CN100365486C

CN100365486C - Backlight module

Info

Publication number: CN100365486C
Application number: CNB2005101037803A
Authority: CN
Inventors: 周信宏
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2005-09-23
Filing date: 2005-09-23
Publication date: 2008-01-30
Anticipated expiration: 2025-09-23
Also published as: CN1743919A

Abstract

The present invention discloses a backlight module which comprises a light emitting diode circuit board, a light emitting diode and a driving circuit board, wherein the light emitting diode circuit board is provided with a first surface and a second surface, and a first connecting head is arranged on the surface of the second surface. The light emitting diode is electrically connected with the first connecting head. The surface of the driving circuit board is provided with a second connecting head, and the second connecting head is combined with the first connecting head. The driving circuit board is directly assembled with the light emitting diode circuit board via the mutual scarf joint of the first connecting head and the second connecting head in order to drive the light emitting diode on the light emitting diode circuit board. The present invention does not need connecting wires, and thus, the trouble of distributing the wires is avoided; simultaneously, an available space is added to the backlight module, and the flexibility of design can be greatly improved for designers besides the simplicity of the design.

Description

Backlight module

Technical field

The present invention relates to a kind of backlight module, relate in particular to a kind of backlight module that can assemble easily.

Background technology

Now, LCD generally is used for various information display devices, its primary structure can be divided into liquid crystal panel and backlight module two large divisions, and liquid crystal panel roughly comprises assemblies such as ITO conducting glass substrate, liquid crystal layer, alignment film, color filter, polaroid; Backlight module mainly comprises light source, light guide plate, prismatic lens, diffuser plate and reflector plate and blooming miscellaneous, provides light source by backlight module to liquid crystal panel, shows purpose to reach information.The sign of lcd products integral body is subjected to the reciprocal effect of all intrawares, and wherein backlight module plays an important role on screen intensity, uniformity coefficient, contrast and visual angle.

In backlight module, the light source that is adopted comprises cold cathode fluorescent lamp pipe (Cold CathodeFluorescent Lamp now; CCFL), external electrode fluorescent lamp (External Electrode FluorescentLamp; EEFL) or light emitting diode (Light Emitted Diode; LED).Wherein light emitting diode is the luminescence component of being made by semiconductor material, and assembly has two electrode terminals, applies voltage between terminal, and the combination by electronics electricity hole excites energy and disengages with the form of light.Light emitting diode has the advantages such as vibration strength that volume is little, the life-span is long, driving voltage is low, power consumption is little and good, therefore more and more comes into one's own.

In addition, in backlight module, be typically provided with drive circuit board, it is used for controlling the wherein power supply of light source.Because drive circuit board can produce high temperature, in order to reduce the influence of drive circuit board, usually drive circuit board is arranged at the back of backlight module, and drive circuit board need be connected with light source in the backlight module by various connecting lines to LCD.

Yet, utilize connecting line carry out ways of connecting in practice except that the wiring complexity, be difficult for the assembling, exist connecting line to be difficult for reason line problem fixing, that connecting line is entangled with easily toward contact.

What is more, because light emitting diode bulb or light-emitting diode (LED) module kind that present light emitting diode supplier is provided are numerous, makes light emitting diode comparatively complicated in the utilization design of backlight module.When the deviser uses the complicated light-emitting diode (LED) module of these kinds, also need consider its connecting line cabling mode separately, thereby make design become complicated more.In addition, different connecting line fixed forms have also increased the difficulty of assembling.

Therefore, the packaging efficiency that how effectively solve aforementioned reason line problem, improves LCD simultaneously is the direction that those skilled in the art make great efforts.

Summary of the invention

In view of the above, the technical problem to be solved in the present invention provides a kind of backlight module, and it can exempt the puzzlement of reason line, for the deviser, except that design is easier, also can improve the dirigibility of design greatly.Backlight module provided by the present invention comprises LED circuitboard, light emitting diode and drive circuit board.

LED circuitboard has first surface and second surface, and second surface is provided with first connector (Connector).

Light emitting diode is embedded in the LED circuitboard, and itself and first connector electrically connect.

Drive circuit board has second connector, and this second connector can combine with first connector.

Wherein, first connector cooperates with second connector is concavo-convex each other, that is, if a connector is a nose, another connector is recessed end, and both are chimeric mutually.

