention uses the tenon seat to reduce the amount of screws, which not only reduces the cost of screws, greatly shortens the time required for the assembly process of the backlight module, but also facilitates assembly and increases production efficiency.

Description of drawings

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

Fig. 2 is the schematic diagram of a preferred embodiment of the present invention;

Fig. 3A is a schematic diagram of a preferred embodiment of the tenon seat in Fig. 2;

Fig. 3B is a schematic diagram of another preferred embodiment of the tenon seat in Fig. 2;

4A to 4E are schematic diagrams of several different embodiments of the tenon seat; and

Fig. 5 is a schematic diagram of another preferred embodiment of the present invention.

Detailed ways

The present invention configures at least one tenon seat on the back plate to help fix the driving circuit and the shielding plate, thereby reducing the number of screws used and shortening the assembly time. Furthermore, if the driving circuit needs to be grounded, one of the tenon seats can be replaced by a locking screw, and a shielding plate is used to press the driving circuit to ensure good grounding.

Fig. 2 is a schematic diagram of a preferred embodiment of the present invention. The backlight module 200 includes a driving circuit 220 , a shielding plate (Shielding Plate) 230 and a back plate 210 . A first through hole 222 is formed on the driving circuit 220 , and a second through hole 232 is formed on the shielding plate 230 . The backboard 210 is configured with at least one tenon seat 242 .

FIG. 3A is a schematic diagram of a preferred embodiment of the tenon seat 242 in FIG. 2 . The tenon seat 342 a has a cylinder 344 and a radial flange 346 a, and the diameter of the radial flange 346 a is larger than that of the cylinder 344 . As shown in Figure 2, during assembly, the tenon seat 342 will pass through the first through hole 222 and the second through hole 232 in sequence, that is, the end of the radial flange 346a will pass through the first through hole 222 and the second through hole 222. The two through holes 232 allow the post 344 to stay in the first through hole 222 and the second through hole 232 , so that the driving circuit 220 and the shielding plate 230 are clamped and fixed between the back plate 210 and the radial flange 346 a.

Preferably, the diameter of the radial flange 346 a is larger than that of the second through hole 232 to sandwich the driving circuit 220 and the shielding plate 230 . However, in order to allow the radial flange 346a with a larger diameter to pass through the second through hole 232 with a smaller diameter, and to take into account the convenience of assembly, the material of the tenon seat 342a, especially the material of the radial flange 346a, Preferably it may be an elastic material such as plastic, rubber or other suitable elastic material. In this way, the radial flange 346 a can be squeezed to reduce its diameter to pass through the second through hole 232 , and return to its original larger diameter after passing through the second through hole 232 .

In addition, as shown in FIG. 2 , the backlight module 200 may further include a screw to replace one of the original tenon seats 242 to lock the driving circuit 220 and the shielding plate 230 on the backplane 210 to achieve a ground connection. Even, the shielding plate 230 can be used to press the driving circuit 220 to ensure good grounding. Moreover, the backlight module 200 is preferably a bottom-type backlight module (Bottom Lighting Backlight Module), and the driving circuit 220 is an inverter (Inverter).

In addition to the above-mentioned tenon seat 342a, the present invention also provides several other variations of the tenon seat to illustrate various application modes of the tenon seat.

FIG. 3B is a schematic diagram of another preferred embodiment of the tenon seat 242 in FIG. 2 . The tenon seat 342b has a cylinder 344 and a radial flange 346b, and the diameter of the radial flange 346b is larger than the diameter of the cylinder 344 . In addition, the tenon seat 342b also has a matching part 348 disposed on the other end of the cylinder 344 relative to the radial flange 346b. The diameter of the fitting part 348 is larger than the diameter of the cylinder 344 .

Preferably, the diameter of the matching part 348 is larger than the first through hole 222 shown in FIG. The diameter is equal to that of the first through hole 222 and the second through hole 232 , so that the radial flange 346 b can be matched to clamp and fix the driving circuit 220 and the shielding plate 230 tightly.

