CN100371788C

CN100371788C - Backlight module of planar display device

Info

Publication number: CN100371788C
Application number: CNB2005100652148A
Authority: CN
Inventors: 陈信利
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2005-04-14
Filing date: 2005-04-14
Publication date: 2008-02-27
Anticipated expiration: 2025-04-14
Also published as: CN1664674A

Abstract

The present invention provides a back light module. The present invention comprises a drive circuit, a shielding plate and a back plate, wherein the drive circuit is provided with a first via hole, and the shielding plate is provided with a second via hole; the back plate is provided with at least one trip seat which is provided with a cylindrical body and a radial flange, the diameter of the radial flange is larger than that of the cylindrical body, and the cylindrical body of the trip seat orderly penetrates through the first and the second via holes to clamp and fix the drive circuit and the shielding plate between the back plate and the radial flange.

Description

The backlight module of flat-panel screens

Technical field

The present invention relates to a kind of backlight module, particularly relate to a kind of package assembly of backlight module.

Background technology

Display panels in the LCD Panel itself is not a luminous display assembly, and needing provides required light source by backlight module.Aspect engineering properties, thin, in light weight, the impact-resistant characteristic of backlight module required thickness.Because the performance quality of backlight module can directly have influence on the quality of LCD Panel, be considerable spare part in the LCD Panel therefore.

Generally speaking, backlight module is made up of diffuser plate, light guide plate, backlight and backboard.Fig. 1 is the part synoptic diagram that illustrates existing backlight module.This backlight module 100 comprises a backboard 110, one drive circuit 120 and a shield plate 130, and wherein driving circuit 120 is in order to drive backlight.Existing backlight module assembling manufacture craft adopts screw to lock backboard 110, driving circuit 120 and shield plate 130 mostly.More clearly say, earlier with backboard 110 on 120 groups of the driving circuits, again with 130 groups of shield plate on driving circuit 120, lock at last that screw 142 passes the through hole 132 of shield plate 130 in regular turn and the through hole 122 of driving circuit 120 is fixed.

Yet existing backlight module assembling manufacture craft but can increase the screw cost because of locking screw, spins out built-up time and reduce prouctiveness, is not a kind of simple and efficient assembling mode.

Summary of the invention

Therefore the object of the present invention is to provide a kind of backlight module, reduce the screw consumption to save built-up time and screw cost.

According to a preferred embodiment of the present invention, this backlight module comprises one drive circuit, a shield plate and a backboard.Form one first through hole on the driving circuit, and form one second through hole on the shield plate.Backboard disposes at least one trip base, and trip base has a cylinder and a radial flange, and the diameter of radial flange is greater than the diameter of cylinder.The cylinder of trip base passes first through hole and second through hole in regular turn, driving circuit and shield plate is inserted and put be fixed on the backboard and between the radial flange.

Therefore, the present invention uses trip base to reduce the consumption of screw, not only reduces the screw cost, shortens the required time of assembling manufacture craft of backlight module significantly, and easy to assembly and can increase prouctiveness.

Description of drawings

Fig. 1 is the part synoptic diagram of existing backlight module;

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

Fig. 3 A is the synoptic diagram of a preferred embodiment of the trip base of Fig. 2;

Fig. 3 B is the synoptic diagram of another preferred embodiment of the trip base of Fig. 2;

Fig. 4 A to Fig. 4 E is the synoptic diagram of several different embodiment of trip base; And

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

Embodiment

The present invention disposes at least one trip base at backboard, helps fixed drive circuit and shield plate, therefore can reduce the usage quantity of screw, and shortens built-up time.Moreover, when needing ground connection, one of them trip base can be replaced to lock screw, and use shield plate to push down driving circuit as if driving circuit, good to guarantee ground connection.

Fig. 2 is the synoptic diagram of a preferred embodiment of the present invention.This backlight module 200 comprises one drive circuit 220, a shield plate (Shielding Plate) 230 and one backboard 210.Form one first through hole 222 on the driving circuit 220, and form one second through hole 232 on the shield plate 230.At least one trip base 242 of backboard 210 configurations.

Fig. 3 A is the synoptic diagram of a preferred embodiment of the trip base 242 of Fig. 2.Trip base 342a has a cylinder 344 and a radial flange 346a, and the diameter of radial flange 346a is greater than the diameter of cylinder 344.As shown in Figure 2, when assembling, trip base 342 can pass first through hole 222 and second through hole 232 in regular turn, promptly pass first through hole 222 and second through hole 232 by its radial flange 346a end, cylinder 344 is stayed in first through hole 222 and second through hole 232, so driving circuit 220 and shield plate 230 are inserted and put and be fixed between backboard 210 and the radial flange 346a.

Be preferably, the diameter of radial flange 346a is greater than second through hole 232, to insert and put driving circuit 220 and shield plate 230.Yet, in order to allow the bigger radial flange 346a of diameter can pass through the second less through hole 232 of diameter, and take into account easy to assembly considering, the material of trip base 342a, especially the material of its radial flange 346a, preferably can be resilient material, for example plastics, rubber or other resilient material that is suitable for.So, radial flange 346a can be extruded and dwindle its diameter dimension passing second through hole 232, and pass second through hole 232 after revert to originally bigger diameter dimension.