Chimeric mutually by means of first connector and second connector can make drive circuit board and LED circuitboard electrically connect, thereby with the light emitting diode on the drive circuit board driven for emitting lights diode circuit plate.Thus, need not use connecting line, thereby exempt the puzzlement of reason line, also can increase in the backlight module and can concerning the deviser, except that design is easier, also improve the dirigibility of design greatly for the space that utilizes.

Description of drawings

For further specifying advantage of the present invention and design, the specific embodiment of the present invention is elaborated below in conjunction with accompanying drawing.

Figure 1A is the cut-open view of the present invention's one preferred implementation;

Figure 1B is the three-dimensional exploded view of the present invention's one preferred implementation primary clustering;

Fig. 2～4 are embedded into the synoptic diagram of the different embodiments in the LED circuitboard for light emitting diode among the present invention.

Description of reference numerals

1 backlight module, 111 first surfaces

10 backboards, 112 second surfaces

11 LED circuitboards, 113 first connectors

12 light emitting diodes, 121 bases

13 drive circuit boards, 122 luminous ends

14 frameworks, 131 second connectors

101 through holes, 15 heat conducting films

Embodiment

See also Figure 1A, this figure is the schematic side view of a preferred implementation of the disclosed backlight module of the present invention.Figure 1B is the decomposing schematic representation of primary clustering among Figure 1A.In the present embodiment, backlight module 1 comprises backboard 10, LED circuitboard 11, light emitting diode 12 and drive circuit board 13.

Backboard 10 (back bezel) can be made by aluminium, plastics or various material, and its periphery has sidewall, and accommodation space as the formation shallow slot.In generalized case, backlight module also has framework (frame) 14, and it can be assembled with backboard 10, and can will be placed in wherein as LED circuitboard 11, light emitting diode 12 or other optical module (as diffuser plate, reflector plate).In addition, in the present embodiment, backboard 10 also has the through hole 101 that connects backboard.

LED circuitboard 11 can be various substrates (as printed circuit board (PCB)) with wiring, and it has first surface 111 and over against the second surface 112 of this first surface, and also is provided with first connector 113 on second surface 112.More particularly, the second surface 112 of LED circuitboard 11 is for being distributed with the wiring surface of lead, and first connector 113 can be plug, also can be socket.In the present embodiment, it is to be directly welded on the second surface 112 of LED circuitboard 11 for the socket that inserts.

LED circuitboard 11 is located on the backboard 10 (be backboard 10 formed with framework 14 accommodation space in), and its second surface 112 passes from the through hole 101 of backboard 10 towards backboard 10, the first connectors 113.

Light emitting diode 12 is embedded in the LED circuitboard 11 and with first connector 113 and electrically connects.Say that further light emitting diode 12 can be divided into base 121 and luminous end 122.The electrode pin of base 121 can be welded on the first surface 111 or second surface 112 of LED circuitboard 11, to accept electric power.The light of electric signal control autoluminescence end 122 outgoing that received by first connector 131.

If being designed to electrode pin with base 121 is welded in and then is particularly suitable on the second surface 112 being used with first connector 113 of the present invention.

Because, the first surface 111 that is divided into LED circuitboard 11 separately when base 121 and first connector 113 is during with

second surface

112,11 need of LED circuitboard are selected multilayer board or double-sided printed-circuit board for use, by via conducting first surface 111 and second surface 112, this mode is comparatively complicated again.In other words, preferred situation is that the base 121 and first connector 113 are located at same wiring surface.Therefore, in the present embodiment, base 121 is welded on the second surface 112 of LED circuitboard 11, and first connector 113 also is located on the second surface 112.

Moreover, because the circuit in the base 121 often is the main thermal source of light emitting diode 12, when on the second surface 112 that base 121 is welded in LED circuitboard 11 and when making its luminous end 122 be exposed to outside the first surface, base 121 and luminous end 122 lay respectively at the both sides of LED circuitboard 11, the unlikely light extraction efficiency that influences backlight module integral body of the heat that base 121 is distributed.Under preferable situation, also can between backboard 10 and light emitting diode 12, heat conducting film 15 be set, disperse heat that base 121 was shed is imported in the backboard 10.

For above-mentioned reasons, in backlight module of the present invention, be particularly suitable for the base 121 of light emitting diode 12 is welded on the second surface 112.

Need to prove especially, can adopt various embodiment that light emitting diode 12 is embedded in the LED circuitboard 11, see also Fig. 2, Fig. 3 and Fig. 4.Though in these embodiments, be that example describes all with a light emitting diode, in practice, in backlight module, can install a plurality of light emitting diodes, be not limited only to a light emitting diode.