In addition, the radial flange of the tenon seat can have additional axial openings or even grooves to further increase the extent to which its diameter can be changed in size. Hereinafter, several embodiments are used for illustration. Figures 4A to 4E are schematic diagrams of several different embodiments of the tenon seat, respectively drawing the top view and even the cross-sectional view of each tenon seat embodiment (as shown in Figure 4A, Figure 4B and Figure 4E), to illustrate its Detailed structure.

As shown in FIG. 4A , the tenon seat 442 a is disposed on the back plate 410 and has a solid radial flange 446 a and a post 444 a. Or as shown in FIG. 4B, the tenon seat 442b is arranged on the back plate 410, and the center of the radial flange 446b also has an axial opening 452, so as to increase the diameter of the radial flange 446b due to extrusion. The degree of variation of the reduction. Moreover, for the convenience of the manufacturing process, the axial opening 452 can also extend downwards into the cylinder 444b at the same time, and is not limited to only exist in the radial flange 446b.

Moreover, at least one groove 454 can radiate outward from the axial opening 452 to make the tenon seat easy to expand outward. As shown in Figure 4C, the tenon seat 442c has two grooves 454; or as shown in Figure 4D, the tenon seat 442d has three grooves 454; or as shown in Figure 4E, the tenon seat 442e has four grooves groove 454 . Of course, the skilled artisan can design other different numbers of grooves according to requirements. Similarly, as shown in FIG. 4E , for the convenience of the manufacturing process, the groove 454 can also extend downwards into the column 444e at the same time, and is not limited to only exist in the radial flange 446e.

Fig. 5 is a schematic diagram of another preferred embodiment of the present invention. The backlight module 500 also includes a lamp holder 512 disposed on the back panel (not shown), and the tenon seat 542 and the lamp holder 512 are integrally formed. More specifically, a tenon seat 542 protrudes from the plastic part of the lamp fixing device 512 , and there is a protruding tenon seat after the back plate is assembled, which can help fix the driving circuit and the shielding plate.

To sum up, the above-mentioned embodiment uses the tenon seat to reduce the amount of screws, which not only reduces the cost of screws, greatly shortens the time required for the assembly process of the backlight module, but also facilitates assembly and increases production efficiency.

Although the present invention has been disclosed in conjunction with the above preferred embodiment, it is not intended to limit the present invention. Any skilled person can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the claims.

Claims (11)

1. A backlight module, comprising: a driving circuit, on which a first through hole is formed; a shielding plate on which a second through hole is formed; and A back plate, configured with at least one tenon seat, the tenon seat has a cylinder and a radial flange, the diameter of the radial flange is larger than the diameter of the cylinder, wherein the cylinder of the tenon seat is in accordance with Through the first through hole and the second through hole, the drive circuit and the shielding plate are interposed and fixed between the back plate and the radial flange. 2. The backlight module as claimed in claim 1, wherein the center of the radial flange further has an axial opening. 3. The backlight module as claimed in claim 2, wherein at least one groove radiates outward from the axial opening, so that the tenon seat is easy to expand outward. 4. The backlight module as claimed in claim 2, wherein the bayonet seat further has a fitting, which is disposed at the other end of the cylinder relative to the radial flange, and the diameter of the fitting is larger than the diameter of the cylinder , to cooperate with the radial flange to sandwich the driving circuit and the shielding plate. 5. The backlight module as claimed in claim 4, wherein a diameter of the matching member is larger than that of the first through hole. 6. The backlight module as claimed in claim 1, wherein the length of the column is equal to the sum of the thicknesses of the driving circuit and the shielding plate. 7. The backlight module as claimed in claim 1, wherein a diameter of the radial flange is larger than that of the second through hole. 8. The backlight module as claimed in claim 1, wherein the backlight module further comprises a light tube fixing device disposed on the back plate, and the tenon seat is integrally formed with the light tube fixing device. 9. The backlight module as claimed in claim 1, wherein the tenon seat is made of elastic material. 10. The backlight module as claimed in claim 1, wherein the backlight module further comprises a screw, and the driving circuit and the shielding plate are locked on the backplane to achieve a ground connection. 11. The backlight module as claimed in claim 1, wherein the driving circuit is a converter.

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