In addition, as shown in Figure 2, backlight module 200 also can comprise a screw, replace originally a plurality of trip base 242 one of them, driving circuit 220 and shield plate 230 are locked on backboard 210, to reach ground connection connection.Even, more can use shield plate 230 to push down driving circuit 220, good to guarantee ground connection.And backlight module 200 is preferably bottom-lighting type back light module (Bottom LightingBacklight Module), and driving circuit 220 then is a converter (Inverter).

Except above-mentioned trip base 342a, the present invention also provides the embodiment of several other different trip base to change, so that various trip base application mode to be described.

Fig. 3 B is the synoptic diagram of another preferred embodiment of the trip base 242 of Fig. 2.Trip base 342b has a cylinder 344 and a radial flange 346b, and the diameter of radial flange 346b is greater than the diameter of cylinder 344.In addition, this trip base 342b also has a counterpart 348, is disposed at the other end of cylinder 344 with respect to radial flange 346b.The diameter of counterpart 348 is greater than the diameter of cylinder 344.

Preferably, the diameter of counterpart 348 is greater than as shown in Figure 2 first through hole 222, the length of cylinder 344 equates with the sum total of the thickness of driving circuit 220 and shield plate 230 substantially, and the diameter of cylinder 344 equates with first through hole 222 and second through hole 232, so can cooperate radial flange 346b with closely clamping fixed drive circuit 220 and shield plate 230.

In addition, the radial flange of trip base more can have extra axial aperture or even groove, to increase the degree of its diameter variable-size further.Below promptly illustrate with several embodiment.What Fig. 4 A to Fig. 4 E illustrated is the synoptic diagram of several different embodiment of trip base, and the vertical view of each trip base embodiment that draws respectively even its cut-open view (as Fig. 4 A, Fig. 4 B and Fig. 4 E) are to illustrate its thin portion structure.

Shown in Fig. 4 A, trip base 442a is configured on the backboard 410, and has solid radial flange 446a and cylinder 444a.Or shown in Fig. 4 B, trip base 442b is configured on the backboard 410, and the center of its radial flange 446b also has an axial aperture 452, to increase radial flange 446b diameter because of the reducible intensity of variation of extruding.And convenient for manufacture craft, this axial aperture 452 also can extend downward among the cylinder 444b simultaneously, is not limited to only can exist among the radial flange 446b.

And axial aperture 452 more outwards spoke goes out at least one groove 454, makes trip base be easy to expand outwardly.Shown in Fig. 4 C figure, trip base 442c has twice groove 454; Or shown in Fig. 4 D, trip base 442d has three road grooves 454; Or shown in Fig. 4 E, trip base 442e has four road grooves 454.Certainly, now the operator can design the groove of other different numbers on demand.Similarly, shown in Fig. 4 E, convenient for manufacture craft, this groove 454 also can extend downward among the cylinder 444e simultaneously, is not limited to only can be present among the radial flange 446e.

Fig. 5 is the synoptic diagram of another preferred embodiment of the present invention.Backlight module 500 comprises that also a fluorescent-tube fixer (Lamp Holder) 512 is configured on the backboard (not illustrating), and trip base 542 is formed in one with fluorescent-tube fixer 512.More particularly, be that the working of plastics from fluorescent-tube fixer 512 grows a trip base 542, behind backboard on the group, have a trip base that protrudes, can help fixed drive circuit and shield plate.

In sum, the foregoing description is to use trip base to reduce the consumption of screw, not only reduces the screw cost, shortens the required time of assembling manufacture craft of backlight module significantly, and easy to assembly and can increase prouctiveness.

Though disclosed the present invention in conjunction with an above preferred embodiment; yet it is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; can be used for a variety of modifications and variations, so protection scope of the present invention should be with being as the criterion that claim was defined.

Claims

1. backlight module comprises:

One drive circuit forms one first through hole on it;

One shield plate forms one second through hole on it; And

One backboard, dispose at least one trip base, this trip base has a cylinder and a radial flange, the diameter of this radial flange is greater than the diameter of this cylinder, wherein this cylinder of this trip base passes this first through hole and this second through hole in regular turn, this driving circuit and this shield plate is inserted and put be fixed on this backboard and between this radial flange.

2. backlight module as claimed in claim 1, wherein the center of this radial flange also has an axial aperture.

3. backlight module as claimed in claim 2, wherein the also outside spoke of this axial aperture goes out at least one groove, makes this trip base be easy to expand outwardly.

4. backlight module as claimed in claim 2, wherein this trip base also has a counterpart, be disposed at the other end of this cylinder with respect to this radial flange, the diameter of this counterpart is greater than the diameter of this cylinder, to cooperate this this driving circuit of radial flange clamping and this shield plate.

5. backlight module as claimed in claim 4, wherein the diameter of this counterpart is greater than this first through hole.

6. backlight module as claimed in claim 1, wherein the length of this cylinder equals the sum total of the thickness of this driving circuit and this shield plate.

7. backlight module as claimed in claim 1, wherein the diameter of this radial flange is greater than this second through hole.

8. backlight module as claimed in claim 1, wherein this backlight module comprises that also a fluorescent-tube fixer is configured on this backboard, and this trip base and this fluorescent-tube fixer are one-body molded.

9. backlight module as claimed in claim 1, wherein the material of this trip base is a resilient material.

10. backlight module as claimed in claim 1, wherein this backlight module also comprises a screw, this driving circuit and this shield plate is attached on this backboard, to reach ground connection connection.

11. backlight module as claimed in claim 1, wherein this driving circuit is a converter.