As shown in Figure 2, LED circuitboard 11 can have hole, light emitting diode 12 can be embedded in this hole.

And as shown in Figure 3, LED circuitboard 11 can have groove, light emitting diode 12 can be arranged in this groove.

And for example shown in Figure 4, LED circuitboard 11 can comprise two sub-circuit boards, light emitting diode 12 can be arranged between described two sub-circuit boards, that is, and by two sub-circuit board clampings.

Please consult Figure 1A and Figure 1B once more.Wherein, drive circuit board 13 is for being provided with the circuit board of power drives chip, and it can be in order to the power supply of control to light emitting diode 12 power supplies, promptly in order to activate the light source of backlight module 1.And, being provided with second connector 131 on the surface of drive circuit board 13, this second connector 131 cooperates with first connector 113 is concavo-convex each other.For example, in the present embodiment, first connector 113 is for having the socket of groove, and 131 plugs for giving prominence to of second connector can be inserted in first connector 113.

By above stated specification as can be known, in the present invention, LED circuitboard and drive circuit board are directly chimeric and realize both electric connections by means of first connector and second connector.It need not use connecting line, thereby can solve the problem of being entangled with of connecting line.In addition, the deviser also needn't consider the fixed form and the trace configurations mode of connecting line, can reduce the required cabling space that takies of connecting line whereby, having increased can be for the space that utilizes in the backlight module, concerning the deviser, except that design is easier, also improved the dirigibility of design greatly.

Moreover, when backlight module of the present invention is assembled, can carry out according to the following steps:

Light emitting diode 12 is embedded in the LED circuitboard 11 with aforementioned manner; After making first connector 113 of LED circuitboard 11 pass the through hole 101 of backboard, LED circuitboard 11 is fixed on the backboard 10; The position of the location positioning drive circuit board 13 of foundation first connector 113 can embed in first connector 113 second connector 131 of drive circuit board 13, electrically connects drive circuit board 13 and LED circuitboard 11.

By above-mentioned steps as can be known, backlight module assembling process of the present invention is very easy, only needs according to the position of first connector second connector embedding of drive circuit board can be finished the assembling of drive circuit board.Except easy to assembly, also can should be assembled in relevant position on the backboard, thereby have positioning function simultaneously by the first connector display driver circuit plate.

In sum, compared with prior art, the present invention has significant progress really.Obviously, those skilled in the art after having read this instructions and above each embodiment, every advantage or the function that can understand design of the present invention more and be had.

Below only the present invention is had been described in detail by a preferred implementation; obviously, this is not to limit the scope of the present invention, and those skilled in the art all can understand; under the prerequisite that does not exceed design of the present invention and protection domain, can make some remodeling to the present invention.

Claims

1. backlight module comprises:

LED circuitboard, it has first surface and second surface, and described second surface is provided with first connector;

Light emitting diode, it is embedded on the described LED circuitboard, and electrically connects with described first connector;

Drive circuit board, it has second connector, and this second connector and described first connector are chimeric; With

Backboard with through hole, described LED circuitboard are set on the described backboard, and described first connector passes in the through hole of described backboard.

2. backlight module as claimed in claim 1, wherein, described LED circuitboard has hole, and described light emitting diode is embedded in this hole.

3. backlight module as claimed in claim 1, wherein, described LED circuitboard has groove, and described light emitting diode is set in this groove.

4. backlight module as claimed in claim 1, wherein, described LED circuitboard has two sub-circuit boards, and described light emitting diode is set between described two sub-circuit boards.

5. backlight module as claimed in claim 1, wherein, described light emitting diode is welded on the described LED circuitboard by the electrode leg of its base.

6. backlight module as claimed in claim 1, wherein, described first connector is a socket, and this socket is outwards outstanding from the second surface of described LED circuitboard, described second connector is a plug, and this plug is outwards outstanding from the surface of described drive circuit board.

7. backlight module as claimed in claim 5 comprises:

Described light emitting diode is welded on the described second surface of described LED circuitboard by the electrode leg of its base, and its luminous end is exposed to the described first surface outside; And

Described second connector and described first connector are chimeric, signal is transferred to described LED circuitboard.

8. backlight module as claimed in claim 1, wherein, described backlight module also has framework, and this framework and the combination of described backboard are with ccontaining described LED circuitboard and described light emitting diode.

9. backlight module as claimed in claim 1 wherein, is provided with heat conducting film between described backboard and the described light emitting diode.